IEEE Transactions on Biomedical Circuits and Systems · 2008 · 578 citations · 13 references
EngineeringBiomedical EngineeringElectrical EngineeringLow-power DesignPower ElectronicsWireless CommunicationsFrequency ControlFrequency RegulationPower ControlResonant ConvertersSoft-switching TechniquesWireless Power TransferConverter ControlImplantable Wireless Power TransferPower RegulationResonant Frequency ControlResonant Power TransferVariable Frequency ControlWireless Power Transfer ControlWireless Power Transfer For Implants
Wireless power for implantable devices must cope with large coupling variations between internal and external systems. The study proposes regulating wireless power transfer by tuning the primary converter’s resonant frequency. The method adjusts frequency by varying tuning capacitance via soft‑switched phase control. The approach maintains power regulation across load, coupling, and circuit variations, and experiments confirm its effectiveness.
This paper presents a method to regulate the power transferred over a wireless link by adjusting the resonant operating frequency of the primary converter. A significant advantage of this method is that effective power regulation is maintained under variations in load, coupling and circuit parameters. This is particularly important when the wireless supply is used to power implanted medical devices where substantial coupling variations between internal and external systems is expected. The operating frequency is changed dynamically by altering the effective tuning capacitance through soft switched phase control. A thorough analysis of the proposed system has been undertaken, and experimental results verify its functionality.
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Design and analysis of an adaptive transcutaneous power telemetry for biomedical implants
Guoxing Wang, Wentai Liu, Mohanasankar Sivaprakasam et al. · IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications · 2005 · 433 citations
Engineering, Biomedical Engineering, Electrical Engineering +16