【作者】 谭畅； 李煜刚； 杨辉； 李中奇； 付雅婷；

【Author】 Chang Tan;Yugang Li;Hui Yang;Zhongqi Li;Yating Fu;School of Electrical and Automation Engineering, East China Jiaotong University;Jiangxi Key Laboratory of Advanced Control and Optimization;

【机构】 华东交通大学电气与自动化工程学院； 江西省先进控制与优化重点实验室；

【摘要】 针对在复杂工况下高速动车组永磁同步牵引电机传统矢量控制策略控制鲁棒性能较差、抗干扰能力弱等问题,本文提出了基于改进滑模观测器的永磁同步牵引电机无传感器矢量控制策略。首先,分别建立永磁同步牵引电机在两相静止和旋转坐标系下的数学模型;其次,结合等效反馈和超螺旋滑模控制的思想,设计了一种新型超螺旋滑模观测器,提高了滑模观测器的观测精度,降低了系统抖振;然后,采用一种新型滑模指数趋近律,设计了自适应非奇异终端滑模转速控制算法,同时设计了一种滑模扰动观测器估计未知扰动并对转速控制器进行前馈补偿;最后,在Matlab/Simulink中搭建高速动车组永磁同步牵引电机控制系统仿真模型,进行仿真验证。仿真结果表明,本文所设计方法与基于传统滑模观测器与PI转速控制器的无传感器矢量控制相比,能够有效提高观测精度,并且提升控制系统的鲁棒性与抗干扰能力。更多还原

【Abstract】 In order to solve the problems of poor robustness and weak anti-interference ability of traditional vector control strategy of PMSM in high speed EMU, a sensorless vector control strategy based on improved sliding mode observer is proposed in this paper. Firstly, the mathematical models of permanent magnet synchronous traction motor in two phase stationary and rotating coordinate systems are established respectively. Secondly, combining the idea of equivalent feedback and super-spiral sliding mode control, a new super-spiral sliding mode observer is designed, which improves the observation accuracy of the sliding mode observer and reduces the system buffeting. Then, a new sliding mode exponential reaching law is used to design an adaptive non-singular terminal sliding mode speed control algorithm, and a sliding mode disturbance observer is designed to estimate the unknown disturbance and feedforward compensation the speed controller. Finally, the control system simulation model of permanent magnet synchronous traction motor of high-speed EMU was built in Matlab/Simulink for simulation verification. The simulation results show that compared with the sensorless vector control based on the traditional sliding mode observer and PI speed controller, the proposed method can effectively improve the observation accuracy, robustness and antiinterference ability of the control system.更多还原