Spindle motor == servo motor???

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powersys

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Spindle motor is used in harddisk drive. Can I say it's a servo motor?

Thanks.
 

Servo is used for position control. For servo motors theirs always a feedback element for position information. Spindle motor normally does not require position(angle) info and just need fixed RPM so it is not a servo motor.
 

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    powersys

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saim2k said:
Servo is used for position control. For servo motors theirs always a feedback element for position information. Spindle motor normally does not require position(angle) info and just need fixed RPM so it is not a servo motor.
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Would pls provide some examples where PM brushless motor operates as servo drive?
 

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