Abstract
Purpose: To analyze the processes of fatigue aging of the insulation of traction electric machines of locomotives under cyclic loads in operation. Methods: When solving typical problems of fatigue strength of insulating materials of electric locomotives, periodic loading cycles are used in the study. Results: The analysis of the processes of fatigue aging of insulation materials of electrical machines shows that the main parameters that increase the intensity of aging are the frequency and amplitude of the heating cycle. Thermomechanical stresses increase with rise of heating speed and temperature amplitude. Practical significance: Determination of the fatigue characteristics of the insulation material is very important when modeling its damage, which will increase the reliability of electric machines of modern locomotives at the stages of design, manufacture, modernization and operation.
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