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SYNCHRONOUS MOTORS

Synchronous Motors
A synchronous motor will always stop when

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

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Synchronous Motors
Mostly, synchronous motors are of

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

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Synchronous Motors
A synchronous motor can be started by

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

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Synchronous Motors
A three phase synchronous motor will have

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

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Synchronous Motors
Synchronous motor always run at

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

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