Power transmission device

Abstract

A power transmission device includes: a high speed magnet rotor which includes a magnet array which is magnetized in a radial direction; a low speed magnet rotor which includes a magnet array which is magnetized in a circumferential direction; and an inductor rotor which allows magnetic fluxes from the magnet array of the high speed magnet rotor to pass, and the high speed magnet rotor, the low speed magnet rotor and the inductor rotor are concentrically arranged and the magnet array of the low speed magnet rotor is formed such that homopolar surfaces of neighboring magnets face each other in the circumferential direction.

1 . A power transmission device comprising:
 a high speed magnet rotor which comprises a magnet array which is magnetized in a radial direction;   a low speed magnet rotor which comprises a magnet array which is magnetized in a circumferential direction; and   an inductor rotor which allows a magnetic flux of the magnet array of the high speed magnet rotor to pass,   wherein the high speed magnet rotor, the low speed magnet rotor and the inductor rotor are concentrically arranged, and   the magnet array of the low speed magnet rotor is formed such that homopolar surfaces of neighboring magnets face each other in the circumferential direction.   
     
     
         2 . The power transmission device according to  claim 1 , wherein the inductor rotor is arranged in an outermost periphery portion, the high speed magnet rotor is arranged in an innermost periphery portion and the low speed magnet rotor is arranged between the inductor rotor and the high speed magnet rotor. 
     
     
         3 . The power transmission device according to  claim 1 , wherein the low speed magnet rotor is arranged in an outermost periphery portion, the high speed magnet rotor is arranged in an innermost periphery portion and the inductor rotor is arranged between the low speed magnet rotor and the high speed magnet rotor. 
     
     
         4 . The power transmission device according to  claim 1 , wherein the high speed magnet rotor is arranged in an outermost periphery portion, the inductor rotor is arranged in an innermost periphery portion and the low speed magnet rotor is arranged between the high speed magnet rotor and the inductor rotor. 
     
     
         5 . The power transmission device according to  claim 1 , wherein the high speed magnet rotor is arranged in an outermost periphery portion, the low speed magnet rotor is arranged in an innermost periphery portion and the inductor rotor is arranged between the high speed magnet rotor and the low speed magnet rotor. 
     
     
         6 . The power transmission device according to  claim 1 ,
 wherein the high speed magnet rotor, the low speed magnet rotor and the inductor rotor have cylindrical shapes which have different outer diameters from each other, and the high speed magnet rotor, the low speed magnet rotor and the inductor rotor are concentrically arranged with fixed gaps.   
     
     
         7 . The power transmission device according to  claim 1 , wherein all of the high speed magnet rotor, the low speed magnet rotor and the inductor rotor are all rotatably supported independently, or one of the high speed magnet rotor, the low speed magnet rotor and the inductor rotor is fixed and other two are rotatably supported. 
     
     
         8 . The power transmission device according to  claim 1 , wherein the magnet array which the high speed magnet rotor comprises includes permanent magnets which have a plurality of arc shapes. 
     
     
         9 . The power transmission device according to  claim 1 , wherein the magnet array which the high speed magnet rotor comprises includes permanent magnets which have a plurality of flat shapes. 
     
     
         10 . The power transmission device according to  claim 9 , wherein magnetizing directions of the permanent magnets of the plurality of flat shapes are an identical direction. 
     
     
         11 . The power transmission device according to  claim 10 , wherein the magnet array which the high speed magnet rotor comprises includes an internal magnet structure. 
     
     
         12 . The power transmission device according to  claim 1 , wherein, in the magnet array which the low speed magnet rotor comprises, permanent magnets of a plurality of flat shapes whose magnetizing directions are the circumferential direction of the low speed magnet rotor are arranged through a magnetic body portion which the low speed magnet rotor comprises. 
     
     
         13 . The power transmission device according to  claim 1 , wherein one of an inner periphery side or an outer periphery side of the inductor rotor comprises a plurality of magnetic teeth which projects toward the inner periphery side or the outer periphery side. 
     
     
         14 . The power transmission device according to  claim 1 , wherein
 a number of poles of the high speed magnet rotor is 2a (a is a natural number),   a number of poles of the low speed magnet rotor is 2b (b is a natural number higher than a),   a number of poles of the inductor rotor is c (c=b+d*a where d=±1),   a rotation speed of the high speed magnet rotor is α,   a rotation speed of the low speed magnet rotor is β, and   a rotation speed of the inductor rotor is γ,   a relationship between the rotation speeds of the three motors satisfies a following equation
     a ·α=( a−c·d )·β+ c·d·γ.  
 
   
     
     
         5 . A power transmission device comprising:
 a high speed magnet rotor which comprises a magnet array which is magnetized in a radial direction;   a low speed magnet rotor which comprises a magnet array which is magnetized in a circumferential direction; and   contra-inductor rotors which allow a magnetic flux of the magnet array of the high speed magnet rotor to pass,   wherein the high speed magnet rotor, the low speed magnet rotor and the contra-inductor rotors are concentrically arranged, and   the magnet array of the low speed magnet rotor is formed such that homopolar surfaces of neighboring magnets face each other in the circumferential direction.   
     
     
         16 . The power transmission device according to claim  15 , wherein one of the contra-inductor rotors is arranged in an outermost periphery portion, the high speed magnet rotor is arranged in an innermost periphery portion, another one of the contra-inductor rotors is arranged on an inner side of the high speed magnet rotor and the low speed magnet rotor is arranged between the two contra-inductor rotors. 
     
     
         17 . The power transmission device according to claim  15 , wherein one of the contra-inductor rotors is arranged in an innermost periphery portion, the high speed magnet rotor is arranged in an outermost periphery portion, another one of the contra-inductor rotors is arranged on an inner side of the high speed magnet rotor and the low speed magnet rotor is arranged between the two contra-inductor rotors. 
     
     
         18 . The power transmission device according to claim  15 , wherein the two contra-inductor rotors are mechanically connected. 
     
     
         19 . A power transmission device comprising:
 a high speed magnet rotor which comprises a magnet array which is magnetized in a radial direction;   contra-low speed magnet rotors which comprise magnet arrays which are magnetized in a circumferential direction; and   an inductor rotor which allows a magnetic flux of the magnet array of the high speed magnet rotor to pass,   wherein the high speed magnet rotor, the contra-low speed magnet rotors and the inductor rotor are concentrically arranged, and   the magnet array of the low speed magnet rotor is formed such that homopolar surfaces of neighboring magnets face each other in the circumferential direction.   
     
     
         20 . The power transmission device according to  claim 19 , wherein the high speed magnet rotor is arranged in an outermost periphery portion, one of the contra-low speed magnet rotors is arranged in an innermost periphery portion, another one of the contra-low speed magnet rotors is arranged on an inner side of the high speed magnet rotor and the inductor rotor is arranged between the two contra-inductor rotors. 
     
     
         21 . The power transmission device according to  claim 19 , wherein one of the contra-low speed magnet rotors is arranged in an outermost periphery portion, the high speed magnet rotor is arranged in an innermost periphery portion, another one of the contra-low speed magnet rotors is arranged on an outer side of the high speed magnet rotor and the inductor rotor is arranged between the two contra-low speed magnet rotors. 
     
     
         22 . The power transmission device according to  claim 19 , wherein the two contra-low speed magnet rotors are mechanically connected. 
     
     
         23 . A wind turbine generator, wherein the power transmission device according to  claim 1  is used. 
     
     
         24 . An air blowing device, wherein the power transmission device according to  claim 1  is used. 
     
     
         25 . An in-wheel motor, wherein the power transmission device according to  claim 1  is used.