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Synchronous Motors
Hunting in a synchronous motor cannot be due to
variable supply voltage
variable load
variable frequency
windage friction
variable supply voltage
variable load
variable frequency
windage friction
Answer
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Related Question
Synchronous Motors
The magnitude of field flux in a 3-phase synchronous motor
Remains constant at all loads
Varies with speed
Varies with the load
Varies with power factor
Remains constant at all loads
Varies with speed
Varies with the load
Varies with power factor
Answer
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Synchronous Motors
In case one phase of a three-phase synchronous motor is short-circuited the motor will
take less than the rated load
run at 2/3 of synchronous speed
not start
run with excessive vibrations
take less than the rated load
run at 2/3 of synchronous speed
not start
run with excessive vibrations
Answer
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Synchronous Motors
The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as
pull-in torque
pull-up torque
pull-out torque
None of these
pull-in torque
pull-up torque
pull-out torque
None of these
Answer
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Synchronous Motors
When the synchronous motor is pulled out of synchronism, the stator current _______
Is decreased too much
Remains unchanged
Is increased too much
Becomes zero
Is decreased too much
Remains unchanged
Is increased too much
Becomes zero
Answer
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Synchronous Motors
A rotary converter can also be run as a
Dc compound generator
Synchronous motor
Dc series generator
Dc shunt generator
Dc compound generator
Synchronous motor
Dc series generator
Dc shunt generator
Answer
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