Harmonic and DC Bias Hysteresis Characteristics Simulation Based on an Improved Preisach Model

Area of Science:

• Electrical Engineering
• Materials Science
• Computational Physics

Background:

• Electrical equipment frequently operates under challenging conditions, including harmonics and DC bias.
• Accurate simulation of soft magnetic material hysteresis is crucial for core loss calculation and equipment design.

Purpose of the Study:

• To develop and validate a parameter identification method for simulating asymmetric hysteresis loops using the Preisach model.
• To accurately simulate hysteresis characteristics of oriented silicon steel sheets under harmonic and DC bias conditions.

Main Methods:

• Experimental determination of limiting hysteresis loops for oriented silicon steel sheets.
• Numerical generation of first-order reversal curves (FORCs) with asymmetric characteristics.
• Establishment of the Everett function under varying DC bias conditions.
• Modification of the Preisach model's FORC identification method for improved simulation.

Main Results:

• The improved Preisach model effectively simulates asymmetric hysteresis loops under DC bias.
• Simulations accurately predict hysteresis characteristics of oriented silicon steel under harmonics and DC bias.
• Experimental validation confirms the effectiveness of the proposed simulation method.

Conclusions:

• The developed method provides a reliable approach for simulating magnetic hysteresis under complex working conditions.
• This research offers valuable insights for material production and the optimal design of electrical equipment.