EMI Suppression in Voltage Source Converters by Utilizing dc-link Decoupling Capacitors

Author

Qian Liu ; Shuo Wang ; Baisden, A.C. ; Fei Wang ; Boroyevich, D.

Author_Institution

GE Global Res. Center, Niskayuna

Volume

22

Issue

4

fYear

2007

fDate

7/1/2007 12:00:00 AM

Firstpage

1417

Lastpage

1428

Abstract

Direct current (dc)-link decoupling capacitors are normally used to control the voltage overshoot of switching devices in voltage source converters. This paper analyzes decoupling capacitors´ impacts on device electromagnetic interference (EMI) noise as well as on device voltage stress. The design and selection of decoupling capacitors considering both voltage stress and EMI suppression are presented. A new high-frequency EMI filter by utilizing the decoupling capacitors is proposed. The filter is adopted as a local EMI filter for power modules. The integratable characteristics of the proposed filter are discussed. Simulation and experimental results verify the design. This high-frequency filter shows good attenuation for high-frequency EMI noise and voltage overshoot suppression.

Keywords

capacitors; electromagnetic interference; interference suppression; power convertors; power filters; voltage control; EMI suppression; device electromagnetic interference; device voltage stress; direct current-link decoupling capacitors; high-frequency EMI filter; switching devices; voltage overshoot control; voltage source converters; Capacitors; Circuit noise; Electromagnetic interference; Inductance; Power electronics; Power harmonic filters; Semiconductor device noise; Stress; Switching converters; Voltage; $Y$ capacitor; Common mode (CM); EMI filter; conducted electromagnetic interference (EMI); decoupling capacitor; differential mode (DM); integrated power electronics module (IPEM);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2007.900593

Filename

4267765