| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a structure of a hub dynamo which meets a need for miniaturization of hub dynamos. <P>SOLUTION: A hub dynamo 10 includes a stator unit 20 fixed to a hub shaft 11, and a rotor unit 40 fixed to a dynamo case 12. The rotor unit 40 includes a disk-shaped magnet 41 arranged in parallel with the stator unit 20 and provided with heteropolar pole faces on opposite surfaces, and rotor yokes 42, 43 in close contact with respective surfaces of the magnet 41. The rotor yokes 42, 43 are provided with pluralities of pole pieces 42b, 43b surrounding an outer circumference of the stator unit 20. The pole pieces 42b and the pole pieces 43b are arranged alternately. The three of the magnet 41, the rotor yoke 42 and the rotor yoke 43 are coupled by means of a coupler 44. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
