Motor Noise and Vibration Simulation Accuracy Improvement via Modal Parameter Tuning

Noise, Vibration, and Harshness (NVH) are critical factors in the design and performance of electric motors. Excessive NVH can lead to reduced product life, increased maintenance costs, and customer dissatisfaction. Addressing NVH challenges early in the design stage is crucial to avoid major NVH issues in the later design stage. Ansys Motor-CAD employs analytical methods that enable fast NVH analysis [1]. However, stator stiffness calculation may be limited in certain cases due to the simplification of the stator shape into a basic ring in the analytical model. This paper discusses how to improve NVH simulation accuracy by tuning modal parameters, which are obtained from either simulation or test. The validity of the proposed method is verified through simulation using full finite element analysis (FEA).