北京航空航天大学学报 ›› 2018, Vol. 44 ›› Issue (10): 2043-2051.doi: 10.13700/j.bh.1001-5965.2017.0781

• 论文 • 上一篇    下一篇

基于自适应二阶终端滑模的SRM直接转矩控制

刘勇智, 鄯成龙, 林博闻, 宋金龙   

  1. 空军工程大学 航空工程学院, 西安 710038
  • 收稿日期:2017-12-19 修回日期:2018-03-23 出版日期:2018-10-20 发布日期:2018-10-29
  • 通讯作者: 刘勇智,E-mail:kathrynkent@126.com E-mail:kathrynkent@126.com
  • 作者简介:刘勇智,男,博士,教授,博士生导师。主要研究方向:航空电气工程;鄯成龙,男,硕士研究生。主要研究方向:开关磁阻电机直接转矩控制系统。
  • 基金资助:
    国家自然科学基金(61304120)

Direct torque control of switched reluctance motor based on adaptive second-order terminal sliding mode

LIU Yongzhi, SHAN Chenglong, LIN Bowen, SONG Jinlong   

  1. Aeronautics Engineering College, Air Force Engineering University, Xi'an 710038, China
  • Received:2017-12-19 Revised:2018-03-23 Online:2018-10-20 Published:2018-10-29

摘要: 传统的直接转矩控制(DTC)可以在一定程度上减小开关磁阻电机(SRM)的转矩脉动,但是在换相区的转矩脉动抑制效果较差,并且传统的PI控制存在超调量大、鲁棒性差、抗负载扰动能力有限的缺点。因此,设计了基于负载转矩变化率自适应估计的二阶终端滑模转速控制器,在有限时间内使得系统状态迅速收敛到平衡点,实现无需已知扰动上界快速输出给定转矩。此外,对传统的扇区规则进行改进以优化电压矢量的选取,减少由于换相产生的转矩脉动。仿真和实验结果表明:改进后的DTC系统拥有良好的调速控制性能,抗干扰能力强,鲁棒性好,能进一步减少转矩脉动。

关键词: 直接转矩控制(DTC), 开关磁阻电机(SRM), 二阶终端滑模, 扇区细分, 自适应估计, 鲁棒性

Abstract: The torque ripple of switched reluctance motor (SRM) can be reduced to some extent by traditional direct torque control (DTC), but the torque ripple suppression effect is poor in the commutation zone. And the traditional PI control has disadvantages of large overshoot, poor robustness and limited anti-disturbance ability. Therefore, a second-order terminal sliding speed controller based on adaptive estimation of load torque change rate was designed, which made the state of the system quickly converge to the equilibrium point within a finite time. The controller will output the reference torque without the upper bound of the perturbation. In addition, an improved sector segmentation method was used to optimize the voltage vector selection principle in order to reduce the torque ripple which resulted from the commutation. The simulation and experimental results show that the improved DTC system has good speed and control characteristics, strong anti-interference capability and good robustness, which can further reduce the torque ripple.

Key words: direct torque control (DTC), switched reluctance motor (SRM), second-order terminal sliding mode, sector segmentation, adaptive estimation, robustness

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