直接转矩控制异步电动机低速模型研究

Research on Asynchronous Motor Low-Speed Model Based on DTC

为了能观察直接转矩控制下异步电动机低速阶段的控制特性,介绍了一种适用于异步电动机低速运行阶段的控制系统模型。通过Matlab/Simulink依据模型内部数学关系对异步电动机低速直接转矩控制系统进行建模和仿真;同时,介绍了低速模型中异步电动机模块和磁链观测模块的构建方法和过程。仿真结果表明,低速模型具有抑制因电机定子电阻变化而引起定子磁链观测误差的性能。

To observe the low-speed stage control characteristics of asynchronous motor with DTC,a kind of control system model suitable to asynchronous motor low-speed moment stage is introduced.Model and simulation are made by Matlab/Simulink based on the model interior mathematical relationships to the asynchronous motor with DTC.Simultaneously,the building method and process of asynchronous motor module and flux observer module in low-speed model are presented.Simulation results show that the low-speed model can r...