Energy Trasmission Research Of Transcutaneous Energy Transmission System Transformer For Artificial Heart

With the development on miniaturization,durability and low-resistance of the artificial heart, it might be used as widely as the artificial pacemaker. The original electric artificial heart is connected with the battery by the wires which will penetrate the skin. It has highly fatal infection. Using Transcutaneous Energy Transmission System (TETS) drive the artificial heart, there aren't any wire penetrates into the skin, which can prevent infection complications. This way is more comfortable and has greatly improved the life quality of the patients.In order to improve the efficiency of energy transfer system, the design and optimization of the contactless transformer are the keys to improve the system efficiency. In this paper, the contactless transformer of TETS has been researched. The working principle of the system, the development of the TETS and the difficulties on research are explained. By analyzing the mutual inductance model of TETS transformer, the equivalent circuit model of TETS is established.The factors affecting the transformer coupling are analyzed by the finite element software. This paper introduces a core type transformer which is suitable for in vivo implantation. The factors which affect the coupling character of this system have been studied. Optimization of this coil structure provides a basis to improve the efficiency of the transmission system. A variety of reactive compensation methods have been introduced. In view of the specific circumstances of TETS, the equivalent circuit has been analyzed, and the output impedance is considered for the system reactive power compensation methods. The simulation results show that when the power output is certain, the system reactive power compensation can be used to reduce the system electric power requirements.In the end, a transformer and its rectifier circuit for Left Ventricular Assist Device (LVAD) have been designed and simulated.