As you connect the motor to a generator, there is a energy transfer form the generator to the motor. As you connect more motors to the genertor, more energy is needed to transfer form the generator to the motors.
In your idea, energy cannot be created. You just transform the energy from kinetic energy (KE) to electric (E), and then from E to KE and then .... From the point of energy conservation, you will never creat energy.
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