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Energies 2017, 10(4), 474;

A Novel High Controllable Voltage Gain Push-Pull Topology for Wireless Power Transfer System

School of Automation, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400030, China
Author to whom correspondence should be addressed.
Academic Editor: Chunhua Liu
Received: 2 February 2017 / Revised: 27 March 2017 / Accepted: 29 March 2017 / Published: 1 April 2017
(This article belongs to the Section Electrical Power and Energy System)
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Wireless Power Transfer (WPT) is commonly used to transmit power from a transmitting coil to various movable power devices. In the WPT system, due to a resonant tank inherent characteristic, the system cannot achieve a high output voltage gain. This paper proposes a novel current-fed push–pull circuit to realize high output voltage gain by adding a bi-directional switch between the resonant network and inverter. To obtain a high voltage gain, this paper proposes energy storage and energy injection mode to realize an energy boost function. A duty cycle control method for mode switching is also proposed. The proposed method allows the converter to operate with a variable voltage gain over a wide range with high efficiency. Experimental validation shows that the system gain of a proposed circuit can achieve a variable gain from 2 to 7 of which the converter can be two times higher than the classical system with the same condition. View Full-Text
Keywords: wireless power transfer; push–pull circuit; voltage gain wireless power transfer; push–pull circuit; voltage gain

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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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Duan, Q.; Li, Y.; Dai, X.; Zou, T. A Novel High Controllable Voltage Gain Push-Pull Topology for Wireless Power Transfer System. Energies 2017, 10, 474.

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