新型单极电磁开关分断过程动态特性研究  

Research on Dynamic Breaking Characteristics of New Unipolar Electromagnetic Switch

作　　者：林文贵[1] 许志红[1] 

机构地区：[1]福州大学电气工程与自动化学院,福建省福州市350116

出　　处：《中国电机工程学报》2017年第6期1819-1827,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51277031);福建省科技厅重点项目(2014H0002)~~

摘　　要：电磁开关的分断过程是一个集电、磁、热、流体、机械为一体的过程。该文提出一种多物理场协同仿真方法,经过对相关软件的二次开发,建立了不同软件协同仿真系统。通过提取分断过程的耦合参量,将电子控制模块的设计融入电磁开关的三维动态计算中,建立一种快速去磁控制下电磁开关机械动力学模型,获取分断过程触头瞬态三维运动轨迹。仿真和实验结果表明,分断时在线圈两端施加负压可大幅度缩短开释时间,提高触头分断速度。此外,将磁流体动力学及动态网格技术应用到开关电弧的仿真,得到触头打开过程电弧温度场、气流场时空分布,从而实现对智能控制下电磁开关分断过程的整体仿真分析。该研究为改善开关的分断特性,设计高性能智能化开关提供参考。During the breaking course of electromagnetic switch, it involves in several physical fields, such as electricity, magnetism, heat, fluid and mechanics. Based on secondary development of related softwares, a multi-physics collaborative simulation method was proposed and collaborative system was established. With the coupling parameters extracted, the design of the electronic control module has been integrated into three-dimensional （3D） dynamic simulation. Moreover, the 3D transient moving tracks of the movable contact under the control of rapid demagnetization were obtained through mechanical dynamics model in the breaking course. The results of simulations and experiments indicate that the breaking time can be reduced and the breaking speed can be improved significantly with negative DC voltage exerted on both ends of the coil. In addition, magnetohydrodynamics and dynamic mesh technology have been introduced to the simulation for calculating the distribution of arc temperature field and flow field. It realizes the overall analysis of electromagnetic switch during the breaking course, which provides theoretical basis for the improvement of breaking characteristics and ＇the design of high-performance intelligent switches.

关 键 词：电磁开关 协同仿真 动态特性 开关电弧 磁流体动力学 

分 类 号：TM572[电气工程—电器]