An active circuit for cancellation of common-mode voltage generated by a PWM inverter

Author

Ogasawara, Satoshi ; Ayano, Hideki ; Akagi, Hirofumi

Author_Institution

Dept. of Electr. Eng., Okayama Univ., Japan

Volume

13

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

835

Lastpage

841

Abstract

This paper proposes an active common-noise canceler (ACC) that is capable of eliminating the common-mode voltage produced by a pulsewidth modulation (PWM) inverter. An emitter follower using complementary transistors and a common-mode transformer are incorporated into the ACC, the design method of which is also presented in detail. Experiments using a prototype ACC, whose design and construction are discussed in this paper, verify its viability and effectiveness in eliminating common-mode voltage in a 3.7 kW induction motor drive using an insulated gate bipolar transistor (IGBT) inverter. Some experimental results show that the ACC makes significant contributions to reducing a ground current and a conducted electromagnetic interference (EMI). In addition, the ACC can prevent an electric shock on a nongrounded motor frame and can suppress motor shaft voltage

Keywords

PWM invertors; active networks; amplifiers; electromagnetic compatibility; electromagnetic interference; induction motor drives; insulated gate bipolar transistors; interference suppression; 3.7 kW; EMC; IGBT; PWM inverter; active circuit; common-mode transformer; common-mode voltage cancellation; complementary transistors; conducted EMI reduction; conducted electromagnetic interference; electric shock prevention; emitter follower; ground current reduction; induction motor drive; insulated gate bipolar transistor; motor shaft voltage suppression; nongrounded motor frame; pulsewidth modulation inverter; Active circuits; Design methodology; Electromagnetic interference; Insulated gate bipolar transistors; Power transformer insulation; Prototypes; Pulse inverters; Pulse transformers; Pulse width modulation inverters; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.712285

Filename

712285