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To study the influence of temperature on partial discharge (PD) statistics and endurance of inverter-fed motor insulation, experiments were carried out focusing on enameled wires tested under bipolar repetitive square wave voltages at different temperatures. The PD pattern, delay time, amplitude and life were obtaiaed according to a large amount of test results. Experimental results show that the...
The repetitive impulsive surges from inverters has been found undoubtedly to cause insulation reliability flaws in inverter-fed motors. To mitigate this problem, PD detection and life testing under sinusoidal and/or repetitive square voltages should be performed on new types of inverter-fed motor insulation, according to IEC standard and Technical specification(TS), (i.e. IEC 60034-18-41 and IEC TS...
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