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:
Apr. 29, 1997
Filed:
Jun. 15, 1994
Applicant:
Inventors:
Olli Lindgren, Helsinki, FI;
Antero Arkkio, Espoo, FI;
Assignee:
High Speed Tech Oy Ltd., Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ; H02K / ;
U.S. Cl.
CPC ...
310211 ; 310261 ;
Abstract
A rotor in an asynchronous electrical machine used in high speed applications, comprises an electrically conductive conductor surrounding a rotor shaft and located substantially adjacent to a stator of the asynchronous electrical machine, a coating layer made of a ferromagnetic particulate material having an electric conductivity substantially lower than that of the conductor, the coating layer being placed between the rotor shaft and the conductor and a metallic intermediate layer between the coating layer and rotor shaft, the metallic intermediate layer having yield point lower than that of the coating layer and the rotor shaft.