Comparison Between Two Methods to Measuring the Magnetic Fulx Density in Soft Magnetic Materials at High Frequencies

In recent years, the application of nanocrystalline alloys in the field of electrical engineering is becoming more and more common. Nanocrystalline alloy materials have become one of the most important magnetic materials [1]. The nanocrystalline alloy has excellent electrical and magnetic properties and has been well developed in power, communications, medical, defense and civil products. At high frequencies, compared with the silicon steel sheet material for electrical workers, the nanocrystalline alloy not only has high permeability and low eddy current loss. The study of the magnetic properties of the nanocrystalline alloy, especially its properties in high-frequency rotating magnetic field, is of great significance for the use of this material. First of all, two-dimensional high-frequency rotating magnetic properties testing system is built. Secondly, two methods for measuring the magnetic flux density are compared, which are the probe method [2] and the capacitance method [3] Then, the magnetic properties of nanocrystalline alloys at high frequency were measured and compared respectively by the two methods of measuring the flux density. Finally, the advantages and disadvantages of the two methods were analyzed by the experimental results.