Patent ID: 9735636
Date: 2017-08-15
CPC Classifications: H02K

Claim:
1. A rotor for a dynamo-electric machine, comprising: a shaft; a rotor core that is fitted to the shaft and is fixed to the shaft; and a plurality of permanent magnets that are located on a radially outer side of the rotor core and are intermittently arranged in a circumferential direction while the plurality of permanent magnets is fixed to the rotor core at a plurality of predetermined portions, respectively, of the rotor core, wherein: one of each permanent magnet and a corresponding one of the plurality of predetermined portions of the rotor core, which are radially opposed to each other, includes a projection that projects toward the other one of each permanent magnet and the corresponding one of the plurality of predetermined portions of the rotor core; an inner peripheral surface of each permanent magnet, which is radially opposed to the corresponding one of the plurality of predetermined portions of the rotor core, includes: each of the plurality of predetermined portions of the rotor core includes the projection, which projects toward the corresponding one of the plurality of permanent magnets; each of the plurality of permanent magnets includes a recess, which is radially opposed to the projection of the corresponding one of the plurality of predetermined portions of the rotor core; a bottom surface of the recess of each of the plurality of permanent magnets forms the primary contacting portion, which contacts the projection of the corresponding one of the plurality of predetermined portions of the rotor core; a circumferentially outer end of each of the two primary non-contacting portions in the inner peripheral surface of each permanent magnet is separated from the rotor core by a gap formed between each of the two primary non-contacting portions and the rotor core, and each of the two primary non-contacting portions in the inner peripheral surface of each permanent magnet is bent radially inward relative to the primary contacting portion of the permanent magnet.