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An active circuit for cancellation of common-mode voltage generated by a PWM inverter
- Source :
- IEEE Transactions on Power Electronics. Sept, 1998, Vol. 13 Issue 5, p835, 7 p.
- Publication Year :
- 1998
-
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. Index Terms - Active common-noise canceler (ACC), bearing current, EMI/EMC, ground current, PWM inverter, shaft voltage.
Details
- ISSN :
- 08858993
- Volume :
- 13
- Issue :
- 5
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.21170053