Synchronous Motors An over excited synchronous motor is used for Power factor corrections Fluctuating loads Low torque loads Variable speed loads Power factor corrections Fluctuating loads Low torque loads Variable speed loads 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 less twice more equal less twice more equal ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95% 75 to 80% 99 to 99.5% 60 to 70% 85 to 95% 75 to 80% 99 to 99.5% 60 to 70% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor copper losses, in a synchronous motor, are met by armature input motor input c. source supply lines armature input motor input c. source supply lines ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For reciprocating compressor, the synchronous motor is designed to have pull in torque of about ______ times the full load torque. 2 0.5 5 6 2 0.5 5 6 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-out torque None of these pull-in torque pull-up torque pull-out torque None of these pull-in torque pull-up torque ANSWER DOWNLOAD EXAMIANS APP
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