scholarly journals Leakage Magnetic Field Suppression using Wireless Power Transmission with Sandwiched Structure

2021 ◽  
Author(s):  
Misato Akiyama ◽  
Makoto Kitahara ◽  
Teru Obata ◽  
Hiroyasu Sano ◽  
Yukihisa Suzuki ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Power Transmission ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Leakage Magnetic Field ◽  
Sandwiched Structure ◽  
Field Suppression

A method for improving the wireless power transmission efficiency of an endoscopic capsule based on electromagnetic localization and synthesis of magnetic field vector

2010 ◽  
Vol 224 (7) ◽  
pp. 1463-1471 ◽  
Author(s):  
H Li ◽  
G Yan ◽  
P Gao
Keyword(s):  
Magnetic Field ◽  
Power Transmission ◽  
Field Vector ◽  
Magnetic Field Vector ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Electromagnetic Localization ◽  
Endoscopic Capsule

The method of wireless power transmission is an important method in powering wireless medical devices in vivo, but the efficiency is still low, especially when the devices move freely in random positions and orientations. Aiming at powering an endoscopic capsule, a method for improving efficiency of wireless power transmission is proposed, which is based on electromagnetic localization and synthesis of magnetic field vector. By analysing the model and experimenting in vitro, the proposed method is verified, which can improve the efficiency of the wireless power transmission because of accurate localization of the capsule and synthesis of magnetic field vector.

Research on Wireless Power Transmission Based on Magnetic Resonance Coupling

2013 ◽  
Vol 811 ◽  
pp. 651-656
Author(s):  
Hao Wang ◽  
An Na Wang ◽  
Qiang Zhao ◽  
Yu Zhang
Keyword(s):  
Magnetic Field ◽  
Magnetic Resonance ◽  
Power Transmission ◽  
Coupled Mode Theory ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Coupled Mode ◽  
Magnetic Resonance Coupling ◽  
Resonance Coupling ◽  
Resonance Process

e. The formalism of wireless power transmission is discussed coupled mode theory can be used to describe the resonance process. According to the changing process of input impedance and input current to describe the demarcate of resonant frequency. also demonstrate that loop circuits have an important effect of the resonant magnetic field distribution.

scholarly journals Phenomenon Analysis and Improvement of Magnetic Shield Fringe Effect on Wireless Power Transmission of EV

2021 ◽  
Vol 12 (4) ◽  
pp. 252
Author(s):  
Yening Sun ◽  
Yao Wei ◽  
Yi Tian
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Power Transmission ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Soft Magnetic ◽  
Magnetic Shield ◽  
Electrical Vehicle ◽  
Fringe Effect

An increment of magnetic field strength inevitably appears at the shield edge if a magnetic shield is made of a soft magnetic material, and that increment becomes more serious if this shield is combined with the chassis of an electrical vehicle (EV). This phenomenon is caused by the fringe effect, which limits the transfer efficiency of the coupler for the wireless power transmission (WPT) systems of EV. This phenomenon, and its relationships with some parameters, are analyzed in this paper, and these relationships are fitted to estimate the increment for different shield structures. A magnetic shield structure to reduce the increment of the magnetic field strength and improve coupler efficiency is herein proposed. The effectiveness and correctness of the fitting curves and the advantages of the proposed shield structure are demonstrated by finite element analyses results.

Sign in / Sign up

Export Citation Format

Share Document