The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2014
Filed:
Dec. 15, 2010
Petri Mäki-ontto, Espoo, FI;
Yrjö Tyllinen, Tervakoski, FI;
Pekka Kanninen, Espoo, FI;
ABB Technology AG, Zürich, CH;
Abstract
In an arrangement for cooling an electrical machine, the electrical machine includes a rotor and a stator located at the end of an air gap from the rotor. The rotor includes at least one axial cooling channel originating from the first end of the rotor that is connected to at least two axially successive cooling channels that are substantially radial within the rotor. The stator is made of sheets using axially successive core modules. The stator includes a radial cooling channel between two core modules. Gaseous cooling agent is led to the cooling channels of the rotor and stator from the end of the rotor. The outer surface of the stator core module includes a cooling jacket by the length (L) of the stator core module at maximum, and liquid cooling agent is led to the cooling jacket.