# US 11,121,609 B2 · Method for producing a cage rotor

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- Number: US 11,121,609 B2
- Document ID: US11121609B2
- Status: Granted
- Kind: B2
- Application number: 15/986,563
- Filed: 2018-05-22
- Published: 2018-09-20
- Granted: 2021-09-14
- Earliest claimed: 2015-11-23
- Assignees: Bayerische Motoren Werke Aktiengesellschaft
- Applicants: Bayerische Motoren Werke Aktiengesellschaft
- Inventors: Manfred Siegling; Daniel Loos; Holger Ulbrich
- Web page: https://patentgrep.com/patent/US11121609B2

## CPC

- H02K 15/023: Cage rotors
- H02K 1/26: Rotor cores with slots for windings
- H02K 3/12: arranged in slots
- H02K 15/09: by laying conductors into slotted rotors
- H02K 17/20: having deep-bar rotors
- H02K 2201/06: Magnetic cores, or permanent magnets characterised by their skew
- Y10T 29/49012: Rotor
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for producing a cage rotor for an asynchronous machine has the following steps: providing a laminated rotor core made of a plurality of stacked rotor laminations which each have a plurality of rotor lamination grooves distributed in the circumferential direction; placing rod-shaped wire bundles, which are each made up of a plurality of wires, into the rotor lamination grooves; rotating the individual rotor laminations relative to each other, thereby deforming the wire bundles; placing short-circuit rings on both end faces of the laminated rotor core, and connecting the wire bundles to the short-circuit rings.

## Claims

### Claim 1

A method for producing a squirrel cage rotor for an asynchronous machine, the method comprising the steps of:
providing a laminated rotor core comprising a plurality of stacked individual rotor cores which in each case comprise a plurality of rotor core grooves distributed in a circumferential direction;
positioning rod-shaped wire packs, which are constructed in each case from a plurality of wires, in the rotor core grooves;
twisting the individual rotor cores relative to one another;
positioning short circuit rings on both end sides of the laminated rotor core; and
connecting the wire packs to the short circuit rings;
wherein the individual rotor cores are twisted during the step of twisting such that the wire packs are V-shaped or W-shaped as viewed inward in a radial direction of the squirrel cage rotor.

### Claim 2 (depends on 1)

The method as claimed in claim 1, further comprising the step of:
pressing the plurality of wires to one another in order to configure a wire pack.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein
the wire packs are constructed in each case from a plurality of wire meshes, and each wire mesh comprises a plurality of wires.

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein
the rotor core grooves, with the wire packs which are situated therein, are filled with a material which differs from the material of the wires.

### Claim 5 (depends on 4)

The method as claimed in claim 4, wherein
the rotor core grooves are filled with plastic material.