Simulink单逆变器双电机传动系统的仿真研究
从20世纪30年代开始，人们就致力于交流调速技术的研究，交流传动系统通常采用一台变频器驱动一台电机，但在有些场合，受空间和其他条件的限制，通常采用一台变频器驱动多台电机。
本文就采用单逆变器双电机系统，利用三相异步电机数学模型、旋转两相正交模型、静止两相正交模型和按转子磁链定向的矢量控制，用MATLAB的Simulink进行仿真，并对仿真结果进行一个分析：当两台电机参数一致时仿真的结果如何，调速的效果如何；而当两台电机参数不一致时对电机的电流、转矩、转速的影响。9686
关键词： 矢量控制；SVPWM；变频调速；双电机拖动；仿真
Simulation of single inverter dual motor control system
Abstract: With the continuous development of production technology, the weak link of DC electric drive gradually displayed. The existence of the commutator makes DC frequency conversion speed regulation motor maintenance workload increased and limited by the capacity, speed and the use of the environment.
Starting from the nineteen thirties, scholars are working on the study of the technology of AC speed regulation, it usually use one converter to control one motor, but on some occasions limited by the space and other conditions, we usually use one converter to control more motors.
This article is talking about using one converter to control two motors, we use the mathematical model of Three-phase asynchronous motor; rotary two-phase orthogonal coordinate system; static two-phase orthogonal coordinate system and the vector control of oriented by the rotor flux, and on the basis of this, we use MATLAB to simulate the whole system. In the end, we will analysis the result of the simulation, what’s the result when these two AC motors’ parameters are the same, and what’s the effect. And we will discuss the effect on the motors’ current; torque and speed when control two different parameters of AC motors.
Key word: rotor flux orientation; SVPWM; energy-saving speed regulation; simulation
目录
1. 绪论 1
1.1 交流调速系统的背景及发展 1
1.2 本课题的意义 3
1.3 本课题的主要内容 3
2. 异步电动机动态模型 4
2.1 异步电动机的三相数学模型 4
2.2 三相-两相坐标系变换 7
2.3 静止两相-旋转正交变换 11
2.5 按转子磁链定向的同步旋转正交坐标系状态方程 14
2.6 按转子磁链定向矢量控制调速 15
3. 系统搭建 17
3.1 MATLAB简介 17
3.2 本设计搭建的坐标变换模型 17
3.3 本设计搭建的转子磁链定向矢量控制模型 20
3.4 本设计搭建的SVPWM模型 20
3.5 本设计搭建的总仿真图 26
4. 单逆变器双电机传动系统的仿真 27
4.1 电机参数一致时的仿真结果 27
4.2 电机参数不一致时的仿真结果 28
5. 结论及展望 37
致谢 38