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Acoustic effects of the coolant mass flow of an electric machine of a hybrid drive train

Schnell, Michael; Gauterin, Frank

Abstract (englisch):
In this application paper, the influence of the coolant mantle on the acoustic radiation behaviour of a hybrid drive train is investigated. This was done on an electric machine on an acoustic component test bench. The coolant mass flow around the electric machine stator was varied and then completely drained. The electrical machine remained mechanically unchanged; any variations were made to the feed pumps on the test bench side. Triaxial acceleration sensors are glued to the machine housing and reviewed as evaluation criteria. For the evaluation, the square mean value of all three spatial directions of the glued acceleration sensors was calculated. The evaluation shows that there is no significant acoustic difference between an active stator cooling jacket and a stationary stator cooling jacket. If the stator cooling jacket is pumped out empty so that air remains in it, there is a strong reduction in surface acceleration. The observations are confirmed by analytical literature values. The results presented serve as a basis for further work and developments.

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Verlagsausgabe §
DOI: 10.5445/IR/1000128807
Veröffentlicht am 19.02.2021
Originalveröffentlichung
DOI: 10.1007/s41104-019-00053-x
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2019
Sprache Englisch
Identifikator ISSN: 2365-5127, 2365-5135
KITopen-ID: 1000128807
Erschienen in Automotive and engine technology
Verlag Springer
Band 4
Heft 3-4
Seiten 189–193
Vorab online veröffentlicht am 14.10.2019
Schlagwörter electric engine; NVH; fluid-structure; automobiles; test-bench; noise; vibration; acoustic
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