A PLL control for self-tuning of parallel wireless power transfer receivers utilizing switch-mode gyrator emulated inductors
Document typeConference lecture
Rights accessOpen Access
In multiple receivers wireless power transfer (WPT) systems, it is preferable to retune the resonant frequency of every receiver to the transmitter operating frequency in front of frequency mismatches. This paper discusses a proposal for electronic tuning for WPT receivers by means of a variable active switch-mode inductance. The proposed method benefits from the gyrator concept to emulate a variable inductance. Instead of the conventional approach of linear amplifier based implementation of a gyrator, a switch-mode gyrator circuit is exploited for more efficient operation. Additionally, a PLL-like control is presented to enable self-tuning for the receiver resonant tank. Furthermore, a design-space characterization for the system dynamic behavior has been discussed to show the control robustness and the instabilities (including slow-scale and fast-scale chaotic instabilities) it may undergo.
CitationSaad, M.A., Martinez, H., Alarcon, E. A PLL control for self-tuning of parallel wireless power transfer receivers utilizing switch-mode gyrator emulated inductors. A: European Conference on Power Electronics and Applications. "Proceedings of the 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)". 2017, p. P1-P10.