scholarly journals Analysis and experimental results of frequency splitting of underwater wireless power transfer

2017 ◽  
Vol 2017 (7) ◽  
pp. 385-390 ◽  
Author(s):  
Wangqiang Niu ◽  
Wei Gu ◽  
Jianxin Chu
Keyword(s):  
Wireless Power Transfer ◽  
Experimental Results ◽  
Power Transfer ◽  
Wireless Power ◽  
Frequency Splitting

scholarly journals Analysis and Experiment for Wireless Power Transfer Systems with Two Kinds Shielding Coils in EVs

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 277
Author(s):  
Yushan Wang ◽  
Baowei Song ◽  
Zhaoyong Mao
Keyword(s):  
Electromagnetic Field ◽  
Wireless Power Transfer ◽  
Experimental Results ◽  
Field Analysis ◽  
Transfer Efficiency ◽  
Power Transfer ◽  
Wireless Power ◽  
Element Analysis ◽  
Surrounding Space ◽  
Electric Field Analysis

Electric vehicles (EVs) with wireless power transfer (WPT) systems are convenient, but WPT technology will produce a strong stray electromagnetic field (EMF) in the surrounding space when the system works with high power. Shielding coils can reduce stray EMF efficiently without additional control, and they have advantages of being simple, light, and cheap. In this paper, the series-opposing structure is compared systematically with the inductive structure based on circuit theory and electromagnetic field theory. Simplified circuit models are proposed to give an intuitive and comprehensive analysis of transfer efficiency. Electric field analysis and finite element analysis (FEA) is used to explain the functional principles of shielding coils and to compare the EMF distribution excited by two structures. The simulation results show that both structures decrease the mutual inductance and perform better than the system without shielding coils when they have the same transfer efficiency. Further, the inductive structure system performs best. The most important between two structures is that the shielding effects is independent of turns of shielding coils for inductive structure, while it can be adjusted by changing turns of shielding coils for the series-opposing structure. The experimental results show that the EMF is reduced by 65% for the inductive structure and 40% for the series-opposing structure. The theoretical analysis is confirmed by experimental results.

Frequency Splitting-Based Wireless Power Transfer and Simultaneous Propulsion Generation to Multiple Micro-Robots

2018 ◽  
Vol 18 (13) ◽  
pp. 5566-5575 ◽  
Author(s):  
R. Narayanamoorthi ◽  
A. Vimala Juliet ◽  
Bharatiraja Chokkalingam
Keyword(s):  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Frequency Splitting
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