# US 2014/0152140 A1 · Electric Machine And Method For Winding A Coil Of An Electric Machine

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- Number: US 2014/0152140 A1
- Document ID: US20140152140A1
- Status: Published application
- Kind: A1
- Application number: 13/980,060
- Filed: 2012-01-18
- Published: 2014-06-05
- Earliest claimed: 2011-01-24
- Assignees: Brose Fahzeugteile GmhN & Co. Kommanditgesellschaf Wurzburg
- Inventors: Stefan Keul
- Web page: https://patentgrep.com/patent/US20140152140A1

## CPC

- H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32)
- H02K 15/043: winding flat conductive wires or sheets
- H02K 3/18: Windings for salient poles
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

The present invention relates to an electric machine, in particular a brushless permanent magnet motor, comprising a stator which comprises a plurality of teeth having at least one needle-wound winding strand, the at least one winding strand having at least two windings on adjacent teeth which are arranged in series, the at least two windings each comprising at least one winding layer, a needle channel being provided which is formed between the at least two windings by a crossing portion of the at least two windings and is filled at least in part. The present invention further relates to a method for winding a coil of an electric machine.

## Claims

### Claim at position 1

1-10. (canceled)

### Claim 11

An electric machine comprising:
a stator which comprises a plurality of teeth having at least one needle-wound winding strand, the at least one winding strand having at least two windings on adjacent teeth which are arranged in series, the at least two windings each comprising at least one winding layer, wherein a needle channel is provided which is formed between the at least two windings by a crossing portion of the at least two windings and is filled at least in part.

### Claim 12 (depends on 11)

The machine of claim 11, wherein a final winding layer of the at least two winding layers is wound around adjacent teeth in a figure of eight, a crossing portion being formed in the needle channel.

### Claim 13 (depends on 11)

The machine of claim 11, wherein the stator comprises twelve or 12+n*6 grooves, wherein n is a natural number.

### Claim 14 (depends on 11)

The machine of claim 11, wherein the at least two windings have opposite winding directions.

### Claim 15 (depends on 11)

The machine of claim 11, wherein the machine is a brushless permanent magnet motor.

### Claim 16

A method of winding a coil of an electric machine, by means of a needle winder, comprising the steps of:
providing a coil of a winding carrier having a plurality of teeth, the coil comprising at least two windings on adjacent teeth which are arranged in series and the at least two windings each comprising at least one winding layer;
producing the respective at least one winding layer of a first of the at least two windings by winding a winding wire around a first tooth;
producing the respective at least one winding layer of a second of the at least two windings by winding the winding wire around a second tooth; and
producing the final winding layer by winding the winding wire around both the second tooth and the first tooth.

### Claim 17 (depends on 16)

The method of claim 16, wherein in the step of producing the final winding layer, the winding wire is wound around both the second tooth and the first tooth in a figure of eight.

### Claim 18 (depends on 16)

The method of claim 16, wherein the first winding of the at least two windings is connected to the second of the at least two windings via a wire bridge of the winding wire.

### Claim 19 (depends on 16)

The method of claim 16, wherein there are at least two windings.

### Claim 20 (depends on 16)

The method of claim 16, wherein the needle winder winds with at least one needle or with at least two needles synchronously.

### Claim 21 (depends on 16)

The method of claim 16, wherein the winding carrier of the electric machine is in the form of a stator of the electric machine.