Research On Wireless Energy Transmission System Based On Phase-shifted Full-Bridge Soft-Switching Converter

As the worldwide energy shortage and the demand of all kinds of smart phones and other mobile devices increasing, the traditional way of charging cable is not adapt to the modern way of life, the demand for energy wireless charging technology become more heavily all over the world. Energy wireless charging technology is mainly based on non-contact transmission way of energy, compared with the traditional way of cable transmission, its security and practicality is higher.Firstly, this dissertation through to analysis and study of the current mainstream wireless charging way, choose a suitable wireless charging methods for this dissertation, that is coupled magnetic resonance wireless power transmission. On this basis, in order to reduce the switching loss of power tube and the influence of electromagnetic interference, this dissertation will combination with phase-shift full-bridge soft-switching technology and coupled magnetic resonance wireless power transmission technology, combined with their advantages, studied theoretical of the principle of experiment system, and given corresponding calculation formula.Secondly, this dissertation first through the Ansoft finite element simulation software, simulation of transmitter coil and the receiver coil, through the analysis of the results of simulation and calculation, it is concluded that the efficiency influencing factors of wireless energy transmission system, by incorporated repeating coil and planar core simulation, concluded the effective way to improve the efficiency of wireless energy transmission. Then equate transmitter coil and the receiver coil to coil inductance and use the power simulation software Saber, emulation of the wireless energy transmission system based on phase-shifted full-bridge soft-switching, through the phase-shift full-bridge circuit waveform and achieve soft turn-off waveform figure, to realize the correctness of the theoretical analysis is verified.Finally, in order to verify the correctness of the simulation waveform, operational principle and experimental result will be presented with a 1.2kW experimental prototype using the UCC3895 as the core. The experimental results show that the prototype as well, not only realized the full-bridge phase-shift circuit soft-switching, but also improve the transmission efficiency of wireless energy transmission system.