| 摘要 |
PURPOSE:To stop the revolution of a servo motor instantaneously when abnormality is detected by generating the stop command signal of the servo motor in a servo motor drive regardless of a speed command signal to the drive when the drive detects abnormality and the servo motor is stopped. CONSTITUTION:When an abnormal signal 6 is input to an abnormal signal detector 5, the detector 5 controls a relay circuit 13, and a speed command to a speed-error amplifier circuit 11 is transmitted over the OV side. Consequently, the same as a state, in which a stop command is input to the amplifier circuit 11, is brought. Since a motor 1 is rotated at certain speed yet at that time, the amplifier circuit 11 outputs the maximum value of a deceleration command. As a result, maximum brake torque capable of being generated by the motor 1 and a driver 3 is generated, thus quickly stopping the motor 1 as much as possible. Accordingly, the overrun of the motor can be inhibited. |
