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 30 16 None of the listed here 36 30 16 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 99 to 99.5% 75 to 80% 85 to 95% 60 to 70% 99 to 99.5% 75 to 80% 85 to 95% 60 to 70% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the magnitude of stator back emf depends on _____ Load on the motor Dc excitation only Both the speed and rotor flux Speed of the rotor Load on the motor Dc excitation only Both the speed and rotor flux Speed of the rotor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Hunting in a synchronous motor cannot be due to variable frequency windage friction variable supply voltage variable load variable frequency windage friction variable supply voltage variable load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The magnitude of field flux in a 3-phase synchronous motor Remains constant at all loads Varies with the load Varies with speed Varies with power factor Remains constant at all loads Varies with the load Varies with speed Varies with power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of the synchronous motor has higher values for None of the listed here Higher excitation only Both higher and low excitation Low excitation only None of the listed here Higher excitation only Both higher and low excitation Low excitation only ANSWER DOWNLOAD EXAMIANS APP
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