Patent ID: 9143013
Filing Date: 2015-09-22
Classification: H02K

Abstract:
1. A motor comprising: a rotor having an axial direction, the rotor comprising: at least a pair of rotor cores arranged in the axial direction; and a field magnet arranged between the rotor cores and magnetized in the axial direction, wherein each of the rotor cores includes a plurality of claw poles extending in the axial direction, and each of the rotor cores are configured to appropriately cause a magnetic flux to flow to the claw poles, and a stator around which a coil is wound, the stator having an annular stator core located outside of the rotor in its radial direction, wherein an axial length of the rotor core of the rotor is greater than an axial length of the stator core, auxiliary magnets are located on the back surfaces of the claw poles, the claw poles of a first rotor core of each pair of the rotor cores extend in the axial direction to an axial outer end surface of a second rotor core of the pair, the claw poles of the second rotor cores extend to axial outer end surfaces of the first rotor cores in the axial direction, and the axial outer end surface of each of the auxiliary magnets protrudes from a corresponding axial outer end surface of the stator core in the axial direction.