Modeling, analysis and design of integrated magnetics for modern power electronics circuits

Summary form only as given. In modern power electronic circuits, such as power-factor-corrected regulators and cascaded converters, multiple numbers of electronic switches and magnetic components are often used. A lot of research work has been carried out to integrate the electronic switches so as to reduce the number of switches required and the cost. However, not much systematic work on the analysis and design of integrated magnetics has been reported. In this research work, the authors take a fresh look at the modeling and analysis of magnetic components used in power electronic circuits. It is shown that by modeling MMF sources as voltage sources, flows of d/spl phi//dt as electric currents, reluctances as capacitances, and interfaces between magnetic entity and electric entity as two-port networks, the equivalent circuit of any complex integrated magnetic structure can be easily derived and combined with an electric circuit for analytical and simulation purposes. Typical examples of integrated magnetics are studied. The operation of an SSIPP (single-stage isolated power-factor-corrected power supplies) with a single magnetic component (functioning both as the inductor of the input boost cell and as the transformer of the output flyback cell) is examined. Experimental results are also reported.