About the article
A.N. BOLOTOV, Dr. Sc., G.B. BURDO, Dr. Sc.
The purposeful design of systems with magnetic-passive bearings is complicated by the lack of theoretical methods for calculating optimal magnetic systems that take into account the physical characteristics of the properties of high-coercive magnets. The paper solves the problem of calculating the force of magnetostatic interaction between two permanent cylindrical and annular magnets. The materials of magnets of the P-Co type, Fe-B, which have a demagnetization curve close to a rectangular one and sufficiently high values of coercive force, are considered. The Ampere hypothesis is used, according to which permanent magnets are represented in the form of solenoids equivalent to them. Ring magnets are equivalent to a system of two coaxial solenoids having the opposite direction of current in the windings. Analytical expressions for calculating the normal and tangential interaction forces of permanent magnets are obtained. The model can be used to determine the similarity criteria of magnetic bearing systems, calculate the optimal dimensions of permanent magnets, load capacity and stiffness of magnetic bearings.
magnetic field, design, magnetic-passive bearings, magnetostatic interaction