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Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly
2015 Vol.16 No.8 P.616-621
3D thermal analysis of a permanent magnet motor with cooling fans
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.
Key words: Axial flux permanent magnet (AFPM) machine, Computational fluid dynamics (CFD), Cooling fan, Motor drives, Thermal analysis
创新点:æ出一ç§é€‚åˆæ°¸ç£ç”µæœºçƒåˆ†æžçš„CFD仿真模型。
方法:采用计算æµä½“动力å¦æ–¹æ³•å¯¹åŒ…å«å†·å´é£Žæ‰‡çš„æ°¸ç£ç”µæœºè¿›è¡Œç©ºé—´ä¸‰ç»´çƒåŠ›å¦åˆ†æžå’Œä¼˜åŒ–设计。
结论:本文æ出并优化åŽçš„冷å´é£Žæ‰‡å¯æœ‰æ•ˆé™ä½Žæ°¸ç£ç”µæœºçš„最高和平å‡æ¸©åº¦ã€‚
关键è¯ç»„:
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DOI:
10.1631/jzus.A1400293
CLC number:
U264.1
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On-line Access:
2015-08-04
Received:
2014-09-24
Revision Accepted:
2015-02-12
Crosschecked:
2015-07-20