Development of closed-form solutions for fast thermal modeling of rotating electric machinery

Buyukdegirmenci, Veysel T.; Magill, Matthew P.; Nategh, Shafigh; Krein, P.T.

doi:10.1109/iemdc.2013.6556189

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…However, the model developed in Dubas and Boughrara (2017a) and Dubas and Boughrara (2017b) does not take into account the heat transfer by radiation and the losses in the stator are calculated uniformly, without calculating separately the losses in the stator teeth and yoke. The same remark can be made for the heat transfer by radiation in Buyukdegirmenci et al (2013a)), Buyukdegirmenci et al (2013b), Grobler et al (2013) and Grobler et al (2015).…”

mentioning

confidence: 66%

“…In the thermal analysis of electrical machines, except for the approaches mentioned previously, there are few attempts in previous research studies to develop other methods based on the analytical calculation of heat transfer using the formal resolution of the thermal partial differential equation (PDE). Buyukdegirmenci et al (2013a) developed a closed-form solution (namely, multi-layer model based on Poisson's and Laplace's equations) for the steady-state stator temperature distribution over one slot pitch in a radial air-gap electrical machine. Only two homogeneous layers have been used (i.e.…”

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confidence: 99%

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Two-dimensional steady-state thermal analytical model of permanent-magnet synchronous machines operating in generator mode

Djelloul-Khedda

Boughrara

Dubas

et al. 2021

COMPEL

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Purpose Thermal analysis of electrical machines is usually performed by using numerical methods or lumped parameter thermal networks depending on the desired accuracy. The analytical prediction of temperature distribution based on the formal resolution of thermal partial differential equations (PDEs) by the harmonic modeling technique (or the Fourier method) is uncommon in electrical machines. Therefore, this paper aims to present a two-dimensional (2D) analytical model of steady-state temperature distribution for permanent-magnet (PM) synchronous machines (PMSM) operating in generator mode. Design/methodology/approach The proposed model is based on the multi-layer models with the convolution theorem (i.e. Cauchy’s product theorem) by using complex Fourier’s series and the separation of variables method. This technique takes into the different thermal conductivities of the machine parts. The heat sources are determined by calculating the different power losses in the PMSM with the finite-element method (FEM). Findings To validate the proposed analytical model, the analytical results are compared with those obtained by thermal FEM. The comparisons show good results of the proposed model. Originality/value A new 2D analytical model based on the PDE in steady-state for full prediction of temperature distribution in the PMSM takes into account the heat transfer by conduction, convection and radiation.

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confidence: 66%

mentioning

confidence: 99%

Two-dimensional steady-state thermal analytical model of permanent-magnet synchronous machines operating in generator mode

Djelloul-Khedda

Boughrara

Dubas

et al. 2021

COMPEL

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“…Fast and flexible thermal solvers and parallel computing makes it possible to rapidly and accurately predict an EM's thermal response in PEV applications. With knowledge of the temperature, an effective cooling system can be developed [178][179][180][181].…”

Section: Thermal Models and Performance Analysis Of The Emsmentioning

confidence: 99%

Limitations/capabilities of electric machine technologies and modeling approaches for electric motor design and analysis in plug-in electric vehicle applications

Yılmaz

2015

Renewable and Sustainable Energy Reviews

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“…These are particularly important in identification of the winding hot-spot. It is important to note that the thermal anisotropy is frequently neglected in thermal analysis of electrical machines where a lower resolution or coarse modelling approach is employed [1]- [3], [34]- [36], [57]- [59]. Fig.…”

Section: A Materials Thermal Datamentioning

confidence: 99%

“…Experimental approaches commonly involve ac tests with three-phase current excitation. The mean winding temperature is often manually controlled by applying an additional excitation current or placing the sample in a thermal chamber in-between test points, in order to get some insight into the temperature/loss interdependence [33], [34]. An insight into the ac power loss is obtained, and a comparison with FE results allows for an accurate calibration of the thermal and electromagnetic models.…”

Section: Stator Assemblymentioning

confidence: 99%

Experiment informed methodology for thermal design of PM machines

Ayat

Wróbel

Goss

et al. 2016

2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

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The common approach used in the thermal design of electrical machines is calibrating thermal models based on the designer's previous experience, or hardware tests on a prototype machine. This allows for various manufacture and assembly nuances to be accounted for in the design process, assuring accurate and computationally efficient predictions of the machine thermal behaviour. The post-manufacture calibration of thermal models from tests on a complete machine has limited use in development of machine topologies, where no previous experience or machine hardware exist. In this context, an experiment informed design technique that makes use of reduced order machine sub-assemblies presents an attractive alternative. In particular, the hardware manufacture cost and time is significantly reduced compared to the prototyping of the complete machine assembly. This allows for numerous hardware samples to be constructed and tested, to inform the machine design process. The use of the machine sub-assembly testing is focused, but not limited to identifying and quantifying various power loss and heat transfer phenomena. This paper reviews the applicability of the sub-assembly testing in a broader context of the machine design. The aim of the research focuses on formulating a basis for sub-assembly based, experiment informed methodology for the thermal design of electrical machines.

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Development of closed-form solutions for fast thermal modeling of rotating electric machinery

Cited by 4 publications

References 13 publications

Two-dimensional steady-state thermal analytical model of permanent-magnet synchronous machines operating in generator mode

Two-dimensional steady-state thermal analytical model of permanent-magnet synchronous machines operating in generator mode

Limitations/capabilities of electric machine technologies and modeling approaches for electric motor design and analysis in plug-in electric vehicle applications

Experiment informed methodology for thermal design of PM machines

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