Slotless Armature Winding Assembly With Interference Prevention
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Solution Overview
Problem
Existing rotating electric machines face challenges in assembling armature windings, particularly in slot-less structures where windings are not wound around teeth, leading to difficulties in ensuring insulation and preventing interference between adjacent windings.
Innovation Solution
The armature winding is configured with multiple phases, each comprising partial windings with intermediate conductor portions separated by a predetermined interval, connected by crossover portions, and featuring an interference prevention portion extending radially to prevent circumferential interference, with insulation layers interposed between conductor portions and a back yoke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If armature windings are assembled in slot-less structures without teeth, then the rotating electric machine achieves a simplified structure and improved performance, but difficulties arise in ensuring insulation and preventing interference between adjacent windings
Solution Approach 1:
An interference prevention portion is introduced as an intermediary element between adjacent armature windings. This portion extends in the radial direction and physically separates the windings, preventing interference while maintaining the slot-less structure's simplicity. The intermediary element resolves the contradiction by providing the necessary insulation and separation without requiring traditional slots or teeth.
2Adaptability or versatility
If armature windings are assembled in slot-less structures without teeth, then the rotating electric machine achieves a simplified structure and improved performance, but difficulties arise in preventing interference between adjacent windings
Solution Approach 1:
The interference prevention portion serves as a mediator that physically separates adjacent armature windings in the radial direction. This intermediary structure prevents harmful interference between windings while preserving the simplified slot-less design, eliminating the need for traditional teeth or slots that would complicate the structure.
3Reliability
If insulation layers are interposed between intermediate conductor portions and back yoke, then insulation reliability is improved, but assembly complexity increases
Solution Approach 1:
The interference prevention portion and insulation layer are combined into a single integrated structure. This merging reduces assembly complexity by eliminating separate components while maintaining both the interference prevention function and the insulation reliability. The unified structure simplifies the assembly process compared to using separate interference prevention and insulation elements.
Data Source
AI summary
An armature includes an armature winding of multiple phases having phase windings, for each phase, that includes a plurality of partial windings, and a base member that includes a circular cylindrical back yoke. The partial winding includes a pair of intermediate conductor portions and crossover portions that connect the intermediate conductor portions in an annular shape. A conductor is wound in multiple layers in the intermediate conductor portions and the crossover portions. An interference prevention portion extends in a radial direction. The intermediate conductor portions are arrayed in a predetermined order in the circumferential direction, by one of the intermediate conductor portions of a first phase being arranged between the intermediate conductor portions of the partial winding of a second phase. The partial windings are assembled to the back yoke in a state in which an insulation layer is interposed between the intermediate conductor portion and the back yoke.