| Implantable devices can be used to monitor changes in the physical and chemical parameters of patients,to diagnose and treat the disease,and to replace some organs that have lost function.Transcutaneous energy transfer system,used to provide electrical energy to the implanted devices,is applied for wireless energy transmission by using transcutaneous transformer.Therefore,the battery is not necessarily replaced by use of surgery,which means less infection and greatly improved quality of life for the patients.When the load,the input voltage and the transformer air gap change or the axial dislocation occurs,the transmission performance changes as well,resulting to less safe,stable and efficient work of the implanted devices.Thus,the health and safety of patients is seriously affected,which means more stable output is needed.In this paper,finite element simulation and experimental methods are combined to study the transcutaneous energy transfer system based on implanted devices.The main contents are as follows:(1)The paper introduced the working principle of transcutaneous energy transmission system for implantable devices,through theoretical analysis for modeling and mathematical analysis of the performance of transcutaneous energy transmission system.(2)Based on the detachable transformer,the method of finite element analysis and experiment is used to study the inductance,coupling performance,transmission characteristics,loss analysis,the stability and applicability of percutaneous transformers.(3)Based on the multi-physical field coupling simulation of the electromagnetic field,temperature field and fluid-solid field,the finite element analysis of the temperature field of percutaneous transformers and fluid fields is carried out.(4)A two level stable voltage output system was designed and made to ensure the stability of the output power;(5)A wireless information transmission system was designed and the prototype experiment was carried out. |
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