In the field of e-mobility and automated guided vehicles, studies on a wireless power transfer (WPT) charging system have been conducted recently owing to its convenience, reliability, and positive environmental impact due to the elimination of cords. In this paper, a wireless power transfer charging system using a single-stage AC–DC converter is proposed that can be reduced in size and weight to ensure convenience. The proposed single-stage AC–DC converter can control a wide output voltage (36–54 V_DC) within the coupling ranges due to the variable link voltage applied to a WPT resonant circuit through phase-shifted modulation at a fixed switching frequency. In addition, the input power factor (PF) and the total harmonic distortion (THD_i) can be improved through the use of the proposed converter. A 1-kW prototype with a 50-mm air gap was fabricated and its effectiveness was validated based on analysis and experimental results.

在电动汽车和自动导引车领域，由于其便利性，可靠性以及由于消除了线缆而对环境产生的积极影响，最近对无线功率传输（WPT）充电系统进行了研究。在本文中，提出了一种使用单级AC-DC转换器的无线电力传输充电系统，该系统可以减小尺寸和重量，以确保便利性。由于以固定的开关频率通过相移调制将可变的链路电压施加到WPT谐振电路，因此，所提出的单级AC-DC转换器可以在耦合范围内控制较宽的输出电压（36-54 V _DC）。此外，输入功率因数（PF）和总谐波失真（THD _i）可以通过使用建议的转换器进行改进。制造了一个具有50mm气隙的1kW原型，并根据分析和实验结果验证了其有效性。