An Efficient Topology for Wireless Power Transfer over a Wide Range of Loading Conditions

Tianqing Li, Xiangzhou Wang, Shuhua Zheng and Chunhua Liu
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Tianqing Li: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Xiangzhou Wang: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Shuhua Zheng: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Chunhua Liu: School of Energy and Environment, City University of Hong Kong, Hong Kong, China

Energies, 2018, vol. 11, issue 1, 1-16

Abstract: Although an inductive power transfer (IPT) system can transfer power efficiently in full-load conditions, its efficiency obviously decreases in light-load conditions. To solve this problem, based on a two-coil IPT system with a series-series compensation topology, a single-ended primary-inductor converter is introduced at the secondary side. By adjusting the set effective value of the current in the primary coil, the converter input voltage changes to maintain the equivalent input resistance of the converter in an optimal condition. The system can then transfer the power efficiently with the wide load conditions. Moreover, the system operates at a constant resonance frequency with a high power factor. Both the simulation and experimentation of a prototype with a 10 W IPT system demonstrate the effectiveness of the proposed topology for wireless power transfer.

Keywords: wireless power transfer; inductive power transfer (IPT); single-ended primary-inductor converter; high efficiency; wide-load conditions (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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