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The electromagnetic torque in non salient pole machines depends on _________

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The electromagnetic torque in non salient pole machines depends on _________

(a) number of poles

(b) machine dimensions at the air gap

(c) peak value of stator and rotor MMF

(d) any of the mentioned

The question was asked during an online interview.

The origin of the question is Production of Torque in Non-Salient Pole Machines topic in section Synchronous Machines of Electrical Machines

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Right choice is (d) any of the mentioned

The best I can explain: Te also depends on the sine of the angle between the axis of the two fields(or MMFs) Te = -(P/2)(μoΠrl/g)(FsFr)sinλNm.

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