Abstract
The authors invented a superior wind power unit, which is composed of tandem wind rotors and a double rotational armature type generator without the conventional stator. The large-sized front wind rotor and the small-sized rear wind rotor drive respectively the inner and the outer armatures of the generator, in keeping the rotationl torque counter-balanced. In this paper discusses the performance of tandem wind rotors and the rotational behavior of tandem wind rotors. It was verified that the output is higher and is kept constant to keep in the rated operating made without the brake mechanisms.