Patent ID: 8278794
Filing Date: 2012-10-02
Classification: H02K,Y10T

Abstract:
1. An axial gap motor comprising: a rotor rotatable around a rotational axis; and a stator disposed to be opposed to the rotor from at least one side of an axial direction of the rotational axis, wherein the rotor includes: a plurality of main magnets respectively magnetized in the axial direction and disposed at predetermined intervals in a peripheral direction of the rotor; a plurality of yokes structured by a laminated member produced by winding a tape-shaped electromagnetic steel plate and respectively disposed on the plurality of main magnets on said at least one side of the axial direction; and a rotor frame including a plurality of ribs respectively disposed between the main magnets adjoining each other in the peripheral direction and extending in a radial direction of the rotor and at least one of an inner cylindrical portion and an outer cylindrical portion respectively disposed on an radially inner side of the ribs and on an radially outer side of the ribs, and being made of a die-cast alloy, wherein the rotor further comprises a plurality of sub magnets respectively interposed between the yokes adjoining each other in the peripheral direction and respectively disposed in a plurality of sub magnet storing portions of the laminated member respectively formed inwardly of axial side surface of the yokes, the plurality of sub magnets respectively being magnetized in a direction perpendicular to the axial direction and the radial direction, and wherein the rotor frame further comprises sub magnet hold portions that respectively make contact with the sub magnets from sides of the axial side surfaces of the yokes.