Patent ID: 9041269
Filing Date: 2015-05-26
Classification: H02K

Abstract:
1. A motor comprising: a rotor including a rotor core, a plurality of magnets arranged at equal intervals in a circumferential direction of the rotor core and functioning as a first magnetic pole, where each magnet of the plurality of magnets has substantially similar magnetization, and salient poles integrated with the rotor core, each arranged between adjacent magnets and at a distance from the magnets, the salient poles functioning as a second magnetic pole, where each of the salient poles has substantially similar magnetization and the substantially similar magnetization of each of the salient poles is opposing in polarity to the substantially similar magnetization of each of the magnets; and a stator arranged outside the rotor in a radial direction and having a stator core having a plurality of teeth extending in the radial direction of the stator and arranged at equal intervals in a circumferential direction, and multi-phase coils attached to the teeth, wherein the salient poles are arranged to have center portions arranged at equal intervals in the circumferential direction and each have an outer surface extending in the circumferential direction in a range of a predetermined opening angle having an axis of the rotor as a center, the salient poles include a first salient pole and a second salient pole, and the first salient pole and the second salient pole are at different positions in an axial direction of the rotor, and wherein a first opening angle serving as an opening angle of the outer surface of the first salient pole is different from a second opening angle serving as the opening angle of an outer surface of the second salient pole.