The vastly increased range of operating speeds and loads of electric vehicle (EV) traction motors implies that the use of traditional finite element (FE)-based noise vibration and harshness (NVH) optimization methodologies becomes challenging due to extensive computational loads. Thus, reduced-order analytical methodologies have become of crucial significance for fast decision-making at predesign stages. In this work, a novel combination of analytical techniques is utilized, to formulate a multiphysics methodology for electromagnetic (EM) NVH prediction of typical high-speed surface-mounted permanent magnet synchronous machines (S-PMSMs). Calculation of the EM stresses in open-circuit conditions was performed using the 2-D complex permeance (CP) methodology. Vibroacoustic predictions were made using analytical expressions for an equivalent 2-D representing the stator. Unlike traditional analytical methodologies, further refinements were implemented to improve the accuracy of the vibroacoustic calculations without sacrificing computational efficiency, through a set of force transformation techniques. These allowed for consideration of the tooth modulation and tangential excitation effects, which are typically neglected in similar studies. The methodology was applied on a 48-slot 8-pole S-PMSM with EM and vibroacoustic results validated numerically. A fast parametric study was performed on the design parameters for the optimization of the generated force harmonics, achieving significant reductions in the sound power levels (SWL) at specific frequencies.
Analytical Multiphysics Methodology to Predict Vibroacoustics in PMSMs Combining Tangential Electromagnetic Excitation and Tooth Modulation Effects
IEEE Transactions on Transportation Electrification ; 10 , 3 ; 5997-6009
01.09.2024
3628224 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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