Additive Ferromagnetic Laminates with Ceramic Insulation
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Solution Overview
Problem
Conventional additive manufacturing technologies face challenges in producing magnetic laminations due to difficulties in creating the insulating layer between magnetic sheets, limiting machine operating temperature and complexity of manufacturing complex topologies.
Innovation Solution
An additive manufacturing process that forms laminated ferromagnetic components by depositing and sintering conductive materials, with a secondary material treated to create an insulative layer, enabling the formation of complex geometries and high-temperature operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polymeric dielectric material is used as insulator between lamination sheets, then insulation is achieved, but machine operating temperature is limited to no greater than 300° C
Solution Approach 1:
The patent changes the material parameter from polymeric dielectric to ceramic material, which fundamentally alters the temperature tolerance parameter. Ceramic materials inherently withstand higher temperatures (above 300°C) while maintaining insulation properties, thus resolving the contradiction between temperature capability and insulation reliability.
Solution Approach 2:
The invention uses composite ceramic materials that combine electrical insulation properties with high-temperature resistance. These composite ceramic insulators integrate multiple functional properties (insulation + thermal stability) into a single material system, enabling both reliable insulation and high-temperature operation.
2Adaptability or versatility
If conventional additive manufacturing is used to manufacture ferromagnetic laminations, then manufacturing simplicity is maintained, but complex topologies are difficult to manufacture
Solution Approach 1:
The manufacturing process is segmented into distinct operational stages: depositing conductive material layers, depositing insulator material layers, and selective removal of insulator material. This segmentation enables the creation of complex internal topologies and cooling channels that would be impossible with conventional monolithic manufacturing, while keeping each individual step relatively simple and controllable.
Solution Approach 2:
The patent utilizes porous or removable insulator material layers that can be selectively eliminated to create internal voids, channels, and complex geometries. This approach allows complex topologies to be manufactured by first building them with temporary support structures (insulator layers) and then removing those structures to reveal the desired complex internal architecture.
3Weight of moving object
If conventional manufacturing methods are used for laminated cores, then manufacturing simplicity is maintained, but weight reduction and power density improvement are limited
Solution Approach 1:
The patent merges multiple manufacturing operations into a single additive manufacturing process. The laminated structure with alternating conductive and insulator layers is built in one continuous process, eliminating the need for separate stacking, aligning, and bonding operations required by conventional methods. This integration enables weight optimization through precise material placement while maintaining manufacturing simplicity.
Solution Approach 2:
The invention changes the manufacturing approach from subtractive/conventional assembly to additive manufacturing, fundamentally altering the process parameters. This enables precise control over material distribution, layer thickness, and internal geometry, allowing for weight reduction through optimized material usage and elimination of unnecessary material, while the automated additive process maintains ease of manufacture.
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
Enables the fabrication of laminated electromagnetic devices with improved thermal and mechanical performance, reduced core weight, and higher power density by allowing for complex geometries and integral cooling channels.
Implementation Method 1
forming a first lamina of a first conductive material... forming, on the first insulative layer, a second lamina of a first conductive material
Data Source
AI summary
A method of making a component of an electric machine using an additive manufacturing process is disclosed. The method includes forming a first lamina of a conductive material, building a first layer of a second material on a first surface of the first lamina, treating the second material on the first surface of the first lamina to define a first insulative layer, and building on the first insulative layer a second lamina of a conductive material. The steps can be repeated iteratively until a desired thickness or number of layers is reached.