Patent · US Active

Electric machine and method for cooling an electric machine

US9680353B2 · kind B2 · utility

0Cited by

10References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Thomas Hümer · Koblenzer Straße, DE
Ekkehard Ressel · Heilsbronn, DE

Key dates

Filing date	Oct 9, 2013
Grant date	Jun 13, 2017
Priority date	—
Expiry date	Jun 1, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH02K9/18
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric machine includes an inner fan in an inner cooling circuit and an outer fan for producing an outer coolant flow that is separate from the inner cooling circuit. The inner and outer fans are connected to a common shaft of the electric machine and have opposite delivery directions along an axial direction of the electric machine. The outer fan is arranged in a fan housing which has an inlet opening for the inward flow of a coolant of the outer coolant flow, and includes an air directing device, which guides the coolant in a line section which extends in the radial direction of the electric machine from the inlet opening towards the outer fan.

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