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Partial discharge (PD) endurance test was performed on twisted pair specimens of enameled wires consisting of polyamide-imide resin with nanometer-size fillers. Specimens were prepared with containing nanometer-scale silica or titania fillers, as well as specimens without fillers. In the PD endurance test, so-called V-t characteristics of the twisted pair specimen were measured by applying a constant...
Nanocomposite enameled wires have been developed for inverter-fed random wound motor windings, however, partial discharge (PD) characteristics is still underlying physics. In this study, effects of environmental conditions on PD characteristics in twisted pairs with conventional and nanocomposite enameled magnet wires were investigated. Measurements of the PD inception voltage (PDIV) and an amount...
In inverter-fed motor coils, surge voltages with the rise time of several tens or hundreds of nano-second may cause partial discharge (PD) and degradation of electrical insulation performance of the inverter-fed motor coils. This paper discusses PD inception characteristics as well as PD propagation characteristics after PD inception for magnet wire of inverter-fed motor under surge voltage application...
Recently, partial discharge (PD)-resistant enameled wires mixed with inorganic particles of nanometer order, referred to as the nanocomposite enameled wires, have been developed and verified to have longer life compared with conventional enameled wires. We investigated the fundamental characteristics on PD inception, propagation and breakdown (BD) of nanocomposite enameled wire under surge voltage...
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