Then according to the mine winding motor operating requirements put forward the piecewise differential control strategy obtained the maximum speed differential for pulling into step and speed stage head table and characteristic curve .

接着按照煤矿 绕 线电机的运行要求，提出了分段级差控制策略，得到了满足电机牵入同步的最大转速级差，并以此为基础得到了理论上的调速级差 表和调速特性曲线。

To establish math model respectively for winding wire rope and steel wire on spool according to production situa-tion and by analysis of the math model and making use of Excel table to fast get the length of entanglement or other param-eters and load of spool .

根据生产情况，对工字轮中的 钢丝绳和钢丝分别建立数学模型，通过对数学模型的分析，利用Excel 表格，快速获得卷装物的长度或工字轮的参数和容重。