Stator Assembly Cooling Ring for Axial Coolant Distribution
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Solution Overview
Problem
Existing cooling technologies for electric machines, such as electric motors and generators, are inadequate in efficiently distributing coolant fluid to improve cooling efficiency and performance.
Innovation Solution
A stator assembly with integrated coolant fluid channels and distribution ring elements that allow coolant fluid to flow in different directions along the center axis, featuring cavities, through holes, and ring element channels to enhance cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cooling technologies are used for electric machines, then the structure is simple, but the cooling efficiency is insufficient
Solution Approach 1:
The cooling system is segmented into multiple functional components: a distribution ring with multiple cavities, through-holes, and channels; a stator with integrated coolant channels; and a rotor with cooling structures. This segmentation allows coolant to flow through multiple pathways simultaneously, improving cooling efficiency without requiring a single complex system
Solution Approach 2:
The distribution ring is positioned within the stator assembly, which itself is nested within the rotor structure. The coolant channels are integrated within the stator teeth and yoke. This nested arrangement allows multiple cooling functions to be compactly integrated, improving cooling efficiency while maintaining a space-efficient design
2Temperature
If coolant fluid channels are integrated in the stator, then cooling effectiveness improves, but manufacturing complexity increases
Solution Approach 1:
The coolant channels are merged directly into the stator structure during manufacturing, eliminating the need for separate channel installations. The distribution ring is also integrated with the stator assembly. This merging reduces the number of assembly steps and improves manufacturing efficiency while maintaining effective cooling channels
3Productivity
If multiple coolant distribution paths are created, then cooling efficiency increases, but device complexity increases
Solution Approach 1:
The distribution ring serves multiple functions simultaneously: it distributes coolant to the stator through cavities and through-holes, directs coolant through the rotor, and provides structural support. This multi-functionality allows multiple cooling paths to be achieved without proportionally increasing system complexity
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
Improves cooling effectiveness, leading to increased power and torque output in electric machines by efficiently directing coolant fluid through the stator assembly.
Implementation Method 1
coolant fluid channels integrated in the stator, distributed in a circumferential direction around the stator and extending between the two end portions with openings at each end portion
Implementation Method 2
coolant fluid distribution ring element... improving the cooling effect of the stator
Data Source
AI summary
A stator assembly for an electric machine, the stator assembly comprises a stator which extends between two end portions along a center axis of the stator assembly, corresponding to a rotational axis of the electric machine, the stator comprising a plurality of coolant fluid channels integrated in the stator, distributed in a circumferential direction around the stator and extending between the two end portions with openings at each end portion. The stator assembly further comprising a first coolant fluid distribution ring element provided at one of the end portions.