While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerting torque is produced by
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Electrical Engineering · all questionsSynchronous Motors
Synchronous Motors
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If one-phase of a 3-phase synchronous motor is short-circuited, motor
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The net armature voltage of a synchronous motor is equal to the
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The back e.m.f. of a synchronous motor depends on
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The back e.m.f. in the stator of a synchronous motor depends on
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The shaft of synchronous motor is made of
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A synchronous motor can develop synchronous torque
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When the field of a synchronous motor is under-excited, the power factor will be
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The induced e.m.f. in a synchronous motor working on leading power factor will be
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If the field of a synchronous motor is underexcited, the power factor will be
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In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then
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A synchronous motor develops maximum power when load angle is
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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
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The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as
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Change of D.C. excitation of a synchronous motor changes
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Mostly, synchronous motors are of
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A synchronous machine with low value of short-circuit ratio has
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In a synchronous motor which loss varies with load ?
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The magnitude of field flux in a 3-phase synchronous motor
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Q100
Open questionThe efficiency of a properly designed synchronous motor will usually fall in range
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