This article describes the methods of using composite magnetic soft materials in the railway transport and mechanical engineering. Soil state in two modifications of Fey and Fey are formed in the iron. Also in the text, the main temperature magnetic and non-magnetic properties of materials, and magnetic properties of materials at various different temperatures are highlighted. It has been noted that other material properties change at normal temperature also. In this regard, the study of new magnetic materials based on isolated iron particles is of interest to the theory of magnetism - the study of the mechanism of magnetic exchange through thin insulating layers with the formation of single-phase ferromagnetic ordering in a multiphase crystalline system.
A model of nucleation of cracks in composite materials with periodic structures is given. The model is based on the analysis of the cracking zone. It is assumed that the zone cracking is a layer of finite length with weakened bonds between the material particles. The interaction of pre-fracture zone surfaces is modeled by applying cohesive forces caused by bonds to pre-fracture zone surfaces. The analysis of the limit equilibrium of pre-fracture zones under transverse shear involves (i) a definition of relationships between cohesive forces and surfaces pre-fracture zone shear; (ii) the evaluation of displacement and stresses around the pre-fracture zone taking account of external loads and cohesive forces, also disposition of rigid inclusions; (iii) definition of the dependence of critical external loads under which the nucleation of a crack occurs on geometric parameters of the medium. The condition for the appearance of a crack is formulated taking account the criterion of the limit traction of the bonds in the material.
In this article, it is considered to analyze the reliability of TEM (traction electric machine) of electric locomotives of the railways of the Republic of Uzbekistan. To determine the damage, the most expedient and effective method will be to extend the life of the insulation by encapsulating local damage using impregnating materials and heat radiation. Over the past ten years, a stable tendency for insulation breakdown and turn-to-turn closure of the armature winding of the NB-514 type has been maintained in Unitary Enterprise (UE) “O'ztemiryo'lmashta'mir.” In this regard, a hypothesis was put forward that insulation breakdowns and turn-to-turn short-circuit of the armature winding most often occur due to intense heat and mass exchange processes in the insulation of the frontal parts of their windings with open section heads.
This article considers the issue of wide implementation in various branches of the national economy caused the intensive growth of electric machines production. Due to the high specific consumption of magnetic materials in the production of electric machines, a very promising direction is the development of waste-free technology of manufacture of magnetic cores and cores by methods of powder metallurgy. The use of powder metallurgy allows reducing losses of electrical steel and eliminating many labor-intensive operations, using powder metallurgy for electrical production, it is possible to obtain sufficiently high efficiency values and reduce hysteresis losses.
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