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A Novel Approach for Developing An Efficient Boost Converter...

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作者： MOHSIN SAEED 广西大学

学位级别：硕士

For step-up applications,a conventional boost dc-dc converter is normally ***,its voltage gain is not enough for high-step-up *** obtain high-voltage gain,many solutions have been *** the simplest methods,the boost converter can be cascaded or stacked up on the other step-up ***,the cascade structure requires a lot of components as numerous as the count of the stages,which brings on low efficiency,complex circuit,and high ***,it is commonly integrated as a single-switch converter by sharing the main switch in order to reduce component count and circuit ***,the conduction loss and switching loss is increased because each stage of the inductor current flows in one common ***,the sort switching is needed to improve the power *** are several high-step-up stacked boost *** stacked-up structure is generally that both dc-dc converters are connected up in parallel by the coupled inductor to obtain high-voltage *** the output capacitor is connected in series,the voltage balance of the output capacitors should be *** there efficiency is not much high and also have some disadvantage so a new approach has been done in this thesis to overcome previous *** thesis focuses on the new approach to develop an efficient Boost Converter by using coupled *** order to eliminate voltage spikes,a buffer circuit is used in the *** coils generate leakage flux,and energy in the leakage flux causes voltage *** a high boost ratio,the active switches in the converter can maintain the proper duty cycle,which can significantly reduce voltage and current *** the main switch and the auxiliary switch can be turned on by the zero voltage switching,the switching loss is reduced,and the conversion efficiency is significantly *** this paper,an experiment was conducted by building a 200W boost converter *** results show th

关键词： low-input-voltage Boost Converter Coupled Inductor Photovoltaic System

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