Investigations on the Experimental Identification of AC-Copper Losses in Permanent Magnet Synchronous Machines using a Motor Sub-Assembly

Christoph Rollbühler, Sebastian Peukert, Daniel Fritz, Jean-Francois Heyd, Johannes Kolb & Martin Doppelbauer
Analysis of AC copper losses in electrical machines is still a challenging task. Due to high utilization of high power density automotive drives, stray fields in the slots cause a significant copper loss increase compared to DC copper losses. Especially at large cross-sectional areas of the wires up to several times the DC-losses may occur in copper. This paper presents a new method of identifying these additional copper losses in electrical machines directly through measurement...
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