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Several electrical aging tests have been carried out on twisted pair specimens prepared by winding wires having conventional or nanostructured enamel insulation. The conventional enamel is polyamide-imide, while the nanostructured enamel is a polyamide imide - silica nanocomposite. The tests have been performed applying sinusoidal voltage at two different frequencies. The partial discharge (PD) signals...
Partial discharge (PD) measurements can be a very powerful tool for the condition assessment of electrical insulation systems. When applied to rotating machines or winding insulation mock-ups, if pulsed power supplies are considered (PWM), PD measurement can provide not only an "on/off output about the presence or not of PD pulses but could also provide information about the degradation processes...
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