| 摘要 |
PURPOSE:To bring about sufficient braking force and to shorten the deccelerating time of a motor by deccelerating the rotating speed of the motor with the counter-electromotive force generated at both the driving winding and deccelerating winding exclusively used in decceleration. CONSTITUTION:The servo voltage is supplied to Hall elements 22 and 23 so that the rotation of a motor from a servo circuit 24 can be kept in the determined revs. The outputs of Hall elements 22 and 23 are supplied to the stator coils 12 and 13 through amplifiers 28 and 34. In deccelerating the motor relay switches 32 and 38 are closed and a closed circuit is formed with the stator coils 12 and 13 and the deccelerating coils 14 and 15, to which circuit the current flows by the induced counter-electromotive force of the same phase and the electromagnetic brake is applied to the rotor magnet. |
