A 50W 98%-Efficiency High-Power Wireless-Charging System with an Acoustic Noise-Reduced ASK Modulation Technique and Internal Hybrid Voltage-/Current-Mode ASK Demodulation

📋 论文概要

该论文提出了一种50W、效率高达98%的高功率无线充电系统，采用声学噪声降低的ASK调制技术，解决了传统高功率无线充电中通信可靠性与噪声问题。该系统基于Qi标准MPP协议，支持超过25W的无线充电。

💡 主要创新点

• 提出了一种声学噪声降低的ASK调制技术，有效抑制了高功率无线充电过程中的可听噪声。
• 实现了50W高功率无线充电且效率达到98%，显著提升了功率传输能力与能量转换效率。

🏷 关键词

📄 原文摘要

mobile devices. The well-known and widely used Qi wireless power transfer (WPT) standard has been extended to version 2.0, now incorporating the magnetic power profile (MPP) standard in addition to the baseline power profile (BPP) and extended power profile (EPP). Figure 9.8.1 illustrates the communication between TRX, the trends in Qi wireless charging, and the basic concepts of amplitude shift keying (ASK) and frequency shift keying (FSK). The Qi standard is now expected to support high-power wireless charging exceeding 25W, which requires frequent and accurate TRX communication to ensure safety and maintain high signal quality. ASK modulation is used for RX to TX communication, with external modulation capacitors

👥 作者与机构

Seongjin Oh, Hansol Kim, Hyunsu Kim, Gyeongho Namgoong, Woojin Park,

Sangbeom Heo, Jaekyu Kim, Sungwoo Moon, Hyoung-Seok Oh, Hwayeal Yu Samsung Electronics, Hwaseong, Korea The near-field wireless charging system has become widely commercialized in