Delta-Wound Stator Layout for Crossover Wire Insulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The delta connection system in three-phase rotating electrical machines faces challenges in assembly and insulation due to overlapping crossover wires, which complicates wiring and increases thickness, making it difficult to meet device downsizing demands and prone to insulation failure.
Innovation Solution
The winding direction of the second phase coil is reversed, with crossover wires for the first and third phase coils arranged on one side and the second phase coil's crossover wire on the opposite side, reducing interference and maintaining insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all three-phase coils are wound in the same direction with crossover wires arranged on the same surface, then the wiring structure is simple and consistent, but the crossover wires overlap densely increasing thickness and making assembly difficult
Solution Approach 1:
The patent applies dimensionality change by arranging crossover wires on different surfaces (first surface and second surface) of the stator instead of all on the same surface. This spatial redistribution reduces overlapping and density at any single location, thereby reducing the effective thickness and improving assembly ease while maintaining wiring structure simplicity
2Ease of manufacture
If all three-phase coils are wound in the same direction, then the winding process is consistent and simple, but the contact points are physically separated making assembly difficult and insulation hard to maintain
Solution Approach 1:
The patent applies inversion by winding the second phase coil in the reverse direction compared to the first and third phase coils. This reversal causes the contact points (A1-C6, A6-B1, B6-C1) to converge at the same location on the stator surface, transforming the previously separated contact points into a clustered arrangement that facilitates assembly and insulation maintenance
3Device complexity
If crossover wires are arranged densely together on the same surface, then the wiring structure is compact, but the location increases thickness and requires adhesive impregnation due to unstable floating
Solution Approach 1:
The patent distributes crossover wires across two different surfaces (first and second surfaces) of the stator rather than concentrating them on one surface. This dimensional separation reduces the density of wires at any single location, eliminating the need for adhesive impregnation and reducing the risk of insulation failure due to unstable floating
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 facilitates easy assembly and maintains high insulation for copper wires, reducing the risk of damage and enabling efficient wiring without the need for adhesive impregnation.
Implementation Method 1
a rotor having permanent magnets arranged to have different magnetism along the circumference
Implementation Method 2
permanent magnets alternately arranged along the circumference for different SN magnetism
Data Source
AI summary
A rotating electrical machine may include a stator and a rotor. The stator may include a plurality of iron cores and a plurality of windings. The plurality of windings may include a first phase winding, a second phase winding, and a third phase winding connected in a delta connection. The first phase winding, the second phase winding, and the third phase winding may each be connected in series with a respective crossover wire. The first and third phase windings may be wound in a first winding direction. The second phase winding may be wound in a second winding direction. A first crossover wire connecting the first phase winding and/or a third crossover wire connecting the third phase winding may be arranged on a first side of the stator. A second crossover wire connecting the second phase winding may be arranged on a second side of the stator.