Computationally Efficient 3-D Finite-Element-Based Dynamic Thermal Models of Electric Machines

Zhou, Kan; Pries, Jason; Hofmann, Heath

doi:10.1109/tte.2015.2456429

Cited by 27 publications

(8 citation statements)

References 28 publications

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“…Secondly, the machine is sized (2). The optimum 2D plane and cooling type must be selected for the application.…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned before, PMSM is the most used electric machines for traction, and one of their main characteristics is the nonlinearity, as well as their temperature dependences in the generated magnetic flux. They can also get demagnetized if they continuously suffer thermal overload [1][2][3]. This is why electromagnetic simulations must be linked to thermal ones, making them more accurate as a whole.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the accuracy is dependent on the same factors for the thermal network; just making a difference when the solid component conduction must be calculated precisely. Some authors used a 3D reduced-order FEA model to reduce computational time maintaining a rather good accuracy [2,11].…”

Section: Introductionmentioning

confidence: 99%

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Multi-Physics Tool for Electrical Machine Sizing

et al. 2020

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Society is turning to electrification to reduce air pollution, increasing electric machine demand. For industrial mass production, a detailed design of one machine is usually done first, then a design of similar machines, but different ratings are reached by geometry scaling. This design process may be highly time-consuming, so, in this paper, a new sizing method is proposed to reduce this time, maintaining accuracy. It is based on magnetic flux and thermal maps, both linked with an algorithm so that the sizing process of an electrical machine can be carried out in less than one minute. The magnetic flux maps are obtained by Finite Element Analysis (FEA) and the thermal maps are obtained by analytical models based on Lumped Parameter Circuits (LPC), applying a time-efficient procedure. The proposed methodology is validated in a real case study, sizing 10 different industrial machines. Then, the accuracy of the sizing tool is validated performing the experimental test over the 10 machines. A very good agreement is achieved between the experimental results and the performances calculated by the sizing tools, as the maximum error is around 5%.

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“…Secondly, the machine is sized (2). The optimum 2D plane and cooling type must be selected for the application.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-Physics Tool for Electrical Machine Sizing

et al. 2020

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show abstract

“…Therefore, an accurate and reliable thermal prediction method is very important in the motor design stage. There are two common thermal analysis methods for electrical machines, including the analytical lumped-parameter-network method (LPTN) [6][7][8][9][10][11][12][13] and the numerical methods, like computational fluid dynamics (CFD) and the finite element method (FEM) [14][15][16][17][18][19]. The numerical methods are commonly used in thermal analysis with high accuracy.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic and Thermal Analysis of a Permanent Magnet Motor Considering the Effect of Articulated Robot Link

Luu

Lee

et al. 2020

Energies

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This paper presents the electromagnetic and thermal characteristics of a permanent magnet synchronous motor (PMSM) in a joint actuator which is used for articulated robot application. In an attempt to design a compact PMSM for the articulated robot, robot link should be taken into consideration during the motor design process as it can reduce the temperature distribution on motor, thus reducing the volume of the motor. A lumped-parameter thermal model of PMSM with and without a link is proposed considering the core loss, copper loss, and mechanical loss as heat sources. The electromagnetic and thermal analysis results are well confirmed by the experiment in a 400 W 20-pole/24-slot PMSM. The experiment results show that the robot link helps to reduce the motor end-winding temperature by about 40%, and this leads to an increase in power density of the motor.

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“…However, the disadvantage of this method is that it cannot be used to conduct three-dimensional modeling or to accurately analyze the electric fields in the corner and along narrow edges [11,12]. In recent years, with the rapid development of computer technology, simulation tools for the finite element method have been applied to determine the electric field distribution and optimize the calculations pertaining to the generator bar [13]. In 2003, researchers at the Federal University of Parana, Brazil, conducted numerical simulations of the bar and adopted a special location modeling approach for the interphase electric field.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Electric Field Distribution at the End of the Stator in a Large Generator

Zhang

et al. 2018

Energies

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The electric field distribution at the end of a large hydro-generator is highly nonuniform and prone to corona discharge, which damages the main insulation and significantly reduces the service life of the hydro-generator. In order to reduce the thickness of the main insulation and the physical size of a large hydro-generator, it is necessary to understand the distribution of the electric field at the end of its stator bar. In this paper, the stator bar at the end of a large generator is simulated using the finite element method to determine the distribution of the potential, electric field, and loss at the rated voltage, as well as to elucidate the differences between the linear corona protection, two-segment nonlinear corona protection, and three-segment nonlinear corona protection structures. The influences of the arc angle, length of each corona protection layer, intrinsic resistivity of the corona protection material, and nonlinear coefficient are also analyzed. The results manifest that the angle of the stator bar should be 22.5 • , the difference in resistivity between the two adjacent corona protection coatings should not exceed two orders of magnitude, and the resistivity of the medium resistivity layer should be nearly 10 6 Ω·m or 10 7 Ω·m, for an optimal design of the corona protection structure.

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Computationally Efficient 3-D Finite-Element-Based Dynamic Thermal Models of Electric Machines

Cited by 27 publications

References 28 publications

Multi-Physics Tool for Electrical Machine Sizing

Multi-Physics Tool for Electrical Machine Sizing

Electromagnetic and Thermal Analysis of a Permanent Magnet Motor Considering the Effect of Articulated Robot Link

Optimization of the Electric Field Distribution at the End of the Stator in a Large Generator

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