CFD Study of Forced Air Cooling and  Windage Losses in a High Speed  Electric Motor

Anderson, Kevin R.; Lin, Jun; McNamara, Christopher; Magri, Valerio

doi:10.4236/jectc.2015.52003

Cited by 29 publications

(42 citation statements)

References 24 publications

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“…Determining the temperature and velocity profiles of the fluid requires solving the Navier-Stokes and energy equations which do not have analytical solutions for most complex geometries. Therefore, either numerical methods are used, such as CFD modeling [76], to solve for the convective heat transfer or experiments may be carried out [77]. From these numerical simulations or experimental measurements, correlations are derived representing certain geometries and flow conditions.…”

Section: B Example Case -Steady-state Airgap Thermal Modelingmentioning

confidence: 99%

Modeling and Analysis of Electric Motors: State-of-the-Art Review

Bilgin

Liang

Terzić

et al. 2019

IEEE Trans. Transp. Electrific.

101

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This paper presents a comprehensive state-ofthe-art review of the modeling and analysis methods for the multidisciplinary design of electric motors for various applications including vehicular power and propulsion systems and electrified powertrains. It covers the important aspects of different engineering domains such as dynamic modeling, loss calculations, demagnetization analysis, thermal modeling, acoustic noise and vibration analysis, and mechanical stress modeling. The paper intends to guide the electric motor designers through examples and results on how to apply different analysis techniques on electric motors.

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Section: B Example Case -Steady-state Airgap Thermal Modelingmentioning

confidence: 99%

Modeling and Analysis of Electric Motors: State-of-the-Art Review

Bilgin

Liang

Terzić

et al. 2019

IEEE Trans. Transp. Electrific.

101

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“…Besides, the working temperature of the electronic components may exceed the desired temperature level. For the case of high speed motor, heat transfer analysis and windage losses were determined by using CFD while satisfying at junction temperature [1]. The variation of inlet velocity at inlet to select appropriate fan selection to cool the heatsink was investigated [2].…”

Section: Introductionmentioning

confidence: 99%

Thermal Management of an Electronic Board using CFD

Koushik¹

2019

IJRASET

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The rising demand for high performance and multiple functionality in electronic systems and devices continue to be the current great challenges in their thermal management. Thus, the effective removal of heat dissipations and maintaining a safe operating temperature has played an important role in insuring a reliable operation of electronic components. In this paper, a computational domain with thermal components like basechip and transistor placed in its location was considered. A fan was placed near ventilation such that the ambient air was forcely dragged into the enclosure carries the heat from the thermal components. CFD analysis has been conducted to examine the effect of variation in the cooling rate/ heat dissipation inside the components when the fan rotates at 1000 rpm. Investigations were conducted to understand the fluid flow behavior and heat transfer characteristics inside the cabinets. Results were measured at pseudo-steady state i.e., at the end of 1.8 sec, when the heat flux of 2500 w/m 2 input given to the thermal components. The area-weighted average static temperature was found to be around 800 K and 697 K respectively

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“…From [9], the heat transfer coefficients at the winding surface and air gap were increased up to 31% and 90%, and total winding cooling performance was improved, on average by 55%. The work of [10] provides fundamental insight into the heat transfer behavior in the Poiseuille-Taylor-Couette flow field set-up between the rotor and the small gap of high-speed electric motors. Based upon the literature review above, it can be seen that the research and development of high-speed motor cooling is active and broad.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Windage Losses in the Narrow Gap Region of a High-Speed Electric Motor

Anderson

Lin

Wong

2018

Fluids

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Windage (drag) losses have been found to be a key design factor for high power density and high-speed electric motor development. Inducing axial flow between rotor and stator is a common method in cooling the rotor. Hence, it is necessary to understand the effect on windage while forced axial airflow is in present in the air gap. The current paper presents results from experimental testing and modeling of a high-speed motor designed to operate at 30,000 revolutions per minute (RPM) and utilize axial air cooling of 200 Liters per minute (LPM) to cool the motor. Details of the experimental apparatus and computational fluid dynamics (CFD) modeling of the small gap narrow region of the stator/rotor are outlined in the paper. The experimental results are used to calibrate the CFD model. Results for windage losses, flow rate of cooling air, power and torque of the motor versus mass flow rate are given in the paper. Trade studies of CFD on the effect of inlet cooling flow rate, and parasitic heat transfer losses on the Taylor-Couette flow coherent flow structure breakdown are presented. Windage losses on the order of 20 W are found to be present in the configuration tested and simulated.

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CFD Study of Forced Air Cooling and Windage Losses in a High Speed Electric Motor

Cited by 29 publications

References 24 publications

Modeling and Analysis of Electric Motors: State-of-the-Art Review

Modeling and Analysis of Electric Motors: State-of-the-Art Review

Thermal Management of an Electronic Board using CFD

Experimental and Numerical Study of Windage Losses in the Narrow Gap Region of a High-Speed Electric Motor

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