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2024-07-17
A Novel Three-Coil WPT System with Automatic CC-CV Transition Function
By
Progress In Electromagnetics Research Letters, Vol. 121, 87-91, 2024
Abstract
In order to prolong the service life of lithium batteries, the charging process is usually divided into two stages: first constant current (CC) charging, and then constant voltage (CV) charging. This letter proposes a three-coil structure wireless power transfer (WPT) system to realize inherent CC and CV characteristics and automatic CC-CV transition function. During charging, the proposed system can operate in S-S-LCC tank for CC charging and in S-S-S tank for CV charging, respectively. Different from the previous closed-loop control, hybrid topology switching and dual-frequency switching methods, the proposed method has automatic CC-CV transition function due to the special circuit structure. Therefore, the communication links, state-of-charge detection circuits and open-circuit protection circuits are omitted, which ensures the high reliability and low cost of the system. Finally, a verification experimental prototype with a rated power of 480 W is built to verify the feasibility of the proposed system.
Citation
Xuebin Zhou, Yilin Wang, Yuhang Jiang, and Lin Yang, "A Novel Three-Coil WPT System with Automatic CC-CV Transition Function," Progress In Electromagnetics Research Letters, Vol. 121, 87-91, 2024.
doi:10.2528/PIERL24041405
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