Slot Number Dependence of In-Plane Eddy-Current Loss in Electrical Steel Sheets of 6-pole Permanent-Magnet Synchronous Machines

Comprehensive study on in‐plane eddy‐current loss in permanent‐magnet synchronous machines

“…In our previous research, we have analysed the in‐plane eddy‐current loss in PMSMs ranging from 5 to 50 kW using 3D electromagnetic field analysis and reported that the iron loss is proportional to the output power of the PMSM, whereas the in‐plane eddy‐current loss is not [9]. We have also reported that the in‐plane eddy‐current loss decreases as the number of stator slots increases under the condition of the same output power and different numbers of stator slots [10]. In these calculations, the electrical conductivity in the stack direction of the iron core was determined to be 1/5000 of that in the in‐plane direction only from the perspective of the convergence.…”