Patent ID: 7795774

Claim:
A claw pole type motor including a stator core having an inner diameter side and a rotor arranged at the inner diameter side of the stator core with a circumferential gap being defined between the rotor and the stator core, wherein the rotor extends in an axial direction of the motor, and the motor is controlled by a pulse width modulation system, the motor comprising: first and second claw poles each including a radial yoke portion having an inner diameter side and an outer diameter side, a plurality of pole portions connected to the inner diameter side at connection portions to the radial yoke portion and arranged to extend in the axial direction from the inner diameter side of the radial yoke portion, and an outer peripheral side yoke portion arranged on the outer diameter side of the radial yoke portion, wherein the first claw pole and the second claw pole are formed by compression molding of magnetic powder, wherein the stator core is formed by the pole portions of the first claw pole and the pole portions of the second claw pole being meshed with one another, wherein the first and second claw poles are formed to have the same shape as one another, wherein each of the first and second claw poles has a claw portion, a cross section of which gradually increases in the radial direction and in the peripheral direction toward a root of the claw pole, and wherein an interpole size between the first claw portion and the second claw portion is larger than a gap between the rotor and the claw portions.