Segmented Adhesive Stator Core for Cooling and Deformation Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing stator cores in rotating electrical machines face challenges in effective cooling and deformation due to temperature increases and handling processes.

Innovation Solution

A stator core design with varying adhesive application regions, including a first region covering the core back and teeth, and a second region with a smaller area, is implemented to enhance cooling and prevent deformation by using adhesives strategically at both ends and central portions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If adhesive is applied to bond thin steel plates throughout the entire stator core, then structural integrity is improved, but cooling efficiency deteriorates due to blocked coolant flow paths

Engineering Contradiction:

Improvestructural integrityVSAvoidcooling efficiency

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The adhesive application is segmented into two distinct regions: a first region with full adhesive coverage for structural bonding, and a second region with reduced or no adhesive coverage for cooling. This segmentation allows simultaneous achievement of structural integrity and thermal management by spatially separating the functions of bonding and cooling.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different adhesive application qualities are applied to different regions of the stator core. The first region receives complete adhesive application for maximum bonding strength, while the second region receives reduced adhesive application to maintain coolant flow paths. This local differentiation resolves the contradiction by optimizing each region for its primary function.

Inventive Principle:

Principle #3Local quality

2Stability of the object's composition

If adhesive is applied to bond thin steel plates, then deformation prevention is improved, but thermal management deteriorates due to reduced heat dissipation

Engineering Contradiction:

Improvedeformation preventionVSAvoidthermal management

Core Design Contradiction:

Stability of the object's compositionVSTemperature

Solution Approach 1:

The stator core is divided into two adhesive application regions: the first region provides comprehensive deformation prevention through full adhesive coverage, while the second region prioritizes thermal management through reduced adhesive coverage. This segmentation enables simultaneous achievement of both stability and thermal performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different adhesive application strategies are applied locally to different regions. The first region uses full adhesive coverage to prevent deformation during handling and operation, while the second region uses reduced adhesive coverage to maintain open coolant channels for effective heat dissipation.

Inventive Principle:

Principle #3Local quality

3Temperature

If adhesive application area is reduced to improve cooling, then cooling efficiency is improved, but structural integrity deteriorates due to insufficient bonding

Engineering Contradiction:

Improvecooling efficiencyVSAvoidstructural integrity

Core Design Contradiction:

TemperatureVSStrength

Solution Approach 1:

The adhesive application is segmented into two functional regions: the first region maintains full adhesive coverage to ensure structural integrity, while the second region reduces adhesive coverage to improve cooling efficiency. This segmentation allows the structure to maintain strength where needed while enabling thermal management where heat dissipation is critical.

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

The design effectively cools the stator core and prevents deformation by enhancing thermal management and structural integrity through targeted adhesive application.

Implementation Method 1

a stator core formed by laminating a large number of thin steel plates and bonding the result with an adhesive or the like

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Implementation Method 2

When the rotating electrical machine is driven, a temperature increases toward the tip side of the teeth around which the windings are wound

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS12476499B2Stator core of rotating electrical machine and rotating electrical machine

Publication Date: 2025.11.18 ASTEMO LTD

AI summary

Provided is a stator core of a rotating electrical machine in which a core back and teeth are formed by laminating a plurality of thin steel plates with an adhesive interposed therebetween. The stator core includes a first stator core that is formed by applying the adhesive to a first region covering the core back and the teeth between the plurality of thin steel plates, and a second stator core that is formed by applying the adhesive to a second region, which has an area smaller than an area of the first region, between the plurality of thin steel plates. The first stator core is disposed at least at one end of the stator core in a laminating direction of the thin steel plates.