| 用三角波电流励磁改进交流磁滞回线实验简 |
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| 引用本文： | 何森,张旭峰,姜卫,曹美珍,高永全.用三角波电流励磁改进交流磁滞回线实验简[J].大学物理实验,2014(1):62-64. |
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| 作者姓名： | 何森 张旭峰 姜卫 曹美珍 高永全 |
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| 作者单位： | 中北大学,山西太原030051 |
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| 摘 要： | 改进行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剖励磁．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舳的交流磁滞回线；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。
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| 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 |
Improving AC Hysteresis Loop Experiment Using Triangular Current Magnetic-exciting |
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| HE Sen,ZHANG Xu-feng,JIANG Wei,CAO Mei-zhen,GAO Yong-quan.Improving AC Hysteresis Loop Experiment Using Triangular Current Magnetic-exciting[J].Physical Experiment of College,2014(1):62-64. |
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| Authors: | HE Sen ZHANG Xu-feng JIANG Wei CAO Mei-zhen GAO Yong-quan |
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| Institution: | (North University of China, Shanxi Taiyuan 030051 ) |
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| Abstract: | 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. |
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| Keywords: | magnetic measurement AC hysteresis loop triangular wave excitation current differential magnetic permeability curve digital oscilloscope |
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