High Precision Modeling of Nonlinear Lossy Magnetic Devices

The paper proposes a high efficiency and totally feasible tool that permits a rigorous study of magnetic devices, being intended firstly to the research and design activity. The method uses the most modern tools in circuit analysis, being a result of a long-time experience of authors. It deals with an accurate modeling that permits to find the distribution of magnetic fluxes everywhere in the core, at any time. The modeling is made through an equivalent electric circuit described by the same differential-algebraic equation system as the studied device in transient regime. Therefore, this circuit is analyzed using dedicated software, like SPICE. Such software has special capabilities to prevent convergence problems that usually occur in nonlinear DAE solving, as well as performing optimizations of certain parameters. The method permits not only the rigorous study of the magnetic device, but additionally a high precision analysis of complex equipments that contain magnetic devices