# US 2013/0154437 A1 · Support ring for electric machine rotors

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- Number: US 2013/0154437 A1
- Document ID: US20130154437A1
- Status: Published application
- Kind: A1
- Application number: 13/331,361
- Filed: 2011-12-20
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Assignees: GM Global Technology Operations LLC
- Inventors: Edward L. Kaiser; Micah Joel Fuchs
- Web page: https://patentgrep.com/patent/US20130154437A1

## CPC

- H02K 3/527: {applicable to rotors only}
- H02K 1/24: Rotor cores with salient poles {; Variable reluctance rotors}
- H02K 1/30: using intermediate parts, e.g. spiders
- H02K 2203/12: Machines characterised by the bobbins for supporting the windings
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A support ring for a rotor having a core and a plurality of windings. The support ring includes an annular base, a plurality of fingers, and a plurality of loaded edges. The plurality of fingers extend radially outward from the annular base, and each generally corresponds to one of the windings. The plurality of loaded edges extend axially from the fingers and are disposed radially outward of the windings.

## Claims

### Claim 1

A support ring for a rotor having a core and a plurality of windings, the support ring comprising:
an annular base;
a plurality of fingers extending radially outward from the annular base, wherein each of the fingers corresponds to one of the windings; and
a plurality of loaded edges extending axially from the fingers and disposed radially outward of the windings.

### Claim 2 (depends on 1)

The support ring of claim 1, wherein the fingers are disposed between the windings and the core.

### Claim 3 (depends on 2)

The support ring of claim 2, wherein the annular base, the fingers, and the loaded edges are formed as a one-piece stamping.

### Claim 4 (depends on 3)

The support ring of claim 3, wherein the support ring is formed from a substantially-nonmagnetic material.

### Claim 5

A rotor, comprising:
a hub;
a core disposed radially outward of the hub, relative to an axis of the rotor, and having a plurality of rotor teeth extending axially outward therefrom;
a plurality of windings wrapped around the rotor teeth;
a first support ring, having:
a first disc,
a plurality of first fingers extending radially outward from the first disc, wherein each of the first fingers corresponds to one of the windings, and
a plurality of first loaded edges extending axially from the first fingers and disposed radially outward of the windings; and
a second support ring, having:
a second disc,
a plurality of second fingers extending radially outward from the second disc, wherein each of the second fingers corresponds to one of the windings, and
a plurality of second loaded edges extending axially from the second fingers and disposed radially outward of the windings.

### Claim 6 (depends on 5)

The rotor of claim 5,
wherein the first fingers are disposed between the windings and a first axial side of the rotor teeth, and
wherein the second fingers are disposed between the windings and a second axial side of the rotor teeth.

### Claim 7 (depends on 6)

The rotor of claim 6, further comprising a plurality of bobbin rings, wherein each bobbin ring substantially surrounds one of the rotor teeth.

### Claim 8 (depends on 7)

The rotor of claim 7, wherein the bobbin rings are disposed between the windings and the first and second fingers.

### Claim 9 (depends on 8)

The rotor of claim 8, wherein the first support ring and the second support ring are substantially nonmagnetic.

### Claim 10 (depends on 9)

The rotor of claim 9, further comprising an annular shelf formed on the hub,
wherein the first support ring is trapped between the annular shelf and first axial side of the core, and
wherein the second support ring is press-fit onto the hub such that the second support ring traps the core and the first support ring against the annular shelf

### Claim 11 (depends on 10)

The rotor of claim 10,
wherein the first disc, the first fingers, and the first loaded edges of the first support ring are formed as a one-piece stamping, and
wherein the second disc, the second fingers, and the second loaded edges of the second support ring are formed as a one-piece stamping.