感应电机全阶磁链观测器矢量控制系统的离散化仿真

Discrete Simulation of Vector Control System for Induction Motor Drives Based on Adaptive Full-Order Flux Observer

基于MATLAB/Simulink仿真平台,采用模块化的思想分别建立了矢量控制模块、全阶磁链观测模块及转速自适应模块,建立了无速度传感器异步电机全阶磁链观测器的离散化仿真模型,可以十分便捷地实现和验证控制算法。与使用S-function搭建的全阶磁链观测器连续域的感应电机模型和控制模型仿真方法相比,给出的模块化离散仿真模型能够大大提高仿真速度。仿真结果表明,离散化采样周期可以合理控制仿真速度和精度,同时也证实了该离散化仿真模型的合理性、有效性,为电机控制系统的快速仿真研究提供了一条思路。

Based on analyzing the mathematical model of an adaptive full-order flux observer for induction mo- tors, the independent functional blocks, such as vector control block, full-order flux observer block and speed-adap- tion block had been modeled according to the modularization idea in MATLAB/Simulink. By the organic combination of these blocks, the model of discrete simulation of an adaptive full-order flux observer for sensorless induction motor drives had been established easily to test and verify control algorithms very conveniently. Compared with the mathe- matical model which was constructed by S-function in MATLAB/Simulink, the simulation speed was improvd. All the simulation results showed that the precision and speed of simulation could by the discrete simulation model proposed can be controlled by the discretization sampling period and the reasonability and validity had also been testified. This method offers a thoughtway for the fast simulation research of motor control system.