Geometry-based optimization of radio-frequency coils for powering neuroprosthetic implants

被引：0
作者：
Jungsuk Kim
Eric Basham
Kenneth D. Pedrotti
机构：
[1] University of California at Santa Cruz,Department of Computer Engineering
[2] San Jose State University,Department of Electrical Engineering
[3] University of California at Santa Cruz,Department of Electrical Engineering
来源：
Medical & Biological Engineering & Computing | 2013年 / 51卷
关键词：
Coil optimization; Inductively coupled coils; Implant telemetry; Power transfer efficiency; Radio-frequency powering; Transcutaneous link; Retinal prosthesis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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.
引用
收藏
页码：123 / 134
页数：11
相关论文
共 95 条
[1]  
Belayev A(2003)Enriched environment delays the onset of hippocampal damage after global cerebral ischemia in rats Brain Res 964 121-127
[2]  
Saul L(2010)An integrated 256-channel epiretinal prosthesis IEEE J Solid State Circuits 45 1946-1956
[3]  
Liu Y(2007)A highly flexible system for microstimulation of the visual cortex: design and implementation IEEE Trans Biomed Circuit Syst 1 258-269
[4]  
Zhao W(1983)Analysis of resonant coupled coils in the design of radio frequency transcutaneous links Med Biol Eng Comput 21 612-627
[5]  
Ginsberg MD(1966)Effects of eddy currents in transformer windings IEEE the Inst Electric Eng 113 1387-1394
[6]  
Valdes MA(1994)Improved analytical modeling of conductive losses in magnetic components IEEE Trans Power Electron 9 127-131
[7]  
Busto R(1977)Idealized operation of the class E tuned power amplifier IEEE Trans Circuit Syst 24 725-735
[8]  
Belayev L(2007)A wide-band power-efficient inductive wireless link or implantable microelectronic devices using multiple carriers IEEE Trans Circuit Syst 54 2211-2221
[9]  
Chen K(2004)A wideband frequency-shift keying wireless link for inductively powered biomedical implants IEEE Trans Circuit Syst I 51 2374-2383
[10]  
Zhi Y(2007)A low-power integrated circuit for a wireless 100-electrode neural recording system IEEE J Solid State Circuits 42 123-133
12345678910