Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings
(2018) 23rd International Conference on Electrical Machines, ICEM 2018 p.2675-2681- Abstract
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... (More)
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.
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- author
- Reinap, A. LU ; Hogmark, C. LU ; Marquez-Fernandez, F. J. LU ; Alakiila, M. LU and Andersson, M. LU
- organization
- publishing date
- 2018-10-25
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Conjugate heat transfer, Cooling integration, Distributed concentrated windings, Finite element method, Laminated windings
- host publication
- Proceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018
- article number
- 8506732
- pages
- 7 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- 23rd International Conference on Electrical Machines, ICEM 2018
- conference location
- Alexandroupoli, Greece
- conference dates
- 2018-09-03 - 2018-09-06
- external identifiers
-
- scopus:85057195542
- ISBN
- 9781538624777
- DOI
- 10.1109/ICELMACH.2018.8506732
- language
- English
- LU publication?
- yes
- id
- 9eb6603f-930c-4773-94e6-c713a6d2c047
- date added to LUP
- 2018-12-04 09:57:11
- date last changed
- 2022-09-23 08:40:32
@inproceedings{9eb6603f-930c-4773-94e6-c713a6d2c047, abstract = {{<p>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.</p>}}, author = {{Reinap, A. and Hogmark, C. and Marquez-Fernandez, F. J. and Alakiila, M. and Andersson, M.}}, booktitle = {{Proceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018}}, isbn = {{9781538624777}}, keywords = {{Conjugate heat transfer; Cooling integration; Distributed concentrated windings; Finite element method; Laminated windings}}, language = {{eng}}, month = {{10}}, pages = {{2675--2681}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, title = {{Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings}}, url = {{http://dx.doi.org/10.1109/ICELMACH.2018.8506732}}, doi = {{10.1109/ICELMACH.2018.8506732}}, year = {{2018}}, }