Stator Winding Head Layout for Reduced Overhang
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Solution Overview
Problem
In stators with shaped conductors of varying increments, achieving a suitable disposition that minimizes axial winding overhang and simplifies production while efficiently utilizing radial installation space is challenging.
Innovation Solution
The stator design incorporates a head portion with an offset portion that connects the inner and outer portions, allowing the outer portion of the third shaped conductor to extend radially further than others, utilizing radial space effectively and reducing winding overhang by using an offset portion with a greater radial extent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If shaped conductors with different increments are used, then the winding can accommodate varying groove spacing requirements, but the head portions become difficult to dispose in a compact manner
Solution Approach 1:
The patent introduces a radial dimension for the offset portion that connects inner and outer portions of head portions. By extending the offset portion radially outward, the design accommodates shaped conductors with different increments (S, S+1, S-1) while maintaining compact axial arrangement. This radial extension allows the head portions to be disposed in an organized manner despite the varying increments.
2Area of stationary object
If the outer portion of the third shaped conductor is extended radially further outward, then radial installation space is utilized more efficiently, but the structural complexity of the head portion increases
Solution Approach 1:
The patent applies local quality by making the offset portion of the third shaped conductor extend radially further outward than the offset portions of other shaped conductors. This localized radial extension efficiently utilizes the radial installation space without requiring a complete redesign of all head portions. The asymmetric radial extension is applied only where needed to accommodate the specific increment variation.
3Length of moving object
If head portions with different increments are arranged to minimize axial winding overhang, then the axial length is reduced, but the radial arrangement becomes more complex
Solution Approach 1:
The patent segments the head portion into distinct inner portion, offset portion, and outer portion. This segmentation allows each part to be independently arranged to optimize the axial winding overhang. The inner portion connects to the first leg portion, the offset portion provides radial extension, and the outer portion connects to the second leg portion. This segmented structure enables systematic arrangement of shaped conductors with different increments while minimizing axial overhang.
Data Source
AI summary
A stator for an electrical machine includes a stator core in which a plurality of grooves distributed in a circumferential direction are formed and which has two opposite end faces, and a stator winding having a plurality of shaped conductors. The shaped conductors each have a first leg portion, a second leg portion and a head portion connecting the leg portions to one of the end faces. The leg portions extend through different grooves and are spaced apart from one another by an increment of a number of grooves.