In this article, we propose a near field analytical model of an electromagnetic interference reduction method using an n th harmonic frequency shielding coil with efficiency enhancement in a loosely coupled automotive wireless power transfer system. In general, in the loosely coupled automotive wireless power transfer system, the power transfer efficiency is relatively lower than a tightly coupled wireless power transfer system due to the low coupling. In addition, the electromagnetic interference at the n th harmonic frequency from the power source can interfere with nearby electronic devices. To reduce electromagnetic interference level and enhance efficiency, we proposed a shielding coil between a transmitter and a receiver coil. By using a near field analytical model of the magnetic field intensity and efficiency equations, we analyze based on the equations and obtain a proper value of the resonant frequency of the shielding coil. Therefore, we can achieve low levels of electromagnetic interference at the specific n th harmonic frequency and higher value of the power transfer efficiency in the loosely coupled automotive wireless power transfer system.

中文翻译：

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用于降低 EMI 和提高效率的近场分析模型 n松耦合汽车 WPT 系统中的谐波频率屏蔽线圈

在本文中，我们提出了一种使用电磁干扰减少方法的近场分析模型。 n 松耦合汽车无线电力传输系统中具有效率增强的 th 谐波频率屏蔽线圈。一般而言，在松耦合的汽车无线电力传输系统中，由于低耦合，电力传输效率比紧耦合的无线电力传输系统低。此外，电磁干扰n 来自电源的谐波频率会干扰附近的电子设备。为了降低电磁干扰水平并提高效率，我们在发射器和接收器线圈之间提出了一个屏蔽线圈。通过使用磁场强度和效率方程的近场解析模型，我们根据方程进行分析，得到屏蔽线圈谐振频率的合适值。因此，我们可以在特定位置实现低水平的电磁干扰n 松耦合汽车无线电力传输系统中的谐波频率和更高的功率传输效率值。