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Synchronous Motors
In a synchronous motor, the magnitude of stator back emf depends on _____
Load on the motor
Both the speed and rotor flux
Dc excitation only
Speed of the rotor
Load on the motor
Both the speed and rotor flux
Dc excitation only
Speed of the rotor
Answer
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Related Question
Synchronous Motors
Leading power factor synchronous motors cost ______ the unity pf motors.
None of the listed here
About the same as
More than
Less than
None of the listed here
About the same as
More than
Less than
Answer
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Synchronous Motors
For reciprocating compressor, the synchronous motor is designed to have pull in torque of about ______ times the full load torque.
2
0.5
6
5
2
0.5
6
5
Answer
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Synchronous Motors
The capacity of a synchronous capacitor is generally in the range of
MVAR
kVAR
None of the listed here
VAR
MVAR
kVAR
None of the listed here
VAR
Answer
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Synchronous Motors
The maximum speed variation in a 3 phase synchronous motor is
4 percent
Zero
10 percent
2 percent
4 percent
Zero
10 percent
2 percent
Answer
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Synchronous Motors
An over excited synchronous motor behaves as _____
A resistor
A capacitor
An inductor
None of the listed here
A resistor
A capacitor
An inductor
None of the listed here
Answer
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