Patent ID: 7271514
Filing Date: 2007-09-18
Classification: H02K

Abstract:
1. A rotor assembly for an axial gap motor, comprising: a rotor including: a rotary shaft; a rib provided on the rotary shaft; and a disc-form holding member joined to an axial end face of the rib, thereby coupled with the rotary shaft, and provided with permanent magnets arranged in a circumferential direction; and a stator confronting the rotor along a central axis of the rotor; wherein the rib is formed with holes in an opposite axial end face of the rib from the axial end face, each of the holes being arranged to receive a weight to adjust a weight balance of the rotor; and wherein the rib is formed with a coolant passage extending radially outward through the rib; and the rotary shaft is formed with an in-shaft passage extending in the rotary shaft, and a connecting passage connecting the coolant passage with the in-shaft passage liquid-tightly.