| 摘要 |
PURPOSE:To extend the lifetime of a brush and to prevent a noise due to a spark generated at commutation time from generating by composing the brush to remain in contact with a slip ring. CONSTITUTION:A DC rotary motor has a cylindrical permanent magnet 3 in which the outer periphery has N-poles and the inner periphery has S-poles, a rotor 4 has conductor group 6 parallel to a shaft 5 on the periphery, and both ends are all electrically connected with upper and lower slip rings 7, respectively. When the rings 7 are so energized through the brushes 8 from the terminals 1, 2 so that one is positive and the other is negative, the direction of the current is unidirectional for any conductor 6, and the direction of a magnetic field is unidirectional. Accordingly, a rotary torque of one direction is merely generated at the rotor 4 to form a DC rotary motor. |
