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:
May. 23, 2017
Filed:
Jan. 25, 2012
Asko Parviainen, Lappeenranta, FI;
Ari Piispanen, Lappeenranta, FI;
Asko Parviainen, Lappeenranta, FI;
Ari Piispanen, Lappeenranta, FI;
AXCO-Motors Oy, Lappeenranta, FI;
Abstract
The invention relates to a joint between a copper short-circuiting ring () and a copper bar () of the damper winding in a permanent magnet synchronous machine, wherein the end of the bar is jointed to a hole () disposed in the short-circuiting ring by welding them together at the mating surfaces. Further, the invention relates to a corresponding method. According to the invention the short-circuiting ring () includes a blocking structure for limiting the heat flux from being conducted further into the short-circuiting ring from the weld between the short-circuiting ring and the bar.