Abstract
The main part of technological processes in almost all industries, including those related to transportation, processing of mineral raw materials, cannot be implemented without the use of electric motors. The high reliability of these machines ensures trouble-free operation and guarantees the safety of people in these industries. The reliability indicators of electric machines depend on the insulation condition of the windings, which is largely determined by the saturation of the winding cavities with the impregnating compound that penetrated them during impregnation. Various manufacturing technologies of mica-containing electrical insulating tapes used as case insulation of coils of traction electric motors (TED) are considered. The main reasons for the failure of traction engines are presented. The existing types of insulation, their possible composition, features and applications are described. A brief description of the main methods of manufacturing electrical insulating mica-containing tapes is given, an assessment of the strengths and weaknesses of each of the technologies are presented. The methods of testing the initial semi-finished tapes and finished insulation are described.
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