采用新型趋近律和扰动观测器的开关磁阻电机瞬时转矩控制  

Instantaneous Torque Control of Switched Reluctance Motor Based on Novel Reaching Law and Disturbance Observer

作　　者：孙燕文 黄朝志 代礼祥 罗龙 SUN Yanwen;HUANG Chaozhi;DAI Lixiang;LUO Long(School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学电气工程与自动化学院,江西赣州341000

出　　处：《探测与控制学报》2024年第5期113-123,共11页Journal of Detection & Control

基　　金：国家自然科学基金项目(52167005);江西省自然科学基金项目(20232BAB204063);江西省重大科技研发专项“揭榜挂帅”项目(20213AAE02016)。

摘　　要：针对开关磁阻电机传统控制策略易产生转矩脉动大、动态性能差的问题,提出一种基于自适应趋近律和扰动观测器的瞬时转矩控制。为避免转子进入单向导通区间出现转矩过冲现象,在滞环策略中增加了退磁信号;结合线性和终端滑模面提出了非奇异快速终端滑模函数,以实现系统在趋近、滑动阶段均能快速收敛;设计了自适应趋近律和分段切换函数以解决传统趋近律中趋近速度和抖振问题,并且为了降低切换增益,采用滑模扰动观测器将外界扰动及时前馈至控制器。以一台6/20电机进行仿真与实验验证,结果表明:新的滞环策略可以有效降低转矩脉动,且与PI、传统滑模控制相比,改进滑模方法不仅实现了转速无超调、缩短动态响应时间,而且增强了电机的抗干扰性能,输出转矩波动进一步降低。Aiming at the traditional control strategy of switched reluctance motor which is prone to large torque pulsation and poor dynamic performance,an instantaneous torque control based on adaptive convergence law and disturbance observer was proposed.First,a demagnetization signal was added to the hysteresis loop strategy in order to avoid torque overshoot when the rotor enters the unidirectional conduction interval.Second,a non-singular fast terminal sliding mode function was proposed by combining the linear and terminal sliding mode surfaces to realize the fast convergence of the system in both reaching and sliding phases.Subsequently,an adaptive convergence law and a segmented switching function are designed to solve the convergence speed and chattering problems in the traditional reaching law,and in order to reduce the switching gain,a sliding-mode disturbance observer was used to feed forward the external perturbation to the controller in time.Finally,a 6/20 motor was simulated and experimentally verified,and the results showed that the new hysteresis strategy could effectively reduce the torque ripple,and compared with the PI and the traditional sliding mode control,the improved sliding mode method not only realized the speed without overshooting and shortens the dynamic response time,but also strengthens the anti-disturbance performance of the motor,and the output torque ripple was further reduced.

关 键 词：开关磁阻电机 转矩脉动 非奇异快速终端滑模 自适应趋近律 扰动观测器 抖振 

分 类 号：TM352[电气工程—电机]