2D Analytical Calculation of Magnetic Field and electromagnetic Torque for Surface-Inset Permanent Magnet Motors

Thierry Lubin (1) , Smail Mezani (1) , Abderrezak Rezzoug (1)

1 GREEN - Groupe de Recherche en Electrotechnique et Electronique de Nancy

The paper deals with a subdomain model for predicting the magnetic field distribution in surface-inset permanent-magnet motors with semi-closed slots under load conditions. Due to the presence of electrical current in the stator slots, a magnetic vector potential formulation is used. The magnetic vector potential distribution in each subdomain (air-gap, stator slots, and rotor slots with inset PMs) is obtained by solving two-dimensional Laplace's and Poisson's equations by the separation of variables method. One of the main contributions of the paper concerns the magnetic vector potential expression in the PMs region. Indeed, PMs are inset into the rotor iron which leads to solve Laplace's equation with nonhomogeneous Neumann boundary conditions. Magnetic field distribution and electromagnetic torque computed with the proposed analytical method are verified with those obtained from finite element analyses.

Mots clés: Analytical calculation; Magnetic field distribution; surface-inset permanent magnet machine; Reluctance torque

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

Thierry Lubin, Smail Mezani, Abderrezak Rezzoug. 2D Analytical Calculation of Magnetic Field and electromagnetic Torque for Surface-Inset Permanent Magnet Motors. IEEE Transactions on Magnetics, 2012, 12 p. ⟨10.1109/TMAG.2011.218091⟩. ⟨hal-00673928⟩