Based on the model and principle of wireless power transfer,the magnetic field distribution of several different types of transmitting coils have been simulated and analyzed,which demonstrated that magnetic fields near the transmitting coil may be affected by size of the magnetic core opening,shape of interface between the magnetic material and air,and position of the coil located.Furthermore,a fan-ring shaped transmitting coil is optimized,when the coil is loaded with a current of 218 kHz frequency and 1.125 A amplitude,fields with magnetic flux density of 3.0-4.7 G will arise in a certain large space area,which may meet energy demand of the gastrointestinal capsule micro-robot.Comparing with the existing transmitting coils with the same purpose,the transmitting coil optimized in this paper has simple structure,significantly reduced size,and can meet the energy demand with smaller current.This work may provide a new feasible way to optimize transmitting coil applied in wireless energy transmission system.
关键词
胃肠道胶囊机器人/无线能量传输/发射线圈/磁芯/磁场
Key words
gastrointestinal capsule micro-robots/wireless power transfer/transmitting coils/magnetic core/magnetic field
维普
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