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author:

Rong, Chao (Rong, Chao.) [1] | Zhang, Bo (Zhang, Bo.) [2] | Jiang, Yanwei (Jiang, Yanwei.) [3] (Scholars:江彦伟) | Zhou, Jiali (Zhou, Jiali.) [4]

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EI

Abstract:

This paper proposes a distance-independent wireless charging system that achieves constant current (CC) and constant voltage (CV) output through utilization of a reconfigurable topology, capable of seamlessly switching between a two-coil and a three-coil configuration. In order to enhance output adjustability and improve the efficiency of the charging process, this system combines the advantages of fractional-order and integer-order resonant circuits. In the two-coil configuration, the output of the inverter on the transmitter side is modulated as that of a fractional-order capacitor. By analyzing frequency characteristics of the fractional-order circuit, a control strategy of variable fractional order is introduced to achieve CC output against variations of transfer distance based on a mutual inductance recognition method. After transitioning to the three-coil configuration, the system inherently achieves a CV output by operating the inverter at a fixed frequency and forming an integer-order resonant circuit. In addition, in both mentioned configurations, the full-bridge (FB) mode and half-bridge (HB) mode of the inverter are utilized to minimize switching losses and broaden the range of soft-switching operation, catering to various load conditions. Finally, an experimental prototype is built to achieve CC and CV output within a wide charging range. © 2024 IEEE.

Keyword:

Electric inverters Energy transfer Inductance Inductive power transmission Power electronics Resonant circuits Topology

Community:

  • [ 1 ] [Rong, Chao]South China University of Technology, School of Electric Power, Guangzhou; 510641, China
  • [ 2 ] [Zhang, Bo]South China University of Technology, School of Electric Power, Guangzhou; 510641, China
  • [ 3 ] [Jiang, Yanwei]Fuzhou University, College of Electrical Engineering and Automation, Fuzhou; 350108, China
  • [ 4 ] [Zhou, Jiali]HKU Shenzhen Institute of Research and Inovation, Shenzhen; 518057, China
  • [ 5 ] [Zhou, Jiali]The University of Hong Kong, The Department of Electrical and Electronic Engineering, Hong Kong

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Year: 2024

Page: 821-824

Language: English

Cited Count:

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 1

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