Wind Turbine Stator Plate Reinforcement for Vibration Stability

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Solution Overview

Problem

The increasing size of wind turbine generators requires a robust design for stators that can provide mechanical support while maintaining a low weight and small dimensions, as conventional designs face issues with vibrations and instability.

Innovation Solution

A stator design featuring reinforcement structures shaped as plates coupled between end plates, allowing force transmission and enhancing lateral stiffness, combined with venting holes and blower devices for cooling and ventilation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the stator size is increased to meet growing renewable energy demand, then the electrical output capacity is improved, but the mechanical stability and robustness deteriorate due to unwanted vibrations and instability

Engineering Contradiction:

Improveelectrical output capacityVSAvoidmechanical stability

Core Design Contradiction:

PowerVSStability of the object's composition

Solution Approach 1:

The reinforcement structure is divided into multiple plate elements arranged in a specific pattern between the end plates. This segmentation allows the structure to distribute and manage stresses more effectively across the large stator volume, maintaining mechanical stability while supporting increased power capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcement structure extends in the radial direction between the end plates, adding a dimensional element that was previously absent. This radial reinforcement provides additional structural support and stiffness to counteract vibrations in large-diameter stators without increasing axial length.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Power

If the stator size is increased to achieve higher electrical output, then the power generation capacity is improved, but the weight and dimensions of the generator increase

Engineering Contradiction:

Improveelectrical outputVSAvoidgenerator weight

Core Design Contradiction:

PowerVSWeight of stationary object

Solution Approach 1:

The reinforcement structure uses thin plate elements that provide significant structural reinforcement while minimizing added weight. These plate-like components offer high strength-to-weight ratio, enabling increased stator size and power capacity without proportionally increasing generator weight.

Inventive Principle:

Principle #30Flexible shells and thin films

3Device complexity

If conventional frame body design is used for mechanical support, then the structural simplicity is maintained, but the robustness and lateral stiffness are insufficient for large stator sizes

Engineering Contradiction:

Improvestructural simplicityVSAvoidlateral stiffness

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The reinforcement structure acts as an intermediary element between the end plates, providing additional mechanical support and force transmission paths. This intermediate structure enhances lateral stiffness and robustness without fundamentally changing the conventional frame body design or end plate configuration.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12620869B2Stator of an electric generator having a reinforcement structure

Publication Date: 2026.05.05 SIEMENS GAMESA RENEWABLE ENERGY AS

AI summary

A stator for a wind turbine generator is provided, the stator including a first end plate and a second end plate spaced apart from each other in an axial direction of the wind turbine generator, and a reinforcement structure shaped as a plate and arranged between, and fixed to the first end plate and the second end plate, wherein the reinforcement structure is configured for coupling the first end plate and the second end plate, such that a force is transmissible between the first end plate and the second end plate.