基于UDU^TUKF的无传感器PMSM直接转矩控制

Sensorless direct torque control of PMSM using unsected Kalman filter

针对永磁同步电机(PMSM)直接转矩控制系统(DTC),提出一种不需要计算平方根的Unscented卡尔曼滤波(UKF)算法,即UDUTUKF滤波算法,对定子磁链、转子速度和转子位置进行精确估计并得到电磁转矩估计值,建立了基于UDUTUKF的无传感器PMSM直接转矩闭环控制系统。对比了UDUTUKF和EKF的估计误差,仿真结果表明基于UDUTUKF的无传感器PMSM直接转矩闭环系统具有快速的转速和转矩响应特性。UDUTUKF的估计误差低于EKF的估计误差,且误差收敛速度比较快。

For permanent magnet synchronous motor（new all-digital fuzzy） direct torque control（DTC）,a kind of unscented kalman filter（UKF） algorithm with no need to calculate the square root,namely,UDUTUKF filter algorithm.The rotor speed and rotor position and electromagnetic torque were accurately estimated,and a new sensorless all-digital fuzzy direct torque closed-loop control system was built based on UDUTUKF.In this context,the estimating error of UKF and EKF was compared.The effectiveness of this method was verified through various simulations.The DTC based on UDUTUKFfor PMSM has good speed and torque response pperformance with rapid astringency of estimated error.