Patent ID: 7233089

Claim:
A permanent magnet rotating electric machine, comprising: a stator; and a rotor rotatably arranged with a predetermined gap to said stator, said rotor including, a rotary shaft; a rotor core provided on said rotary shaft; a plurality of permanent magnets embedded internally into said rotor core, forming a plurality of magnetic poles: a plurality of permanent-magnet-inserting holes in which respective ones of the plurality of permanent magnets are held; a plurality of slits formed in said rotary core on a side of said stator facing the permanent-magnet-inserting holes for each of said magnetic poles; and a plurality of auxiliary magnetic poles arranged alternating with said plurality of magnetic poles in a circumferential direction of said rotor core, to generate reluctance torque; wherein, the permanent-magnet-inserting holes in each of said plurality of magnetic poles have a cross-sectional shape that is concave in a radially outward direction facing said stator; the permanent magnet in each of the magnetic poles is divided into a plurality of permanent magnet pieces in the direction of a rotary axis; said plurality permanent magnet pieces are inserted into the plurality of permanent-magnet-inserting holes forming each of the magnetic poles; and said permanent magnet pieces are arranged asymmetrically with respect to the direction of the rotary axis in each of said magnetic poles.