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Erschienen in:
09.05.2023 | Originalarbeit
Determination of noise, vibration, and harshness (NVH)-relevant electromagnetic forces in PMSMs
Erschienen in: e+i Elektrotechnik und Informationstechnik | Ausgabe 3-4/2023
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Abstract
This paper deals with the determination of electromagnetic forces in permanent magnet synchronous machines (PMSMs) and their influence on the noise, vibration, and harshness (NVH) behavior of a drive system. Electromagnetic forces, i.e., forces in the stator teeth and the rotor, can be determined by evaluating the air gap flux density. The air gap flux density is obtained through a time-dependent FE simulation and can be presented as a 2D matrix over time and space. The time and spatial harmonics of this matrix are calculated with the complex 2D FFT. The results are illustrated as clear bubble plots, which make it easy to determine critical harmonics. Moreover, the identified problematic harmonics are plotted either over the complete torque speed map or over the currents id and iq. The latter representation can be used to determine NVH-optimized id∕iq combinations that deviate from the usual MTPA (maximum torque per ampere) current combinations.