Patent · US Active

Electric machine with helical cooling channels

US11018539B2 · kind B2 · utility

0Cited by

4References

11Claims

0Family size

Assignee

VITESCO TECHNOLOGIES GMBH · DE

Inventors

Holger Fröhlich · Berlin, DE
David Charles · Walnut Creek, US
Sönke Gürtler · Berlin, DE

Key dates

Filing date	Nov 23, 2016
Grant date	May 25, 2021
Priority date	—
Expiry date	Mar 10, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH02K2201/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric machine for a drivetrain of a motor vehicle may comprise: a rotor with a rotor laminated core; a stator with winding heads on opposite end faces; and a housing with a a cooling liquid reservoir. The rotor core comprises multiple stacked laminations each with an aperture connecting the end faces to one another. The apertures of adjacent laminations are offset in a circumferential direction so: a first helical cooling channel connects an inner region of the core to a first end face; a second helical cooling channel connects the inner region of the core to a second end face; and the first cooling channel and the second cooling channel are oriented oppositely with respect to one another and are connected via a passage within the rotor laminated core to a feed line conducting the cooling liquid within the rotor shaft.

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