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Which component of torque equation, Te(av) = 1/8 Im^2(Ld-Lq)sin2δ+1/2 IfImMmaxsinδ represents the electromagnetic/interaction torque in single phase salient pole synchronous machine?

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Which component of torque equation, Te(av) = 1/8 Im^2(Ld-Lq)sin2δ+1/2 IfImMmaxsinδ represents the electromagnetic/interaction torque in single phase salient pole synchronous machine?

(a) 1/2 IfImMmaxsinδ

(b) 1/8 Im^2(Ld-Lq)sin2δ

(c) 1/8 Im^2(Ld-Lq)sin2δ + 1/2 IfImMmaxsinδ

(d) none of the mentioned

The question was posed to me by my school teacher while I was bunking the class.

Enquiry is from Elementary Synchronous Machines topic in division Basic Concepts in Rotating Machines of Electrical Machines

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The correct answer is (a) 1/2 IfImMmaxsinδ

Best explanation: The torque developed by the interaction of both stator and rotor magnetic fields is the electromagnetic/interaction torque.

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