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The reluctance offered to the stator flux by two small air gaps in series with high permeability iron, in reluctance machine is minimum, when the space angle θr = ___________

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The reluctance offered to the stator flux by two small air gaps in series with high permeability iron, in reluctance machine is minimum, when the space angle θr = ___________

(a) 0°

(b) 45°

(c) 90°

(d) 270°

This question was posed to me during an interview for a job.

The doubt is from Reluctance Motor in division Basic Concepts in Rotating Machines of Electrical Machines

1 Answer

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Best answer
Right option is (a) 0°

Best explanation: Only when θr = 0°, the long rotor axis is coincident with the stator d-axis, and thus reluctance is minimum.

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