Research On One-cycle Controlled Interleaved Parallel Buck Converter Under Input Voltage Fluctuations

The interleaved parallel Buck converter is on the basis of the traditonal Buck converter.The interleaved parallel technology can achieve a more efficient power conversion,we can use the interleaved parallel technology in some situation where we want to get high quality output voltage.The interleaved parallel Buck converter is well adapted to the trend of the small volume, small weight and high power density of the switching power supply.The one-cycle control method is widely used in the circuits to suppress the input voltage interference because of it has the advantages of fast response speed,small volume,simple operation and reliable.In this paper,I mainly study the output of the interleaved parallel Buck converter under the condition of input voltage fluctuation and also use the one cycle control technology to suppress the effect that input voltage fluctuation had done for the system.This paper analyzes the one-cycle controlled the interleaved parallel Buck converter under the input voltage fluctuation and the further application in inductively coupled power transfer system.It can be used as a control strategy in inductively coupled power transfer system under the input fluctuation.The paper synthetically analyzes the interleaved parallel technology because it can effectively reduce the ripple of output voltage and current size,it also can reduce the switch stress and increase the frequency of the system so it is helpful to reduce the volume of the system.The interleaved parallel Buck converter and traditonal Buck converter has carried on the comparison and analysis.In order to further analyze the stability of interleaved parallel technology,I focus on the system features under the condition of input disturbance.I decided to use the one cycle control technology to control the system according to analysis about the characteristic of the interleaved parallel Buck under the disturbance condition.This paper puts forward that inductively coupled power transfer system's intput control strategy based on the advantages of the interleaved parallel Buck converter.I finally confirmed the inductively coupled power transfer system topology structure through theoretical analysis and simulation.Then on the research and analysis in this topology..In this paper I further analysis the input control strategy of the inductively coupled power transfer system under the input fluctuation.Using the one-cycle control technology to verified the input control strategy of the inductively coupled power transfer system is correct.The paper using the point that one-cycle control method in the paper to design the main circuit and control circuit to complete and achieve the waveform acquisition.At last I verify the analysis in this paper is feasible based on the waveform that were collected on the experiment.