STUDY OF DEVELOPING MAGNETIC PERMEABILITY MEASUREMENT FOR METAL

• Main Author: Sanding Putri, Fenudya
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/77338
• Institution: Institut Teknologi Bandung

Magnetic permeability is the ratio of the magnetic flux density (B) to the magnetic field strength (H) as a function of the magnetic field strength (H) in a material. Magnetic permeability is a measure of the magnetization response of a material due to exposure to a magnetic field. Information related to the value of the magnetic permeability of this material is very necessary. Some applications where magnetic permeability values are required are in industrial equipment, such as transformers, waterproofing coatings, and magnetic field antennas. However, the accuracy of the magnetic permeability measuring instrument depends on the range of magnetic permeability values of the materials used. Several magnetic permeability test methods can be performed using guided and non-directional measurement systems. However, this method requires high complexity, precise calibration, stability, special geometries, and a limited range of permeability measurements. In this study, a comparison of two models of magnetic permeability measuring instruments was carried out, namely model A and model B. The method of calculating the magnetic permeability of the samples used three methods, namely: comparison of the difference in magnetic flux density in the air gap, magnetic equivalent circuit, and finite element with input measurement results. The suitability of the three calculation methods was observed using finite element analysis. The sample used is an alloy metal. The results of the magnetic permeability measurements of the samples show the existence of a hysteresis phenomenon so that the magnetic permeability measurements on metals with low currents show a higher value. The relative magnetic permeability value of the sample was measured using model A with a strong current of 1 – 2 mA, twice that of measurement using model B. From the three methods used, it was concluded that measurement model A had a relative magnetic permeability value. better sample magnetic permeability measurement accuracy than model B