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Nowadays a lot of high voltage components are insulated by sulfur hexafluoride gas. This gas is unfortunately one of the main responsibles for the progressive increase of the global temperature: for this reason the sulfur hexafluoride gas should be substituted involving the need to find different gases or gas mixtures more environment-friendly. Furthermore it is well known that sulfur hexafluoride...
In these last years, different research studies constantly investigated the possibility to find a new class of materials in the field of medium/high voltage insulation. Nowadays, the conventional materials that are commonly used in this field of interest are non-recyclable. In this research activity, the electrical behavior of new recyclable nanostructured materials is investigated in order to study...
Electrical machines and in particular electrical motors used in industry applications are usually coupled with inverter drives in order to better control both the motor torque and speed. Due to the presence of these inverter drives, the stator motor windings are subjected to severe voltage waveforms. When the electrical motors having stator windings insulated by means of type I random wire wound are...
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,...
Electrical treeing in polymeric insulation is potentially a nano-structure dependent phenomenon. The present work is part of a preliminary study on electrical treeing in EVA-layered silicate nanocomposites having different morphology. Two parameters have been mainly considered: the treeing inception voltage (TIV) and the breakdown voltage (BDV). These parameters, especially the TIV, have shown a significant...
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