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The stator motor windings of low voltage rotating electrical machines are usually insulated by organic enamel. When the motors are supplied by power electronic converters, the stator insulation system is subjected to different voltage waveforms such as PWM. Due to reflection phenomena, overvoltage can be associated to pulsed waveforms and partial discharge (PD) activity can incept leading to the insulating...
The stator motor windings of low voltage rotating electrical machines are usually insulated by organic enamel. When the motors are supplied by power electronic converters, the stator insulation system is subjected to pulsed voltage waveform and a fast degradation of the insulating system could occur. In fact, it is possible that partial discharge (PD) activity incepts leading to the deterioration...
The massive adoption of electronic converters to supply induction motors leads to critical problems during the normal operation. One of the most investigated problem is the unexpected early failure of the stator winding insulation. When the motors are supplied by electronic converters, the stator insulating system could be subjected to over-voltages due to resonance and reflection phenomena; if these...
Considering the great importance of the degradation phenomena acting on the insulating materials of the inductor motor windings supplied by inverter drives based on IGBT the behaviour of different kinds of insulating organic enamels have been investigated. During the research activity, twisted pair specimens have been realized and subjected to severe voltage waveforms having peak to peak amplitudes...
Low voltage stator windings of electrical machines are often realized by means of wires insulated by organic enamel. This kind of enamel can be subjected to partial discharges (PD) activity that could lead to breakdown condition the electrical insulating system so that the life time could be shorter than the expected one. In this research work, twisted pair specimens insulated by non corona resistant...
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