Columnar transmitter based wireless power delivery system for implantable device in freely moving animals

A wireless power delivery system is developed to deliver electrical power to the neuroprosthetic devices that are implanted into animals freely moving inside the cage. The wireless powering cage is designed for long-term animal experiments without cumbersome wires for power supply or the replacement of batteries. In the present study, we propose a novel wireless power transmission system using resonator-based inductive links to increase power efficiency and to minimize the efficiency variations. A columnar transmitter coil is proposed to provide lateral uniformity of power efficiency. Using this columnar transmitter coil, only 7.2% efficiency fluctuation occurs from the maximum transmission efficiency of 25.9%. A flexible polymer-based planar type receiver coil is fabricated and assembled with a neural stimulator and an electrode. Using the designed columnar transmitter coil, the implantable device successfully operates while it moves freely inside the cage.

[1]  S. J. Kim,et al.  Functional Regeneration of a Severed Peripheral Nerve With a 7‐mm Gap in Rats Through the Use of An Implantable Electrical Stimulator and a Conduit Electrode With Collagen Coating , 2010, Neuromodulation : journal of the International Neuromodulation Society.

[2]  D.J. Young,et al.  Adaptive RF power control for wireless implantable bio-sensing network to monitor untethered laboratory animal real-time biological signals , 2008, 2008 IEEE Sensors.

[3]  Robert Puers,et al.  An inductive power system with integrated bi-directional data-transmission , 2004 .

[4]  C.M. Zierhofer,et al.  High-efficiency coupling-insensitive transcutaneous power and data transmission via an inductive link , 1990, IEEE Transactions on Biomedical Engineering.

[5]  M. Soljačić,et al.  Wireless Power Transfer via Strongly Coupled Magnetic Resonances , 2007, Science.

[6]  Darrin J. Young.  Wireless powering and data telemetry for biomedical implants , 2009, 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[7]  Robert Puers,et al.  A wireless power supply system for robotic capsular endoscopes , 2010 .

[8]  Wentai Liu,et al.  An optimal design methodology for inductive power link with class-E amplifier , 2005, IEEE Transactions on Circuits and Systems I: Regular Papers.

[9]  Takehiro Imura,et al.  Maximizing Air Gap and Efficiency of Magnetic Resonant Coupling for Wireless Power Transfer Using Equivalent Circuit and Neumann Formula , 2011, IEEE Transactions on Industrial Electronics.

[10]  Robert Puers,et al.  Inductive powering of a freely moving system , 2005 .