主动转速补偿策略的卷取机交流传动直接转矩控制系统

通过对热连轧卷取机系统的电机转速规程进行分析，针对实际生产中由加速度和轧机振动因素导致的卷取张力波动问题，提出一种新型张力控制模型.并且结合负荷观测与主动转速补偿的思想，在未安装转矩和轧辊转速传感器的条件下，首次对于这类有既定速度规程的交流电力拖动系统，设计出一种具有强抗扰能力的直接转矩控制系统.实验结果显示采用主动负荷观测与转速补偿控制方法，能够克服普通直接转矩控制系统的固有缺陷，减小电机转速波动与输出转矩的耦合，实现恒张力卷取的控制目标.

Direct Torque Control System of Coiler Based on Load Observer and Active Speed Compensation

Based on analysis of the principle in setting speed regulation for strip coiler,according to the actual problem that the acceleration and vibration factors of rolling mill induce the fluctuation of coiling tension,a novel tension control model is proposed.Under the condition that without real-time sensors of rolling torque and speed,combining with the idea of load observation and active speed complement,an improved direct torque control(DTC) system,which has strong ability of disturbance rejection,is designed for the first time.The experiment results show that the active speed compensation method can overcome the inherent defect of the common direct torque control system.Signals of speed fluctuation and torque in the asynchronous motor are decoupled.And constant tension in coiling process is achieved.