Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/79204
Title: Analysis and design of load-independent output current or output voltage of a three-coil wireless power transfer system
Authors: Li, Y 
Xu, QD
Lin, TR
Hu, JF 
He, ZY
Mai, RK
Keywords: Constant current (CC)
Constant voltage (CV)
Load-independent
Three-coil wireless power transfer (WPT) system
Issue Date: 2018
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on transportation electrification, June 2018, v. 4, no. 2, p. 364-375 How to cite?
Journal: IEEE transactions on transportation electrification 
Abstract: 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.
URI: http://hdl.handle.net/10397/79204
EISSN: 2332-7782
DOI: 10.1109/TTE.2018.2808698
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