A three-phase - salientpole synchronous motor isconnected to an infinite bus.It is operated at no load atnormal excitation. The fieldexcitation of the motor is firstreduced to zero and thenincreased in the reversedirection gradually. Then thearmature current

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A three-phase - salientpole synchronous motor isconnected to an infinite bus.It is operated at no load atnormal excitation. The fieldexcitation of the motor is firstreduced to zero and thenincreased in the reversedirection gradually. Then thearmature current