Multiple-Frequency Three Coil Inductive Power Transmission with Non-Linear Relay Resonator

We propose near-field inductive power transfer with three coils in the frequency range of a few MHz. The relay coil is part of a non-linear resonator having a diode connected in parallel to the resonant capacitor. We achieve power transfer at multiple frequencies which can be tuned by the input powe...

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Bibliographic Details
Published inProceedings of IEEE Southeastcon pp. 34 - 39
Main Authors Puschel, Maximilian, Seliger, Norbert
Format Conference Proceeding
LanguageEnglish
Published IEEE 22.03.2025
Subjects
Coils
Frequency conversion
Hysteresis
Inductive power transmission
Integrated circuit modeling
nonlinear circuits
Relays
Resonant frequency
SPICE
Wireless power transfer
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Summary:We propose near-field inductive power transfer with three coils in the frequency range of a few MHz. The relay coil is part of a non-linear resonator having a diode connected in parallel to the resonant capacitor. We achieve power transfer at multiple frequencies which can be tuned by the input power level and mutual coupling between the coils. Higher harmonic generation is found dominant at lower input power, whereas subharmonic generation (period doubling and period quadrupling) is observed at high levels. Power transfer at subharmonics reveals robustness against level perturbations due to pronounced amplitude hysteresis effect. A circuit simulation based on standard non-linear diode SPICE models confirms the experimental results which are obtained on a demonstration prototype.
ISSN:1558-058X
DOI:10.1109/SoutheastCon56624.2025.10971670