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Energies 2017, 10(4), 474; doi:10.3390/en10040474

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
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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)
View Full-Text   |   Download PDF [4026 KB, uploaded 18 April 2017]   |  

Abstract

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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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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