Synchronous Motors A synchronous motor can develop synchronous torque only at synchronous speed while over-excited below or above synchronous speed when under loaded only at synchronous speed while over-excited below or above synchronous speed when under loaded ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When pull-out torque occurs in a synchronous motor, the poles of the rotor are _______ Mid way between N and S poles of stator 45° (electrical) behind stator poles Coincident with statorbpoles None of the listed here Mid way between N and S poles of stator 45° (electrical) behind stator poles Coincident with statorbpoles None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Become zero Remains unchanged Is increased too much Is decreased too much Become zero Remains unchanged Is increased too much Is decreased too much ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Slip rings in a synchronous motor carry Direct current No current Alternating current All of the listed here Direct current No current Alternating current All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Dust and dirt accumulation on motor winding will result in Rise in winding temperature Shorting of coils Increased core losses Eddy current flow Rise in winding temperature Shorting of coils Increased core losses Eddy current flow ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The magnitude of field flux in a 3-phase synchronous motor Varies with speed Varies with the load Varies with power factor Remains constant at all loads Varies with speed Varies with the load Varies with power factor Remains constant at all loads ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS