Stator segment, electric machine for a wind turbine and method for producing a stator segment

By designing the support section and connecting plate frame structure and utilizing the welding connection between the connecting elements and the connecting plate, the cost and stability issues in the production of wind turbine stators were solved, and stator production with simplified assembly and improved safety was achieved.

CN122603451APending Publication Date: 2026-08-18FLENDER GMBH
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Patent Information

Application Number
CN202580010576.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-01-19
Filing Date
2025-01-03
Publication Date
2026-08-18

AI Technical Summary

Technical Problem

Existing technologies make it difficult to produce wind turbine stators cost-effectively and simply, especially due to difficulties and instability issues in welding lamination stacks.

Method used

The frame structure consists of at least two support sections and connecting plates. Stable stator sections are formed by inserting connecting elements into the intermediate space in the axial and radial directions and welding them to the connecting plates. This avoids direct welding of laminations and stacking, and the stator windings are supported by the welding connection between the connecting elements and the connecting plates.

Benefits of technology

This technology enables cost-effective stator production, improves operational safety and lifespan, simplifies the assembly process, reduces the number of parts and welding complexity, and ensures the stability and electromagnetic performance of the stator.

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Abstract

A stator segment (26) for a stator of an electrical machine (20) of an industrial wind turbine (10) is provided, comprising at least two support segments (28) which extend at least partially in a circumferential direction and are spaced apart from one another in an axial direction for transmitting loads occurring during operation, a first connecting plate (32) which extends in the axial direction and is inserted into the support segments (28) at an angle to the radial direction, a second connecting plate (34) which extends in the axial direction and is inserted into the support segments (28) at an angle to the radial direction, wherein an intermediate space (36) remains free between the first connecting plate (32) and the second connecting plate (34), and a connecting element (38) which is inserted into the intermediate space (36) in the radial direction for connection to a laminated core (40) carrying stator windings, wherein the connecting element (38) is connected to the first connecting plate (32) by a first weld seam (46) and to the second connecting plate (34) by a second weld seam (48). As a result of the fastening of the laminated core (40) by the connecting element (38) and by the welding of the connecting element (38) in the intermediate space (36) between the connecting plates (32, 34), the stator of the electrical machine (20) can be produced cost-effectively and simply.
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