永磁同步电机控制策略比较研究

Comparison of Control Strategies for Permanent Magnet Synchronous Motor

针对永磁同步电机,研究了矢量控制(Vector Control,VC)、反推控制(Back Stepping Control,BSC)、直接转矩控制(Direct Torque Control,DTC)以及模型预测控制(Model Predictive Control,MPC)四种控制策略。VC算法简单,但是其整定参数多,不利于工程实现,为了克服VC的缺点,本文基于Lyapunov稳定性理论设计了BSC;DTC结构简单,但是转矩、磁链脉动比较大,本文基于最优原理设计了MPC,与DTC相比,MPC算法简单、具有更好的动态响应特性。永磁同步电机系统四种控制策略的仿真研究表明:BSC具有较好的控制效果,而且能克服VC的缺陷;与DTC相比,MPC具有转矩和磁链脉动小、系统响应快的优点。

For permanent magnet synchronous motor （PMSM）, this paper studies four control strategies including vector control （VC）, back stepping control （BSC）, direct torque control （DTC） and model predictive control （MPC）.VC algorithm is simple, but it has many tuning parameters for project implementation. In order to overcome the shortcomings of VC, this paper designs BSC based on the Lyapunov stability theory. The structure of DTC is simple, but the ripple of torque and flux is relatively large. The paper designs MPC based on the optimal principle. Compared to DTC, the MPC algorithm is simple and its dynamic response characteristic is better. The simulation results of four control strategies in the system of the PMSM show that BSC has a better control effect and overcomes the deficiencies of VC. Compared with DTC, MPC has advantages such as fast system response and small torque and flux ripple.