带有母线电压控制的异步电机矢量控制策略研究
毕业论文关键词 ：母线电压控制；矢量控制；异步电机；前馈环节
DC Bus Voltage Control Strategy Based on Asynchronous Motor Vector Control
Abstract: Aiming at the practical problems encountered in the production, put forward a kind of asynchronous motor vector model control strategy, the DC bus voltage as control object be introduced into the control system, large fluctuations occur to suppress the trolley locomotive bus voltage, reduce system due to voltage fluctuations trigger under voltage and overvoltage protection interrupt operation phenomenon, improve the reliability of the system. In the traditional asynchronous machine vector control strategy based on feed forward link, proportion, construction of system using MATLAB, And validated by simulation. Used the result get from the traditional control method and the proposed control method, Results show that the control method to ensure the high performance of the original control system, can also realize the stable control of DC bus voltage. System can reduce the under voltage and overvoltage protection caused by tripping phenomenon.
Key Word : DC bus voltage control、vector control、asynchronous motor 、feed forward component
目 录
1.绪论 1
1.1 引言 1
1.2 异步电机调速与带母线电压控制技术概况 1
1.2.1 交流异步电机调速技术发展 1
1.2.2 传统的异步电机母线电压控制策略 2
1.3 系统仿真技术概述 2
1.4仿真软件的发展状况与应用 3
1.5 MATLAB 概述 3
1.6 Simulink 概述 3
2.矢量控制理论 4
2.1 传统的矢量控制方法 4
2.2传统控制方法的MATLAB仿真模型搭建 5
2.2.1坐标变换 5
(1) 三相—两相变换 6
(2) 静止两相—旋转正交变换模块 8
(3) 静止两相—旋转正交变换 9
2.2.2 磁链定向模块： 10
2.2.3:PI调节器仿真模型 11
2.2.4 空间电压矢量SVPWM 原理: 11
2.2.5:SVPWM的仿真模型 16
2.3 传统的矢量控制方法MATLAB仿真 21
2.3.1电动机正向运转时转速和三相电流波形 22
2.3.2正向运转时母线电压突然失电时 22
2.3.3电机突然处于制动状态时 23
3.具有母线电压控制的异步电机矢量控制 24
3.1具有母线电压控制功能的矢量控制方法 24
3.2母线电压前馈控制环节的设计： 24
3.2.1 过电压控制 25
3.2.2 暂时失电控制 25
3.2.3控制环节参数计算 27
3.3 仿真实验 27
3.3.1越过暂时失电控制 28