Synchronous Motors Small synchronous motors are started by _______ Pony motor Variable frequency source Damper winding None of the listed here Pony motor Variable frequency source Damper winding None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then the torque generated is maximum the motor is said to be fully loaded the excitation is said to be zero per cent the excitation is said to be hundred per cent the torque generated is maximum the motor is said to be fully loaded the excitation is said to be zero per cent the excitation is said to be hundred per cent ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can develop synchronous torque only at synchronous speed below or above synchronous speed while over-excited when under loaded only at synchronous speed below or above synchronous speed while over-excited when under loaded ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor which loss varies with load ? Windage loss Core loss Copper loss Bearing friction loss Windage loss Core loss Copper loss Bearing friction loss ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 75 to 80% 60 to 70% 85 to 95% 99 to 99.5% 75 to 80% 60 to 70% 85 to 95% 99 to 99.5% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The minimum armature current of the synchronous motor corresponds to operation at 0.707 power factor lagging unity power factor zero power factor leading 0.707 power factor leading 0.707 power factor lagging unity power factor zero power factor leading 0.707 power factor leading ANSWER DOWNLOAD EXAMIANS APP
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