Synchronous Motors If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then the motor stops it continues to run at the same speed it runs at a very high speed it runs at a slower speed the motor stops it continues to run at the same speed it runs at a very high speed it runs at a slower speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the rotor copper loss are met by ______ Supply lines Armature input Dc source Motor input Supply lines Armature input Dc source Motor input ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of a synchronous motor is None of the listed here Identical to that of a dc motor Nonsalient pole type Salient pole type None of the listed here Identical to that of a dc motor Nonsalient pole type Salient pole type ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor copper losses, in a synchronous motor, are met by c. source supply lines armature input motor input c. source supply lines armature input motor input ANSWER DOWNLOAD EXAMIANS APP
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 leading power factor with over-excitation leading power factor with under-excitation no change of power factor lagging power factor with over-excitation leading power factor with over-excitation leading power factor with under-excitation no change of power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The maximum speed variation in a 3 phase synchronous motor is Zero 4 percent 10 percent 2 percent Zero 4 percent 10 percent 2 percent ANSWER DOWNLOAD EXAMIANS APP
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