Claw-pole electric generator and bicycle electric generator hub

摘要

A claw-pole electric generator 20 has a circumferentially arranged permanent magnet 41, a ring-shaped coil 44, a yoke 46 and a cover member 49. The yoke surrounds an external periphery of the coil. The yoke has a stator yoke portion 47 and a core yoke portion 48. The stator yoke portion is disposed between the coil and the permanent magnet. The core yoke portion is magnetically linked to the stator yoke portion. The core yoke is disposed on the external periphery of the coil. The coil and the yoke are rotatably disposed in relation to the permanent magnet. The stator yoke portion includes a plurality of first and second yoke sections 60, 61 having a plurality of plate-shaped pieces 62 in a stacked arrangement on opposite sides of the coil in an axial direction. The cover member covers at least part of an external peripheral surface of the yoke section.