永磁同步电机AEKF无磁链直接转矩控制

AEKF No-flux Linkage Direct Torque Control of a Permanent Magnet Synchronous Motor

针对传统直接转矩控制主要为提高转矩响应速度这一特点,研究了星形连接下正弦波永磁同步电机无磁链直接转矩控制。该方法简化了传统的转矩、磁链双闭环控制方式,只针对电磁转矩进行控制,提高了电磁转矩响应速度和精度。考虑到直接转矩控制转矩脉动大这一缺陷,为了进一步降低转矩脉动,节约系统成本,在无磁链直接转矩控制基础上引入自适应扩展卡尔曼滤波无传感器控制,使对系统影响很大的噪声矩阵实时更新,提高了系统收敛性能以及磁链、转速观测性能,有效保证系统鲁棒性,降低电机磁链和转矩脉动的同时节约了成本。仿真和实验证明了理论的正确性与可行性。

Aiming at the main characteristic of traditional direct star connection. This method simplifies the torque and flux torque control, only for electromagnetic torque control, this torque control（DTC） which is improve the torque re- of permanent magnet synchronous motor （ PMSM ） with linkage double closed loop control mode of traditional direct improved the response speed and accuracy of electromagnetic torque. Taking into account the large torque ripple of direct torque control, in order to further deduce the torque and save system cost,lead into the adaptive extended caiman filter（AEKF） based on the no-flux linkage director torque control, there has real time updating of noise matrix which has great influence on the system, this improve the convergence per- formance of system as well as the flux linkage and speed observation performance, effectively guarantee the system robust-ness, reduce the flux and torque ripple of motor and save the cost. The correctness and feasibility of theory are proved by simulation and experiment.