Simulation and Design of Wireless Energy Transmission for Implantable Micro-Electromechanical Devices

Abstract:

The purpose of this study is to describe a novel topologic technology for wireless power transmitting through external coils to multiple implantable micro-electromechanical devices inside the patient body, which is able to solve the dilemma of recharging. Wireless power transmitters are designed based on class π-type topologic structure, which improves existing Class-E power amplifier structure and impedance matching technology. Mathematical Models based on resonating chopper MOSFET and class π-type impedance matching network are introduced to optimize the design parameters. Together with proper capacitors and high-flux, low-loss inductors, an optimal wireless power transmitter with significant characteristics of high efficiency and low loss takes advantage of this brand new type of topologic structure. The author designed and developed the RF oscillator and the actual class E power resonant amplifier. During studies, with the 12V power supply, the voltage of 96.8V is generated on the 50ohm high-power RF load side, along with source current of 2.183A. The efficiency of the system reaches 89.4%, which satisfied the need for implantable micro-electromechanical device.

• Periodical: Advanced Materials Research (Volumes 765-767)
• Pages: 2345-2350
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.765-767.2345
• Online since: September 2013
• Authors: Jian Chen, Lei Ma, Wei Zhang, Yao Li
• Keywords: Class π-Type Topologic Technology, Functional Electrical Stimulation, High-Efficiency, Wireless Power Transmission System

References

[1] Loeb GE, Richmond FJ, et al. RF-powered BIONs for stimulation and sensing. IEEE Engineering in Medicine & Biology Society. (2004).

[2] John K. Chapin, Karen A. Moxon. Neural prostheses for restoration of sensory and motor function. (2000).

DOI: 10.1201/9781420039054

[3] J.W. S., S.B. C., Lee D. An investigation on piezoelectric energy harvesting for MEMS power sources. The Journal of Mechanical Engineering Science. (2005).

[4] Ghahary A., Cho B.H. Design of a transcutaneous   energy transmission system using a series resonant converter. Power Electronics Specialists Conference. 1990, 1-8.

DOI: 10.1109/pesc.1990.131165

[5] Sarpeshkar R, Salthouse C. J. S. et al. An ultra-low-power programmable analog bionic ear processor. IEEE Transactions on Biomedical Engineering. (2005).

DOI: 10.1109/tbme.2005.844043

[6] Anton S, Sodano H. A review of power harvesting using piezoelectric materials(2003-2006),. Smart Materials and Structures . (2007).

DOI: 10.1088/0964-1726/16/3/r01

[7] El-Hamamsy S.A. Design of high-efficiency RF class-d power amplifier,. IEEE Transactions on Power Electronics. (1994).

DOI: 10.1109/63.311263

[8] Kazimierczuk M., Puczko K. Exact analysis of class-e tuned power amplifier at any q and switch duty cycle,. IEEE Transactions on Circuits and Systems. (1987).

DOI: 10.1109/tcs.1987.1086114

[9] Sokal N. O, Sokal A.D. Class E- A new class of high-efficiency tuned single-ended switching power amplifiers. Solid-State Circuits. 1975, 10 (3). 168-176.

DOI: 10.1109/jssc.1975.1050582

[10] Yan G, Zan P, Ye D. et al. Design of transcutaneous energy transmission system for artificial anal sphincter,. International Conference on Mechanotronics and Automation . (2007).

DOI: 10.1109/icma.2007.4303760

[11] Choi S.W., Lee M.H. Coil-capacitor circuit design of a transcutaneous energy transmission system to deliver stable electric power,. ETRI Journal . (2008).

DOI: 10.4218/etrij.08.0108.0321