Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989368
