| 摘要 |
PURPOSE:To reduce the size and the thickness without decreasing an output torque by containing a drive circuit in a dead space of the vicinity of the central shaft from a stator coil. CONSTITUTION:A circuit board 5 is mounted on a stator yoke 2, and various circuit elements 6, 6 are disposed to rise at the same side as stator coils 3, 3 by utilizing the dead space of the vicinity of the central shaft from the coils 3, 3. A detector 7 of a Hall element for detecting the movement of the pole upon rotation of a rotor magnet rises through a notch 1b formed near the outer periphery of the yoke 2. The current polarity to the coils 3, 3 is switched by the drive circuit on the basis of a detection signal of the detector 7. |
