| 摘要 |
PROBLEM TO BE SOLVED: To provide the subject drive control system enabling both speed reducing and raising control to be carried out smoothly without being affected by the difference in motor/inverter constitution, load, voltage drop, and the like, when an instantaneous power failure occurred, and enabling a continuous operation to be carried out without occurrence of any yarn breakage. SOLUTION: This control system, which is equipped with inverters 26-32 driving a plurality of motors 6, 9, 10, 12, 14, 19-22, a converter 25 supplying direct current power to the respective inverters 26-32, and controllers 33, 34 giving speed commands to the respective inverters 26-32, has such a scheme that, when an instantaneous power failure occurs, the inverters 26-32 make a speed-reducing control on the motors connected to the corresponding inverters 26-32, the resulting surplus power is supplied to the motors subject to power shortage, and the fluctuation of direct current voltage is monitored so that the voltage falls within a specified range. |
