一种基于冻结磁导率的高频变压器直流偏置电流计算方法  

A calculation method for high frequency transformer based onfrozen permeability method

作　　者：田煜 金平[1] TIAN Yu;JIN Ping(School of Energy and Electrical Science,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100

出　　处：《电工电能新技术》2021年第2期33-40,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51407061)。

摘　　要：提出了一种用于计算高频变压器直流偏置电流的通用方法。与传统的偏置计算相比,取消了偏置工作点附近的磁滞回线的系数拟合过程,在冻结磁导率方法的基础上,直接通过基本磁化曲线,建立一次侧电流和二次侧感应电压的对应关系,进行直流偏置电流计算。对于磁化曲线铁心磁滞回线的影响,在铁磁材料的非饱和区引入矫正系数。建立了变压器测试平台,通过直流偏置电流实验,将模型预测结果与实验测量结果进行比较,可达到较好精度。In this paper,a DC-bias current calculation method for high frequency transformer is proposed,which provides a universal method for DC-bias current prediction.Compared with the traditional bias calculation,the coefficient fitting process of hysteresis loop near the bias working point is cancelled.On the basis of frozen permeability method,the corresponding relationship between primary side current and secondary side inductive voltage is established,and the DC bias current is calculated.The correction coefficient is introduced for the effect of magnetic hysteresis loop.A transformer experimental platform is established,and through the DC bias current experiment,the model prediction results are compared with the experimental results,which can achieve better accuracy.

关 键 词：直流偏置电流 预测模型 高频变压器 冻结磁导率 

分 类 号：TM433[电气工程—电器]