用三角波电流励磁改进交流磁滞回线实验  

Improving AC Hysteresis Loop Experiment Using Triangular Current Magnetic-exciting

作　　者：何森[1] 张旭峰[1] 姜卫[1] 曹美珍[1] 高永全[1] 

机构地区：[1]中北大学,山西太原030051

出　　处：《大学物理实验》2014年第1期62-64,共3页Physical Experiment of College

摘　　要：改进了交流磁滞回线实验的励磁方法。研制了三角波电流交流恒流源驱动励磁线圈励磁,使软磁环形样品被交流磁化双向交替达到饱和,磁化场H的波形仍为三角波。维持三角波电流的周期和幅值不变,可使H变化的波形和变化的速率不变,可在H匀速变化的条件下观测样品的交流磁滞回线;能在磁化场相同的条件下观测不同样品的交流磁滞回线;还可直接观测样品的微分磁导率曲线。It ameliorated magnetizing method for AC hysteresis loop experiment, h researched AC con- stant current circuit of triangular wave is used to drive the magnetic-exciting coil. Even when the sam ple is AC magnetized to saturation,magnetizing field H waveform is still triangular wave. If makes the triangular wave current period and amplitude unchanged, the H changing rate shall be unchanged. In which case, the change regulation of the magnetic induction intensity in the sample can be observed un- der the H uniform change condition. AC hysteresis loop of different samples can he observed under the same magnetizing field conditions. The differential permeability curve can also be directly displayed.

关 键 词：磁性测量 交流磁滞回线 三角波励磁电流 微分磁导率曲线 数字示波器 

分 类 号：TM936[电气工程—电力电子与电力传动]