A Comparative Study on Overall Efficiency of Two-Dimensional Wireless Power Transfer Systems Using Rotational and Directional Methods

Two-dimensional (2-D) wireless power transfer (WPT) systems can be controlled by either the directional method or the rotational method. The rotational method refers to the use of omnidirectional transmitter generating rotational flux regardless of the load positions, while the directional method re...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2022-01, Vol.69 (1), p.260-269
Main Authors: Wang, Hanwei, Zhang, Cheng, Yang, Yun, Liang, Hui Wen Rebecca, Hui, Shu Yuen Ron
Format: Article
Language:English
Subjects:
Amplitude modulation
Comparative studies
Control systems
Directional method
Efficiency
Magnetic fields
Magnetic flux
Power consumption
Receivers
rotational method
Transmitters
Two dimensional analysis
two-dimensional (2-D)
Wireless communication
Wireless power transfer
wireless power transfer (WPT)
Wireless power transmission
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Summary:Two-dimensional (2-D) wireless power transfer (WPT) systems can be controlled by either the directional method or the rotational method. The rotational method refers to the use of omnidirectional transmitter generating rotational flux regardless of the load positions, while the directional method refers to the use of omnidirectional transmitter generating magnetic flux directly toward the power-consuming load directions. This article compares the overall efficiency of the two methods for 2-D WPT systems. Theoretical analysis reveals that the directional WPT can be more efficient than the rotational WPT with either single or multiple loads when the magnetic field vector is controlled within the feasible zones; and the efficiency difference between the two methods are more significant when the dimensions of the receiver coils are smaller. Both simulation and experimental results are consistent in validating the two discoveries. They indicate that the averaged efficiency of the directional method is at least 5% higher than that of the rotational one.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3048317