Synchronous Motors
Synchronous motors are generally used in application requiring _______

Frequent stopping
Variable speed
Infrequent starting
Sudden application of heavy loads

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Synchronous Motors
The power factor of a synchronous motor is better than that of induction motor because

mechanical load on the motor can be adjusted
synchronous motor runs at synchronous speed
stator supply is relieved of responsibility of producing magnetic field
synchronous motor has large air gap

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