Nowadays, electrification in the transportation sector is one of the most viable solutions to reduce CO2 emissions and meet fuel economy requirements. Being the electrical machine one of the most important players in this electrification trend, extensive research is currently being dedicated to the improvement of their efficiency and power density. In automotive applications, hairpin technologies are widely spreading due to their potential in reducing costs and life cycles in a mass production perspective, as well as in increasing the torque capabilities of machines. However, several challenges need to be addressed before the complete replacement of random windings with hairpins can take place. Of these challenges, the loss produced during high frequency operations is one of the most limiting. This paper aims at studying and investigating high frequency (AC) losses for different slot geometries and conductor cross sections, which in turn involve the analysis of different slots-per-pole-per-phase / layers-per-slot combinations. In addition, the effects on the AC losses of reducing the slot fill factor are studied, either by removing the closest conductors to the slot opening or by reducing the hairpin legs' height. Analytical and numerical models are employed to investigate these concepts.

Hairpin windings: Sensitivity analysis and guidelines to reduce ac losses / Preci, E.; Gerada, D.; Degano, M.; Buticchi, G.; Gerada, C.; Nuzzo, S.; Barater, D.. - (2021), pp. 82-87. ((Intervento presentato al convegno 2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2021 tenutosi a ita nel 2021 [10.1109/WEMDCD51469.2021.9425643].

Hairpin windings: Sensitivity analysis and guidelines to reduce ac losses

Nuzzo S.;Barater D.
2021

Abstract

Nowadays, electrification in the transportation sector is one of the most viable solutions to reduce CO2 emissions and meet fuel economy requirements. Being the electrical machine one of the most important players in this electrification trend, extensive research is currently being dedicated to the improvement of their efficiency and power density. In automotive applications, hairpin technologies are widely spreading due to their potential in reducing costs and life cycles in a mass production perspective, as well as in increasing the torque capabilities of machines. However, several challenges need to be addressed before the complete replacement of random windings with hairpins can take place. Of these challenges, the loss produced during high frequency operations is one of the most limiting. This paper aims at studying and investigating high frequency (AC) losses for different slot geometries and conductor cross sections, which in turn involve the analysis of different slots-per-pole-per-phase / layers-per-slot combinations. In addition, the effects on the AC losses of reducing the slot fill factor are studied, either by removing the closest conductors to the slot opening or by reducing the hairpin legs' height. Analytical and numerical models are employed to investigate these concepts.
2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2021
ita
2021
82
87
Preci, E.; Gerada, D.; Degano, M.; Buticchi, G.; Gerada, C.; Nuzzo, S.; Barater, D.
Hairpin windings: Sensitivity analysis and guidelines to reduce ac losses / Preci, E.; Gerada, D.; Degano, M.; Buticchi, G.; Gerada, C.; Nuzzo, S.; Barater, D.. - (2021), pp. 82-87. ((Intervento presentato al convegno 2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2021 tenutosi a ita nel 2021 [10.1109/WEMDCD51469.2021.9425643].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1246445
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