Discussion
True or false: a switched reluctance machine needs no permanent magnet or rotor winding.
Answer: C
Correct answer: True, its rotor being plain shaped steel
The rotor is a stack of laminations shaped into salient poles - no winding, no magnet, no cage, no brushes. That is the machine’s principal attraction: cheap to make, mechanically robust, able to run at high speed and high temperature, and with nothing on the rotor to fail.
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