Frequency domain solution method for electromagnetic influence analysis on torsional vibrations
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2025-02-05
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Mcode
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Language
en
Pages
18
Series
Journal of Sound and Vibration, Volume 596
Abstract
In electric motor-driven machines, mechanical torsional dynamics are nonlinearly coupled with the electrical system through the electromagnetic torque and the counter-electromotive force. In this paper, an approach based on small-signal linearization is proposed for modeling the steady-state torsional dynamics of the coupled system. Using the linearized model, resonance interference diagrams, torsional response, and stability can be evaluated rapidly across numerous operating points, while accurately accounting for the electromagnetic effects. The model is validated with conventional time-stepping simulations of two induction machines. An example analysis of a 3 MW motor-driven compressor train displays the modification of torsional properties due to the electromagnetic coupling effect and explains the mechanism of torsional destabilization. Finally, previously published measurements of a 37 kW motor test bench are considered to validate the instability of the elastic torsional mode predicted by the model.Description
Publisher Copyright: © 2024 The Authors
Keywords
Electric machine, Electromechanical interaction, Induction motor, Structural dynamics, Torsional vibration
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Citation
Laine, S, Hakonen, U, Hartikainen, H & Viitala, R 2025, ' Frequency domain solution method for electromagnetic influence analysis on torsional vibrations ', Journal of Sound and Vibration, vol. 596, 118780 . https://doi.org/10.1016/j.jsv.2024.118780