Purpose The purpose of this paper is to present a precise two-dimensional (2D) analytical approach for forecasting the open-circuit magnetic field distribution in slotted permanent magnet (PM) pseudo direct drive (PDD) machines featuring surface-mounted magnets. Design/methodology/approach Using the method of separation of variables, the Laplace and Poisson equations are solved to determine the radial and tangential components of the magnetic flux density within the inner and outer air gaps. The configuration of the magnets is regarded as radial. Findings An analysis of the outcomes derived from the suggested approach in relation to the results produced by the finite element method (FEM) indicates that, notwithstanding the geometric complexities involved, the formulation of the boundary value problem for predicting the magnetic field is effectively executed. Originality/value The effectiveness and accuracy of the proposed method are evaluated on two distinct sizes of slotted PDD machines. The integration of the presented analytical technique with meta-heuristic methods can be readily used for the optimal design of PDD machines.
Kazerooni et al. (Wed,) studied this question.