Splits of windage losses in integrated transient rotor and stator thermal analysis of a high-speed alternator during multiple discharges

Liu, H.-P.; Hearn, C.S.; Werst, M.D.; Hahne, J.J.; Bogard, David G.

doi:10.1109/tmag.2004.839294

Cited by 12 publications

(1 citation statement)

References 4 publications

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“…To manage the heat generation in these machines, care must be taken of heat generated by a variety of sources, including friction windage in the gaps between the rotating and stationary elements. Detailed thermal analyses by Liu et al [11], [12] compare predictions with experiments. In some cases, active cooling may be essential in these high performance alternators.…”

Section: Energy Storage and Power Conditioningmentioning

confidence: 99%

Electromagnetic launch science and technology in the United States enters a new era

Fair

2005

IEEE Trans. Magn.

107

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Electromagnetic launch science and technology in the United States is on the threshold of a major new advance in its development. Significant developments in hypervelocity electromagnetic launch and in hypervelocity high-G guidance and control components have provided the impetus for exploring advanced electromagnetic weapon systems capable of providing revolutionary new capabilities. These systems include the electromagnetic launch of aircraft from Navy aircraft carriers, hypervelocity electromagnetic guns on ships to provide protection and to launch guided projectiles to extraordinary ranges, and lightweight ground combat vehicles propelled by hybrid electric power protected by electromagnetic armor and capable of defeating advanced armor targets with lightweight hypervelocity penetrators from electromagnetic railguns. This presentation will summarize many of the technical advances leading to the decision to implement these new engineering efforts.

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Section: Energy Storage and Power Conditioningmentioning

confidence: 99%

Electromagnetic launch science and technology in the United States enters a new era

Fair

2005

IEEE Trans. Magn.

107

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Fan characteristics of the self-support components of rotor ends and its performance matching

Ding

Liu

Zhang

2017

International Journal of Heat and Mass Transfer

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Investigation of mechanical loss and heat transfer in an axial-flux PM machine

Wróbel

Vainel²,

Copeland

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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This paper investigates components of the mechanical loss together with heat transfer effects in an axialflux PM motor. The mechanical loss components generated within electrical machines are well known, however, their prediction or derivation has not been widely reported in the literature. These, together with the electromagnetic loss sources and heat transfer effects are crucial and must be accounted for when considering high-power density, high-speed and/or compact machine design. This research is focused on separating the mechanical loss components to gain a more in depth understanding of the effects and their importance. Both experimental and theoretical techniques have been employed in the analysis. In particular, hardware tests with dummy rotors have been performed to measure the bearing and windage/drag loss components. These have been supplemented with CFD analysis to theoretically evaluate the aerodynamic effects occurring within the mechanical air-gap accounting for loss and heat transfer. Further to these, a 3D lumped parameter thermal model of the axial-flux PM demonstrator has been developed to validate predictions of the mechanical loss components and heat transfer mechanisms. The theoretical findings show good agreement with experimental data. Moreover, the research outcomes suggest that the mechanical and aerodynamic effects require careful consideration when a less conventional machine design is considered. I.

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Splits of windage losses in integrated transient rotor and stator thermal analysis of a high-speed alternator during multiple discharges

Cited by 12 publications

References 4 publications

Electromagnetic launch science and technology in the United States enters a new era

Electromagnetic launch science and technology in the United States enters a new era

Fan characteristics of the self-support components of rotor ends and its performance matching

Investigation of mechanical loss and heat transfer in an axial-flux PM machine

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