Magnetic Force Calculation between Magnets and Coils

Abstract

Applied magnetism has a wide range of applications in technology and industry. A significant magnetic force can be applied between two parts without any contact using coils and creating a magnetic field in the environment. It is also possible to strengthen the created magnetic force by placing different cores in the coil. The purpose of this research was to calculate the force between the coil and the coaxial magnet. In this system, a core with high permeability was considered for the coil. On the other hand, the distance between the coil and the magnet is such that when the coil is off, the effect between the coil and the magnet can be considered zero. The magnetic field produced by the magnet was also determined. Lorentz's force and potential theory was used to calculate the magnetic field and force. Note that the magnetic force between the coil and the magnet was only in the direction of the coil axis.

Increasing the operating depth of an autonomous underwater vehicle using an intelligent magnetic field

“…In this paper, the permeability of the magnet is considered equal to that of the air. Any current density in a given volume can be equated with a magnetization [10]. Therefore, a cylindrical magnet can be equated with a thin-walled cylindrical coil, and the magnetic relations can be written based on the equivalent coil as shown in Figure 2.…”

“…Therefore, the stress relations in this system are linear. Due to the linearity of the stress relations, the maximum allowable depth of the body can be calculated using the fit (10). Where hmax is the maximum allowable depth, σ1 is the Von Mises stress at a depth of one meter, and σmax is the maximum allowable body stress.…”

“…The underwater environment poses many challenges for researchers and submarine artisans [1], [2]. As the water depth increases, the pressure, temperature and pH of the water change, which can cause the vehicle to corrode, break, or even sink [1]- [10]. Therefore, the body of the underwater vehicle must be designed in such a way that in addition to high strength (for proper working depth and operating period), they also have the ability to maneuver properly so that they can cross through existing obstacles without any collision.…”

Numerical Simulation of Coal Microwave Heating and Evaluation of The Reliability of The Results By Changing The Parameters Affecting It

“…Solving any electromagnetic problem requires solving Maxwell's equations, which consist of four basic equations that link between the electric field E and the magnetic field B. Their differential form is as follows [7][8][9]:…”

“…Specifications of materials at 293.15K[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. In this table, (', ") and (μ', μ") stand for the (real part, imaginary part) of the relative permittivity and permeability, respectively.…”