Irreversible demagnetization mechanism of permanent magnets during electromagnetic buffering

作     者：Zi-xuan Li Guo-lai Yang Yu-meng Fan Jia-hao Li Zi-xuan Li;Guo-lai Yang;Yu-meng Fan;Jia-hao Li

作者机构：School of Mechanical EngineeringNanjing University of Science and TechnologyNanjingPR China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2021年第17卷第3期

页      面：763-774页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0826[工学-兵器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：primarily supported by the National Natural Science Foundation of China(grant number 301070603) 

主　　题：EMB Irreversibly demagnetization Magnetic Reynolds number Correction coefficient 

摘      要：The permanent magnets will be irreversibly demagnetized under high temperature and high velocity during the electromagnetic *** this study,the magnetic field induced by eddy currents and the self-demagnetizing field of permanent magnet are taken into consideration together for demagnetization *** magnetic Reynolds number is used to express the eddy currents *** correction coefficient being expressed as the index of the air-gap width,the inner cylinder thickness,iron pole axial length and the permanent magnet demagnetization coefficient is introduced by magnetic path analysis to represent the self-demagnetization effect and the demagnetization *** electromagnetic buffer(EMB)prototype is tested under intensive impact loads of different strengths at room *** accuracy of the nonlinear irreversible demagnetization finite element model is verified by demagnetization on damping force,velocity and ***,high-velocity demagnetization and high-temperature demagnetization are analysed in order to obtain the distribution law of irreversible demagnetization.