Development of Single Sheet Tester for Measuring Magnetic Characteristics of Amorphous Magnetic Metals

为了向IEC提出“电力设备用非晶态金属磁特性标准测量方法”草案，研究了地磁、剩磁等因素对测量磁特性的影响。主要研究结果如下：1.地磁场对测量磁特性的影响比较了磁屏蔽室内和外的测量结果。结果表明，如果样品的纵向与地磁方向成直角，磁屏蔽室外的双轭式单片测试仪的性能是可以接受的。2.磁轭中的剩磁对测量磁特性的影响结果表明，水平轭式单片测试仪中的剩磁影响大于水平轭式单片测试仪中的剩磁影响。3.绕组阻抗对磁通波形畸变的影响 ...更多信息 研究了单板试验机一次绕组阻抗和磁通补偿用互感器阻抗对磁通波形畸变的影响。4.波形控制方法的改进为了减少数字反馈的迭代次数，提出了一种新的波形控制方法，即利用单片测试仪的等效电路来估计施加电压的波形。用这种方法测量磁特性的时间大大缩短。5.测量的相互比较进行了日本非晶磁性材料磁特性测量的相互比较。各研究所的结果差异很大，目前正在研究对策，并试图通过上述研究改进现行JIS标准。各国之间的相互比较是为了提出一个新的IEC标准。少

In order to propose a draft of "Standard measuring method of magnetic characteristics of amorphous metal for power apparatus" for the IEC,effects of geomagnetism and residual magnetism, etc.on measured magnetic characteristics were investigated. The results obtained can be summarized as follows :1.Effect of Geomagnetism on Measured Magnetic CharacteristicsThe results measured inside and outside a magnetic shielding room were compared with each other. It was shown that if the angle between the longitudinal direction of the specimen and the direction of geomagnetism is perpendicular, the performance of the double yoke type of single sheet tester outside the magnetic shielding room is acceptable.2.Effect of Residual Magnetism in the Yoke of Measured Magnetic CharacteristicsIt was shown that the effect residual magnetism in the horizontal yoke type of the single sheet tester is larger than that in the vertical one.3.Effect of Impedance of Winding on Distortion of Flux WaveformThe effects o … More f the impedances of the primary winding and the mutual inductor for air-flux compensation of the single sheet tester on the distortion of the flux waveform were investigated. It was shown that the layrs which compose the winding should be connected in series.4.Improvement of Waveform Controlling MethodIn order to reduce the number of iterations of digital feedbacks, a new controlling method for the waveform which estimates the waveform of the applied voltage using the equivalent circuit of the single sheet tester was developed. The time for measuring magnetic characteristics has been considerably reduced by using this method.5.Intercomparison of MeasurementsA Japanese intercomparison of measurements of the magnetic characteristics for amorphous magnetic material was carried out. The results of the institutes have been considerably different and the counter plan is being investigated now.Now, it is being tried to improve the existent JIS standard by the above investigation. The intercomparison between various countries is prepared in order to propose a new IEC standard. Less