Impedance Buffer-Based Reactance Cancellation Method for CLC-S Compensated Wireless Power Transfer

doi:10.1109/TIE.2023.3314863

Impedance Buffer-Based Reactance Cancellation Method for CLC-S Compensated Wireless Power Transfer

2024-07-01

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DOI：10.1109/TIE.2023.3314863

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Due to the inevitable variation of component parameters, interference of ferromagnetic foreign body, active regulation of operation frequency, and rectification effect caused virtual capacitance or inductance, zero-phase-angle (ZPA) operation and zero-voltage switching (ZVS) could hardly be maintained without extra control strategies, especially for high-order compensation WPT system. Accordingly, this article proposes and implements an impedance buffer-based reactance cancellation method for a capacitor-inductor-capacitor-series (CLC-S) compensated wireless power transfer system with robust ZVS. The proposed reactance cancellation method adopts a synchronous impedance buffer series connected with the CLC compensation network to realize full-range ZPA operation. It can also be regulated to ZVS switching conditions under a large tolerance of the abovementioned issues. In addition, the proposed concept holds the characteristic of communication-free, feedback-free, simple control, and no strict constraints imposed by parameters in high-order compensation. Theoretical analysis, simulated, and experimental results are given to verify the feasibility of the proposed reactance cancellation method.

Keywords:

High-order CLC transformation

reactancecancellation

wireless power transfer (WPT)

zero-voltageswitching (ZVS)

Impedance Buffer-Based Reactance Cancellation Method for CLC-S Compensated Wireless Power Transfer

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