The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2016
Filed:
Dec. 13, 2011
Konrad Brandl, Thalmassing, DE;
Vladimir Danov, Erlangen, DE;
Klaus Dennerlein, Erlangen, DE;
Bernd Gromoll, Baiersdorf, DE;
Jürgen Hofmann, Spalt, DE;
Patryk Piotrowski, Nürnberg, DE;
Andreas Schröter, Erlangen, DE;
Konrad Brandl, Thalmassing, DE;
Vladimir Danov, Erlangen, DE;
Klaus Dennerlein, Erlangen, DE;
Bernd Gromoll, Baiersdorf, DE;
Jürgen Hofmann, Spalt, DE;
Patryk Piotrowski, Nürnberg, DE;
Andreas Schröter, Erlangen, DE;
SIEMENS AKTIENGESELLSCHAFT, München, DE;
Abstract
An electric machine has a base body with a stator, a rotor shaft mounted in the base body, and a heat exchanger. Cooling ducts for a liquid cooling medium are arranged in the base body. The rotor shaft is embodied as a hollow shaft through which the liquid cooling medium can flow. The heat exchanger dissipates heat contained in the liquid cooling medium to the surroundings of the electric machine. The heat exchanger, the rotor shaft and the cooling ducts are fluidically connected in series, producing a closed circuit for the liquid medium. A feed element is arranged to co-rotate with the rotor shaft. The feed element is inserted in the closed circuit for the liquid cooling medium to forcibly circulate the liquid cooling medium in the closed circuit as the rotor shaft for the liquid cooling medium rotates.