Synchronous Motors The maximum speed variation in a 3 phase synchronous motor is Zero 2 percent 10 percent 4 percent Zero 2 percent 10 percent 4 percent ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the magnitude of stator back emf depends on _____ Both the speed and rotor flux Dc excitation only Speed of the rotor Load on the motor Both the speed and rotor flux Dc excitation only Speed of the rotor Load on the motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the forced vibrations will be maximum when driving A centrifugal pump Any of the listed here A centrifugal blower A reciprocating air compressor A centrifugal pump Any of the listed here A centrifugal blower A reciprocating air compressor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with low value short circuit ratio has Lower stability limit Good speed regulation High stability limit Good voltage regulation Lower stability limit Good speed regulation High stability limit Good voltage regulation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ Interchange any two stator lines None of the listed here Change supply frequency Reduce dc field excitation to zero Interchange any two stator lines None of the listed here Change supply frequency Reduce dc field excitation to zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 60 to 70% 85 to 95% 99 to 99.5% 75 to 80% 60 to 70% 85 to 95% 99 to 99.5% 75 to 80% ANSWER DOWNLOAD EXAMIANS APP
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