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Synchronous Motors

Synchronous Motors
A synchronous motor can be started by

Pony motor
All of the listed here
Dc compound motor
Provinding damper winding

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Synchronous Motors
The rotor of a synchronous motor is

Identical to that of a dc motor
Nonsalient pole type
Salient pole type
None of the listed here

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Synchronous Motors
Small synchronous motors are started by _______

None of the listed here
Damper winding
Pony motor
Variable frequency source

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Synchronous Motors
The duration of sudden short-circuit test on a synchronous motor is usually about

None of these
one hour
one second
one minute

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Synchronous Motors
When the synchronous motor runs at synchronous speed, the voltage induced in the damper winding is _____

Zero
Maximum
minimum
None of the listed here

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Synchronous Motors
The mechanical power developed by a synchronous motor is independent of _________.

Field excitation
Applied stator voltage
Speed
Torque angle

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