Magnet Shape Optimization of Two-Layer Spoke-Type Axial Flux Interior Permanent Magnet Machines

Feng Chai, Yunlong Bi and Yulong Pei
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Feng Chai: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Yunlong Bi: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Yulong Pei: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China

Energies, 2017, vol. 11, issue 1, 1-14

Abstract: In this paper, the two-layer spoke-type (TLST) axial flux interior permanent magnet (AFIPM) machine is proposed. Simple flux barriers are added to optimize the air gap flux density, in which way there is no need to change the surface of the rotor. The optimization principle is revealed and the advantages of the TLST AFIPM machine compared with the spoke-type (ST) AFIPM machine are clarified. An optimization design process based on magnetic equivalent circuit combined with idealized and improved air gap flux density waveform is proposed, in which way the calculation time is saved by avoiding an excess of finite element method (FEM) simulations. Finally, 3D FEM simulation is adopted to verify the optimization results.

Keywords: axial flux interior permanent magnet machine; air gap flux density; two-layer spoke-type permanent magnet; flux barrier (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
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