Study of the deterioration of conductive coatings used in form-wound motor coils by fretting wear tests

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Resumen

Many of the failures in rotating electrical machines can have mechanical origin. One of these conditions is the vibration of the windings, something that can occur when the coils become loose in the slot. In medium voltage form-wound coils, a small oscillating movement can lead to the wear by fretting of the conductive armor coating in contact with the stator core wall. Once the conductor armor coating is completely removed in some portions of the coil surface, partial discharges appear, either inside of the slot or at the slot end. In this work the fretting wear phenomena on the conductive armor and stress grading coatings is investigated by using a tribotester with a ball-on-flat contact geometry, built for this purpose. The results show the friction coefficients achieved during the tests, also the surface damage caused by this phenomenon is presented for a commercial conductive armor coating.

Idioma originalInglés
Título de la publicación alojada2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016
EditorialInstitute of Electrical and Electronics Engineers Inc.
Páginas355-359
Número de páginas5
ISBN (versión digital)9781509023547
DOI
EstadoPublicada - 17 ago. 2017
Evento2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016 - San Francisco, Estados Unidos
Duración: 5 jul. 20169 jul. 2016

Serie de la publicación

Nombre2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016

Conferencia

Conferencia2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016
País/TerritorioEstados Unidos
CiudadSan Francisco
Período5/07/169/07/16

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