Proposal for a Simulation-Based Measuring Method of Magnetization Curves Using Finite Element Analysis

The accuracy of magnetostatic finite element simulations depends largely on the quality of the magnetization curves used to model ferromagnetic materials. Established measuring approaches either suffer from a time-consuming preparation of samples or a reduced accuracy in measuring the sample´s field strength. Therefore, a simulation-based approach was developed that replaces the problematic field strength measurement with a finite element simulation while maintaining a convenient sample geometry. The proposed method´s requirements and feasibility were discussed using a simple magnetic circuit. The method´s accuracy in determining a correct magnetization curve was shown on a closed simulation model using a known magnetization curve as reference. Influences of measurement and simulation errors were determined and compared with the typical simulation accuracies.