摘要：因为异步电动机的物理模型是一个高阶、非线性、强耦合的多变量系统，需要用一组非线性方程组来描述，所以控制起来极为不便。异步电机的物理模型之所以复杂，关键在于各个磁通间的耦合。如果把异步电动机模型解耦成有磁链和转矩分别控制的简单模型，就可以模拟直流电动机的控制模型来控制交流电动机。24245
矢量控制就是一种优越的交流电机控制方式，它模拟直流电机的控制方式使得交流电机也能取得与直流电机相媲美的控制效果。
而SVPWM是近年发展的一种比较新颖的控制方法，是由三相功率逆变器的751个功率开关元件组成的特定开关模式产生的脉宽调制波，能够使输出电流波形尽 可能接近于理想的正弦波形。空间电压矢量PWM与传统的正弦PWM不同，它是从三相输出电压的整体效果出发，着眼于如何使电机获得理想圆形磁链轨迹。 SVPWM技术与SPWM相比较，绕组电流波形的谐波成分小，使得电机转矩脉动降低，旋转磁场更逼近圆形，而且使直流母线电压的利用率有了很大提高，且更易于实现数字化。
本文研究了矢量控制系统中磁链开环的设计方法。并用MATLAB最终得到了仿真结果。
毕业论文关键词：矢量控制，SVPWM，MATLAB仿真
Route traction motor vehicle research and simulation of multi-motor drive control strategy
Abstract：Because asynchronous motor's physical model is a higher order, the misalignment, the close coupling many-variable system, needs to use a group of nonlinear simultaneous equation to describe, therefore controls extremely inconveniently. The reason that asynchronous machine's physical model is complex, the key lies during each magnetic flux the coupling. If becomes the asynchronous motor model decoupling has the simple model which the flux linkage and the rotational speed control separately, may simulate direct current motor's control model to control the motor.
The vector control is one superior alternating current machine control mode, it simulates direct current machine's control mode to enable the alternating current machine also to obtain the control effect which compares favorably with the direct current machine.
SVPWM is a relatively recent development of a novel control method, the switch-mode pulse width modulated wave of a specific three-phase power inverter composed of six power switching elements generated, the output current can be as close to the ideal waveform sine wave. Space Vector PWM with traditional sinusoidal PWM different, it is from the overall effect of the three-phase output voltage, focusing on how to make the motor flux to obtain the desired circular trajectory. SVPWM and SPWM technology compared to small harmonic components winding current waveform, causing the motor to reduce torque ripple, even approaching a circular rotating magnetic field, but also the utilization of the DC bus voltage has been greatly improved, and easier to achieve digitization.
This article has studied in the vector control system the flux linkage regulator's design method. And obtained the simulation result finally with MATLAB.
KEY WORDS: Vector Control, SVPWM, MATLAB simulation
目录
干线牵引电机车多电机驱动控制策略的研究与仿真 - 1 -
1.1 引言 - 5 -
1.2 课题设计概述 - 5 -
1.3 课题设计方案选择 - 6 -
1.4 牵引电机发展前景 - 6 -
2 基本原理及概述 - 9 -
2.1 异步电机的三相数学模型 - 9 -
2.1.1 磁链方程 - 10 -
2.1.2 电压方程 - 10 -
2.1.3 转矩方程 - 11 -
2.1.4 运动方程 - 12 -
2.2 矢量控制基本原理 - 12 - 干线牵引电机车多电机驱动控制策略的研究与仿真:http://www.751com.cn/zidonghua/lunwen_17667.html