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. 01, 2025
Filed:
Dec. 22, 2021
Abb Schweiz Ag, Baden, CH;
Ghanshyam Shrestha, Raleigh, NC (US);
Wei Xing, Raleigh, NC (US);
Graham Medlin, Raleigh, NC (US);
Rajib Mikail, Raleigh, NC (US);
ABB SCHWEIZ AG, Baden, CH;
Abstract
The present disclosure relates to electrical machines, such as liquid-cooled motors. The liquid-cooled motors can include a stator with cooling tube channels (e.g., corrugated channels) having tubes inserted and expanded. Lamination holes for each lamination in the lamination stack of the stator can have varying diameter along the axial direction to achieve a corrugated internal feature. The tubes for cooling liquid can be fitted in the lamination holes of the stator. In some embodiments, hydraulic expansion expands and plastically deforms the tubes to the contour of the corrugated internal feature of the corrugated channel. In some embodiments, the tube can also be inserted in the corrugated channel and a stator head plate, thereby helping create a compact stator by removing the need for tube connections to connect the corrugated channels.