| 摘要 |
PURPOSE:To contrive reduction in stopping time of a DC motor when an emergency stop is performed and reduction in irregularity of the stopping time. CONSTITUTION:When an emergency stop signal EST is inputted to a power supply cutoff controlling device 6, an electromagnetic switch X is cut off and its contact point XK is turned to OFF, and the supply of power source to a revolution number controlling device 1 is cut off. At that time, if the DC motor 3 is at a standstill, an electromagnetic switch Z is cut off due to application of a stop signal ST on a power source cutoff controlling device 6, and the supply of power source to a driving device 2 is cut off. However, the stop signal ST is not outputted while the DC motor 3 is in operation, a revolution command signal RS is zeroed due to cut off of power source of the revolution number controlling device 1, stop control of the DC motor 3 is started following the revolution number command RI< and when the DC motor comes to a complete stop, a stop signal ST is outputted and performs the same movements as above-mentioned. |
