PERMANENT-MAGNET ROTARY ELECTRIC MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a powerful permanent-magnet rotary electric machine by suppressing an increase in iron loss due to armature-reaction magnetic flux and making effective use of reluctance torque. SOLUTION: The permanent-magnet rotary electric machine comprises a stator wherein armature windings are installed in a plurality of slots formed in a stator core; and a rotor wherein permanent magnets 5 are housed in a plurality of permanent magnet insertion holes formed in a rotor core. A rotor core 2 is provided with recessed portions 7 which are formed between magnetic poles (between magnets) in proximity to the circumferential surface of the rotor core with the permanent magnets 5 housed therein; and air gaps 20 which are formed in the rotor core between magnetic poles (between magnets) and suppresses the flow of armature-reaction magnetic flux produced by the armature winding. The rotor core 2 is combined with a rotor core 3 provided only with a reluctance magnetic circuit, and a magnetic path for armature-reaction magnetic flux is thereby defined. COPYRIGHT: (C)2004,JPO