Release Time:2019-03-09  Hits:

Indexed by: Journal Papers

Date of Publication: 2015-08-01

Journal: JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A

Included Journals: Scopus、ISTIC、EI、SCIE

Volume: 16

Issue: 8

Page Number: 616-621

ISSN: 1673-565X

Key Words: Axial flux permanent magnet (AFPM) machine; Computational fluid dynamics (CFD); Cooling fan; Motor drives; Thermal analysis

Summary: 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.