大型太阳能硅片多线切割机的张力控制

TENSION CONTROL OF THE LARGE-SCALE SOLAR WAFER MULTI-WIRE SAW

分析中小型多线切割机的不足,用垂直的张力摆杆替代中型多线切割机的水平张力摆杆,减少张力摆杆自身重力对张力波动的影响,实现张力值的精确设定。综合考虑大型多线切割机的结构特点和控制器的运算特点,提出具有初始状态的闭环迭代学习张力控制算法。该算法较好地解决了系统中存在的收放线轮半径变化和排线器出线位置不同等非线性时变问题。试验表明,该算法张力摆杆波动幅度小,优于传统PID控制。试验样机的张力控制性能指标总体达到国外大型太阳能多线切割机,学习时间指标优于国外同类机型。

The large-scale solar wafer multi-wire saw is restricting our PV industry development in the region. The shortcomings of the small and medium-sized multi-wire saw are analyzed. That horizontal tension swinging rod of middle-sized multi-wire saw is replaced by the Vertical one can reduce tension fluctuation by tension swinging rod of its own gravity, and realize the precise tension value set. Comprehensive consideration of the large solar wafer multi-wire saw structure features and the operation characteristics of controller, the closed-loop iterative learning tension control algorithm with some initial state is put forward. The algorithm is a good way to solve the nonlinear time-varying problem of existing in the system of pay-off wire wheel radius change and of line box seat varying. The contrast experiment show that this algorithm is swinging tension rod range small and the algorithm is superior to the traditional PID control. The overall performance index of experimental prototype tension control come up to foreign large-scale solar wafer multi-wire saw and learning time index is superior to the foreign similar type.