| Summary: | In order to accurately evaluate the safety of electromagnetic exposure generated by wireless charging of pacemakers, the modeling constructions and simulation calculations were performed by the finite element simulation software COMSOL. Firstly, the models of human brain tissue, a simple thorax and heart were constructed. The distributions of magnetic induction intensity (B), induced electric field intensity (E), as well as the distribution of SAR values in human head tissue generated in those three parts were obtained. In the calculations, the operating frequency of the wireless charging system was set to 251 kHz. Simulation results showed that maximum B value in human head model was 0.337 µT, accounting for 9.26% of ICNIRP threshold, the maximum E value was 0.393 V/m, accounting for 0.45% of ICNIRP threshold. In human heart model, the maximum B value was 3.118 µT, accounting for 85.01% of ICNIRP threshold, the maximum E value was 0.278 V/m, accounting for 0.32% of ICNIRP threshold. And in human brain tissue, SAR value was 3.009×10-7 W/kg, which was much lower than the recommended value of public electromagnetic exposure established by ICNIRP. This indicates that the wireless charging process of the pacemaker will not pose a health risk to users.
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