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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 excitation is said to be hundred per cent
the torque generated is maximum
the motor is said to be fully loaded
the excitation is said to be zero per cent
the excitation is said to be hundred per cent
the torque generated is maximum
the motor is said to be fully loaded
the excitation is said to be zero per cent
Answer
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Related Question
Synchronous Motors
The capacity of a synchronous capacitor is generally in the range of
VAR
None of the listed here
MVAR
kVAR
VAR
None of the listed here
MVAR
kVAR
Answer
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Synchronous Motors
A synchronous machine with large air gap has
all of the listed here
a small value of inherent regulation
a higher synchronizing power which makes the machine less sensitive to load variations
a higher value of stability limit
all of the listed here
a small value of inherent regulation
a higher synchronizing power which makes the machine less sensitive to load variations
a higher value of stability limit
Answer
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Synchronous Motors
In order to to reverse the direction of a synchronous motor, _______
None of the listed here
Interchange any two stator lines
Change supply frequency
Reduce dc field excitation to zero
None of the listed here
Interchange any two stator lines
Change supply frequency
Reduce dc field excitation to zero
Answer
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Synchronous Motors
The construction of a synchronous motor ressembles
A series motor
A rotary converter
An induction motor
An alternator
A series motor
A rotary converter
An induction motor
An alternator
Answer
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Synchronous Motors
The armature current of the synchronous motor has higher values for
Both higher and low excitation
None of the listed here
Low excitation only
Higher excitation only
Both higher and low excitation
None of the listed here
Low excitation only
Higher excitation only
Answer
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