Design of an Inductive Power Transfer System with Flexible Coils for Body-worn Applications

15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Clare, L.R.^1 ; Burrow, S.G.^1 ; Stark, B.H.^1 ; Grabham, N.J.^2 ; Beeby, S.P.^2

University of Bristol, United Kingdom^1

University of Southampton, United Kingdom^2

关键词: Coil couplings;    Field strengths;    Flexible coils;    Human exposures;    Inductive power transfer;    Inductive power transfer systems;    Maximum field strength;    Variable coupling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012135/pdf
DOI  :  10.1088/1742-6596/660/1/012135

来源: IOP

【 摘 要 】

This paper describes an IPT (Inductive Power Transfer) system for body worn electronics, and investigates the challenges for an IPT system that arise specifically in this scenario. Principally, these are: highly variable coil coupling through time-varying miss-alignment and coil separation; a requirement that one or both of the coils must be wearable and thus flexible; and proximity to the human body introducing limits on the maximum EM field. The highly variable coupling results in a system that must operate effectively with a large range of received powers, whilst the constraints on the realisation of the coils typically reduce the Q-factor; the human exposure considerations limit both the maximum field strengths that the wearer of a receiver coil might experience, and also the field strengths that a 3rdparty might be exposed to, for instance when approaching the transmit coil.