Stator Winding Frame Guide Portion for Insulator Wedge Positioning
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Solution Overview
Problem
In concentrated winding motors, displacement of the insulator wedge between the winding and the outer core can lead to insulation failure due to frictional forces, making it difficult to insert the wedge and maintain stable insulation between the winding and the stator core.
Innovation Solution
The stator design incorporates a guide portion and an abutment portion on the winding frame to facilitate easy insertion and reduce lateral displacement of the wedge, ensuring stable insulation between the stator core and the winding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wedge is inserted between the winding and the outer core to ensure insulation, then insulation reliability is improved, but the wedge position is unstable due to frictional forces causing displacement
Solution Approach 1:
The guide portion and abutment portion act as intermediary structures that mediate between the wedge and the stator core. The guide portion directs the wedge during insertion, while the abutment portion provides a stopping point, together forming a positioning mechanism that prevents displacement caused by frictional forces.
Solution Approach 2:
The guide portion and abutment portion are pre-formed on the winding frame before the wedge insertion process. These structures prepare the insertion path and positioning points in advance, ensuring that the wedge is correctly positioned during insertion and remains stable during operation.
2Ease of operation
If the clearance between the outer core and the winding is expanded to facilitate wedge insertion, then ease of operation is improved, but insulation stability deteriorates
Solution Approach 1:
Instead of increasing the radial clearance between the outer core and winding, the solution introduces guide and abutment portions that create a new dimensional constraint along the axial direction. This allows the wedge to be inserted easily through the guide portion while the abutment portion maintains proper insulation clearance.
3Stability of the object's composition
If frictional force between the wedge and outer core is increased to prevent displacement, then wedge position stability is improved, but insertion difficulty increases
Solution Approach 1:
The positioning function is segmented into two distinct components: the guide portion that facilitates insertion and the abutment portion that prevents displacement. This segmentation allows the wedge to be easily inserted through the guide portion without requiring high friction, while the abutment portion provides the necessary positioning stability.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A stator (1) includes a stator core (5), a winding frame (11) wound with a winding (12), and an insulator (33). The stator core (5) includes a yoke (21), which is an outer core, and a plurality of tooth portions (22), which are inner cores surrounded by the outer core. The winding frame (11) covers the inner core. The insulator (33) is disposed between the winding (12) and the outer core. The winding frame (11) is provided with a guide portion (31) that guides the insertion of the insulator (33) between the winding (12) and the outer core. The stator (1) can reduce the displacement of the position of the insulator (33) and ensure stable insulation between the stator core (5) and the winding (12).