| 摘要 |
PURPOSE:To shorten the damping time by temporarily interrupting the excitation of a stable phase when a moving element reaches the vicinity of the stable point and shortcircuiting the winding except the stable phase. CONSTITUTION:SW1, SW2 are contacts for shortcircuiting the both ends of a winding when a motor becomes stopped state. When shifted from phase I to phase III, the SW2 is closed to shortcircuit at the time considered that a moving element reaches the stable point of the phase III. In this manner, a counterelectromotive force is generated in the winding of the phases II, IV when vibration occurs at the motor stopping time, loop currents I 0 of the phases II, IVare flowed to attenuate the vibration. |
