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This paper discusses the partial discharge (PD) resistant mechanism of nanocomposite enamel wires under repetitive surge voltage condition for inverter-fed motors. We focused on the reduction of deterioration depth and the surface condition of nanocomposite enamel wires after repetitive surge voltage application with successive PD. Experimental results revealed that the longer lifetime of breakdown...
In this paper, we discussed partial discharge (PD) inception characteristics and mechanisms of magnet wires for inverter-fed motor under repetitive surge voltage application. Experimental results revealed the relationship between PD inception voltage (PDIV) and parameters of applied surge voltage waveform. The relationship between PD pulses and repetitive surge voltage pulses was also investigated...
This paper discusses partial discharge (PD) propagation, degradation and lifetime characteristics of magnet wires for inverter-fed motor under surge voltage application. Experimental results showed the time variation of PD activity, i.e. intermittent PD, successive PD, critical PD and breakdown (BD), under repetitive surge voltage application with a fixed peak value. Critical PD was a drastic change...
In this paper, we focused on the breakdown lifetime characteristics under repetitive surge voltage application for nanocomposite enameled wires. Experimental results revealed that the nanocomposite enameled wires exhibited the longer breakdown lifetime as high as 1000 times of conventional enameled wires under surge voltage application. The relationship between the surge breakdown voltage V and the...
We have been investigating the PD activities of magnet wire for inverter-fed motor under surge voltage application. In this paper, we obtained and compared PD inception characteristics by using different measuring methods and discussed PD generation mechanism in consideration of surface charging. PD signals were detected by electrical, optical and electromagnetic methods using high-frequency current...
In this paper, we investigated the PD generation, propagation, degradation and breakdown (BD) characteristics of magnet wire for inverter-fed motor under surge voltage application. Experimental results revealed the transition of PD activity, i.e. intermittent PD, successive PD, critical PD and BD, under repetitive surge voltage application with a fixed peak value. The transition from intermittent...
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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