Analysis of iron loss in interlocked lamination core

Interlocking is widely used to clamp laminated electrical steel sheets automatically in the die system. The magnetic properties of lamination cores can be deteriorated by the influence of interlocking during the manufacturing process, causing extra core loss and reducing the efficiency. So it is crucial to minimize the extra loss by analyzing the interlocking performance of lamination core. This paper presents the performance of interlocking dowel by modelling the V-shape interlocking dowel with 2-D finite element method (FEM). The simulation results show that choosing a proper number of interlocking dowels with suitable locations can reduce the extra loss.