Title :
Twisted pair specimens insulated by conventional and nanocomposite enamel: Life curves and PD patterns
Author :
Guastavino, Francesco ; Ratto, Alessandro ; Coletti, Gianfranco
Author_Institution :
Electr. Eng. Dept., Univ. of Genova, Genoa, Italy
Abstract :
This work concerns the comparison between the behaviour of winding wires insulated by a conventional organic enamel or by a nanocomposite enamel, when subjected to the action of surface partial discharges. Some aging tests were carried out applying a 1500 Hz sinusoidal voltage with different amplitudes. The outcome was summarized through lifetime plots. During the tests, partial discharges (PD) patterns were also acquired. Analyzing the lifetime curves and the PD patterns obtained from the monitored PD activity, it was possible to point out some interesting features and new factors that allowed to arrive at a correct comparison between the two different insulating systems involved.
Keywords :
ageing; electric motors; enamels; insulating materials; machine windings; nanocomposites; partial discharges; PD patterns; frequency 1500 Hz; insulating systems; life curves; nanocomposite enamel; random wire wound motors; sinusoidal voltage; surface partial discharges; twisted pair specimens; wires insulation winding; Aging; Breakdown voltage; Cable insulation; Dielectrics and electrical insulation; Partial discharges; Polymers; Temperature; Testing; Wire; Wounds; PD patterns; lifetime plots; nanocomposite enamel; partial discharges activity;
Conference_Titel :
Nanotechnology, 2009. IEEE-NANO 2009. 9th IEEE Conference on
Conference_Location :
Genoa
Print_ISBN :
978-1-4244-4832-6
Electronic_ISBN :
1944-9399