2009 (v1)
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2004 (v1)Publication
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2005 (v1)Publication
This work is related to a medium term research program which aims at studying the behaviour of twisted pair specimens of enamelled copper Wires subjected to high frequency sinusoidal voltage waveforms which are used in some advanced types of electrical machines. High frequency voltages due to, for instance, converter operation are not...
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2010 (v1)Publication
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1997 (v1)Publication
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2009 (v1)Publication
In this work the partial discharge (PD) patterns acquired during electrical aging tests performed on twisted pair specimens prepared by winding wires having conventional or nanostructured enamel insulation are compared. The conventional enamel is polyamide imide, while the nanostructured enamel is a polyamide-silica nanocomposite. The tests...
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1985 (v1)Publication
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2005 (v1)Publication
Partial Discharge (PD) measurements output, when non-sinusoidal voltages are applied to insulating systems, can have different meanings, depending on the voltage waveform frequency content and on the PD probe circuit. A PD detection circuit is designed for a low noise-to-signal ratio, thus for suppression of the residual high frequency (HF)...
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2004 (v1)Publication
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2004 (v1)Publication
This investigation regards the partial discharges (PD) ageing processes of motor winding insulation (enamelled wires) subjected to 'Tast rising and dropping" voltages, i.e. to a PWM controlled inverter drive voltage waveform. Twisted pair specimens were fed till failure by two different PWM like (and by a sinusoidal) voltages, at several...
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2003 (v1)Publication
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2008 (v1)Publication
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1982 (v1)Publication
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1981 (v1)Publication
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2009 (v1)Publication
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2006 (v1)Publication
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2006 (v1)Publication
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2007 (v1)Publication
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2004 (v1)Publication
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2007 (v1)Publication
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2011 (v1)Publication
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