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Synchronous Motors
The duration of sudden short circuit test on synchronous motor is usually about
One hour
None of the listed here
One second
One minute
One hour
None of the listed here
One second
One minute
Answer
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Related Question
Synchronous Motors
A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______
36
None of the listed here
30
16
36
None of the listed here
30
16
Answer
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Synchronous Motors
The duration of sudden short-circuit test on a synchronous motor is usually about
one hour
one minute
None of these
one second
one hour
one minute
None of these
one second
Answer
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Synchronous Motors
Leading power factor synchronous motors cost ______ the unity pf motors.
Less than
About the same as
None of the listed here
More than
Less than
About the same as
None of the listed here
More than
Answer
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Synchronous Motors
In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then
the motor is said to be fully loaded
the excitation is said to be hundred per cent
the excitation is said to be zero per cent
the torque generated is maximum
the motor is said to be fully loaded
the excitation is said to be hundred per cent
the excitation is said to be zero per cent
the torque generated is maximum
Answer
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Synchronous Motors
The back emf in the stator of a synchronous motor depends on
Flux density
None of the listed here
Rotor excitation
Rotor speed
Flux density
None of the listed here
Rotor excitation
Rotor speed
Answer
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