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Measurement of inverter caused losses in permanent magnet synchronous machines using a modular multiphase multilevel converter

Rollbühler, Christoph 1; Stefanski, Lukas ORCID iD icon 1; Gretzinger, Stefan 1; Kolb, Johannes; Hiller, Marc 1; Doppelbauer, Martin 1
1 Elektrotechnisches Institut (ETI), Karlsruher Institut für Technologie (KIT)


Current distortion of two-level converter-fed permanent magnet synchronous machines causes additional machine-side losses, which lead to a distinct reduction in the drive train efficiency of electric vehicles for instance. Determining these losses by measurement is still an ambitious task. On the one hand, there's a lack of adequate voltage sources. On the other hand, there is no accurate procedure to distinguish between the different loss components. In this publication, a 100 kVA seven-level multilevel converter is used to determine the losses of a 60 kW highly-utilized permanent magnet synchronous machine for automotive use. Due to the good voltage quality of the multilevel converter, the machine currents have very low harmonic distortion and the determined losses are considered as fundamental ones. In a second experiment, the machine is operated with a conventional two-level converter. Comparing machine losses in both experiments allows the determination of the additional machine losses in two-level operation.

Postprint §
DOI: 10.5445/IR/1000100814
Veröffentlicht am 12.12.2019
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Elektrotechnisches Institut (ETI)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2019
Sprache Englisch
Identifikator ISBN: 978-895708313-0
KITopen-ID: 1000100814
Erschienen in ICPE 2019 - ECCE Asia : 10th International Conference on Power Electronics - ECCE Asia, May 27-10, 2019 BEXCO, Busan, Korea
Veranstaltung 10th International Conference on Power Electronics - ECCE Asia (ICPE 2019), Busan, Südkorea, 27.05.2019 – 30.05.2019
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Seiten 1239-1245
Schlagwörter Loss Measurement, Multilevel Converter, Interior Permanent Magnet Synchronous Machine, Current Ripple
Nachgewiesen in Scopus
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie
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