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:
Jan. 30, 2024
Filed:
Dec. 28, 2020
Abb Schweiz Ag, Baden, CH;
Mikael Heikel, Helsinki, FI;
Mark Szucs-Bartfai, Helsinki, FI;
Aron Szucs, Helsinki, FI;
Blanka Szucs-Bartfai, Helsinki, FI;
Zsolt Kovacs, Helsinki, FI;
Jan Westerlund, Helsinki, FI;
ABB Schweiz AG, Baden, CH;
Abstract
The disclosure relates to an electric induction machine in which a chamfer region is provided between each respective rotor groove and rotor bar at a position corresponding to a radially outer internal corner region of the rotor groove. Suitably, the chamfer region has a relative magnetic permeability less than that of the rotor frame, and an electrical resistivity higher than that of the rotor bar. Moreover, a minimum diameter of the chamfer region is suitably larger than a manufacturing-tolerances derived maximum clearance between the respective rotor groove and robot bar, if any.