Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be unity leading zero lagging unity leading zero lagging ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95% 99 to 99.5% 60 to 70% 75 to 80% 85 to 95% 99 to 99.5% 60 to 70% 75 to 80% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the maximum power developed depends on all of the following except rotor excitation supply voltage direction of rotation maximum value of coupling angle rotor excitation supply voltage direction of rotation maximum value of coupling angle ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The net armature voltage of a synchronous motor is equal to the vector difference of Eh and V vector sum of Eb and V arithmetic sum of Eb and V arithmetic difference of Eb and V vector difference of Eh and V vector sum of Eb and V arithmetic sum of Eb and V arithmetic difference of Eb and V ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at normal load with minimum excitation no-load and greatly over-excited fields normal load with zero excitation no-load and under-excited fields normal load with minimum excitation no-load and greatly over-excited fields normal load with zero excitation no-load and under-excited fields ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the synchronous motor is pulled out of synchronism, the stator current _______ Remains unchanged Is increased too much Becomes zero Is decreased too much Remains unchanged Is increased too much Becomes zero Is decreased too much ANSWER DOWNLOAD EXAMIANS APP
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