# US 10,483,814 B2 · Synchronous-generator pole stack

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- Number: US 10,483,814 B2
- Document ID: US10483814B2
- Status: Granted
- Kind: B2
- Application number: 14/782,265
- Filed: 2014-04-03
- Published: 2016-02-04
- Granted: 2019-11-19
- Earliest claimed: 2013-04-08
- Assignees: Wobben Properties GmbH
- Applicants: Wobben Properties GmbH
- Inventors: Ralf Kelling
- Web page: https://patentgrep.com/patent/US10483814B2

## CPC

- H02K 1/24: Rotor cores with salient poles {; Variable reluctance rotors}
- F03D 9/25: the apparatus being an electrical generator (F03D9/22 takes precedence)
- H02K 1/08: Salient poles
- H02K 7/1838: {Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine}
- H02K 2201/06: Magnetic cores, or permanent magnets characterised by their skew
- Y02E 10/72: Wind turbines with rotation axis in wind direction
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- F03D: WIND MOTORS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A synchronous generator rotor pole pack having a plurality of pole pack laminations which are offset with respect to one another, a pole shank, a pole head with at least three pole head sections is provided. A front edge of each of the at least three pole head sections is arranged at an angle with respect to the pole shank.

## Claims

### Claim 1

A synchronous generator rotor pole pack, comprising:
a plurality of pole shoes each comprising a plurality of pole pack segments, wherein each pole pack segment comprises a pole shank portion and a pole head portion, wherein the pole shank portions of the plurality of pole pack segments form a pole shank, wherein the pole head portions of the plurality of pole pack segments form a pole head having at least three pole head sections, wherein a front edge of each of the at least three pole head sections is arranged at an angle with respect to the pole shank, wherein a depth of the pole head portions of the plurality of pole pack segments are identical, wherein the pole head portions of the plurality of pole pack segments are offset with respect to adjacent pole head portions, wherein the segment in an area of the pole shank are not arranged offset with respect to each other, and wherein the pole shank is arranged as a straight continuous portion.

### Claim 2 (depends on 1)

The synchronous generator rotor pole pack according to claim 1, wherein the pole head has four pole head sections.

### Claim 3 (depends on 2)

The synchronous generator rotor pole pack according to claim 2, wherein a length of the front edges of the four pole head sections are identical.

### Claim 4 (depends on 2)

The synchronous generator rotor pole pack according to claim 2, wherein:
a first length of the front edge of the first and fourth pole head sections are identical, and
a second length of the second and third pole head sections are identical, the first length of the first and fourth pole head section not being identical with the second length of the second and third pole head sections.

### Claim 5 (depends on 1)

The synchronous generator rotor pole pack according to claim 1, wherein the pole head has a groove that is parallel to the pole shank.

### Claim 6 (depends on 1)

A synchronous generator comprising:
a generator rotor having a plurality of synchronous generator rotor pole packs according to claim 1.

### Claim 7

A wind power plant, comprising:
a synchronous generator having a plurality of pole packs, each pole pack including a plurality of pole shoes each comprising a plurality of pole pack segments, wherein each pole pack segment comprises a pole shank portion and a pole head portion, wherein the pole shank portions of the plurality of pole pack segments form a pole shank, wherein the pole head portions of the plurality of pole pack segments form a pole head having at least three pole head sections, wherein a front edge of each of the at least three pole head sections is arranged at an angle with respect to the pole shank, wherein a depth of the pole head portions of the plurality of pole pack segments are identical, wherein the pole head portions of the plurality of pole pack segments are offset with respect to adjacent pole head portions, wherein the segment in an area of the pole shank are not arranged offset with respect to each other, and wherein the pole shank is arranged as a straight continuous portion.