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A passive EMI filter for preventing high-frequency leakage current from flowing through the grounded inverter heat sink of an adjustable-speed motor drive system

Authors :
Akagi, Hirofumi
Doumoto, Takafumi
Source :
IEEE Transactions on Industry Applications. Sept-Oct, 2005, Vol. 41 Issue 5, p1215, 9 p.
Publication Year :
2005

Abstract

This paper focuses on the high-frequency leakage current flowing through the grounded heat sink of a voltage-source pulsewidth-modulation (PWM) inverter in an adjustable-speed motor drive system. A passive electromagnetic interference (EMI) filter is proposed, designed, and tested for a 200-V 3.7-kW drive system. This filter does require access to the ungrounded motor neutral point. An equivalent common-mode circuit for the drive system equipped with the EMI filter is derived from experimental waveforms along with theoretical discussions. Experimental results verify that the EMI filter is viable and effective in eliminating both heat-sink and motor-frame leakage currents from the drive system. Index Terms--Common-mode voltage, electromagnetic interference (EMI), inverters, leakage current, motor drives, shaft voltage.

Details

Language :
English
ISSN :
00939994
Volume :
41
Issue :
5
Database :
Gale General OneFile
Journal :
IEEE Transactions on Industry Applications
Publication Type :
Academic Journal
Accession number :
edsgcl.137161815