Thermal Modeling of Directly Cooled Electric Machines Using Lumped Parameter and Limited CFD Analysis

Nategh, Shafigh; Huang, Zhe; Krings, Andreas; Wallmark, Oskar; Leksell, Mats

doi:10.1109/tec.2013.2283089

Cited by 121 publications

(53 citation statements)

References 19 publications

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“…Under the preliminary hypothesis of constant current I, the system is time-invariant, and the general solution of (5) at the generic time t is given by (8), where 0 is the initial time.…”

Section: Lptn Analytical Solutionmentioning

confidence: 99%

“…In order to mitigate this risk, an accurate thermal model is an essential tool for predicting the temperature distribution in the motor. While finite element (FE) and computational fluid dynamics (CFD) thermal models can achieve high resolution, Lumped Parameter Thermal Network (LPTN) models are often preferred thanks to their lower computational effort along with good accuracy [8,9,10]. However, the accuracy of any thermal model for electrical machines relies upon a fine tuning of its parameters, due to uncertainties in materials properties, manufacturing tolerances, assembly process, interaction with other drive system components [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analytical Thermal Model for Fast Stator Winding Temperature Prediction

Sciascera

Giangrande

Papini

et al. 2017

IEEE Trans. Ind. Electron.

157

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“…Under the preliminary hypothesis of constant current I, the system is time-invariant, and the general solution of (5) at the generic time t is given by (8), where 0 is the initial time.…”

Section: Lptn Analytical Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical Thermal Model for Fast Stator Winding Temperature Prediction

Sciascera

Giangrande

Papini

et al. 2017

IEEE Trans. Ind. Electron.

157

View full text Add to dashboard Cite

show abstract

“…This case can be used for the study of pipes, or, in our particular case, for the future studies of the stator or rotor of an electric machine [1][2][3][4], as it can be seen in Figure 1. The most common heat sources in an electrical machine are the electromagnetic phenomena in the cores (approximated here as metal tubes), heated by the Joule effect in the conductors [5][6][7] and the mechanical friction in the moving parts [8,9].…”

Section: Introductionmentioning

confidence: 99%

New Thermal-Conductivity Constitutive Matrix in Fourier’s Law for Heat Transfer Using the Cell Method

2019

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Featured Application: The amount of heat transferred by conduction is given by Fourier's law.For the study of these phenomena, the application of computational techniques that allow the design of machines and devices used in engineering becomes crucial. Abstract: In this paper, a new constitutive matrix [M τ ] for thermal conduction, for tetrahedral meshes, in a steady state thermal regime is developed through a new algebraic methodology, using the Cell Method as a computational method, which is included in the finite formulation. The constitutive matrix defines the behavior of solids when they are under a thermal potential. The results are compared with those obtained for the same problem by means of the constitutive matrix [M λ ] developed previously, taking in both cases with a 2D axisymmetric model as reference, calculated with the finite element method. The errors obtained with the new matrix [M τ ] are of the order of 0.0025%, much lower than those obtained with the matrix [M λ ].

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“…Lumped parameter thermal models are a commonly used approach to analyse and predict electrical machine thermal behaviour [1][2][3][4][5][6][7][8], particularly when considering a transient duty [9], [10]. This is predominantly because of the fast computation time of lumped parameter circuits, which is necessary when evaluating performance over extended duty cycles.…”

Section: Introductionmentioning

confidence: 99%