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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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Related Question
Synchronous Motors
The armature current of the synchronous motor has higher values for
Higher excitation only
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
Answer
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Synchronous Motors
Leading power factor synchronous motors cost ______ the unity pf motors.
Less than
More than
None of the listed here
About the same as
Less than
More than
None of the listed here
About the same as
Answer
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Synchronous Motors
A synchronous machine with large air gap has
a small value of inherent regulation
a higher value of stability limit
a higher synchronizing power which makes the machine less sensitive to load variations
all of the listed here
a small value of inherent regulation
a higher value of stability limit
a higher synchronizing power which makes the machine less sensitive to load variations
all of the listed here
Answer
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Synchronous Motors
The efficiency of a properly designed synchronous motor will usually fall in range
85 to 95%
60 to 70%
75 to 80%
99 to 99.5%
85 to 95%
60 to 70%
75 to 80%
99 to 99.5%
Answer
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Synchronous Motors
The construction of a synchronous motor ressembles
A series motor
An alternator
A rotary converter
An induction motor
A series motor
An alternator
A rotary converter
An induction motor
Answer
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