改进型回转器-电容非线性磁心仿真模型

Improved Gyrator-Capacitor Simulation Model of Nonlinear Magnetic Core

回转器-电容模型因具有建模方便、电磁信息完整、适于电-磁系统混合仿真等优点而适于仿真建模。本文提出的改进回转器-电容磁心模型,用非线性电阻来模拟磁滞特性,用非线性电容来模拟饱和特性。文中给出模型方程、模型参数计算及优化方法。仿真结果与手册中B-H曲线的一致性证明了建模方法的有效性。模型应用于400kHz Buck变换器及采用磁放大器的多路输出电源的系统仿真中,仿真结果与实验结果或者理论分析结果相一致,证明了所提模型的有效性。

The gyrator-capacitor model of the magnetic components has shown it＇s superiority in simulation for the electric and magnetic information integrity, convenience in the modeling and the mixed magnetic and electronic system simulation. This paper proposes an improved gyrator-capacitor core model, with a nonlinear resistor to simulate the hysteresis characteristic, with a nonlinear capacitor to simulate the core saturation. The model equation is presented in this paper as well as the parameter determination and optimization method. The simulation B-H curve comparing with that in datasheet proves the validity of the modeling method. The proposed simulation model is used in the system simulation of a 400kHz Buck converter and a multi-output converter with the magnetic amplifier regulator. The simulation results are consistent with the experimental results or the principle analysis, and verify the effectiveness of the proposed core model.