分段供电双三相永磁同步直线电机电流解耦与扰动抑制  

Current Decoupling and Force Disturbance Suppression of Dual Three-Phase Permanent Magnet Linear Synchronous Motors with Section Power Supply

作　　者：郭科宇 李耀华[1,2] 史黎明 Guo Keyu;Li Yaohua;Shi Liming(Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences,Beijing 100190 China;University of Chinese Academy of Sciences,Beijing 100049 China)

机构地区：[1]中国科学院电力电子与电力驱动重点实验室(中国科学院电工研究所),北京100190 [2]中国科学院大学,北京100049

出　　处：《电工技术学报》2022年第24期6332-6344,共13页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划高速磁浮交通系统关键技术研究课题资助项目(2016YFB1200602-20)。

摘　　要：为减少电机输入端电压和驱动变流器容量,长定子永磁同步直线电机常采用定子分段方式供电,但是定子分段永磁同步直线电机会产生定子电感不平衡并导致电流耦合、动子过分段造成反电动势扰动和推力波动等问题。首先,推导了分段供电双三相直线电机电流控制环中电感不平衡导致的电流耦合和反电动势扰动的表达式,设计了一种反馈解耦补偿器对电流进行解耦,采用动态相对增益矩阵(DRGA)对参数失配下的解耦程度进行分析。在此基础上,设计一种二阶滑模扰动观测器,对由过分段导致的反电动势扰动与电机参数失配进行补偿,增强了电流环的抗扰特性,实现了精确的电流跟踪,有效降低了电机的推力波动。实验结果验证了电流解耦与扰动抑制有效性。Section power supply strategy is usually adopted to reduce the voltage and capacity of the inverters in the drive system of the permanent magnet linear synchronous machines(PMLSM)with long primary.However,the sectionally powered armature windings will generate the imbalanced inductance matrix.During the mover entering and leaving progress,the coupling and disturbance of the currents in the linear machine are caused,resulting in fluctuation of current and consequently thrust force ripple.To regulate the current precisely and diminish the thrust force ripple,a feedback decoupling controller is designed,and the effectiveness of the designed feedback decoupling controller is evaluated by using a dynamic relative gain array(DRGA).Furthermore,the disturbance caused by the dynamic process in back-EMF and the mismatches of machine parameters are estimated and compensated by an extended state observer based on the second-order sliding mode.The experimental results show that the proposed current control strategy can effectively reduce the fluctuation in current and diminish the force ripple.

关 键 词：电流控制 扰动 解耦 分段供电 双三相永磁体同步直线电机 

分 类 号：TM359.4[电气工程—电机]