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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Micallef, Christopher
Languages: English
Types: Unknown

Classified by OpenAIRE into

arxiv: Physics::Fluid Dynamics
The fluid flow field and temperature distribution within the end region of a Totally Enclosed Fan Cooled (TEFC) induction motor have been investigated both experimentally and using Computational Fluid Dynamics (CFD) techniques, in order to improve the thermal performance. The flow field and the distribution of heat transfer coefficients over the end windings and internal surfaces (mainly frame and end shield) are characterised for a typical end region configuration. This is then used as a base case in order to investigate the impact configuration changes have on the fluid flow field and heat transfer characteristics in the end region of TEFC induction motors. Common parameters governing the flow field inside the end region are varied, allowing recommendations for improved design and further research recommendations to be made. CFD techniques are successfully applied to model the end region, including the copper where the heat generated is a function of temperature. Through these numerical techniques a good understanding of the flow field was made possible which enabled the author to propose and test configuration changes which improve the heat transfer characteristics in the region. These changes were validated experimentally.
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    • 3 Chin, Y.K., Nordlund, E. and Staton, D.A., 2003. Thermal Analysis - Lumped-Circuit Model and Finite Element Analysis. IPEC 2003, The sixth International Power Engineering Conference, Singapore, 27-29 November, 2003. pp 1019-1024.
    • 5 Di Gerlando, A. and Vistoli, I., 1994. Thermal networks of induction motors for steady state and transient operation analysis. ICEM 1994, Proceeding of the International Conference on Electrical Machines, Paris, September 1994, pp 452-457.
    • 6 Staton, D, Pickering S and Lampard, D., 2001. Recent advancement in the thermal design of electric motors. SMMA 2001 Fall Technical Conference “Emerging Technologies for Electric Motion Industry”, Durham, North Carolina, 3-5 October 2001.
    • 17 Toth, K., 1980. Examination of heat transfer conditions of finned motor case for shell-heated motors. Periodica Polytechnica, Electrical Engineering, Vol. 24, No. 3-4, 1980. pp 169-178
    • 18 Roberts, T.J., 1969-70. Determination of the thermal constants of the heat flow equations of electrical machines. Proceedings IMechE, Vol 184, Part 3E, 1969-70. pp84-92.
    • 19 Zautner, F.L., Feigel'man, I.I., Andrezheiko, M.M. and Borisovich, V.I., 1965. Optimum length of cooling vanes in the squirrel-cage rotor of explosion proof induction motors. Elektrotekhnika, Vol. 36, No. 7, 1965. pp 47-49.
    • 33 Sun, Z., Lindblad, K., Chew, J. W. and Young, C.,2006. LES and RANS investigations into bouyancy-affected convection in a rotating cavity with a central axial throughflow. Proceedings of GT2006, ASME Turbo Expo 2006: Power for Land, Sea and Air, Barcelona, Spain, May 2006.
    • 34 Micallef, C., Pickering, S. J., Simmons, K. and Bradley, K., 2005. Improvements in air flow in the end region of a large totally enclosed fan cooled induction motor. Proc. of IEMDC'05 IEEE International Electric Machines and Drives Conference, San Antonio, Texas, USA, May 2005.
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