Patent ID: 8350433
Filing Date: 2013-01-08
Classification: H02K

Abstract:
1. An electric motor comprising: a stator including a stator core having a yoke and a plurality of teeth protruded from the yoke, which is formed with a plurality of slots being S between the teeth being adjacent to each other, and winding wound around the stator core; and a rotor rotatably held against the stator, having a rotor core and a plurality of magnetic poles being P and held by the rotor core and confronting tip ends of the teeth via gaps, wherein the rotor core is formed by rotor core materials circumferentially equally divided into a predetermined plural number of divisions being D; P is not equal to D; P is greater than D and S; and the least common multiple being N for the number of slots and the number of magnetic poles, and the least common multiple being M for the number of the slots and the number of the divisions, then N is equal to M.