Patent ID: 7806225

Claim:
A steering system motor arranged in a steering system that changes a direction in which a wheel is pointed according to an operation of an operating member, the motor comprising: a stator in which a plurality of magnetic pole bodies, each of which has a coil that generates magnetism when power is supplied, are arranged in a circle; a rotor positioned such that an outer peripheral surface of the rotor opposes an inner peripheral surface of the stator or positioned such that an inner peripheral surface of the rotor opposes an outer peripheral surface of the stator; and a power supply device that supplies three-phase power to the plurality of magnetic pole bodies of the stator, wherein the plurality of magnetic pole bodies is divided into a plurality of magnetic pole body groups, each of the plurality of magnetic pole body groups is divided into a first group and a second group, each of the first group and the second group includes a same number of magnetic pole bodies, the number being a multiple of three, the magnetic pole bodies belonging to the first group are arranged adjacent to each other in a circumferential direction of the stator, the magnetic pole bodies belonging to the second group are arranged opposing the magnetic pole bodies belonging to the first group in a diameter direction of the stator so that a row including half of the magnetic pole bodies belonging to each of the magnetic pole body groups is adjacent to a row including half of the magnetic pole bodies belonging to the other magnetic pole body group in the circumferential direction, the power supply device includes a plurality of power supply portions each of which supplies power to a corresponding one of the magnetic pole body groups, a number of the power supply portions corresponding with a number of the magnetic pole body groups, the power supply portions being independent of each other, and the power supply portions supply same phase power to the magnetic pole bodies that oppose each other in the diameter direction to generate magnetism that acts on the rotor in mutually reverse directions in the diameter direction.