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Synchronous Motors
While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerting torque is produced by
eddy current and hysteresis torque in pole faces
induction motor torque in field winding
All of the listed here
induction motor torque in damper winding
eddy current and hysteresis torque in pole faces
induction motor torque in field winding
All of the listed here
induction motor torque in damper winding
Answer
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Related Question
Synchronous Motors
The size of a synchronous motor decreases with the increase in
Horse power rating
All of the listed here
Flux density
Speed
Horse power rating
All of the listed here
Flux density
Speed
Answer
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Synchronous Motors
The net armature voltage of a synchronous motor is equal to the
arithmetic difference of Eb and V
arithmetic sum of Eb and V
vector difference of Eh and V
vector sum of Eb and V
arithmetic difference of Eb and V
arithmetic sum of Eb and V
vector difference of Eh and V
vector sum of Eb and V
Answer
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Synchronous Motors
A synchronous motor delivers reactive power when ______
Under excited
Over excited
None of the listed here
Normally excited
Under excited
Over excited
None of the listed here
Normally excited
Answer
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Synchronous Motors
Which of the following motors is non self starting?
Dc series motor
Synchronous motor
Squirrel cage induction motor
Wound rotor induction motor
Dc series motor
Synchronous motor
Squirrel cage induction motor
Wound rotor induction motor
Answer
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Synchronous Motors
When the field of a synchronous motor is under-excited, the power factor will be
zero
leading
lagging
unity
zero
leading
lagging
unity
Answer
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