Additive Rotor-Stator Sheets With MHD-Aligned Magnetic Conductivity
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Solution Overview
Problem
Current methods for producing metal sheets for reluctance motors face challenges in achieving improved power factors and magnetic properties due to issues such as eddy currents, structural defects, and limitations in thickness and manufacturing complexity, particularly with the use of silicon-alloyed electrical metal sheets.
Innovation Solution
An additive manufacturing method incorporating magnetohydrodynamics (MHD) is used to influence the structure of molten metal during the transition from liquid to solid state, aligning the magnetic domains and reducing defects, allowing for the production of metal sheets with enhanced magnetic conductivity and reduced core losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional punching or laser cutting methods are used to produce metal sheets for reluctance motors, then manufacturing complexity is reduced, but structural defects and reduced magnetic properties occur
Solution Approach 1:
The patent replaces conventional mechanical punching or laser cutting methods with additive manufacturing technology. This substitution eliminates the harmful effects of mechanical stress and heat-affected zones caused by traditional methods, thereby preserving the magnetic properties of the metal sheets while achieving complex geometries without compromising reliability.
2Loss of energy
If silicon-alloyed electrical metal sheets are used to reduce eddy currents, then core losses are reduced, but manufacturing precision and magnetic properties deteriorate
Solution Approach 1:
The patent changes the manufacturing parameters from conventional subtractive methods to additive manufacturing processes. This parameter change allows for precise control of layer thickness and material deposition, achieving manufacturing precision comparable to or exceeding traditional methods while maintaining the energy-loss-reducing benefits of silicon-alloyed sheets.
Solution Approach 2:
The additive manufacturing process allows for preliminary action in terms of material placement and structural formation before final assembly. By building the metal sheets layer by layer with precise control, the manufacturing process achieves high precision while accommodating silicon-alloyed materials without deteriorating magnetic properties.
3Reliability
If metal sheet thickness is reduced to improve motor performance, then power factor is improved, but manufacturing capability and structural integrity worsen
Solution Approach 1:
The patent applies segmentation by constructing metal sheets through additive manufacturing layer by layer. This segmentation into thin layers enables the production of very thin metal sheets with controlled thickness that would be difficult to achieve with conventional methods, thereby improving power factor while maintaining manufacturing capability through precise layer-by-layer construction.
Solution Approach 2:
The additive manufacturing process enables parameter changes in terms of layer thickness control, allowing for the production of metal sheets with optimized thin dimensions. This parameter control improves the power factor by reducing eddy current losses while maintaining structural integrity through precise manufacturing capability.
4Reliability
If additive manufacturing is used to produce metal sheets with complex geometries, then magnetic properties are enhanced, but manufacturing time and complexity increase
Solution Approach 1:
The patent merges multiple manufacturing operations into a single additive manufacturing process. By combining material deposition, geometric formation, and structural creation in one integrated process, complex geometries with enhanced magnetic properties are achieved without the sequential steps required by conventional methods, thereby reducing overall manufacturing time despite the complexity of the parts.
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 method enables the production of metal sheets with improved magnetic properties and power factors, reducing structural defects and thickness limitations, thereby enhancing the performance of reluctance motors.
Implementation Method 1
An additive manufacturing method incorporating magnetohydrodynamics (MHD) is used to influence the structure of molten metal during the transition from liquid to solid state, aligning the magnetic domains and reducing defects
Implementation Method 2
The melt is influenced in the liquid phase on a mounting plate by an applied magnetic field of a stator/rotor during the transition from the liquid phase to the solid state
Data Source
AI summary
A method is used for producing metal sheets for packets of metal sheets of a rotor and of a stator for three-phase drives, in particular for reluctance machines (reluctance motors) made of magnetic, in particular magnetically soft materials by means of additive production processes, in which the magnetizable material is melted and fed to at least one print head which applies the melted material to form a rotor/stator sheet. The melted material is influenced by an applied magnetic field so that the finished rotor/stator sheet has an area with high magnetic conductivity determining the desired direction of flow.