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IIRC, Induction motors are great, but they have one major fault, without some complex circuitry, they can't be instantly switched on/off. Although a polyphase induction motor should not have that problem.

They are not as good as permanent magnet motors except on price/material availability.

See this article: http://electronicdesign.com/article/analog-and-mixed-signal/...

Induction motors used in vehicles are basically always three-phase machines driven by a variable-frequency inverter.

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