Derivation of a transformer low frequency equivalent circuit using electromagnetic field simulation (original) (raw)

Equivalent circuits of electromagnetic devices are an efficient alternative to full transient EM analysis especially when phenomenon such as inrush currents are investigated. The time-constants in such cases generally, for a 50 Hz transformer, are in the order of several minutes hence rendering full transient EM simulation time consuming. On the circuit level, the simulation time involved is a fraction of the EM transient case. Furthermore, parametric analysis may take place in the circuit simulation allowing what-if scenarios to be tested e.g. effect of system impedance on inrush behaviour.This article shows the application of the CST EM STUDIO® (CST EMS) Magnetostatic solvers within the System and Assembly Modeling (SAM) framework to the emulation of two standard transformer tests for the extraction of T-equivalent circuit parameters at 50 Hz.