A comprehensive analytical subdomain model and its field solutions for surface-mounted permanent magnet machines

Tiang, Tow Leong, Ishak, Dahaman, Lim, Chee Peng and Jamil, Mohamad Kamarol Mohd 2015, A comprehensive analytical subdomain model and its field solutions for surface-mounted permanent magnet machines, IEEE transactions on magnetics, vol. 51, no. 4, pp. 1-14, doi: 10.1109/TMAG.2014.2361484.

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Title A comprehensive analytical subdomain model and its field solutions for surface-mounted permanent magnet machines
Author(s) Tiang, Tow Leong
Ishak, Dahaman
Lim, Chee PengORCID iD for Lim, Chee Peng orcid.org/0000-0003-4191-9083
Jamil, Mohamad Kamarol Mohd
Journal name IEEE transactions on magnetics
Volume number 51
Issue number 4
Start page 1
End page 14
Total pages 14
Publisher IEEE
Place of publication Piscataway, N.J.
Publication date 2015-04
ISSN 0018-9464
Keyword(s) Analytical solution
permanent magnet
slotting effect
subdomain model
Summary This paper presents a comprehensive analytical subdomain model together with its field solutions for predicting the magnetic field distributions in surface-mounted permanent magnet (PM) machines. The tooth tips and slotting effects during open-circuit, armature reaction, and on-load conditions are considered when deriving the model and developing its solutions. The model derivations and field solutions are extended from a previous model, and can be applied to PM machines with any combinations of slot and pole numbers and any magnetization patterns in the magnets. This model is initially formulated according to Laplace's and Poisson's equations in 2-D polar coordinates by the separation of variables technique in four subdomains, such as magnet, airgap, winding slots, and slot-openings. The field solution of each subdomain is obtained applying the appropriate boundary conditions and interface conditions between every two subdomains, respectively, which can precisely account for the mutual influence between slots. Finite element analysis (FEA) is later deployed to validate the analytical results in a surface-mounted PM machine that has nonoverlapping winding arrangement. For validation purposes, PM machines having 3-slot/2-pole with parallel magnetization and 12-slot/10-pole with either parallel or radial magnetizations are used for comparisons. Computation of global quantities for the motor which include the phase back-EMF and cogging torque is also included. The results indicate that the proposed analytical model can accurately predict the magnetic field distributions in each subdomain and the motor's global quantities, which are in good agreement with those obtained from the FEA.
Language eng
DOI 10.1109/TMAG.2014.2361484
Field of Research 090607 Power and Energy Systems Engineering (excl Renewable Power)
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, IEEE
Persistent URL http://hdl.handle.net/10536/DRO/DU:30074969

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