A novel passive lossless snubber for high power multilevel inverters

Author

Wu, Hongyang ; Deng, Yan ; Zhao, Rongxiang ; He, Xiangning

Author_Institution

Power Electron. Inst., Zhejiang Univ., Hangzhou, China

Volume

2

fYear

2002

fDate

2002

Firstpage

1011

Abstract

A novel passive lossless snubber circuit for multilevel inverters is proposed in the paper. The topology of it is simple and requires no extra control. In order to reduce the high voltage stress on power switches of multilevel inverters with the proposed snubber circuit, an improved snubber circuit is presented by adding separate low-power DC sources into the original snubber. The operation principles and design considerations are described in detail in the paper. A prototype of three-phase three-level diode clamp inverter with the improved passive lossless snubber is built and tested. The simulation and experimentation indicate that not only can it realize soft switching operation of the three-level inverter with low voltage stress but also the topology is simple

Keywords

invertors; power semiconductor diodes; snubbers; switching circuits; high voltage stress reduction; low-power DC sources; multilevel inverters; operation principles; passive lossless snubber circuit; power switches; three-phase three-level diode clamp inverter; topology; Circuit simulation; Circuit testing; Circuit topology; Clamps; Diodes; Inverters; Prototypes; Snubbers; Stress; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE

Conference_Location

Dallas, TX

Print_ISBN

0-7803-7404-5

Type

conf

DOI

10.1109/APEC.2002.989368

Filename

989368