Improved gyrator-capacitor modeling of inductive components with a FINEMET-type nanocrystalline alloy core using SPICE

Power conversion devices, such as switching mode power supplies, require the use of a wide range of inductive components. Despite the intense development of advanced magnetic materials for the cores of such elements, SPICE models of these components are still inaccurate and oversimplified. In this paper, a SPICE model of inductive components is used to show that an improved gyrator-capacitor can be produced using cores made of both isotropic and anisotropic soft and magnetic materials -particularly nanocrystalline alloys. The implementation of a Langevin, function-based, magnetization curve model, as well as the application of a differential, evolution-based method of identification of model parameters, allowed for the effective modeling of inductive cores that were made from FINEMET-type nanocrystalline alloys. The modeling quality was quantitatively confirmed by measuring the R-squared coefficient, which exceeds 0.97 for driving frequencies up to 100 kHz. The high accuracy of the improved gyrator-capacitor SPICE model creates new possibilities for the development and optimization of power conversion devices.

Automated summary

This study proposes a method to model inductive components using SPICE models, which utilize isotropic and anisotropic soft magnetic materials, especially nanocrystalline alloys, to produce improved gyrator-capacitors. The implementation of the Langevin function-based magnetization curve model and the application of a differential evolution method for parameter identification allow for effective modeling of inductive cores made from FINEMET-type nanocrystalline alloys.