Effective Nonlinear Magnetic Curves Calculator

Application ID: 30941

This app demonstrates the following:

  • Importing measured data from a text file
  • Handling measured data using methods
  • Exporting the results to a text file
  • Exporting the results as COMSOL Material Library file.

The app is a companion to the Effective Nonlinear Constitutive Relations functionality. Magnetic-based interfaces in the AC/DC Module support the Effective HB/BH Curve material model that can be used to approximate the behavior of a nonlinear magnetic material in a frequency domain simulation without the additional computational cost of a full transient simulation.

The Effective HB/BH Curve material model requires the effective Heff(B) or Beff(H) relations defined as interpolation functions. This utility app can be used to compute the interpolation data starting from the materials H(B) or B(H) relations.

The interpolation data for the H(B) or B(H) relations can be imported from a text file or entered in a table. The app then computes the interpolation data for the Heff(B) or Beff(H) relations using two different energy methods. The resulting effective material properties can be exported as a COMSOL Material Library file and be further used in a model with the Magnetic Fields interface.

This application example illustrates applications of this type that would nominally be built using the following products: