| 摘要 |
PROBLEM TO BE SOLVED: To enhance operating efficiency of a device, by setting an appropriate speed change rate from the torque generated in a motor and the allowable torque in each operation state. SOLUTION: Average value for every period or a maximum value of motor currents or motor torque generated in the acceleration or deceleration period, and the constant speed operation period of an induction motor 17 is switched and displayed for a specified time. As this motor torque, a torque command value being obtained by an adjustment action of zeroing the deviation of the speed actual value detected from the motor concerned 17 from a speed command value, which changes according to a predetermined speed change rate is used. The average value for every period or the maximum value of the motor current or the motor torque, generated in the accelerating and decelerating operation period and the constant speed operation period of the above motor 17, is switched and displayed for a specified time, and also the tolerable current or the tolerable torque of the motor concerned is switched and displayed for a specified time. The ratio of the average value for every period or the maximum value of the motor current or the motor torque generated in the accelerating and decelerating operation period and the constant speed operation period of the motor 17 to the tolerable current or the tolerable torque of the motor concerned is obtained and it is switched and displayed for a specified time. |
