# A rotating electrical machine having its self-inductance of both stator and rotor winding independent of its rotor position will definitely not develop

A rotating electrical machine having its self-inductance of both stator and rotor winding independent of its rotor position will definitely not develop

### Right Answer is: Reluctance torque

#### SOLUTION

If the induction is constant irrespective of rotor position that means reluctance is constant.  The self-inductance of the winding is independent of the position of the rotor due to the round and symmetric shape of the rotor. The stator, i.e., the armature has a cylindrical structure. Hence, the self-inductance of the rotor field winding will not depend upon the position of the rotor and will be a constant one.

In cylindrical machines, the rotor as well as stator is round with a uniform air gap. If the effects of slots on the stator and rotor are neglected, the reluctance of the magnetic path is independent of the position of the rotor Therefore, self-inductance constant and no reluctance torque will be produced.

As the rotor is cylindrical, the reluctance by the stator-produced flux will be the same irrespective of the rotor position. Hence No reluctance torque can be produced.

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