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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: 75
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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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