MnZn功率铁氧体的损耗特性研究  

Characteristics of the loss of MnZn power ferrite

作　　者：李海华 冯则坤[1] 何华辉 李海莉 

机构地区：[1]华中科技大学电子科学与技术系 [2]河北省衡水市财贸学校

出　　处：《华中科技大学学报（自然科学版）》2003年第12期48-50,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：研究了MnZn功率铁氧体在不同温度、频率和磁感应强度情况下的损耗特性 ,分析了磁滞损耗、涡流损耗和剩余损耗的机理 ,及这三种损耗与温度、频率和磁感应强度的关系 .结果表明 ,频率不高于 1 0 0kHz时 ,MnZn功率铁氧体的损耗是由磁滞损耗、涡流损耗组成 ,其中磁滞损耗在低温时占主要成分 ;随着频率的升高 ,即使在磁感应强度较低时 ,涡流损耗和剩余损耗的影响不容忽视 ,且两者都随温度的升高而升高 .The characteristics of the loss of MnZn power ferrite was studied in different temperature, frequency and magnetic induction. The mechanism of Hysteresis loss, eddy loss and residual loss were investigated. The relationship between the loss and temperature, frequency and magnetic induction was studied. The results showed that when the frequency less than 100*!kHz, the total loss was made up of the hysteresis loss and the eddy loss, and the hysteresis loss was the chief proportion; With an increase of the frequency and temperature, the eddy current loss and residual loss contributed to the total loss at the low induction.

关 键 词：MNZN功率铁氧体 损耗特性 磁滞损耗 涡流损耗 剩余损耗 温度 频率 磁感应强度 

分 类 号：TM277[一般工业技术—材料科学与工程]