The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2016
Filed:
Aug. 01, 2012
Thomas Wolbank, Vienna, AT;
Thomas Wolbank, Vienna, AT;
TECHNISCHE UNIVERSITAT WIEN, Vienna, AT;
Abstract
The invention relates to a method and a device () for the online-detection of a deterioration in the state of an insulation in an electric machine (). A stepped voltage is applied to the winding(s) () of the machine () with the aid of a converter (), 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 () 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/ΔT) and/or a damping constant, in order to detect any deterioration in the insulation.