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Analysis of Electromagnetic Exposure in Wireless Power Transfer System for Endoscopic Micro-robot
Authors:YE Dong-dong  YAN Guo-zheng  LI Jia-jun  WANG Kun-dong  MA Guan-ying
Affiliation:Institute of Precision Engineering and Intelligence Micro-system, School of Electronics and Information Technology, Shanghai Jiaotong University, Shanghai 200240, China
Abstract:A wireless power transfer system for endoscopic micro-robot operating at 36 kHz is presented in this paper. The issue of patient's health and safety regarding exposure to the electromagnetic field is addressed. The specific absorption rate and current density can be used to investigate the electromagnetic influences on the biological tissues surrounded by the wireless power launching coil. In view of this purpose, the limited close-wound solenoid electromagnetic model is built, the relationship between the electric intensity and the specific absorption rate and current density is deduced,and the simulation experiments are done. Experimental results show that the values of SAR and current density related to different tissue catalogs are all very small and do not exceed their own limits respectively when the resonance frequency of operation is 36 kHz.
Keywords:wireless power transfer  endoscopic micro-robot  specific absorption rate  current density  solenoid
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