Maximization of No-Load Density in Surface Mounted Permanent Magnet Motor

Frédéric Dubas (1) , Christophe Espanet (1) , A. Miraoui (2)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 SET - Laboratoire Systèmes et Transports

An exact two-dimensional (2-D) analytical model (AM) of slotless permanent magnet (PM) machines in polar coordinates is used to determine the analytical equations of the air-gap flux density at no-load operation. The authors show that, for a radial magnetization, there is an optimal magnet thickness which permits to maximize the noload flux density. In order to use easily and directly this optimal value during the design of surface mounted PM motors (SMPMM), the authors propose an original analytical expression of this maximum magnet thickness that have been obtained by interpolation of the values given by several analytical computations. This interpolation function could be applied to SMPMM having a parallel or radial magnetization direction.

Domaines: Energie électrique; Electromagnétisme

Frédéric Dubas, Christophe Espanet, A. Miraoui. Maximization of No-Load Density in Surface Mounted Permanent Magnet Motor. International Conference on Electrical Machines (ICEM), Apr 2004, Cracovia, Poland. pp.01-06. ⟨hal-00322437⟩