Segmented Stator Interlock Geometry for Motor Roundness Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional motors face issues with insufficient engagement between stator segments, leading to roundness deterioration and difficulty in assembly due to segment movement and deviation.
Innovation Solution
The stator segments are coupled via engaging parts with protruding and recessed features that intersect in specific planes, ensuring stable engagement and improved roundness by forming an acute angle shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If segments are combined in an annular shape with engaging parts merely in contact, then assembly is simple, but engagement between segments is insufficient causing segment movement and roundness deterioration
Solution Approach 1:
The engaging parts transition from simple contact in one dimension to multi-dimensional engagement through protruding parts extending in the radial direction and intersecting planes creating engagement in both radial and circumferential dimensions. This dimensional expansion prevents segment movement while maintaining assembly feasibility.
Solution Approach 2:
The engaging parts feature asymmetric geometry with protruding parts having different plane orientations (first plane and third plane intersecting at acute angles). This asymmetric design creates directional engagement that prevents both radial and circumferential movement of segments, improving roundness without complicating assembly.
2Device complexity
If engaging parts have simple contact structure, then device complexity is low, but segment movement outward or inward occurs causing roundness deterioration
Solution Approach 1:
The engaging parts incorporate radial extension through protruding parts that extend in the radial direction, adding a dimensional constraint that prevents segment movement. This radial dimension engagement maintains structural simplicity while effectively preventing roundness deterioration.
Solution Approach 2:
The stator segments are designed with arch-shaped curved structures that fit together in an annular configuration. The curvature of the segments combined with the protruding engaging parts creates a geometric interlock that maintains roundness while keeping the overall structure relatively simple.
3Adaptability or versatility
If segments are assembled with deviation in assembly positions, then assembly flexibility is high, but assembling segments to housing becomes difficult
Solution Approach 1:
The protruding parts and recesses are pre-configured with specific plane orientations and geometric relationships before assembly. This preliminary configuration of the engaging parts allows segments to be positioned flexibly during assembly while ensuring that once engaged, the segments lock into the correct positions, preventing subsequent assembly difficulties.
Solution Approach 2:
The asymmetric geometry of the engaging parts with intersecting planes at acute angles creates a self-aligning mechanism. This allows assembly position flexibility during the assembly process while ensuring proper alignment and fit when the segments are engaged, preventing assembly difficulties with the housing.
Data Source
AI summary
A motor includes a rotor and a stator. The stator includes a plurality of segments coupled via engaging parts. The segment includes a plurality of pieces coupled via a coupling part. The plurality of pieces are disposed in an arc shape. The plurality of segments are disposed in an annular shape. The engaging part has two protruding parts projecting to a circumferential direction side and a recess part provided between the two protruding parts. Among the two segments disposed adjacently, the protruding part of one segment is engaged with the recess part of the other segment, and the recess part of the one segment is engaged with the protruding part of the other segment. The two protruding parts of the one segment and the other segment have top parts, and the protruding part of the one segment and the recess part of the other segment have a first plane and a third plane opposing one another. The first plane and the third plane extend in a radial direction and a circumferential direction of the stator, and extend in directions intersecting one another toward the top part.