we have an idea to design an induction motor.it have two seperate windings in stator. one will perform motor action and another will perform generator action.the rotor is made up of copper bars.so we get both mechanical and electrical output.will it be an energy efficient one?

 

Will the stator field be at 90* leading the rotor? Also what is the air gap flux? Slip value? Number of poles? How much torque at steady state operation

 

Not feasible.

 

Perpetual motor/over-unity devices are not feasible. You can't bypass the laws of physics.

 

Yeah, that's what I was wondering... is this supposed to selectively serve as a motor and a generator, or is this some sort of attempt at making a perpetual motion machine? If it's the latter, then definitely not.

 

I don't know what your application is, but if you're trying to get something that can simultaneously act as a motor and a generator, your best option is just to switch back and forth from your power source to your charging load electronically in a very quick manner. Mixing your windings will just add complexity and difficulty. You probably won't get very much efficiency out of it either.

If your purpose is for perpetual motion, it won't work and I'll explain why if you will ask.

 

The problem is how will you define the coil slot. You cannot have a motor coil in the same slot as a generator coil. The number of problems are ridiculous, ie buckling of the core, leakage flux in the yoke, very high circulating currents in the "none operating coil", selection of the lamination, wedging issues, etc.