變頻電機試驗計算機采集與處理系統的設計

電氣自動化論文編號:ZD390  論文字數:20718,頁數:43，
目    錄
摘   要 ............................................................Ⅰ
Abstract...........................................................Ⅱ
第1章 概述.......................................................... 1
 1.1變頻電機測試技術的現狀............................................1
 1.2變頻電機的簡介.................................................. 2
 1.2.1變頻電機的簡介...............................................2
 1.2.2變頻電機測試的介紹...........................................2
 1.2.3變頻電機試驗方法介紹.........................................4
 1.3  系統總體方案設計..............................................5
第2章 變頻器、傳感器、采集卡的介紹.................................... 6
 2.1變頻器..........................................................6
 2.1.1變頻器的簡介.................................................6
 2.1.2 交交變頻器的結構............................................ 7
 2.1.3三相交交變頻電路的輸入輸出特性...............................8
 2.2 傳感器........................................................ 9
 2.2.1傳感器的定義.................................................9
 2.2.2傳感器的組成.................................................9
 2.2.3電流傳感器的主要計算公式................................... 10
 2.2.4傳感器技術的現狀和發展動向..................................10
 2.2.5霍爾傳感器..................................................10
 2.3 采集卡 .......................................................... 13
第3章 電壓電流信號的采集與處理.......................................... 14
 3.1非正弦信號的采集..................................................14
 3.1.1信號的采集..................................................14
 3.1.2電壓、電流取樣..............................................15
 3.1.3采樣速率和采樣頻率..........................................18
 3.2電壓、電流信號的采集處理..........................................19
 3.2.1電參數的定義................................................19
 3.2.2電壓、電流信號采集數據的處理................................20
     3.2.2.1數據采集系統的構成.................................. 20
 3.2.2.2 數據采集技術....................................... 21
 3.2.2.3采集系統............................................ 21
 3.2.3功率因數的測量............................................ 26
第4章 測試系統的軟件部分............................................28
    4.1 總體的設計方案............................................. 28
4.2 輸人模塊......................................................... 28
4.3 采樣模塊......................................................... 28
4.4 計算模塊. ........................................................29
4.5 顯示模塊......................................................... 30
4.6 控制模塊......................................................... 30
第5章 變頻器的抗干擾.................................................. 31
5.1變頻器干擾問題的現狀............................................. 31
5.2 變頻器諧波產生機理...............................................31
5.3諧波干擾途徑和危害............................................... 32
 5.3.1 變頻器輸入側高次諧波對其它設備的干擾.......................32
 5.3.2 變頻器輸出側高次諧波對其它設備的干擾.......................32
5.4抑制諧波干擾的對策............................................... 33
 5.4.1防止變頻器輸入側高次諧波干擾的對策......................... 33
 5.4.2在變頻器輸出側的對策.......................................33
 5.4.3在變頻器輸出側的對策其它抗干擾的方法....................... 34
結束語................................................................35
參考文獻..............................................................36
致謝..................................................................37

【摘要】由于電機技術的不斷發展,變頻電機的使用越來越廣泛，所以對變頻電機的數據采集具有十分重要的意義.
 這次我們的重點是對輸入變頻電機的電壓、電流波形進行采集與處理,在傳感器部分我們采用了國內較為先進的LEM電壓電流傳感器,在數據采集部分由于波形發生了畸變,我們選擇了HY-8131高速數據采集卡。該系統通過軟硬件的模塊化結構，解決了瞬態變頻測試的一系列問題，本文還分析了系統的干擾誤差，闡述了為確保系統測試精度所采取的措施。
 除此之外，我們還介紹了變頻電機的基本特性，交交變頻器和交交變頻電路的基本情況和霍爾傳感器的基本原理。最后還介紹了變頻器的抗干擾問題。
【關鍵詞】交-交變頻電機  傳感器  數據采集系統  變頻器 
 
  
 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