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Reduce motor size, power use with field-oriented control

Posted: 23 Sep 2006     Print Version  Bookmark and Share

Keywords:field oriented control  scalar control  algorithm 

Traditional scalar control techniques for variable speed operation of three-phase electric motors offer simple implementation but limit the performance that can be achieved. With a scalar drive, algorithm limitations can mean that meeting dynamic response specifications requires choosing a larger motor and a larger drive that complements the larger motor.

However, this tends to drag down the efficiency while resulting in a more expensive system. Field oriented control (FOC) overcomes this problem by squeezing out more performance out of the same motor.

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