ELECTRICAL MACHINE WITH HYBRID TOOTH DESIGN

• US 20200136441A1
• Filed: 10/17/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: Siemens Gamesa Renewable Energy A/S (Siemens AG)
• Original Assignee: Siemens Gamesa Renewable Energy A/S (Siemens AG)
• Inventors: Azar, Ziad, Duke, Alexander
• Granted Patent: US 11,362,550 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 1/165 Shape, form or location of the slots
• CPC Class Codes: H02K 1/187 to inner stators
• CPC Class Codes: H02K 1/265 Shape, form or location of the slots
• CPC Class Codes: H02K 2213/12 Machines characterised by the modularity of some components
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32
• CPC Class Codes: H02K 7/183 wherein the turbine is a wind turbine adaptation of a wind turbine to an electric generator F03D9/25
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

Provided is a stator segment for the stator or the rotor of an electrical machine including a segment body circumferentially extending about a longitudinal axis of the stator segment between two circumferential ends. The segment body includes: a plurality of teeth protruding according to a radial direction orthogonal to the longitudinal axis, each tooth circumferentially extending between two respective side faces, the teeth being circumferentially distributed between two end teeth of the teeth, the teeth including at least one intermediate tooth circumferentially included between the end teeth, a plurality of slots, the plurality of slots including a plurality of intermediate slots circumferentially included between the two end slots, wherein side faces of the two end teeth are inclined with or parallel to each other and the side faces of the at least one intermediate tooth are respectively parallel to each other or inclined with respect to each other.

Claims

1. A stator segment for a stator or a rotor of an electrical machine including a segment body circumferentially extending about a longitudinal axis of the stator segment between two circumferential ends, the segment body comprising:

a plurality of teeth protruding according to a radial direction orthogonal to the longitudinal axis, each tooth circumferentially extending between two respective side faces, the plurality of teeth being circumferentially distributed between two end teeth of the plurality of teeth, the plurality of teeth comprising at least one intermediate tooth circumferentially comprised between the two end teeth; and

a plurality of slots, circumferentially interposed between the plurality of teeth of the stator, the plurality of slots being circumferentially distributed between two end slots, each end slot being circumferentially comprised between a respective end tooth and a respective circumferential end, the plurality of slots comprising a plurality of intermediate slots circumferentially comprised between the two end slots;

wherein side faces of the two end teeth are inclined with respect to each other or parallel to each other and the side faces of the at least one intermediate tooth are respectively parallel to each other or inclined with respect to each other.

2. The segment as claimed in claim 1, wherein the side faces of the two end teeth are radially oriented or parallel to each other and the side faces of the at least one intermediate tooth are respectively parallel to each other or radially oriented.

3. The segment as claimed in claim 1, further comprising a coil winding arranged in the segment body, the coil winding including at least two side coils respectively housed in the end slots.

4. The segment as claimed in claim 3, wherein the coil winding is a double-layer winding including two coils in each of the intermediate slots.

5. The segment as claimed in claim 3, wherein the coil winding is a coil concentrated winding or a double-layer coil distributed winding.

6. A stator or rotor for an electrical machine including a plurality of segments as claimed in claim 1, wherein the plurality of segments are circumferentially joined together in such a way that a circumferential gap is interposed between two circumferentially adjacent stator segments.

7. An electrical machine including a stator or rotor as claimed in claim 6.

8. A wind turbine including an electrical generator including a stator or rotor as claimed in claim 6.