| 摘要 |
PURPOSE:To eliminate a brush and a slip ring by engaging a rotor of a step motor with a driven shaft, and securing a stator to the supporting frame of the driven shaft, thereby reducing the weight of the rotary unit. CONSTITUTION:A rotor 2 made of a high magnetic permeable material is engaged fixedly with one end of a rotatable driven shaft 1, and toothform poles 3 are formed at an equal interval on the outer periphery of the rotor 2. The shaft 1 is secured concentrically at the supporting frame side with a stator housing 1 made of a nonmagnetic material. Yokes 5 are arranged on the inner surface of a stator housing 4, and permanent magnets 6 are provided at both sides of the yokes 5. A core 7 is provided at opposite side to the yoke 5 side of the permanent magnet 6. The core 7 forms stator side poles 8. |
