异步电动机SPWM变频调速仿真研究
异步电动机SPWM变频调速仿真研究(外文翻译,论文11300字)
摘要：本文主要对SPWM异步电动机变频调速系统进行建模与仿真。在各种调速方式中变频调速系统效率最高、性能最好的，因此异步电动机经常采用变频调速技术。电气传动控制系统计算机仿真是应用现代软件工具对其工作特性进行研究的一种分重要的方法。通过仿真试验，可以直观的看到所研究对象的变化情况，优化并确定相关参数。因此进行系统仿真是不可或缺的，这为科学决策提供了可靠的依据。介绍了交流调速系统概况、SPWM的基本概念以及异步电动机变频调速系统在MATLAB/Simulink仿真工具中数学模型的建立以及参数设置。本文通过对交流异步电动机矢量控制调速系统各部分仿真，得出该系统各部分的运行特性，并通过对转矩内环的转速、磁链闭环矢量控制系统的异步电动机矢量控制系统的仿真，直观了解到个研究量的变化情况。
关键词：SPWM；异步电动机；变频调速；仿真；数学模型
Simulation Research on SPWM Frequency Conversion Speed Regulation of Asynchronous Motor
Abstract：In this paper, the SPWM asynchronous motor variable frequency speed control system is modeled and simulated. Among all kinds of speed regulation modes, the frequency conversion speed regulation system has the highest efficiency and the best performance, so the frequency conversion speed regulation technology is often used in asynchronous motors. Computer simulation of electric drive control system is an important method to study its working characteristics by using modern software tools. Through the simulation test, we can intuitively see the changes of the research object, optimize and determine the relevant parameters. Therefore, system simulation is indispensable, which provides a reliable basis for scientific decision-making. The general situation of AC speed regulation system, the basic concept of SPWM and the establishment of mathematical model and parameter setting of asynchronous motor frequency conversion speed regulation system in MATLAB/Simulink simulation tool are introduced. Through the simulation of each part of the vector control speed regulation system of AC asynchronous motor, the running characteristics of each part of the system are obtained. Through the simulation of the vector control system of asynchronous motor with the speed of the inner torque loop and the closed-loop flux control system, the change of the research quantity is intuitively understood.
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Key words：SPWM；Asynchronous Motor；Frequency Conversion Speed Regulation；Simulation; Mathematical Model
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目 录
1 绪论3
1.1 交流调速系统的发展3
1.2 交流调速系统的基本类型4
1.2.1 异步电动机调速系统的基本类型4
1.3 现代交流调速的技术基础4
2 异步电动机SPWM变频调速5
2.1 三相异步电动机的工作原理5
2.2 异步电动机变压变频的基本控制方式5
2.3 异步电动机的数学模型6
2.4 异步电动机的交－交变频矢量调速系统的基本结构7
2.4.1 定子电流控制系统7
2.4.2 转子磁链控制系统8
2.4.2.1 磁链给定环节8
2.4.2.2 磁链调节环节8
2.4.2.3 转速闭环控制系统9
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2.5 正弦波脉宽调制（SPWM）控制技术基本思想9
2.6 SPWM变频调速原理10
2.7 三相SPWM逆变器模型11
2.8 SPWM的同步调制和异步调制11
2.8.1 同步调制12
2.8.2 异步调制12
2.8.3 分段同步调制12
2.9 SPWM波形的生成方法12
2.9.1 自然采样法13
2.9.2 规则采样法13
2.9.3 指定谐波消除法13
3 Simulink仿真基础14
3.1 Simulink简介14
3.2 Simulink启动14
3.3 系统仿真14
3.4 Simulink下的自定义仿真15
4 异步电动机SPWM变频调速仿真系统的设计15
4.1 模型设置及其参数15
4.2 仿真结果16
参考文献18
致谢20
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