电工技术学报  2022, Vol. 37 Issue (24): 6332-6344    DOI: 10.19595/j.cnki.1000-6753.tces.211533
电机及其系统 |
分段供电双三相永磁同步直线电机电流解耦与扰动抑制
郭科宇1,2, 李耀华1,2, 史黎明1,2
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
Current Decoupling and Force Disturbance Suppression of Dual Three-Phase Permanent Magnet Linear Synchronous Motors with Section Power Supply
Guo Keyu1,2, Li Yaohua1,2, Shi Liming1,2
1. Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China;
2. University of Chinese Academy of Sciences Beijing 100049 China
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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。
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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    
Abstract: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.
Key wordsCurrent control    disturbance    decoupling    section power supply    dual three-phase permanent magnet synchronous machine   
收稿日期: 2021-09-27     
PACS: TM359.4  
基金资助: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)
通讯作者: 史黎明 男,1964年生,研究员,研究方向为直线电机设计及其控制、无线电能传输技术。E-mail: limings@mail.iee.ac.cn   
作者简介: 郭科宇 男,1993年生,博士研究生,研究方向为永磁直线同步电机设计及控制。E-mail: guoky93@mail.iee.ac.cn
引用本文:   
郭科宇, 李耀华, 史黎明. 分段供电双三相永磁同步直线电机电流解耦与扰动抑制[J]. 电工技术学报, 2022, 37(24): 6332-6344. Guo Keyu, Li Yaohua, Shi Liming. Current Decoupling and Force Disturbance Suppression of Dual Three-Phase Permanent Magnet Linear Synchronous Motors with Section Power Supply. Transactions of China Electrotechnical Society, 2022, 37(24): 6332-6344.
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