# US 12,003,138 B2 · Stator for a housing-free dynamoelectric rotary machine

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- Number: US 12,003,138 B2
- Document ID: US12003138B2
- Status: Granted
- Kind: B2
- Application number: 18/016,937
- Filed: 2021-04-01
- Published: 2023-08-31
- Granted: 2024-06-04
- Earliest claimed: 2021-04-01
- Assignees: Innomotics GmbH
- Applicants: Innomotics GmbH
- Inventors: Klaus Büttner; Reiner Grillenberger; Klaus Kirchner; Matthias Warmuth
- Web page: https://patentgrep.com/patent/US12003138B2

## CPC

- H02K 1/16: Stator cores with slots for windings
- H02K 1/18: Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K 1/20: with channels or ducts for flow of cooling medium
- H02K 5/15: Mounting arrangements for bearing-shields or end plates
- H02K 5/18: with ribs or fins for improving heat transfer
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A housing-free dynamoelectric rotary machine includes a stator having a material layer structure which includes a plurality of material layers arranged in a row along a rotation axis. The material layer structure includes a plurality of thickenings and a plurality of slots, with the slots arranged such that each of the slots is arranged between two respective ones of the thickenings. At least one of the slots is designed to receive a slot wedge, with a respective one of the thickenings being designed to fasten the slot wedge. An end element is arranged on an axial end of the stator and includes a connection box for supply with electrical energy. A connecting element connects the end element to the stator and is connected to the slot wedge.

## Claims

### Claim 1

A housing-free dynamoelectric rotary machine, comprising:
a stator having a material layer structure which comprises a plurality of material layers arranged in a row along a rotation axis, said material layer structure comprising a plurality of thickenings and a plurality of slots, with each of the slots arranged between two opposing surfaces of the thickenings;
with at least one of the slots having a first projection disposed on a radial end of a first one of the two opposing surfaces and directed in a rotation direction, and a second projection disposed on a radial end of a second one of the two opposing surfaces and directed against the rotation direction;
a slot wedge received in the at least one slot and captively secured in the at least one slot by the first and second projection, said slot wedge further comprising an axial bore;
an end element arranged on an axial end of the stator and comprising a connection box for supply with electrical energy; and
a connecting element designed to connect the end element to the axial bore of the slot wedge,
wherein axial end is a front axial end or a rear axial end of the stator and the slot wedge is arranged spaced from the axial end of the stator.

### Claim 2 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, wherein the axial end is a front axial end of the stator, and further comprising a further end element arranged on a rear axial end of the stator.

### Claim 3 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, wherein the end element is designed as a bearing plate.

### Claim 4 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, wherein the connecting element is a screw element.

### Claim 5 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, further comprising a foot for support, said foot being connected to the slot wedge by way of a radial bore disposed in the slot wedge.

### Claim 6 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, wherein the thickenings are configured at least partially as cooling ribs.

### Claim 7 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, wherein the material layers are connected in an integrally bonded manner.

### Claim 8 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, wherein the stator is coated with a coating.

### Claim 9 (depends on 1)

The housing-free dynamoelectric rotary machine of claim 1, wherein the material layers are connected by adhesive.