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A coupled electromagnetic‐mechanical‐acoustic model of a DC electric motor

Martin Furlan (R&D, ISKRA Avtoelektrika d.d., Sempeter pri Gorici, Slovenia)
Andrej Cernigoj (R&D, ISKRA Avtoelektrika d.d., Sempeter pri Gorici, Slovenia)
Miha Boltezar (Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia)
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Abstract

In this article, we present an investigation into the sound radiation from a permanent‐magnet DC electric motor using the finite‐element (FE) and boundary‐element (BE) models. A three‐times‐coupled electromagnetic‐mechanical‐acoustic numerical model was set‐up to predict the acoustic field. The first stage was to calculate the magnetic forces that excite the structure of the motor by using the FEM. In the second stage, the exciting magnetic forces were applied to the structural model, where the harmonic analysis was carried out using the FEM. The last stage was to model the acoustics by using the BEM. In order to evaluate the numerical model, the computational results were compared with the vibration and acoustic measurements and a reasonable agreement was found.

Keywords

Citation

Furlan, M., Cernigoj, A. and Boltezar, M. (2003), "A coupled electromagnetic‐mechanical‐acoustic model of a DC electric motor", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 22 No. 4, pp. 1155-1165. https://doi.org/10.1108/03321640310483075

Publisher

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MCB UP Ltd

Copyright © 2003, MCB UP Limited

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