Rotor and motor

摘要

A rotor includes first and second rotor cores, a disk magnet, and a rectifying magnet. The first and second rotor cores each include a core base and claw-poles. The disk magnet is magnetized in the axial direction so that the claw-poles of the first rotor core function as first poles and the claw-poles of the second rotor core function as second poles. The rectifying magnet includes at least an inter-pole magnet portion or a back-surface magnet portion. The inter-pole magnet portion is located in a gap formed in the circumferential direction between the claw-poles of the first rotor core and the claw-poles of the second rotor core. The back surface magnet portion is located in a gap formed at back surfaces of the claw-poles. The rectifying magnet and the disk magnet are formed from different materials. The rectifying magnet is integrated with the disk magnet in a post-process.

主权项

1. A rotor comprising:
first and second rotor cores, each including a generally disk-shaped core base and a plurality of claw-poles, wherein the claw-poles are arranged at equal intervals on an outer circumference of the core base, each of the claw-poles projects toward an outer side in a radial direction and extend in an axial direction, the core bases of the first and second rotor cores are opposed to each other, and the claw-poles of the first and second rotor cores are alternately arranged in a circumferential direction; a disk magnet arranged between the core bases in the axial direction, wherein the disk magnet is magnetized in the axial direction so that the claw-poles of the first rotor core function as first poles and the claw-poles of the second rotor core function as second poles; and a rectifying magnet including at least one of an inter-pole magnet portion and a back-surface magnet portion, wherein the inter-pole magnet portion is located in a gap formed in the circumferential direction between the claw-poles of the first rotor core and the claw-poles of the second rotor core, and the back surface magnet portion is located in a gap formed at back surfaces of the claw-poles, wherein the rectifying magnet is magnetized in a direction different from the axial direction, the rectifying magnet and the disk magnet are formed from different materials, and the rectifying magnet is integrated with the disk magnet in a post-process.