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Synchronous Motors
Mostly, synchronous motors are of
Salient pole type machines
Alternator type machines
Induction type machines
Smooth cylindrical type machines
Salient pole type machines
Alternator type machines
Induction type machines
Smooth cylindrical type machines
Answer
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Related Question
Synchronous Motors
If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then
it runs at a slower speed
it continues to run at the same speed
the motor stops
it runs at a very high speed
it runs at a slower speed
it continues to run at the same speed
the motor stops
it runs at a very high speed
Answer
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Synchronous Motors
When a synchronous motor is pulled out of synchronism, the stator current ________
Is increased too much
Remains unchanged
Is decreased too much
Become zero
Is increased too much
Remains unchanged
Is decreased too much
Become zero
Answer
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Synchronous Motors
The rotor copper losses, in a synchronous motor, are met by
motor input
armature input
c. source
supply lines
motor input
armature input
c. source
supply lines
Answer
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Synchronous Motors
For power factor correction, synchronous motors operate at
no-load and under-excited fields
normal load with zero excitation
no-load and greatly over-excited fields
normal load with minimum excitation
no-load and under-excited fields
normal load with zero excitation
no-load and greatly over-excited fields
normal load with minimum excitation
Answer
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Synchronous Motors
A synchronous motor develops maximum power when load angle is
60°
90°
120°
45°
60°
90°
120°
45°
Answer
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