电工技术学报  2015, Vol. 30 Issue (9): 39-45    DOI:
电力电子及电力传动 |
中频电流开断实验的外施纵向磁场励磁系统
蒋原, 武建文, 唐伟
北京航空航天大学自动化科学与电气工程学院 北京 100191
External Axial Magnetic Field Excitation System in Intermediate-frequency Current Interruption Experiment
Jiang Yuan, Wu Jianwen, Tang Wei
School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China
全文: PDF (2078 KB)  
输出: BibTeX | EndNote (RIS)      
摘要 设计一种应用于中频真空电弧实验的外施纵向磁场励磁系统。该系统由中频电流互感器感应主回路电流,产生二次电流为亥姆霍兹线圈励磁,从而在线圈轴线中心处产生与主电流同相位的纵向磁场,模拟纵向磁场线圈触头产生的磁场,且磁场通过变比可调。首先从理论出发,建立亥姆霍兹线圈轴线中心处磁感应强度与二次电流的关系,详细介绍系统重要参数的设计过程。其次针对电流互感器铁心磁导率高且漏感小的特点,简化其等效电路,并经计算证明实验电流为最大时电流互感器的铁心未饱和,一次电流与二次电流的相位差满足设计要求。最后对励磁系统性能进行测试实验,在交流实验中,假设了回路电流的数学模型并根据实验数据求解磁感应强度,B/I值计算结果与理论值一致,验证了设计方法的有效性和实用性。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
蒋原
武建文
唐伟
关键词 中频电流 外施纵向磁场 亥姆霍兹线圈 电流互感器    
Abstract:An external axial magnetic field (AMF) excitation system applied in the intermediate-frequency current interruption experiment is designed.In the system,an intermediate-frequency current transformer (CT) is designed to induct the current in the main circuit and the secondary current is used to excite the Helmholtz coil.So that the AMF which is synchronous with the primary current and regulated by the transformation ratio is generated in axes center of the Helmholtz coil.In this way,the axial magnetic field generated by the contact coil in the current breaker can be simulated.Firstly,the relationship between the inducted magnetic intensity in the axes center of the Helmholtz coil and secondary current is theoretically established.And the designing process for the essential parameters is introduced in detail.Secondly,the equivalent circuit is simplified based on the high magnetic permeability and low leakage inductance of CT.It is proved by calculation that the iron core would not reach saturation when the current root mean square (RMS) value in the circuit is maximal.The phase-difference between the primary current and the secondary current is also verified to be in a reasonable range.Finally,the experiment is implemented to test the excitation system.The magnetic induction intensity is calculated according to the supposed mathematic model of the circuit and the experimental data in the AC experiment.The calculation result of B/I turns out to be consistent with that of the theoretical value,which verifies the effectiveness of this excitation system.
Key wordsIntermediate-frequency current    external axial magnetic field    Helmholtz coil    current transformer   
收稿日期: 2014-12-03      出版日期: 2015-05-22
PACS: TM561  
基金资助:国家自然科学基金(51377007),高等学校博士学科点专项科研基金(20131102130006)和中央高校基本科研业务费专项资金资助项目。
通讯作者: 蒋原 男,1985年生,博士研究生,研究方向为真空电弧理论及电器控制。   
作者简介: 蒋原 男,1985年生,博士研究生,研究方向为真空电弧理论及电器控制。武建文 男,1963年生,博士,教授,博士生导师,研究方向为开关电弧理论及应用、电器及智能控制、配电自动化及电能质量控制。
引用本文:   
蒋原, 武建文, 唐伟. 中频电流开断实验的外施纵向磁场励磁系统[J]. 电工技术学报, 2015, 30(9): 39-45. Jiang Yuan, Wu Jianwen, Tang Wei. External Axial Magnetic Field Excitation System in Intermediate-frequency Current Interruption Experiment. Transactions of China Electrotechnical Society, 2015, 30(9): 39-45.
链接本文:  
https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I9/39