電流繼電器設計

電子機電論文編號:JD153  字數:30694,頁數:54

目   錄
摘要..............................................................................I
Abstract ........................................................................II
第1章  緒論.......................................................................1
1.1 繼電器發展史..................................................................1
1.2 電流繼電器簡介................................................................3
第2章  電磁系統的設計.............................................................4
2.1 概述..........................................................................4
2.2 電磁系統的基本特性............................................................6
   2.2.1 吸力特性.................................................................6
   2.2.2 反力特性.................................................................6
   2.2.3 時間特性.................................................................6
2.3 電磁系統結構形式的選擇........................................................7
   2.3.1 從吸力與反力特性配合來選擇電磁鐵的結構形式...............................7
2.3.2 用結構因素選擇電磁鐵的結構形式..............................................8
2.4 電磁系統的設計要點............................................................9
2.5 氣隙磁導的計算...............................................................10
   2.5.1 數學分析法..............................................................10
2.5.2 分割磁場法.................................................................10
2.6 交流磁路及吸力計算...........................................................11
2.6.1 交流磁路計算...............................................................11
2.6.2 交流電磁吸力計算...........................................................13
2.7 交流電磁系統的設計...........................................................14
    2.7.1 初步設計的基本關系式...................................................14
    2.7.2 初步設計的步驟.........................................................16
2.8分磁環設計....................................................................21
第3章  觸頭系統..................................................................23
3.1 概述.........................................................................23
3.1.1 電接觸的概念...............................................................23
3.1.2 對觸頭的基本要求...........................................................24
3.1.3 觸頭的種類.................................................................25
3.1.4 觸頭結構形式的選擇.........................................................25
3.2 接觸電阻.....................................................................26
3.2.1 接觸電阻的形成.............................................................26
3.2.2 接觸電阻的計算公式.........................................................27
3.2.3 影響接觸電阻的因素.........................................................27
3.3 觸頭材料的選用要點...........................................................28
3.3.1 對觸頭材料的要求...........................................................28
3.3.2 常用的觸頭材料.............................................................30
3.4 觸頭溫升及其計算.............................................................31
3.4.1 觸頭穩定溫升...............................................................31
3.4.2 觸頭的允許溫升.............................................................31
3.4.3 觸頭穩定溫升的計算公式.....................................................31
3.5 觸頭的振動及其計算...........................................................32
3.5.1 觸頭的振動.................................................................32
3.5.2 觸頭振動的計算公式.........................................................32
3.6 觸頭磨損及其計算.............................................................33
3.6.1 觸頭磨損的形式.............................................................33
3.6.2 電磨損及其計算.............................................................34
3.7 觸頭主要參數的選擇和確定.....................................................35
3.7.1 觸頭開距的選擇.............................................................35
3.7.2 觸頭超程的選擇.............................................................35
3.7.3 觸頭的初壓力和終壓力的確定.................................................36
3.7.4 觸頭尺寸及材料的選擇.......................................................37
第4章  PRO/E輔助設計.............................................................38
4.1 PRO/E簡介....................................................................38
4.2 PRO/E設計....................................................................38
第5章  ANSYS分析.................................................................41
5.1 概述.........................................................................41
5.2 ANSYS分析的基本概念與步驟....................................................42
結束語...........................................................................45
參考文獻.........................................................................46
致謝.............................................................................47
附圖  JL15電流繼電器.............................................................48

基本任務及要求：
    本課題要求設計一臺可用于交流50Hz、電壓380V以下，作為電力系統中的過電流保護元件的過電流瞬時動作的繼電器，它主要由交流電磁系統、觸頭等部分組成，要求根據技術條件要求完成電磁系統和觸頭系統的初步設計，并用PRO/E等軟件輔助完成實體造型設計，用有限元法、ANSYS軟件對電磁系統進行電磁場分析，并結合吸力與反力配合關系進行優化設計。                                                       
技術指標：
1、工作制為長期工作制；                                                              
2、安裝地點的海拔不超過2000m；周圍空氣溫度上限不高于＋40℃，下限不低于—5℃；        
3、繼電器的觸頭約定發熱電流為5A；繼電器的觸頭數量為2對，觸頭組合形式為一常開一常閉；
4、繼電器的吸引線圈的額定工作電流為2.5A；電磁鐵結構形式為拍合式。                    

電流繼電器設計

摘  要：在現代電力系統中，繼電保護裝置是保證電力系統安全運行和提高電能質量的
重要工具，而且，電力系統的規模在不斷擴大，用戶對電能質量的要求也在不斷提高。因此，對繼電保護裝置本身的要求也越來越高。電流繼電器是反映電路電流變化而動作的電器。它用于電動機或其他負載的過載及短路保護、直流電機磁場控制或失磁保護等。電流繼電器根據用途不同可分為過電流繼電器,欠電流繼電器。本文討論的是電流繼電器的設計。根據技術要求，對繼電器的電磁鐵、氣隙磁場的分布、各參數的合理選擇，觸頭系統等多方面的情況進行了研究，并結合PRO/E進行輔助設計,用ANSYS軟件進行有限元分析,從而確定了有效的實施方案。
關鍵詞：繼電保護；電流繼電器；電磁系統；觸頭系統；有限元分析

The Design of A Current Relay

Abstract：Protection relay is the most important tool to make the power system work safely and improves the quality of power energy.With the expansion of the power system and the consumer raising higher requirement for quality of power energy,the protection r elay must be improved greatly and fulfill the high requirement. Electric current relay reflect circuit electric current changes but electric apparatus of movements. It used in motor or other overload of load and short out protection, direct current machine magnetic field control or lose magnetism not to protect etc.Electric current relay with can is it for pass electric current relay , owe electric current relay to divide according to use. In this paper, the method of design for currrrent relay is discussed. By the request of technologies, the electromagnetic system , airgap flux distribution and parameters of relay are researched，and combining the Pro/e proceeding the assistance designs, proceeding the limited dollar analysis with ANSYS. An effective method of design is implemented, according to the result of research..
Keywords: power system protection; current relay; electromagnetic system; spring system; thermal analysis