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:
Mar. 07, 2017
Filed:
Mar. 29, 2012
Finn Jensen, Ulstrup, DK;
Henrik Ørskov Pedersen, Silkeborg, DK;
Finn Jensen, Ulstrup, DK;
Henrik Ørskov Pedersen, Silkeborg, DK;
GRUNDFOS MANAGEMENT A/S, Bjerringbro, DK;
Abstract
A rotor () for an electric motor, which rotor () includes a plurality of laminated rotor sheets () arranged in layers and each provided with slots (); a number of permanent magnets () arranged within magnet slots () in the laminated rotor sheets (), where an end area () of each magnet slot () is a magnet free area. The rotor () also includes a plurality of rotor bars () arranged in rotor bar slots () and a rotor sheet band () provided between the end area () and the adjacent rotor bar slot (). At least one notch () extending from the edge () of the rotor bar slot () and/or from the edge (') of the end area () divides the rotor sheet band () into a first area () and a second area (). The smallest width (D) of the first area () is smaller than the smallest width (D) of the second area ().