A power electronic transformer for PWM AC drive with lossless commutation and common-mode voltage suppression

Kaushik Basu, Ned Mohan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

This paper presents a novel dc/ac converter topology with a high frequency transformer-link for three-phase adjustable magnitude and frequency PWM ac drives. Such drives find wide range of applications including UPS systems and drives involving renewable energy sources like solar and fuel cells. One recent potential area of application is renewable energy sources like wind or wave connected with HVDC grid. Here power conversion is single stage and bidirectional. Use of high frequency transformer results in high power density. The proposed topology minimizes the number of switching transitions between the transformer winding and the load and hence reduces common-mode voltage switching and improves the quality of the output voltage waveform. A novel modulation technique presented in this paper results in minimum common-mode voltage switching. A lossless source based commutation method has been developed to commute the energy stored in the leakage inductances of the high frequency transformer. This method also results in soft switching (ZCS) of all four-quadrant switches in the load side converter. The proposed converter has been analyzed and simulated. The presented simulation results verify the operation of the proposed topology.

Original languageEnglish (US)
Title of host publication2010 Joint International Conference on Power Electronics, Drives and Energy Systems, PEDES 2010 and 2010 Power India
DOIs
StatePublished - 2010
Event2010 Joint International Conference on Power Electronics, Drives and Energy Systems, PEDES 2010 and 2010 Power India - New Delhi, India
Duration: Dec 20 2010Dec 23 2010

Publication series

Name2010 Joint International Conference on Power Electronics, Drives and Energy Systems, PEDES 2010 and 2010 Power India

Other

Other2010 Joint International Conference on Power Electronics, Drives and Energy Systems, PEDES 2010 and 2010 Power India
CountryIndia
CityNew Delhi
Period12/20/1012/23/10

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