| 摘要 |
PURPOSE:To stabilize energization voltage, even when an energizing means changes the response characteristic by aged deterioration and an environmental change or the like, by detecting the actual energization voltage of an electric motor correcting the energization voltage corresponding to input information and setting the reference voltage serving as the target. CONSTITUTION:A mechanism loss compensating part 101 adds mechanical loss compensation in accordance with a strip conveying speed to a reference voltage data set in a control part 11, and an acceleration and deceleration compensating part 121 obtains a difference between the reference voltage data and a drive voltage data Vp1 of motors M11 to Mn1, performing acceleration and deceleration compensation adding a proportional integration value. Next, a monitor part 131 performs proportional integration of a difference between the reference voltage data and the drive voltage data from the acceleration and deceleration compensating part 121, further adding amplitude limitation, a reference voltage data Vref1 is set and applied to an automatic voltage regulator circuit 141 through a converter D/A and an amplifier 131, driving each motor M11 to Mn1. Thus, even when the response characteristic of an energizing means changes by an influence of aged deterioration and an environmental change, tension, applied to a strip in a furnace, can be stably controlled. |
