Electrical Performance analysis of Enamelled-Extruded Wires based on Partial Discharges and Voltage Endurance
Résumé
This study aims to explore an economically feasible enamelled wire technology based on sol-gel, offering enhanced performance compared to traditional enamelled wire. The evaluation involves assessing insulation configurations for copper wires designed for high-temperature applications, with a proposed configuration combining sol-gel solution on enamel and PPS extrusion resins. Electrical performance is compared across these insulation configurations, building upon their demonstrated higher thermal performance in prior research. Experimental data, including partial discharge parameters, dielectric strength, and electrical aging endurance, are collected from twisted pair samples for each insulation type. Promising results emerge from partial discharge studies, favoring hybrid technology (enamelled-extruded wires) over the classical approach (PEI+PAI enamelled wires). Measurements reveal a higher intensity of partial discharges for classical enamelled wires under 3 kV-50 Hz. Moreover, lifespan models under voltage stress indicate that enamelled-extruded wires with PPS extruded resin have advantages, withstanding 1525 minutes compared to 530 minutes for classical wires under 3 kV-50 Hz. A correlation between lifespan under voltage stress and partial discharge intensity is observed. Furthermore, microfillers on PPS show lower results compared to non-filled enamelled-extruded wire configurations.
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