A reluctance motor has direct-axis reluctance of 3 and quadrature-axis reluctance of 5. The motor torque depends on:

Option 1: Sum of reluctances

Option 2: Difference of reluctances

Option 3: Product of reluctances

Option 4: Ratio of reluctances

Correct Option: 2

Reluctance motor torque depends on the difference between direct-axis and quadrature-axis reluctances. Greater the difference, higher the torque.

Flux control method of shunt motor gives