Quality Assessment of a 2D FE Based Lumped Parameter Electric Motor Thermal Model Using 3D FE Models

Beyne, Wim; T’Jollyn, Ilya; Sergeant, Peter; Paepe, Michel De

doi:10.1109/icem49940.2020.9270820

Cited by 9 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of the zonal model (ZM) are verified against this reference simulation. Firstly, the discretization strategy for the zonal model as elaborated by Nonneman et al [11] is used for a steadystate threshold accuracy of 0.5 °C on the key component average temperatures (winding, stator core, rotor core and magnets) and maximum winding temperature. This results in 6 radial and 3 tangential zones in the winding, and 8 axial zones in the stack and 5 in the end winding.…”

Section: Verification Of the Modelling Methodologymentioning

confidence: 99%

Enhancing thermal modelling of electric machines: steady-state verification of a novel methodology

Nonneman,

T’Jollyn,

De Paepe

2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The increasing power density of electric machines for electric vehicles necessitates accurate thermal analysis in design through simulations with computation times not exceeding one minute. Existing thermal models are either accurate and complex while requiring large computation times or they are fast but lack accuracy. To address these challenges, a novel hybrid modelling methodology is proposed, combining 3D lumped parameter thermal networks with thermal resistances extracted from 2D finite element models (FEM) to reduce computation demands while preserving accuracy. Verification of the modelling methodology against 3D FEM in OpenFOAM shows key component temperature deviations of less than 0.67 °C comparable to the 3D FEM uncertainty of 0.39 °C. The computation time is 18.3 s compared to 44 h for 3D FEM. This highlights the time-efficiency of the proposed methodology while maintaining accuracy for key component temperatures.

show abstract

Section: Verification Of the Modelling Methodologymentioning

confidence: 99%

Enhancing thermal modelling of electric machines: steady-state verification of a novel methodology

Nonneman,

T’Jollyn,

De Paepe

2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…To evaluate the rotor cooling methods described in the previous section, an existing 3D LPM [7] is extended with the proposed methods. For hollow shaft liquid cooling, specialized heat transfer correlations are proposed by Seghir-Ouali et al [12].…”

Section: Thermal Lumped Parameter Modelmentioning

confidence: 99%

“…As the motor performance is highly dependent on the temperature distribution in the electrical machine, accurate thermal models are needed to design and improve these machines. In this work, the electrical machine will be modeled using an advanced lumped parameter model (LPM) [7]. A flowchart of the model is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of High Performance Rotor Cooling Techniques for Permanent Magnet Electric Motors

Beyne

Sijpe

T’Jollyn

et al. 2021

2021 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

Self Cite

View full text Add to dashboard Cite

A thermal analysis of an interior permanent magnet machine using a lumped parameter model is presented, with the objective to evaluate several rotor cooling techniques for electric vehicle applications which are needed in order to achieve higher power densities. Two of the selected rotor cooling techniques involve cooling of the shaft by pumping a liquid through a channel in the shaft and by implementing a rotating heat pipe. The third selected rotor cooling technique is accomplished by pointing liquid jets towards the hub of the rotor. The lumped parameter model and implementation of these newly modeled cooling techniques are described. From the temperature distributions of the electrical machine resulting from water jacket cooling in combination with the different rotor cooling techniques, it was revealed that when the rotor of an electrical motor contains a hub, shaft cooling methods are ineffective. Rotor jet cooling however resulted in the most effective cooling approach to minimize permanent magnet temperatures.

show abstract

“…Lumped parameter thermal networks (LPTN) are very attractive for quick predictions, design optimization and parameter sensitivity analysis which make them most suitable to simulate the performance of the direct rotor cooling method and optimize the design [7]. Therefore a previously developed zonal thermal model of an interior permanent magnet machine is extended to include the novel direct rotor cooling method [8]. To validate the implementation of the direct rotor cooling method, the rotor of the machine is experimentally investigated in this study with a rotor heater setup and the measurements are compared to the simulations of each setpoint.…”

Section: Introductionmentioning

confidence: 99%

Thermal Modelling and Validation of a Direct Rotor Cooled Permanent Magnet Electric Machine

Nonneman,

T’Jollyn,

Vanhee

et al. 2023

2023 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

Self Cite

View full text Add to dashboard Cite

A novel direct rotor cooling method for electric machines is proposed and the performance is evaluated based on a thermal zonal model that is validated with measurements on a rotor heater setup. The trend of increasing power density of electric machines urges the need for high performance rotor cooling methods. A thermal model is needed to assess the performance of these methods on a certain geometry and to optimize the design. A previously developed thermal zonal model of an interior permanent magnet synchronous machine is extended with the novel direct rotor cooling method and validated with measurements on a rotor heater setup for different oil inlet temperatures (40 to 80°C), flow rates (0.5 to 10 l/min) and heating powers (261 to 873W). With a maximum absolute and relative deviation between the measurements and simulations of respectively 6.3°C and 13.3% on the maximum rotor core temperatures for flow rates higher than 1 l/min, it is concluded that the model is sufficiently accurate when taking into account the assumptions and uncertainties on the input parameters. A model based comparison with the validated model shows the great potential of the novel direct rotor cooling method to push the power density to higher levels, since the relative magnet temperatures can be decreased by 71% compared to a hollow shaft liquid cooled machine.

show abstract

Quality Assessment of a 2D FE Based Lumped Parameter Electric Motor Thermal Model Using 3D FE Models

Cited by 9 publications

References 14 publications

Enhancing thermal modelling of electric machines: steady-state verification of a novel methodology

Enhancing thermal modelling of electric machines: steady-state verification of a novel methodology

Evaluation of High Performance Rotor Cooling Techniques for Permanent Magnet Electric Motors

Thermal Modelling and Validation of a Direct Rotor Cooled Permanent Magnet Electric Machine

Contact Info

Product

Resources

About