Technical Paper
Material modelling of Lamination Stack in Electric Machines
2024-04-09
2024-01-2745
Rotor and stator of electric motors consist of multiple materials, of which, steel forms the majority of mass and volume. In order to reduce the eddy current losses in the motor, the steel is in the form of thin sheets, stacked along the length of the rotor and stator. This stack of steel is often bonded or welded together for structural integrity. Predictive simulations of these laminated stacks can become computationally intense because the steel sheets are thin, and the motor often contains hundreds of them. In this paper, we present an alternate method of modelling this laminated stack as a single body using homogeneous and anisotropic material property. This can provide realistic predictions while keeping the computational time significantly lower than modelling separate steel sheets.