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Energies 2016, 9(1), 10; doi:10.3390/en9010010

Design and Control of a 3 kW Wireless Power Transfer System for Electric Vehicles

1
Clean Energy Automotive Engineering Center, Tongji University, No. 4800, Caoan Road, Shanghai 201804, China
2
School of Automotive Studies, Tongji University, No. 4800, Caoan Road, Shanghai 201804, China
*
Author to whom correspondence should be addressed.
Academic Editor: K. T. Chau
Received: 13 November 2015 / Revised: 15 December 2015 / Accepted: 17 December 2015 / Published: 24 December 2015

Abstract

This paper aims to study a 3 kW wireless power transfer system for electric vehicles. First, the LCL-LCL topology and LC-LC series topology are analyzed, and their transfer efficiencies under the same transfer power are compared. The LC-LC series topology is validated to be more efficient than the LCL-LCL topology and thus is more suitable for the system design. Then a novel q-Zsource-based online power regulation method which employs a unique impedance network (two pairs of inductors and capacitors) to couple the cascaded H Bridge to the power source is proposed. By controlling the shoot-through state of the H Bridge, the charging current can be adjusted, and hence, transfer power. Finally, a prototype is implemented, which can transfer 3 kW wirelessly with ~95% efficiency over a 20 cm transfer distance. View Full-Text
Keywords: wireless power transfer (WPT); topology analysis; power regulation; electric vehicle wireless power transfer (WPT); topology analysis; power regulation; electric vehicle
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, Z.; Wei, X.; Dai, H. Design and Control of a 3 kW Wireless Power Transfer System for Electric Vehicles. Energies 2016, 9, 10.

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