| 摘要 |
PURPOSE:To obtain a motor which does not need a sensor and has durability and excellent noise resistance by securing high magnetic permeable units at a constant pitch on the back of coils having current flowing in reverse direction, and opposing to a rotary magnet which generates a magnetic field of the same pitch. CONSTITUTION:Stationary coils 4 having currents 4a, 4b flowing in reverse directions are formed, and a high magnetic permeable unit 5 is disposed corresponding to one 4a of the currents to be secured to a stator 3. On the other hand, a rotary magnet 2 having poles at the same pitch as that of the unit 5 is mounted on a rotary member 1a mounted on a rotational shaft to form a rotor 1, opposed to the coils 4 to form a motor. Thus, since a difference occurs in the generated torques in the currents 4a, 4b, a rotation of the prescribed direction can be obtained even if a commutator, a brush or a sensor instead of it is not used. |
