A passive EMI filter for an adjustable-speed motor driven by a 400-V three-level diode-clamped inverter

Author

Akagi, Hirofumi ; Tamura, Shunsuke

Author_Institution

Tokyo Inst. of Technol., Japan

Volume

1

fYear

2004

fDate

20-25 June 2004

Firstpage

86

Abstract

This paper deals with a passive EMI filter designed for a 400-V, 15-kW induction motor driven by a three-level diode-clamped PWM inverter with a carrier frequency of 8 kHz. The EMI filter consists of a common-mode filter and a small-sized dv/dt reduction circuit. The common-mode filter is unique in terms of access to the motor neutral point. It can remove the common-mode voltage produced by the inverter from the motor terminals. This succeeds in eliminating both high-frequency motor shaft voltage and ground leakage current from the inverter-driven motor. The viability and effectiveness of the EMI filter is verified by experimental results even in the case that the motor is 100 m away from the inverter.

Keywords

PWM invertors; electromagnetic interference; induction motor drives; passive filters; variable speed drives; 15 kW; 400 V; 8 kHz; adjustable-speed motor; common-mode filter; common-mode voltage; diode-clamped PWM inverter; dv/dt reduction circuit; induction motor drive; inverter-driven motor; motor neutral point; passive EMI filter; Circuits; Diodes; Electromagnetic interference; Frequency; Induction motors; Leakage current; Passive filters; Pulse width modulation inverters; Shafts; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual

ISSN

0275-9306

Print_ISBN

0-7803-8399-0

Type

conf

DOI

10.1109/PESC.2004.1355719

Filename

1355719