Electrical – AC induction motor circuit and stall current

Now, how can i further simplify the equivalent circuit of the three phase motor

Try this one: -

Taken from here

A standard 3-phase, AC motor has the stator windings distributed in the slots to form poles that do not have much saliency. A switched reluctance motor has both salient rotor poles and salient stator poles. You would need to rewind the stator to have a motor like that.

A synchronous reluctance motor has a salient-pole rotor, but distributed windings in the stator to form non-salient poles. To convert an induction motor to a synchronous reluctance motor, you could use the stator as it is and machine the rotor to look something like this:

You can get some induction-motor starting torque from the remaining rotor bars, but the best way to operate the motor would be with a variable-frequency drive (VFD). The VFD will provide reluctance torque from stand-still. That may or may not suit your purpose.

Of course, you may have some difficulty with rotor balance.