感应电机全阶状态观测器及其无源性转速控制

Design of Full-Order State Observer and Its Speed Estimation for Induction Motor Passivity Control

为了实现感应电机的高动态调速性能,针对电机的非线性本质,提出了一种基于全阶状态观测器及其转速自适应估算的感应电机无源性转速控制方案。在基于感应电机无源性与稳定性分析的基础上,设计了渐近稳定转矩跟踪无源性控制器。针对无源控制律所需转子电流难以观测的问题,提出了一种旋转坐标系下以转子电流和转子磁链为状态变量的全阶状态观测器,并应用该观测器对转速进行估算,实现了感应电机无速度传感器的无源性转速控制。仿真结果表明该控制方法易于实现,采用全阶观测器观测转子电流值和估算转速值更为准确,显著提高了感应电机的动静态性能。

In order to realize the high dynamic performance of induction motor,a passive speed control scheme of induction motor based on full-order state observer and speed adaptive estimation was proposed for the non-linear nature of the motor. With the analysis of the passive of induction motor and the relationship between passive and stability,a scheme of asymptotic stability torque tracking controller was designed. In order to solve the problem that the rotor current was difficult to be observed,it was proposed that full-order state observer was designed based on rotating coordinate and the rotor current and rotor flux were as the state variables. The observer was used to estimate the speed,so that the induction motor without speed sensor passive control could be achieved. The simulation results showed that the method was simple and effective,and the rotor current and speed were accurately estimated by the full-order observer and effectively improve the dynamic and static performance of the induction motor.