Error correction and characteristic parameter identification of analytical Preisach hysteresis model under variable temperature
Increasing of temperature will affect the hysteresis characteristics of magnetic materials,and then alte-ring the performance of electrical equipment.At present,the Preisach model cannot effectively characterize temper-ature,resulting in significant errors in loss calculation results.Therefore,the degree to which the characteristic pa-rameters of the analytical Preisach model based on the Lorentzian function will affect the shape parameters of the hysteresis loop,such as saturation magnetic density,coercive force,residual magnetism is firstly analyzed in this paper.The changes in model parameters and material magnetic properties at different temperatures are studied.Based on the shape correlation and temperature correlation of the hysteresis loop of the model characteristic parame-ters,a temperature coefficient is introduced to correct the model characteristic parameters,and an analytical Prei-sach model is constructed under variable temperature conditions.A method for identifying the model parameters considering the influence of temperature is also provided.The final experiment measures the ultimate hysteresis loop of nanocrystalline alloys under variable temperature conditions.After comparing multiple sets of measured values with the corrected analytical Preisach model calculation values,it can be found that the average relative errors of the corrected model results at saturation magnetic density,coercivity,and remanence are 0.15%,2.21%,and 5.76%,respectively,proving the accuracy of the corrected model.
NETL
NSTL
万方数据
