Synchronous Motors The back emf in the stator of a synchronous motor depends on Rotor excitation None of the listed here Flux density Rotor speed Rotor excitation None of the listed here Flux density Rotor speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value short circuit ratio has Lower stability limit High stability limit Good voltage regulation Good speed regulation Lower stability limit High stability limit Good voltage regulation Good speed regulation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is equal twice more less equal twice more less ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor copper losses, in a synchronous motor, are met by supply lines armature input c. source motor input supply lines armature input c. source motor input ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at no-load and under-excited fields normal load with minimum excitation normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation normal load with zero excitation no-load and greatly over-excited fields ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In case one phase of a three-phase synchronous motor is short-circuited the motor will take less than the rated load not start run with excessive vibrations run at 2/3 of synchronous speed take less than the rated load not start run with excessive vibrations run at 2/3 of synchronous speed ANSWER DOWNLOAD EXAMIANS APP
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