摘要
针对目前研究中忽略接收线圈对发射线圈影响从而导致较大误差的问题,建立了谐振耦合线圈LS和LD的数学模型,给出了系统的传输效率和输出功率与线圈尺寸、距离等的关系,通过对比分析得出在考虑接收线圈影响的情况下可使误差从32%下降到3%。针对系统满足效率最大时往往功率较低的缺点,利用功效积的概念对系统进行了优化,使系统传输效率为50.6%时输出功率为2.3 W,两者均较高。最后,通过MATLAB仿真验证了结论的正确性以及功效积的可行性。
Aiming at the present study ignores the received coil＇s influence on the transmitter coil which can lead to big error problem, this paper establishes the mathematical model of receiving and resonance coupling coils Ls and LD, and gives the relation- ship of transmission efficiency and power and coil sizes, distance. Through the contrast analysis ,under the condition of considering the effects of receiver coil, the error decreases from 32% to 3%. Amied at the shortcoming of the system＇s power is low when the efficiency is biggest, using the concept of power efficiency index, the system is optimized. So that the system transmission effi- ciency is 50.6% when the output power is 2.3 W, both are high. Finally, the correctness of the conclusion and the feasibility of the power efficiency index are verified by MATLAB simulation.
出处
《电子技术应用》
北大核心
2015年第6期132-135,共4页
Application of Electronic Technique
基金
河北省自然科学基金资助项目(F2014209192)
河北省教育厅重点资助项目(ZD20131011)
华北理工大学杰出青年基金资助项目(JP201301)
关键词
谐振耦合
输出功率
效率
功效积
resonance coupling
output power
efficiency
power efficiency index
