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Impact of PWM switching frequency on the radiated acoustic noise from a traction motor
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, The KTH Railway Group.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, The KTH Railway Group.ORCID iD: 0000-0002-3609-3005
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, The KTH Railway Group.
2017 (English)In: 2017 20th International Conference on Electrical Machines and Systems, ICEMS 2017, Institute of Electrical and Electronics Engineers Inc. , 2017Conference paper, Published paper (Refereed)
Abstract [en]

The radiated acoustic noise from a traction motor at low speeds is dominated by the noise of electromagnetic origin. For a motor operated from pulse width modulated (PWM) converters, the switching frequency of the converter will have a large impact on the noise. The total harmonic distortion of the motor phase currents and thus also the exciting forces, will decrease with increasing switching frequency. Furthermore, changing the switching frequency will shift the frequencies of the exciting forces, hence have an influence on the coincidence with structural resonances of the motor. Tests have been performed on a traction motor and a decrease in sound pressure level with increasing switching frequency has been quantified and analyzed.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc. , 2017.
Keywords [en]
Acoustic noise, Pulse width modulation (PWM), Switching frequency, Traction motor, Electric machinery, Pulse width modulation, Switching, Voltage control, Exciting forces, Low speed, Motor phase, Pulse width modulated converters, Sound pressure level, Structural resonance, Total harmonic distortion (THD), Traction motors
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-227093DOI: 10.1109/ICEMS.2017.8056206Scopus ID: 2-s2.0-85034653627ISBN: 9781538632468 (print)OAI: oai:DiVA.org:kth-227093DiVA, id: diva2:1206005
Conference
20th International Conference on Electrical Machines and Systems, ICEMS 2017, 11 August 2017 through 14 August 2017
Note

QC 20180515

Available from: 2018-05-15 Created: 2018-05-15 Last updated: 2018-05-15Bibliographically approved

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Lopez Arteaga, Ines

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