Abstract

In order to increase the energy transmission density between the coupled coils in the wireless power transmission (WPT) system, this paper propose the push–pull magnetic field excitation. A push–pull (PP) system that can enhance the energy transmission density is proposed by using the superimposed field effect of two transmitting coils from two different directions on the receiving coil in this paper. Firstly, the power and efficiency formulas of the system transmission are theoretically deduced. Then, the PP system is designed and constructed. The analysis shows that the transmission power will change with various superposition effects of electromagnetic waves. After, we use MAXWELL simulation software to simulate the magnetic field intensity distribution of the PP system, and set up a 100 W PP system experimental platform. Comparing the same direction and reverse direction of the PP system with the system performance parameters of the traditional WPT system, the effects of different resonant circumstances of two transmitters on the energy transmission density of the system are discussed. Experimental results show that the power capacity of the PP–WPT system is 55.5% higher than that of the conventional WPT system. It provides new ideas for the research and application of subsequent WPT.

摘要

为了增加无线电力传输（WPT）系统中耦合线圈之间的能量传输密度，本文提出了推挽磁场激励。本文利用来自两个不同方向的两个发射线圈在接收线圈上的叠加场效应，提出了一种可以提高能量传输密度的推挽（PP）系统。首先，从理论上推导出系统传输的功率和效率公式。然后，设计并构建了PP系统。分析表明，发射功率会随着电磁波的各种叠加效应而变化。之后，我们使用MAXWELL仿真软件模拟PP系统的磁场强度分布，搭建了100W的PP系统实验平台。将PP系统的同向和反向与传统WPT系统的系统性能参数进行比较，讨论了两个发射机不同谐振情况对系统能量传输密度的影响。实验结果表明，PP-WPT 系统的功率容量比传统的 WPT 系统高 55.5%。为后续WPT的研究和应用提供了新的思路。