Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have lagging power factor with over-excitation no change of power factor leading power factor with under-excitation leading power factor with over-excitation lagging power factor with over-excitation no change of power factor leading power factor with under-excitation leading power factor with over-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Mostly, synchronous motors are of Salient pole type machines Smooth cylindrical type machines Alternator type machines Induction type machines Salient pole type machines Smooth cylindrical type machines Alternator type machines Induction type machines ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______ None of the listed here 36 16 30 None of the listed here 36 16 30 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A three phase synchronous motor will have One slip rings No slip rings Two slip rings Three slip rings One slip rings No slip rings Two slip rings Three slip rings ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed regulation of a synchronous motor is always Zero 0.5% Positive 1% Zero 0.5% Positive 1% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The back emf in the stator of a synchronous motor depends on Rotor excitation Rotor speed None of the listed here Flux density Rotor excitation Rotor speed None of the listed here Flux density ANSWER DOWNLOAD EXAMIANS APP
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