Patent ID: 8536756

Claim:
A motor comprising: a stator including a stator iron-core having a winding wound thereon; a rotor including a rotary body confronting the stator and holding a permanent magnet along a circumferential direction, and a shaft joined to the rotary body such that it extends through the rotary body at the center; a bearing supporting the shaft; two conductive brackets fixing the bearing; and a printed circuit board having a drive circuit mounted thereon for driving the winding, wherein the rotary body is provided with an inner iron core to be joined to the shaft, a dielectric layer formed by insulating resin around the inner iron core in a manner to surround the inner iron core continuously along a circumferential direction, and an outer iron core disposed on an outer peripheral side of the dielectric layer, further wherein the two brackets are electrically connected together, and an impedance adjusting member is connected between the stator iron-core and the brackets for adjusting impedance.