3D-Printed Soft Magnetic Thin-Wall Cores for Lower Eddy Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current additive manufacturing techniques face challenges in producing soft-magnetic components with low power losses and improved performance, particularly for complex geometries required in devices like transformers and electric motors, as traditional methods are limited by hysteresis and eddy current losses.
Innovation Solution
The development of iron-based alloys, such as Fe-3Si and Fe-6Si, with unique geometries like Hilbert curve and square spiral patterns, fabricated using additive manufacturing methods that create continuous thin walls with internal void regions, reducing eddy current losses and enhancing magnetic flux distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional additive manufacturing methods are used to produce soft-magnetic components, then manufacturing capability is improved, but power losses due to hysteresis and eddy currents increase
Solution Approach 1:
The patent segments the continuous magnetic path into multiple isolated thin-walled structures with internal void regions. These segmented structures break up eddy current paths while maintaining magnetic flux continuity through the thin walls, thereby reducing eddy current losses while preserving manufacturing capability through additive manufacturing
Solution Approach 2:
The patent introduces internal void regions within the thin-walled additively manufactured structures. These voids act as magnetic insulation barriers that disrupt eddy current formation while allowing magnetic flux to pass through the thin alloy walls, effectively reducing power losses without compromising the manufactured component's functionality
2Reliability
If complex geometries are used to reduce power losses, then magnetic performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces traditional mechanical lamination and assembly processes with additive manufacturing technology. The complex thin-walled geometries with internal voids that would be difficult to manufacture mechanically are easily created through additive manufacturing, allowing complex shapes to be produced without proportionally increasing manufacturing complexity
3Loss of energy
If thin wall structures are used to reduce eddy current losses, then power losses are reduced, but structural integrity may be compromised
Solution Approach 1:
The patent employs iron-based alloys with specific compositions (such as Fe-Si alloys with controlled carbon and impurity levels) that provide both the magnetic properties needed for low eddy current losses and the mechanical strength required for structural integrity. The additive manufacturing process further enhances integrity by creating controlled grain structures and minimizing defects in the thin-walled structures
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
These alloys and geometries result in reduced power losses and improved magnetic performance, enabling the creation of soft-magnetic devices with enhanced efficiency and complex geometries that cannot be achieved with conventional methods.
Implementation Method 1
soft-magnetic components for devices like transformers and electric motors
Implementation Method 2
reducing eddy current losses and enhancing magnetic flux distribution
Data Source
AI summary
Disclosed herein are embodiments of soft magnetic alloy embodiments for use in additive manufacturing and structures fabricated from such alloys. In some embodiments, the fabricated structures comprise a continuous thin wall (or plurality thereof) having a geometry that promotes reduced eddy current losses and other performance enhancements. In some embodiments, the fabricated structures are used to make components, such as transformer cores and/or electric motors.