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In the design of electromagnetic devices, the maximum value of MMF is limited from the considerations of ____________

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In the design of electromagnetic devices, the maximum value of MMF is limited from the considerations of ____________

(a) temperature rise

(b) limitation on flux density in teeth

(c) torque production rise

(d) power rating

I have been asked this question in an interview.

I need to ask this question from Production of Torque in Non-Salient Pole Machines in section Synchronous Machines of Electrical Machines

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Right answer is (a) temperature rise

The explanation is: The maximum value of MMF is limited from a consideration of temperature rise.

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