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Energies 2017, 10(7), 1000; https://doi.org/10.3390/en10071000

A Phase-Shifted Control for Wireless Power Transfer System by Using Dual Excitation Units

1
School of Automation, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400030, China
2
No. 24 Research Institute of CETC, Nanping Huayuan Road No. 14, Nan’an District, Chongqing 400060, China
*
Author to whom correspondence should be addressed.
Received: 14 June 2017 / Revised: 12 July 2017 / Accepted: 12 July 2017 / Published: 14 July 2017
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Abstract

Wireless power transfer (WPT) technology can provide intelligent robots with a flexible, robust, and safe power supply, especially in very harsh environments including high humidity and high temperature. To meet increasing power requirement for robotic applications, this paper proposes a novel method to increase system power transfer capability without increasing voltage and current stress, realized by using dual excitation units at the primary side. On this basis, this paper proposes a phase-shifted control method for output power regulation which can keep efficiency high. At the same time, the system is proved to have a better output robust characteristic by analysis under the condition of parameter variation. Finally, experimental results show the proposed dual excitation units (DEU)-WPT system can increase output power by at least three times compared to classical WPT system, and the efficiency is improved by 9%. View Full-Text
Keywords: wireless power transfer; dual excitation units; impedance analysis; phase-shifted wireless power transfer; dual excitation units; impedance analysis; phase-shifted
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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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Dai, X.; Jiang, J.; Li, Y.; Yang, T. A Phase-Shifted Control for Wireless Power Transfer System by Using Dual Excitation Units. Energies 2017, 10, 1000.

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