Modeling, analysis, and optimization of the asymmetric cooling system for a hybrid oil-cooled motor

IF 6.1 2区 工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2025-03-13 DOI:10.1016/j.applthermaleng.2025.126215
Yifei Jiang , Yingtao Lu , Long Chen , Enlai Zheng , Chong Wang , Zhitao Luo , Yinyan Shi , Xiaochan Wang , Lianglong Hu , Shanhu Zhao
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Abstract

To address the issues of uneven oil distribution and excessive local temperature rise in oil-cooled Permanent Magnet Synchronous Motors (PMSMs), a novel triple-pipe cooling structure with double-hole nozzles is developed in this article. Then, an asymmetric 3D thermal network model is proposed considering the temperature dependence of oil parameters and air gap friction loss to accurately describe the motor’s temperature distribution. Compared to traditional models, the proposed model demonstrates a 35 % improvement in accuracy. Next, the effects of the cooling structure and medium on the motor’s temperature distribution are analyzed. The results indicate that the winding temperature with the dual-hole and triple-pipe configuration is reduced by 32.96 %, 28.04 %, and 3.97 % compared to the single-hole single-pipe, dual-hole single-pipe, and dual-hole dual-pipe structures, respectively. The winding temperature with the cooling medium of Mobil oil is lower by 0.99 % and 3.29 % compared to ATF oil and Engine oil respectively. Furthermore, to optimize the cooling structure, a two-layer multi-objective optimization method is proposed with the employment of Taguchi’s method and Grey Fuzzy Logic. Finally, the optimized prototype of the motor is fabricated, and the experimental platform is developed. Experimental results indicate that the proposed optimization method can effectively improve the heat dissipation performance of the motor cooling structure. The optimized PMSM temperature decreases by 5.5 % under steady-state condition, and by 10.35 % and 10.92 % for stator and winding temperature under transient condition, respectively.

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为了解决油冷永磁同步电机(PMSM)中油分布不均匀和局部温升过高的问题,本文开发了一种新型的双孔喷嘴三管道冷却结构。然后,考虑到油参数和气隙摩擦损耗的温度依赖性,提出了非对称三维热网络模型,以准确描述电机的温度分布。与传统模型相比,该模型的精确度提高了 35%。接下来,分析了冷却结构和介质对电机温度分布的影响。结果表明,与单孔单管、双孔单管和双孔双管结构相比,双孔三管结构的绕组温度分别降低了 32.96 %、28.04 % 和 3.97 %。与 ATF 油和发动机油相比,以美孚油为冷却介质的绕组温度分别降低了 0.99 % 和 3.29 %。此外,为了优化冷却结构,还提出了一种双层多目标优化方法,并采用了田口方法和灰色模糊逻辑。最后,制作了优化后的电机原型,并开发了实验平台。实验结果表明,所提出的优化方法能有效改善电机冷却结构的散热性能。优化后的 PMSM 温度在稳态条件下降低了 5.5%,定子和绕组温度在瞬态条件下分别降低了 10.35% 和 10.92%。
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来源期刊
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
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