A Review on the Effect of Electrical Steel Manufacturing Processes on the Performance of Electric Machines

Abstract

The manufacturing processing of Electrical Steel Laminations (ESLs) for electric machines comprises cutting, stacking, and housing techniques which can result in plastic deformation and residual stress in the soft magnetic material. These manufacturing processes result in decreasing the magnetic quality and a local increase in both the static and dynamic hysteresis losses near the cut edges and consequently a reduction in the performance of the designed motor. The iron losses resulting from cutting can vary by a factor of two or more depending on geometrical, material, and processing parameters as well as the magnetic field strength. It is advantageous to consider these manufacturing effects in the design stage to reduce the probability of underperforming mass production. In this paper, the manufacturing processes of ESLs and their modelling methods are comprehensively surveyed. The gaps in scientific understanding and the research need for the expansion of accurate modelling of the cutting and joining of ESLs are subsequently discussed.

Robust Design of Induction Machines for High-Speed Electric Freight Locomotive Applications

“…Therefore, operating traction motors at lower working temperatures can significantly increase their lifetime and reliability. On the other hand, the manufacturing processes of electrical machines can negatively impact the efficiency and performance of the electric machines, and it may be challenging to reach an agreement between the FEM simulation and experimental results [36]. Considering these factors, a safe margin between the capability curve obtained through FEM simulations and the required curve for actual operation is crucial during the FEM simulation and design process of electrical machines.…”