A Novel WPT System Based on Dual Transmitters and Dual Receivers for High Power Applications: Analysis, Design and Implementation

Yong Li,Tianren Lin,Hongjian Sun,Ruikun Mai,Zhengyou He

doi:10.3390/en10020174

Yong Li, Tianren Lin + Show 3 more

Open Access

https://doi.org/10.3390/en10020174

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Journal: Energies	Publication Date: Feb 4, 2017
Citations: 44	License type: CC BY 4.0

Affiliation: Southwest Jiaotong University, Durham University

Abstract

Traditional Wireless Power Transfer (WPT) systems only have one energy transmission path, which can hardly meet the power demand for high power applications, e.g., railway applications (electric trains and trams, etc.) due to the capacity constraints of power electronic devices. A novel WPT system based on dual transmitters and dual receivers is proposed in this paper to upgrade the power capacity of the WPT system. The reliability and availability of the proposed WPT system can be dramatically improved due to the four energy transmission paths. A three-dimensional finite element analysis (FEA) tool ANSYS MAXWELL (ANSYS, Canonsburg, PA, USA) is adopted to investigate the proposed magnetic coupling structure. Besides, the effects of the crossing coupling mutual inductances among the transmitters and receivers are analyzed. It shows that the same-side cross couplings will decrease the efficiency and transmitted power. Decoupling transformers are employed to mitigate the effects of the same-side cross couplings. Meanwhile, the output voltage in the secondary side can be regulated at its designed value with a fast response performance, and the system can continue work even with a faulty inverter. Finally, a scale-down experimental setup is provided to verify the proposed approach. The experimental results indicate that the proposed method could improve the transmitted power capacity, overall efficiency and reliability, simultaneously. The proposed WPT structure is a potential alternative for high power applications.

Highlights

Wireless power transfer technology is a promising approach to deliver power from power source to loads without physical contact [1,2,3,4]
The single transmitter and single receiver based magnetic coupling structure results in a low reliability of the Wireless Power Transfer (WPT) system due to the only one energy transmission path, and it unlikely meets the requirement of high power applications since public transport systems need to be rated at hundreds of kVA or more [14]
Each transmitter is the connected a resonant and the results presented in Section circuit with topology of theisinverter, proposed share a common

Summary

Introduction

Wireless power transfer technology is a promising approach to deliver power from power source to loads without physical contact [1,2,3,4]. It has been employed for various applications including biomedical implants [5,6], mining applications [7], under-water power supply [8] and electric vehicles [9,10,11,12,13,14] with the advantages of being unaffected by ice, water or other chemicals. It is significant to investigate approaches which can enhance the transmitted power of WPT systems by using low-power and low-cost semiconductor devices for high power application e.g., railway transport (electric trains and trams, etc.) [14]

Results

Discussion

Conclusion