⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种基于GaN的Class-E无线功率传输系统，实现了70W输出功率和90%效率。通过自动匹配点搜索控制，实现了零电压开关，解决了高功率高效率WPT系统中的匹配和效率问题。
High-power (>50W) and high-efficiency (>90%) wireless-power-transfer (WPT) systems are becoming in demand for portable electronic applications. In Fig. 8.2.1, power efficiency and/or output power specifications in prior-art designs are much below the expected requirements [1-5]. Frequency tuning in [1,2] is simple, but the switching frequency (fSW) deviates from 6.78MHz. Capacitor tuning [3,5] is the most intuitive approach, but the capacitor matrix occupies a large area, and the dynamically tuned compensation capacitor bank is limited by the digital-control resolution and compensation accuracy. In addition, the duty-cycle control in [4] leads to an unregulated output voltage at the RX side. Existing impedance-matching techniques for reducing power loss are not applicable to
Che-Hao Yeh1, Yen-Ting Lin1, Chun-Chieh Kuo1, Chao-Jen Huang1,
Cheng-Yu Xie1, Shen-Fu Lu1, Wen-Hau Yang1, Ke-Horng Chen1, Kuo-Chi Liu1, Ying-Hsi Lin2 National Chiao Tung University, Hsinchu, Taiwan Realtek Semiconductor, Hsinchu, Taiwan 1