绕制性优及改善环境的自粘性复合漆包线

为了更合理的制造线圈绕组 ,提高设备的可靠性及改善环境 ,近年来 ,自粘性复合漆包线正在扩大其应用。自粘性复合漆包线的绝缘层外有一层粘结层 ,只需通过简单的加热就能使线圈粘结在一起。尤其适用于电视机和显示器的偏转线圈 ,以及汽车用电气装置和其它用途。日立电线公司完成了新型自粘性复合漆包线产品的开发 ,满足了偏转线圈低温粘结和改善润滑性能的需要。也开发了高温度时具有高的粘结强度和低气味润滑挥发物的耐热自粘性复合漆包线。该产品特别适用于需要可靠性高和环境保护好的汽车用电气装置 ,这些产品可望在各个种领域中得到广泛应用     

铜包铝复合线材制造技术的发展现状与前景

介绍了铜包铝复合线材的性能构特点与应用情况。对铜包铝复合线材的工艺方法与最新研究进行了总结,探讨了铜包铝复合线材制造技术的发展趋势,认为减少工序,实现连续化生产是工艺研究与开发的方向。     

Ac losses in superconducting coils

AC superconducting wire is being developed for such electrical equipment as superconducting transformers and superconducting generators. AC loss reduction is of primary concern in the development of such high-efficiency equipment. In reducing ac losses, it is necessary to develop assessment methods for ac loss in test samples which have shapes similar to the end-product equipment. This paper described a least squares calculation of ac losses of superconducting wire as a function of frequency and magnetic field strength measured in test coils. Two sample solenoid coils were made to test the influence of different capacities and winding methods on ac losses in ac superconducting coils with rated capacities of 500 kVA and 20 kVA, and impregnated (epoxy resin) and nonimpregnated windings. The ac losses in the superconducting coils were measured by a calorimetric method using the evaporating rates of liquid helium. Estimated ac losses in the superconducting wire of the two coils were compared with Joule losses of copper conductors at ambient temperature. As a result of this comparison, a low-loss ac superconducting wire winding can be made for electrical equipment rather than employing conventional copper winding when used under low magnetic fields less than 0.5 T.     

AC losses in superconducting coils

AC superconducting wire is being developed for such electrical equipment as superconducting transformers and superconducting generators. AC loss reduction is of primary concern in the development of such high-efficiency equipment. In reducing ac losses, it is necessary to develop assessment methods for ac loss in test samples which have shapes similar to the end-product equipment. This paper describes a least-square calculation of ac losses of superconducting wire as a function of frequency and magnetic field strength measured in test coils. Two sample solenoid coils were made to test the influence of different capacities and winding methods on ac losses in ac superconducting coils with rated capacities of 500 kVA and 20 kVA, and impregnated (epoxy resin) and nonimpregnated windings. The ac losses in the superconducting coils were measured by a calorimetric method using the evaporating rates of liquid helium. Estimated ac losses in the superconducting wire of the two coils were compared with Joule losses of copper conductors at ambient temperature. As a result of this comparison, a low-loss ac superconducting wire winding can be made for electrical equipment rather than employing conventional copper winding when used under low magnetic fields under 0.5 T.     

铜及铜合金线的氧化及防止

:铜及铜合金线在生产、贮存、运输过程中极易发生氧化及变色。这种氧化反应在本质上大多属于电化学腐蚀电池效应 ,其发生的必要条件是环境相对湿度达到或大于临界湿度。防止这种氧化反应除贮存在烘房 (箱 )内或密封包装并放入吸 (除 )湿剂外 ,采用缓蚀剂苯并三氮唑 (BTA)处理是一种行之有效的方法 ,对于铜及铜合金线的出口或远距离运输尤为适合     

特种绕组线的发展

本文简要的介绍了国内外最近绕组线 (包括纤维绕包线、薄膜绕包线、纸包组合及换位导线等 )及部分特种绕组线 (如无机绝缘电磁线、耐高温耐辐射电磁线、绞合电磁线、片状成型线圈等 )发展动态。另外 ,还介绍了绕包工艺及设备的最新进展     

浅谈提高SNL17D+57kVA中拉机退火铜线质量的几种方法

本文分析了中拉机退火铜线产品质量缺陷产生的原因 ,并提出了相应的工艺、工装改进措施 ,对中拉机退火冷却循环系统进行改进。     

关于正确使用携带型短路接地线的探讨

介绍了黑龙江省电力系统接地线使用的状况。对短路接地线允许电流值进行了理论计算，分析了保护动作时间对不同截面积短路接地线允许电流的影响。通过电网运行数据与计算数据的对比分析，提出了具有操作性的建议，可引导技术人员正确选择和使用接地线，确保人身和设备安全。     

铜扁线生产工艺中的配模机理及计算机管理

本文主要论述铜扁线生产工艺流程中的配模机理 ,设计几何模型推导出配模的计算公式 ;并且利用计算机将配模计算的过程输入 EXCEL 电子表格中 ,对配模工艺进行电脑化管理     

汽车用线缆的新发展

本文介绍随着汽车工业的现代化而对汽车内所用的电线电缆的改进。这些改进主要是用双金属线(铜包钢和铜包铝)来替代传统的铜导线;用新型的可交联聚酯弹性体来替代传统的绝缘材料。其主要目的在于减小线缆的尺寸和重量,增加了线缆的柔软性、耐热水性和耐热性等机械物理性能。文章描述了这些新产品的开发、性能试验和应用。     

动态力学分析法测量蛇形互连铜导线疲劳性能

铜导线的疲劳性能是影响柔性电子设备使用寿命和可靠性的关键因素,因此提出对膜-基结构疲劳性能定量测试方法。首先采用纳米动态力学分析技术,分析柔性基底上沉积厚度为25~400 nm铜导线的粘弹性参数变化规律,确定膜-基结构的疲劳寿命。其次通过扫描电子显微镜(SEM)观察分析铜导线的微观晶粒结构,探究导线厚度影响膜-基结构疲劳性能的机理。最后对不同厚度铜导线的测试结果进行分析总结,优化柔性电子器件长度尺度工艺设计参数。结果表明,沉积100 nm以上厚度铜导线疲劳寿命在数百万次,晶粒分布均匀,平均晶粒尺寸为50 nm,晶粒的稳定分布抑制位错运动,疲劳性能可靠。因此柔性基底上沉积100 nm厚度的铜导线在提高柔性电子器件使用寿命方面极具优势。     

动态力学分析法测量蛇形互连铜导线疲劳性能

铜导线的疲劳性能是影响柔性电子设备使用寿命和可靠性的关键因素,因此提出对膜-基结构疲劳性能定量测试方法。首先采用纳米动态力学分析技术,分析柔性基底上沉积厚度为25～400 nm铜导线的粘弹性参数变化规律,确定膜-基结构的疲劳寿命。其次通过扫描电子显微镜(SEM)观察分析铜导线的微观晶粒结构,探究导线厚度影响膜-基结构疲劳性能的机理。最后对不同厚度铜导线的测试结果进行分析总结,优化柔性电子器件长度尺度工艺设计参数。结果表明,沉积100 nm以上厚度铜导线疲劳寿命在数百万次,晶粒分布均匀,平均晶粒尺寸为50 nm,晶粒的稳定分布抑制位错运动,疲劳性能可靠。因此柔性基底上沉积100 nm厚度的铜导线在提高柔性电子器件使用寿命方面极具优势。     

漆包线产品标准、试验标准与检测设备的发展动向

近年来随着电机、电器、家电行业产品的发展 ,漆包线作为原材料 ,其性能要求也日益提高。而目前我国实施的产品标准和试验方法标准并没有作相应的更改。本文将国内外部分漆包线产品标准、试验方法标准以及检测设备的发展情况作一个介绍     

镀镍软铜线制造工艺的改进——氨基磺酸盐镀镍

本文阐述了硫酸盐镀镍制造镀镍软铜线的不足之处 ,介绍了氨基磺酸盐镀镍制造镀镍软铜线的优点 ,并论述了氨基磺酸盐镀镍的工艺、设备和废水处理 ,建议对于要求特高的耐高温电缆所用的镀镍铜线采用氨基磺酸盐镀镍比较合适     

新型金属镀层材料在镀层铜线上应用

介绍了一种新型金属涂层材料——锡 -铅 -稀土合金在电线电缆行业中应用。它不但具有价格上优势 ,还能满足镀锡铜线各项性能指标 ,保护铜线表面而不氧化 ,更能提高导线的可焊性 ,有较好的应用前景     

绿色环保型制冷压缩机引出线的研制

该文介绍了环保 R134 A、R410 A、R40 7C等制冷工质对制冷压缩机引出线的萃取率的要求 ,论述了编织用聚酯丝为什么要进行萃取和清洗 ,用什么方法进行萃取 ,并介绍了制冷压缩机引出线耐制冷剂试验方法 ,对适合于新型制冷工质的环保型引出线的研制情况进行了说明。     

尼龙护套线的生产

介绍了尼龙护套线品种及材料性能。对尼龙护套的挤出设备的要求和提高产品质量的措施也作了较详细的说明。     

High conductivity copper

A round for centuries, copper remains an important metallic element in the world today. Copper's high electrical and thermal conductivity as well as its excellent corrosion resistance makes it ideal for use in the electrical, electronics, telecommunication, and construction industries. Electrical and electronic applications already consume more than 50% of all copper and will probably place further demands in the future. The trend to achieve better performance, with more consistent and improved properties, challenges manufacturers to produce higher-purity copper and higher conductivity copper with the right combination of properties for specific applications     

铜、铝导体生产的发展趋向及有关问题的探讨

本文综合分析了我国铜、铝及它们的合金导体在品种、质量和生产装备方面的现状和国外在该领域的进展及发展趋向,并指出:我国铜、铝导体的年用量已名列世界前茅,但导体的品种少,工艺装备落后。其中铝连铸连轧生产线比铜的更落后,主要差距在计算机监控系统,由此也限制了品种的发展;废铜在导体上的应用,要提高质量关键在于所用废铜原材料的级别、熔炼炉及熔炼工艺;铜杆质量不能满足电缆工业发展的需要,修订电工用铜杆国标或制订行业标准,实行铜杆分等使用已是势在必行;我国电缆工业需要建立真正意义上的从金属材料、镀层、导体结构到绝缘材料特种的电缆厂;行业协会在组织行业内部带有共性问题的科技攻关,与产业界、行业间的协调和科技合作方面应起到更大的作用;应发挥综合优势,加强材料、工艺、产品与设备的联合攻关,实现科技与生产的创新。     

Development of kA-class alternating current superconducting conductors and fabrication of a prototype coreless superconducting autotransformer

Recently, multifilamentary superconducting wires with very low ac losses have been produced and practical applications will now be considered. To realize actualsize power machines and apparatuses, it is necessary to develop 1 - 10 kA ac conductors. However, the critical currents of multifilamentary wires at 1 T are several tens of A, and therefore it is necessary to use multistrand conductors consisting of several tens or several hundreds of strands. Such conductors sometimes show ac current degradation because of such factors as (1) nonuniform current distribution, (2) wire motion, (3) temperature increase, (4) longitudinal magnetic field effect, etc. Formerly, a coreless transformer was considered unpractical because of its large exciting current. However, Yamamoto and others proposed that a coreless superconducting transformer could be used as a stepdown autotransformer at the receiving side, utilizing its large exciting current as the reactive power source to cancel the charging current of an underground transmission line or UHV line, and therefore the shunt reactors could be eliminated. In this paper, development of ac-superconducting conductors aimed at prevention of current degradation are discussed, as well as quench test results of two small coils made with these conductors. In these conductors, low ac low strands with ultrafine NbTi filaments are twisted around a central bundle of stainless steel wires. One of the coils has been designed as a model coreless autotransformer, and its test result is also described.