基于逆系统的车用PMSM滑模矢量控制

Sliding Mode Vector Control of PMSM for Vehicle Based on Inverse System

为满足车用永磁同步电机(PMSM)在快速响应的同时,在负载扰动以及参数变化下具有较强的鲁棒性,提出一种基于逆系统的PMSM滑模矢量控制。对强耦合、非线性的PMSM系统进行可逆性分析,基于逆系统将PMSM解耦成一阶线性转矩子系统和一阶线性定子转矩电流系统,以提高系统响应速度。利用线性连续函数代替传统滑模控制中的符号函数设计滑模控制器,以减小系统抖振、提高系统的鲁棒性与抗扰动能力。分析控制系统的稳定性与控制性能。结果表明:所提出的控制算法与传统PI控制相比响应迅速,在系统参数与负载变化时的鲁棒性显著提高。

In order to meet the requirement of fast response and strong robustness under load disturbance and parameter change of permanent magnet synchronous motor(PMSM)control,a PMSM sliding mode vector control based on inverse system was proposed.The invertibility of strongly coupled and nonlinear PMSM system was analyzed,based on the inverse system,PMSM was decoupled into a first-order linear torque subsystem and a first-order linear stator torque current system to improve the response speed of the system.The linear continuous function was used to replace the symbolic function in the traditional sliding mode control to design the sliding mode controller to reduce the chattering and improve the robustness and anti-disturbance ability of the system.The stability and control performance of the control system were analyzed.The results show that the proposed control algorithm has a fast response compared with the traditional PI control,and its robustness is significantly improved when the system parameters and load change.