JPS6415220A - Tension control device for utilizing maximum torque and maximum electric current of winding motor - Google Patents

Abstract

PURPOSE:To apply a motor having a smaller speed range than a coil diameter ratio from staring winding a material to max. coil diameter at finishing the winding by controlling by a limiter capable of recognizing a reference tension electric current from the outside. CONSTITUTION:The load current at starting the winding is obtained by a motor current 21, the max. coil diameter D at winding is known by the width of the material 24, weight of the winding material 25 and specific gravity of the material 26. A material length L is known by the material thickness 23 and D. Then, a winding time from starting the winding to the max. diameter is known by a initial winding speed 27 and an accelerating rate 28. Further, an inertia compensating torque and electric current required in accelerating decelerating stages are calculated. Based on these data, the electric current RMS required from starting winding to max. coil diameter at finishing winding is estimated through an estimating computing element 29. When the sum of the RMS computing element 22 and RMS estimating computing element 29 is >=1, the tension current limiter deciding computing element 30, acquires the max. value of the tension current to make <=1, and outputs it as a limiter value 31. The limiter 33 is inputted the reference tension current 14 and the larger value from an automatic setter 31 or a manual setter 32 is outputted to the reference current setter 11.