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http://dx.doi.org/10.1007/s43236-021-00227-7

Single stage AC-DC converter for wireless power transfer operating within wide voltage control range  

Kim, Min-Ji (Department of Electrical and Electronics Engineering, Jeonju University)
Woo, Jeong-Won (Department of Electrical and Electronics Engineering, Jeonju University)
Kim, Eun-Soo (Department of Electrical and Electronics Engineering, Jeonju University)
Publication Information
Journal of Power Electronics / v.21, no.5, 2021 , pp. 768-781 More about this Journal
Abstract
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 VDC) 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 (THDi) 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.
Keywords
Wireless power transfer (WPT); AC-DC converter; Single stage converter; SS compensation circuit;
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