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

Energies

Zhenshi Wang¹  Xuezhe Wei²  Haifeng Dai¹ 

[1] Clean Energy Automotive Engineering Center, Tongji University, No. 4800, Caoan Road, Shanghai 201804, China;School of Automotive Studies, Tongji University, No. 4800, Caoan Road, Shanghai 201804, China;

关键词: wireless power transfer (WPT);    topology analysis;    power regulation;    electric vehicle;   

DOI  :  10.3390/en9010010

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.