A 1MHz Oak Ridge AC / DC Converter for UAV Contactless Charger Implementation

2022 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2022-03-20 DOI:10.1109/APEC43599.2022.9773397

Erdem Asa, Lincoln Xue, Mostak Mohammad, V. Galigekere, O. Onar, B. Ozpineci

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Abstract

In this paper, a 1 MHz single-phase Oak Ridge Converter (ORC) AC/DC wireless power transfer (WPT) system is introduced for unmanned air vehicle (UAV) charging applications. The proposed advanced solution eliminates the design, weight, volume, and the cost of the power factor correcting (PFC) front-end rectifier compared to the conventional practices. Additionally, grid power quality requirements can be achieved with the presented innovative idea. With this method, single stage WPT primary side uses the hybrid grid frequency and high frequency (60 Hz and 1 MHZ) from ac source through the coupler coils and to UAV battery with GaN FETs. Experimental results of the single-phase system is presented to confirm the mathematical analyses with the source voltage of 110 VAC, RMS and output voltage of 40 VDC at 1 kW power with 6 inches air gap between couplers. The primary coupler consists of a ferrite-backed single-turn coil with a radius of 1.5 ft, and the secondary coupler is made with an air-core single-turn coil with radius of 1.2 ft. The system overall ac to dc efficiency is measured 77 % acquiring 0.99 power factor (PF) and 3.3 % current total harmonic distortion (THD) at 1 kW power.

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用于无人机非接触式充电器的1MHz Oak Ridge AC / DC转换器实现

本文介绍了一种用于无人机充电的1 MHz单相橡树岭转换器(ORC)交/直流无线电力传输(WPT)系统。与传统做法相比，提出的先进解决方案消除了功率因数校正(PFC)前端整流器的设计、重量、体积和成本。此外，所提出的创新思想可以满足电网电能质量的要求。通过这种方法，单级WPT初级侧使用混合电网频率和高频(60 Hz和1 MHZ)，从交流源通过耦合器线圈和具有GaN场效应管的无人机电池。给出了电源电压为110 VAC，均方根值，输出电压为40 VDC，功率为1kw，耦合器间气隙为6英寸的单相系统的实验结果来验证数学分析。主耦合器由半径为1.5英尺的铁氧体背侧单匝线圈组成，副耦合器由半径为1.2英尺的空芯单匝线圈组成。在1 kW功率下，系统整体交直流效率测量为77%，功率因数(PF)为0.99，电流总谐波失真(THD)为3.3%。

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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2022 IEEE Applied Power Electronics Conference and Exposition (APEC)

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