Med Biol Eng Comput - Geometry-based optimization of radio-frequency coils for powering neuroprosthetic implants.

Tópicos

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Resumo

Biomedical implants powered by inductive links have several advantages over batteries or percutaneous power linkages. The inductive link power transfer efficiency must be optimized to realize the full advantage over other power delivery technologies. Optimization is also important to reduce the electromagnetic radiation exposure, reduce secondary heating effects and improve power efficiency, so that large primary side storage batteries are not required. Geometric constraints, i.e., size and shape, of biomedical implants are a primary concern of device design. In this paper, we present a novel coil optimization strategy driven by geometric constraints. By considering the relationship between wire diameter, number of turns, quality factor, coupling coefficient and shape of coil, we can optimize the inductively coupled coils to maximize the power transfer efficiency under stringent geometric constraints. This new approach is verified using a design example targeted for an intraocular visual prosthesis. In this example, we demonstrate an experimental power transfer efficiency of 52% by co-optimization of the primary and secondary coils.

Resumo Limpo

biomed implant power induct link sever advantag batteri percutan power linkag induct link power transfer effici must optim realiz full advantag power deliveri technolog optim also import reduc electromagnet radiat exposur reduc secondari heat effect improv power effici larg primari side storag batteri requir geometr constraint ie size shape biomed implant primari concern devic design paper present novel coil optim strategi driven geometr constraint consid relationship wire diamet number turn qualiti factor coupl coeffici shape coil can optim induct coupl coil maxim power transfer effici stringent geometr constraint new approach verifi use design exampl target intraocular visual prosthesi exampl demonstr experiment power transfer effici cooptim primari secondari coil

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