| 主权项 |
1. A rotor for a rotary electric machine, comprising:
a rotor core including a plurality of magnetic poles provided at intervals in a circumferential direction of the rotor core and at an outer periphery of the rotor core, wherein each of the magnetic poles includes: a central magnet provided in the vicinity of an outer peripheral face of the rotor core, a pair of circumferential-direction magnets disposed on both sides of the central magnet in the circumferential direction such that a mutual spacing between the pair widens towards an outer periphery of the rotor core, a pocket portion having a lower permeability than that of a magnetic material of which the rotor core is made, disposed at an outer periphery side of each of the circumferential-direction magnets, and a low permeability region provided in the vicinity of each of end portions of the central magnet in the circumferential direction, and having a permeability lower than that of the magnetic material, of which the rotor core is made, and the rotor core is formed in such a manner that a width of a magnetic path entrance portion that is formed between a magnetic-pole inward side face, which is an inward side face of each of the circumferential-direction magnets and an inward side face of each of the pocket portions in the circumferential direction of the magnetic pole, and the low permeability region adjacent to the magnetic-pole inward side face becomes narrower towards the outer peripheral face of the rotor core, where the magnetic-pole inward side face has a straight-line shape formed by one inward side face of the circumferential-direction magnet and one inward side face of the pocket portion. |
