Title :
Analytical modelling of unbalanced magnetic pull in isotropic electrical machines
Author :
Gerlando, Antonino Di ; Foglia, Giovanni Maria ; Perini, Roberto
Author_Institution :
Dept. of Electr. Eng., Politec. di Milano, Milano
Abstract :
The phenomenon of the unbalanced magnetic pull is analytically modelled, referring to cylindrical rotor A.C. machines. Even if under some simplifications (sinusoidal space distribution of the current density, no slotting, no saturation, no parallel paths), various compact and significant expressions of field and force are obtained, for any number of pole pairs: the model is based on a critical re-formulation of the air-gap m.m.f., by discussing the homopolar term. Some FEM simulations confirm the soundness of the proposed approach.
Keywords :
AC machines; air gaps; finite element analysis; rotors; FEM simulation; air-gap m.m.f reformulation; cylindrical rotor AC machine; finite element method; isotropic electrical machine; unbalanced magnetic pull modelling; Air gaps; Analytical models; Current density; Machine windings; Magnetic analysis; Magnetic flux; Magnetic levitation; Rotors; Saturation magnetization; Stator windings;
Conference_Titel :
Electrical Machines, 2008. ICEM 2008. 18th International Conference on
Conference_Location :
Vilamoura
Print_ISBN :
978-1-4244-1735-3
Electronic_ISBN :
978-1-4244-1736-0
DOI :
10.1109/ICELMACH.2008.4799998
