摘要
针对引信体外无线供能系统中初、次级线圈被金属介质包裹的耦合结构,为降低金属管中存在的严重涡流损耗,建立了金属介质中涡流损耗的数学模型。通过求解麦克斯韦方程组,推导了涡流损耗的解析表达式。采用ANSYS仿真软件分析、对比磁屏蔽和开槽两方案减少系统涡流损耗的效果。实验与仿真结果表明,通过在初级线圈外包裹坡莫合金薄层可将外围磁路束缚在该薄层内,从而有效减少系统涡流损耗,其效果优于金属管开槽方案。
According to the coupling structure of primary and secondary coil enwrapped by metal dielectric in fuze wireless power supply system,a mathematical model of eddy current loss in metal dielectric is established to decrease the serious eddy current loss in metal tube.The analytical expressions of eddy current loss is deduced by solving Maxwell ＇ s equations.ANSYS simulation software is used to analyze and compare the effects of magnetic shielding method and slotting method to reduce eddy current loss.Experiment and simulation results show that the exterior magnetic field can be bound in the magnetic shielding layer by enwrapping a thin permalloy layer around the primary coil,and the eddy current loss is effectively reduced.This method is better than slotting in the metal tube.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2011年第3期347-351,共5页
Journal of Nanjing University of Science and Technology
关键词
引信
无线供能
电磁耦合
金属介质
涡流损耗
磁屏蔽
fuzes
wireless power supply
electromagnetic coupling
metal dielectric
eddy currents loss
magnetic shields
