异步电动机转子磁场定向控制系统仿真研究设计说明

摘 要本设计通过把异步电动机模型解耦成有磁链和转速分别控制的简单模型，模拟直流电动机的控制模型来达到控制沟通电动机的目的。以电子电流的幅值、相位和频率为控制量，保持电机的旋转磁场大小不变，而改变旋转磁场的旋转速度，达到无延时的转矩响应。在分析三电平逆变器的拓扑结构与工作原理和三相异步电机的数学模型、坐标变换的基础上，深化讨论了转子磁场定向矢量控制系统的基本原理，设计了磁链和转速双闭环系统并给出了框图，通过计算机仿真方法分别建立矩阵变换仿真模型以与基于矩阵变换的异步电动机矢量控制系统仿真模型。对矩阵变换的控制原理、输入、输出性能以与矢量控制系统的优质的抗扰能力与四象限运行特性进行分析验证。针对基于矩阵变换的异步电动机矢量控制系统的特点，着重对矢量控制单元进行了软件设计。直接矢量控制是一种优越的沟通电机控制方式，模拟直流电机的控制方式可以使沟通电机也能达到与直流电机相媲美的控制效果。本文讨论了矢量控制系统中磁链调节器的设计方法。并采纳MATLAB进行仿真设计。关键词：三电平逆变器；异步电机；转子磁场定向控制；MATLAB 仿真 The Simulation Research on Asynchronous Motor Control System Based on Rotor Field-Oriented AbstractThree-level inverter because it can achieve higher voltage grade, output less harmonic content of advantages in high pressure high-power inverter occasions a wide range of applications, and rotor field-oriented control is the most widely used control method. Therefore, this article chooses three-level inverter induction motor rotor field-oriented control for research. Based on the analysis of the three-level inverter topology structure and working principle and mathematical model of three-phase asynchronous motor, on the basis of the coordinate transformation, the in-depth study of the rotor field-oriented vector control system design, the basic principle of the rotor flux observer, flux and speed double closed loop system. Finally, has completed the design of control system and gives the diagram. MATLAB/Simulink on the system mo...