Non-magnetizable 3D Printed Webs in Electrical Steel Rotor Plates
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Solution Overview
Problem
Electrical machine rotors face a trade-off between mechanical stability and magnetic efficiency due to the use of webs that stabilize against centrifugal forces but lead to leakage fluxes, reducing efficiency.
Innovation Solution
Incorporating non-magnetizable webs printed using a 3D printing process into the recesses of magnetizable electrical steel sheets, arranged parallel to specific axes or radii, to enhance stability without causing magnetic bridging and leakage fluxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If webs are provided in the cutouts to bridge flux guide surfaces, then mechanical stability of the rotor sheet is improved, but leakage fluxes occur which reduce magnetic efficiency
Solution Approach 1:
The patent applies local quality by making the webs non-magnetizable in specific locations where they bridge flux guide surfaces. This allows the webs to provide mechanical stability while preventing magnetic flux leakage, as the non-magnetizable material blocks the formation of unwanted magnetic paths between adjacent flux guide surfaces.
Solution Approach 2:
The patent uses composite materials by combining magnetizable electrical steel sheets with non-magnetizable web structures. The electrical steel sheets provide the necessary magnetic properties for the rotor, while the non-magnetizable webs provide mechanical stability without creating leakage fluxes, creating a composite structure with optimized properties.
2Loss of energy
If recesses are extended to the edge of the individual sheet for magnetic reasons, then magnetic field guidance is improved, but mechanical stability deteriorates
Solution Approach 1:
The patent applies local quality by extending recesses to the edge of individual sheets in specific areas where magnetic field guidance is needed, while providing non-magnetizable outer webs at these extended regions to compensate for the reduced mechanical stability. This allows optimal magnetic performance in critical areas while maintaining overall structural integrity.
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 achieves high magnetic efficiency and mechanical stability by preventing magnetic bridging while ensuring non-magnetizable webs do not touch, thus maintaining efficiency and stability.
Implementation Method 1
The electrical steel sheet has at least one web in each of the recesses, wherein the at least one web is printed from a non-magnetizable material using a 3D printing process
Data Source
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AI summary
The aim of the invention is to increase the magnetic efficiency at high stability in particular of rotor plates. This aim is achieved by providing an electric metal sheet (9) for an electric machine, the base of which is an individual sheet (5) made of magnetizable material, wherein the individual sheet (5) has multiple cutouts (1). At least one web (10) is provided in one of the cutouts (1), wherein the web (10) is printed from a non-magnetizable material by way of a 3-D printing process.