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Why Is The Efficiency Of A Three-phase Induction Motor Is Less Than That Of A Three-phase Transformer?

Answer»

Three PHASE Induction motor is nothing but a rotating transformer.

  1. Due to rotating nature, there are friction and windage losses ASSOCIATED with it.
  2. On the other hand, the three-phase transformer is a STATIC device, thus there are no ROTATIONAL losses.
  3. Thus the efficiency of three-phase induction motor is less than that of a three-phase transformer.

Three phase Induction motor is nothing but a rotating transformer.


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