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Synchronous Motors
The power factor of a synchronous motor is better than that of induction motor because
synchronous motor runs at synchronous speed
synchronous motor has large air gap
stator supply is relieved of responsibility of producing magnetic field
mechanical load on the motor can be adjusted
synchronous motor runs at synchronous speed
synchronous motor has large air gap
stator supply is relieved of responsibility of producing magnetic field
mechanical load on the motor can be adjusted
Answer
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Related Question
Synchronous Motors
The pull out torque of a synchronous motor is generally ______ times its full-load torque.
1.25 to 3.5
6 to 9
5 to 10
0.5
1.25 to 3.5
6 to 9
5 to 10
0.5
Answer
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Synchronous Motors
The percentage slip in case of a synchronous motor is
0.005
0.01
1
zero
0.005
0.01
1
zero
Answer
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Synchronous Motors
A synchronous motor runs at only one speed because it ______
Has a damper winding
Is a doubly fed machine
Has no losses
None of the listed here
Has a damper winding
Is a doubly fed machine
Has no losses
None of the listed here
Answer
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Synchronous Motors
For the same active power consumed, the stator current of a synchronous motor is ______ that of a 3 phase induction motor.
None of the listed here
More than
Less than
The same as
None of the listed here
More than
Less than
The same as
Answer
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Synchronous Motors
If the field of a synchronous motor is underexcited, the power factor will be
zero
unity
lagging
leading
zero
unity
lagging
leading
Answer
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