A Modified Modulation Strategy for Optimizing the Transmission Loss of Reactive Energy in the Snubber Circuit of Resonant DC Link Inverter

被引：0
|
作者：
Chu E. [1 ]
Zhou Y. [1 ]
Chen Z. [1 ]
Song Q. [1 ]
Zhang Y. [1 ]
机构：
[1] School of Information Science & Engineering, Northeastern University, Shenyang
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 22期
关键词：
Parallel resonant DC link inverter; Snubber circuit; The transmission loss of reactive energy; Zero-current switching (ZCS); Zero-voltage switching (ZVS);
D O I：
10.13334/j.0258-8013.pcsee.200079
中图分类号：
学科分类号：
摘要：
In order to solve the problem that the transmission loss of reactive energy in the snubber circuit of resonant DC link inverter is large, this paper proposed a modified modulation strategy based on a parallel resonant DC link inverter. Compared with the original modulation strategy, this modulation strategy can not only realize the soft switching of inverter bridge and resonant unit switches, but also reduce the operating frequency of snubber circuit by 1/3, reducing the conduction loss of snubber circuit and switching loss of auxiliary switches. At the same time, it can avoid the superposition of resonance current and load current at the commutation moment in the snubber circuit, so as to effectively reduce the transmission loss of reactive energy and the current stress of auxiliary switches. According to the equivalent circuits of different operating modes under the modulation strategy, the paper analyzed the operating principle, soft-switching conditions, and optimal parameter design methods of the inverter. Finally, a 10kW-10kHz prototype with insulated gate bipolar transistor (IGBT)-based switches was built. The effectiveness of the modulation strategy was verified by experiment. Experimental results were given to demonstrate the validity and features of the inverter under this modulation strategy. © 2020 Chin. Soc. for Elec. Eng.
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页码：7420 / 7430
页数：10
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