摘要
针对无线传能系统宽频段电场辐射屏蔽的需求,建立了采用主动屏蔽方式的无线传能系统屏蔽效能分析电路模型。推导出主动屏蔽激励源可由无线传能系统电压激励源控制。给出了空间点位置和面位置屏蔽效能计算公式,通过对激励电压源进行傅里叶变换后提取关注频段电压分量可实现对宽频段屏蔽效能的分析。通过仿真分析证明了方法的有效性,屏蔽效能与空间位置有关,同时受限于传输效率的约束。通过调节压控电压源的压控系数可以在传输效率损失相对较小的情况下实现关注位置电场辐射的有效屏蔽。最后通过实验验证了无线传能系统主动屏蔽方式屏蔽效能分析方法的正确性和工程可应用性。
In order to meet the shielding requirement of broadband electric field radiation,a circuit model of shielding effectiveness analysis for wireless power transmission system with active shielding is established.It is derived that the active shielding excitation source can be controlled by the voltage excitation source of wireless power transmission system.The formulas for calculating the shielding effectiveness of space point position and surface position are given.The analysis of the broadband shielding effectiveness can be realized by extracting the voltage components of the concerned frequency bands after Fourier transform of the excitation voltage source.The effectiveness of the method is proved by simulation analysis.The shielding effectiveness is related to the spatial location and limited by the transmission efficiency.By adjusting the voltage control coefficient of the voltage-controlled voltage source,the effective shielding of the electric field radiation at the position can be realized under the condition of relatively small transmission efficiency loss.Finally,the correctness and engineering applicability of the analysis method of active shielding effectiveness of wireless power transmission system are verified by an experiment.
作者
张玉廷
王振兴
董亚凯
刘治钢
ZHANG Yu-ting;WANG Zhen-xing;DONG Ya-kai;LIU Zhi-gang(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;Beijing Engineering Research Center of EMC and Antenna Test Technology,Beijing 100094,China)
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2021年第5期669-676,共8页
Journal of Astronautics
关键词
卫星
电磁兼容性
无线传能
电场辐射
屏蔽效能
Satellite
Electromagnetic compatibility
Wireless power transmission
Electric field radiation
Shielding effectiveness
