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Online monitoring method based on magnetic field for stator insulation lifetime tests = Online-Überwachungsmethode auf Basis des magnetischen Felds für Statorisolations-Lebensdauertests

Weisenseel, Lukas 1; Sieling, Dennis; Dietz, Daniel; Rittmaier, Jochen; Doppelbauer, Martin 1
1 Elektrotechnisches Institut (ETI), Karlsruher Institut für Technologie (KIT)


In this paper, an online monitoring method of insulation faults based on the stator magnetic field for insulation life tests is developed. In recent years, a trend towards higher operating voltages, higher switching frequencies, and shorter voltage rise times has been observed for low-voltage motors, mainly driven by increasing electromobility. An insulation system must withstand these requirements over the entire operating range and the required service life. Significant over-dimensioning of the insulation is not justifiable, since this has a negative impact on the utilization or the efficiency of the machine. Lifetime tests are therefore required for dimensioning the insulation. For this purpose, end-of-life (EOL) tests are usually carried out. Here, different damage patterns occur, which are distinguished during the analysis. In addition to the EOL test, insulation faults can be detected by monitoring the magnetic field of a stator during the operating time (“online”). An early shutdown often prevents the drive from further damage. In this paper, five methods to evaluate the magnetic field are presented. The operation is investigated using a 2D FEM simulation (sinus excitation) and a network simulation (PWM excitation) and evaluated through measurements on a 4 kW PM external rotor stator. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000158009
Veröffentlicht am 05.05.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Elektrotechnisches Institut (ETI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0932-383X, 1613-7620
KITopen-ID: 1000158009
Erschienen in e & i Elektrotechnik und Informationstechnik
Verlag Springer
Band 140
Seiten 314-323
Vorab online veröffentlicht am 04.04.2023
Nachgewiesen in Scopus
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