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1015 research outputs found
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Limiting imbalance settlement costs from variable renewable energy sources in the Nordics: Internal balancing vs. balancing market participation
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Experimental and Theoretical Investigation of Gadolinium Oxyhydride (GdHO) Thin Films: Optical, Photocatalytic, and Electronic Properties
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“Physics of Evolving Matter: Connectivity, Communication and Growth” The Geilo School 2023, March 13-23, Geilo, Norway
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Design of a Power-Dense Aviation Motor With a Low-Loss Superconducting Slotted Armature
Get PDFThis article describes the design and analysis of a 2.5-MW, 5000-rpm electric motor with a slotted armature employing REBCO high-temperature superconductors (HTS). The alternating current and field in the armature induces AC losses in the superconductors, requiring cryogenic cooling. Therefore, the aim is to design a machine with sufficiently low losses to make this cooling realistic, which simultaneously outperforms the state-of-the-art. The reasoning behind the key design choices is presented before the model used for two-dimensional (2-D) finite element analysis (FEA) is described. Then, HTS AC losses are studied with the T-A-formulation, examining the impact of various operating conditions. Aligning the HTS tapes with the field was found to successfully reduce AC losses, while filamentization was only successful for more than 10 filaments. The final design had an active torque density of 50.9 Nm/kg and an estimated efficiency of 99.8% when the HTS are operated at 40 K.Design of a Power-Dense Aviation Motor With a Low-Loss Superconducting Slotted ArmaturepublishedVersio
The role of particle precipitation on plasma structuring at different altitudes by in-situ measurements
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Bonding mechanism and magnetic ordering in Laves phase λ1−MgCo2 intermetallic compound from theoretical and experimental studies
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Anharmonicity effects and thermal expansion of thermoelectric (M,M’,M”)NiSn (M,M’,M”=Ti, Zr, Hf) half-Heusler alloys
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Decentralized brokered enabled ecosystem for data marketplace in smart cities towards a data sharing economy
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