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3D thermal analysis of a permanent magnet motor with cooling fans

Lookup NU author(s): Zheng Tan, Dr Bing Ji, Zheng Liu

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Abstract

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.

Publication metadata

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

Year: 2015

Volume: 16

Issue: 8

Pages: 616-621

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

URL: http://dx.doi.org/10.1631/jzus.A1400293

DOI: 10.1631/jzus.A1400293

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