Research on application of interpolation and fitting method in magnetization curve numeralization

摘要

It is of great significance for theory research and engineering application of electromagnetic device to digitize the magnetic curve of ferromagnetic material. A new method, which combines cubic spline interpolation and least square fitting in different interval, is presented in this paper. The simulation results suggest that the fitting relative error don't exceed 0.38%, and that the proposed method be well worth to popularize and apply.