Design Of High-Frequency Power Supply In Wireless Power Transmission System Based On The Electromagnetic Resonance

Over the years,to achieve the wireless transmission of electrical energy has been the dream pursued tirelessly of many scholars at home and abroad. Although it has made great strides in the field of wireless transmission of signals, the research of wireless power transmission has made little progress. As early as 1894, Tesla(Nikola Tesla) lighted an incandescent wirelessly on the use of the principle of electric field induction in the laboratory. The research has stalled for a long time since,but now, wireless power transmission becomes a hot research for scientists again.Currently, wireless power transmission is mainly based on one of the three principles: electromagnetic radiation, non-radiative electromagnetic induction(transformer principle), non-radiative electromagnetic resonance. This thesis proposed a complete solution targeted at one of technical problems in non-radiative electromagnetic resonance wireless power transmission – the design of high-frequency power supply. And,combined with the concrete application of wireless power transmission, we proposed a resonant frequency automatic tracking high-frequency power supply design and another self-starting resonant frequency automatic tracking high-frequency power supply design.First, using the SimPower Systems toolbox in Simulink,we made a simulation study and theoretical analysis about the principle of electromagnetic resonance wireless power transmission to determine design requirements and basic parameters of the object of study; Then, the principles of three solutions mentioned above were discussed respectively,circuits were designed relying on Multisim circuit simulation software,Schematics and PCBs were drawn aided by Altium Designer, producing a complete circuit entity. Finally, the feasibility and stability of the three solutions were verified by experiments.Generally, The frequency of traditional high-frequency switching power supply is approximate 20 k Hz. While this paper implemented the high-frequency power supply design which aimed at switching frequency 500 k Hz ~ 1MHz, and proposed a new frequency automatic tracking design and a self-starting design.