Wind power generator

Abstract

A transmission 3 is provided between a propeller that catches wind to rotate and a generator 5 which is a friction roller transmission of the wedge type functioning as a speed increaser whereby a structure with good generating efficiency is realized with low noise for use in a normal home etc.

1 . A wind-powered generating apparatus comprising a propeller for receiving wind and being turned by the wind, a transmission having an input shaft and an output shaft, such that the propeller is connected to the end of the input shaft, and a generator driven by the output shaft of the transmission to rotate, and where the transmission is a wedge-action type traction-roller transmission, the transmission comprising an outer ring rotating as the input shaft rotates and having an inner peripheral surface formed with a drive-side cylindrical surface, a center roller rotating together with the output shaft and having an outer peripheral surface formed with a driven-side cylindrical surface, such that an annular space is formed between the driven-side cylindrical surface and the driving-side cylindrical surface, a plurality of support shafts provided in the annular space in parallel with the center roller, and a plurality of intermediate rollers rotatably supported by the support shafts and having an outer peripheral surface formed with a drive-force-transmission cylindrical surface, wherein by making the center of the center roller eccentric with the center of the input shaft and outer ring, the radial width size of the annular space is uneven in the circumferential direction, wherein one of the intermediate rollers is a movable roller which is movable in the circumferential direction in the annular space with the remaining intermediate rollers being a guide roller, and wherein when the center roller and outer ring rotate in a predetermined direction at a speed corresponding to a transmission rate between the output shaft and the input shaft, the intermediate roller for the movable roller can be moved toward the narrow width portion in the annular space.  
     
     
         2 . The wind-powered generating apparatus of  claim 1 , wherein the transmission and the generator are enclosed in a main unit which is supported in a bracket so as to rock around a horizontal axis, the bracket being rotatably supported around a vertical axis, and the main unit being provided with a restoring force in a direction such that the axis of rotation center of the propeller is made smaller in tilting angle with reference to the horizontal direction.  
     
     
         3 . The wind-powered generating apparatus of  claim 1 , wherein the generator is an axial-type slotless generator comprising a generator case, a rotating shaft rotatably supported in the generator case to rotate with the output shaft of the transmission, a plurality of yokes fixed to the outer peripheral surface of the rotating shaft with a space in the axial direction and made of a magnetic material, a permanent magnet supported by an axial side surface of the yokes and having S-poles and N-poles alternately arranged in a circumferential, a plurality of coil holders fixed to the inner peripheral surface of the generator case at a section where the phase with respect to the axial direction is separated from the yokes, and coils each facing the permanent magnet and supported by an axial side surface of the coil holders.  
     
     
         4 . A wind-powered generating apparatus comprising a propeller that catches the wind to rotate, and a generator that is operated and driven by the propeller; and where the generator is an axial-type slotless generator that comprises: a generator case; a rotating shaft that is supported inside the generator case such that it can freely rotate together with the output shaft of the transmission; a plurality of yokes made of a magnetic material and that are fastened at intervals in the axial direction around the outer peripheral surface of the rotating shaft; permanent magnets that are supported by the sides in the axial direction of the yokes and which are arranged such that the S-poles and N-poles alternate in the circumferential direction; a plurality of coil holders that are fastened to the inner peripheral surface of the generator case in the section where the phase in the axial direction is away from the yokes; and a plurality of coils held on each of the sides in the axial direction of each coil holder such that they face the permanent magnets.  
     
     
         5 . The wind-powered generating apparatus of  claim 2 , wherein the generator is an axial-type slotless generator comprising a generator case, a rotating shaft rotatably supported in the generator case to rotate with the output shaft of the transmission, a plurality of yokes fixed to the outer peripheral surface of the rotating shaft with a space in the axial direction and made of a magnetic material, a permanent magnet supported by an axial side surface of the yokes and having S-poles and N-poles alternately arranged in a circumferential, a plurality of coil holders fixed to the inner peripheral surface of the generator case at a section where the phase with respect to the axial direction is separated from the yokes, and coils each facing the permanent magnet and supported by an axial side surface of the coil holders.