|
|
中国电机工程学报 2008, 28(18) 119-124 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
|
|
|
|
本期目录 |
下期目录 |
过刊浏览 |
高级检索
[打印本页]
[关闭] |
|
| 电机与电器 |
|
|
微放电发射电流法测量灭弧室真空度 |
|
|
赵子玉 宋焕生 江秀臣 马乃祥 罗利文 王建伯 刘崇方 |
|
|
上海交通大学电气系 长安大学信息学院 上海交通大学电气系 上海交通大学电气系 上海交通大学电气系 上海交通大学电气系 广东必达电器有限公司 |
|
|
摘要：
真空灭弧室真空度的传统测试方法主要有磁控放电法及工频耐压法。磁控放电法需要使用磁场线圈，而工频耐压法只能检出严重漏气的灭弧室。该文使用微放电起始电压Ud与发射电流起始电压Ue之比Ud/Ue测量灭弧室的真空度。该方法不需要施加磁场，而是使用下述方法进行测量：将闭合的灭弧室触头强行拉开0.2~0.3 mm，然后在触头间隙上施加工频高电压，利用间隙微放电电流对触头表面进行老练，以除去触头表面原有的吸附层，最后再测量间隙的微放电起始电压Ud与发射电流起始电压Ue。理论研究表明，真空灭弧室内的真空压强p越小，Ud/Ue越大，故通过测量Ud/Ue的大小，就可以获得真空灭弧室内的真空度。文中在实验室的真空比对系统上对不同管型灭弧室的Ud、Ue、Ud/Ue与真空压强p的关系进行了测试，测试结果表明，该文提出的Ud/Ue法，其真空度测量范围能达到100~10-3 Pa。 |
|
|
关键词：
真空断路器
真空度
微放电
发射电流
测量
|
|
|
Measurement of Internal Pressure of Vacuum Tubes by Micro-discharge Emission Current |
|
|
ZHAO Zi-yu SONG Huan-sheng JIANG Xiu-chen MA Nai-xiang LUO Li-wen WANG Jian-bo LIU Chong-fang |
|
|
Department of Electric Power Engineering, Shanghai Jiaotong University Information Engineering College, Chang'an University Department of Electric Power Engineering, Shanghai Jiaotong University Department of Electric Power Engineering, Shanghai Jiaotong University Department of Electric Power Engineering, Shanghai Jiaotong University Department of Electric Power Engineering, Shanghai Jiaotong University Guangdong Bida Electric Co. LTD |
|
|
Abstract:
The traditional methods for measuring internal pressure of vacuum tubes of breakers are the magnetron and power frequency voltage withstand test. A magnet coil is needed by magnetron and only very bad tubes can be picked out by voltage withstand test. A new method--the ratio of inception voltage Ud of micro-discharge to inception voltage Ue of emission current can be used to measure internal pressure p of vacuum tubes. By this method, internal pressure of vacuum tubes can be measured without using magnetic coil, but with following process: firstly, vacuum gap 0.2~0.3 mm is obtained by forced pulling the closed contacts, secondly, power frequency voltage is applied to the gap and inherent gas adsorption layers are polished by micro-discharge current, finally, the Ud and Ue of the vacuum gap is measured. Theoretical study shows that the bigger Ud/Ue is, the smaller p is. So by measuring the value of Ud/Ue, the value of p can be obtained. The relationships of Ud, Ue, Ud/Ue with p are measured in laboratory, the test results show that the measuring ranges of p can be 100~10-3 Pa by this new method. |
|
|
Keywords:
vacuum breakers
internal pressure
micro-discharge
emission current
measurement
|
|
|
收稿日期 2007-02-08 修回日期 1900-01-01 网络版发布日期 |
|
|
DOI: |
|
|
基金项目:
|
|
|
通讯作者: 赵子玉 |
|
|
作者简介: |
|
作者Email: zhaoziyu@sjtu.edu.cn;zhao-zi-yu@163.com |
|
|
| 参考文献： |
|
| 本刊中的类似文章 |
| 1．刘爱民 林莘.断路器操动机构用
圆筒型直线感应电动机控制系统研究
[J]. 中国电机工程学报, 2009,29(27): 112-118 |
|
| Copyright by 中国电机工程学报 |
