Steady State Thermal Analysis and Design of a Cooling System in an AFPM Motor

Authors: K. Sarrafan, A. Darabi

Abstract:

In this paper, the steady-state temperature of a sample 500 KW two rotor one stator Non-slotted axial flux permanent magnet motor is calculated using the finite element simulator software package. Due to the high temperature in various parts of the machine, especially at stator winding, a cooling system is designed for the motor and the temperature is recalculated. The results show that the temperature obtained for the parts is within the permissible range.

Keywords: Axial Flux, Cooling System, Permanent Magnet, Thermal Analysis.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1077423

References:

[1] D.A Howey, P.R.N. Childs, and A.S. Holmes, "Air-gap convection in rotating electrical machines," IEEE Transactions on Industrial Electronics, vol. 59, pp. 1367-1375, 2012.
[2] Parviainen, Design of Axial-Flux Permanent-Magnet Low-speed Machines and Performance Comparison between Radial-flux and Axial-flux Machines, Thesis for the degree of Doctor of Science (Technology) to be presented with due permission for public examination and criticism in the auditorium 1382 at Lappeenranta University of Technology, Lappeenranta, Finland on the 19th of April, 2005.
[3] J. Gieras, R.J Wang, and M.J. Kamper, Axial Flux Permanent Magnet Brushless Machine. Print ┬®2004 Kluwer Academic Publishers Dordrecht.
[4] Prof. A. Binder, "Large Generators and High Power Drives," part 2.
[5] J. F. Gieras, and M. Wing, Permanent Magnet Motor Technology, Design and Applications, Second edition, Marcel Dekker, Inc., 2002.
[6] J. Daily and R. Nece, "Chamber dimension effects on induced flow and frictional resistance of enclosed rotating disks," ASME J. Basic Eng, vol. 82, pp. 217-232, 1960.
[7] R. Boutarfa and S. Harmand, "Local convective heat transfer for laminar and turbulent flow in a rotor-stator system," Experiments in Fluids, vol. 38, pp. 209-221, 2005.
[8] R. Wang,R.T. Dobson, and M.J. Kamper, "thermo fluid analysis of an Axial Flux Permanent Magnet (AFPM) generator," R & D journal, vol. 17, 2001.
[9] J. Nerg, M. Rilla, and J. Pyrhonen, "Thermal analysis of radial-flux electrical machines with a high power density," IEEE Transactions on Industrial Electronics, 55(10):3543-3554, 2008.
[10] C.E. Tindall B.D.J. Maynes, R.J. Kee and R.G. Kenny, "Simulation of airflow and heat transfer in small alternators using CFD," IEE Proceedings on Electric Power Applications, 150(2):146-152, 2003.