Induction motor

If induction motor is also called a rotating transformer. Why is its efficiency less than the transformer?


  • VivekKVivekK Pune, IndiaForum Coordinator

    There are two reasons for this

    1. Because it is rotating - It will have friction and windage loses. Transformer has no moving parts

    2. Because there is an air gap between stator and rotor - This increases the mmf and magnetizing current to push the magnetic flux overcoming the air gap reluctance. The additional mmf needs to be supplied from the input supply

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