Authors
Junwen Li, Xun Liu, Ka Nang Leung
Publication date
2024/3/27
Journal
IEEE Transactions on Power Electronics
Publisher
IEEE
Description
This article proposes a hybrid wireless power transfer (WPT) system working in both magnetically coupled resonance (MCR) and parity-time symmetry (PT) modes to provide a wide dynamic output power range. Theoretically, it can operate with arbitrary coupling coefficients of the coupling coils and loads. More optimization freedoms can be released when comparing with the existing single-mode (i.e., either MCR or PT) WPT systems, such that a wider dynamic output power range and higher system efficiency are achieved simultaneously. Analytical models are developed. The analytical control-to-output transfer function in the PT mode reveals the fact that a complex-pole pair and a right-half-plane zero, which limit the loop-bandwidth of the PT-WPT system, exist in the control loop. Thus, a current-mode modulation scheme for the proposed WPT system in the PT mode is proposed to extend the loop-bandwidth …
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