研究·分析·实验

银金属氧化物触点材料电气性能研究//张为军,堵永国,胡君遂//

摘要:以粉末冶金法制备的AgCdO(10)、AgSnO₂(10)、AgYb₂O₃(12)三种银金属氧化物触点材料为研究对象，在DC 20V、20A，纯阻性负载条件下，研究其电气性能，包括接触电阻、熔焊力与材料转移。采用SEM观察触点表面经电弧侵蚀后结构与成分的变化，分析触点对电弧响应的物理冶金过程。结果表明，经过15万次接通与开断后，AgYb₂O₃(12)触点表面结构与成分稳定，而AgCdO(10)与AgSnO₂(10)触点表面存在孔洞与裂纹； 在相同负载条件下，AgYb₂O₃(12)的综合电气性能优于AgCdO(10)和AgSnO₂(10)触点材料。

Study of Service Performance of Silver Metal Oxide Contact Material //ZHANG Wei_jun, DU Yong_guo, HU Jun_sui//

Abstract:The service performance of three kinds of contact materials by powder metallurgical (AgCdO(10), AgSnO₂(10) and AgYb₂O₃(12)) was studied in 20A 20V DC loading condition，such as contact resistance, welding force and material transfer. The structure and component change of contact surface were studied by SEM after arc erosion. The physical metallurgy process of contact surface was analyzed during arcing. The result isthat the structure and component of AgYb₂O₃(12) contact surface are stable but there are some pore and crack in AgCdO(10) and AgSnO₂(10) contact surface after 150000 make_and_break operations. The integrative service performance of AgYb₂O₃(12) exceeds AgCdO(10) and AgSnO₂(10) in same loading condition.

AgSnO₂系线材产品的电性能试验分析//刘立强,倪泽胜,黄光临,李国伟//

摘要：对化学法工艺制备的含不同添加物的AgSnO₂系线材产品的性能及电寿命试验进行了分析，结果表明，该工艺制备的材料金相组织均匀，材料综合性能较为均衡，可制备高SnO₂含量的产品。电寿命试验对比数据表明，应根据触点的使用条件选用适当的材料品种，以满足该材料较强的个性化特点，并可在一定范围内选择更为合理的低成本添加物，提高材料的相关性能。

Analysis of Electric Performance Test of AgSnO₂ Wire Products
//LIU Li_qiang, NI Ze_sheng, HUANG Guang_lin, LI Guo_wei//

Abstract: Through the analysis of properties and electric performance test results of AgSnO₂ wire products with different additives by chemical processes, it shows that the materials made by this process have even microstructure and good properties, as well as high percent SnO₂ of AgSnO₂ wire products. Comparing with the electric performance test results, we draw the conclusions that the suitable material should be chosen according to the application conditions. It is possible to improve properties of AgSnO₂ material by using low_price additives.

AgSnO₂-Bi₂Sn₂O₇触头材料制备及应用//刘辉,覃向忠//

摘要：采用雾化工艺制备含有多种添加元素的AgSnBi合金粉。合金粉氧化后经过扩散处理、压制、烧结、挤压、轧制或拉丝得到AgSnO₂-Bi₂Sn₂O₇系列银复合氧化锡材料。丝材加工制作成铆钉触头，在ZWP－1型电性能模拟试验机上与AgNi（10）、AgCdO（12）进行直流、灯负载条件模拟电寿命对比试验。结果表明， 银复合氧化锡材料、AgNi（10）、AgCdO（12）的电寿命分别为132358～148153次、 15930～17300次、6054～8038次。将银复合氧化锡材料装在商用开关上进行电性能型式试验，常规操作寿命试验和荧光灯负载开关试验后端子的最高温升分别为42.5 K和17.1 K。

Manufacture and Application of AgSnO₂-Bi₂Sn₂O₇ Contact Materials
//LIU hui, QIN Xiang_zhong//

Abstract: AgSnO₂-Bi₂Sn₂O₇ are a series of silver_compound tin oxide contact materials. AgSnBi alloy powder with multiple additives was first made by atomization and then oxidized. After a series of processes of diffusion treatment, isostatic compaction, sintering, extrusion,rolling or drawing,AgSnO₂-Bi₂Sn₂O₇ material was obtained and made into rivet contacts which was tested on the ZWP－1 electrical model tester and compared with AgNi(10) and AgCdO(12) at DC lampload. The test results show that the electrical lives of AgSnO₂-Bi₂Sn₂O₇ , AgNi(10) and AgCdO(12) are 132 358～148153、15930～17300、6 054～8038 cycles respectively. In addition, the AgSnO₂-Bi₂Sn2O7 material was assembled in a commercial switch for testing. After the normal operation life test and the fluorescent lamp load switching test, the maximum temperature rises at the terminal are respectively 42.5 K and 17.1 K.

纤维复合AgNi线材的工艺研究//王永根，童意平，刘立强//

摘要：研究了一种生产纤维复合AgNi线材的工艺。本工艺采用特殊塑性加工和纤维强化的方法，增强了材料的综合物理性能。本工艺制备的AgNi线材应用于小电流等级电器中，是一种较佳的代Cd触头材料。

Study on the Process of the Fibre Composite AgNi Wire
//WANGYong_gen, TONG Yi_ping, LIU Li_qiang//

Abstract: Introduced a process to gain AgNi wires with fibre structure. The methods of the special plastic working and the fibre strengthening have been adopted in this process, which are useful to improve the AgNi wires' physical performances .The result shows the AgNi wires made by this process are much better than those traditional ones and also become a better material to replace the cadmium contained material in the small current class electrical appliances .

放电电弧电磁力计算与气体开关电极机械性能的选择//何孟兵，周圣，李志鹏//

摘要：当气体火花开关闭合时，开关电极之间会产生强烈的大电流电弧，电极内部开始有电流流动。电弧电流产生的磁场和电极中的电流相互作用会产生强大的机械力冲击电极表面进而影响开关的性能。本文计算了开关电弧对电极的电磁冲击力，并对开关电极材料机械性能的选择提出了建议。

Caculation of Arc Magnetic Pressure on Electrode Surface and Choice of Electrode Mechanical Property
//HE Meng_bing, ZHOU Sheng, LI Zhi_peng//

Abstract: When spark switch closes,an electric arc forms between the electrode,and current conduction begins. The strong mechanical force generated as the arc forms impacts the electrode and has effects on switch performances. This investigation calculates the pressure generated by high arc current and present some conclusions and recommendations on the choice of electrode mechanical property.

HDDR工艺对Nd₁₅Fe₆₆Co₁₂B₇各向异性的影响//林培豪,陈旭//

摘要:从氢与Nd₂(Fe，M)₁₄B相互作用的热力学和动力学出发，研究了HDDR工艺对Nd₁₅Fe₆₆Co₁₂B₇磁粉各向异性的影响。结果发现，氢化歧化初期减慢歧化速度，可提高磁粉的各向异性；脱氢再复合初期通过升高温度或降低氢气压来增加脱氢再复合速度，可提高磁粉的各向异性；脱氢再复合初期，加入氩气处理，会降低磁粉的各向异性；在脱氢再复合中再复合驱动力过大，不利于磁粉各向异性的提高。

Effects of HDDR Process Anisotropy in Nd₁₅Fe₆₆Co₁₂B₇
//LIN Pei_hao, CHEN Xu//

Abstract: This project study on the influence of HDDR process to the anisotropy of Nd₁₅Fe₆₆Co₁₂B₇ magnetic powder from the interactive thermodynamics and kinetics of the hydrogen and Nd₂(Fe，M)₁₄B. The result shows that slowing the disproportion process at the beginning of hydrogenation_disproportion process can enhance the anisotropy of magnetic powder; Accelerating desorption_recombination by increasing the temperature or reducing the hydrogen air pressure at the beginning of desorption_recombination process can enhance the anisotropy of magnetic powder too;the additive of argon at the beginning of desorption_recombination process can weaken the anisotropy of magnetic powder; the too large driving force in the desorption_recombination process is not conducive to the improvement of the anisotropy.

综述·动态

IEEE Holm电接触会议介绍//邵文柱，崔玉胜//

摘要：IEEE Holm电接触会议是由IEEE的专业技术协会与IEEE Holm电接触会议执行委员会共同组织的电接触领域内代表国际最高水平的国际会议之一。第一届会议始于1953年，此后基本上每年举行一次，最近一次是2006年9月刚刚在加拿大蒙特利尔举行的第52届年会。本文介绍了Holm会议的发展历程、相关活动、国内作者的参会情况和国内外与电接触相关的会议信息。

An Introduction of IEEE HolmElectrical Contact Conference
//SHAO Wen_zhu, CUI Yu_sheng//

Abstract: The IEEE Holm Conference is sponsored and organized by IEEE CPMT Committee and IEEE Holm Electrical Contact Conference committee, and is held almost annually since 1953. The 52nd IEEE Holm conference was just held in Montreal, Canada in September 2006. It is one of the most famous international conferences concerning about the electrical contacts phenomena and its applications. The history of the Holm conference, the major relative activities, attend records of authors from China and relative conferences concerning about electrical contact territories are introduced.

电子电器用橡塑材料行业应对RoHS和PAHs指令的措施//方万漂,张 磊,李 卫, 张 乔,相 军,张伟娇,陈 琦//

摘要：《RoHS指令》、《PAHs指令》等环保技术法规的出台，对我国电子电器行业造成的影响深远。本文从材料的角度提出了应对《RoHS》等环保指令相应的措施和建议。

“十一五”电工合金标准化工作要点//赵红一，谢永忠，陈京生//

摘要:介绍了“十五”电工合金标准化工作的情况，分析了电工合金标准化工作的现状及发展趋势，提出了“十一五”期间电工合金标准化工作的重点任务、重点领域及重点项目，阐述了“十一五”期间做好电工合金标委会工作的思路。

真空高压二极管中电子回流的研究//林惠祖//

摘要：真空高压二极管中的电子回流是造成绝缘子表面闪络的重要因素。本文分析了磁场和电场对真空中高压二极管电子回流的影响。在存在磁场及回流电子的情况下，建立了更接近实际的物理模型。采用理论计算和数值模拟的方法分析了电子回流对绝缘子耐压能力的影响，并在绝缘子设计原则的基础上提出了减弱电子回流对绝缘子耐压能力影响的方法。

Study on the Reflux of Electron of High Voltage Vacuum Diode
//LIN Hui_zu//

Abstract: Reflux of electron of high voltage vacuum diode is one of the main factors to cause the dielectric surface flashover. In this paper, the magnetic field's and the electric field's influence on the reflux of electron of high voltage vacuum diode is analyzed. The influence of the existence of the magnetic field and the reflux of electron on the HV hold off capability of insulator is discussed. The discussion is based on physical model more approach reality, theoretic calculation and numerical simulation. Base on some principles of design the insulator, some ways to weaken the reflux of electron are put forward.

基于MATLAB的静止无功发生器的控制方法研究及仿真//肖学文， 文小玲//

摘要:静止无功补偿技术越来越受到人们的重视。本文根据静止无功发生器的基本原理，简要论述了静止无功发生器的一般控制方法，并从电流直接控制和电流间接控制方式入手，建立了两种不同控制方式的MATLAB仿真模型，通过仿真后波形分析验证了这两种控制方式的特点。

Study on Control Method of Static VAR Generator and its Realization
//XIAO Xue_wen, WEN Xiao_ling//

Abstract:The technique of static var generator is considered more and more important. This article founded on the basic principle of static var generator, concisely introduces the common control method of it. Than starts with current direct and indirect control mode, it designs two emulational mode based on the tow different control quomodo, and validates the characteristics of these two different control modes through the wave analysis after simulation.