Title :
Analytical modelling of the magnetic field in axial flux permanent magnet machines with semi-closed slots at no load
Author :
Bellara, A. ; Amara, Y. ; Barakat, G. ; Reghem, P.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Le Havre, Le Havre, France
Abstract :
This paper presents an analytical solution for prediction of the no-load magnetic field in slotted semi-closed permanent magnet axial flux synchronous machines. The technique is based on 2-D solution of the Maxwell´s equations using the separation of variables method, this technique is validated for two different machines. The magnetic field expressions are developed in slots regions, magnetic airgap region, slot opening region and permanent magnet region leading to an exact calculation of the slot effects on the airgap magnetic quantities. Results from this analytical model are compared to corresponding finite element analyses (FEA).
Keywords :
Maxwell equations; finite element analysis; permanent magnet machines; synchronous machines; FEA; Maxwell equations; airgap magnetic quantities; finite element analyses; magnetic airgap region; no-load magnetic field; permanent magnet axial flux synchronous machines; permanent magnet region; semi-closed slots; slot opening region; slots regions; variables method; Boundary conditions; Forging; Magnetic separation; Permanent magnets; Rotors; Torque; analytical solution; axial flux; cogging torque; electromotive force (EMF); finite element analysis; magnetic field; semi-closed slots; slotting effect; surface mounted permanent magnet;
Conference_Titel :
Electrical Machines (ICEM), 2010 XIX International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4174-7
Electronic_ISBN :
978-1-4244-4175-4
DOI :
10.1109/ICELMACH.2010.5607988
