Stator Slot Dividers for Winding Isolation and Coolant Channels
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Solution Overview
Problem
Existing stator assemblies face challenges in controlling the position of stator windings, which can lead to degradation of wire insulation due to touching, resulting in shorting and overheating, and arranging effective cooling channels around the windings is difficult.
Innovation Solution
A stator assembly with radially projecting teeth and slots, featuring dividers that separate stator windings into cavities, and spacers that define coolant channels, along with end cheeks to secure the dividers and windings, preventing contact and facilitating efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stator windings are placed in slots without dividers, then the device complexity is reduced, but the windings spread out and touch causing insulation degradation
Solution Approach 1:
The slot is divided into multiple cavities using dividers, with each cavity holding a separate winding. This segmentation prevents windings from spreading and touching, maintaining insulation integrity while adding structured organization to the stator assembly.
2Temperature
If cooling channels are arranged around stator windings, then cooling efficiency is improved, but the device complexity increases
Solution Approach 1:
Cooling channels are integrated into the dividers that separate windings in the radial dimension. This allows cooling fluid to flow through channels formed by the dividers, providing effective cooling without requiring separate cooling structures, thus improving cooling efficiency while minimizing additional complexity.
3Manufacturing precision
If dividers are added to separate windings, then winding position control is improved, but manufacturing complexity increases
Solution Approach 1:
Dividers are pre-positioned in the slots before windings are inserted, establishing predetermined cavities that guide winding placement. This preliminary action ensures precise winding position control during assembly while simplifying the manufacturing process by providing a structured framework for winding insertion.
Data Source
AI summary
A stator assembly for an electrical machine extends azimuthally around an axis. The assembly includes: a plurality of stator teeth projecting radially from a circumference of the stator assembly, wherein the teeth are spaced azimuthally from each other and extend along a direction parallel to the axis of the stator assembly; a plurality of slots defined by azimuthal spacing of the stator teeth, wherein the plurality of slots extends along a direction parallel to the axis of the stator assembly, wherein the slots are arranged to receive a plurality of stator windings; and one or more dividers positioned within the plurality of slots, wherein the dividers define a plurality of cavities for receiving the plurality of stator windings.