Airflow Cooling Mechanism for High Power-Density Permanent Magnet Motor

IF 5.2 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Open Journal of the Industrial Electronics Society Pub Date : 2024-01-31 DOI:10.1109/OJIES.2024.3360509

Awungabeh Flavis Akawung;Besong John Ebot;Yasutaka Fujimoto

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引用次数: 0

Abstract

High power-density electric machines present the benefits of high torque and speed. However, this generally comes with heating problems characterized by high temperatures that affect performance. Conventional approaches to address overheating are to include cooling fans or jackets within the stator core of the machine. This approach is challenging to implement in small-size high power-density machines. In this article, a cooling mechanism integrated in the rotor of a high power-density permanent magnet motor is proposed. It comprises a set of six holes, shrouded within a hollow shaft. The mechanism is based on conditioning air due to a centrifugal force that is produced by the rotational speed of the rotor from the inlet. A theoretical model based on flow resistance network is proposed to analyze the airflow rate. An analytical thermal model based on lumped parameter thermal network is developed to analyze the effect of the flow rate on the temperature distribution in the motor. Also, a simulation analysis model was conducted using computational fluid dynamics to analyze the effect of air flowing in the motor. An experimental prototype is developed to verify, validate, and evaluate the proposed cooling model. The cooling system is effective in reducing temperatures from speeds above 6000 min ⁻¹ .

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用于高功率密度永磁电机的气流冷却机制

高功率密度电机具有高扭矩和高速度的优点。然而，这通常伴随着发热问题，其特点是高温影响性能。解决过热问题的传统方法是在机器定子铁芯内安装冷却风扇或冷却夹套。这种方法在小型高功率密度机器中实施具有挑战性。本文提出了一种集成在高功率密度永磁电机转子中的冷却机制。它由一组六个孔组成，护罩在空心轴内。该机构基于转子转速产生的离心力从进气口调节空气。我们提出了一个基于流阻网络的理论模型来分析气流速率。建立了一个基于叠加参数热网络的分析热模型，以分析流速对电机内温度分布的影响。此外，还使用计算流体动力学建立了一个模拟分析模型，以分析马达中空气流动的影响。为了验证、确认和评估所提出的冷却模型，还开发了一个实验原型。冷却系统能有效降低转速超过 6000 min-1 时的温度。

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

IEEE Open Journal of the Industrial Electronics Society ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

10.80

自引率

2.40%

发文量

审稿时长

12 weeks

期刊介绍： The IEEE Open Journal of the Industrial Electronics Society is dedicated to advancing information-intensive, knowledge-based automation, and digitalization, aiming to enhance various industrial and infrastructural ecosystems including energy, mobility, health, and home/building infrastructure. Encompassing a range of techniques leveraging data and information acquisition, analysis, manipulation, and distribution, the journal strives to achieve greater flexibility, efficiency, effectiveness, reliability, and security within digitalized and networked environments. Our scope provides a platform for discourse and dissemination of the latest developments in numerous research and innovation areas. These include electrical components and systems, smart grids, industrial cyber-physical systems, motion control, robotics and mechatronics, sensors and actuators, factory and building communication and automation, industrial digitalization, flexible and reconfigurable manufacturing, assistant systems, industrial applications of artificial intelligence and data science, as well as the implementation of machine learning, artificial neural networks, and fuzzy logic. Additionally, we explore human factors in digitalized and networked ecosystems. Join us in exploring and shaping the future of industrial electronics and digitalization.