Considerations for using VFDs with standard motors - Webinar Recordings - EASA | The Electro•Mechanical Authority
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Trade press article — Plant Engineering

Considerations for using VFDs with standard motors

There are areas of concern when trying to control both speed and cost

  • June 2019
  • Number of views: 11140
  • Article rating:

Mike Howell
EASA Technical Support Specialist

End users desiring speed and/or torque control often buy variable-frequency drives (VFDs) to modify existing applications where a standard induction motor is in place. Frequently, they try to control costs by using that existing standard induction motor. Before taking that path, however, it is best to consider a few areas of concern with the approach.

Topics covered in this article include:

  • Speed-torque characteristics
  • Shaft currents
  • Installation

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ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100
  • Section 4: Testing

EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 2: AC Machines
  • Section 5: Electronics
  • Section 8: Bearings

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)
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Principles of Medium & Large AC Motors (IEC Standards)
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Root Cause Failure Analysis
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Mechanical Repair Fundamentals of Electric Motors
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Fundamentals of Pump Repair
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Tags: Variable frequency drives
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