Reduction of Electromagnetic Emissions Generated by Inductive Resonant WPT Systems Using Multi-Switching-Frequency-Based Method

2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON) Pub Date : 2020-11-05 DOI:10.1109/RTUCON51174.2020.9316570

D. Stepins, Lalithambica Akunuri, A. Subbarao, J. Zakis

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引用次数: 2

Abstract

Being switch-mode in nature, wireless power transfer systems (WPT) emit significant conducted electromagnetic emissions (EME). In this paper for the first time multi switching frequency scheme is applied to closed-loop WPT systems for reduction of conducted EME. In this method inductive resonant WPT system operates at different discrete switching frequencies sequentially. The effect of the multi switching frequency scheme on main performance characteristics of inductive-resonant wireless battery charger operating in constant current mode is analyzed by using simulations. Performance characteristics of the WPT system with the multi switching frequency scheme are compared with that of WPT system without modulations and with classical switching frequency modulation. It is shown that wireless battery charger with the multi switching frequency scheme exhibits performance similar to performance of wireless battery charger with classical switching frequency modulation but complexity of control is lower.

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利用基于多开关频率的方法降低感应谐振WPT系统产生的电磁发射

无线电力传输系统(WPT)本质上是开关模式的，它会发射出大量的传导电磁发射(EME)。本文首次将多开关频率方案应用于闭环WPT系统中，以降低传导电磁干扰。在该方法中，感应谐振WPT系统在不同的离散开关频率下依次工作。通过仿真分析了多开关频率方案对恒流模式下感应谐振无线电池充电器主要性能特性的影响。比较了采用多开关频率方案的WPT系统与无调制和经典开关频率调制的WPT系统的性能特点。结果表明，多开关频率方案的无线电池充电器性能与经典开关调频方案的无线电池充电器性能相当，但控制复杂度较低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)

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