The foundation and analysis of polarized magnetic system’s unified mathematical model in aerospace electromagnetic relay

作     者：梁慧敏 叶雪荣 翟国富 郝燕玲 刘茂恺 

作者机构：College of Automation Harbin Engineering University School of Electrical Engineering and Automation Harbin Institute of Technology 

出 版 物：《Journal of Harbin Institute of Technology(New Series)》 (哈尔滨工业大学学报（英文版）)

年 卷 期：2007年第14卷第4期

页      面：561-565页

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：Sponsored by Postdoctoral Fund of Heilongjiang Province (Grant NoLRB05 -002) 

主　　题：aerospace relay polarized magnetic system unified mathematical model attractive torque 

摘      要：Polarized magnetic system has a series of features, such as small volume, light weight, low power consumption, high sensitivity, quick movement and so on, widely used in the products of the military aerospace electromagnetic relay. The typical polarized magnetic system has mainly four structures and its simplified equivalent magnetic circuits model is the base of the design of the electromagnetic relay with permanent magnet. In the past, the analysis method that people used was difficult to build the unified mathematical models, which divided the work gap magnetic flux into permanent magnet flux and electromagnetic flux. Based on the analysis method of the work gap magnetic voltage, this paper founds the unified mathematical model of the polarized magnetic system and divides the attractive torque into permanent magnet torque, polarized torque and electromagnetic torque through the energy balance formula. It analyses the influence of permanent magnet sizes on permanent magnet torque, polarized torque and electromagnetic torque through the energy balance formula and the conclusions can direct the design of aerospace electromagnetic relay with permanent magnet.