| As the electrical equipment is becoming increasingly popular as the energy equipment, Wireless Power Transfer technology, also known as the eight kind of the revolutionary technology changing the future world, has also been concerned. In recent years, Magnetically-Coupled Resonant Wireless Power Transfer(MCR-WPT) has been concerned too.Compared with magnetic coupling induction type and microwave type, the characteristic of it is high transmission efficiency and can keep security of the el-ectromagnetic. With the development of the technology of Magnetically-Coupled Resonant Wireless Power Transfer, it will promote the reform of the existing equipment and bring people a new life experience.This paper is about the research of the distributed structure of the MCR-WPT. The research mainly contains the following parts:Two analytical theories of Magnetically-Coupled Resonant Wireless Power Transfer are introduced: Coupled mode theory and circuit theory. The influenc-e factors of two kinds of theories are compared, and the various influencing factors of the circuit theory are introduced.This dissertation analyses of components in the MCR-WPT system, given a common half-bridge inverter circuit. By comparing various transmission structure classification, it is concluded that the mutual inductance is very small in the case of 4 times the radius of the coil. Therefore, the design of the coil distance can achieve the purpose of reducing cross coupling. The loads can be isolated by K-converter.Through the analysis and calculation, a new type of combined coil structure is designed, which can reduce the cross coupling effect. By means of equivalent circuit, the mutual inductance of the new combined coil structure is calculated, and the transmission efficiency of the transmission system is obtained.According to the theoretical calculation results, the experimental platform is designed and manufactured to light two LED lights, and charge a 5V/1A mobile phone with the transmission efficiency of 67%. |
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