| 摘要 |
PURPOSE:To obtain the highly-precise constant tension control by actually measuring the mechanical loss current on every number of revolutions of a DC motor with each sized coil equipped or unequipped on a winder under the control of constant current and field weakening to obtain a function for making the control of mechanical loss compensation. CONSTITUTION:The number of revolutions n of a DC motor 3 is detected by a revolution speed detector, and inputted into the first function generating unit to generate a function (Di/D).Fi(n). The number of revolutions n is inputted into a computation unit together with a rolling material speed V detected by a rolling material speed detecting unit for obtaining a coil diameter D. Then, a coil width B and a specific weight r together with the coil diameter D are inputted into the second function generating unit for calculating 1+lambda.g(B.D.r). Furthermore, by inputting output signals from the first and the second function generating units to a multiplier, Fa(n)=[1+lambda.g(B.D.r)].(Di/D) Fi(n) is calculated for outputting the compensation amount of mechanical loss for making the control of mechanical loss compensation. These controls permits to keep the output of a winder 4 constant for keeping a tension S at a constant level. |
