基于趋近律的牵引电机滑模变结构控制研究  

Sliding Mode Variable Structure Control of Traction Motor Based on Reaching Law

作　　者：刘欢 李东辉 孙燕楠 Liu Huan;Li Donghui;Sun Yannan

机构地区：[1]大连交通大学电气信息学院 [2]大连交通大学动车运用与维护工程学院

出　　处：《变频器世界》2019年第9期84-87,101,共5页The World of Inverters

摘　　要：电力机车牵引电机负荷变化大、调速范围广,对其控制是否准确、快速、平稳直接决定行车安全与否。本文构建了一种基于趋近律的滑模变结构(SMC)矢量控制算法,即设计基于指数趋近律的转矩电流控制器代替传统的转速PI调节器,利用李雅普诺夫函数设计并证明了滑动模态的存在性及控制器的稳定性。最终将该控制算法用于某一牵引电机的调速控制仿真,并与传统的PI矢量控制进行比较,结果表明,所构建的SMC控制算法抑制抖振的同时具有较强的鲁棒性,而且显著降低了电磁转矩的脉动。The electric locomotive traction motor has a large load change and a wide range of speed regulation. The accurate, fast and stable control determines whether the driving is safe. A sliding mode variable structure(SMC) Vector Control Algorithm based on the reaching law is constructed. The torque current controller based on exponential reaching law is designed to replace the traditional PI regulator of speed. Besides the existence of the sliding mode and the stability of the controller are proved and designed by Lyapunov function. Finally, the control algorithm is applied to control the speed of a traction motor. Compared with the traditional PI vector control the result shows that the proposed SMC control algorithm can have strong robustness while suppressing the chattering and reduce the ripple of the electromagnetic Torque significantly.

关 键 词：牵引电机 趋近律 SMC 电磁转矩脉动 鲁棒性 

分 类 号：TM922.71[电气工程—电力电子与电力传动]