Rotor, method for producing a rotor, asynchronous machine, and vehicle

• US 10,461,616 B2
• Filed: 06/06/2018
• Issued: 10/29/2019
• Est. Priority Date: 12/08/2015
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Lichtinger, Josef, Ulbrich, Holger, Siegling, Manfred
• Primary Examiner(s): Le, Dang D
• Application Number:
  US16/001,097
• Publication Number:
  US 20180287472A1
• Time in Patent Office: 510 Days
• CPC Class Codes: H02K 15/0012 Manufacturing cage rotors
• CPC Class Codes: H02K 17/165 characterised by the squirrel-cage or other short-circuited windings
• CPC Class Codes: H02K 17/20 having deep-bar rotors

Abstract

A rotor for an asynchronous machine has a laminated core and a short-circuit cage at least partially integrated in the laminated core. The short-circuit cage is designed with rods having or consisting of a first electrically conductive material and short-circuit rings having or consisting of a second electrically conductive material. At least one of the short-circuit rings is designed with a support ring, and each support ring is designed as a structure interlockingly and/or integrally cast onto or into the associated short-circuit ring.

Claims

1. A rotor for an asynchronous machine, comprising:

a laminated core; and

a short-circuit cage which is at least partially integrated into the laminated core, wherein

the short-circuit cage comprises

rods made with or from a first electrically conductive material,

short-circuit rings made with or from a second electrically conductive material,

wherein at least one of the short-circuit rings is constructed with a support ring,

wherein a respective support ring is constructed as a structure which is cast onto or into the respective short-circuit ring in at least one of a positively locking and materially joining fashion,

wherein the respective support ring is constructed with, on a surface, a contour for supporting the at least one of the positive locking and the material joining with the respective short-circuit ring, and

wherein the contour has a plurality of projections disposed on an inner surface of the contour inside of a peripheral edge of the contour and projecting radially toward a center of the contour.

2. The rotor as claimed in claim 1, wherein

the respective support ring is constructed entirely or partially on an outer circumference on the respective short-circuit ring and/or is entirely or partially embedded in the respective short-circuit ring.

3. The rotor as claimed in claim 1, wherein

a respective support ring is constructed:

(a) with or from a material from a group of materials comprising metallic materials, ceramic materials and composites, and/or

(b) with or from a same material as the respective short-circuit ring.

4. The rotor as claimed in claim 3, wherein

the materials comprise glass materials and/or carbon fiber materials.

5. The rotor as claimed in claim 1, wherein at least one of the following:

(a) the rods are constructed in or with a cast and/or joined structure,

(b) one or more of the short-circuit rings are constructed as end rings,

(c) the first material has a higher electrical conductivity than the second material,

(d) the second material has a greater mechanical strength and/or stability than the first material, or

(e) the first material and/or the second material is a material from a group comprising aluminum, copper, silver and the combinations and alloys thereof, and wherein the first material is or has copper or a copper alloy, and the second material is or has aluminum or an aluminum alloy.

6. An asynchronous machine for a drive and/or a generator of a vehicle, comprising:

a stator; and

a rotor as claimed in claim 1.

7. A vehicle, comprising:

an asynchronous machine constructed as part of a drive and/or a generator of the vehicle, wherein

the asynchronous machine comprises a rotor as claimed in claim 1.

8. The vehicle as claimed in claim 7, wherein the vehicle is a passenger car, a battery-powered electric vehicle and/or a hybrid vehicle.