交流接触器设计及其优化分析 二

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摘 要
 CJ20系列接触器是我国最近研制成功的交流接触器新系列，额定电压交流（50Hz）380V、660V和1140V，额定电流范围为4～630A，共分十一个电流等级。它的结构为直动式双断点立体布置。结构简单，占用安装面积小。衔铁为直动式，没有转动轴，动触头没有软连接，均有利于提高机械寿命。触头采用双断点结构，对于电压交流电弧的熄灭很有利，从而简化了灭弧装置。
 本文通过对CJ20系列交流接触器的各部分参数进行设计计算，并通过BASIC程序语言对其进行优化分析，以求能设计出性能更加优越的接触器出来，让CJ20系列交流接触器得到更加广泛的应用。首先对接触器各零部件的结构进行介绍：电磁铁采用单U直动式，非磁性气隙置于静铁心底部的中间，在使用过程中不会发生变化。分磁环用胶粘剂粘紧在静铁心的两个极靴上。线圈有骨架，机械强度比较好。导磁体上装有缓冲件。主动触头的触桥为船形结构，具有较高的机械强度和较大的热容量，主触头材料为银-氧化锡陶冶材料，具有较高的抗熔焊性和耐电腐蚀性。灭弧室有纵缝式和栅片式两种，纵缝式多用语额定电压380V和660V的接触器，栅片灭弧室用于额定电压660V和1140V的接触器。栅片灭弧室的栅片采用放射性布置方式，以减少电弧运动的阻力。灭弧室罩也是陶土制成的。辅助触头采用无色透明的聚碳酸脂制成的外壳，是封闭式结构，它制成单独的部件，放置在主触头的两侧，有4～6个辅助触头，还备有控制直流电路的大开距大超程辅助触头。在设计的最后完成阶段利用计算机对电磁铁部件进行优化分析，以达到预期的效果。

[关键词]：CJ20系列交流接触器、各零部件的设计计算、电磁铁的优化分析

Abstract
 The CJ20 series contactor is the new series of exchange contactor that our country succeeds in developing recently, exchanging (50Hz) 380V , 660V and 1140V in specified voltage, the specified electric current range is 4-630A, divides into 11 pieces of electric current grade altogether. Its structure is fixed up a bit more brokenly and three-dimensional for moving directly type pair. Of simple structure, is it install area to be little to take. The armature has not rotated the axle , does not have soft connection to touch the head to move for the moving directly type, help to raise the mechanical life-span . Touch head adopt pairs of broken some structure , exchange to put out as to voltage very much favorable electric arc, thus simplified the arc device of killing .
 This text, through designing calculating to every part of parameter of exchanging the contactor of CJ20 series, is it is it analyse to optimize to go on through BASIC procedure language to it, in order to be able to design performance superior contactor come out, let CJ20 series exchange the contactor and get more extensive application. Make an introduction to the structure of every spare part of the contactor at first: The electro-magnet adopts single U moving type directly , it is not the angry crack of magnetic that is put in the middle of the quiet unshakable in one's determination bottom, will not change in the course of using. It is tight on the boots very much in quiet two unshakable in one's determination to divide the magnetic ring to glue with the adhesive. Kill arc room it puts on to be whom potter's clay make too. Auxiliary to touch head adopt colourless transparent outer cover that polycarbonate make , closed structure, it make single part, is it touch both sides of head mainly to put , have 4-6 auxiliary to touch hair, is it control direct current way heavy to turn on from heavy to exceed Cheng auxiliary to touch hair to have also. Utilize the computer to optimize analysing to the part of the electro-magnet during the course of finishing at the end that is designed, in order to reach the anticipated result.

[Key Words]：CJ20 series exchange the contactor     The design of every spare part is calculated
               Optimization analysis of the electro-magnet
目   录
摘要  Ⅰ
Abstract Ⅱ
第1章 绪 论 1
    1.1交流接触器的作用与地位 1
    1.2交流接触器的发展概况 1
    1.3交流接触器的主要技术参数 2
    1.4接触器的结构选型 5
 1.5课题主要要完成的工作 6
第2章 触头系统的设计计算 7
    2.1设计时对触头的基本要求 7
    2.2确定主触头结构形式及其使用材料 7
    2.3确定主触头尺寸及参数 8
 2.4验算主触头温升及动热稳定性 10
    2.5辅助触头的设计 13
第3章 灭弧系统的设计 17
    3.1接触器的熄弧原理及方法 17
 3.2接触器的常用灭弧装置及材料 18
 3.3选择触头灭弧系统的结构形式及尺寸 19
    3.4验算主触头灭弧系统性能 19
第4章 电磁系统的设计 21
     4.1主要技术数据 21
     4.2电磁系统反力特性的计算 22
     4.3选择电磁铁的结构形式 23
     4.4单U型电磁铁的设计计算 23
第5章 电磁铁的优化设计 36
 5.1优化准则 36
 5.2优化设计的步骤 38
     5.3优化结果 38

5.3提高使用电寿命的措施 38
总结与展望 40
参考文献 41
致  谢 42
附录A 优化程序 43
附录B 总装配图与主要零部件图 

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