Operating characteristics of four‐coil magnetic resonant coupling wireless power transfer under different resonant states

2020 ◽  
Author(s):  
Meng Wang ◽  
Haoran Wang ◽  
Yiming Zhang ◽  
Yanyan Shi ◽  
Lan Yang
Keyword(s):  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Operating Characteristics ◽  
Resonant Coupling ◽  
Resonant States

Thin Film Coil Design Considerations for Wireless Power Transfer in Flat Panel Display

2012 ◽  
Vol 1388 ◽  
Author(s):  
Jun Yu ◽  
Kai Ying ◽  
David Hasko ◽  
Sungsik Lee ◽  
Arman Ahnood ◽  
...  
Keyword(s):  
Thin Film ◽  
Metal Layer ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Flat Panel Display ◽  
Wireless Power ◽  
Flat Panel ◽  
Resonant Coupling ◽  
Ac Power ◽  
Spiral Coils

AbstractWireless power transfer is experimentally demonstrated by transmission between an AC power transmitter and receiver, both realised using thin film technology. The transmitter and receiver thin film coils are chosen to be identical in order to promote resonant coupling. Planar spiral coils are used because of the ease of fabrication and to reduce the metal layer thickness. The energy transfer efficiency as a function of transfer distance is analysed along with a comparison between the theoretical and the experimental results.

scholarly journals Free-Positioning Wireless Power Transfer Using a 3D Transmitting Coil for Portable Devices

2020 ◽  
Vol 20 (4) ◽  
pp. 270-276
Author(s):  
Nam Ha-Van ◽  
Hoang Le-Huu ◽  
Minh Thuy Le ◽  
Kwangsuk Park ◽  
Chulhun Seo
Keyword(s):  
Three Dimensional ◽  
Wireless Power Transfer ◽  
Receiver Coil ◽  
Portable Devices ◽  
Power Transfer ◽  
Wireless Power ◽  
Transfer Energy ◽  
Resonant Coupling ◽  
Power Transfer Efficiency ◽  
Receiving Coil

The free-positioning wireless power transfer (WPT) system has drawn attention in recent years. Traditionally, a WPT system can transfer energy in one or two directions on the same plane, but it leads the restrictions of angle and axis misalignment between a transmitter and a receiver coil. In this paper, we propose a free-positioning WPT system using a three-dimensional cubic-shaped transmitting coil for portable device charging. A small receiving coil is placed inside the transmitter to achieve the transferred energy through the magnetic resonant coupling. In addition, the equivalent circuit and the mutual inductance between the Tx and Rx coils are analyzed. Finally, a practical experiment is implemented to verify the transfer performance, which can reach up to about 50% power transfer efficiency. The proposed system can charge in spatial freedom.

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