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Regenerative Testing of a Concentrated-Winding Permanent-Magnet Synchronous Machine for Offshore Wind Generation—Part II: Test Implementation and Results

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4 Author(s)
Luise, F. ; R&D Dept., Ansaldo Sist. Ind., Monfalcone, Italy ; Pieri, S. ; Mezzarobba, M. ; Tessarolo, A.

The on-load factory testing of high-power electric machines may be a challenge due to the large mechanical equipment required to drive or load them. In a companion paper, a regenerative full-load testing strategy has been proposed, where the power flows in a closed loop between the electric machine and a dual-stage converter so that only the power corresponding to system losses needs to be supplied by the test facility and no mechanical equipment is needed. In this paper, the implementation of such testing strategy on a 780-kW 14-r/min permanent-magnet alternator with fractional-slot concentrated stator winding is described. Test results are presented and compared with the predictions made in Part I, showing a satisfactory accordance between theoretical and experimental results.

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Industry Applications, IEEE Transactions on  (Volume:48 ,  Issue: 6 )