期刊
ENERGIES
卷 9, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/en9010010
关键词
wireless power transfer (WPT); topology analysis; power regulation; electric vehicle
资金
- Major State Basic Research Development Program of China (973 Program) [2011CB711202]
- National Natural Science Foundation of China (NSFC) [51576142]
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 similar to 95% efficiency over a 20 cm transfer distance.
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