摘要
为了功率变换器中磁性元件的优化设计,需精确确定磁芯的幅值磁导率和增量磁导率。金属磁粉心是由金属磁粉颗粒、绝缘包裹以及空气(粘合剂)的组合体,其饱和磁感应强度高,磁导率低,阻抗角接近90度。因此测量磁粉芯的磁导率所需激磁源容量大(电压高,电流大),导致测量非常困难。为了快速便捷地测量磁粉芯的磁化特性,本文介绍了测量磁粉芯幅值磁导率和增量磁导率的直流测量方法,详细分析了直流测量法的工作原理和测量误差,通过实验验证了该方法的可行性。
In order to optimize the magnetic components in power converters, it is necessary to determine the amplitude permeability and the incremental permeability of the cores accurately. Metal magnetic powder Core is a combination of metal magnetic particle, insulating package and air (binder), its saturation flux density is high, the permeability is low, and the impedance angle is close to 90 degrees. Therefore, it is very difficult to measure the magnetic flux of magnetic powder Core (high voltage and current) because of the large excitation source. In order to measure the magnetization characteristics of magnetic powder cores quickly and conveniently, this paper presents a DC measurement method for measuring magnetic permeability and incremental magnetic permeability of magnetic powder cores. The theory of DC measurement method and measurement error are analyzed in detail and the feasibility is verified by experiments.
作者
张宇超
汪晶慧
陈为
ZHANG YU CHAO;WANG JING HUI;CHEN WEI(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350000)
出处
《磁性元件与电源》
2019年第10期142-144,150,共4页
Components and Power
关键词
磁粉芯
磁化特性
直流源
Magnetic powder core
magnetization characteristic
DC source
