Marcelo Lobo Heldwein

Pós-doutorado

Formação complementar

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Orientou

Produções bibliográficas

• LAGO, JACKSON ; STECKLING, LÚCIO ; LOBO HELDWEIN, MARCELO . FPGA DIGITAL ARCHITECTURE FOR MULTILEVEL SYNCHRONOUS OPTIMAL PULSE WIDTH MODULATION WITH SEAMLESS PULSE PATTERN TRANSITIONS. REVISTA ELETRÔNICA DE POTÊNCIA , v. 28, p. 74-82, 2023.

• BERTOLDI, BRUNO ; MILITAO, LUCAS ANDRADE ; SOUSA, GEAN JACQUES MAIA DE ; BARBOSA, JADER RISO ; Heldwein, Marcelo Lobo . Thermal Characterization of Magnetic Components in Still Air. IEEE TRANSACTIONS ON POWER ELECTRONICS , v. X, p. 1-12, 2023.

• XIE, HAOTIAN ; NOVAK, MATEJA ; WANG, FENGXIANG ; DRAGICEVIC, TOMISLAV ; RODRÍGUEZ, JOSÉ ; BLAABJERG, FREDE ; KENNEL, RALPH ; Heldwein, Marcelo Lobo . Cooperative Decision-making Approach for Multi-objective Finite Control Set Model Predictive Control without Weighting Parameters. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , v. X, p. 1-11, 2023.

• ROIG GREIDANUS, MATEO DANIEL ; Heldwein, Marcelo Lobo . Model-Based Control Strategy to Reduce the Fault Current of a Gas Turbine Synchronous Generator under Short-Circuit in Isolated Networks. ELECTRIC POWER SYSTEMS RESEARCH , v. 204, p. 107687, 2022.

• WU, YITONG ; ZHANG, ZHEN ; YANG, QIFAN ; TIAN, WEI ; KARAMANAKOS, PETROS ; Heldwein, Marcelo Lobo ; KENNEL, RALPH . A Direct Model Predictive Control Strategy with an Implicit Modulator for Six-Phase PMSMs. IEEE Journal of Emerging and Selected Topics in Power Electronics , v. X, p. 1-1, 2022.

• AHMED, MOSTAFA ; HARBI, IBRAHIM ; KENNEL, RALPH ; Heldwein, Marcelo Lobo ; RODRÍGUEZ, JOSÉ ; ABDELRAHEM, MOHAMED . Performance Evaluation of PV Model-Based Maximum Power Point Tracking Techniques. ELECTRONICS , v. 11, p. 2563, 2022.

• DUAN, QIANWEN ; TIAN, WEI ; YANG, QIFAN ; GAO, XIAONAN ; MAO, YAO ; KARAMANAKOS, PETROS ; KENNEL, RALPH ; Heldwein, Marcelo Lobo . Computationally Efficient Overmodulation Methods for Synchronous Motor Drive Systems. IEEE Transactions on Industrial Informatics , v. X, p. 1-13, 2022.

• HARBI, IBRAHIM ; AHMED, MOSTAFA ; Heldwein, Marcelo Lobo ; KENNEL, RALPH ; ABDELRAHEM, MOHAMED . Enhanced Fault-Tolerant Robust Deadbeat Predictive Control for Nine-level ANPC-Based Converter. IEEE Access , v. X, p. 1-1, 2022.

• CHAI, NA ; TIAN, WEI ; GAO, XIAONAN ; RODRIGUEZ, JOSE ; Heldwein, Marcelo Lobo ; KENNEL, RALPH . Three-phase Model-based Predictive Control Methods with Reduced Calculation Burden for Modular Multilevel Converters. IEEE Journal of Emerging and Selected Topics in Power Electronics , v. X, p. 1-1, 2022.

• MILITÃO, LUCAS A. ; FERNANDES, CAIO D. ; DOS SANTOS, DIEGO ; MACHADO, DOUGLAS M. ; HELDWEIN, MARCELO L. ; RAMBO, CARLOS R. ; DA SILVA, ALEXANDRE K. ; BARBOSA JR., JADER R. . A novel cooling geometry for subsea variable speed drives. APPLIED THERMAL ENGINEERING , v. 185, p. 116483-16, 2021.

• KITTEL RIES, LISANDRA ; LOBO HELDWEIN, MARCELO . DESIGN AND OPTIMIZATION APPROACH FOR THE MAGNETIC COMPONENTS OF A FIVE-LEVEL CURRENT SOURCE RECTIFIER. ELETRÔNICA DE POTÊNCIA (IMPRESSO) , v. 26, p. 1-12, 2021.

• LENZ, EDUARDO ; PAGANO, DANIEL J. ; RUSELER, ADRIANO ; Heldwein, Marcelo Lobo . Two-Parameter Stability Analysis of Resistive Droop Control Applied to Parallel-Connected Voltage-Source Inverters. IEEE Journal of Emerging and Selected Topics in Power Electronics , v. X, p. 1-1, 2020.

• FRAYTAG, J ; KIRSTEN, ANDRE LUIS ; Heldwein, Marcelo . Impact Analysis of a Multi-Variables Modulation on the Transformer of the Dual-Active-Bridge Converter. IET Power Electronics , v. X, p. 1-10, 2020.

• RIES, LISANDRA KITTEL ; Heldwein, Marcelo Lobo . Current Balancing Control Methods using Advanced Carrier-Based Modulation for Five-Level Current Source Rectifiers. IEEE TRANSACTIONS ON POWER ELECTRONICS , v. X, p. 1-1, 2020.

• MARTINS, MARCOS A. I. ; FERNANDES, PIARA ; HELDWEIN, MARCELO L. . Proposals for Regulatory Framework Modifications for Microgrid Insertion - The Brazil Use Case. IEEE Access , v. X, p. 1-1, 2020.

• FRAYTAG, JEFERSON ; LUÍS KIRSTEN, ANDRÉ ; LOBO HELDWEIN, MARCELO . IMPACTS OF THE MULTI-VARIABLES MODULATION ON TRANSFORMER AND SOFT-SWITCHING OF A DUAL-ACTIVE-BRIDGE. ELETRÔNICA DE POTÊNCIA (IMPRESSO) , v. 25, p. 1-12, 2020.

• MORAES, CAIO ; BROCKVELD JUNIOR, SERGIO ; Heldwein, Marcelo ; FRANCA, ANDRE ; VACCARI, ANDERSON ; WALTRICH, GIERRI . Power Conversion Technologies for a Hybrid Energy Storage System in Diesel-Electric Locomotives. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , v. X, p. 1-1, 2020.

• JACQUES MAIA DE SOUSA, GEAN ; H. T. SCHMIDT, LUIZ ; LOBO HELDWEIN, MARCELO ; JUAN PAGANO, DANIEL . PASSIVE VOLTAGE BALANCING IN MODULAR MULTILEVEL CONVERTER DURING PRECHARGE: ANALYSIS AND DESIGN. ELETRÔNICA DE POTÊNCIA (IMPRESSO) , v. 25, p. 1-12, 2020.

• STÉFANO DE SOUZA PELEGRINO, LUCAS ; LOBO HELDWEIN, MARCELO ; WALTRICH, GIERRI . Energy management system for electric vehicle, residence and public electric network control. REVISTA ELETRÔNICA DE POTÊNCIA , v. 24, p. 1-9, 2019.

• WALTRICH, GIERRI ; Heldwein, Marcelo ; STEFANO DE SOUZA PELEGRINO, LUCAS . Integrated system for power flow control between electric vehicle, utility grid and residence. IET Power Electronics , v. X, p. 1-8, 2019.

• LAMBERT, GUSTAVO ; SOARES, MARCUS VIEIRA ; WHEELER, PATRICK ; Heldwein, Marcelo Lobo ; DE NOVAES, YALES ROMULO . Current Fed Multipulse Rectifier Approach for Unidirectional HVDC and MVDC Applications. IEEE TRANSACTIONS ON POWER ELECTRONICS , v. x, p. 1-1, 2018.

• JACOBOSKI, MARCOS JOSE ; LANGE, ANDRE DE BASTIANI ; Heldwein, Marcelo Lobo . Closed-Form Solution for Core Loss Calculation in Single-Phase Bridgeless PFC Rectifiers Based on the iGSE Method. IEEE TRANSACTIONS ON POWER ELECTRONICS , v. PP, p. 1-1, 2017.

• PERIN, ARNALDO ; SILVA, NILTON ; Heldwein, Marcelo . Wireless Converter With Zcs Rectifier. ELETRÔNICA DE POTÊNCIA (IMPRESSO) , v. 22, p. 298-309, 2017.

• RIES, L. K. ; SOEIRO, T. B. ; ORTMANN, MARCIO S. ; Heldwein, M. L. . Analysis of Carrier Based PWM Patterns for a Three-Phase Five-Level Bidirectional Buck+Boost-Type Rectifier. IEEE Transactions on Power Electronics , v. 00, p. 1-12, 2016.

• LAGO, JACKSON ; Heldwein, M. L. . Generalized Synchronous Optimal Pulsewidth Modulation for Multilevel Inverters. IEEE Transactions on Power Electronics , v. 00, p. 1-10, 2016.

• JAPPE, TIAGO KOMMERS ; POLLA, RAMIRO R. ; FUERBACK, ANDRE L. ; Heldwein, M. L. ; SOEIRO, THIAGO B. ; ANDRICH, ROBERTO . An Fpga-based Single-phase Interleaved Boost-type Pfc Rectifier Employing Gan Hemt Devices. Eletrônica de Potência (Impresso) , v. 19, p. 414-422, 2014.

• ORTMANN, MARCIO ; MUSSA, SAMIR ; Heldwein, Marcelo . Three-phase Multilevel PFC Rectifier Based on Multi-State Switching Cells. IEEE Transactions on Power Electronics , v. 30, p. 1-1, 2014.

• DE BASTIANI LANGE, ANDRE ; SOEIRO, THIAGO ; ORTMANN, MARCIO ; Heldwein, Marcelo . Three-Level Single-Phase Bridgeless PFC Rectifiers. IEEE Transactions on Power Electronics , v. 30, p. 1-1, 2014.

• ORTMANN, MARCIO ; SOEIRO, THIAGO ; Heldwein, Marcelo . High Switches Utilization Single-phase PWM Boost-type PFC Rectifier Topologies Multiplying the Switching Frequency. IEEE Transactions on Power Electronics , v. 29, p. 1-1, 2014.

• ANGULO, MAURICIO ; Ruiz-Caballero, Domingo A. ; LAGO, JACKSON ; Heldwein, Marcelo Lobo ; Mussa, Samir Ahmad . Active Power Filter Control Strategy With Implicit Closed-Loop Current Control and Resonant Controller. IEEE Transactions on Industrial Electronics (1982. Print) , v. 60, p. 2721-2730, 2013.

• HEERDT, JOSELITO ; COUTINHO, DANIEL ; MUSSA, SAMIR ; Heldwein, Marcelo . Control Strategy for Current Harmonic Programmed AC Active Electronic Power Loads. IEEE Transactions on Industrial Electronics (1982. Print) , v. 61, p. 1-1, 2013.

• BATSCHAUER, A. L. ; Mussa, S. A. ; HELDWEIN, M.L. . Three-Phase Hybrid Multilevel Inverter Based on Half-Bridge Modules. IEEE Transactions on Industrial Electronics (1982. Print) , v. 59, p. 668-678, 2012.

• ORTMANN, M. S. ; Mussa, S. A. ; HELDWEIN, M.L. . Generalized Analysis of a Multi-State Switching Cells-Based Single-Phase Multilevel PFC Rectier. IEEE Transactions on Power Electronics , v. 27, p. 46-56, 2012.

• Dupczak, B. S. ; Perin, A.J. ; HELDWEIN, M.L. . Space Vector Modulation Strategy Applied to Interphase Transformers-Based Five-Level Current Source Inverters. IEEE Transactions on Power Electronics , v. 27, p. 2740-2751, 2012.

• Silva, R. N. A. L. ; Barreto, L.H.S.C. ; Praca, P. P. ; Oliveira Jr., D.S. ; HELDWEIN, M.L. ; Mussa, S. A. . Conversor Híbrido Simétrico De Cinco Níveis Baseado Nas Topologias Half-bridge/ANPC. Eletrônica de Potência (Impresso) , v. 17, p. 623-631, 2012.

• HELDWEIN, M.L. ; Dalessandro, L. ; KOLAR, J.W. . The Three-Phase Common Mode Inductor: Modeling and Design Issues. IEEE Transactions on Industrial Electronics (1982. Print) , v. 58, p. 3264-3274, 2011.

• Lago, J. ; HELDWEIN, M.L. . Operation and Control Oriented Modeling of a Power Converter for Current Balancing and Stability Improvement of DC Active Distribution Networks. IEEE Transactions on Power Electronics , v. 26, p. 877-885, 2011.

• Heldwein, Marcelo Lobo ; ERTL, H. ; BIELA, J. ; Kolar, Johann W. . Implementation of a Transformer-Less Common Mode Active Filter for Off-Line Converter Systems. IEEE Transactions on Industrial Electronics (1982. Print) , v. 57, p. 1772-1786, 2010.

• HELDWEIN, M.L. ; NUSSBAUMER, T. ; KOLAR, J.W. . Common mode modelling and filter design for a three-phase buck-type pulse width modulated rectifier system. IET Power Electronics (Print) , v. 3, p. 209-218, 2010.

• HELDWEIN, M.L. ; Mussa, S. A. ; BARBI, I. . Three-Phase Multilevel PWM Rectifiers Based on Conventional Bidirectional Converters. IEEE Transactions on Power Electronics , v. 25, p. 545-549, 2010.

• Ruiz-Caballero, Domingo A. ; Ramos-Astudillo, Reynaldo M. ; Mussa, S. A. ; HELDWEIN, M.L. . Symmetrical Hybrid Multilevel DC?AC Converters With Reduced Number of Insulated DC Supplies. IEEE Transactions on Industrial Electronics (1982. Print) , v. 57, p. 2307-2314, 2010.

• BIELA, J. ; Wirthmueller, A. ; Waespe, R. ; HELDWEIN, M.L. ; Raggl, K. ; KOLAR, J.W. . Passive and Active Hybrid Integrated EMI Filters. IEEE Transactions on Power Electronics , v. 24, p. 1340-1349, 2009.

• HELDWEIN, M.L. ; KOLAR, J.W. . Impact of EMC Filters on the Power Density of Modern Three-Phase PWM Converters. IEEE Transactions on Power Electronics , v. 24, p. 1577-1588, 2009.

• HELDWEIN, M.L. ; BIELA, J. ; ERTL, H. ; NUSSBAUMER, T. ; KOLAR, J.W. . Novel Three-Phase CM/DM Conducted Emissions Separator. IEEE Transactions on Industrial Electronics (1982. Print) , v. 56, p. 3693-3703, 2009.

• HELDWEIN, M.L. ; KOLAR, J.W. . Design of minimum volume emc input filters for an ultra compact three-phase pwm rectifier. Eletrônica de Potência , v. 14, p. 85-96, 2009.

• Rodrigues, J. P. ; Mussa, S. A. ; HELDWEIN, M.L. ; Perin, A.J. . Three-Level ZVS Active Clamping PWM for the dc-dc Buck Converter. IEEE Transactions on Power Electronics , v. 24, p. 2249-2258, 2009.

• NUSSBAUMER, T. ; GONG, G. ; HELDWEIN, M.L. ; KOLAR, J.W. . Modeling and Robust Control of a Three-Phase Buck+Boost PWM Rectifier (VRX-4). IEEE Transactions on Industry Applications , v. 44, p. 650-662, 2008.

• NUSSBAUMER, T. ; HELDWEIN, M.L. ; GONG, G. ; ROUND, S. ; KOLAR, J.W. . Comparison of Prediction Techniques to Compensate Time Delays Caused by Digital Control of a Three-Phase Buck-Type PWM Rectifier System. IEEE Transactions on Industrial Electronics , v. 55, p. 791-799, 2008.

• HELDWEIN, M.L. ; KOLAR, J.W. ; Drofenik, U. ; BIELA, J. ; ERTL, H. ; FRIEDLI, T. ; ROUND, S. . PWM Converter Power Density Barriers. IEEJ Transactions on Industry Applications , v. 128, p. 468-480, 2008.

• HELDWEIN, M.L. ; ROUND, S. ; Karutz, P. ; KOLAR, J.W. . Towards a 30kW/liter, Three-Phase Unity Power Factor Rectifier. IEEJ Transactions on Industry Applications , v. 128, p. 481-490, 2008.

• Heldwein, Marcelo Lobo ; Kolar, Johann W. . Winding Capacitance Cancellation forThree-Phase EMC Input Filters. IEEE Transactions on Power Electronics , v. 23, p. 2062-2074, 2008.

• HELDWEIN, M.L. ; ROUND, S. ; Schafmeister, F. ; PEREIRA, E. ; SERPA, L. ; KOLAR, J.W. . Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End. IEEJ Transactions on Industry Applications , v. 126, p. 578-588, 2006.

• NUSSBAUMER, T. ; HELDWEIN, M.L. ; KOLAR, J.W. . Differential Mode Input Filter Design for a Three-Phase Buck-Type PWM Rectifier Based on Modeling of the EMC Test Receiver. IEEE Transactions on Industrial Electronics , v. 53, p. 1649-1661, 2006.

• GONG, G. ; HELDWEIN, M.L. ; Drofenik, U. ; KOLAR, J.W. . Comparative Evaluation of Three-Phase High-Power-Factor AC-DC Converter Concepts for Application in Future More Electric Aircraft. IEEE Transactions on Industrial Electronics , v. 52, p. 727-737, 2005.

• Heldwein, M. L. ; BAZZO, E. ; Fagundes, J.C.S. ; Pica, C. Q. ; MOIA, JOABEL ; TONI JUNIOR, A. R. ; TONIELO, M. L. ; OBA, R. ; POSSAMAI, T. ; BITTENCOURT, P. F. ; CARIO, S. A. F. ; RODRIGUES, S. M. ; PACHECO, J. A. . Rotas Estratégicas Setoriais para a Indústria Catarinense 2022: Energia. 1. ed. Florianópolis: FIESC, 2014. v. 1. 54p .

• HELDWEIN, M.L. . EMC Filtering of Three-Phase PWM Converters - Three-phase Line Filter Concepts and Design for Modern Power Electronics. 1. ed. Saarbrucken: Suddeutscher Verlag fur Hochschulschriften Aktiensgesellschaft & Co. KG, 2009. v. 1. 437p .

• BARCELOS, R. P. ; Heldwein, M. L. . Detailed electrical modeling of a solid-state DC breaker. PCIM Europe Insights - Mesago Messe Frankfurt GmbH, 01 dez. 2020.

• RECH, T. F. ; Heldwein, M. L. . Detailed Dynamic Model of an Active Ripple Reduction Circuit and its Multi-Loop Control Strategy. In: PCIM Europe digital days 2021, 2021, Nuremberg. PCIM Europe digital days 2021, 2021.

• DE SOUZA, EDUARDO VALMIR ; Heldwein, Marcelo Lobo . Reconfigurable Resonant Converter with Wide Output Voltage Range for DC Fast Chargers. In: 2021 Brazilian Power Electronics Conference (COBEP), 2021, João Pessoa. 2021 Brazilian Power Electronics Conference (COBEP), 2021. p. 1.

• PINTO, R.L.OLIVEIRA ; GRABOWSKY, E.F.C. ; HELDWEIN, M.L. . Dynamic Modeling of an Active Current Doubler Rectifier Applied to Resonant Converters. In: 2021 Brazilian Power Electronics Conference (COBEP), 2021, João Pessoa. 2021 Brazilian Power Electronics Conference (COBEP), 2021. p. 1.

• FISCH, LEANDRO B. K. ; HELDWEIN, MARCELO L. . Modeling, Control and Operation of a 10 MW Direct-Drive Wind Energy Conversion System. In: 2021 Brazilian Power Electronics Conference (COBEP), 2021, João Pessoa. 2021 Brazilian Power Electronics Conference (COBEP), 2021. p. 1.

• BARCELOS, R. P. ; HELDWEIN, M.L. . Electrical Modeling of an Interrupting Topology Solid-State Dc Breaker. In: PCIM Europe digital days 2020, 2020, Nuremberg. PCIM Europe digital days 2020, 2020.

• FURLAN, A. ; Heldwein, M. L. ; MEYNARD, T. ; MORENTIN, A. ; FONTES, G. . Fast Hybrid Design Approach for Optimization of Inductors. In: PCIM Europe digital days 2020, 2020, Nuremberg. PCIM Europe digital days 2020, 2020.

• CHAVES, HENRIQUE ; Heldwein, Marcelo Lobo . Grid-Tied Three-Phase Inverter Current Control Considering Low Voltage Ride Through Capability: A Comparison between Stationary and Synchronous Reference Frames. In: 2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2020, Dubrovnik. 2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2020. p. 57.

• CHAGAS, RAFAEL B. P. ; FURLAN, ANDRE ; HELDWEIN, MARCELO L. . Finite Element Method Analysis of a Three-Media Submarine Cable Ground Return Impedance at Varying Depth. In: 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), 2020, Aalborg. 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), 2020. p. 1.

• FISCH, LEANDRO BENHUR KLINGER ; Heldwein, Marcelo Lobo . 10-MW Direct-Drive PMSG-Based Wind Energy Conversion System Model. In: 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), 2020, Aalborg. 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), 2020. p. 1.

• STECKLING, L. ; Heldwein, M. L. . Model-Based Synchronous Optimal Modulation for Three-Level Inverters Applied to Electrical Submersible Pumps Systems. In: PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2019, Nuremberg. PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2019.

• VIGLUS, FRANCISCO JOSE ; LOBO HELDWEIN, MARCELO . Hybrid Subsea Power Cable Emulator. In: 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019, Anaheim. 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019. p. 3373.

• FURLAN, A. ; Heldwein, M. L. . Hybrid Method to Compute the Total Series Impedance of Submarine Power Cables. In: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019, Lisboa. 45th Annual Conference of the IEEE Industrial Electronics Society, 2019. p. 2178-2183.

• BROCKVELD, S. L. ; MORAES, C. G. S. ; CAVILHA, P. P. ; PACHECO, A. L. S. ; Heldwein, M. L. ; WALTRICH, G. . Multi-Port System for Braking Energy Recovery in Diesel-Electric Locomotives - Focus on the Multi-Interphase Transformer Design. In: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019, Lisboa. 45th Annual Conference of the IEEE Industrial Electronics Society, 2019. p. 5933-5938.

• BERTOLDI, B. ; GRABOVSKI, E. F. C. ; Lange, A. B. ; Heldwein, M. L. . Variable-step DFT Algorithm to Speed Up Optimization Routines Applied to a Three-Phase Interleaved Vienna Rectifier. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• GRABOVSKI, E. F. C. ; Heldwein, M. L. ; Mussa, S. A. . Three-Phase Adaptive Frequency Estimator with a Delayed Signal Cancellation Pre-Filter Under Heavily Distorted Grid Conditions. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• RUIZ-CABALLERO, DOMINGO ; MIRANDA, LUIS COLQUE ; PAREDES, CARLOS ; RIEDEMANN, JAVIER ; MONTECINOS, WERNER JARA ; Heldwein, Marcelo Lobo ; Mussa, Samir Ahmad . Symmetrical Hybrid Multilevel VSI and CSI Inverters Derived from Dc-Dc Converters. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• FRAYTAG, JEFERSON ; KIRSTEN, ANDRE LUIS ; LOBO HELDWEIN, MARCELO . Impacts of the Multi-Variables Modulation on Transformer and Soft-Switching of a DAB. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• FURLAN, ANDRE ; MORENTIN, ALVARO ; FONTES, GUILLAUME ; DELAMARE, GUILLAUME ; HELDWEIN, MARCELO L. ; MEYNARD, THIERRY . Homothetic Method to Compute Winding Losses in the Design of Power Inductors. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• JACOBOSKI, MARCOS JOSE ; DE BASTIANI LANGE, ANDRE ; Heldwein, Marcelo Lobo . Closed-Form Solutions for Core and Winding Losses Calculation in Single-Phase Boost PFC Rectifiers. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• DA S. MORAES, CAIO G. ; JUNIOR, SERGIO L. B. ; CAVILHA, PEDRO P. ; PACHECO, ANTONIO L. S. ; HELDWEIN, MARCELO L. ; WALTRICH, GIERRI . Multi-Port System for Storage and Management of Regenerative Braking Energy in Diesel-Electric Locomotives. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• SCHMIDT, LUIZ H. T. ; DE SOUSA, GEAN J. M. ; HELDWEIN, MARCELO L. ; PAGANO, DANIEL J. . Passive Capacitor Voltage Balancing in Modular Multilevel Converter During its Precharge: Analysis and Design. In: 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019, Santos. 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC), 2019. p. 1.

• MUNARETTO, LUCAS ; HELDWEIN, MARCELO L. . Single-phase transformerless dual buck-based grid-connected inverter. In: 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), 2018, San Antonio. 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), 2018. p. 161.

• JAPPE, TIAGO KOMMERS ; AHMAD MUSSA, SAMIR ; Heldwein, Marcelo Lobo . Evaluation of SiC-Based Three-Phase PFC Rectifier Design. In: 2018 IEEE International Telecommunications Energy Conference (INTELEC), 2018, Turino. 2018 IEEE International Telecommunications Energy Conference (INTELEC), 2018. p. 1.

• SILVA, D. D. ; ORTMANN, M. S. ; Heldwein, M. L. . Development and Implementation of an Interconnection Module for Smart Microgrids. In: 13th IEEE/IAS International Conference on Industry Applications (INDUSCON 2018), 2018, São Paulo. 13th IEEE/IAS International Conference on Industry Applications (INDUSCON 2018), 2018. p. 1-6.

• BERTOLDI, B. ; BRIDON JUNIOR, M. M. ; DALL?ASTA, M. S. ; GREIDANUS, M. D. R. ; KIRSTEN, A. L. ; Heldwein, M. L. . A Non-Ideal SEPIC DCM Modeling for LED Lighting Applications. In: 4th IEEE Southern Power Electronics Conference (SPEC 2018), 2018, Cingapura. 4th IEEE Southern Power Electronics Conference (SPEC 2018), 2018.

• FUERBACK, V. B. ; SOUSA, G. J. M. ; Heldwein, Marcelo Lobo . Hybrid Unidirectional MMC-Based Rectifier. In: 4th IEEE Southern Power Electronics Conference (SPEC 2018), 2018, Cingapura. 4th IEEE Southern Power Electronics Conference (SPEC 2018), 2018.

• FINAMOR, GUSTAVO A. ; SOLANO, DIEGO L. S. ; ORTMANN, MARCIO S. ; RUSELER, ADRIANO ; MUNARETTO, LUCAS ; DA SILVA, DANIELA D. ; COELHO, ROBERTO F. ; HELDWEIN, MARCELO L. . Solar photovoltaic static conversion system applied to a smart microgrid. In: 2017 IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2017, Florianopolis. 2017 IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2017. p. 1.

• ORTMANN, MARCIO S. ; MARYAMA, VICTOR ; CAMURCA, LUIZ J. ; GILI, LUIZ C. ; SUAREZ-SOLANO, DIEGO L. ; DANTAS, DANIELA ; FINAMOR, GUSTAVO ; DA SILVA, VICTOR L. ; MUNARETTO, LUCAS ; RUSELER, ADRIANO ; ANDRETA, ANDRE G. ; COELHO, ROBERTO F. ; HELDWEIN, MARCELO L. . Architecture, components and operation of an experimental hybrid ac/dc smart microgrid. In: 2017 IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2017, Florianopolis. 2017 IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2017. p. 1.

• FINAMOR, GUSTAVO A. ; SOLANO, DIEGO L. S. ; ORTMANN, MARCIO S. ; RUSELER, ADRIANO ; MUNARETTO, LUCAS ; GILI, LUIZ C. ; COELHO, ROBERTO F. ; HELDWEIN, MARCELO L. . Stability analysis of a smart microgrid solar photovoltaic system. In: 2017 Brazilian Power Electronics Conference (COBEP), 2017, JUIZ DE FORA. 2017 Brazilian Power Electronics Conference (COBEP), 2017. p. 1.

• DE BASTIANI LANGE, ANDRE ; Heldwein, Marcelo Lobo . Optimal inductor design for single-phase three-level bridgeless PFC rectifiers. In: 2017 Brazilian Power Electronics Conference (COBEP), 2017, JUIZ DE FORA. 2017 Brazilian Power Electronics Conference (COBEP), 2017. p. 1.

• DE SOUSA, GEAN J. M. ; HELDWEIN, MARCELO L. . Concentrated submodules model for modular multilevel converters. In: 2017 IEEE Southern Power Electronics Conference (SPEC), 2017, Puerto Varas. 2017 IEEE Southern Power Electronics Conference (SPEC), 2017. p. 1.

• LAGO, JACKSON ; Heldwein, Marcelo Lobo . Synchronous optimal pulsewidth modulation digital implementation concept for multilevel converters. In: 2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016, Long Beach. 2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016. p. 2833.

• MOIA, JOABEL ; Heldwein, M. L. . Carrier-Based Modulation Technique to Reduce Low Frequency Ripple at the Partial Dc-Link Voltages of a Three-Level/-Phase/-Wire NPC Converter Applied. In: PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2016, Nuremberg. PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. Stuttgart, Alemanha: Mesago, 2016.

• ZENI, VITOR S. ; MARYAMA, VICTOR ; MARTINS, MARCOS A. I. ; BIANCHINI, IVAN L. ; PICA, CESARE Q. ; HELDWEIN, MARCELO L. ; E SILVA, AGUINALDO S. ; DA SILVA, JOSE NILO R. . Droop-controlled integration of diesel generator sets in uninterruptible supply systems using back-to-back converters. In: IECON 2016 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016, Florence. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016. p. 2265.

• SAGGIN, FABRICIO ; COUTINHO, DANIEL ; HELDWEIN, MARCELO L. . Parallel operation of single-phase voltage source inverters: Modeling and control based on LMI constraints. In: IECON 2016 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016, Florence. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016. p. 270.

• DE SOUZA PELEGRINO, LUCAS STEFANO ; Heldwein, Marcelo Lobo ; WALTRICH, GIERRI . Low-intrusion vehicle-to-home concept. In: 2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARSITEC), 2016, Toulouse. 2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC), 2016. p. 1.

• ORTMANN, MARCIO S. ; ANDRETA, A. G. ; CAMURCA, L. J. ; SILVA, V. L. ; HELDWEIN, M.L. ; OLIVEIRA, G. A. . Arquitetura e Componentes de uma Microrrede Inteligente Experimental. In: VIII Congresso de Inovação Tecnológica em Energia Elétrica (VIII CITENEL), 2015, Costa do Sauípe. Anais do VIII CITENEL, 2015.

• ANDRETA, ANDRE G. ; ORTMANN, MARCIO S. ; HELDWEIN, MARCELO L. . Hybrid current control technique applied to grid connected inverters. In: 2015 IEEE International Conference on Industrial Technology (ICIT), 2015, Seville. 2015 IEEE International Conference on Industrial Technology (ICIT), 2015. p. 2268.

• MOIA, JOABEL ; LOBO HELDWEIN, MARCELO . Scalar modulation technique applied to a three-level/-phase/-wire back-to-back converter system with reduced dc-link capacitance for AC drives. In: 2015 IEEE International Conference on Industrial Technology (ICIT), 2015, Seville. 2015 IEEE International Conference on Industrial Technology (ICIT), 2015. p. 3091.

• DE SOUSA, GEAN JACQUES MAIA ; DIAS, ADRIANO DA SILVA ; ALVES, JOABLE ANDRADE ; Heldwein, Marcelo Lobo . Modeling and control of a Modular Multilevel Converter for medium voltage drives rectifier applications. In: 2015 IEEE 24th International Symposium on Industrial Electronics (ISIE), 2015, Buzios. 2015 IEEE 24th International Symposium on Industrial Electronics (ISIE), 2015. p. 1080.

• SOEIRO, THIAGO B. ; ORTMANN, MARCIO S. ; HELDWEIN, MARCELO L. . Three-phase unidirectional DELTA-switch multistate switching cells-based multilevel rectifier. In: 2015 17th European Conference on Power Electronics and Applications (EPE '15 ECCE Europe), 2015, Geneva. 2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe), 2015. p. 1.

• CAMURCA, L. J. ; Lago, J. ; Heldwein, M. L. . High Efficiency Wind Energy Conversion System Based on the Three-Level Delta-Switch T-Type Converter and PMSG Model-Based Loss Minimization. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015.

• SILVA, N. ; PINTO, R. L. O. ; Heldwein, M. L. ; PERIN, ARNALDO J. . Magnetic Link Device Design for an Inductive Power Transfer System. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. Magnetic Link Device Design for an Inductive Power Transfer System, 2015.

• RIES, L. K. ; Heldwein, M. L. . DC CURRENT BALANCING CONTROL OF A THREE-PHASE FIVE-LEVEL BIDIRECTIONAL BUCK+BOOST-TYPE CONVERTER. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015.

• JAPPE, TIAGO K. ; MUSSA, SAMIR ; Heldwein, M. L. . Design of a high performance AC-AC drive system based on indirect matrix converters employing SiC MOSFETs. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015.

• BRITO JR., F. B. ; Heldwein, M. L. ; Torrico-Bascopé, R.P. . Active Current Balancing Technique employing the Lunze's Transformation for Converters based on Multistate Switching Cells. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015.

• MARTINS, MARCOS AURELIO IZUMIDA ; PICA, CESARE QUINTEIRO ; MARYAMA, VICTOR ; PACHECO, BRUNO ; Heldwein, Marcelo Lobo ; DA SILVA JUNIOR, JOSE NILO RODRIGUES . Design and implementation of a microgrid power management unit using a back-to-back converter in a residential condominium connected at medium voltage. In: 2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC), 2015, Fortaleza. 2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC). p. 1.

• ORTMANN, MARCIO S. ; MUSSA, SAMIR A. ; Heldwein, M. L. . EVALUATION OF SEMICONDUCTOR LOSSES AND EFFICIENCY IN SINGLE-PHASE MULTILEVEL MULTISTATE SWITCHING CELLS BASED PFC RECTIFIERS. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015.

• JACOBOSKI, M. J. ; Heldwein, M. L. . Zero Voltage Switching Dual Neutral Point Clamped Dc-Dc Converter. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015.

• LAMBERT, G. ; Heldwein, M. L. ; Novaes, Y.R. . Simplified modeling and control of a high-power high-voltage isolated dc-dc converter. In: 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015, Fortaleza. 13th Brazilian Power Electronics Conference - COBEP and 1st Southern Power Electronics, 2015.

• SOEIRO, THIAGO B. ; DE SOUSA, GEAN J. M. ; ORTMANN, MARCIO S. ; HELDWEIN, MARCELO L. . Three-phase unidirectional buck-type third harmonic injection rectifier concepts. In: 2014 IEEE Applied Power Electronics Conference and Exposition APEC 2014, 2014, Fort Worth. 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014. p. 928.

• SOEIRO, THIAGO B. ; Jappe, T. K. ; SANTOS, W. M. ; Martins, D.C. ; Heldwein, Marcelo Lobo . Propulsion and battery charging systems of an all-electric boat fully constructed with interleaved converters employing interphase transformers and Gallium Nitride (GaN) power FET semiconductors. In: Twenty-Ninth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2014, Fort Worth, TX. Twenty-Ninth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2014. p. 3212-3217.

• COLLIER, DANIEL A. F. ; ORTMANN, MARCIO S. ; HELDWEIN, MARCELO L. . AC currents synchronization technique based on the normalized phase-locked loop for modulation of a three-phase PWM delta-switch rectifier. In: 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL), 2014, Santander. 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL). p. 1.

• LAGO, JACKSON ; Heldwein, Marcelo Lobo . Multilevel synchronous optimal pulsewidth modulation generalized formulation. In: 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL), 2014, Santander. 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL), 2014. p. 1.

• SOEIRO, T. B. ; ORTMANN, M. ; Heldwein, M. L. . Three-phase five-level bidirectional buck- + boosttype PFC converter for DC distribution systems. In: 2013 IEEE International Conference on Industrial Technology (ICIT 2013), 2013, Cape Town. 2013 IEEE International Conference on Industrial Technology (ICIT). p. 928.

• SOEIRO, THIAGO B. ; JAPPE, TIAGO K. ; BEZERRA, PEDRO A. M. ; HELDWEIN, MARCELO L. . Bidirectional delta-switch indirect matrix converter: Topologies and modulation strategies. In: 2013 IEEE International Conference on Industrial Technology (ICIT 2013), 2013, Cape Town. 2013 IEEE International Conference on Industrial Technology (ICIT). p. 1880.

• Bezerra, P. A. M. ; ORTMANN, M. S. ; Heldwein, M. L. . Modulation Strategies for the Two-Level Three-Phase Delta-Switch Voltage Source Inverter. In: IEEE International Conference on Industrial Technology (ICIT 2013), 2013, Cape Town, África do Sul. Proceedings of the IEEE International Conference on Industrial Technology (ICIT 2013), 2013.

• COLLIER, DANIEL A. F. ; HELDWEIN, MARCELO L. . Comparison of modulation strategies driving a three-phase PWM delta-switch rectifier in wind energy conversion systems applications. In: 2013 IEEE Applied Power Electronics Conference and Exposition APEC 2013, 2013, Long Beach. 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC). p. 386.

• ORTMANN, MARCIO S. ; HOFFMANN, WAGNER ; MUSSA, SAMIR A. ; HELDWEIN, MARCELO L. . Multilevel multistate switching cells PEBBs as the basis for the implementation of advanced rectifiers. In: 2013 IEEE Applied Power Electronics Conference and Exposition APEC 2013, 2013, Long Beach. 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC). p. 1871.

• MOIA, JOABEL ; Heldwein, Marcelo Lobo . Three-level NPC-based bidirectional PWM converter operation for high availability/power quality bipolar DC distribution networks. In: 2013 15th European Conference on Power Electronics and Applications (EPE), 2013, Lille. 2013 15th European Conference on Power Electronics and Applications (EPE). p. 1.

• DE SOUSA, GEAN J. M. ; HELDWEIN, MARCELO L. . Three-phase unidirectional modular multilevel converter. In: 2013 15th European Conference on Power Electronics and Applications (EPE), 2013, Lille. 2013 15th European Conference on Power Electronics and Applications (EPE). p. 1.

• LANGE, ANDRE B. ; SOEIRO, THIAGO B. ; ORTMANN, MARCIO S. ; HELDWEIN, MARCELO L. . New unidirectional high-efficiency three-level single-phase bridgeless PFC rectifier. In: 2013 15th European Conference on Power Electronics and Applications (EPE), 2013, Lille. 2013 15th European Conference on Power Electronics and Applications (EPE). p. 1.

• FUERBACK, ANDRE L. ; PERIN, ARNALDO J. ; HELDWEIN, MARCELO L. ; POSTIGLIONE, CICERO S. . Single-phase/-stage NPC-based rectifier integrating a simple DCM PFC technique. In: 2013 15th European Conference on Power Electronics and Applications (EPE), 2013, Lille. 2013 15th European Conference on Power Electronics and Applications (EPE). p. 1.

• SOEIRO, THIAGO B. ; Heldwein, Marcelo . Bidirectional three-phase buck-+boost-type PFC rectifier for bipolar DC distribution systems. In: 2013 15th European Conference on Power Electronics and Applications (EPE), 2013, Lille. 2013 15th European Conference on Power Electronics and Applications (EPE). p. 1.

• PEREIRA DA SILVA, GABRIELA ; TRENTINI, FABRICIO ; ODAGUIRI, VITOR TELLES ; BRESSAN, MARCOS VINICIUS ; Heldwein, Marcelo Lobo ; BATSCHAUER, ALESSANDRO LUIZ . Hybrid three-phase multilevel inverter based ON NPC cascaded to half-bridge cells. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference. p. 72.

• SOEIRO, THIAGO B. ; CARBALLO, ROBERTO ; MOIA, JOABEL ; GARCIA, GUILLERMO O. ; HELDWEIN, MARCELO L. . Three-phase five-level active-neutral-point-clamped converters for medium voltage applications. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference. p. 85.

• DE SOUSA, GEAN J. M. ; HELDWEIN, MARCELO L. . Modular multilevel converter control strategy for future DC subsea electric transmission and distribution systems. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference. p. 100.

• SOEIRO, THIAGO B. ; HELDWEIN, MARCELO L. ; Kolar, Johann W. . Three-phase modular multilevel current source rectifiers for electric vehicle battery charging systems. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference. p. 623.

• JAPPE, TIAGO K. ; POLLA, RAMIRO R. ; SOEIRO, THIAGO B. ; FUERBACK, ANDRE ; HELDWEIN, MARCELO L. ; ANDRICH, ROBERTO . An FPGA-based single-phase interleaved boost-type PFC converter employing GaN HEMT devices. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference. p. 1324.

• BEZERRA, PEDRO A. M. ; HELDWEIN, MARCELO L. . Generation of hybrid carrier based modulation patterns. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference. p. 183.

• BARRETO, LUIZ H. S. C. ; DE S. OLIVEIRA, DEMERCIL ; PRACA, PAULO P. ; SILVA, RANOYCA N. A. L. ; HELDWEIN, MARCELO L. . Five-level hybrid half-bridge/ANPC back-to-back converter. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference. p. 259.

• SOEIRO, THIAGO B. ; MAIA, GEAN J. ; ORTMANN, M. S. ; HELDWEIN, MARCELO L. . High efficiency three-phase unidirectional bucktype PFC rectifier concepts. In: IECON 2013 39th Annual Conference of the IEEE Industrial Electronics Society, 2013, Vienna. IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. p. 7763.

• DE SOUSA, GEAN J. M. ; HELDWEIN, MARCELO L. . Modular multilevel converter based unidirectional medium/high voltage drive system. In: IECON 2013 39th Annual Conference of the IEEE Industrial Electronics Society, 2013, Vienna. IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. p. 1037.

• SOEIRO, THIAGO B. ; HELDWEIN, MARCELO L. . High efficiency Indirect Matrix Converter topologies. In: IECON 2013 39th Annual Conference of the IEEE Industrial Electronics Society, 2013, Vienna. IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. p. 4856.

• LAGO, JACKSON ; SOUSA, GEAN J. M. ; HELDWEIN, MARCELO L. . Digital control/modulation platform for a modular multilevel converter system. In: 2013 Brazilian Power Electronics Conference (COBEP 2013), 2013, Gramado. 2013 Brazilian Power Electronics Conference, 2013. p. 271.

• MOIA, JOABEL ; PERIN, ARNALDO J. ; HELDWEIN, MARCELO L. . Three-level/-phase PWM converters DC-link voltages ripple reduction technique in the reference frame. In: 2012 IEEE Applied Power Electronics Conference and Exposition APEC 2012, 2012, Orlando. 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC). p. 740.

• Moia, J. ; Lago, J. ; Perin, A. J. ; Heldwein, M. L. . Comparison of three-phase PWM rectifiers to interface Ac grids and bipolar Dc active distribution networks, 2012.

• COLLIER, DANIEL A. F. ; ORTMANN, MARCIO S. ; HELDWEIN, MARCELO L. . Current self-control applied to sensorless permanent magnet synchronous generators. In: 2012 XXth International Conference on Electrical Machines (ICEM), 2012, Marseille. 2012 XXth International Conference on Electrical Machines. p. 886.

• Jappe, T. K. ; HELDWEIN, M.L. ; Mussa, S. A. . A Model Development of Indirect Matrix Converter based on Active Power Theory. In: Power Electronics South America 2012, 2012, São Paulo, SP. Proceedings of the Power Electronics South America 2012, 2012.

• Dupczak, B. S. ; Perin, A.J. ; HELDWEIN, M.L. . PMSM Specification and Design for an Electrical Boat Propulsion System. In: Power Electronics South America 2012, 2012, São Paulo, SP. Proceedings of the Power Electronics South America 2012, 2012.

• DUPCZAK, BRUNO S. ; HELDWEIN, MARCELO L. ; PERIN, ARNALDO J. ; MARTINS, CARLOS A. ; CROS, JEROME . PMSM and 5-level CSI based boat electrical propulsion system efficiency analysis. In: 2012 IEEE Vehicle Power and Propulsion Conference (VPPC), 2012, Seoul. 2012 IEEE Vehicle Power and Propulsion Conference. p. 538.

• POSTIGLIONE, CICERO S. ; COLLIER, DANIEL A. F. ; DUPCZAK, BRUNO S. ; HELDWEIN, MARCELO L. ; PERIN, ARNALDO J. . Propulsion system for an all electric passenger boat employing permanent magnet synchronous motors and modern power electronics. In: 2012 Electrical Systems for Aircraft, Railway and Ship Propulsion (ESARS), 2012, Bologna. 2012 Electrical Systems for Aircraft, Railway and Ship Propulsion. p. 1.

• HAFFEMAN, T. E. ; BARBOSA JR., J. R. ; HELDWEIN, M.L. ; Lago, J. . Direct immersion cooling of a frequency inverter using a R-134a two-phase thermosyphon. In: 3o Encontro Brasileiro sobre Ebulição, Condensação e Escoamentos Multifásicos, 2012, Curitiba. Anais do 3o Encontro Brasileiro sobre Ebulição, Condensação e Escoamentos Multifásicos, 2012.

• Dupczak, B. S. ; HELDWEIN, M.L. ; Perin, A.J. . Space vector modulation strategy applied to interphase transformers-based five-level current source inverters for electric propulsion. In: 14th European Conference on Power Electronics and Applications (EPE 2011), 2011, Birmingham, UK. Proceedings of the 14th European Conference on Power Electronics and Applications (EPE 2011), 2011.

• Jappe, T. K. ; Mussa, S. A. ; HELDWEIN, M.L. ; RUIZ-CABALLERO, D. A. ; Paredes, C. . A current symmetrical hybrid multilevel dc-ac converter. In: 14th European Conference on Power Electronics and Applications (EPE 2011), 2011, Birmingham, UK. Proceedings of the 14th European Conference on Power Electronics and Applications (EPE 2011), 2011.

• Jappe, T. K. ; Mussa, S. A. ; HELDWEIN, M.L. ; RUIZ-CABALLERO, D. A. ; Castillo, A. . Space vector modulation scheme to minimize common-mode voltage generated by a three-phase hybrid multilevel inverter. In: 14th European Conference on Power Electronics and Applications (EPE 2011), 2011, Birmingham, UK. Proceedings of the 14th European Conference on Power Electronics and Applications (EPE 2011), 2011.

• Collier, D. A. F. ; Maryama, V. ; HELDWEIN, M.L. . Low Conduction Losses PWM Rectifier for High Efficiency Wind Power Micro-Generation. In: PCIM Asia 2011 - International Conference & Exhibition for Power Electronics, Intelligent Motion, Power Quality, 2011, Shanghai, CH. PCIM Asia 2011 - International Conference & Exhibition for Power Electronics, Intelligent Motion, Power Quality, 2011.

• Collier, D. A. F. ; HELDWEIN, M.L. . Modeling and design of a micro wind energy system with a variable-speed wind turbine connected to a permanent magnet synchronous generator and a PWM rectifier. In: Congresso Brasileiro de Eletrônica de Potência (COBEP 2011), 2011, Natal. Anais do Congresso Brasileiro de Eletrônica de Potência (COBEP 2011), 2011.

• TAHIM, ANDRE P. N. ; PAGANO, DANIEL J. ; HELDWEIN, MARCELO L. ; PONCE, ENRIQUE . Control of interconnected power electronic converters in dc distribution systems. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 269.

• JAPPE, TIAGO KOMMERS ; Mussa, Samir Ahmad ; Heldwein, Marcelo Lobo . Analysis of indirect matrix converter topologies in voltage step-up operation mode. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 930.

• RUIZ-CABALLERO, DOMINGO ; SANHUEZA, RENE ; ARANCIBIA, SEBASTIAN ; LOPEZ, MIGUEL ; Mussa, Samir Ahmad ; Heldwein, Marcelo Lobo . Symmetrical hybrid multilevel inverter concept based on multi-state switching cells. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 776.

• LANGE, ANDRE DE BASTIANI ; Heldwein, Marcelo Lobo . Light load stability improvement for single-phase boost PFC rectifier using input current self-control technique. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 61.

• ORTMANN, M. S. ; Mussa, S. A. ; HELDWEIN, M.L. . Generalized Analysis of a Multi-State Switching Cells-Based Single-Phase Multilevel PFC Rectifier. In: Congresso Brasileiro de Eletrônica de Potência (COBEP 2011), 2011, Natal. Anais do Congresso Brasileiro de Eletrônica de Potência (COBEP 2011), 2011.

• MOIA, JOABEL ; PERIN, ARNALDO J. ; HELDWEIN, MARCELO L. . Neutral point clamped converter DC-link center point current analysis in the dq0 reference frame. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 121.

• BATSCHAUER, ALESSANDRO L. ; MUSSA, SAMIR A. ; HELDWEIN, MARCELO L. . Comparison between a hybrid multilevel converter employing half-bridge modules and a hybrid multilevel converter employing H-Bridge modules. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 768.

• Silva, R. N. A. L. ; BARRETO, L. H. S. C. ; OLIVEIRA, D. S ; Henn, G. A. L. ; Praca, P. P. ; Heldwein, M. L. ; MUSSA, S.A. . Five-level hybrid converter based on a Half-Bridge/ANPC cell. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 898.

• Callegaro, A. D. ; ORTMANN, M. S. ; Mussa, S. A. ; Heldwein, M. L. . Power semiconductor switching losses experimental characterization system. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 1062.

• ORTMANN, M. S. ; Mussa, S. A. ; Heldwein, M. L. . Evaluation of carrier-based PWM strategies for multi-state switching cells-based multilevel three-phase rectifiers. In: 2011 Brazilian Power Electronics Conference (COBEP 2011), 2011, Natal. XI Brazilian Power Electronics Conference. p. 903.

• ORTMANN, MARCIO S. ; MUSSA, SAMIR A. ; HELDWEIN, MARCELO L. . HF voltage generation in a multi-state switching cells-based single-phase multilevel PFC rectifier. In: 2011 IEEE Energy Conversion Congress and Exposition (ECCE), 2011, Phoenix. 2011 IEEE Energy Conversion Congress and Exposition. p. 3773-3777.

• LAGO, JACKSON ; MOIA, JOABEL ; HELDWEIN, MARCELO L. . Evaluation of power converters to implement bipolar DC active distribution networks ? DC-DC converters. In: 2011 IEEE Energy Conversion Congress and Exposition (ECCE), 2011, Phoenix. 2011 IEEE Energy Conversion Congress and Exposition. p. 985-990.

• ORTMANN, M. ; Tibola, G. ; Callegaro, A. D. ; Mussa, Samir Ahmad ; HELDWEIN, M.L. ; GOMES, C. E. . Interligação de um Gerador Eólico com a Rede Elétrica. In: VI Congresso de Inovação Tecnológica em Energia Elétrica (Citenel), 2011, Fortaleza, CE. Anais do VI Congresso de Inovação Tecnológica em Energia Elétrica (CITENEL) e II Seminário de Eficiência Energética no Setor Elétrico (SEENEL), 2011.

• BATSCHAUER, A. L. ; Perin, A.J. ; Mussa, S. A. ; HELDWEIN, M.L. . Evaluation of the hybrid four-level converter employing half-bridge modules for two different modulation schemes. In: Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2010, Palm Springs, EUA. Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE, 2010.

• HEERDT, JOSELITO A. ; MUSSA, SAMIR A. ; HELDWEIN, MARCELO L. . Semiconductors current efforts and losses evaluation for single-phase three-level regenerative PWM rectifiers. In: 2010 IEEE International Symposium on Industrial Electronics (ISIE 2010), 2010, Bari. 2010 IEEE International Symposium on Industrial Electronics. p. 1046.

• Carmo Jr., J.R. ; Antunes, F.L.M. ; HELDWEIN, M.L. ; Mussa, S. A. . Uma Proposta para Cálculo dos Esforços de Corrente em um Inversor Multinível do Tipo NPC Baseado na Modulação POD. In: XVIII Congresso Brasileiro de Automática, 2010, Bonito, MS. XVIII Congresso Brasileiro de Automática, 2010. p. 3134-3139.

• RUIZ-CABALLERO, DOMINGO ; SANHUEZA, RENE ; VERGARA, HECTOR ; LOPEZ, MIGUEL ; Heldwein, Marcelo Lob ; Mussa, Samir Ahmad . Cascaded Symmetrical Hybrid Multilevel Dc-Ac converter. In: 2010 IEEE Energy Conversion Congress and Exposition (ECCE), 2010, Atlanta. 2010 IEEE Energy Conversion Congress and Exposition, 2010. p. 4012.

• HELDWEIN, M.L. ; ORTMANN, M. S. ; Mussa, S. A. . Single-phase PWM Boost-type unidirectional rectifier doubling the switching frequency. In: 13th European Conference on Power Electronics and Applications (EPE '09), 2009, Barcelona. 13th European Conference on Power Electronics and Applications (EPE '09), 2009. p. 1-10.

• ORTMANN, M.S. ; MUSSA, S.A. ; HELDWEIN, M.L. . Concepts for high efficiency single-phase three-level PWM rectifiers. In: 2009 IEEE Energy Conversion Congress and Exposition. ECCE 2009, 2009, San Jose. 2009 IEEE Energy Conversion Congress and Exposition. p. 3768-3775.

• BATSCHAUER, ALESSANDRO L. ; HELDWEIN, MARCELO L. ; MUSSA, SAMIR A. ; PERIN, ARNALDO J. . Hybrid multilevel converter employing half-bridge modules. In: 2009 Brazilian Power Electronics Conference (COBEP), 2009, Bonito-Mato Grosso do Sul. 2009 Brazilian Power Electronics Conference. p. 369-376.

• ORTMANN, MARCIO S. ; MUSSA, SAMIR A. ; HELDWEIN, MARCELO L. . Theoretical analysis of a single-phase three-level PFC converter employing multi-state switching cells. In: 2009 Brazilian Power Electronics Conference (COBEP), 2009, Bonito-Mato Grosso do Sul. 2009 Brazilian Power Electronics Conference. p. 1185-1192.

• BORGONOVO, DEIVIS ; HELDWEIN, MARCELO L. ; MUSSA, SAMIR A. . Application of the NIOS II processor-FPGA on the digital control of a single-phase PFC rectifier. In: 2008 11th Workshop on Control and Modeling for Power Electronics (COMPEL), 2008, Zurich. 2008 11th Workshop on Control and Modeling for Power Electronics. p. 1.

• Karutz, P. ; ROUND, S. ; HELDWEIN, M.L. ; KOLAR, J.W. . Ultra Compact Three-phase PWM Rectifier. In: 22nd IEEE Applied Power Electronics Conference, 2007, Anaheim (CA). Proceedings of the 22nd IEEE Applied Power Electronics Conference, 2007. v. 1. p. 816-822.

• KOLAR, J. W. ; Drofenik, U. ; BIELA, J. ; Heldwein, M. L. ; ERTL, H. ; FRIEDLI, T. ; ROUND, S. D. . PWM Converter Power Density Barriers. In: 2007 Power Conversion Conference Nagoya, 2007, Nagoya. 2007 Power Conversion Conference - Nagoya. v. CD-ROM. p. P-9.

• MUSING, A. ; Heldwein, M. L. ; FRIEDLI, T. ; KOLAR, J. W. . Steps Towards Prediction of Conducted Emission Levels of an RB-IGBT Indirect Matrix Converter. In: 2007 Power Conversion Conference Nagoya, 2007, Nagoya. 2007 Power Conversion Conference - Nagoya. v. CD-ROM. p. 1181.

• ROUND, S. D. ; Karutz, P. ; Heldwein, M. L. ; KOLAR, J. W. . Towards a 30 kW/liter, Three-Phase Unity Power Factor Rectifier. In: 2007 Power Conversion Conference Nagoya, 2007, Nagoya. 2007 Power Conversion Conference - Nagoya. v. CD-ROM. p. 1251.

• HELDWEIN, M.L. ; KOLAR, J.W. . Extending Winding Capacitance Cancellation to Three-Phase Power Filter Networks. In: IEEE EMC Symposium 2007, 2007, Honolulu, HI. Proceedings of the IEEE EMC Symposium 2007, 2007.

• HELDWEIN, M.L. ; KOLAR, J.W. . Design of Minimum Volume Input Filters for an Ultra Compact Three-Phase PWM Rectifier. In: COBEP'07 - Congresso Brasileiro de Eletrônica de Potência, 2007, Blumenau. Proceedings of the 9th Brazilian Power Electronics Conference (COBEP'07), 2007. v. CD-ROM.

• NUSSBAUMER, T. ; HELDWEIN, M.L. ; KOLAR, J.W. . Common Mode EMC Input Filter Design for a Three-Phase Buck-Type PWM Rectifier System. In: 21st Annual IEEE Applied Power Electronics Conference and Exposition, 2006, Dallas (TX). Proceedings of the 21st Annual IEEE Applied Power Electronics Conference and Exposition, 2006. v. 3. p. 1617-1623.

• BIELA, J. ; Wirthmueller, A. ; Waespe, R. ; HELDWEIN, M.L. ; Waffenschmidt, E. ; KOLAR, J.W. . Passive and Active Hybrid Integrated EMI FIlters. In: 21st Annual IEEE Applied Power Electronics Conference and Exposition, 2006, Dallas (TX). Proceedings of the 21st Annual IEEE Applied Power Electronics Conference and Exposition, 2006. v. 2. p. 1174-1180.

• HELDWEIN, M.L. ; ERTL, H. ; BIELA, J. ; KOLAR, J.W. . Implementation of a Transformer-Less Common Mode Active Filter for Off-Line Converter Systems. In: 21st Annual IEEE Applied Power Electronics Conference and Exposition, 2006, Dallas (TX). Proceedings of the 21st Annual IEEE Applied Power Electronics Conference and Exposition, 2006. v. 2. p. 1230-1236.

• FRIEDLI, T. ; HELDWEIN, M.L. ; GIEZENDANNER, F. ; KOLAR, J.W. . A High Efficiency Indirect Matrix Converter Utilizing RB-IGBTs. In: 37th Power Electronics Specialists Conference, 2006, Jeju. Proceedings of the 37th Power Electronics Specialists Conference, 2006.

• MINO, K. ; HELDWEIN, M.L. ; KOLAR, J.W. . Ultra Compact Three-Phase Rectifier with Electronic Smoothing Inductor. In: 20th Annual IEEE Applied Power Electronics Conference and Exposition, 2005, Austin (TX). Proceedings of the 20th Annual IEEE Applied Power Electronics Conference and Exposition, 2005. v. 1. p. 522-528.

• HELDWEIN, M.L. ; NUSSBAUMER, T. ; Beck, F. ; KOLAR, J.W. . Novel Three-Phase CM/DM Conducted Emissions Separator. In: 20th Annual IEEE Applied Power Electronics Conference and Exposition, 2005, Austin (TX). Proceedings of the 20th Annual IEEE Applied Power Electronics Conference and Exposition, 2005. v. 2. p. 797-802.

• ROUND, S. ; Schafmeister, F. ; HELDWEIN, M.L. ; PEREIRA, E. ; SERPA, L. ; KOLAR, J.W. . Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End. In: 2005 IEEE Industry Applications Conference, 2005, Hong Kong. 2005 International Power Electronics Conference (IPEC'05), 2005.

• NUSSBAUMER, T. ; HELDWEIN, M.L. ; GONG, G. ; KOLAR, J.W. . Prediction Techniques Compensating Delay Times Caused by Digital Control of a Three-Phase Buck-Type PWM Rectifier System. In: 4th International Power Electronics and Motion Control Conference, 2005, Hong Kong. Conference Record of the 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting (IAS'05), 2005.

• NUSSBAUMER, T. ; GONG, G. ; HELDWEIN, M.L. ; KOLAR, J.W. . Control-Oriented Modeling and Robust Control of a Three-Phase Buck+Boost PWM Rectifier (VRX-4). In: 2005 IEEE Industry Applications Conference, 2005, Hong Kong. Conference Record of the 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting (IAS'05), 2005.

• ROUND, S. ; HELDWEIN, M.L. ; KOLAR, J.W. ; HOFSAJER, I. ; FRIEDRICHS, P. . A SiC JFET Driver for a 5 kW, 150 kHz Three-Phase Sinusoidal-Input, Sinusoidal-Output PWM Converter. In: 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting (IAS'05), 2005, Hong Kong. Conference Record of the 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting (IAS'05), 2005. v. CD ROM.

• HELDWEIN, M.L. ; KOLAR, J.W. . A Novel SiC J-FET Gate Drive Circuit for Sparse Matrix Converter Applications. In: 19th Annual IEEE Applied Power Electronics Conference and Exposition, 2004, Anaheim (CA). Proceedings of the 19th Annual IEEE Applied Power Electronics Conference and Exposition, 2004. v. 1. p. 116-121.

• GONG, G. ; HELDWEIN, M.L. ; Drofenik, U. ; MINO, K. ; KOLAR, J.W. . Comparative Evaluation of Three-Phase High Power Factor AC-DC Coverter Concepts for Application in Future More Electric Aircrafts. In: 19th Annual IEEE Applied Power Electronics Conference and Exposition, 2004, Anaheim (CA). Proceedings of the 19th Annual IEEE Applied Power Electronics Conference and Exposition, 2004. v. 2. p. 1152-1159.

• HELDWEIN, M.L. ; NUSSBAUMER, T. ; KOLAR, J.W. . Differential Mode EMC Input Filter Design for Three-Phase AC-DC-AC Sparse Matrix PWM Converters. In: 35th IEEE Power Electronics Specialists Conference, 2004, Aachen. Proceedings of the 35th IEEE Power Electronics Specialists Conference, 2004.

• NUSSBAUMER, T. ; HELDWEIN, M.L. ; KOLAR, J.W. . Differential Mode EMC Input Filter Design for a Three-Phase Buck-Type Unity Power Factor PWM Rectifier. In: 4th International Power Electronics and Motion Control Conference, 2004, Xian. Proceedings of the 4th International Power Electronics and Motion Control Conference, 2004. v. 3. p. 1521-1526.

• HELDWEIN, M.L. ; SOUZA, A. F. ; BARBI, I. . Unidade Retificadora de Alto Desempenho de 60V/6A Utilizando Técnicas de Redução de Perdas. In: CININTEL 2000 - III International Telecommunications Infrastructure Congress, 2000, Florianópolis. Congress Records of the III International Telecommunications Infrastructure Congress, 2000. v. 1. p. 407-419.

• HELDWEIN, M.L. ; SOUZA, A. F. ; BARBI, I. . A Primary Side Clamping Circuit Applied to the ZVS-PWM Asymmetrical Half-Bridge Converter. In: 31st IEEE Power Electronics Specialists Conference - PESC'00, 2000, Galway. Proceedings of the 31st IEEE Power Electronics Specialists Conference - PESC'00. Piscataway, NJ: IEEE Press, 2000. v. 1. p. 199-204.

• HELDWEIN, M.L. ; SOUZA, A. F. ; BARBI, I. . Three-Phase Rectifier Unit for Telecommunication Applications Using Single-Phase Rectifier Modules. In: COBEP'99 - Congresso Brasileiro de Eletrônica de Potência, 1999, Foz do Iguaçu. Anais do 5o Congresso Brasileiro de Eletrônica de Potência, 1999. v. 1. p. 235-240.

• HELDWEIN, M.L. ; SOUZA, A. F. ; BARBI, I. . A Simple Control Strategy Applied To Three-Phase Rectifier Units For Telecommunication Applications. In: 30th Annual IEEE Power Electronics Specialists Conference, 1999, Charleston. Porceedings of the 30th Annual IEEE Power Electronics Specialists Conference. Piscataway, NJ: IEEE Press, 1999. v. 2. p. 795-800.

• HELDWEIN, M.L. ; SOUZA, A. F. ; BARBI, I. . Unidade Retificadora Trifásica para Aplicações em Telecomunicações Utilizando Módulos Retificadores Monofásicos. In: Seminário de Eletrônica de Potência - 1998, 1998, Florianópolis. SEP'98, 1998. p. 68-73.

• HELDWEIN, M.L. . Tecnologias de Conversores Eletrônicos de Energia Aplicados em Smart Grid. 2013. (Apresentação de Trabalho/Conferência ou palestra).

• HELDWEIN, M.L. . Tecnologias de Conversores Eletrônicos de Energia Aplicados em Smart Grid. 2013. (Apresentação de Trabalho/Conferência ou palestra).

• HELDWEIN, M.L. . Microrredes e Redes de Distribuição Ativas no Contexto Smart Grid. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• HELDWEIN, M.L. . Microrredes e Eletrônica de Potência no Contexto Smart Grid. 2012. (Apresentação de Trabalho/Outra).

• MUESING, A. ; HELDWEIN, M.L. . Multi-Domain Simulations in Power Electronics: Combining Circuit Simulation, Electromagnetic and heat transfer. 2011. (Apresentação de Trabalho/Congresso).

• Heldwein, Marcelo Lobo . Distribuição em CC para Integração de Fontes Distribuídas. 2010. (Apresentação de Trabalho/Conferência ou palestra).

• HELDWEIN, M.L. . Especulando Sobre o Futuro: Distribuição em Corrente Contínua para Integração de Fontes Distribuídas. 2010. (Apresentação de Trabalho/Seminário).

• HELDWEIN, M.L. ; KOLAR, J.W. . Design of a high performance three-phase CM/DM noise separator for conducted emissions testing. 2006. (Apresentação de Trabalho/Seminário).

• Heldwein, Marcelo Lobo . EMC Filtering of Three-Phase PWM Converters. Zurique: ETH Zurich, 2007 (Tese de Doutorado).

• Heldwein, Marcelo Lobo . Unidade Retificadora Trifásica de Alta Potência e Alto Desempenho para Aplicação em Centrais de Telecomunicações. Florianópolis 1999 (Dissertação de Mestrado).

Outras produções

Projetos de pesquisa

• 2019 - Atual

  Desenvolvimento de Módulos de Potência para uma Estação de Recarga Rápida para Veículos Elétricos, Descrição: Desenvolvimento de Módulos de Potência para uma Estação de Recarga Rápida para Veículos Elétricos. , Situação: Em andamento; Natureza: Pesquisa. , Alunos envolvidos: Mestrado acadêmico: (1) Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Eduardo Valmir de Souza - Integrante / André Luis Kirsten - Integrante / Bruno Bertoldi - Integrante / GRABOVSKI, E. F. C. - Integrante.

• 2016 - Atual

  Modelagem e estratégia de controle de um sistema de acionamento elétrico submarino baseado em máquina elétrica de ímãs permanentes quando alimentada através de umbilical de potência, transformador e inversor multiníveis, Situação: Em andamento; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (2) / Mestrado acadêmico: (2) / Doutorado: (2) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Daniel Ferreira Coutinho - Integrante / PERIN, ARNALDO J. - Integrante / Marcos José Jacoboski - Integrante / Esio Eloi dos Santos Filho - Integrante / Thiago Fonseca Rech - Integrante / Eduardo da Silva Pino - Integrante / Lúcio Steckling - Integrante / Marcos Paulo Moccelini - Integrante., Financiador(es): Petróleo Brasileiro - Rio de Janeiro - Matriz - Cooperação.

• 2014 - 2016

  Inversores de Alto Rendimento para Conexão com a Rede Em Aplicações sem Transformadores, Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (1) / Doutorado: (2) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / DE SOUSA, GEAN JACQUES MAIA - Integrante / Jacson Luis de Oliveira - Integrante / Gustavo Pereira - Integrante., Financiador(es): WEG - Matriz - Cooperação.

• 2011 - 2017

  Desenvolvimento e implantação de estratégias de controle para o gerenciamento de energia e integração de sistemas de geração distribuída em micro-redes inteligentes, Descrição: Pesquisar, definir e desenvolver estratégias de controle para o gerenciamento energético e integração de sistemas de geração distribuída em micro-redes eficientes, modernas, confiáveis e economicamente convenientes. Implantar e validar os conceitos desenvolvidos em um sistema/micro-rede piloto a ser instalado nas dependências da UFSC, no edifício do Instituto de Eletrônica de Potência ? INEP (com base infraestrutura pré-existente). , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (6) / Mestrado acadêmico: (4) / Doutorado: (3) . , Integrantes: Marcelo Lobo Heldwein - Integrante / Samir Ahmad Mussa - Integrante / Denizar Cruz Martins - Integrante / Cesare Quinteiro Pica - Coordenador / Erlon Cristian Finardi - Integrante / Daniel Juan Pagano - Integrante / ORTMANN, MARCIO S. - Integrante / Luiz Juarez Camurça - Integrante / ANDRETA, ANDRE G. - Integrante / Roberto Francisco Coelho - Integrante / Lucas Munaretto - Integrante / Daniela Dantas da Silva - Integrante., Número de produções C, T & A: 4

• 2011 - 2015

  Estudos de Planejamento do Sistema de Transmissão e Distribuição Elétrica Submarina, Descrição: Este projeto tem por objetivo avaliar diferentes configurações para o Sistema de Transmissão e Distribuição Elétrica Submarina (STDES) de forma a apontar a mais adequada para cada cenário estudado. Os objetivos específicos são: - Realizar a modelagem e as simulações necessárias para o dimensionamento de forma correta e robusta de todo o STDES considerando as opções em Corrente Alternada (C.A.) e Corrente Contínua (C.C.). - Analisar, por meio de estudos elétricos em regime permanente e transitório, as opções de topologia para o STDES de forma a se prever os comportamentos do sistema durante operação normal (partidas e regime) e sob condições de falhas. - Estabelecer as premissas básicas, isto é, as especificações técnicas preliminares, dos principais equipamentos do STDES. - Determinação dos requisitos básicos para implementação dos sistemas de monitoração, controle e proteção do STDES. - Propor estratégias de controle e proteção adequados de acordo com as topologias definidas para o sistema de aterramento. - Fazer uma comparação entre as soluções C.A. e C.C. destacando as vantagens técnicas e econômicas de cada configuração.. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (6) / Mestrado acadêmico: (3) / Doutorado: (3) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Enio Valmor Kassick - Integrante / Maurício Valencia Ferreira da Luz - Integrante / Arnaldo José Perin - Integrante / Márcio Silveira Ortmann - Integrante / Jackson Lago - Integrante / Yales Rômulo de Novaes - Integrante / Ildemar Cassana Decker - Integrante / Aguinaldo Silveira e Silva - Integrante / Gean Jacques Maia de Sousa - Integrante / Thiago Batista Soeiro - Integrante / HOFFMANN, WAGNER - Integrante / Cássio Maraffon - Integrante., Número de produções C, T & A: 6

• 2011 - 2013

  Projeto e construção de um protótipo de Retificador monofásico com correção ativa do fator de potência para sistema de refrigeração, Descrição: O objetivo desta atividade de pesquisa é o projeto e construção de um protótipo de retificador monofásico com correção ativa do fator de potência (PFC) para a alimentação de sistemas de acionamento elétrico de compressores empregados em sistemas de refrigeração. A topologia do retificador deve ser ?BOOST em Condução Contínua?, empregando soluções clássicas e pensando-se na utilização de dispositivos semicondutores de nitreto de gálio (GaN).. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (1) / Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Tiago Kommers Jappe - Integrante / Ramiro Ribeiro Polla - Integrante.

• 2010 - 2013

  Controle de Conversores Trifásicos Conectados à Geradores Eólicos a Ímãs Permanentes, Descrição: O primeiro objetivo deste trabalho é descrever e modelar os principais componentes do sistema eólico para fins de simulação e controle da MSIP e dos conversores estáticos. Serão expostos os componentes da turbina eólica responsáveis pela conversão da energia cinética dos ventos em energia cinética no rotor eólico, as formas de controlar e proteger a turbina quando atingi-se o limite máximo de extração de potência e o modelo matemático da turbina. Em seguida, estudam-se os perfis de vento para simulação de condições mais realísticas. A máquina síncrona a ímãs permanentes é apresentada e são derivados os modelos para estudo dinâmico e em regime permanentes do gerador e também do retificador PWM ativo utilizado. A aplicação do retificador ativo para controle da máquina, permite o emprego de técnicas avançadas de controle e como resultado tem-se um alto desempenho do gerador. As técnicas que podem ser empregadas são derivadas das vastas aplicações de controle de motores já consolidadas no mercado, duas técnicas de alto desempenho destacam-se nesse cenário: o controle por campo orientado e o controle direto de torque. Ambas as técnicas serão analizadas e será proposta uma forma eficiente de implementar o controle do fluxo de energia em um sistema gerador. Feitas as análise teóricas com todas as simulações numéricas necessárias, o estudo será seguido de implementação prática em laboratório.. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (1) / Mestrado acadêmico: (1) / Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Victor Maryama - Integrante / COLLIER, DANIEL A. F. - Integrante / ORTMANN, MARCIO S. - Integrante., Financiador(es): Conselho Nacional de Desenvolvimento Científico e Tecnológico - Bolsa / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Bolsa / Universidade Federal de Santa Catarina - Bolsa., Número de produções C, T & A: 1

• 2010 - 2013

  Redistribuidor de Correntes para Redes de Distribuição em Corrente Contínua Bipolares, Descrição: O crescente número de cargas eletrônicas que possuem como estágio inicial um conversor CA-CC (muitas vezes apenas um retificador a diodos) tanto em instalações industriais, comerciais, quanto em residenciais e a grande preocupação relacionada à eficiência energética fez muitos pesquisadores reavaliarem a viabilidade de uma rede de distribuição em corrente contínua. Estas redes proporcionariam uma redução nas perdas do sistema além de proporcionar maior capacidade de transmissão de energia, maior facilidade de controle e de interligação com sistemas de armazenamento e geração distribuída de energia. Duas configurações de redes de distribuição em baixa tensão foram propostas e avaliadas até então: a configuração monopolar (dois fios) e a bipolar (três fios). A configuração bipolar apresenta vantagens no que diz respeito à capacidade de transmissão de energia, perdas nas linhas e confiabilidade do sistema. Em sistemas de transmissão bipolares obtêm-se a minimização das perdas nas linhas dos alimentadores quando as correntes na linha positiva e negativa são iguais. Com isso, com o intuito de minimizar as perdas do sistema, pode-se inserir na rede um componente que tem a função de redistribuir as correntes das linhas. Este redistribuidor de correntes é um conversor eletrônico inserido em paralelo com rede, entre um grupo significativo de cargas e o alimentador da rede.. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Jackson Lago - Integrante., Financiador(es): Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Bolsa., Número de produções C, T & A: 5

• 2010 - Atual

  Microrrede em Corrente Contínua, Descrição: Duas condições parecem constituir um dos possíveis cenários para o futuro do fornecimento de energia. Quais sejam, o consumo final sendo dominado por equipamentos alimentados em corrente contínua e a inclusão de fontes para cogeração distribuída de energia próximas aos centros de consumo. Aliadas a estas, está uma terceira, que é a possibilidade de utilização de cargas e fontes "inteligentes" capazes de se comunicar com a rede de distribuição para saberem quando podem operar e quando devem ser desligadas. Contudo, antes destas definições, torna-se imperativo avaliar estas tecnologias sob todos os aspectos possíveis. Este trabalho pretende discutir alguns dos aspectos relativos à eficiência, confiabilidade e desafios relativos à proteção de sistemas de distribuição ativa em corrente contínua, bem como propor dispositivos que possam melhorar o desempenho de tais sistemas. Em específico, pretende-se analisar conversores estáticos capazes de realizar a operação estável e segura de uma microrrede em corrente contínua que integre recursos de armazenamento, microgeração e cargas (ativas e passivas) e opere tanto conectada à rede comercial CA quanto em modo de ilhamento. Especial atenção será dada ao retificador que fará a interface entre as duas redes, uma vez que poucos estudos existem na literatura sobre esta aplicação específica.. , Situação: Em andamento; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (1) / Mestrado acadêmico: (1) / Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Arnaldo José Perin - Integrante / Jackson Lago - Integrante / Joabel Moia - Integrante / Wagner Hoffmann - Integrante., Financiador(es): Conselho Nacional de Desenvolvimento Científico e Tecnológico - Auxílio financeiro., Número de produções C, T & A: 3

• 2009 - 2010

  Conversor para Interligação de um Gerador Eólico com a Rede Elétrica, Descrição: Projeto: 0567-004/2007 - CELESC P&D. Desenvolvimento de um sistema de conversores estáticos trifásicos para co-geração de energia elétrica à partir de um aerogerador de fluxo axial à ímã permanente.. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (1) / Mestrado acadêmico: (1) / Doutorado: (3) . , Integrantes: Marcelo Lobo Heldwein - Integrante / Samir Ahmad Mussa - Coordenador / Márcio Silveira Ortmann - Integrante / Gabriel Tibola - Integrante / Eduardo Valmir de Souza - Integrante / Romero Leandro Andersen - Integrante., Financiador(es): CELESC Geração - Auxílio financeiro.

• 2009 - 2010

  Fonte de Alimentação Isolada de Alto Desempenho, Descrição: O objetivo desta pesquisa é o projeto de um sistema de conversores estáticos para o carregamento de baterias em corrente contínua à partir de uma rede trifásica em corrente alternada. O sistema em CC será composto basicamente por duas fontes independentes, compostas, cada uma, de uma bateria de acumuladores e carregadores-retificadores, que alimentam inversores.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Marcelo Lobo Heldwein - Integrante / Samir Ahmad Mussa - Coordenador., Financiador(es): Cebra Conversores Estáticos Brasileiros - Cooperação.

• 2008 - 2015

  Retificadores de Alto Rendimento Utilizando Células de Comutação de Múltiplos Estados, Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Graduação: (2) / Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Ivo Barbi - Integrante / Samir Ahmad Mussa - Integrante / Márcio Silveira Ortmann - Integrante.

• 2008 - 2011

  Novas Topologias para Conversores Estáticos Multiníveis, Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Samir Ahmad Mussa - Integrante / Arnaldo José Perin - Integrante / Alessandro Luiz Batschauer - Integrante.

• 2008 - 2011

  Contribuição à Tecnologia de Conversores Estáticos Bem Adaptados às Especificações de Futuras Aeronaves, Descrição: Este trabalho pretender acessar alguns dos desafios para a Eletrônica de Potência criados pela iniciativa MEA, mais especificamente contribuir na definição e proposição de topologias de conversores estáticos trifásicos adequadas à aplicação em sistemas aeronáuticos, focando-se em seu rendimento, densidade de potência e tolerância à falhas. Objetivos: Gerar tecnologia Brasileira na área de conversores estáticos para a indústria aeronáutica. Otimizar tais conversores através de técnicas de otimização analítica e numérica com foco na redução de volume e peso. Analisar o impacto dos filtros para compatibilidade eletromagnética na densidade de potência de conversores trifásicos para MEA. Buscar técnicas para a melhoria dos filtros para CEM, com foco na redução do volume de componentes passivos.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Marcelo Lobo Heldwein - Coordenador / Ivo Barbi - Integrante / Samir Ahmad Mussa - Integrante.

• 2006 - 2008

  High Density Power Electronics for FC- and ICE-Hybrid Electric Vehicle Powertrains (HOPE), Descrição: According to the "Joint Call on component development and system integration of hydrogen and fuel cells for transportation and other applications" the main aim is to develop generic technology and modular systems - built up from components that can be manufactured in essentially similar configurations, but with different qualities, to meet the specific performance, lifetime and cost requirements of the different applications (e.g. FC stacks, membrane electrode assemblies, batteries, power electronics)". The project HOPE is addressing power electronics. It is based on previous EU research projects like the recently finished FP5 HIMRATE (high-temperature power modules), FP5 PROCURE (high-temperature passive components), and MEDEA+ HOTCAR (high-temperature control electronics) and other EU and national research projects. The general objectives of HOPE are: Cost reduction; meet reliability requirements; reduction of volume and weight. This is a necessity to bring the Fuel Cell (FC) hybrid vehicles and Internal Combustion Engine (ICE) hybrid vehicles to success. EU project: FP6-019848. , Situação: Em andamento; Natureza: Pesquisa. , Integrantes: Marcelo Lobo Heldwein - Integrante / Johann Walter Kolar - Integrante / Simon Round - Coordenador., Financiador(es): European Union - Auxílio financeiro., Número de produções C, T & A: 1

• 2006 - 2008

  Numerical Calculation of Parasitics and Conducted EMI of Power Converters, Descrição: Based on the PEEC (Partial Electrical Equivalent Circuit) approach, given circuit layout geometries and material properties, parasitic layout inductances and capacitances of power electronic systems are determined and included into a new circuit simulation software. In combination with a thermal modeling and simulation, and electromagnetic and thermal models of inductors, transformers and capacitors this will result in a platform allowing a detailed design (virtual prototyping) of power electronic systems. ETH project: 18506. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Doutorado: (3) . , Integrantes: Marcelo Lobo Heldwein - Integrante / Johann Walter Kolar - Integrante / Thomas Friedli - Integrante / Andreas Muesing - Coordenador., Número de produções C, T & A: 1

• 2006 - 2008

  Ultra Compact, 3-phase, 3-Level, Power Factor Corrected Rectifiers, Descrição: Highest power density and efficiency are key characteristics of all power electronics roadmaps. This thesis should demonstrate an ultra-compact 3-phase AC-DC rectifier with 20kW/liter power density. The realization will be based on latest power semiconductor technology, advanced sensing and control schemes and an overall system optimization minimizing the effort for EMI filtering and thermal management. ETH project: 18389. , Situação: Em andamento; Natureza: Pesquisa. , Alunos envolvidos: Doutorado: (2) . , Integrantes: Marcelo Lobo Heldwein - Integrante / Johann Walter Kolar - Integrante / Simon Round - Integrante / Phillip Karutz - Coordenador., Número de produções C, T & A: 2

• 2003 - 2008

  Sparse Matrix Converters Implementation Related Aspects, Descrição: Three-phase AC-AC converters, in special Sparse Matrix Converters, are being researched due to their application in the electric motor drives industry. The relatively new technology of the Sparse Matrix Converters seems to present promising characteristics allowing for a potential advance in the three-phase AC-AC energy conversion. The hardware implementation of such systems is of great importance due to the increasing demands for better performance and compliance to relevant standards. The better performance is translated to converters with higher efficiency, smaller dimensions and better dynamic behavior. With these aims the study of aspects related to the use of new semiconductor technologies allowing for higher switching frequencies and lower overall losses is to be carried out. In this project the utilization of semiconductors built with SiC is investigated paying special attention to the new challenges of this technology. Another important point is the evaluation of the Matrix Converter systems when compared with well established converter systems and this should be done through the design and hardware verification of high performance converter based on both technologies. For this type of converters the compliance to electrical systems standards should be achieved once the equipments built on this technology must be safe and do not disturb electro-magnetically the environment. Based on that, the study of the high-frequency behavior of such converters is of high interest. In this project the investigation of the main high frequency transmission mechanisms and emissions generation for these converters is to be performed and techniques for diminishing electro-magnetic emissions to be proposed. ETH project: 12692. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Mestrado acadêmico: (4) Doutorado: (4) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Johann Walter Kolar - Integrante / Thomas Nussbaumer - Integrante / Simon Round - Integrante / Frank Schafmeister - Integrante / Thomas Friedli - Integrante / Florian Giezendanner - Integrante / Olivier Stössel - Integrante / Ivana Kovacevic - Integrante / Stephan Fuchs - Integrante., Número de produções C, T & A: 23

• 2003 - 2007

  EMC Filtering of Three-Phase PWM Converters, Descrição: In modern Power Electronics systems high switching frequencies are employed to increase power density, but EMC filtering components are responsible for a large volumetric occupation of the power system. In some cases the EMC filters required to fulfill EMC regulations cover more than 30% of the total system volume. In a world where space gets expensive, the volumetric reduction of the components in EMC filters is of great importance aiming for reduced dimensions. Many studies and tools regarding the EMC of power converters have been proposed for single-phase systems, but literature on three-phase systems still lacks. Therefore, the main objective of this work is to develop techniques for modeling the generation and propagation of conducted emissions in three-phase PWM converters and propose filter design procedures which effectively attenuate the propagated noise in order to meet EMC and reduce the volume of the EMC filters. Optimizing EMC filters requires several steps to be performed, which are described here focusing in three-phase PWM converters. Electromagnetic Compatibility standards are discussed and specified according to the scope of the work. The electrical environment in which the converters are installed and tested are of great importance. These are reviewed and modeled along with the measurement instruments, cables and loads. Within this task, considerations on electrical safety are done and the impact of safety in the design of EMC filters is shown. The modeling of the conducted emissions is highly important and is achieved here, for modern three-phase PWM converters, through simplified equivalent circuits and noise source spectra based on simulation results and/or hardware measurements. The limitations of the performed EMC oriented modeling are discussed, where it is seen that the models can be successfully applied for the design of EMC filters. Detailed models of filter components have been studied and are employed in the. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Mestrado acadêmico: (3) Doutorado: (1) . , Integrantes: Marcelo Lobo Heldwein - Coordenador / Johann Walter Kolar - Integrante., Financiador(es): Swiss Federal Institute of Technology Zurich - Auxílio financeiro., Número de produções C, T & A: 23

• 2002 - 2008

  Novel Hybrid Unidirectional Three-Phase AD-DC Converter Systems, Descrição: This work aims on the development and study of new three-phase rectifier topology concepts with high Power Factor, which are based in the hybrid connections of passive and active circuits. The results are to be compared with ?state-of-the-art? purely active solutions for application in Future More Electric Aircrafts. ETH project: 18786. , Situação: Em andamento; Natureza: Pesquisa. , Alunos envolvidos: Doutorado: (3) . , Integrantes: Marcelo Lobo Heldwein - Integrante / Johann Walter Kolar - Coordenador / Guanghai Gong - Integrante / Kazuaki Mino - Integrante., Número de produções C, T & A: 3

• 2002 - 2006

  High Output Voltage Series-Parallel Resonant DC-DC Converter for Medical X-Ray Imaging Applications, Descrição: This work presents a comprehensive study on the voltage series-parallel resonant DC-DC converter. The system output voltage control is by a combination of duly-cycle and switching frequency variation, where soft-switching is preserved over the entire operating range. The basic principle of operation of the converter is described and an analytical model is established which does provide a basis for the numerical calculation of the stresses on the power components. Furthermore, a control strategy for minimizing the no-load conduction losses is proposed and the transient behavior in case of load steps including output short-circuit is discussed based on digital simulations. ETH project: 18783. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Doutorado: (3) . , Integrantes: Marcelo Lobo Heldwein - Integrante / Johann Walter Kolar - Coordenador / Jürgen Biela - Integrante / Fabiana da Silveira Cavalcante - Integrante.

• 2001 - 2004

  Voltage Range Extended 4-Switch Rectifier (VRX-4) with Sinusoidal Input Voltages and Low Effects on the Mains, Descrição: In this project the integration of a three-phase buck-type rectifier and a boost converter is analyzed. This novel topology facilitates a wide input and/or output voltage range for a minimum number of power switches and therefore enables high power density and low realization costs. In this project the key technologies for this system are developed and analyzed in detail, such as the identification of optimum modulation methods concerning switching losses and input current quality; the realization of digital control structures which enable sinusoidal input currents also for the case of phase loss/asymmetries; the design of a DM/CM input filter for compliance with EMC standards; and the performance evaluation of the whole system based on switching loss measurements. The considerations are verified on a 5kW prototype in order to establish the topology for future industry applications, e.g. for telecommunication power supply units and/or in the more electric aircraft field. ETH project: 12688. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Doutorado: (3) . , Integrantes: Marcelo Lobo Heldwein - Integrante / Johann Walter Kolar - Integrante / Guanghai Gong - Integrante / Thomas Nussbaumer - Coordenador / Simon Round - Integrante., Número de produções C, T & A: 5

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