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In this paper, we propose an estimation method of partial discharge inception voltage (PDIV) under inverter surge voltage application. We focused on the generation probability of initial electrons which induce PD under high electric field and short rise time of surge voltage by means of Volume-Time theory. We extended the Volume-Time theory to PD phenomena in a wedge-shaped air gap of enameled wires...
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...
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