Patent ID: 7405504
Filing Date: 2008-07-29
Classification: H02K

Abstract:
1. A rotor for a rotary electric machine, comprising: a rotor core made of magnetic material, and being in the form of a disk; and a plurality of magnet sets each including a pair of permanent magnets whose polarities are identical to each other, the magnet sets being arranged circumferentially in the rotor core so that the polarities of the magnet sets change alternately; the rotor core including nonmagnetic portions each formed between adjacent two of the magnet sets, wherein adjacent two of the permanent magnets of the same polarity extend radially, and are arranged circumferentially at a predetermined angle, wherein the rotor core includes slits; adjacent two of the slits extend in parallel to a radial direction of the rotor core, circumferentially between adjacent two of the permanent magnets of the same polarity, and each of the slits includes a branch portion extending toward one of the nonmagnetic portions alongside one of the adjacent two of the permanent magnets.