US 12,614,934 B2Granted

Rotor for an electric machine, and method for producing a rotor

AssigneeVitesco Technologies Germany GmbH

InventorsLennart Leopold, Lucas Schmieder

Life of this patent

Estimating the term…

Loading patent…

Abstract

A rotor for an electric machine, having a plurality of annular laminated core segments, wherein each laminated core segment is made of a plurality of laminations are arranged one behind the other and are adhered together, each laminated core segment has a first end face and a second end face. Each laminated core segment is equipped with at least one magnet pocket, which extends in the longitudinal direction of the laminated core segment, for receiving a permanent magnet, the permanent magnet is introduced into the magnet pocket solely from the first end face. At least two laminated core segments of the rotor are arranged relative to each other such that the respective first end faces of the laminated core segments face one another and are adhered together, and the respective second end faces of the distal laminated core segments are oriented outwards in the longitudinal direction of the rotor.

Claims12

Dependent claims

A rotor for an electric machine, comprising:

a plurality of annular laminated core segments, each of the plurality of laminated core segments further comprising:
a plurality of laminations which are arranged one behind the other and substance-bonded together, and each of the plurality of laminations has a first end face and a second end face which is spaced apart from the first end face in the longitudinal direction of the laminated core segment;
at least one magnet pocket extending in the longitudinal direction of the laminated core segment for receiving a permanent magnet, wherein the magnet pocket is arranged and/or configured such that the permanent magnet is introduced into the magnet pocket solely from the first end face, and one of the plurality of laminations having the second end face is devoid of the at least one magnet pocket;
wherein the permanent magnet is arranged in the magnet pocket via the first end face and is adjacent to and in contact with the one of the plurality of laminations having the second end face;
wherein at least two of the plurality of laminated core segments of the rotor are arranged relative to one another such that the respective first end faces of the at least two of the plurality of laminated core segments face one another and are connected by substance bonding such that the permanent magnet of each of the at least two of the plurality of laminated core segments are adjacent one another, and two of the plurality of annular laminated core segments are distal to one another and have respective second end faces which are oriented outwards in the longitudinal direction of the rotor, and a third of the plurality of laminated core segments is adjacent one of the at least two of the plurality of laminated core segments such that the permanent magnet and the first end face of the third of the plurality of laminated core segments are adjacent to and in contact with the second end face of one of the at least two of the plurality of laminated core segments.

2 more elements

A method for producing a rotor, comprising the steps of:

providing a plurality of annular punched laminations for forming a plurality of laminated core segments;
providing at least one cutout in one or more of the plurality of annular punched laminations for forming at least one magnet pocket in each of the plurality of laminated core segments, the at least one magnet pocket for receiving a permanent magnet;
arranging the plurality of annular punched laminations one behind the other to form each of the plurality of laminated core segments, such that each of the plurality of laminated core segments has a first end face and a second end face, where the second end face is spaced apart from the first end face in the longitudinal direction of each laminated core segment, and one of the plurality of laminations having the second end face is devoid of the at least one magnet pocket;
substance-bonding the plurality of annular punched laminations to form each of the plurality of laminated core segments;
introducing the permanent magnet into the magnet pocket solely via the first end face and/or starting from the first end face;
and
inserting the permanent magnet into the magnet pocket such that the permanent magnet is adjacent to and in contact with the one of the plurality of laminations having the second end face;
arranging the plurality of laminated core segments such that the respective first end faces of at least two of the plurality of laminated core segments face one another and the permanent magnet of the at least two of the plurality of laminated core segments are adjacent one another, and a third of the plurality of laminated core segments is adjacent one of the at least two of the plurality of laminated core segments such that the permanent magnet and the first end face of the third of the plurality of laminated core segments are adjacent to and in contact with the second end face of one of the at least two of the plurality of laminated core segments.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/164,762Filed 6 Feb 2023 · continuation
Priority: DE 10 2020 209 932.46 Aug 2020
Published: US 2023/0187987 A115 Jun 2023
Granted: 28 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02K 1/276
The rotor consisting of magnets or groups of magnets arranged with alternating polarity: magnets embedded in the magnetic core, e.g. interior…
H02K 1/27
Rotating parts of the magnetic circuit: rotor cores with permanent magnets
H02K 15/03
Of stator or rotor bodies: having permanent magnets
H02K 2201/06
Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits: magnetic cores, or permanent magnets…