基于改进滑模控制策略的开关磁阻电机直接瞬时转矩控制方法  

Direct Instantaneous Torque Control Method for Switched Reluctance Motor Based on an Improved Sliding Mode Control Strategy

作　　者：韩国强[1] 陆哲 吴孟霖 于东升[1] Han Guoqiang;Lu Zhe;Wu Menglin;Yu Dongsheng(School of Electrical Engineering China University of Mining and Technology,Xuzhou 221116 China)

机构地区：[1]中国矿业大学电气工程学院,徐州221116

出　　处：《电工技术学报》2022年第22期5740-5755,共16页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52007189);中央高校基本科研业务费专项资金(2020QN65)资助项目。

摘　　要：基于传统滑模控制策略的开关磁阻电机直接瞬时转矩控制方法存在抖振大、动态时间长等问题,且利用机械方程获取参考转矩时需要实时观测系统负载。为解决以上问题,提出了一种基于改进滑模控制策略的直接瞬时转矩控制方法。在传统滑模面和滑模趋近律的基础上引入状态变量,降低了不同工况下电机的转矩波动和电机动态过程调整时间。为有效避免实时计算电机负载转矩,将负载转矩引起的系统变化映射到滑模面的变化,并在滑模控制器中引入负载转矩观测值自适应律,有效抑制了负载变化时的系统抖振并加快了系统动态响应。通过李雅普诺夫函数证明了改进滑模控制器的稳定性。为了验证所提方法的有效性,进行了仿真和实验,结果表明,该方法在稳态和变速变载工况下具有良好的性能。The direct instantaneous torque control strategy of switched reluctance motor based on the traditional sliding mode control method has the problems of large chattering and long dynamic time.Also,the load torque must be observed in real time when the mechanical equation obtains reference torque.In order to solve the above problems,a direct instantaneous torque control strategy based on an improved sliding mode control method is proposed.Based on the traditional sliding mode surface and sliding mode approach rate,the state variable is introduced to reduce the torque fluctuation and dynamic process adjustment time of the motor under different working conditions.In order to effectively avoid the real-time calculation of the load torque,the system change caused by load disturbance is mapped to the evolution of the sliding mode surface.The adaptive law of the observed load disturbance is introduced into the sliding mode controller,and the system chattering is suppressed when the load torque and motor speed change.In addition,the dynamic response of the system is improved.The stability of the improved sliding mode controller is proved by the Lyapunov function.Simulations and experiments are carried out,and the results show that the method has good performance under steady-state,variable speed,and load conditions.

关 键 词：开关磁阻电机 改进滑模控制 直接瞬时转矩控制 自适应律 

分 类 号：TM352[电气工程—电机]