滑模变结构技术在无刷直流电机中的应用

Application of sliding mode variable structure technology in magnet brushless DC motor

针对永磁无刷直流电机(BLDCM)中采用的输入输出线性化控制方法,对电机参数变化及外加干扰时鲁棒差问题,研究了一种简单的BLDCM滑模变结构控制方法。借助于微分几何理论,将一个具有理想动态性能的线性参考模型引入BLDCM滑模变结构控制器设计之中,设计了基于模型参考滑模变结构的BLDCM控制器。该方法可以使BLDCM具有理想动态特性,在实现对电机状态的精确跟踪的同时,也对电机参数变化和外部干扰具有较强的鲁棒性,最后实验验证理论的正确性。

For the robustness is poor for permanent magnet brushless DC motor(BLDCM)using input and output linearization control method to motor parameters variations and external disturbances,the paper studies a simple method of sliding mode variable structure control for BLDCM.By using differential geometry theory,the paper introduces a linear reference model with an ideal dynamic performance into the design of sliding mode variable structure controller,and designs the controller based on model reference of variable structure sliding mode.The method can make the ideal dynamic characteristics,and can achieve accurate tracking the state of motor,at the same time the system has stronger robustness for motor parameter variations and external disturbances.Finally the simulation results prove the validity of the theory.