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Induction motor application guidelines for AC variable frequency drives

  • April 2015
  • Number of views: 976
  • Article rating: No rating

Art Godfrey (retired)
Birclar Electric & Electronics
Romulus, Michigan

Introduction
Modern variable frequency drives (VFDs) offer an almost dizzying range of capabilities that include output fre­quencies into the hundreds of hertz. It can be tempting to use a standard AC induction motor with one of these VFDs. But doing so requires a thorough understanding of the intended applica­tion and how the VFD will affect the motor. Since the most popular VFDs sold today are pulse-width modulated (PWM) type, the comments and recom­mendations in this article will assume that is the type used.  Also, motor volt­age will be 600 volts or less.

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