A new SPICE behavioral macromodeling method of magnetic components including the self-heating process

The aim of this paper is to present a new method of SPICE macromodeling of magnetic components, that is able to simulate both the minor and major hysteresis leaps, and considers as well the self-heating electrothermal effects. The electromagnetic and electrothermal laws are described with “in line equation” controlled sources, that form an electrical equivalent circuit of the global magnetic-electrical-thermal behavior of the magnetic component. The B-H loop is piecewise-linear approximated and therefore any kind of magnetic material can be modeled. The temperature and frequency dependencies of the B-H loop are directly specified in the macromodel with “look-up table” controlled sources. The resulting model is portable in all the modern SPICE simulators that support the behavioral modeling facilities, and it assures a higher accuracy and a better computational efficiency, with no convergence problems