摘要
在脉冲大电流直线驱动装置中,电枢和轨道的接触状态会改变电枢起动特性,而电枢起动过程将直接影响整个发射系统的效率和寿命,因此有必要对电枢起始阶段的滑动接触状态进行研究。搭建发射实验平台,通过高速相机观察电枢起动状态,并结合有限元软件ANSYS,对电枢的预紧力、初始接触状态以及电磁压力、电流密度进行仿真分析,研究电枢表面形貌对电枢起动的影响。结论表明:开槽电枢增加了电枢本身的柔顺性,使得预紧力增大,同时由于电流趋肤效应使得电流密度分布更加均匀,从而电磁压力增大,电枢起动变慢,接触电阻变小。实验和仿真结果对于改善电枢起动过程的接触状态,减轻烧蚀具有重要意义。
The armature-rail contact interface affects the characteristics of armature startup in the pulsed high current linear driver.Furthermore,the armature startup has an influence on the system efficiency and lifetime.This paper discusses the effect of armature surface morphology on armature startup.In the experiments,a high-speed camera was set up to observe the armature startup.Combined with the finite element software ANSYS,the pretightening force and contact status were simulated.Besides,the electromagnetic pressure and current density were also obtained by simulation.The results show that groove increased the flexibility of armature and the homogeneity of current distribution was improved by the current skin effect.Owing to the increasing pressure,the groove armature startup was delayed and its contact resistance reduced.The results have important significance to improve contact condition and reduce erosion.
作者
车英东
赵伟康
王志增
田文
孔佑军
袁伟群
严萍
Che Yingdong;Zhao Weikang;Wang Zhizeng;Tian Wen;Kong Youjun;Yuan Weiqun;Yan Ping(University of Chinese Academy of Sciences,Beijing 100190,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Power Electronics and Electric Drive,Chinese Academy of Sciences,Beijing 100190,China)
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2020年第5期108-112,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(51875546,51577178)。
关键词
枢轨接触状态
电枢起动
电枢表面形貌
高速相机
有限元仿真
armature-rail contact state
armature startup
armature surface morphology
high-speed camera
finite element simulation
