we want to drive generator by ac motor which is electrically connected to the same generator
Its against the low of thermodynamics.Its Possible only with a machine whos input and out put power are equal.Every machine has losses so its not possible.
It is impossible, as there are losses or, in other words, the equipments are not 100% efficient. You have losses due to friction on the rotating parts, you have losse also on heat generated, so not all energy from that motor is applied on the ghenerator and not all energy applied on the generator will reach the motor.
of course; you just need a motor and a generator that are more than 100% efficient. Good luck finding them! Maybe you could design your own?
