Simple passive lossless snubber for high-power multilevel inverters

被引：37
作者：
He, Xiangning [1 ]
Chen, Alian
Wu, Hongyang
Deng, Yan
Zhao, Rongxiang
机构：
[1] Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Peoples R China
[2] Delta Power Elect Ctr, Shanghai 201209, Peoples R China
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2006年 / 53卷 / 03期
关键词：
inverters; lossless circuits; multilevel systems; snubbers;
D O I：
10.1109/TIE.2006.874422
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A passive lossless snubber circuit for multilevel inverters is proposed in this paper. The topology is simple and requires no extra control circuit. In order to reduce the high-voltage stress on power switches with this snubber circuit, an improved snubber circuit is presented by adding separate low-power direct current voltage sources into the original one. The operating principles and design considerations are described in detail in this paper. A prototype of a three-phase three-level diode-clamped inverter with the improved passive lossless snubber is built and tested. The simulation and experimental results indicate that not only can it realize the soft switching operation of the three-level inverter with low-voltage stress but also the topology and the control are simple.
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页码：727 / 735
页数：9
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