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

Zhenshi Wang, Xuezhe Wei and Haifeng Dai
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Zhenshi Wang: Clean Energy Automotive Engineering Center, Tongji University, No. 4800, Caoan Road, Shanghai 201804, China
Xuezhe Wei: School of Automotive Studies, Tongji University, No. 4800, Caoan Road, Shanghai 201804, China
Haifeng Dai: Clean Energy Automotive Engineering Center, Tongji University, No. 4800, Caoan Road, Shanghai 201804, China

Energies, 2015, vol. 9, issue 1, 1-18

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.

Keywords: wireless power transfer (WPT); topology analysis; power regulation; electric vehicle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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