期刊
ENERGIES
卷 13, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/en13041008
关键词
wireless power transfer; implantable medical device; cardiac monitoring system; ohmic loss; thermal radiation; magnetic guide
资金
- National Research Foundation of Korea (NRF) - Korea Government (MSIT) [2017R1A1A1A05001350]
- National Research Foundation of Korea (NRF) - Korean Government (MSIP) [2017R1A5A1015596]
- National Research Foundation of Korea [2017R1A1A1A05001350] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 x 24 x 8 mm(3) and implanted it in a rat. We confirmed that the temperature of the wireless charging device increased by only 2 degrees C during the 70 min charging, which makes it safe enough to use as an implantable medical device charging system.
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