Role of Nanofillers in Induction Motor Enamelled Wires Exposed to PWM-VSC Waveforms

In this research work, the performance of enamelled wires with and without nanofiller in the coating is investigated. The wire specimens are exposed to PWM-VSC waveforms. After partial discharge erosion (PD) on enamel wire coatings, the surface roughness is measured by using image-tod software. In all investigations, the images used, are captured by using scanning electron microscope (SEM). The experimental results revealed that the surface erosion in the specimens without nanofiller is considerably greater compared to the specimens with ~1%, by wt, nanofillers. The statistical analysis, using Weibull distribution of dielectric strength data, show that the value of the shape parameter increases tremendously, which indicates that the coatings with nanofillers becomes more homogeneous and exhibits fewer defects.