基于A-W PI~λ永磁同步电动机的速度控制器设计

Design of speed controller based on A-W PI~λ for permanent magnet synchronous motor

在永磁同步电动机控制系统中,用分数阶PI~λ取代整数阶PI速度控制器具有更好的动、静态性能,但在工程应用中,分数阶积分也会引起饱和非线性现象.为解决此问题,本文在分数阶PI~λ基础上提出了变结构A-W PI~λ算法以提高速度控制性能.A-W PI~λ算法根据控制器是否进入饱和而对积分状态进行控制,并采用粒子群智能算法实现控制器的各项参数整定.仿真实验表明:分数阶PI~λ比整数阶PI更容易进入饱和并能提前退出,而A-W PI~λ能迅速退出饱和区,A-W PI~λ速度控制器改进了系统的跟随性、抗负载扰动和鲁棒性能,提高了永磁同步电动机调速系统的速度控制性能.

In the permanent magnet synchronous motor control system, though the fractional order PIλ speed controller has better dynamic and static performance than that of integer PI, it can also cause saturation nonlinear in engineering applications. To solve this problem, an A-W PIx controller with a variable structure was proposed to improve the performance of speed control based on PIx. The A-W PIλ controller controls the integral state according to whether the controller enters saturation. The parameters of the A-W PIλ controller were adjusted by particle swarm optimization algorithm. Simulation results show that fractional order PIλ can easily enter the saturation, and exit earlier than integer PI. The A-W PIλ controller can exit satura- tion more rapidly than fractional PIλ, which improves tracking performance, robustness and load disturbance performance of the permanent magnet synchronous motor system.