Journal: Volume 21, No. 3, 2016
Pages: 72 – 77
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Construction and study of physical model of stator winding insulation in electrical machines of printing complexes

V. Manko, V. Zotov

Abstract

Approximately 70 percent of generated electricity is transformed into mechanical one with the help of electric motors. Therefore, even a slight improvement of energy performance of induction motors in some measure helps to solve the problems not only of reduction of energy consumption but also of energy conservation and environment safety. The aim of the work consists in the construction and study of physical model of stator winding insulation with the determination of internal stresses in electric machines. When constructing a physical model of winding insulation only its main parameters and features should be taken. Constructed physical model allows to determine internal stress between two adjacent wires on the line connecting their centers. Voltage increases with decreasing of distance between the rods. This is because the process of winding insulation damage depends on such parameters as the factor of groove filling, wire diameter and enamel thickness. When being damaged the air and water vapor quickly penetrate under a polymer film, and this leads to the intensity of the process of insulation aging. The loss of film enamel adhesion to the wire is one of the factors that accelerates the process of winding insulation damage. Violation of mechanical integrity of the insulation creates additional processes that impair its performance, leading to breach. The influence of the strength ratio of impregnating material under a tension to the greatest extent manifests itself in the values of strength of 60-80 MPa

Keywords

inter-turn insulation, enamel film, polymer, adhesion, breakdown voltage, internal voltage

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Suggested citation

Manko, V., & Zotov, V. (2016). Construction and study of physical model of stator winding insulation in electrical machines of printing complexes. Bulletin of Cherkasy State Technological University, 21(3), 72-77.