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Energies 2018, 11(2), 307; doi:10.3390/en11020307

A New ZVS Tuning Method for Double-Sided LCC Compensated Wireless Power Transfer System

Faculty of Electric Power Engineering, Kunming University of Science of Technology, Kunming 650500, China
Author to whom correspondence should be addressed.
Received: 31 December 2017 / Revised: 19 January 2018 / Accepted: 22 January 2018 / Published: 1 February 2018
(This article belongs to the Special Issue Wireless Power Transfer and Energy Harvesting Technologies)
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This paper presents a new zero voltage switching (ZVS) tuning method for the double-sided inductor/capacitor/capacitor (LCC) compensated wireless power transfer (WPT) system. An additional capacitor is added in the secondary side of the double-sided LCC compensation network in order to tune the network to realize ZVS operation for the primary-side switches. With the proposed tuning method, the turn off current of the primary-side switches at the low input voltage range can be reduced compared with the previous ZVS tuning method. Consequently, the efficiency of the WPT at the low input voltage range is improved. Moreover, the relationship between the input voltage and the output power is more linear than that of the previous ZVS tuning method. In addition, the proposed method has a lower start-up voltage. The analysis and validity of the proposed tuning method are verified by simulation and experimental results. A WPT system with up to 3.5 kW output power is built, and 95.9% overall peak efficiency is achieved. View Full-Text
Keywords: double-sided inductor/capacitor/capacitor (LCC); wireless power transfer (WPT); zero voltage switching (ZVS) double-sided inductor/capacitor/capacitor (LCC); wireless power transfer (WPT); zero voltage switching (ZVS)

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lu, S.; Deng, X.; Shu, W.; Wei, X.; Li, S. A New ZVS Tuning Method for Double-Sided LCC Compensated Wireless Power Transfer System. Energies 2018, 11, 307.

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