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what is a brushless motor? Answered

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Effectively a powerful stepper motor - or more correctly a 3 or more phase motor.

Requires to be driven by an electronic circuit which provides the moving field required to make it rotate. Generally stationary coils and moving magnets.

DVD / CD drive motors are often brushless.

yes,Wikipedia is your best bet,as the answers you seek can go on forever.
as for kelseymh,he has wasted his time by posting. you can't waste members time if we choose not to answer.so don't stop asking questions !

Wikipedia! The one and only!

http://en.wikipedia.org/wiki/Brushless_DC_electric_motor

Google is your friend. People whose time you waste are not.