交流异步电机矢量控制滑模速度控制器设计

Sliding mode speed controller design for asynchronous motor vector control system

为了提高异步电动机调速系统的动态品质,在传统指数趋近率的基础上提出了一种新型趋近律,该方法能够根据系统状态距离平衡点的远近而自适应调整指数趋近律的收敛速度。为了提高系统的动态性能,将该趋近律算法引入到异步电机的速度控制器的设计中,提出了一种适用异步电机矢量控制系统的滑模速度控制器。与传统PI调节器进行了比较,仿真结果表明,该速度控制器能够有效地提高系统的静态、动态特性与鲁棒性。

To improve dynamic quality of asynchronous motor speed servo system, a novel reaching law method was designed to solve the existing problem in traditional reaching law, which could adaptively adjust according to the state variables＇ distance to the equilibrium position. In order to improve the control performance, the novel reaching law method is employed to speed controller design. Simulation results show that the novel hybrid controller can improve steady, dynamic performances and robustness of speed servo system obviously, compared with traditional PI speed controller.