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Synchronous Motors
When the synchronous motor is pulled out of synchronism, the stator current _______
Is increased too much
Remains unchanged
Becomes zero
Is decreased too much
Is increased too much
Remains unchanged
Becomes zero
Is decreased too much
Answer
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Related Question
Synchronous Motors
The pull out torque of a synchronous motor will ______ as the field excitation is increased.
None of the listed here
Decrease
Remain unchanged
Increase
None of the listed here
Decrease
Remain unchanged
Increase
Answer
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Synchronous Motors
Change of D.C. excitation of a synchronous motor changes
Applied voltage of the motor
Motor speed
Any of the above
Power factor of power drawn by the motor
Applied voltage of the motor
Motor speed
Any of the above
Power factor of power drawn by the motor
Answer
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Synchronous Motors
The power factor of a synchronous motor is better than that of induction motor because
synchronous motor has large air gap
stator supply is relieved of responsibility of producing magnetic field
synchronous motor runs at synchronous speed
mechanical load on the motor can be adjusted
synchronous motor has large air gap
stator supply is relieved of responsibility of producing magnetic field
synchronous motor runs at synchronous speed
mechanical load on the motor can be adjusted
Answer
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Synchronous Motors
An over excited synchronous motor behaves as _____
A resistor
None of the listed here
A capacitor
An inductor
A resistor
None of the listed here
A capacitor
An inductor
Answer
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Synchronous Motors
A synchronous motor can develop synchronous torque
below or above synchronous speed
when under loaded
only at synchronous speed
while over-excited
below or above synchronous speed
when under loaded
only at synchronous speed
while over-excited
Answer
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