| 摘要 |
PURPOSE:To enable to control a rapid deceleration, and a high speed based on a damping convergence by shortcircuiting the paired phases not excited in the decelerating range. CONSTITUTION:Switches SW1, SW2 which shortcircuit the connecting points of transistors of phases I and III, II and IV are provided. If the switch SW2 is closed when only the phases I-III are merely excited in a 1-phase exciting system, a loop I0 flows by counterelectromotive force generated in the windings of the phases II, IV by the movement of a movable element, and the element can be braked. If the switch SW1 is closed when only the phases II-IV are similarly excited, the element is braked. |
