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Lookup NU author(s): Zheng Tan,
Dr Bing Ji,
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Overheating of permanent magnet (PM) machines has become a major technical challenge as it gives rise to magnet demagnetization, degradation of insulation materials, and loss of motor efficiency. This paper proposes a state-of-the-art cooling system for an axial flux permanent magnet (AFPM) machine with the focus on its structural optimization. A computational fluid dynamics (CFD) simulation with thermal consideration has been shown to be an efficient approach in the literature and is thus employed in this work. Meanwhile, a simplified numerical approach to the AFPM machine with complex configuration in 3D consisting of conduction, forced convection, and conjugate heat transfer is taken as a case study. Different simplification methods (including configuration and working conditions) and two optimized fans for forced convection cooling are designed and installed on the AFPM machine and compared to a natural convection cooling system. The results show that the proposed approach is effective for analyzing the thermal performance of a complex AFPM machine and strikes a balance between reasonable simplification, accuracy, and computational resource.
Author(s): Tan Z, Song XG, Ji B, Liu Z, Ma JE, Cao WP
Publication type: Article
Publication status: Published
Journal: Journal of Zhejiang University -Science A
Print publication date: 01/08/2015
Online publication date: 11/08/2015
Acceptance date: 12/02/2015
ISSN (print): 1673-565X
ISSN (electronic): 1862-1775
Publisher: Zhejiang University Press
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