Life Tests on Twisted Pair Specimens Insulated by Nanofilled Enamel

Polymeric nanocomposite materials have shown a big potential for an impact in wire wound rotating machine stator insulation. Small wire wound machines, in fact, have a mainly organic stator winding insulation which is easily degraded by partial discharge (PD) activity. In this kind of equipment, then, the presence of PD activity leads to failure in a very short time. Nanofilled polymeric materials, in some early experimental work, have shown an enhancement of the resistance to PD stress. If such results will be confirmed, the adoption of this class of materials for stator winding insulation can allow both the motor maintenance and a general increase of reliability.