Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Under-excited Over-excited Normally excited All of these Under-excited Over-excited Normally excited All of these ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The minimum armature current of the synchronous motor corresponds to operation at 0.707 power factor leading zero power factor leading unity power factor 0.707 power factor lagging 0.707 power factor leading zero power factor leading unity power factor 0.707 power factor lagging 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 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 lagging power factor with over-excitation leading power factor with over-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The armature current of the synchronous motor has higher values for Low excitation only Higher excitation only Both higher and low excitation None of the listed here Low excitation only Higher excitation only Both higher and low excitation None of the listed here 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 5 6 0.5 2 5 6 0.5 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The mechanical power developed by a synchronous motor is ______ stator voltage. Invesely proportional to Directly proportional to square of Independent of Directly proportional to Invesely proportional to Directly proportional to square of Independent of Directly proportional to ANSWER DOWNLOAD EXAMIANS APP
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