Experimental Investigation of Low voltage Alternators Fabricated Using Optimized Polyester Resin Nanocomposite Insulation

Abstract

The demand for high-performance, reliable, and durable low-voltage rotating machines, such as industrial alternators, is continuously growing across various sectors. These machines are crucial for numerous applications, including powering electrical drives and providing electricity in commercial, industrial, and residential settings. The efficiency, operational longevity, and reliability of these machines are primarily governed by the quality of their insulation systems, which protect the windings from electrical and thermal stresses. However, traditional insulation materials face significant challenges in harsh operational environments, such as high temperatures, electrical discharges, and mechanical stresses, leading to premature aging and failure. This thesis investigates the potential of using hexagonal boron nitride (hBN) nanofillers to enhance the performance of polyester resin used in the insulation systems of low-voltage rotating machines. The thesis begins with an introduction outlining the importance of low-voltage rotating machines in modern industry and the critical role of insulation systems in their performance and durability. The limitations of traditional insulation materials and the potential benefits of integrating hBN nanofillers into polyester resin, a widely used insulation material in industrial alternators, are highlighted. A comprehensive review of the existing literature on nanocomposites, particularly hBNbased composites, is presented. Various studies that have explored the enhancement of insulation properties through the incorporation of nanofillers are discussed. The advancements in nanotechnology that have made it possible to improve the thermal conductivity, dielectric strength, and mechanical properties of insulation materials are also covered. The challenges associated with the practical application of these materials in industrial settings, as well as the gaps in research that this thesis aims to fill, are addressed.