Bus Ring Unit Radial Projections for Compact Stator Connection
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Solution Overview
Problem
Conventional bus ring units for electric motors have a large size in both the axial and radial directions, and require a dedicated holder that increases costs and size, while also complicating the connection process of stator coils.
Innovation Solution
A bus ring unit design featuring single-phase and neutral-point bus rings with rounded regions and connecting projections that are coaxial with the stator, allowing for reduced size and facilitating easier connection of stator coil ends by positioning these projections in specific axial and radial positions, enabling a more compact and efficient electrical connection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single-phase bus rings are displaced in the axial direction to facilitate connecting work, then ease of operation is improved, but the size in the axial direction increases
Solution Approach 1:
The patent transitions from axial displacement to radial displacement of bus rings. Instead of positioning bus rings at different axial levels, the invention places them at different radial distances from the stator center, with connecting terminals extending radially outward. This dimensional change resolves the contradiction by achieving ease of connection through radial arrangement while maintaining compact axial dimensions.
2Stability of the object's composition
If a dedicated holder is used to retain bus rings, then stability is improved, but device complexity and size increase
Solution Approach 1:
The patent extracts and eliminates the dedicated holder component entirely. Instead of using a separate holder to retain bus rings, the invention allows bus rings to be positioned and retained through their own structural features and spatial arrangement, with connecting terminals that extend directly to facilitate connection work without additional retention mechanisms.
Solution Approach 2:
The bus rings themselves serve multiple functions: they provide electrical connection, structural retention, and positioning features. The connecting terminals extend radially to facilitate connection while the bus rings maintain their own stability without requiring a dedicated holder, making the system more universal and less complex.
3Volume of moving object
If multiple bus rings are positioned close together to reduce size, then volume is reduced, but interference between bus rings occurs
Solution Approach 1:
The patent employs asymmetric radial positioning of different phase bus rings at different distances from the stator center. Each phase bus ring is positioned at a specific radial distance with connecting terminals extending radially outward at different circumferential positions. This asymmetric arrangement allows compact volume while preventing interference between bus rings through proper spatial separation.
Data Source
AI summary
In the present invention, single-phase bus rings have single-phase-side rounded regions that are disposed at intervals on a circle smaller than a neutral-point bus ring and are positioned so that its circumferential edges are displaced in the circumferential direction relative to neutral-point-side connecting regions of the neutral-point bus ring and are positioned in a second axial position that is farther from a stator than a first axial position on which the neutral-point bus ring is partially positioned, and a pair of single-phase-side projections that extend radially outward from the circumferential edges of adjacent single-phase-side rounded regions beyond portions of the neutral-point-side rounded regions positioned in the first axial position, and are connected to each other at distal ends.