engleski

Effects of voltage and heat overload on acceleration of insulating material degradation

Considerations based on the general form of equation of material degradation are made in order to compare the effects of specific voltage and thermal degradations and overloads on acceleration of electric machine insulating material degradation. Evaluation of aging is necessary for diagnostics and design of insulating systems. In the evaluation of insulating materials and systems, there are limits such as temperatures of thermal classes, temperature indices and profiles, which in a defined time give a defined degree of degradation. In practice, there are frequent and often necessary deviations from the specified stress, and there are quite different stress times and limits of allowable degradation.

electric machine; insulating system; material degradation

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