期刊
ENERGIES
卷 11, 期 1, 页码 -出版社
MDPI AG
DOI: 10.3390/en11010045
关键词
wireless power transfer; three-phase inverter; dynamic charging
资金
- National Key R&D Program of China [2017YFB1201002]
- National Natural Science Foundation of China [51677155]
- Sichuan Youth Science & Technology Foundation [2016JQ0033]
- Fundamental Research Funds for the Central Universities [2682017QY01]
A dynamic wireless power transfer (WPT) system is an effective method, which can reduce charging time and extend the driving range of the electric vehicles. In the dynamic WPT systems, the output voltage may fluctuate when the receiver moves along the transmitter coils. This paper proposes a three-phase dynamic WPT charging system with overlapped three-phase transmitter coils. The overlap length is optimized to depress the fluctuation of the output voltage. These coils are powered by a three-phase inverter to generate an even magnetic field, and a unipolar coil is employed as a receiver to simplify the coil structure of the secondary side. Based on the proposed three-phase coil structure, the output voltage characteristics of the system are analyzed in detail. A 500 W dynamic charging prototype is established to validate the proposed dynamic charging system. Experimental results show that the output voltage fluctuation is within +/- 3.05%. The maximum system efficiency reaches 89.94%.
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