EMC performance improvement of auxiliary power supplies in three-phase PWM converters

被引：0
|
作者：
Wang M. [1 ]
Qu D.-C. [1 ]
Chen G.-Z. [1 ]
机构：
[1] College of Electrical Engineering, Zhejiang University, Hangzhou
来源：
Chen, Guo-Zhu (gzchen@zju.edu.cn) | 1600年 / Zhejiang University卷 / 50期
关键词：
Common mode voltage; Electro-magnetic compatibility (EMC); High-frequency conduction model; Stability of auxiliary power supply; Three-phase PWM converter;
D O I：
10.3785/j.issn.1008-973X.2016.04.009
中图分类号：
学科分类号：
摘要：
Auxiliary power supplies of the power electronic devices in three-phase pulse width modulation (PWM) converters were interfered by electro-magnetic interfere (EMI) noises. Electro-magnetic compatibility (EMC) performance improvement of the power supplies was analyzed. The high-frequency EMI source caused by high-frequency switching devices of the three phase converter was quantitatively analyzed and calculated. The high-frequency models of the converter and its auxiliary power supplies were given in detail. Three EMI conduction routes were illustrated based on the high-frequency modeling. Route I and II are between main circuit and the supplies. Route III is between different supplies. The equivalent circuits and the corresponding transfer functions of the three conduction routes were obtained through the high-frequency model. Methods to suppress the interferences and improve the EMC performance of the auxiliary power supplies were proposed. The simulation and experimental results validate that interference between different supplies is the main EMI noise and can be greatly reduced through paralleled capacitors on the output of the power supplies. © 2016, Zhejiang University Press. All right reserved.
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页码：657 / 662and758
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