基于Jiles-Atherton模型的四级串联FLTD电路仿真

Simulation of FLTD With a Four Stages in Series Circuit Based on Jiles-Atherton Model

磁芯的动态特性对模拟快脉冲直线变压器驱动源(fast linear transformer driver,FLTD)在异常工况下的输出波形有很大影响,为更贴切地模拟FLTD放电过程中磁芯的磁化过程,建立了耦合Jiles-Atherton磁滞模型的四级串联FLTD电路模型,根据实测磁滞回线拟合了磁滞模型参数,将FLTD支路自放电的仿真与实验波形对比,验证了模型的有效性。模型所包含的磁滞回线特征很好地改善了仿真中自放电电压波形在第一个峰值之后的变化趋势,同时给出了放电过程中磁芯的励磁状态变化过程,为预测和分析FLTD故障提供了一种更准确的数值模型。

To simulate the magnetization process of magnetic core during the discharge of the fast linear transformer driver(FLTD),a four-stage in series FLTD circuit model coupled with Jiles-Atherton hysteresis model is established.The hysteresis model parameters are fitted according to the measured hysteresis loop.The simulation of FLTD discharge is compared with the experimental results,which verify the effectiveness of the model.Hysteresis loop features of the model improve the variation trend of the self discharge voltage waveform after the first peak value in the simulation.At the same time,the excitation state of the magnetic core during the discharge process is given,which provides a more accurate numerical model for predicting and analyzing FLTD faults.