基于变结构模型参考自适应的双绕组永磁容错电机转子位置估计算法

双绕组永磁容错电机综合考虑了单电机和双余度容错控制系统的优缺点,适用性更强.根据双绕组三相永磁容错电机的基本结构和数学模型,讨论电机在无故障和绕组开路及短路故障情况下不同的容错控制策略.在进行转子位置估计时,将传统的滑模变结构(SMO)控制与模型参考自适应(MRAS)控制相结合,同时采用双正切函数代替符号函数以降低滑模抖动现象,准确地估算出电机在正常和故障情况下的转子位置信息.

Estimation algorithm of rotor position for dual-winding fault tolerant permanent magnet motor drive based on SMO-MRAS

The dual-winding permanent magnet fault-tolerant motor(FTPMM) combines the advantage of the dual redundancy FTPMM and single FTPMM control system, this making the system more reliable less costly and improving the space utilization of the system. On the bases of analyzing the structure and mathematical model of the dual-winding FTPMM, the current vector fault-tolerant control strategy is proposed under healthy and faulty conditions. Combine the sliding mode observer(SMO) with the model reference adaptive system(MRAS), the basic equation of sliding mode surface in SMO-MRAS is constructed according to the differences between the actual current model and the adjustable current model. The SMO replaces the proportional-integral (PI) controller in the traditional MRAS to improve the accuracy and the function of Sigmoid replaces the traditional sign function to reduce chattering.