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国家自然科学基金(50707022)

作品数:4 被引量:51H指数:1
相关作者:岳长喜贾申利史宗谦王立军朱天胜更多>>
相关机构:西安交通大学更多>>
发文基金:国家自然科学基金国家教育部博士点基金更多>>
相关领域:电气工程更多>>

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Investigation of Vacuum Arc Voltage Characteristics Under Different Axial Magnetic Field Profiles被引量:1
2010年
Characteristics of the arc voltage under different profiles of axial magnetic field were investigated experimentally in a detachable vacuum chamber with five pairs of specially designed electrodes generating both bell-shaped and saddle-shaped magnetic field profile. The arc column and cathode spot images were photographed by a high speed digital camera. The dependence of the arc voltage on arcing evolution is analyzed. It is indicated that the axial magnetic field profile could affect the arc behaviors significantly, and the arc voltage is closely related to the arc light intensity.
贾申利宋晓川霍新陶史宗谦王立军
Simulation of Vacuum Arc Characteristics Under Four Kinds of Axial Magnetic Fields and Comparison with Experimental Results被引量:1
2011年
Based on a two-dimensional axisymmetric magnetohydrodynamic (MHD) model, the vacuum arc characteristics under four kinds of axial magnetic fields (AMFs) are analyzed, which include a bell-shaped AMF generated by a pair of commercial cup-shaped electrodes, and three kinds of saddle-shaped ones generated by three pairs of newly designed electrodes. The simulation result indicates that the effect of AMF on the vacuum arc characteristics is significant. A comparison between the simulation result and experimental one shows that the distribution of the simulated ion density integrated along the viewing path is in agreement with the image of the arc column. Both the simulation result and the experimental one show that, among the four kinds of AMFs, the saddle-shaped one with the highest strength is the best, which could resist the constriction of the vacuum arc more efficiently, while the saddle-shaped one with the lowest strength and the bell-shaped one are the least desirable.
张玲贾申利王立军史宗谦
关键词:AMFMHDSIMULATION
Experimental Investigation on the Inf1uence of Axial Magnetic Field Distribution on Resisting the Constriction of a High-Current Vacuum Arc
2009年
Effect of the axial magnetic field (AMF) on resisting the constriction of a highcurrent vacuum arc is studied in this paper. Two typical AMF distributions were investigated, i.e., the traditional bell-shaped AMF, and the saddle-shaped AMF. Experiments were conducted in a detachable vacuum chamber with arms arc current in the range of 10 kA to 25 kA. The arc column was photographed by a high-speed digital camera with an exposure time of 2 microseconds. The constriction of the vacuum arc was compared by processing the images of the arc column under the two different field configurations and numerically determining the dimensions of the arc column near the electrodes. It was also confirmed that the AMF distribution had a significant influence on its effectiveness in resisting arc constriction. of the arc is more influential than that at the Furthermore, the AMF strength near the periphery centre of the electrodes in resisting arc constriction.
史宗谦刘志刚贾申利宋晓川王立军
真空直流断路器高速操动机构的研究被引量:49
2010年
针对舰船直流系统短路电流大、短路时间常数小的特点,对基于人工过零原理的真空直流断路器的高速操动机构进行了仿真和实验研究。该高速操动机构利用涡流效应产生电磁斥力,推动运动部件实现高速动作。笔者建立了电磁斥力机构的三维有限元模型,对其动态过程进行了仿真分析;根据仿真设计的结构参数制作了实验样机,实验样机的线圈电流波形以及机械运动特性的测试结果与仿真结果较为吻合。
史宗谦贾申利朱天胜王立军岳长喜
关键词:直流系统电磁斥力机构有限元
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