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Synchronous Motors
By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ?
By changing the supply frequency
By changing the load
By interchanging any two phases
By changing the applied voltage
By changing the supply frequency
By changing the load
By interchanging any two phases
By changing the applied voltage
Answer
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Related Question
Synchronous Motors
Dust and dirt accumulation on motor winding will result in
Eddy current flow
Rise in winding temperature
Shorting of coils
Increased core losses
Eddy current flow
Rise in winding temperature
Shorting of coils
Increased core losses
Answer
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Synchronous Motors
A synchronous motor will always stop when
Supply voltage frequency changes
Load in motor varies
Supply voltage fluctuates
Excitation winding gets disconnected
Supply voltage frequency changes
Load in motor varies
Supply voltage fluctuates
Excitation winding gets disconnected
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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Synchronous Motors
When the synchronous motor runs at synchronous speed, the voltage induced in the damper winding is _____
Maximum
Zero
minimum
None of the listed here
Maximum
Zero
minimum
None of the listed here
Answer
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Synchronous Motors
A synchronous motor develop maximum power when load angle is
45°
120°
60°
90°
45°
120°
60°
90°
Answer
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