Stator Terminal Radial Overlap Design for Compact Motor
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Solution Overview
Problem
Existing terminal designs for stators of three-phase motors require a large amount of space due to overlapping bus rings, leading to increased dimensions.
Innovation Solution
The terminal design incorporates arc-shaped extending portions for each phase that overlap each other in a radial direction, allowing for side-by-side arrangement, reducing the overall size by minimizing overlapping areas between extending portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bus rings of different sizes are arranged in a concentric pattern, then all bus rings can be electrically connected to coil wires of different phases, but the terminal member requires larger space and has greater dimensions
Solution Approach 1:
The patent transitions from a radial/concentric arrangement to an arc-shaped arrangement where extending portions overlap in the radial direction at different circumferential positions. This dimensional reorganization allows multiple extending portions to occupy the same radial space at different angular positions, reducing the overall terminal size while maintaining electrical connectivity to all three phases
2Area of stationary object
If multiple extending portions are arranged to overlap in the radial direction, then the terminal size is reduced, but the arrangement complexity increases
Solution Approach 1:
The terminal is segmented into three distinct extending portions (first, second, and third) corresponding to different phases, each with its own welded portions. This segmentation allows each portion to be independently arranged in an arc shape, simplifying the overall design while achieving compact radial overlap. The segmentation also facilitates modular manufacturing and assembly
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the size of the terminal by allowing for a smaller radial space requirement without compromising the secure attachment and electrical connectivity of the coil wires.
Implementation Method 1
a plurality of first welded portions welded to a coil wire of a first phase; a plurality of second welded portions welded to a coil wire of a second phase; a plurality of third welded portions welded to a coil wire of a third phase
Data Source
AI summary
The first extending portion 26 overlaps the second extending portion 27 in a radial direction at one part in the circumferential direction and overlaps the third extending portion 28 in the radial direction at another part in the circumferential direction. The second extending portion 27 overlaps the first extending portion 26 in the radial direction at one part in the circumferential direction and overlaps the third extending portion 28 in the radial direction at another part in the circumferential direction. The third extending portion 28 overlaps the first extending portion 26 in the radial direction at one part in the circumferential direction and overlaps the second extending portion 27 in the radial direction at another part in the circumferential direction.