Patent ID: 8987954
Filing Date: 2015-03-24
Classification: H02K

Abstract:
1. A motor mounted on a vehicle comprising: a housing; a shaft having first and second ends in an axial direction thereof, the first and second ends being rotatably supported by the housing via a bearing; a rotor fixed to the shaft and disposed in the housing, the rotor being capable of rotating about a rotational axis, the rotational axis being parallel to the axial direction of the shaft; a stator that includes: a detector that detects a rotational speed of the rotor, wherein the detector is disposed between the stator coil end and the bearing that supports either first or second end of the shaft, and at least a part of detector is disposed to be overlapped in the radial direction with the stator coil end and the bearing, the detector includes a detector rotor fixed to the shaft; a detector core having circular shape disposed facing an outer circumferential side of the detector rotor in the radial direction; and a detector stator having a detector coil wound around the detector core, and a rotor core of the rotor includes a concave portion to which a part of detector stator is engaged whereby the detector stator overlaps with the rotor core in the radial direction, the rotor core being constituted by a plurality of steel plates being laminated in the axial direction, and a concave portion being disposed at an inner circumference side of one end surface in the axial direction of the rotor core and extending to a circumference direction with a predetermined depth and width so as to form a ring shape.