Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines
Thermal loading can induce mechanical stresses in the windings of electrical machines, especially those impregnated with epoxy resins, which is mostly the case in modern traction motors. Although designers look for cooling techniques that give better performance in terms of the power density and eff...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/10/1967 |
| _version_ | 1798042627165126656 |
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| author | Bishal Silwal Abdalla Hussein Mohamed Jasper Nonneman Michel De Paepe Peter Sergeant |
| author_facet | Bishal Silwal Abdalla Hussein Mohamed Jasper Nonneman Michel De Paepe Peter Sergeant |
| author_sort | Bishal Silwal |
| collection | DOAJ |
| description | Thermal loading can induce mechanical stresses in the windings of electrical machines, especially those impregnated with epoxy resins, which is mostly the case in modern traction motors. Although designers look for cooling techniques that give better performance in terms of the power density and efficiency of the machine, several thermal cycles can lead to fatigue and the degradation of the copper insulation, epoxy and consequently the windings. In this paper, the performance of different cooling techniques has been compared based on the temperature distribution and the mechanical stress induced in the windings. Three-dimensional finite element thermo-mechanical models were built to perform the study. Two different variants of water jacket cooling, two configurations of direct coil cooling and two cases of combined water jacket and direct coil cooling methods have been considered in the paper. The results show that the combined water jacket and direct coil cooling perform the best in terms of the temperature and also the mechanical stress induced in the windings. An experimental set-up is built and tested to validate the numerical results. |
| first_indexed | 2024-04-11T22:38:04Z |
| format | Article |
| id | doaj.art-e21d64129d2b4d02ad88d6ba86ca3559 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T22:38:04Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-e21d64129d2b4d02ad88d6ba86ca35592022-12-22T03:59:09ZengMDPI AGEnergies1996-10732019-05-011210196710.3390/en12101967en12101967Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical MachinesBishal Silwal0Abdalla Hussein Mohamed1Jasper Nonneman2Michel De Paepe3Peter Sergeant4Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, 9000 Ghent, BelgiumDepartment of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, 9000 Ghent, BelgiumEEDT-Flanders Make, The Strategic Research Center for the Manufacturing Industry, B-9052 Gent, BelgiumEEDT-Flanders Make, The Strategic Research Center for the Manufacturing Industry, B-9052 Gent, BelgiumDepartment of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, 9000 Ghent, BelgiumThermal loading can induce mechanical stresses in the windings of electrical machines, especially those impregnated with epoxy resins, which is mostly the case in modern traction motors. Although designers look for cooling techniques that give better performance in terms of the power density and efficiency of the machine, several thermal cycles can lead to fatigue and the degradation of the copper insulation, epoxy and consequently the windings. In this paper, the performance of different cooling techniques has been compared based on the temperature distribution and the mechanical stress induced in the windings. Three-dimensional finite element thermo-mechanical models were built to perform the study. Two different variants of water jacket cooling, two configurations of direct coil cooling and two cases of combined water jacket and direct coil cooling methods have been considered in the paper. The results show that the combined water jacket and direct coil cooling perform the best in terms of the temperature and also the mechanical stress induced in the windings. An experimental set-up is built and tested to validate the numerical results.https://www.mdpi.com/1996-1073/12/10/1967cooling methodsdirect coil coolingelectrical machinesmechanical stresstemperaturethermal analysiswater jacket cooling |
| spellingShingle | Bishal Silwal Abdalla Hussein Mohamed Jasper Nonneman Michel De Paepe Peter Sergeant Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines Energies cooling methods direct coil cooling electrical machines mechanical stress temperature thermal analysis water jacket cooling |
| title | Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines |
| title_full | Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines |
| title_fullStr | Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines |
| title_full_unstemmed | Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines |
| title_short | Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines |
| title_sort | assessment of different cooling techniques for reduced mechanical stress in the windings of electrical machines |
| topic | cooling methods direct coil cooling electrical machines mechanical stress temperature thermal analysis water jacket cooling |
| url | https://www.mdpi.com/1996-1073/12/10/1967 |
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