Analysis and design of snubber circuit for Z-source inverter applications

被引：11
作者：
Dong, Shuai [1 ]
Zhang, Qianfan [1 ]
Cheng, Shukang [1 ]
机构：
[1] Harbin Inst Technol, Sch Elect Engn & Automat, Harbin 150001, Peoples R China
来源：
IET POWER ELECTRONICS | 2016年 / 9卷 / 05期
基金：
中国国家自然科学基金;
关键词：
snubbers; invertors; voltage distortion; energy loss; shoot-through state; DC link voltage; RCD clamp snubber circuits; Z-source inverter; MODULATION;
D O I：
10.1049/iet-pel.2015.0168
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The Z-source inverter (ZSI) is a topology with many advantages for power electronics interfaces. Shoot-through states are utilised to boost the DC-link voltage. This study shows that traditional C, RC, RCD, and RCD clamp snubber circuits are not suitable for ZSI. When these snubber circuits are used for ZSI, there will be a distortion in the DC-link voltage, and this voltage will be higher than that without the snubber circuits. The shoot-through state causes larger energy losses, which greatly lowers the efficiency of ZSI. This study presents an improved RCD snubber circuit for ZSI applications. This design reduces the voltage distortion and energy losses. In addition, the theoretical analysis and design guidelines for snubber circuits of ZSI are confirmed by computer simulation and experimental verification.
引用
收藏
页码：1083 / 1091
页数：9
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