摘要:双馈电机是结合异步电机和同步电机的优点而发展起来的一种新型电机。它不仅可以满足一般场合机械调速的需要,而且能通过调节转子电压幅值和相位来实现电机定子侧功率因数的调节。
本文从双馈异步电机的基本工作原理出发,分析双馈异步电机调速的特点,引入矢量控制技术,进行坐标变换,得出双馈异步电机同步坐标系上的数学模型。根据定子磁链定向控制策略,用简化的电压模型法构建了磁链观测器并构建了控制系统。根据系统运行和控制对象的特点,在Matlab/Simulink环境下进行了仿真研究,建立了完整的双馈异步电机矢量调速系统仿真模型,模拟了系统在不同工况下的运行,仿真结果表明控制系统具有良好的动、静态特性,响应速度快。52044
毕业论文关键词:双馈异步电机,定子磁链定向,矢量控制,仿真模型
Abstract:Doubly-fed combines the advantages of induction motors and synchronous motors and developed a new type of motor. Not only does it meet the needs of the general situation mechanical governor, and by adjusting the amplitude and phase of the rotor voltage to achieve the stator side power factor adjustment.
In this paper, starting from the basic working principle of doubly-fed induction motor, the analysis of the characteristics of doubly-fed induction motor speed control, the introduction of vector control technology, coordinate transformation, draw a doubly-fed induction motor mathematical model of synchronous coordinate system. Based on stator flux oriented control strategy, using a simplified method to build the voltage model flux observer and control system is constructed. According to the characteristics of the system operation and control object, under the environment of Matlab/Simulink simulation research, the establishment of a complete doubly-fed induction motor vector control system simulation model, the operation of the system under different conditions was simulated, the simulation results show that the control system has good dynamic and static characteristic, fast response speed.
Key words: Double-fed Machine, stator flux oriented, vector control, simulation model
目 录
1 绪论 4
1.1课题研究的意义 4
1.2双馈电机技术的发展状况 4
1.3本文研究的主要内容 4
2 双馈调速的基本原理 5
2.1绕线式双馈电机的结构 5
2.2双馈异步电机的基本方程式 6
2.3双馈调速的基本原理 8
3 矢量控制技术及双馈电机的数学模型 9
3.1矢量变换规律 9
3.1.1从三相到两相的静止坐标变换(3S/2S) 9
3.1.2从两相静止到两相旋转的坐标变换(2S/2R) 10
3.1.3从三相静止到两相旋转的坐标变换(3S/2R) 11
3.1.4直角坐标到极坐标的坐标变换(K/P) 11
3.2双馈异步电机在两相坐标系上的数学模型 12
3.2.1双馈异步电机在两相任意旋转坐标系上(D-Q坐标系)的数学模型 12
3.2.2双馈异步电机在两相同步旋转坐标系上的数学模型 14
3.3双馈异步电机矢量控制的基本原理 14