A SPICE behavioral model for current-controlled magnetic inductors

A new SPICE-compatible behavioral model for magnetic controlled inductors was developed and verified experimentally. The new model is based on the gyrator-capacitor scheme in which the nonlinear permeance is emulated by a nonlinear capacitor that is built by using a ´transformer´ circuit. The gyrator-capacitor approach can be used to evaluate an arbitrary magnetic circuit, and the nonlinear ´transformer´ circuit makes possible the modeling the nonlinearity of the ferromagnetic core. The core saturation and hysteresis are reproduced by applying the core manufacturer´s data. A current-controlled inductor was used to test the proposed model. Close agreement was obtained between the simulation and experimental results.