Conventional high-power wireless power transfer (WPT) systems that are required to deliver power over a wide operating range suffer from issues like hard switching, poor current sharing, and unwanted cross-coupling issues. This article proposes a new resonant inductor integrated-transformer-based multi-inverter to improve the WPT power rating without compromising performance. Viable modulation schemes of the proposed system are analyzed, and a hybrid modulation scheme is proposed for wide-range power regulation. To further investigate the feasibility of the proposed system, the power transfer capacity, current sharing among multiple inverters, and the soft switching regions are studied. A 14-kW LCC – LCC WPT experimental system with three parallel inverters is built, which achieves 93.5% efficiency, demonstrating the high performance of the proposed system. This article is accompanied by a video demonstrating these experiments.

中文翻译：

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具有宽 ZVS 工作范围的多逆变器大功率无线电力传输系统

传统的高功率无线电力传输 (WPT) 系统需要在较宽的工作范围内提供电力，因此存在硬开关、电流共享差和不需要的交叉耦合问题等问题。本文提出了一种基于集成变压器的新型谐振电感器多逆变器，以在不影响性能的情况下提高 WPT 额定功率。分析了所提出系统的可行调制方案，并提出了一种用于宽范围功率调节的混合调制方案。为了进一步研究所提出系统的可行性，研究了功率传输容量、多个逆变器之间的电流共享以及软开关区域。一个 14 千瓦低成本航空公司 – 建立了具有三个并联逆变器的 LCC WPT 实验系统，效率达到 93.5%，证明了所提系统的高性能。本文附有演示这些实验的视频。