Dynamic modelling of the stator system of flat wire motors

The dynamic behaviour of a stator system is crucial for the development of electric motors, as it plays a vital role in predicting and optimising the motor noise, which has emerged as a primary source of noise emissions in pure electric vehicles. Although the finite element method (FEM) is widely employed for modelling stator systems, existing FEM models typically focus on circular wire windings and fail to accurately represent stator systems with flat wire windings. Consequently, this paper aims to develop more precise FEM models for flat wire motor stator systems. The FEM models for the stator core, flat wire windings, insulating material, and the entire stator system are constructed by incorporating the unique characteristics of flat wire stator systems, particularly their radial stacking features. These proposed FEM models are validated through modal experiments conducted on an 8-pole 48-slot permanent magnet synchronous motor with flat wire windings.