Patent · US Active

Electric machine having a fluid cooling device

US12081096B2 · kind B2 · utility

0Cited by

1References

4Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Michael Hacklberger · Neuburg am Inn, DE
Sebastian Kornexl · Wegscheid, DE
Manfred Geier · Puchheim, DE

Key dates

Filing date	Oct 31, 2019
Grant date	Sep 3, 2024
Priority date	—
Expiry date	Jan 15, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH02K2213/03
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric machine with a stator, a rotor, and a fluid cooling device. The rotor is supported by a rotor shaft and a first bearing arranged at a bearing shield. The fluid cooling device has a cooling tube secured to a carrier element in fluidic communication with a fluid input and output and extends inside a recess of the rotor shaft while forming an annular space. A sealing element is provided between the rotor shaft and the carrier element, which prevents fluid passage into a spatial region of the electric machine outside of the sealing region. A second bearing is axially spaced apart from the first bearing is between the rotor shaft and a second bearing shield for supporting the rotor. The rotor core extends in a space between the first bearing and second bearing, and the recess extends inside the rotor shaft axially to the second bearing.

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