Stator Winding with Parallel Branches and Standardized Conductors
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Solution Overview
Problem
The existing stators for electrical machines with multi-phase plug-in windings require a large number of different conductor elements, increasing manufacturing costs and space requirements, and often necessitate special connectors that protrude radially, complicating the geometric design and interconnection.
Innovation Solution
The stator design features two parallel winding branches with first ends in the same slot, running in opposite circumferential directions, and a repeating sequence of conductor elements with angled ends, eliminating the need for special connectors by arranging second ends in different slots and forming a common star point, which simplifies the geometric design and reduces space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional multiphase windings with special connectors are used, then the winding can be assembled, but the number of different conductor elements increases and manufacturing costs increase
Solution Approach 1:
The patent applies universality by designing conductor elements that can serve multiple positions and functions within the winding. Standard conductor elements are configured to be reusable across different slots and phases, eliminating the need for special connectors. Each conductor element is designed with leg sections and connecting sections that can be positioned in various slots while maintaining electrical connectivity, thus reducing the variety of different conductor elements required and lowering manufacturing costs.
Solution Approach 2:
The patent applies segmentation by dividing the winding into parallel branches with standardized conductor elements. Each conductor element is segmented into leg sections and connecting sections that can be independently positioned. This segmentation allows for modular assembly where identical conductor elements can be reused across different positions, reducing the need for specialized connectors and simplifying manufacturing.
2Volume of moving object
If conventional windings with special connectors are used, then the winding can be assembled, but the installation space required increases
Solution Approach 1:
The patent applies merging by integrating the functions of multiple conductor elements into a unified winding structure with parallel branches. The first ends of all winding branches are arranged geometrically close together, merging the terminal regions into a compact configuration. This merging eliminates the need for protruding special connectors and reduces the overall installation space required for the winding assembly.
Solution Approach 2:
The patent applies dimensionality change by arranging conductor elements in a three-dimensional slot structure with specific positioning. The leg sections are positioned at different heights within slots, and connecting sections link them in a compact configuration. This spatial arrangement in multiple dimensions allows the winding to fit within a smaller overall volume while maintaining electrical connectivity without requiring special connectors.
3Ease of operation
If first ends of winding branches are arranged close together, then contact with power electronics is simplified, but the winding structure becomes more complex
Solution Approach 1:
The patent applies universality by using standardized conductor elements with identical leg sections and connecting sections throughout the winding. These universal conductor elements are configured to naturally position the first ends of all winding branches close together. The same conductor element design serves multiple positions and phases, achieving compact terminal arrangement without requiring complex specialized structures.
Solution Approach 2:
The patent applies asymmetry in the positioning of leg sections within slots, with specific conductor elements positioned at different heights (upper, lower, middle positions). This asymmetric arrangement within the standardized conductor element design allows the first ends to converge geometrically close together while maintaining proper electrical connectivity, achieving compact terminal arrangement without increasing overall structural complexity.
Data Source
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AI summary
Stators for an electrical machine which are fitted with a polyphase winding which is in the form of a plug-type winding and the phase windings of which run through grooves of the stator and comprise a plurality of different conductor elements are already known. According to the invention, two parallel winding branches (3.1, 3.2) are provided per phase winding (3), respective first ends of which winding branches are provided in the same groove and which winding branches extend from there in a loop shape in opposite peripheral directions to respective second ends; one first end of the one winding branch being provided as a connection conductor element lying in the lowermost groove position and the other first end of the other winding branch being provided as the connection conductor element lying in the topmost groove position; in the parallel winding branches (7), a repeating sequence of one of the lower conductor elements (6), one or more middle conductor elements (7), one of the upper conductor elements (5), and one or more of the middle conductor elements (7), or the reverse, being provided; the lower conductor elements (5) each having leg sections (5.1) lying in the same groove position and the upper conductor elements (6) each having leg sections (6.1) lying in the same groove position; the step size of the lower conductor elements (5) and the step size of the upper conductor elements (6) being equal; the middle conductor elements (7) lying between the lowermost groove position and the uppermost groove position in the grooves (4) and each having a position jump of the value one from the one leg section (7.1) thereof to the other leg section (7.2) thereof and having the same step size as the upper and lower conductor elements (5, 6).