Hollow Cup Winding Segmentation for Conductor Utilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional hollow cup motor windings fail to effectively utilize conductors away from the middle line, leading to a decline in motor power intensity, increased resistance, and deteriorated performance due to suboptimal distribution coefficients.
Innovation Solution
The implementation of N phases of windings, each comprising k (360/k/N)° coil units, which are connected as forward or backing coil assemblies based on the principle of maximum counter electromotive force, allowing for a triangular or star connection of three-phase windings with each coil unit being 60°, optimizing conductor utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional uniform winding distribution is used, then manufacturing simplicity is maintained, but conductor utilization is poor and distribution coefficient is high
Solution Approach 1:
The winding is segmented into multiple coil units with different distribution coefficients (kc1, kc2, kc3, etc.) rather than using a uniform distribution. Each coil unit is assigned a specific segment of the stator circumference, allowing optimized utilization of conductors in different regions while maintaining manufacturing feasibility through modular assembly.
Solution Approach 2:
Different regions of the stator winding are assigned different distribution coefficients tailored to local requirements. Coil units closer to the middle line have optimized parameters compared to those at the edges, creating local quality variations that maximize overall conductor utilization and reduce the average distribution coefficient.
2Device complexity
If tooth sockets in hollow cup are canceled, then structural simplicity is achieved, but distribution coefficient increases and motor performance deteriorates
Solution Approach 1:
The invention changes the electrical parameters of the coil units (distribution coefficients, connection patterns) to compensate for the absence of tooth sockets. By optimizing the k values and connection methods of individual coil units, the system achieves improved conductor utilization and reduced distribution coefficients without requiring the traditional tooth socket structure.
3Device complexity
If conductors away from middle line are not effectively utilized, then winding simplicity is maintained, but motor power intensity decreases and resistance increases
Solution Approach 1:
The winding is divided into multiple coil units with distinct segments, each optimized for its specific position. This segmentation allows conductors at all positions (including those away from the middle line) to be effectively utilized with appropriate distribution coefficients, thereby increasing motor power intensity without complicating the overall winding structure.
Solution Approach 2:
The invention introduces dynamic optimization parameters (variable distribution coefficients and connection patterns) that adapt to the position of conductors within the hollow cup. This allows the system to maximize power intensity by dynamically adjusting how conductors are utilized based on their location, rather than using a static uniform approach.
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 approach reduces distribution coefficients, enhances counter electromotive force, and improves motor performance by fully utilizing conductors, offering flexibility in coil numbers and connection modes to maximize electromotive force.
Implementation Method 1
The backing or forward connection of the k (360/k/N)° coil units is determined by the principle of the maximum counter electromotive force
Data Source
AI summary
The present invention relates to a hollow cup winding capable of reducing distribution coefficient, comprising N phases of windings, where each phase of the windings consists of k (360/k/N)° coil units and the k coil units constitute of backing coil assemblies and forward coil assemblies. Compared with the prior art, the present invention has the advantages of improving motor performance and of being highly universal.