Segmented Stator Assembly for Radial Rotor Access

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Solution Overview

Problem

Existing stators in electromechanical systems, such as generators and motors, are continuous structures that encircle the entire rotor, making maintenance and repair difficult, requiring significant disassembly and occupying valuable space, especially in limited environments.

Innovation Solution

A segmented stator comprising separable stator segments that extend partway around the rotor, allowing individual segments to be removed radially without disassembling the entire stator, and incorporating a magnetic field generator to induce electrical current through electromagnetic interaction with a toothed rotor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a continuous annular stator is used, then the structural integrity and electromagnetic performance are improved, but the ease of maintenance and space requirements worsen

Engineering Contradiction:
Improvestructural integrityVSAvoidease of maintenance
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The stator is divided into multiple separable stator segments that can be independently removed. Each segment maintains the necessary structural integrity and electromagnetic functionality while allowing individual access to the rotor without requiring complete stator disassembly, thus resolving the contradiction between structural integrity and ease of maintenance.

Inventive Principle:
Principle #1Segmentation

2Reliability

If a continuous annular stator is used, then the electromagnetic performance is improved, but the space occupied increases

Engineering Contradiction:
Improveelectromagnetic performanceVSAvoidspace occupied
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The stator is segmented into multiple separate units that can be arranged around the rotor. This segmentation allows for more flexible spatial arrangement and reduces the overall space occupied by the stator assembly while maintaining the necessary electromagnetic performance through proper positioning and design of each segment.

Inventive Principle:
Principle #1Segmentation

3Stability of the object's composition

If a continuous annular stator is used, then the structural stability is improved, but the accessibility to internal components worsens

Engineering Contradiction:
Improvestructural stabilityVSAvoidaccessibility to internal components
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The stator is divided into separable segments that can be independently removed to provide direct access to the rotor and internal components. Each segment is designed to maintain structural stability when in place, while the segmented nature allows easy removal and reinstallation, thus resolving the contradiction between structural stability and accessibility.

Inventive Principle:
Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Facilitates easier maintenance and reduces spatial requirements by enabling radial removal of stator segments, improving serviceability and reducing space usage while generating electrical current through magnetic field changes.

Implementation Method 1

a magnetic field generator arranged to generate a magnetic field between the stator portions

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentEP3683928B1Electromechanical system
Publication Date: 2026.04.22 ROLLS ROYCE PLC
  • EP3683928B1 patent drawingFigure 1A~1B
  • EP3683928B1 patent drawingFigure 2~3
  • EP3683928B1 patent drawingFigure 4~5

AI summary

The present disclosure relates to an electromechanical system comprising a toothed rotor and a stator segment. The stator segment comprises an armature coil defining a coil interior. The stator segment further comprises first and second stator portions, each stator portion comprising connected inner and outer radially extending poles. Each of the inner poles passes through the coil interior and each of the outer poles is provided outside of the coil interior. The stator segment further comprises a bridge spacing the stator portions and the bridge comprises a magnetic field generator arranged to generate a magnetic field between the stator portions.