Claw pole generator and bicycle generator hub

摘要

Claw pole generator (20) comprising: a circularly arranged permanent magnet (41); an inner stationary unit (42) comprising an annular winding (44) disposed radially inwardly of the permanent magnet (41), and a yoke (46) surrounding a perimeter of the winding (44), the permanent magnet (41) being rotatable with respect to inner stationary unit (42) is arranged, wherein the yoke (46) comprises a stator yoke (47) and a core yoke (48), the stator yoke (47) being disposed between the winding (44) and the permanent magnet (41) and the core yoke (48) radially inward of the winding (44) is arranged and magnetically coupled to the stator yoke (47), wherein the stator yoke (47) comprises a first laminated yoke (60) and a second laminated yoke (61), wherein each of the first and second laminated yokes (60, 61) comprises at least two plate-like parts (62) substantially adjacent to one another without Spaced apart and having a substantially circular disc-like connecting portion (62a) disposed on one side of the coil (44), and a plurality of outer peripheral yoke portions (62b) formed on an outer circumferential surface of the connecting portion (62a) having a single bend folded at an angle of substantially 90 degrees and which are arranged between the winding (44) and the permanent magnet (41) with intermediate circumferential spaces, and wherein the connecting portions (62a) of each of the first and second laminated yokes (60, 61) are stacked in an axial direction with respect to an axial center line of the winding (44), and wherein each of the outer circumferential yoke portions (62b) has a plurality of outer circumferential yoke layers (62). 62b1, 62b2, 62b3, 62b4, 62b5, 62b6) which are laminated over each other along a radial direction with respect to the axial center line of the coil (44), each of the outer peripheral yoke portions (62b) having a outermost (62b1) of the outer circumferential yoke layers (62b1, 62b2, 62b3, 62b4, 62b5, 62b6) closest to the permanent magnet (41) and having a longer axial length than an innermost (62b6) of the outer circumferential yoke layers (62b3, 62b4, 62b5, 62b6).