Comparison of Inductor Models Used in Analysis of the Buck and Boost Converters

The inductive devices with the ferromagnetic core are widely used in many electronic circuits, for example in the buck and boost converters, to store magnetic energy. They should be treated as nonlinear devices, and the nonlinearity of their characteristics arises from the dependence of inductance on current. In the paper the influence of the nonlinear and linear inductor models on some selected characteristics of the above-mentioned converters is compared. As a tool to compute these characteristics SPICE was used. Primerjava modelov induktivnosti uporabljenih pri analizi konverterjev Kjučne besede: DC-DC konverterji, SPICE, modeli induktivnih komponent Izvleček: Induktivne komponente na feromagnetnih jedrih pogosto uporabljamo v mnogih elektronskih vezjih, npr. v DC-DC konverterjih, za shranjevanje magnetne energije. Potrebno jih je obravnavati kot nelinearne elemente , saj njihova nelinearna karakteristika izhaja iz tokovne odvisnosti induktivnosti. V prispevku primerjamo vpliv linearnih in nelinearnih modelov induktivnosti na delovanje konverterjev. Pri analizi smo uporabili program SPICE. UDK621.3:(53+54+621+66), ISSN0352-9045 Informacije MIDEM 38(2008)1, Ljubljana