Design Optimization for Generating a High Static Magnetic Field  

作　　者：Hussien A. Elharati Salma Ahmed Alharati Ziad Omar Wareg Mohamed Amro Waregh Hussien A. Elharati;Salma Ahmed Alharati;Ziad Omar Wareg;Mohamed Amro Waregh(Department of Electrical Engineering, Higher Institute of Science and Technology, Tripoli, Libya;Physics Department, Ministry of Education, Tripoli, Libya;Higher Institute of Science and Technology, Nalut, Libya)

机构地区：[1]Department of Electrical Engineering, Higher Institute of Science and Technology, Tripoli, Libya [2]Physics Department, Ministry of Education, Tripoli, Libya [3]Higher Institute of Science and Technology, Nalut, Libya

出　　处：《World Journal of Engineering and Technology》2023年第4期793-806,共14页世界工程和技术（英文）

摘　　要：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.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.

关 键 词：Static Magnetic Field Magnetostrictive Strain Eddy Currents Magnetic Field Strength Finite Element Method Magnetics (FEMM) 

分 类 号：TG1[金属学及工艺—金属学]