Abstract: A windmill 10 includes a frame 11 and a rotor 12 provided rotatively around the vertical shaft center. The rotor includes bosses 23, 24 located above and below, plural transversal blades 25 extending radially from the bosses, longitudinal blades 26 held by the front edges of the transversal blades 25 of both above and below bosses. The frame includes bearing 19, 20 supporting the bosses 23, 24 of the rotor rotatively around the vertical shaft center, spokes 17 provided radially supporting the bearing, and legs 15 holding the spoke 17 away from the ground. In the lower bearing 20, a generator connected to the boss 24 of the rotor 12 is accommodated.

Abstract: A wind power generator 10 comprising a frame 11, an impeller 12 supported rotatably by the frame, power generators 34 driven to rotate by the impeller, and a controller 40 for selecting some ones from among transmission wires 36, 37 led from the power generators 34 by connect/disconnect them. The impeller 12 is supported by a vertically extending shaft 22, to which a main gear 31 is connected. The frame 11 has rotatable sub gears 32 meshed with the main gear 31, and the shafts 34 of the sub gears 32 are connected to the power generators 34. The controller 40 has a rotation sensor 41 for sensing the wind velocity or the rotational speed of the impeller, and disconnects the transmission wires 36, 37 when the rotational speed decreases, thereby reducing the number of power generators 34 being operating.

Abstract: A windmill 10 includes a frame 11 and a rotor 12 provided rotatively around the vertical shaft center. The rotor includes bosses 23, 24 located above and below, plural transversal blades 25 extending radially from the bosses, longitudinal blades 26 held by the front edges of the transversal blades 25 of both above and below bosses. The frame includes bearing 19, 20 supporting the bosses 23, 24 of the rotor rotatively around the vertical shaft center, spokes 17 provided radially supporting the bearing, and legs 15 holding the spoke 17 away from the ground. In the lower bearing 20, a generator connected to the boss 24 of the rotor 12 is accommodated.