Wind power generator with outer rotor contained in nave

The utility model relates to a wind power generator, in particular to a wind power generator with an external rotor inside of a wheel boss. A distributed wind wheel vane is arranged on the outer circle of the wheel boss; besides, a permanent magnet body is arranged in the inner cavity of the wheel boss; the design makes the external rotor enveloped inside of the wheel boss; a stator is arranged in the inner cavity of the wheel boss; the stator is fixed and connected on the machine seat of the wind power generator; a supported rotor bearing is respectively arranged on the position of the front support and the rear support of the wheel boss on the axis of the stator. The wheel boss adopts a lamella-separated structure. The utility model makes the wheel boss of the wind power generator and the external rotors of the generator integrate together; the axis-direction length for the whole structure is short; the wheel boss adopts a lamella-separated structure so as to be easy for transportation. The utility model can be widely applied in the wind power generating system with megawatt level. The device is compact in the structure, high in the reliability and low in the maintenance cost. Compared with the existing traditional wind power generator, the quality for the whole machine decreases 40-50%; and the raw material and the manufacture cost are also much lower.