Approaches to Suppressing Shaft Voltage in Brushless DC Motor Driven by PWM Inverter Based on Ungrounded Common-Mode Equivalent Circuit

• Maetani Tatsuo

  Panasonic Corporation

• Isomura Yoshinori

  Panasonic Corporation

• Watanabe Akihiko

  Panasonic Corporation

• Iimori Kenichi

  Kagoshima University

• Morimoto Shigeo

  Osaka Prefecture University

Bibliographic Information

Other Title

• インバータ駆動ブラシレスDCモータの非接地コモンモード等価回路に基づく軸電圧抑制
• インバータ クドウ ブラシレス DC モータ ノ ヒセッチ コモンモード トウカ カイロ ニ モトズク ジク デンアツ ヨクセイ

Abstract

This paper describes an ungrounded common-mode equivalent circuit for a motor driven by a voltage-source PWM inverter. When the capacitance of the rotor was is small, the reversal of the polarities of the common-mode voltage and shaft voltage is observed. In order to model this reversal, a bridge-type equivalent circuit is proposed. On the basis of calculations and experiment, it is found the values and polarity of the shaft voltage can be are accurately determined with the proposed equivalent circuit. Furthermore, the capacitance value of the insulated rotor required to make the shaft voltage equal to or less than the dielectric breakdown voltage of the bearing grease is obtained.

Journal

• IEEJ Transactions on Industry Applications

  IEEJ Transactions on Industry Applications 132 (6), 666-672, 2012

  The Institute of Electrical Engineers of Japan

Keywords

• shaft voltage
• bearing current
• common-mode voltage
• stray capacitance

Details

• CRID: 1390282679636132736
• NII Article ID: 10030607032
• NII Book ID: AN10012320
• DOI: 10.1541/ieejias.132.666
• BIBCODE: 2012IJTIA.132..666M
• ISSN: 13488163
• ISSN: 09136339
• NDL BIB ID: 023828665
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023828665
• Web Site: https://www.jstage.jst.go.jp/article/ieejias/132/6/132_666/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed