Design and optimization of the jet cooling structure for permanent magnet synchronous motor

IF 6.1 2区工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2024-11-23 DOI:10.1016/j.applthermaleng.2024.125051

Jianjun Hu, Zutang Yao, Yuntong Xin, Zhicheng Sun

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Abstract

Permanent magnet synchronous motor (PMSM) is widely used in electric vehicles due to its high power density and wide speed range. However, when operating under long-term heavy load conditions, PMSM is prone to heat accumulation. It’s difficult to cool the motor with existing indirect cooling structures efficiently, which may lead to its high temperature and result in winding burnout or even permanent demagnetization of the magnets. In this paper, a novel cooling structure based on jet cooling is proposed to reduce the operating temperature of the PMSM efficiently and improve its stability. The temperature field model, which accounts for the influence of end windings, is developed to analyze and optimize the parameters of the jet cooling structure, leading to the determination of an optimal parameter set. By exploring the cooling effects of motors with different cooling structures under stable, extreme and mixed cycle operating conditions, it is proved that the jet cooling structure designed in this paper can effectively reduce the temperature of the motor and ensure its reliable operation. The results show that with the influence of the jet cooling structure designed in this paper, the maximum temperatures of the rotor and winding are reduced by 35.2℃ and 44.5℃ respectively.

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永磁同步电机喷流冷却结构的设计与优化

永磁同步电机（PMSM）具有功率密度高、转速范围广的特点，因此被广泛应用于电动汽车中。然而，在长期重负载条件下运行时，PMSM 容易积聚热量。现有的间接冷却结构很难对电机进行有效冷却，这可能会导致电机温度过高，造成绕组烧毁，甚至磁体永久退磁。本文提出了一种基于喷射冷却的新型冷却结构，以有效降低 PMSM 的工作温度并提高其稳定性。本文开发了温度场模型，该模型考虑了端部绕组的影响，用于分析和优化喷流冷却结构的参数，从而确定了最佳参数集。通过探讨不同冷却结构的电机在稳定、极端和混合循环运行条件下的冷却效果，证明本文设计的喷流冷却结构能有效降低电机温度，确保电机可靠运行。结果表明，在本文设计的喷流冷却结构的影响下，转子和绕组的最高温度分别降低了 35.2℃和 44.5℃。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.