Low Power Wireless Power Resonant Converter And Its Control Research

Introduced in this paper,from the aspects of market application development and current situation of the wireless charging technology,has been clear about the research goal and the significance of this article,on the basis of the resonance theory and the electromagnetic theory to analyze wireless charging system,determine the compensation structure of wireless charging system USES,according to the theory of electromagnetic energy transmission give out different core structure,and MAXWELL ANSOFT software simulation analysis,the simulation contrast to draw core structure are proposed in this paper is bigger than traditional E type magnetic core coupling degree,and set up under the closed loop control based on PSIM environment closed loop control system model of wireless charging,and under the condition of the coupling coefficient changes to circuit simulation system,the simulation results show that under the closed loop control of charging system in stable load voltage,good charging performance.After power wireless transmission system hardware circuit design,set up the experimental platform of the theoretical derivation and simulation analysis of the results of experimental verification.By experiment under the closed loop control system of wireless charging voltage stable,compared with the open-loop system does not have the function that adjusting the load voltage changes under the coupling coefficient changes,can not meet the requirements of charging very well,guarantee the battery life.Second core structure is different,the transmission efficiency of the wireless charging is different also,good prove that the results are given,the test concluded along the magnetic core structure has a good coupling coefficient,the horizontal displacement and the conclusion of the impact of small air gap spacing.