Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings

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Sammanfattning

This paper explores and assesses power loss generation and heat extraction in a stator with directly air-cooled laminated winding. An electrical machine winding made of an electric conducting sheet, which have slotted structure for accommodating a magnetic core, is denoted a laminated winding. A space is introduced between the conducting sheets so that the heating power is removed right where it is created. Explicit to the laminated windings, the conductors with smallest cross section and highest dc resistance have also limited cooling. Since these conductors are closest to the air-gap they become subject to induced power losses. An electrical machine with folded air-cooled laminated winding is built and evaluated. The paper demonstrates on how the thermal management of the stator segments is evaluated and adjusted during the manufacturing process. The power loss estimation of the prototype machine reveals significant discrepancy between the measurements and the calculation of known power losses at no load condition compared to short-circuit conditions. Conjugate heat transfer models are developed to evaluate the coolant flow distribution and heat dissipation in the direct air-cooled laminated windings.

Originalspråkengelska
Titel på värdpublikationProceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018
FörlagIEEE - Institute of Electrical and Electronics Engineers Inc.
Sidor2675-2681
Antal sidor7
ISBN (elektroniskt)9781538624777
DOI
StatusPublished - 2018 okt. 25
Evenemang23rd International Conference on Electrical Machines, ICEM 2018 - Alexandroupoli, Grekland
Varaktighet: 2018 sep. 32018 sep. 6

Konferens

Konferens23rd International Conference on Electrical Machines, ICEM 2018
Land/TerritoriumGrekland
OrtAlexandroupoli
Period2018/09/032018/09/06

Ämnesklassifikation (UKÄ)

  • Annan elektroteknik och elektronik

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