Using segmented laminations for construction of AC electric machines can yield several manufacturing and performance-related benefits. However, it also increases the cut edges in the assembled core, which can increase the core loss and decrease the efficiency of the machine. Literature evaluating manufactured segmented stators is limited and provides a crude understanding of the impact of additional cut edges on the core loss. This work presents an experimental technique for quantifying the detrimental effect of cut edges using manufactured segmented stators and three different H-shaped electrical steel lamination devices. The proposed technique can calculate core loss in tooth and back iron regions and separate the core loss due to two types of additional cut edges. Experimental results from two segmented stators corroborate the proposed technique.

This presentation will provide insights into:

• Advantages and challenges associated with segmented traction machines
• Analytical method to model a segmented stator
• Experimental methods to evaluate losses due to additional cut edges