Design And Research Of1KW Solid Oxide Fuel Cell Inverter

As the problems about environmental population and energy crisis are becoming moreand more serious, people come to pay more attention about the new energy. And windpower, photovoltaic, nuclear power and fuel cells have got more and more attentions.Because of the features of high efficiency, low consumption and environment-friendly, fuelcells develop very fast in recent years and the most promising kind of fuel cells is the solidoxide fuel cell (SOFC). As the important part of the electronic control unit, the SOFC’sconverter has great impacts on efficiency and performance of the whole SOFC system.Thus, it has great theoretical and practical value to design the proper converter which cannot only ensure the normal operation of the SOFC, but also satisfy the demands of theelectronic control unit.This thesis introduces the fundamentals and characteristics of the fuel cell and solidoxygen fuel cell. Considering the output features of the SOFC system and the designingdemands of the DC-DC converters, this thesis adopts the typology of the boost push pullconverters. The thesis makes the compare of some typical typology of the DC-DCconverters, analyzes the operation of the converter in detail and gives out the designmethods of the main parameters. At last, the design of the boost push pull converters areillustrated and verified on a1KW experimental circuit.Based on the research of the boost push pull converter, the second level of the inverteris the full-bridge inverter. Use unipolar harmonic modulation in the generation of fullbridge drive signals, and realized it with a digital-analog combined circuit, which helps todouble the equivalent switch frequency, lower the switch cost, and achieve a better efficientin the end. A simulation is carried out to verify the design of the inverter.