Coupled Electromagnetic–Thermal Analysis of Electric Machines Including Transient Operation Based on Finite-Element Techniques

Jiang, Wenying; Jahns, T.M.

doi:10.1109/tia.2014.2345955

Cited by 99 publications

(49 citation statements)

References 15 publications

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“…The angular coefficient (representing the ratio of the radiant energy emitted by surface 1 absorbed by surface 1 to the total radiant energy emitted by surface 2) σ b is the blackbody radiation constant, and its value is 5.67 × 10 −8 . T 1 , T 2 are the temperatures of radiating surfaces 1 and 2 [19]. When determining the thermal parameters of HMB, it is assumed that the thermal conductivity of each component material does not vary with temperature.…”

Section: Boundary Conditions and Thermal Parametersmentioning

confidence: 99%

Temperature Field Analysis and Optimization of the Homopolar Magnetic Bearing

Cao¹,

Liu²,

Zhu³

et al. 2019

PIER M

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The hybrid magnetic bearings (HMB) stabilize suspension in equilibrium position by providing bias flux through permanent magnets. The loss generated during operation causes the temperature of HMB to rise, which affects the stability of the magnetic bearing. In this paper, the loss and temperature of HMB are analyzed by finite element analysis software. The results show that the loss of HMB is mainly distributed in the rotor part, and the temperature of the rotor part is obviously higher than that of the stator part. The relationship between the structural parameters such as air gap length and pole width, and the loss of HMB is obtained by finite element analysis. According to the analysis results, the structural parameters are optimized by GAPSO. After optimization, the loss and temperature of HMB are significantly reduced.

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Section: Boundary Conditions and Thermal Parametersmentioning

confidence: 99%

Temperature Field Analysis and Optimization of the Homopolar Magnetic Bearing

Cao¹,

Liu²,

Zhu³

et al. 2019

PIER M

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show abstract

“…In the typical case, six or more iterations, each comprising electromagnetic and thermal analysis, have been reported in order to reach convergence [4]. Also, it should be noted that the computational efforts for the two problems are largely different.…”

Section: Iterative Multi-physics Couplingmentioning

confidence: 99%

“…Different methods, ranging from closed form equations, to equivalent networks, and numerical field analysis, such as finite element analysis (FEA) and computational fluid dynamics (CFD) are available for such purpose, e.g. [1][2][3][4]. The use of automated computer optimization, which requires the evaluation of thousands of candidate designs, calls for the combination of fastest computational tools that ensure satisfactory accuracy, e.g.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Steady-State Multiphysics Model for PM and Synchronous Reluctance Machines

Wáng

Ionel²,

Staton

2015

IEEE Trans. on Ind. Applicat.

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A new technique for coupling the electromagnetic, thermal, and air-flow analysis is proposed especially for electric machines that exhibit a reduced dependency of core losses with temperature and load, and have low rotor losses. Within the overall iterative loop, another inner loop that cycles only the thermal calculations and employs a simplified model for estimating losses is introduced. The thermal and air-flow analysis models the conduction, radiation, and convection heat transfer and is based on equivalent circuit networks. A computationally efficient FE technique is employed for the electromagnetic field analysis. The combination of algorithms results in ultra-fast processing as the number of outer loop iterations, which include electromagnetic FEA, is minimized. The overall computational time is significantly reduced in comparison with the conventional method, such that the new technique is highly suitable for large scale optimization studies. Example simulation studies and measurements from an integral hp IPM motor are included to support validation.

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“…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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Coupled Electromagnetic–Thermal Analysis of Electric Machines Including Transient Operation Based on Finite-Element Techniques

Cited by 99 publications

References 15 publications

Temperature Field Analysis and Optimization of the Homopolar Magnetic Bearing

Temperature Field Analysis and Optimization of the Homopolar Magnetic Bearing

Ultrafast Steady-State Multiphysics Model for PM and Synchronous Reluctance Machines

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

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