A novel electromagnetic-thermal-fluid bidirectional coupled model considering multiple factors for temperature rise and loss calculation of high current density motor

IF 5 2区 工程技术 Q1 ENGINEERING, MECHANICAL
Ziyi Xu , Yongming Xu , Shuo Yang , Yanbo Wang , Yaodong Wang
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引用次数: 0

Abstract

Conventional thermal prediction models for induction motors typically neglect the iron core resistivity and air thermophysical properties, concentrating solely on the influence of temperature changes on copper resistivity, which therefore results in diminished computation accuracy. For this purpose, a novel electromagnetic-thermal-fluid bidirectional coupled model of an induction motor with high current density is developed, integrating the effects of temperature variations on electromagnetic loss, fluid dynamics, and heat transmission. Results reveal that after considering the temperature effect, the physical properties of air and electromagnetic losses vary considerably. Proposed model works better than traditional ones because it matches experimental results more closely, showing a 12 % increase in accuracy for temperature rise and an even bigger improvement for electromagnetic loss, proving that it is more effective. Moreover, a thorough investigation is conducted to evaluate all physical field characteristics of induction motor. Highest temperature rise is situated in stator winding, with amplitudes up to 116.3K. And the trend and distribution characteristics of temperature rise in the induction motor in all directions are mainly related to the heat source distribution and air temperature variation.
一种考虑多因素的新型电磁-热流双向耦合模型用于大电流密度电机的温升和损耗计算
传统的感应电机热预测模型通常忽略铁芯电阻率和空气热物理性质,只关注温度变化对铜电阻率的影响,因此导致计算精度降低。为此,建立了一种新型的高电流密度感应电动机的电磁-热-流体双向耦合模型,该模型综合了温度变化对电磁损耗、流体动力学和传热的影响。结果表明,考虑温度效应后,空气和电磁损耗的物理性质变化较大。与传统模型相比,该模型与实验结果更接近,对温升的精度提高了12%,对电磁损耗的精度提高更大,证明了该模型的有效性。此外,还进行了深入的研究,以评估感应电动机的所有物理场特性。定子绕组温升最高,温升幅度达116.3 3k。而感应电动机各方向温升的趋势和分布特征主要与热源分布和空气温度变化有关。
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
International Journal of Thermal Sciences
International Journal of Thermal Sciences 工程技术-工程:机械
CiteScore
8.10
自引率
11.10%
发文量
531
审稿时长
55 days
期刊介绍: The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.
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