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