Numerical Analysis And Experimental Study Of Non-radiative Magnetic Resonance Strongly Coupled Wireless Power Transfer System

Thanks to the exclusive contactless characteristics with the power feeding grid, contactless electrical energy transmission is a promising technique to improve the safety and reliability of power transmission, especially for some critical cases such as artificial heart, high dust and flammable and explosive environments. Therefore, increasing efforts have been devoted to develop contactless electrical energy transmission techniques. Today, contactless power transmission techniques can be grouped into three categories:the inductive coupling technology based on the transformer principle for short-distance transmission, the far-field radiation technology based on electromagnetic principles for long-distance transmission, and the resonant magnetic coupling technology based on the non-radiative resonant coupling for middle-distance transmission. Resonant magnetic coupling technology is based on the resonant coupling theory without any electromagnetic radiation, providing high efficiency energy transmission for middle-range distances. However, this technology is still in its infancy development stage, and there are still many open issues to be addressed.The mathematical model and method, the model parameter computation, the coupling mechanism, as well as the effect of the coil parameters on the performances of the resonator, of a non-contact power transmission system, are comprehensively investigated; Some specific coils are then designed and fabricated, and a experimental set-up is build; The performances of a prototype non-contact power transmission system are finally experimentally studied. The research findings would benefit the engineering application of the non-contact power transmission technique.