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

Qichang Duan, Yanling Li, Xin Dai and Tao Zou
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Qichang Duan: School of Automation, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400030, China
Yanling Li: School of Automation, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400030, China
Xin Dai: School of Automation, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400030, China
Tao Zou: School of Automation, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400030, China

Energies, 2017, vol. 10, issue 4, 1-13

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.

Keywords: wireless power transfer; push–pull circuit; voltage gain (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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