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A comment on An electric motor that does not need expensive rare-earth magnets. Parent comment

Re:An electric motor that does not need expensive rare-earth... by Ygg2 on Friday November 16, 2012 @05:16AM (#4793246)
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.
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Re:An electric motor that does not need expensive rare-earth... by reportingsjr on Friday November 16, 2012 @12:05PM (#4794668)
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/...

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Re:An electric motor that does not need expensive rare-earth... by frankus on Saturday November 17, 2012 @04:36PM (#4799066)
Induction motors used in vehicles are basically always three-phase machines driven by a variable-frequency inverter.
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