Design and Analysis of a Novel Two-Dimensional High Frequency Magnetic Tester for Nanocrystalline Alloy Material

To expend the engineering application of novel high frequency magnetic materials, magnetic properties of these materials in different magnetic fields need to be further studied. This paper proposes a novel high frequency two-dimensional (2-D) magnetic properties tester for high frequency magnetic materials, such as nanocrystalline alloy. The magnetic field distribution on the specimen is simulated to verify the theoretical feasibility and rationality of this tester by the finite element software. Considering the dimension and physical properties of specimen, the improved B-H sensing structure is designed that can extract the stable inducted voltage through many experiments and comparisons. Moreover, the frequency-domain feedback control system is used to obtain the desired waveform. Based on the experimental data, measuring error of the tester is systematically analyzed. The losses of square nanocrystalline specimen under alternating magnetization condition are compared with the official data at 20 kHz. The results show that the measurement of the tester has well precision. Finally, the 2-D rotational magnetic properties of nanocrystalline alloy are preliminary measured.