* known methods for calculating the losses in the laminated cores, for example, according to the Krug formula, in conditions close to the saturation of the material make a significant error both at the industrial and higher frequencies of field change;
* two-dimensional approximation of the magnetic field allows considering the effect of eddy currents in the laminated cores by converting the value of the resistivity of the material.
The aim of the article is to determine the effect of TG stator core assembly technology to its reliability and the definition of the possibility extending the service life (impact gluing the core sheets on its bending stiffness, impact of pressing forces on the relative movement of the package sheet and wear of the insulating layer between sheets of the laminated core).
Let us allocate part of the laminated core package, where several floors (joints) fall.
If laminated core packets are not glued and are pressed only by uniform pressure [p.sub.0], the bending deformations cause the slip of sheet steel in the area of junctions (Fig.
The results of the calculation of the flexural deformation of the laminated core of turbogenerator based on the compliance of the insulating cover sheet active steel are obtained.
The selection of the compaction pressure of the laminated core should be carried out based on the possible slip of sheets when vibration occurs, also taking into account knowledge of strength the adhesive layer and safe limits of relative sliding.
* the relative sliding of the laminated core sheets exists on the width not more than 2 mm ([b.sub.s] < 2 mm) in the joint area when pressure of pressing is [p.sub.0] [greater than or equal to] 1 MPa and a amplitude of radial oscillations of vibration that do not exceed A [less than or equal to] 20 mkm.
Gluing laminated core sheets reduces the impact of this phenomenon.
Wear insulating layer between sheets of laminated core can be neglected, because: