Patent · US Active

Electric machine with rotor interior ventilation

US9257883B2 · kind B2 · utility

12Cited by

7References

10Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Klaus Büttner · Hollstadt, DE
Klaus Kirchner · Nidderau, DE
Michael Müller · Hennef (Sieg), DE

Key dates

Filing date	Jun 27, 2012
Grant date	Feb 9, 2016
Priority date	—
Expiry date	Jun 27, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02K15/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric machine includes a stator, a rotor interacting magnetically with the stator, a housing surrounding the stator and rotor, and a hollow shaft provided for arrangement of the rotor and mounted on the housing. A radial fan is mounted rotationally fixed on the hollow shaft on the ventilation side. A section of a fan blade of the radial fan extends axially away from the housing to a greater extent than the hollow shaft. A guide element with radially extending plate is arranged in the hollow shaft, wherein the plate is arranged axially further away from the housing than the end side of the hollow shaft on the ventilation side. An inner coolant flow can thus be delivered from the section of the fan blade out of the hollow shaft through a passage between the end side of the hollow shaft on the ventilation side and the plate radially outwards.

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