Device and method for driving power generator to generate power by electromotor

The invention discloses a device and method for driving a power generator to generator power by a motor. The power generator dev9ce comprises an electromotor, a generator and a power supply control case; the electromotor is connected to the generator through a rotor and the electromotor and the generator are in a same vertical plane; a current output terminal of the generator is connected to the power supply control box; and a circuit integrated board and a power switching module are installed inside the power supply box. The device for driving the power generator to generate power by the electromotor realizes continuous normal working and generating; generating power of normal working of the power generator is greater than a normal operation load of the electromotor for driving the power generator, and the difference value between the output power of the power generator and the normal operation load of the electromotor for driving the power generator is utilized to realize a social value of the device for dr