Patent ID: 8274189
Filing Date: 2012-09-25
Classification: H02K

Abstract:
1. A permanent magnet motor, comprising a stator and a rotor rotatably mounted to the stator, one of the stator and the rotor comprising a housing and at least one magnet providing magnetic poles fixed to an inner surface of the housing, a radial cross section of the housing comprising n side portions and n connecting portions, where n is an integer greater than 2, adjacent side portions being connected together by one corresponding connecting portion, and the magnetic poles being located at locations corresponding to the connecting portions, wherein each of two circumferential ends of the radial cross section of each side portion has a curvature different from that of the radial cross section of each connection portion, and the radial cross section of each side portion is like a convex curve line, which is curved outwardly with respect to a straight line passing through the two circumferential ends of the convex curve line.