Research Of The Hysteresis Model About Ferromagnetic Material

There are many objects which contain ferromagnetic material in power system, such as dynamotor, transformer and so on. The magnetization and hysteresis of ferromagnetic material affects the working performance of the electric object. The hysteresis model describes the characteristic.The text mostly study the hysteresis model of the ferromagnetic material.The text analyses the hysteresis of the ferromagnetic material, and analyses the familiar hysteresis model, then bring a new hysteresis model. We can gain the parameter from a group of (B,H) by the least squares fitting method, then, the full hysteresis model is given. When comparing the drawing from the hysteresis model to the measuring drawing, we can find that the hysteresis model approach the reality exactly.The text study the mathematic method in electromagnetic, and mainly explain the finite element method. The text describe the theory of the finite element method, the cell dividing and constructing interpolation function, the forming and solution of finite element method equation.The text give the numerical analysis using the new hysteresis model. The new hysteresis model can settle the electromagnetic problem. The new model is very easy, and can be solve the electromagnetic problem which contained the infection of the hysteresis. Last, an example about the analysis in the magnetic fields influenced by the hysteresis is presented and settled.Last, the text studies the influence of hysteresis on the circuit and the magnetism route. The magnetization current of the AC iron center is not the...