Research On Combine Magnetic Integrated High Gain DC Convert Based On Voltage Doubling Unit

With the global energy crisis and the increasingly serious environmental pollution problems,the development of new sustainable energy has achieved remarkable achievements and economic benefits.With the promotion of new energy research on a global scale,many universities and research institutes have done a lot of research on how to improve the voltage gain and efficiency of DC converters.Non-isolated high-gain DC/DC converters have been studied.One of the hot spots.This paper introduces the development status of traditional DC-DC converters;and summarizes several ways to improve voltage gain.Through the research of the literature,this paper first combines the active switching inductor and the post-stage voltage doubling unit,and magnetically integrates the energy storage inductor in the active switching inductor to obtain a combined magnetic integrated high gain DC converter based on voltage doubling unit..The main working modes are analyzed,and the voltage gain and the voltage stress expression of the switching device are given.Then in order to further improve the voltage gain of the converter,the article has carried out various expansions on the combined magnetic-integrated high-gain DC converter based on double voltage unit: The post-stage voltage doubling unit is combined;the energy storage inductor in the active switching inductor is replaced by a switching inductor and a quadratic switching inductor;and the expanded new converter is magnetically integrated.The main working modes are analyzed,and the voltage gain and voltage stress expression of the switching device are given,and the ripple analysis is performed.According to the design criteria of the coupled inductor,two magnetic components are designed.The converter was simulated and verified by PSIM simulation.Finally,the experimental prototype was made to verify the theoretical analysis.In the experiment,two different coupling modes of inductor current waveform,output voltage waveform and main switching tube voltage stress waveform were collected.The experimental results show that the proposed converter has the advantages of significantly improved voltage gain,lower switching tube stress,lower current ripple and higher power density.