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Energies
Volume 13
Issue 4
10.3390/en13041008
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Article

Design and Implementation of a Wireless Charging-Based Cardiac Monitoring System Focused on Temperature Reduction and Robust Power Transfer Efficiency

by
Dongwook Kim
1,
Dawon Jeong
1,
Jongwook Kim
1,
Haerim Kim
1,
Junho Kim
2,
Sung-Min Park
2,3 and
Seungyoung Ahn
1,*
1
The Cho Chun Shik Graduate School for Green Transportation, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
2
School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
3
Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
*
Author to whom correspondence should be addressed.
Energies 2020, 13(4), 1008; https://doi.org/10.3390/en13041008
Submission received: 29 January 2020 / Revised: 18 February 2020 / Accepted: 20 February 2020 / Published: 24 February 2020
(This article belongs to the Special Issue Intelligent Wireless Power Transfer System and Its Application)
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Abstract

Wireless power transfer systems are increasingly used as a means of charging implantable medical devices. However, the heat or thermal radiation from the wireless power transfer system can be harmful to biological tissue. In this research, we designed and implemented a wireless power transfer system-based implantable medical device with low thermal radiation, achieving 44.5% coil-to-coil efficiency. To suppress thermal radiation from the transmitting coil during charging, we minimized the ESR value of the transmitting coil. To increase power transfer efficiency, a ferrite film was applied on the receiving part. Based on analyses, we fabricated a cardiac monitoring system with dimensions of 17 × 24 × 8 mm3 and implanted it in a rat. We confirmed that the temperature of the wireless charging device increased by only 2 °C during the 70 min charging, which makes it safe enough to use as an implantable medical device charging system.
Keywords: wireless power transfer; implantable medical device; cardiac monitoring system; ohmic loss; thermal radiation; magnetic guide wireless power transfer; implantable medical device; cardiac monitoring system; ohmic loss; thermal radiation; magnetic guide

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MDPI and ACS Style

Kim, D.; Jeong, D.; Kim, J.; Kim, H.; Kim, J.; Park, S.-M.; Ahn, S. Design and Implementation of a Wireless Charging-Based Cardiac Monitoring System Focused on Temperature Reduction and Robust Power Transfer Efficiency. Energies 2020, 13, 1008. https://doi.org/10.3390/en13041008

AMA Style

Kim D, Jeong D, Kim J, Kim H, Kim J, Park S-M, Ahn S. Design and Implementation of a Wireless Charging-Based Cardiac Monitoring System Focused on Temperature Reduction and Robust Power Transfer Efficiency. Energies. 2020; 13(4):1008. https://doi.org/10.3390/en13041008

Chicago/Turabian Style

Kim, Dongwook, Dawon Jeong, Jongwook Kim, Haerim Kim, Junho Kim, Sung-Min Park, and Seungyoung Ahn. 2020. "Design and Implementation of a Wireless Charging-Based Cardiac Monitoring System Focused on Temperature Reduction and Robust Power Transfer Efficiency" Energies 13, no. 4: 1008. https://doi.org/10.3390/en13041008

APA Style

Kim, D., Jeong, D., Kim, J., Kim, H., Kim, J., Park, S.-M., & Ahn, S. (2020). Design and Implementation of a Wireless Charging-Based Cardiac Monitoring System Focused on Temperature Reduction and Robust Power Transfer Efficiency. Energies, 13(4), 1008. https://doi.org/10.3390/en13041008

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