A Wireless Power Transfer System With Hybrid Control for Constant Current and Voltage Output

This article proposes the wireless power transfer (WPT) system that achieves both inherent constant current and constant voltage (CV) outputs by switching the fixed frequency control strategy and the self-oscillating control strategy. Initially, the proposed system is analyzed by the M model, and...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2022-10, Vol.10 (5), p.6317-6331
Main Authors: Wei, Zhihao, Zhang, Bo, Shu, Xujian, Rong, Chao
Format: Article
Language:English
Subjects:
Batteries
Constant voltage (CV) mode
Control systems
coupling coefficient
Coupling coefficients
Couplings
Electric potential
Frequency control
Hybrid control
Hybrid systems
Load resistance
Misalignment
Parameter estimation
Resistance
Resonant frequency
Self oscillation
self-oscillating
Switches
Voltage
Wireless communication
Wireless communications
wireless power transfer (WPT)
Wireless power transmission
Workflow
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Description
Summary:This article proposes the wireless power transfer (WPT) system that achieves both inherent constant current and constant voltage (CV) outputs by switching the fixed frequency control strategy and the self-oscillating control strategy. Initially, the proposed system is analyzed by the M model, and the transmission performance of the proposed WPT system under different control strategies is studied. The output voltage of the proposed system in the CV mode is not only independent of the load resistance but also irrespective of the coupling coefficient; hence, the system has a high misalignment tolerance. Moreover, a method for estimating parameters is presented, and this approach can monitor the load resistance and coupling coefficient only by detecting the primary side current, and the proposed system does not require wireless communication. The workflow of the system is designed. Finally, the feasibility of the proposed method is verified by the experimental results obtained from the laboratory prototype.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2022.3151107