scholarly journals Effect of Coil Structure on the Efficiency of Wireless Power Transfer System

2019 ◽  
Vol 9 (2) ◽  
pp. 3387-3392
Keyword(s):  
Wireless Power Transfer ◽  
Receiver Coil ◽  
Transfer System ◽  
Wireless Charging ◽  
Power Transfer ◽  
Wireless Power ◽  
Charging System ◽  
Coil Structure ◽  
Power Transfer Efficiency ◽  
Wireless Power Transfer System

A typical magnetic resonance based wireless power transfer (WPT) system comprises a transmitter coil and an embedded receiver coil used for wireless charging of the electrical and electronics devices. It has been investigated that the coil structure influence the power transfer efficiency of the wireless charging system .The investigations have been carried out in order to determine a suitable coil type and geometry so as to achieve higher efficiency of a wireless power transfer system. The present investigation will afford the design strategy for an efficient wireless charging system .

scholarly journals A comparative study on slim 3-D receiver coil structures for omnidirectional wireless power transfer applications

2019 ◽  
Vol 6 (2) ◽  
pp. 85-96
Author(s):  
Minxin Wu ◽  
Wenxing Zhong ◽  
Siew Chong Tan ◽  
S. Y. R. Hui
Keyword(s):  
Comparative Study ◽  
Mutual Coupling ◽  
Three Dimensional ◽  
Wireless Power Transfer ◽  
Receiver Coil ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Transmitter Coil ◽  
Wireless Power Transfer System

AbstractThis paper presents a comparative study on three types of slim coil structures used as a three-dimensional (3-D) receiver in a wireless power transfer system with a planar transmitter coil. The mutual coupling values and their variations between the receiver structures and the transmitter coil are compared under different distances and angular orientations with respect to the transmitter coil. The merits of performance are related to the consistency of the mutual coupling values under different orientations in a range of distances from the transmitter coil. The practical results show that slim 3-D receiver coil structures can be compatible with a planar transmitter coil with reasonably high-mutual coupling.

scholarly journals High Efficiency with Small Coils Area Ratio of Magnetic Resonant Wireless Power Transfer System

2018 ◽  
Vol 2 (6) ◽  
Author(s):  
Thabat Thabet ◽  
John Woods
Keyword(s):  
High Efficiency ◽  
Wireless Power Transfer ◽  
Area Ratio ◽  
Receiver Coil ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Flux Lines ◽  
Transmitter Coil ◽  
Wireless Power Transfer System

Wireless power transfer using magnetic resonance requires cutting flux lines generated from the transmitter coil by the receiver coil. This letter shows that an exact one to one coil area ratio or CAR (i.e. primary relative to secondary) is not a pre-condition to obtain high efficiency. It is also shown that high efficiency can be achieved for relatively small CARs by adjustment of the turns ratio. We go on to show that it is possible to achieve a higher energy efficiency than the coil area ratio and the associated flux cut would dictate.

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