永磁同步电机调速系统的快速幂次趋近律控制

发布时间：2018-09-18 18:02

【摘要】：针对在采用PI控制器的永磁同步电动机(permanent magnet synchronous motor,PMSM)调速系统中,PI控制器无法满足高精度控制要求,且易出现积分饱和的问题,提出一种基于快速幂次趋近律的滑模变结构控制器。该趋近律是在幂次趋近律的基础上,加入指数项以及系统状态变量。其中,指数项具有较快的收敛速度,可以解决幂次趋近律在远离滑模面时趋近速度慢的问题,系统状态变量可抑制由于引入指数项带来的抖振。基于该改进趋近律设计永磁同步电动机滑模速度调节器,并采用李雅普诺夫函数对其进行稳定性分析。经过与PI速度控制器进行仿真实验比较,结果表明采用该控制器的系统可实现速度无超调跟踪,并具有稳定性高、抗负载扰动强的优点。
[Abstract]:A sliding mode variable structure controller based on fast power approach law is proposed to solve the problem that the Pi controller can not meet the requirements of high precision control and is prone to integral saturation in the permanent magnet synchronous motor (permanent magnet synchronous motor,PMSM) speed control system with PI controller. The approach law is based on the power approach law and adds the exponential term and the system state variable. Among them, the exponential term has a faster convergence rate, which can solve the problem of the power law moving slowly away from the sliding mode surface, and the system state variable can suppress the buffeting caused by the introduction of the exponential term. Based on the improved approach law, the sliding mode speed regulator of permanent magnet synchronous motor is designed, and its stability is analyzed by Lyapunov function. Compared with the PI speed controller, the simulation results show that the system with this controller can achieve no overshoot tracking, and has the advantages of high stability and strong anti-load disturbance.
【作者单位】：中国矿业大学电气与动力工程学院;
【基金】：江苏省煤矿电气与自动化工程实验室建设项目(2014KJZX05)
【分类号】：TM341

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