Sub-Domain Model of Eddy Current Loss in Windings for Flux-Switching Permanent Magnet Machine under Open-Circuit Condition

Performance modifications and design aspects of rotating flux switching permanent magnet machines: a review

“…However, simplifying assumptions have to be adopted, such as infinite iron permeability and neglected end effects. The electromagnetic modelling of FSPMs using Fourier series has been accomplished in no‐load [108–110] and full‐load [111–113] conditions. The flux density in the airgap is calculated using Fourier series [111, 112], the cogging torque [108, 114] and also winding eddy current loss [109] are analytically derived based on sub‐domains.…”

“…The electromagnetic modelling of FSPMs using Fourier series has been accomplished in no‐load [108–110] and full‐load [111–113] conditions. The flux density in the airgap is calculated using Fourier series [111, 112], the cogging torque [108, 114] and also winding eddy current loss [109] are analytically derived based on sub‐domains. This method can be used to model any ratio with an arbitrary number of sub‐domains, in a general formulation [113].…”

Analytical calculation of magnetic field of bearingless flux‐switching permanent‐magnet machine based on doubly‐salient relative permeance method

“…In order to overcome the defects of the FEM, scholars have made a lot of achievements in the field of motor designs in the past few decades, but few research studies related to BFSPMMs are available. However, for the study of BFSPMMs, theoretical analysis methods of motors with the doubly-salient structure such as FSPMMs can be used for reference, including the magnetic equivalent circuit method [16][17][18], Schwarz-Christoffel transform method [19], subdomain model method [20][21][22], and relative permeance method [23,24]. In [16][17][18], the magnetic equivalent circuit method of the FSPMMs and BFSPMMs is introduced.…”

“…In [20], a subdomain model is developed to compute the no‐load and load magnetic field distribution in flux reversal machines. In [21, 22], accurate subdomain models for the FSPMMs are developed. It can be found that the subdomain model method can calculate the magnetic field exactly.…”