A self-tuning inductive powering system for biomedical implants
(2011) Procedia Engineering — Vol. 25, p. 1585-1588 (2011)
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- Authors
- Abstract
- This paper describes the design and implementation of a self-tuning inductive powering system conceived for biomedical applications. The circuit operates at 1 MHz and delivers 380 mW to the implant with an efficiency of 50%, at a distance of 1 cm. Absorption modulation is used to monitor the circuit parameters allowing the system to deal with distance increases up to 5 cm as well as small coil misalignments. The automatic-tuning system adjusts the configuration of the coil driver depending on the self-monitored coupling, acting on a bank of switchable capacitors with a pattern defined by the received data. It is demonstrated that the implemented tuning strategy boosts the transmitted power by a factor two. In addition, the combination of tuning and smart power regulation was proven to sensibly increase the system efficiency by maintaining a constant energy level at the secondary.
- Affiliations
Citations
Carta, R., Thoné, J., Gosset, G., Cogels, G., Flandre, D., & Puers, R. (2011). A self-tuning inductive powering system for biomedical implants. Procedia Engineering, 25, 1585-1588. https://doi.org/10.1016/j.proeng.2011.12.392 (Original work published 2011)