Patent ID: 9166449
Filing Date: 2015-10-20
Classification: H02K

Abstract:
1. A rotor, comprising: a first rotor core including a substantially disk-shaped first core base and a plurality of primary claw-shaped magnetic poles formed at equal intervals on an outer peripheral part of the first core base, the primary claw-shaped magnetic poles protruding radially outward and extending in an axial direction; a second rotor core including a substantially disk-shaped second core base and a plurality of secondary claw-shaped magnetic poles formed at equal intervals on an outer peripheral part of the second core base, the secondary claw-shaped magnetic poles protruding radially outward and extending in the axial direction and each secondary claw-shaped magnetic pole being arranged between corresponding primary claw-shaped magnetic poles; and a field member arranged between the first core base and the second core base in the axial direction, wherein, when magnetized in the axial direction, the field member causes the primary claw-shaped magnetic poles to function as primary magnetic poles and the secondary claw-shaped magnetic poles to function as secondary magnetic poles; and auxiliary magnets each of which is arranged in one of a clearance formed by the back surface of one of the claw-shaped magnetic pole and a clearance between one of the primary claw-shaped magnetic poles and the corresponding one of the secondary claw-shaped magnetic poles in a circumferential direction, wherein at least the auxiliary magnets or the field member is formed integrally with at least one of the first rotor core and the second rotor core.