摘要
基于非铁磁性金属管的电磁耦合系统中,由于电磁场趋附效应等原因阻碍磁场穿透金属管而无法实现能量和信息的有效传输,为解决该问题,建立了系统电磁耦合数学模型,推导出管内磁场分布及次级线圈感应电压表达式,利用ANSYS软件对影响初次级耦合的敏感因素,如激励频率、金属管材料,进行了仿真分析,结果表明高电阻率的金属材料及低的激励频率,可增大系统耦合效率,且初级线圈在5 kHz至10 kHz激励频率附近工作时,次级可获得最佳感应电压。实验证明,基于上述结论设计的无线传输系统可满足负载电路对感应电压幅值及信息同步传输的要求。
In the electromagnetic coupling system based on non-ferromagnetic metal tube,effective power and information transmission is difficult because electromagnetic field skin effect and other factors prevent magnetic field from penetrating the metal tube.In order to solve this problem,an electromagnetic coupling mathematic model of the system was established,and the formulas of the magnetic field distribution inside the tube and the inducted voltage of secondary coil were deduced.Multiphysics simulation software ANSYS was used to analyze the sensitive factors influencing primary and secondary coil coupling,such as exciting frequency and metal tube material.Results show that metal material with high resistivity and low exciting frequency can increase system coupling efficiency,and the secondary coil will gain optimum inducted voltage when the primary coil works in the frequency range of 5 kHz to 10 kHz.Experiment results indicate that the wireless transmission system designed based on these conclusions can meet the requirements of load circuits for induced voltage amplitude and information synchronous transmission.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2011年第5期1165-1170,共6页
Chinese Journal of Scientific Instrument
关键词
电磁感应
非铁磁性金属管
无线能量传输
仿真分析
electromagnetic induction
non-ferromagnetic metal tube
wireless power transmission
simulation analysis
