On the Issue of Comparing Mathematical Models of Magnetic Fields of Permanent Magnets in the Shape of a Rectangular Parallelepiped Used in Magnetostrictive Devices

Article is devoted to the issue of calculating the projections on the 0Z axis of magnetic field strengths created by permanent magnets of the rectangular parallelepiped shape. The analysis of the main factors influencing the formation of magnetic fields in magnetostrictive transducers of displacements when using permanent magnets of rectangular parallelepiped shape is considered. The influence of each factor is analyzed. Theoretical and practical investigations of approximate and exact mathematical models of calculation of projections on the 0Z axis of magnetic field strengths created by permanent magnets of rectangular parallelepiped shape are carried out. Computational experiments have been performed to investigate the influence of parameters of permanent magnets of the rectangular parallelepiped shape on their amplitude values of projections on the 0Z axis of magnetic field strengths. Since the calculation formula of the magnetic field, which can be used for calculations of permanent magnets of the rectangular parallelepiped shape, depends on its dimensions and ratios of length and width to thickness of the permanent magnet, recommendations on the use of exact and approximate calculation formulas are given.