A Resonant Regulating Rectifier (3R) Operating at 6.78 MHz for a 6W Wireless Charger with 86% Efficiency

📋 论文概要

该论文提出了一种工作于6.78 MHz的谐振调节整流器（3R），用于6W无线充电系统，实现了86%的效率。通过分析谐振条件下电流和电压的动态特性，在连续导通模式（CCM）和断续导通模式（DCM）下优化了整流和调节性能。

💡 主要创新点

• 提出谐振调节整流器（3R）架构，将谐振整流与电压调节功能一体化。
• 利用CCM和DCM两种工作模式实现轻载和重载下的高效功率传输与精确电压调节。
• 基于包络动态分析的等效建模方法，简化了谐振整流器的控制设计。

🏷 关键词

📄 原文摘要

The magnitudes of IRS and VXH follow simple dynamics under a resonant condition. When VXH is low, the resonant current IRS is built up slowly, whereas when VXH is high, the current is decreased or diminished to zero. If we consider the envelope magnitudes only in CCM based on the phasor transformation, the envelope of IRS and VXH behaves like the current and voltage in a buck type switching DC-DC converter with an equivalent inductance of 4LRS [4]. Meanwhile in DCM, IRS is abruptly decreased to zero with the start of off duty so that VOUT is regulated more precisely at light load. Wireless power transfer up to the 5W power level has become a recent trend for mobile phones, which can be classified into two types: inductive type and resonant type. Inductive type usually has higher efficiency but requires short distance and precise alignment between the transmitter and receiver. From the viewpoint

👥 作者与机构

KAIST, Daejeon, Korea, 2Samsung Electronics, Suwon, Korea