Design of the Stable Homogeneous Magnetic Field Calibration Device Generated by the Circular Coils

Abstract

This research relates to manufacturing stable homogeneous magnetic field strength generating equipment. It refers to the stable homogeneous magnetic field device’s design method in the theoretical method, finite element method, and experimental method, which is beneficial for generating the high homogeneous magnetic field strength. The circular coils produce the uniform magnetic field strength for a given number of winding turns and distance between the pair of coils. The number of turns of each coil and gauge of the wire for the winding was adjusted by the theoretical calculations. The coil’s current carrying capacity determines the high magnetic field strength. The uniformity of the magnetic field is based on the size and current density of the coils. This paper emphasizes the theoretical formula to calculate a couple of values and then apply a finite element method for the verification. The finite element method values are compared with the theoretical values for proofreading. The different current values are applied, showing the increase in the magnetic field strength from low to high current values. The coils are made using the same theory and finite element method parameters. The experimental values are similar to the simulation values, with a maximum error percentage of 3.08. The magnetic field homogeneity distribution at the middle of the two coils is less than 1% of error. The magnetic flux density in the center of the two coils is measured using a High-precision Gauss meter.