鲁棒与电流滞环脉宽调制复合控制同步电机控制中的应用

摘要

A new combined control method was designed for permanent magnet synchronous motors. The control system took advantages of robust control and current hysteresis control. It was aimed to achieve; forcing the PMSM to track time-varying speed and torque trajectories; keeping robustness in the case of load torque uncertainty. The part of robust control designs a nonlinear system based on the damping function. Lyapunov stability and average theory; then, the current hysteresis control was used in the inverter as to obtain a near-sinusoidal AC stator current. The effectiveness of the proposed combined control was shown better than PID method by computer simulations although the operating uncertainty.%在深入研究鲁棒控制和电流滞环控制理论的基础上,设计了一种新型复合控制策略,并将其用于永磁同步电机(PMSM)的运动控制.该控制系统旨在完成同步电机的两大控制目标:一是使电机的速度和转矩分别快速跟踪时变的参考输入；另一目标是在负载转矩不确定情况下使电机具有强的鲁棒性.鲁棒控制部分设计出了基于Lyapunov稳定性、平均值理论及阻尼函数的非线性控制系统；为满足负载转矩的要求,将电流滞环控制方法应用到逆变模块中,以获得近似正弦波形的定子相电流.MATLAB/Simulink仿真表明,无论是在负载恒定还是负载不确定的情况下,该复合控制算法均能取得比传统PID控制优越的控制效果.