Stator Winding End Positioning for Vibration Resistance
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Solution Overview
Problem
In concentrated winding stators with a single winding pattern, the varying lengths of wiring from winding ends to connection rings across different phases lead to potential disconnection due to vibration, as the radial positions of connection rings differ, causing inconsistent wire lengths.
Innovation Solution
The stator design features multiple phases with radially adjusted winding end positions and equal wire diameters and windings, ensuring the winding ends are closest to their respective connection rings, thereby shortening wire lengths and preventing disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single winding pattern is used for all phases, then the winding process is simplified and coil space factor is improved, but the wiring length from winding ends to connection rings varies by phase leading to potential disconnection
Solution Approach 1:
The patent applies local quality by assigning different winding patterns to different phases (U, V, W phases) based on their specific connection ring positions. Each phase has a winding pattern optimized for its local geometry, ensuring that winding ends are positioned to minimize wiring length to the respective connection rings. This resolves the contradiction by maintaining manufacturing simplicity through standardized winding techniques while improving reliability through phase-specific pattern optimization.
2Reliability
If wiring length from winding ends to connection rings is reduced, then disconnection due to vibration is prevented, but the winding pattern becomes more complex
Solution Approach 1:
The patent changes the winding pattern parameters (number of turns, winding direction, layer configuration) for each phase to optimize the position of winding ends relative to their respective connection rings. By adjusting these parameters, the wiring length is minimized for each phase, preventing disconnection due to vibration. The complexity increase is managed by systematically varying only the necessary parameters while maintaining overall winding structure consistency.
Data Source
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Figure 2(a)~2(c)
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AI summary
To prevent disconnection of the stator of the rotating electric machine. A stator includes: multi-phase stator coils each having a salient pole concentrated winding; a stator iron core formed with a plurality of teeth around which the multi-phase stator coils are wound; and a plurality of connection rings configured to connect each of the multi-phase stator coils, wherein a winding end position of each of the multi-phase stator coils is disposed closest to the corresponding connection ring among the plurality of connection rings.