变频电机试验计算机采集与处理系统的设计

文档编号:ZD390  文档字数:20718,页数:43，
【摘要】由于电机技术的不断发展,变频电机的使用越来越广泛，所以对变频电机的数据采集具有十分重要的意义.
 这次我们的重点是对输入变频电机的电压、电流波形进行采集与处理,在传感器部分我们采用了国内较为先进的LEM电压电流传感器,在数据采集部分由于波形发生了畸变,我们选择了HY-8131高速数据采集卡。该系统通过软硬件的模块化结构，解决了瞬态变频测试的一系列问题，本文还分析了系统的干扰误差，阐述了为确保系统测试精度所采取的措施。
 除此之外，我们还介绍了变频电机的基本特性，交交变频器和交交变频电路的基本情况和霍尔传感器的基本原理。最后还介绍了变频器的抗干扰问题。
【关键词】交-交变频电机  传感器  数据采集系统  变频器 
 
  
 Designing On the Computer colleting And Processing System for cycloconverter-fed synchronism Motor
[Abstract] With the development of electrical machinery, technology of cycloconverter is used winder and winder. So studying the system of auto-collecting for cycloconverter-fed synchronism motor has an important meaning.
 The focal point of this paper is the data colleting of the output voltage and current of the cycloconverter-fed synchronism motor, we used the LEM current-sensor of Beijing LEM Company. In order to solve the problems of distortion in wave form, we used the data colleting board HY-8021. This system solves a series of problems like measuring and testing of moment frequent conversion through module structure of its hardware and software. The paper also analyzes the appropriate eliminating measure.
 Besides, we also introduced the characteristics of the cycloconverter-fed synchronism motor, the situation of the cycloconverter and the circuit and also the principle of the current-sensor, the paper introduced the problem of resist interference in the end.
[Keywords] cycloconverter-fed synchronism motor  sensor  data colleting  convetor

目    录
摘   要 ............................................................Ⅰ
Abstract...........................................................Ⅱ
第1章 概述.......................................................... 1
 1.1变频电机测试技术的现状............................................1
 1.2变频电机的简介.................................................. 2
 1.2.1变频电机的简介...............................................2
 1.2.2变频电机测试的介绍...........................................2
 1.2.3变频电机试验方法介绍.........................................4
 1.3  系统总体方案设计..............................................5
第2章 变频器、传感器、采集卡的介绍.................................... 6
 2.1变频器..........................................................6
 2.1.1变频器的简介.................................................6
 2.1.2 交交变频器的结构............................................ 7
 2.1.3三相交交变频电路的输入输出特性...............................8
 2.2 传感器........................................................ 9
 2.2.1传感器的定义.................................................9
 2.2.2传感器的组成.................................................9
 2.2.3电流传感器的主要计算公式................................... 10
 2.2.4传感器技术的现状和发展动向..................................10
 2.2.5霍尔传感器..................................................10
 2.3 采集卡 .......................................................... 13
第3章 电压电流信号的采集与处理.......................................... 14
 3.1非正弦信号的采集..................................................14
 3.1.1信号的采集..................................................14
 3.1.2电压、电流取样..............................................15
 3.1.3采样速率和采样频率..........................................18
 3.2电压、电流信号的采集处理..........................................19
 3.2.1电参数的定义................................................19
 3.2.2电压、电流信号采集数据的处理................................20
     3.2.2.1数据采集系统的构成.................................. 20
 3.2.2.2 数据采集技术....................................... 21
 3.2.2.3采集系统............................................ 21
 3.2.3功率因数的测量............................................ 26
第4章 测试系统的软件部分............................................28
    4.1 总体的设计方案............................................. 28
4.2 输人模块......................................................... 28
4.3 采样模块......................................................... 28
4.4 计算模块. ........................................................29
4.5 显示模块......................................................... 30
4.6 控制模块......................................................... 30
第5章 变频器的抗干扰.................................................. 31
5.1变频器干扰问题的现状............................................. 31
5.2 变频器谐波产生机理...............................................31
5.3谐波干扰途径和危害............................................... 32
 5.3.1 变频器输入侧高次谐波对其它设备的干扰.......................32
 5.3.2 变频器输出侧高次谐波对其它设备的干扰.......................32
5.4抑制谐波干扰的对策............................................... 33
 5.4.1防止变频器输入侧高次谐波干扰的对策......................... 33
 5.4.2在变频器输出侧的对策.......................................33
 5.4.3在变频器输出侧的对策其它抗干扰的方法....................... 34
结束语................................................................35
参考文献..............................................................36
致谢..................................................................37

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