How can I identify the parameters for Jiles - Atherton model in Flux?

Yann_Le_Floch

The goal is to describe how to find Jiles-Atherton coefficients from experimental measurements in order to use it in the new hysteresis material model in Flux 12.1.

Data input

• B-H curves measured experimentally

Data output (python file)

• Jiles-Atherton coefficients:
• Ms: Saturation magnetization (A/m)
• a: Shape parameter (A/m)
• k: Pinning coefficient (A/m)
• c: Reversible wall motion coefficient
• Alpha: Mean field parameter

Requirements

• The following executable under Windows 64:
• MCR_R2015a_win64_installer.exe
• Find_Jiles_Atherton_Coefficients.exe

A dedicated interface has been generated under Matlab software in order to find easily JilesAtherthon coefficients from experimental B-H static cycles measured. To start the application:

1	Install “MCR_R2015a_win64_installer.exe”. This is done one time for a machine under Windows 64
2	Open “Find_Jiles_Atherton_Coefficients.exe” by a double click. The following interface appears:

To use the application:

1	Import of B-H curves measured by an experimental way
2	Fit B-measured with the B-simulated which is used in the optimization algorithm
3	Run the genetic algorithm
4	Play with parameters by hand (optional step)