ELECTRIC MACHINE
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United States of America Patent
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Issued Date -
Dec 1, 2016
app pub date -
Jan 21, 2015
filing date -
Feb 5, 2014
priority date (Note) -
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Abstract
An electric machine is described, having a stator and a rotor, the rotor comprising a rotor shaft which is configured as a hollow shaft, a closed cavity being formed in the hollow shaft, in which closed cavity a vacuum prevails, and in which closed cavity a heat-transporting medium is received, and the hollow shaft having an evaporating region (hot zone) and a condensing region (cold zone), and a steam channel being provided in the cavity, and the surface of the cavity having structures which bring about transport of the condensate of the heat-transporting medium as a result of the rotation.
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