Permanent magnet motor, the drive-integrated permanent magnet motor and a method of manufacturing a permanent magnet motor

摘要

The present invention provides a driving apparatus-integrated permanent magnet motor that can achieve reconciliation of reductions in size and increases in output with reductions in vibration and noise. A permanent magnet motor according to the present invention includes: a stator including: a stator core in which teeth are respectively arranged circumferentially so as to protrude radially inward from an annular core back; an armature winding that is mounted to the stator core; and a frame that holds the stator core in an internally fitted state; and a rotor that includes a rotor core and permanent magnets, the armature winding being constituted by a plurality of coils that are respectively wound so as to be concentrated on the teeth, wherein: inner circumferential ends of adjacent teeth are connected together by a connecting portion; and 0.122 ‰¤ ( t2 + t3 )/ r4 ‰¤ 0.202 is satisfied, where t2 is a thickness of the core back, t3 is a thickness of the frame, and r4 is an outside radius of the frame.