Additive Manufacturing of Electric Machine Stator and Rotor Assemblies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional methods for manufacturing electrical machinery, such as generators and motors, are inefficient and lack precision in assembling components like stators and rotors, leading to issues like eddy current losses and complex assembly processes.
Innovation Solution
The method involves additive manufacturing, specifically 3D printing, to create electrical machine components layer by layer, allowing for the integration of features like projections and varnishing to ensure precise assembly and reduced losses, using materials like iron-cobalt-vanadium alloys and incorporating cooling tubes for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional methods of stacking lamination sheets and winding coils are used, then assembly processes can be performed with conventional equipment, but the assembly process becomes complex and time-consuming with multiple discrete steps
Solution Approach 1:
The patent combines multiple discrete components (stator core, windings, end turns, slot liners) into a single integrated stator assembly that is printed as one continuous piece using additive manufacturing technology, eliminating the need for separate assembly steps for each component
Solution Approach 2:
The manufacturing process is segmented into distinct printable regions (core regions, winding regions, end turn regions) within the single stator assembly, allowing different functional zones to be created in one continuous printing process rather than requiring separate assembly operations
2Productivity
If traditional winding and assembly methods are used, then conventional manufacturing equipment can be utilized, but manufacturing time and production efficiency are reduced
Solution Approach 1:
The stator assembly is printed in advance as a complete integrated unit with all functional components (core, windings, end turns) already in their final positions, eliminating the need for time-consuming on-site assembly operations
Solution Approach 2:
The patent replaces traditional mechanical assembly processes (stacking, winding, inserting, sliding) with an additive manufacturing process that builds the entire stator assembly layer by layer in a single automated printing operation
3Loss of energy
If conventional manufacturing methods are used, then standard materials and processes can be applied, but eddy current losses increase due to imprecise assembly
Solution Approach 1:
The patent incorporates cooling tubes with channels printed directly into the stator assembly that can circulate coolant to manage heat and reduce eddy current losses, providing precise thermal control that is difficult to achieve with traditional assembly methods
Solution Approach 2:
The additive manufacturing process replaces imprecise mechanical assembly operations with automated layer-by-layer deposition that achieves higher precision in positioning components, reducing gaps and misalignments that cause eddy current losses
Data Source
AI summary
A method for manufacturing an electrical machine includes printing a stator core; printing a first part of a stator winding; coupling the first part of the stator winding to the stator core; printing a second part of the stator winding onto the first part of the stator winding to form a stator assembly; printing a first part of a rotor shaft; printing a rotor core onto the first part of the rotor shaft; printing a second part of the rotor shaft onto the rotor core; printing a first part of a rotor winding; coupling the first part of the rotor winding to the rotor core; and printing a second part of the rotor winding onto the first part of the rotor winding to form a rotor assembly.