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Considerations for selecting an adjustable speed drive in a constant torque application

  • February 2013
  • Number of views: 371
  • Article rating: No rating

Bill Colton
Baldor Electric Co.
Commerce, California
Technical Services Committee Member

When selecting a drive for an ap­plication, there are many technical and commercial issues to explore in arriving at a choice. The scope of this article is to consider some of the techni­cal issues involved.

Let us assume that the motor is already in place and the customer has asked you to help select an adjustable speed drive. You have determined that the application is “constant torque.” (Constant torque is the same amount of full load RMS [root mean square] torque over the entire speed range required by the application.) 

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