摘要
为探索磁耦合共振无线能量传输机理,研究传输参数与传输性能间的关系,基于互感耦合理论,建立了磁耦合共振无线能量传输系统的电路模型,推导出系统共振角频率解析表达式,揭示了共振角频率随收发端距离由近至远过程中,由一个分裂至两个又恢复至一个的规律;指出因空心线圈的低耦合系数特性,工程中仅会观察到由两个合并为一个的过程。利用Or-CAD仿真软件和实验手段对系统传输特性进行仿真分析和实验研究,结果显示系统传输特性的变化规律与理论分析相吻合,所求得的共振角频率数学公式的计算精度高,与仿真结果误差在±1%以内,能够准确描述系统的能量传输特性。所建模型为高效率磁耦合共振无线能量传输系统的设计提供了理论支持。
In order to explore the transmission mechanism ot wireless power transmission systcn, r,a.cu t,,, ,.a~,l^Ll,~ coupling resonance and study the relationship between transmission parameters and transmission performance, the cir- cuit model of wireless power transmission system with magnetic coupling resonance was established based on mutual inductance coupling theory. The analytical expression of system resonant angular frequency is derived, and the law that the resonant angular frequency splits from one to two, then recovers to one again in the process that the distance between the sending and receiving devices changes from near to far is revealed, However, only the frequency merging process can be observed because of the low coupling coefficient characteristic of the air-core coils. Orcad simulation software and experiment means were used to carry out the simulation analysis and experimental study on the transmis- sion characteristics of the system. The results show that the variation law of the transmission characteristics is consist- ent with that of theoretical analysis, and the mathematical formulas of the obtained resonant angular frequency have high calculation accuracy and the calculation error is within -＋ 1% of the simulation result error. Therefore the pro- posed circuit model is able to accurately describe the power transmission characteristics of the system, and it also pro- vide a theoretical support for the design of high efficient wireless power transmission system based on magnetic cou- pling resonance.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2012年第12期2735-2741,共7页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(60908037)资助项目
关键词
磁耦合共振
无线能量传输
电路模型
共振频率
magnetic coupling resonance
wireless power transmission
circuit model
resonance frequency
