Patent ID: 9190877
Filing Date: 2015-11-17
Classification: H02K

Abstract:
1. A rotor for a rotating electric machine, the rotor comprising: a rotor core configured to be disposed in radial opposition to a stator of the rotating electric machine, the rotor core having a plurality of pairs of magnet-receiving holes formed therein, each pair of the magnet-receiving holes being arranged in a substantially V-shape that opens toward the stator side, the substantially V-shape having its two sides respectively extending in width directions of the two magnet-receiving holes of the pair; and a plurality of magnets each of which is received in a corresponding one of the magnet-receiving holes of the rotor core, wherein for each pair of the magnet-receiving holes of the rotor core, the two corresponding magnets which are respectively received in the two magnet-receiving holes of the pair are arranged so as to together form one magnetic pole of the rotor, the magnetic pole having a centerline C1 that extends in a radial direction of the rotor core and bisects the magnetic pole in a circumferential direction of the rotor core, the rotor core further has, for each of the magnet-receiving holes, a magnetic flux barrier that is formed, at a centerline C1-side end of a stator-side wall surface of the magnet-receiving hole, so as to protrude from the stator-side wall surface toward the stator side, the stator-side wall surface extending in the width direction of the magnet-receiving hole, and a protruding height H of the magnetic flux barrier from the stator-side wall surface of the magnet-receiving hole in a direction perpendicular to the stator-side wall surface is set to be in the following range: where R is a minimum distance from an intersection P1, which is between the centerline C1 of the magnetic pole and a rotor-side circumferential surface of the stator, to the stator-side wall surface of the magnet receiving hole.