Design,Comparison And Optimization Of Two-Dimensional High-Frequency Rotating Magnetic Characteristics Sensor

Since the 21 st century,the application of magnetic materials in the field of electrical engineering has become more and more common,and it is closely related to all aspects of information technology,national defense technology and national economy.Among them,nanocrystalline alloy materials,as emerging materials,have higher saturation magnetic flux density,higher magnetic permeability and lower loss at high frequencies than conventional materials.Due to its excellent electrical and magnetic properties,nanocrystalline alloys have broad application prospects in the fields of power equipment,medical and defense.Therefore,it is of great significance to study its magnetic properties.In this paper,one-dimensional highfrequency magnetic properties measurement experiments have been carried out on nanocrystalline alloy and soft magnetic composite material,and preliminary measurement results have been obtained.In this paper,a two-dimensional new flux density sensor has been designed,and a physical model of B-H composite sensor has been made.The twodimensional magnetic properties measurement experiments of nanocrystalline alloy have been carried out.The main work is as follows:1.Briefly introduce the development history and research status of nanocrystalline alloys.The development history of magnetic property measurement is briefly introduced,including one-dimensional magnetic property measurement,two-dimensional magnetic property measurement and three-dimensional magnetic property measurement.Among them,There are three classic measurement methods for one-dimensional magnetic property measurement.Their application range and measurement principle are expounded.And the advantages and disadvantages of three classical methods are summarized.Several typical two-dimensional magnetic property measuring devices are listed,and some research results on three-dimensional magnetic property measurement are briefly introduced.2.The one-dimensional magnetic properties of nanocrystalline alloys and soft magnetic composites have been measured by the annular sample method.The MATLAB GUI was used to write a one-dimensional magnetic characteristic measurement data processing program,which realized automatic data processing and automatic image rendering.Finally,a brief analysis and summary of the experimental measurements has been made.3.Comparison of three methods of magnetic flux density sensor: the coil method,the probe method and the patch method.The coil method needs to punch holes in the sample plate.This method is not very suitable for fragile nanocrystalline alloy samples,which can cause damage to the sample plate and affect the accuracy of the measurement.In this paper,two new B-H composite sensors have been made by means of the probe method and the patch method.After calibrating the sensors,the results of the two sensors have been compared.4.The one-dimensional and two-dimensional magnetic properties of nanocrystalline alloy square samples were measured using a two-dimensional high-frequency magnetic property measurement system with a novel patch type B-H composite sensor.The 2D magnetic property measurement data processing program was written by MATLAB GUI,which realized automatic data processing and automatic image rendering.Finally,a brief analysis and summary of the experimental measurements has been made.