Laminated Core Block Adhesion Layout for Low Iron Loss
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Solution Overview
Problem
The magnetic properties of existing laminated cores are not adequately improved, leading to issues with relative displacement and strain-induced deterioration in electrical steel sheet pieces.
Innovation Solution
A laminated core configuration with an adhesion area ratio between 1% and 60% is implemented, using an adhesion part to adhere electrical steel sheet pieces while maintaining a non-adhesion region to minimize strain and suppress iron loss, with specific designs for the stator yoke and tooth parts to optimize magnetic flux distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If electrical steel sheet pieces are adhered to each other by fastening, then relative displacement is suppressed, but plastic strain is applied and magnetic properties deteriorate
Solution Approach 1:
The patent replaces the mechanical fastening system with a chemical adhesion system. Instead of using mechanical fasteners that apply plastic strain, an adhesion part (chemical bonding agent) is used to bond electrical steel sheet pieces together. This substitution eliminates plastic strain while maintaining relative displacement suppression, thereby preserving magnetic properties.
Solution Approach 2:
The patent changes the bonding mechanism from mechanical (fastening) to chemical (adhesion). By controlling the adhesion area ratio within 1% to 60%, the patent optimizes the balance between suppressing relative displacement and minimizing strain on the electrical steel sheet pieces, thus maintaining magnetic properties.
2Strength
If adhesion area ratio is increased, then adhesion strength is improved, but strain on electrical steel sheet pieces increases
Solution Approach 1:
The patent optimizes the adhesion area ratio parameter within the range of 1% to 60%. This parameter optimization ensures sufficient adhesion strength to suppress relative displacement while limiting the strain applied to the electrical steel sheet pieces, thereby maintaining magnetic properties.
Solution Approach 2:
The patent applies partial adhesion rather than complete adhesion across the entire surface of electrical steel sheet pieces. By limiting the adhesion area to 1%-60% of the total surface area, the patent achieves sufficient bonding strength while leaving non-adhesion regions that prevent excessive strain, thus preserving 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
This configuration effectively regulates relative displacement, reduces strain, and enhances magnetic properties by minimizing iron loss and ensuring adhesion strength, facilitating efficient winding and improving overall core performance.
Implementation Method 1
an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other
Data Source
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AI summary
What is disclosed is a core block, a plurality thereof constituting a laminated core by being connected in an annular shape, the core block including: a plurality of electrical steel sheet pieces stacked to each other; and an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other, in which an adhesion area ratio of the electrical steel sheet piece by the adhesion part is 1% or more and 60% or less.