Design And Comparative Analysis Of An Induction Motor With Non-Oriented Electrical Steels

Abstract

The performance of an induction motor is strongly influenced by the choice of lamination steel, as magnetic properties directly affect iron losses and overall efficiency. In this study, a three-phase, 5 HP 50 Hz squirrel-cage induction motor was designed and analysed using ANSYS Electronics Desktop, with the initial design performed in RMxprt and detailed simulations carried out in Maxwell 2D/3D. Three grades of non-oriented electrical steel DI-MAX series (M15, M19, and M36) were evaluated under identical motor geometry and operating conditions. The investigation focused on core loss distribution and efficiency at rated load, as these parameters directly reflect the impact of the lamination material. The results show that M19 exhibited the best performance, with the lowest total core loss of 5 W (4 W in the stator and 0.5 W in the rotor) and the highest efficiency of 92.33%. The motor using M15 recorded moderate performance, with 16 W of core loss (15 W stator, 1 W rotor) and an efficiency of 91.47%. In contrast, M36 resulted in the highest core losses of 40 W (38 W stator, 2 W rotor), leading to the lowest efficiency of 90.14%. These findings confirm that the selection of lamination steel plays a decisive role in energy efficiency and loss minimization. The study demonstrates that advanced simulation tools can effectively guide material selection for induction motor design, where M19 emerges as the most suitable option, while M15 offers a compromise between performance and cost.