一种模糊PI无差拍DTC系统研究与实现

Research and Realization of a Deadbeat DTC System Based on Fuzzy PI Control

针对传统直接转矩控制(DTC)脉动较大的问题,将无差拍控制运用到DTC系统中。与以往算法不同,该算法在定子磁链定向两相旋转坐标系下,计算出电压控制规律,并通过空间矢量脉宽调制(SVPWM)算法得到控制信号。为提高系统鲁棒性,将模糊PI算法引入到无差拍控制的速度环。实验结果表明,该算法有效地降低了转矩脉动,加快了动态响应,有较强的实用性。

Direct torque control（DTC） usually has torque ripple, the deadbeat control is used into DTC system.Different from normal DTC, this paper calculates the control regulation of voltage in d-q rotating coordinate system with stator flux orientation, and gets the control signal through SVPWM method.Fuzzy PI control is used in speed regulator in order to improve system robustness.Experimental results show that the strategy reduces torque ripple effectively and has fast dynamic response, and some practical value.