发明名称 Method and device for detecting a deterioration in the state of an insulation in an operating electric machine
摘要 The invention relates to a method and a device (1) for the online-detection of a deterioration in the state of an insulation in an electric machine (2). A stepped voltage is applied to the winding(s) (3) of the machine (2) with the aid of a converter (41), and the current (i) induced in this manner, and/or the time derivative (di/dt) thereof, is acquired as a measurement signal with the aid of at least one sensor (6, 7, 8) and is then oversampled with a frequency higher than the frequencies characteristic for settling. The signal obtained by said oversampling is then evaluated with regard to parameters of the settling process such as overshooting (Ah) and/or natural frequency (1/ΔΤ) and/or a damping constant, in order to detect any deterioration in the insulation.
申请公布号 AU2012289811(B2) 申请公布日期 2016.11.10
申请号 AU20120289811 申请日期 2012.08.01
申请人 Technische Universitat Wien 发明人 Wolbank, Thomas
分类号 G01R27/28;G01R31/06;G01R31/28;G01R31/34 主分类号 G01R27/28
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