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Influence of Inverter Modulation Strategy on Electric Drive Efficiency and Perceived Sound Quality
Electric Propulsion Systems Department, Volvo Car Group, Gothenburg, Sweden.ORCID iD: 0000-0002-3639-0659
oise, Vibrations, and Harshness Department, Volvo Car Group, SE-405 31 Gothenburg.ORCID iD: 0000-0002-8489-8297
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics. (Engineering Acoustics)ORCID iD: 0000-0002-7048-523X
Number of Authors: 3
2016 (English)In: IEEE Transactions on Transportation Electrification, ISSN 2332-7782, Vol. 2, no 1, 24-35 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents an evaluation of differentmodulation techniques and different levels of switching frequencyrandomization for a rear axle electrical drive unit used in auto-motive applications. Inverter and machine losses, and perceivedsound quality of high-frequency acoustic noise are investigated byfinite element calculations, experimental testing, and subjectivenoise assessment. Additionally, stator current harmonics, airgapflux density harmonics, and force density harmonics are comparedfor space vector modulation (SVM) and discontinuous pulsewidthmodulation through finite element modeling. The main conclusionis that, primarily in the field weakening region, significant energysavings can be achieved (up to 17% decrease in total inverter losseswith a switching frequency of 10 kHz). This is obtained withoutdeterioration of perceived sound quality by the use of discontinu-ous pulsewidth modulation with switching frequency randomiza-tion. Furthermore, randomization of the switching frequency doesnot improve the perceived sound quality of the acoustic noise whenusing SVM. However, for discontinuous pulsewidth modulation,improvements in perceived sound quality when randomizing theswitching frequency are observed, primarily below base speed.

Place, publisher, year, edition, pages
IEEE, 2016. Vol. 2, no 1, 24-35 p.
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Acoustics
Identifiers
URN: urn:nbn:se:ltu:diva-61463DOI: 10.1109/TTE.2015.2514162OAI: oai:DiVA.org:ltu-61463DiVA: diva2:1065917
Note

Validerad;2017;Nivå 1;2017-07-05 (inah)

Available from: 2017-01-17 Created: 2017-01-17 Last updated: 2017-07-05Bibliographically approved

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Publisher's full texthttp://resolver.ebscohost.com/openurl?sid=google&auinit=A&aulast=Andersson&atitle=Influence+of+Inverter+Modulation+Strategy+on+Electric+Drive+Efficiency+and+Perceived+Sound+Quality&id=doi%3a10.1109%2fTTE.2015.2514162&title=IEEE+Transactions+on+Transportation+Electrification&volume=2&issue=1&date=2016&spage=24&issn=2332-7782&site=ftf-live

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