期刊
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
卷 4, 期 2, 页码 364-375出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TTE.2018.2808698
关键词
Constant current (CC); constant voltage (CV); load-independent; three-coil wireless power transfer (WPT) system
资金
- National Key Research and Development Program of China [2017YFB1201002]
- Hong Kong Research Grant Council [PolyU 252040/17E]
- Hong Kong Polytechnic University [1-ZE7J]
- National Science Fund for Distinguished Young Scholars [51525702]
The design of operating frequencies and compensation topologies for load-independent output current or output voltage in two-coil wireless power transfer (WPT) system has been widely studied. The three-coil WPT system has been proven to be more efficient and shows a better performance compared to the two-coil WPT system with an increasing transmission distance. However, the research on load-independent output voltage or output current of the three-coil WPT system is still at pilot stage. This paper systematically investigates the loadin-dependent output voltage and output current characteristics of a three-coil WPT system to achieve a constant output voltage (CV) and constant output current (CC) with near zero reactive power, which can simplify the control. The CV and CC characteristics are achieved by well-designed passive parameters of the receiver side compensation. Additionally, a hybrid receiver side compensation with two additional switches for the three-coil WPT system is developed to charge the electric vehicle battery by combining the CC and CV characteristics. Finally, a scaled-down experimental setup with 4-A charging current and 96-V cell voltage is constructed to verify the proposed approach. The experimental results agree well with the theoretical analysis.
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