Operational deflection shapes of a PWM-fed traction motor
2016 (English)In: Conference Proceedings of the Society for Experimental Mechanics Series, Springer, 2016, 209-217 p.Conference paper (Refereed)
Operational deflection shapes of an asynchronous traction motor for railway applications are investigated. The radiated noise from the tractionmotor on a train is, especially at low speeds, dominated by noise generated by electromagnetic forces. The tested motor is fed by a pulse-width-modulated (PWM) frequency converter for which the voltage is modulated as a series of pulses that are switched with a certain frequency. In this case, PWM force lines can be expected to influence the radiated noise. Therefore, detailed knowledge about the frequencies and deflection shapes of vibrations generated by PWM forces is of great importance for understanding and controlling the radiated noise and its spectral content. Vibration levels are measured on the stator shield and the operational deflection shapes are studied for several PWM switching frequencies and motor speeds. The deflection shapes with the largest vibration levels are determined. These are then compared to the expected excitation resulting from the pure PWM force lines. Changing the switching frequency, will shift the frequencies of the exciting forces. An appropriate selection of the PWM switching frequency is therefore important for the resulting acoustic radiation from the motor. © The Society for Experimental Mechanics, Inc. 2016.
Place, publisher, year, edition, pages
Springer, 2016. 209-217 p.
Electromagnetic noise, Operational deflection shapes (ODS), Pulse-width-modulation (PWM), Traction motor, Vibrations, Acoustic noise, Acoustic noise measurement, Acoustic wave propagation, Counting circuits, Damage detection, Deflection (structures), Gears, Machinery, Pulse width modulation, Rotating machinery, Structural dynamics, Switching frequency, Testing, Vibration measurement, Voltage control, Acoustic radiation, Electromagnetic forces, Operational deflection shapes, Pulse-width-modulated, Railway applications, Spectral content, Traction motors
IdentifiersURN: urn:nbn:se:kth:diva-194590DOI: 10.1007/978-3-319-30084-9_20ISI: 000387431500020ScopusID: 2-s2.0-84978656521ISBN: 9783319300832OAI: oai:DiVA.org:kth-194590DiVA: diva2:1044146
34th IMAC, A Conference and Exposition on Structural Dynamics, 2016, 25 January 2016 through 28 January 2016
Correspondence Address: Amlinger, H.; KTH Royal Institute of Technology, The Marcus Wallenberg Laboratory for Sound and Vibration Research (MWL), KTH Railway GroupSweden; email: email@example.com. QC 201611022016-11-022016-10-312016-12-22Bibliographically approved