Laminated Core Adhesion Ratio for Low-Strain Magnetic Performance
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Solution Overview
Problem
Conventional laminated cores have room for improvement in enhancing magnetic properties, as they face issues with relative displacement and strain due to inadequate adhesion between electrical steel sheets, which affects their magnetic performance.
Innovation Solution
A laminated core design featuring electrical steel sheets with an insulation coating and an adhesion part that adheres the sheets together, with an adhesion area ratio between 1% and 40%, ensuring effective restriction of relative displacement and minimizing strain, thereby enhancing magnetic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If electrical steel sheets are fixed by fastening, then relative displacement is restricted, but the electrical steel sheets are greatly strained and magnetic properties are greatly affected
Solution Approach 1:
The patent replaces the mechanical fastening system with a chemical adhesion system. The adhesion part uses adhesive material to bond electrical steel sheets together, substituting the mechanical fastening method. This substitution allows the sheets to be fixed without the great strain caused by fastening, thereby restricting relative displacement while preserving magnetic properties.
Solution Approach 2:
The patent changes the adhesion area ratio parameter to an optimal range (1% to 40% of the electrical steel sheet area). By controlling this parameter, the adhesion part provides sufficient bonding to restrict relative displacement while limiting the area under compression to minimal strain levels, thus maintaining magnetic properties.
2Stability of the object's composition
If adhesion area ratio is increased to ensure adhesion, then relative displacement is restricted, but strain generated in electrical steel sheet increases
Solution Approach 1:
The patent optimizes the adhesion area ratio parameter within the range of 1% to 40% of the electrical steel sheet area. This parameter optimization ensures sufficient adhesion strength to restrict relative displacement while limiting the compressed area to levels that generate minimal strain, thereby preserving magnetic properties.
Solution Approach 2:
The patent applies adhesion partially rather than across the entire sheet surface. By using an adhesion area ratio of only 1% to 40%, the patent provides just enough adhesion to restrict relative displacement without excessive bonding that would generate harmful strain, thus maintaining magnetic properties.
3Strength
If adhesion area ratio is below 1%, then strain is minimized, but adhesion is insufficient and relative displacement occurs
Solution Approach 1:
The patent sets the lower limit of the adhesion area ratio at 1% of the electrical steel sheet area. This parameter setting ensures that sufficient adhesion is provided to restrict relative displacement during winding and operation, while keeping the area small enough to minimize strain and preserve magnetic properties.
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 solution effectively restricts relative displacement and reduces strain in the electrical steel sheets, leading to improved magnetic properties and better adhesion strength, even when winding is applied to the laminated core.
Implementation Method 1
an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other
Implementation Method 2
coated with an insulation coating on both surfaces thereof
Data Source
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AI summary
A laminated core includes a plurality of electrical steel sheets stacked on each other and coated with an insulation coating on both surfaces thereof, and an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein an adhesion area ratio of the electrical steel sheet by the adhesion part is 1% or more and 40% or less.