Study and Design of Transcutaneous Coupling Power Supply Device Energy Transmission

With low energy transmission efficiency and low frequency of the transcutaneous coupling power supply device, factors affecting inefficiency are analyzed, formula under resonance is derived, relevant parameters of the primary and secondary coils are designed, and actually circuit is built in this paper. The circuit based on the coupling model of spatial isolated coils consists of the transmitting coil, the receiving coil and the load circuit. The distance between two transcutaneous coupling coils would be approximately equal to the thickness of the human’s skin, nominally between 5–15 cm. Through theoretical analysis and practical tests, the experimental result indicates that the maximum transmission efficiency is achieved 54.24% through a distance of 10 cm and at the resonance frequency of 300KHz, and the maximum transmission efficiency is achieved 19.536% under non-resonance, and optimal frequency region of high frequency carrier is 200KHz-400KHz. So transmission efficiency and frequency presented the design achieve requirements.