Research On Electromagnetic-Temperature Field Characteristics Of Implanted Resonant Wireless Energy Supply System

The use of active implantable medical devices has become a widely used treatment method.However,the active implantable medical device uses batteries as a power source,which severely limits its service life and brings the pain of secondary surgery to patients.Therefore,it is of practical significance to transmit wireless energy to active implantable medical devices.When the active implantable medical device is transmitting wireless energy,due to the presence of the receiving end shell,eddy current loss will occur,resulting in an increase in the temperature of the device,which may pose a second threat to the patient’s life and health.Therefore,it is of great significance to study the temperature characteristics of active implantable medical devices in wireless energy transmission.In order to study the temperature field distribution law,a two-dimensional transient equivalent model of the wireless energy transmission system of the implantable medical device is established,and an electromagnetic-thermal-fluid-solid multi-field fully coupled analysis method is used,in which electromagnetic heat is used as the heat source.The effects of factors such as heat conduction and convection are considered.One-,two-and three-dimensional images and distribution rules of temperature and efficiency change with frequency are obtained through simulation calculations.While considering the temperature rise,the transmission efficiency was tested to obtain The relationship between temperature rise and transmission efficiency in different resonance frequency ranges.Meanwhile,considering the safety of the human body and the economics of transmission efficiency,the existing temperature characteristics and transmission efficiency are optimized to lay the foundation for further clinical applications.In order to verify the correctness of the simulation,a temperature characteristic experiment is designed.The SHT30 digital temperature sensor is used to detect the temperature,and the temperature distribution of the housing surface of the receiving end is observed by a high-precision FLIR T420 thermal imager.The comparison of experimental data and simulation results proves the rationality of the proposed analysis method.The results can provide calculation basis for the design of wireless energy transmission system of implantable medical equipment,improve the safety of implantable medical equipment,and reduce the occurrence of medical accidents.At the same time,it has certain reference value for the clinical application of implantable medical devices.