Patent · US Active

Electric machine with enclosed, autonomous cooling medium circuit

US9431878B2 · kind B2 · utility

1Cited by

5References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Konrad Brandl · Thalmässing, DE
Vladimir Danov · Erlangen, DE
Klaus Dennerlein · Erlangen, DE
Bernd Gromoll · Baiersdorf, DE
Jurgen Hofmann · Spalt, DE
Patryk Piotrowski · Nürnberg, DE
Andreas Schröter · Nürnberg, DE

Key dates

Filing date	Dec 13, 2011
Grant date	Aug 30, 2016
Priority date	—
Expiry date	Dec 11, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02K1/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.