Stator Winding Space Factor via Hook Extraction
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Solution Overview
Problem
The existing stator design for rotary electric machines faces challenges in increasing the space factor of the winding portion due to the restrictive presence of the connecting wire hook within the extended slot space, which limits the operational range of the nozzle during winding conductor installation.
Innovation Solution
The connecting wire hook is strategically positioned outside the third extended space, allowing the nozzle to advance further and wind the conductor closer to the annular yoke, with additional hooks placed in pairs to sandwich the third extended space and facilitate engagement, thereby increasing the space factor of the winding portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connecting wire hook is disposed within the extended slot space, then the connecting wire can be engaged, but the operative range of the nozzle is restricted and the space factor of the winding portion cannot be increased
Solution Approach 1:
The slot insulator is divided into two separate insulating resin pieces: a first insulating piece with the connecting wire hook, and a second insulating piece without the hook. This segmentation allows the nozzle to access the slot opening space freely for winding operations while the connecting wire hook remains positioned on the first insulating piece for engagement purposes.
Solution Approach 2:
The connecting wire hook is extracted from the extended slot space and repositioned on the first insulating piece that covers the slot opening space. This extraction removes the obstacle from the nozzle's operative range while maintaining the hook's functionality for connecting wire engagement.
2Volume of moving object
If the connecting wire hook is disposed on the end face of the yoke, then the space factor may be increased, but the diameter of the slot insulator becomes too small in smaller rotary electric machines
Solution Approach 1:
Instead of positioning the connecting wire hook on the end face of the yoke (horizontal dimension), the hook is positioned on the first insulating piece that extends into the slot opening space (vertical/depth dimension). This dimensional change allows the hook to be accessible while maintaining adequate slot insulator diameter for small machines.
3Volume of moving object
If the nozzle needs to reach deeper into the slot, then the space factor increases, but the connecting wire hook within the extended slot space blocks the nozzle's path
Solution Approach 1:
The connecting wire hook is taken out from the extended slot space and relocated to the first insulating piece. This removal clears the nozzle's path, allowing it to advance deeper into the slot for winding conductors around the pole column while the hook remains available for connecting wire engagement.
Data Source
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AI summary
A pair of connecting wire hooks are disposed on both sides of a nozzle receiving groove in an extended slot space (a first extended space) to sandwich an extended portion of an extended virtual space (a third extended space). In this configuration, the pair of connecting wire hooks are not located within the third extended space. Thus, in the stator for rotary electric machine, the space factor of the winding portion may be increased in a situation where the connecting wire hook is disposed within the first extended space.