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Electrical machines miscellaneous

Electrical Machines

  1. The flux per pole in a synchronous motor with the field circuit ON and the startor disconnected from the supply is found to be 25 mWb. When startor is connected to the rated supply with the field excitation unchanged, the flux per pole in the machine is found to be 20 mWb while motor is running on no load. Assuming no load losses to be zero, the no load current drawn by the motor from the supply
    1. lags the supply voltage
    2. leads the supply voltage
    3. is in phase with the supply voltage
    4. is zero
Correct Option: B

NA



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