Simulation and Validation of Stator Modes of a Hair-Pin Motor 2023-01-1074

Abstract: With the trend of electric drive unit gradually replacing ICE powertrain, the motor noise has become the main NVH challenge, as it is easier to be detected, especially in the pure electric vehicle that has no masking effect of ICE powertrain. Therefore, how to accurately predict and reduce the motor noise is the key to solve the problem. The accuracy of calculated motor stator modes determines the accuracy of motor noise prediction. This paper presents a simulation method based on the finite element model and defined orthotropic material properties of the stator. The material property parameters of the stator core and hair-pin windings are reverse-engineered through iterative correlations to test data. High accuracy of stator modal shapes and frequencies is achieved, which provides a reliable and effective approach for the motor noise prediction and reduction studies.