基于滑动模控制的感应电动机增益自适应锁相环速度控制

Sliding-Mode Controlled Induction Motor Drive Using Gain-Adaptive Phase-Locked Loop Speed Control

提出一种高性能感应电动机速度控制方案。首先采用滑动模控制理论对感应电机的转矩进行强鲁棒性控制，在此基础上设计了双模速度控制器，用锁相技术获得高稳态精度，并通过环路增益自适应方法提高锁相环系统的抗干扰能力。综合采用上述方法，可使系统获得优良的动态和稳态性能，并对电机参数和外部干扰具有强鲁棒性。仿真结果证明了控制方案的有效性。

This paper presents an excellent speed control scheme for induction motor drives. First, sliding mode control is employed to provide quick torque characteristics with robustness to motor parameter variations. Then, excellent steady -- state speed regulation and fast transient response are obtained by dual- mode speed controller including phase -- locked loop (PLL) technique and conventional closed -- loop control. In addition, a loop -- gain adaptation scheme is developed using MRAS theory to suppress the torque disturbance effect on motor speed. The proposed system combines the precise speed regulation of PLL technique and the robustness of sliding mode control, with the insensitivity of disturbance by loop -- gain adaptation. Simulation results verified the validity of the proposed system.