Small-size resonator and magnetic coupling resonance wireless energy transmission system

Abstract

Magnetic coupling resonance wireless energy transmission is a new technology which utilizing magnetic coupling resonance to achieve middle-distance electric energy wireless transmission, and has good application prospects. The invention provides a small-size plane-spiral resonance coil made by a printed board directly, the front face and the back face of the coil are all coated with copper, inductance generated on a front conductor layer and capacitance generated on an overlapped section of the front conductor layer and a back conductor layer form a needed resonator through a complex series-parallel connection circuit for energy transmission, and the size of the resonator is only 1.35 cm<3>. Through establishment of human head three-dimensional numerical model and implantation of a coil model into a body, a time-domain finite difference method is applied to the calculate head specific absorption rate and the electric-field magnetic field strength. Results show that when the magnetic coupling resonance wireless energy transmission technology is applied for the energy transmission of components implanted in the head, the I0g specific absorption rate (SAR) average value of the human head is 9.2627*10-6W / kg, the maximum value of root-mean-square of the electric-field magnetic field strength is respectively 4.64 V / m and 0.057 A / m, and the values are lower than the international safety limit standard.

Description

technical field [0001] The invention relates to a small-sized resonator and a magnetic coupling resonance wireless energy transmission system. Background technique [0002] With the development of science and technology, implanted electronic medical products with various functions continue to enter people's lives. They play a huge role in disease diagnosis, treatment, limb correction, rehabilitation, etc., bringing patients life It is convenient and even extends the life of the patient. [0003] Power supply technology is one of the most critical technologies among many technologies for implanting electronic devices. Although there are many possible power supply methods for implanted electronic devices, battery-powered power supply mode is generally used in various biological devices at present. Although the battery capacity is constantly increasing, there is always a risk of power depletion due to its lack of real-time energy supply function. Dilemma. Wireless power tran...

AI Technical Summary

Problems solved by technology

(2) Medium-distance wireless energy transmission can be carried out. Once the traditional method increases the transmission distance, the transmission efficiency will drop sharply

The magnetically coupled inductive coils of traditional implantable medical devices for percutaneous energy transmission are mostly wound by machines or manually, which has poor repeatability and difficulty in inductance control, and the coils with magnetic cores are large in size, which is not conducive to the miniaturization of the system

[0005] At this stage, Witricity wireless energy transmission technology is still in its infancy, and relevant theoretical and experimental research is still relatively lacking, especially for Witricity wireless energy transmission of implanted devices in the body, there are almost no relevant literature

Images