TITLE:
Design Optimization for Generating a High Static Magnetic Field
AUTHORS:
Hussien A. Elharati, Salma Ahmed Alharati, Ziad Omar Wareg, Mohamed Amro Waregh
KEYWORDS:
Static Magnetic Field, Magnetostrictive Strain, Eddy Currents, Magnetic Field Strength, Finite Element Method Magnetics (FEMM)
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.11 No.4,
November
16,
2023
ABSTRACT: This paper details the creation of a device capable
of generating a powerful and consistent static magnetic field. This apparatus
serves the purpose of quantifying the magnetostrictive strain found in
materials like annealed cobalt ferrite and Terfenol-D, specifically those
shaped as cylindrical rods. In our investigation, the use of static magnetic
fields proves most advantageous. This choice is made to mitigate the generation
of eddy currents, which would inevitably occur if the magnetic field intensity
were varied. The fundamental idea behind this design involves employing a
C-shaped iron core constructed from low-carbon mild steel. On this core, three
coils are mounted, each capable of producing one-third of the required 9000
Oersted (Oe) magnetic field strength. The test specimen is situated within the “jaws” of the C-shaped core, thus completing the magnetic circuit. To manage the heat
generated by each coil, a cooling system consisting of copper tubes is
employed. These tubes facilitate the flow of air to dissipate the heat. To
model and predict the magnetic field strength produced by the coils, finite
element analysis (FEMM) software is utilized, and the results align closely with
the anticipated outcomes. This design effectively generates a robust and
unchanging magnetic field measuring a stable 9000 Oe in total. Consequently,
this equipment finds utility in characterizing the magnetic properties of
specific materials.