Abstract:
This paper presents an analytical subdomain model for predicting the magnetic field
distributions in three-phase double-stator permanent magnet synchronous machine (DS- PMSM) during open-circuit and on-load conditions. The model is initially derived based on
Laplace’s and Poisson’s equations in polar coordinates by separation of variables technique
in four subdomains, i.e., outer airgap, outer magnet, inner magnet and inner airgap. The
field solutions in each subdomain are obtained by applying the appropriate boundary
conditions and interface conditions. Finite element analysis (FEA) is later deployed to
validate the analytical results in DS-PMSM having different number of slots between outer
and inner stators with a non-overlapping winding arrangement. The analyzed
electromagnetic performances are slotless airgap flux density waveform, back-emf
waveform and output torque waveform. The results show that the proposed analytical
model can accurately predict the magnetic field distributions in DS-PMSM. © 2022, The
Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
