Stator Core Segments With Protrusions And Recesses For Coil Protection
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Solution Overview
Problem
The assembly of stator core segments into the stator coil in rotary electric machines can cause damage to the stator coil due to the overlapping and movement of yoke pieces, leading to potential mechanical stress and damage during the assembly process.
Innovation Solution
The stator core assembly is designed with core segments having circumferential projections and recesses that fit together, allowing for precise alignment and contact without overlapping, which reduces the risk of mechanical stress and damage during assembly, and meets specific geometric equations to ensure proper fitment and assembly without causing damage to the stator coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If yoke pieces are moved toward the stator coil with overlapping sides pressed in the axial direction, then the stator core assembly can be assembled, but the yoke pieces may swing in the circumferential direction causing teeth to hit and damage the stator coil
Solution Approach 1:
The invention applies preliminary action by pre-forming the stator core assembly from multiple core segments before assembling it to the stator coil. The core segments are prepared with specific geometric features (protrusions and recesses) that enable controlled assembly without requiring axial pressing that could cause swinging and damage to the coil.
Solution Approach 2:
The stator core is divided into multiple core segments that are assembled together to form the complete stator core assembly. Each core segment has protrusions and recesses that enable precise positioning and stable assembly, eliminating the need to press overlapping sides axially and preventing circumferential swinging during assembly.
2Strength
If core segments are assembled with protrusions and recesses fitting together, then mechanical strength and alignment are improved, but the geometric design becomes more complex
Solution Approach 1:
The stator core is segmented into multiple core segments, each equipped with protrusions and recesses. These geometric features provide mechanical interlocking that enhances the strength and stability of the assembly while maintaining relatively simple individual segment designs that are easier to manufacture separately.
Solution Approach 2:
Multiple core segments with protrusion-recess interfaces are combined to form the complete stator core assembly. The merging of these segments creates a structurally stronger assembly with improved alignment, while the modular approach allows each segment to be designed and manufactured independently with simpler geometry.
Data Source
AI summary
In a stator, when a number of a plurality of core segments circumferentially arranged is represented as n, a length of a maximum projecting portion of a circumferential projection of each of the plurality of core segments from one of the first and second radial sides thereof is represented as p, a radial length of a maximum projecting portion of the circumferential projection of each of the plurality of core segments from a circumferentially extended line from the bottom of the slot is represented as q, and a length of the slot with respect to the bottom thereof in a radial direction of the stator core assembly is represented as t, the number n, the length p, the length q, and the length t meet the following equation:0<npπ-q<t.