# US 9,438,078 B2 · Arrangement of coil wires in a rotor of an electric motor

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- Number: US 9,438,078 B2
- Document ID: US9438078B2
- Status: Granted
- Kind: B2
- Application number: 13/930,370
- Filed: 2013-06-28
- Published: 2014-01-09
- Granted: 2016-09-06
- Earliest claimed: 2012-06-29
- Assignees: Nidec Motors & Actuators (Germany) GmbH
- Applicants: Nidec Motors & Actuators (Germany) GmbH
- Inventors: Juergen Schmid
- Web page: https://patentgrep.com/patent/US9438078B2

## CPC

- H02K 1/265: {Shape, form or location of the slots}
- H02K 1/165: {Shape, form or location of the slots}
- H02K 3/12: arranged in slots
- H02K 13/04: Connections between commutator segments and windings
- H02K 15/22: Shaping or compacting conductors in slots or around salient poles (H02K15/28 takes precedence)
- H02K 23/00: DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K 23/30: having lap or loop windings
- H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32)
- H02K 3/325: {for windings on salient poles, such as claw-shaped poles}
- Y10T 29/49009: Dynamoelectric machine
- 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

An armature for an electric motor, the armature comprising a plurality of teeth and a plurality of cavities, wherein each one of the cavities is arranged between two of the plurality of teeth, and wherein at least one of the plurality of cavities is configured and arranged for receiving coil windings adjacent to a wall portion of the at least one cavity, wherein the at least one of the plurality of cavities comprises a switching wire receptor.

## Claims

### Claim 1

An armature for an electric motor, the armature comprising:
a plurality of teeth and a plurality of cavities, wherein each one of the cavities is arranged between two of the plurality of teeth, and wherein at least one of the plurality of cavities is configured and arranged for receiving coil windings adjacent to a wall portion of the at least one cavity, wherein the at least one of the plurality of cavities comprises a switching wire receptor;
wherein the switching wire receptor comprises a recess in a wall portion of the at least one of the plurality of cavities for receiving a switching wire; and
wherein the recess has a depth larger than the diameter of the switching wire.

### Claim 2 (depends on 1)

The armature of claim 1, wherein the at least one of the plurality of cavities has a radial innermost wall portion and wherein the switching wire receptor is arranged at the radial innermost wall portion.

### Claim 3 (depends on 1)

The armature of claim 1, wherein the switching wire receptor has a guiding surface for at least one switching wire.

### Claim 4 (depends on 1)

The armature of claim 1, wherein the at least one cavity has two substantially opposite guiding wall portions for coil wires.

### Claim 5 (depends on 4)

The armature of claim 4, wherein the two substantially opposite guiding wall portions form a tapered cavity which is tapered towards the radial innermost wall portion.

### Claim 6 (depends on 1)

The armature of claim 1, wherein the two substantially opposite wall portions form a tapered receptor which is tapered towards the radial innermost wall portion.

### Claim 7 (depends on 1)

The armature of claim 1, wherein the wall portion of the cavity is a first wall portion, and the cavity further comprises a second wall portion substantially parallel and opposite to the first wall portion.

### Claim 8 (depends on 1)

The armature of claim 1, wherein the switching wire is a terminal end portion of the coil wire.

### Claim 9 (depends on 1)

An electric motor comprising an armature according to claim 1.

### Claim 10

An armature for an electric motor, the armature comprising:
a plurality of teeth and a plurality of cavities, wherein each one of the cavities is arranged between two of the plurality of teeth, and wherein at least one of the plurality of cavities is configured and arranged for receiving coil windings adjacent to a wall portion of the at least one cavity, wherein the at least one of the plurality of cavities comprises a switching wire receptor;
wherein the switching wire receptor comprises a recess in a wall portion of the at least one of the plurality of cavities for receiving a switching wire; and
wherein the recess has a depth substantially corresponding to the diameter of the switching wire.

### Claim 11 (depends on 1)

The armature of claim 1, wherein an insulator is arranged on a surface of the teeth.

### Claim 12 (depends on 10)

The armature of claim 10, wherein an insulator is arranged on a surface of the teeth.