The generating set includes wheel rotor, stub stator, wheel axis, stator slide way, sliding rack, and clutch of stator. The wheel rotor is composed of wheels, rotor, fan or centrifugal wheel, and shield. Stub stator includes stator, end plates, and rectifier. One side of clutch of stator is installed on end plate, and the other end if installed on stator. Based on different instances, such as ascent load, operation at low speed, uncrowned road, or downhill load, the makes stator separate fro or combine to rotor automatically through control system. Thus, using energy of inertia and downward subduction force, the invention can generate electric energy without affecting speed and load. Features are: repetitive cycling power generation, saving energy, and lowing pollution. The generating set is applicable to hybrid motor vehicles, military vehicles, new type motorcycles, and bicycles, even train.