In an SR motor, torque is produced when:

Option 1: Rotor flux is maximum

Option 2: Rotor moves from aligned to unaligned position

Option 3: Rotor moves from unaligned to aligned position

Option 4: Current is zero

Correct Option: 3

Explanation

Torque is produced only when phase inductance increases. This occurs when the rotor moves from unaligned to aligned position with the energized stator pole, producing positive reluctance torque.

In an SR motor, torque is produced when:

Explanation

In 1-ϕ IM if the slip of motor is S with regard to the forward rotating flux, then its slip with regard to the backward rotating flux will be:

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