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SYNCHRONOUS MOTORS

Synchronous Motors
A synchronous motor will always stop when

Supply voltage frequency changes
Supply voltage fluctuates
Excitation winding gets disconnected
Load in motor varies

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Synchronous Motors
Mostly, synchronous motors are of

Induction type machines
Smooth cylindrical type machines
Salient pole type machines
Alternator type machines

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Synchronous Motors
A synchronous motor can be started by

Dc compound motor
Provinding damper winding
Pony motor
All of the listed here

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Synchronous Motors
A three phase synchronous motor will have

Two slip rings
One slip rings
No slip rings
Three slip rings

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Synchronous Motors
Synchronous motor always run at

More than synchronous speed
Less than synchronous speed
None of the listed here
The synchronous speed

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