Reducing the complexity of thermal models for electric machines via sensitivity analyses

Assaad, Bassel; Benkara, Khadija El Kadri; Friedrich, Guy; Vivier, Stéphane; Michon, A.

doi:10.1109/ecce.2017.8096795

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…Hence, Equation (8) gives the solution to steady-state temperature distribution, and Equation (10) supplies the solution to transient temperature rise. The above solutions can be realized by programming based on commercial software, such as Matlab.…”

Section: Pmsm Parameters and Lptn Model Buildingmentioning

confidence: 99%

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Thermal Analysis of Water-Cooling Permanent Magnet Synchronous Machine for Port Traction Electric Vehicle

Tang

Sun

et al. 2023

Electronics

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To further increase the torque/power density of a permanent magnet synchronous machine (PMSM) employed for a port traction electric vehicle, improving the thermal dissipation capacity of the cooling system used in the PMSM has become more and more important. This paper focuses on the thermal analysis of a water-cooling 200 kW PMSM for a port traction electric vehicle. First, the size parameters of the machine and the thermal property parameters of the materials used for each component are given. Based on the heat transfer theory, a fast evaluation method for a transient temperature rise in the water-cooling machine under multiple operating conditions is proposed. A lumped parameter thermal network (LPTN) model is established, and the temperature distributions of the machine at different operating conditions are analyzed. Second, under the same conditions, based on computational fluid dynamics (CFD), a three-dimensional (3D) CFD model is constructed. The influence of different cooling structures on temperature distribution is studied. The validity of the proposed fast evaluation method for a transient temperature rise in water-cooling machines under multiple operating conditions is verified. Finally, the results of the CFD and LPTN calculation are verified by experiments; the maximum temperature deviation of the rated speed/rated power operating condition is 8.5%. This paper provides a reference for the design and analysis of port traction electric vehicle machines.

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Section: Pmsm Parameters and Lptn Model Buildingmentioning

confidence: 99%

“…A systematic procedure to study the impact of each thermal phenomenon in interior PM machines was presented in [9]. In [10], a reduced model in a multi-physical electric machine optimization procedure was proposed.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Water-Cooling Permanent Magnet Synchronous Machine for Port Traction Electric Vehicle

Tang

Sun

et al. 2023

Electronics

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“…Due to this need, the model cannot be used for completely new electric machine cooling designs. Fields of application are a simulation of entire drive units or sensitivity studies like shown in [56].…”

Section: Thermal Modelsmentioning

confidence: 99%

Complete and accurate modular numerical computation scheme for multi‐coupled electric drive systems

Nell

Leuning

Mönninghoff

et al. 2020

IET Science, Measurement & Technology

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“…To allow for fast evaluation of thermal characteristics, usually the modeling is focused on most important temperatures and heat flow paths. Research is done to minimize the thermal models' complexity while guaranteeing acceptable accuracy [17] or to automatize the (dynamic) model creation to some extent [18], [19]. In terms of thermal modeling, different approaches were introduced in the past.…”

Section: Introductionmentioning

confidence: 99%

Measurement-Based Identification of Lumped Parameter Thermal Networks for sub-Kw Outer Rotor PM Machines

Wöckinger

Bramerdorfer

Drexler

et al. 2023

IEEE Trans. on Ind. Applicat.

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This work is on deriving precise lumped parameter thermal networks for modeling the transient thermal characteristics of electric machines under variable load conditions. The goal is to facilitate an accurate estimation of the temperatures of critical machines' components and to allow for running the derived model in real time to adapt the motor control based on the load history and maximum permissible temperatures. Consequently, the machine's capabilities can be exhausted at best considering a highly-utilized drive. The model shall be as simple as possible without sacrificing the exactness of the predicted temperatures. Accordingly, a specific lumped parameter thermal network topology was selected and its characteristics are explained in detail. The measurement data based optimization of its critical parameters through an evolutionary optimization strategy, and the therefore utilized experimental setup will be described in detail here. Measurement cycles were recorded for modeling and verification purposes including both static and dynamic test cycles with changing load torque and speed requirements. Applying the proposed hybrid approach for determining the model's parameters through involving physics-based equations as well as numerical optimization followed a significant improvement of the preciseness of the predicted motor temperatures compared to solely determining the networks's coefficients based on expert knowledge. Thereby, the validation included both the original measurement data as well as extra measurement runs. The proposed and applied strategy provides an excellent basis for future thermal modeling of electric machines.

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Reducing the complexity of thermal models for electric machines via sensitivity analyses

Cited by 9 publications

References 18 publications

Thermal Analysis of Water-Cooling Permanent Magnet Synchronous Machine for Port Traction Electric Vehicle

Thermal Analysis of Water-Cooling Permanent Magnet Synchronous Machine for Port Traction Electric Vehicle

Complete and accurate modular numerical computation scheme for multi‐coupled electric drive systems

Measurement-Based Identification of Lumped Parameter Thermal Networks for sub-Kw Outer Rotor PM Machines

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