| 摘要 |
PURPOSE:To enable making the diameter dimension of a motor body smaller by making the major axis of a rotor part smaller and by lengthening the effective length of said rotor part for compensating the decrease of a rotational torque based on the decrease of a diameter. CONSTITUTION:A driving final controlling element is composed of a DC motor 20 and a speed reducer 40. A rotor part 21 is immovably provided at the rotating shaft 22 and a stator part 23 is formed concentrically with said rotor part 21. The rotor part 21 is composed of a revolving core 25 and a winding part 27. The diameter of the rotor part 21 is made small while the length dimension thereof is made longer correspondingly to obtain a specified torque. |
