| 摘要 |
PURPOSE:To contrive to form a cylinder motor in a compact type, and to eliminate magnetic noise and cogging torque to be generated from the position detecting part by a method wherein the motor is made to have constitution having the built-in position detecting part for a video head inside of the radius of the electromagnetic part of motor. CONSTITUTION:Magnetic field detecting elements 4 formed by using three Hall elements, etc., for detection of the rotating position of a rotor magnet 1 are provided being inserted respectively in small holes in the surface of a flat ring- plate-type stator yoke 3. A flexible wiring substrate 30 is used as the wiring substrate, and a shielding case 10 is made to have constitution eliminated notch at the side part. The flexible wiring substrate 30 is fixed to the back side of the stator yoke 3, a stator coil 2 is fixed on the surface side of the stator yoke 3, and is made to face with the magnetic pole face of the rotor magnet 1. |
