Patent ID: 8689916

Claim:
An apparatus of driving wheels for an in-wheel system, comprising: a driving shaft which is a center of rotatable driving; a fixation supporter rotatably supporting the driving shaft and coupled to the driving shaft; an in-wheel motor coupled to an inside of a wheel having a tire mounted on the driving shaft and generating rotational power; and a balancing member formed on the driving shaft at a position corresponding to the wheel coupled with the in-wheel motor, wherein the in-wheel motor having a double rotor structure comprises an out-rotor having a plurality of out-rotor salient poles formed at equidistance along an inner circular peripheral surface, an in-rotor received in the out-rotor and having a plurality of in-rotor salient poles formed at equidistance along an outer circular peripheral surface, a stator core formed between the in-rotor and the out-rotor so as to face each of the in-rotor and the out-rotor, and provided with a plurality of out-stator salient poles each corresponding to the out-rotor salient poles and including a main salient pole, a first auxiliary salient pole, and a second auxiliary salient pole sequentially formed along an outer peripheral surface, and a plurality of in-stator salient poles corresponding to the in-rotor salient poles and including a first salient pole and a second salient pole sequentially formed along an inner peripheral surface, wherein coils are wound around the main salient pole and, the first salient pole and the second salient pole, respectively.