SF6气体绝缘电容式电压互感器研制

本文介绍西容公司新研制的一种完全无油化的SF6气体绝缘电容式电压互感器,提出了关键技术问题解决方案和产品绝缘结构的设计思路.并介绍了研制成功的110kV和220kV系列产品的结构、技术参数、性能指标、试验考核情况和产品特点.     

IGBT无损吸收网络的设计

提出一种模块化IGBT无损吸收网络，介绍了其缓冲吸收原理、元件参数计算及一些注意事项。     

一种基于相关函数法铁磁谐振波形研究

对铁磁谐振波形进行了系统的分类分级,提出了一种基于Matlab的相关函数方法,并且利用大量数据进行对比,已经得到了效果验证,经过桂林市电力电容器责任有限公司认证,具有良好的实际效果。     

Electrodeposition of polypyrrole on aluminium in aqueous tartaric solution

The electrosynthesis of polypyrrole (PPy) has been achieved on aluminium in aqueous medium of tartaric acid by means of cyclic voltammetry, potentiostatic and galvanostatic techniques. Scanning electron microscopy (SEM) and X-ray microanalysis by energy spectroscopy dispersion (EDS) applying on surfaces show that the PPy coating is developed from the metal surface through the cracks of the initial Al₂O₃ layer.A mechanism involving the participation of the supporting electrolyte and the pyrrole (Py) in distinct active sites was proposed based on the linear sweep voltammetry. It is observed for all applied electrochemical techniques that the pyrrole concentration has to be higher than 0.1 M to allow the polypyrrole electrodeposition in acid medium.Scanning electron microscopy, secondary electrons (SE) and backscattering electrons (BE), shows that the PPy coating obtained in galvanostatic and potentiostatic modes starts with small islands at weak applied potentials or current densities. Moreover, EDS reveals a good homogeneity and compactness of the film achieved in galvanostatic method. The corrosion results in 3% NaCl medium show that the PPy coating decreases the corrosion behaviour of the aluminium. The bilayer Al₂O₃/PPy shows a capacitor with future applications.     

接触器铁芯间隙的快速测量

本文介绍了应用单片机和电容传感器技术来检测交流接触器铁芯气隙的快速测量仪。     

High temperature field effect hydrogen and hydrocarbon gas sensors based on SiC MOS devices

The growing need for reliable, efficient, high temperature hydrogen and hydrocarbon monitoring has fueled research into novel structures for gas sensing. Metal oxide semiconductor (MOS) devices employing a catalytic metal layer have emerged as one of the leading sensing platforms for such applications, owing to their high sensitivity and inherent capability for signal amplification. The limited operating temperature of such devices employing silicon as the semiconductor has led research efforts to focus on replacing them with devices based on silicon carbide (SiC). More recently, MOS devices having different oxide layers exhibiting improved sensing performance have emerged. Considering the amount of research that has been carried out in this area in recent times, it is important to elucidate the new findings and the gas interaction mechanisms that have been ascribed to such devices, and bring together several theories proposed by different research groups. In this paper we first highlight the needs which have driven research into SiC based field effect hydrogen and hydrocarbon sensors, illustrate the various structures being investigated, and describe the device evolution and current status. We provide several sensing examples of devices that make use of different oxide layers and demonstrate how their electrical properties change in the presence of the gases, as well as presenting the hydrogen gas interaction mechanisms of these sensors.     

一台220kV电容式电压互感器的故障分析

通过一台电容式电压互感器的故障分析，提出对电容式电压互感器的维护以及预防性试验的一些看法。     

异步电动机电容补偿起动过程的仿真研究

为了得到三相异步电动机电容补偿起动过程的运行特性，建立了三相异步电动机电容补偿起动系统在α—β坐标系下的数学模型，模型中考虑了转子参数随转速变化的因素。通过实例对三相笼型异步电动机的电容补偿起动过程进行仿真计算。仿真结果表明，异步电动机采用电容补偿起动，可以降低起动电流，提高电机起动转矩，缩短起动时间，是一种具有实际应用价值的起动方法。     

产品标牌自动打印装置应用研究

为了降低CVT、并联电容器等产品标牌的制作成本,提高标牌的外观和打印的美观程度,通过市场调研,选择适合我公司标牌制作的材料,并经过对市场上的自动打印设备进行对比筛选,最终确定选用HDM-PC气动标记机来完成我公司产品标牌的制作.     

全膜电容器热稳定试验研究

全膜电容器由于绝缘性能优良，比特性远优于其它介质电容器。但正因为如此，其散热面积也远小于其它介质电容器。因此，其热的稳定特性并不一定就优于其它电容器。本文通过对电容器比例单元热稳定性能的试验研究，确定了内部最热点与外壳最热点的关系，为更好地做好电容器热稳定性能试验提供了参考依据。