Analytical Prediction of Magnetic Field in Parallel Double excitation and Spoke-Type Permanent-Magnet Machines Accounting for Tooth-Tips and Shape of Polar Pieces

Kamel Boughrara (1) , Rachid Ibtiouen (2) , Thierry Lubin (3)

1 Laboratoire de l'Energie et des Systèmes Intelligents LESI
2 LRE - Laboratoire de recherche en électrotechnique [USTHB, Alger]
3 GREEN - Groupe de Recherche en Electrotechnique et Electronique de Nancy

This paper presents an analytical method based on subdomain method for the computation of open circuit, armature reaction and on-load magnetic field distribution in integer slot winding parallel double excitation and Spoke-Type tangential permanent-magnet machines. The proposed model takes into account for stator and rotor slots tooth tips and shape of polar piece. A 2D exact analytical solution of magnetic field distribution is established. It involves solution of Laplace's and Poisson's equations in semi-closed stator and rotor slots, airgap, buried permanent magnets into rotor semi-closed slots, and non magnetic region under magnets. Obtained exact analytical results of open circuit, armature reaction and on-load magnetic field distribution are verified with those issued from finite element method (FEM)

Mots clés: Exact analytical calculation; finite element method; magnetic field distribution; parallel double excitation; Spoke-Type permanent magnet machines

Domaines: Energie électrique; Electromagnétisme; Supraconductivité [cond-mat.supr-con]

Kamel Boughrara, Rachid Ibtiouen, Thierry Lubin. Analytical Prediction of Magnetic Field in Parallel Double excitation and Spoke-Type Permanent-Magnet Machines Accounting for Tooth-Tips and Shape of Polar Pieces. IEEE Transactions on Magnetics, 2012, 18 p. ⟨10.1109/TMAG.2012.2186587⟩. ⟨hal-00673949⟩