Improving methods for identifying electric motor parameters in case of stator winding damage

Alyunov, A. N.; Vyatkina, O.S.; Ivanov, V. N.; Karpov, Yu G.; Melehin, V. F.; Andreev, A. M.; Mukhametova, Liliya

doi:10.1088/1755-1315/337/1/012070

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2020

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“…It is explained by warping, increased cracking, shrinkage, mechanical stress, destruction of molecular structures and thermal aging of insulation. Thermal drying methods are inconvenient, require dismantling and disassembly of EM, increased energy consumption and do not contribute to lower production costs [3,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Improving the efficiency of electroosmotic drying of electric motors insulation

et al. 2020

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The actual problem of electric motors (EM) operation associated with wetting of windings insulation is considered. A new method of EM drying based on electrokinetic phenomenon of electroosmosis was developed at the Department of Electrical Equipment of Vologda State University. It was shown that water molecules can take part in formation of non-mobile hydrated positively charged hydrogen ions. In this case, hydrogen ions become bound, lose their mobility and ability to take part in the process of electroosmotic drying (EOD). EOD efficiency is drastically reduced. It was proved that it is possible to prevent ion hydration, increase their mobility, penetration ability and, thereby, increase the EOD efficiency by applying a pulsed voltage component to the EOD process with a duty factor of 4. As a result, a new EOD method was developed using a pulsed voltage component that increases the speed of EM insulation drying by three times.

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Section: Introductionmentioning

confidence: 99%