| 摘要 |
PURPOSE:To reduce a noise and to raise the efficiency by integrally composing a stationary armature, an armature coil and a position detector by an injection molding, and integrally composing a circular magnet rotor, a fan and a rotational shaft. CONSTITUTION:Bases of fans 3a, 3b,... are secured to the outer periphery of a cup-shaped member 1a, and a rotor 2 is secured to the outer ends thereof. A rotor 2 is circular, made of plastic material, and an annular magnet rotor is buried therein. The member 1a, fans 3a, 3b,... and a cylinder 1c are integrally composed by plastic molding. An armature coil and a position detector are buried annular shape 4 formed by injection molding of the plastic. The armature coil is controlled to be energized by the output of the position detector. |
