Stator Coil Support Members for Creepage Insulation Distance
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Solution Overview
Problem
Existing rotating electric machines face reduced insulation reliability due to insufficient consideration of creepage insulation distance, leading to issues with insulation paper omission or tearing during coil insertion and unstable coil height.
Innovation Solution
A stator core is designed with storage spaces for segment coils on its inner circumference, supported by annular coil support members with through-holes at both ends, ensuring a consistent creepage insulation distance and improved insulation reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If insulation paper is omitted or torn during coil insertion, then productivity is improved, but insulation reliability deteriorates
Solution Approach 1:
The coil support member acts as an intermediary component between the stator core and the coil. It provides a structured interface with through-holes that guide coil insertion while maintaining insulation distance, eliminating the need for separate insulation paper and preventing coil damage during assembly
Solution Approach 2:
The coil support member is pre-installed on the stator core before coil insertion. This preliminary action establishes the insulation distance and structural framework in advance, ensuring that coils are properly positioned and insulated from the beginning of the assembly process
2Device complexity
If coil support members are not used, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The coil support member with through-holes is pre-installed on the stator core before coil insertion. This preliminary action establishes the insulation distance and structural framework in advance, ensuring that coils are properly positioned and insulated from the beginning of the assembly process
Solution Approach 2:
The coil support member transforms the physical parameters of the stator structure by introducing through-holes at specific positions and depths. This changes the geometric parameters (insulation distance, coil positioning height) and material parameters (structural rigidity, electrical insulation) to achieve consistent coil height and proper insulation
Data Source
AI summary
This object is to secure a creepage insulation distance and improve insulation reliability. A stator core is formed as a housing, and is configured such that storage spaces for storing a plurality of segment coils are formed on an inner circumferential side of the housing in an axial direction of the housing and a plurality of the storage spaces is formed at intervals on the inner circumferential side of the housing. A plurality of coil support members is formed as annular members, and supports the plurality of segment coils. The coil support members each include a plurality of through-holes for inserting the segment coils, which is openings connected to the storage spaces, are separately disposed at both ends of the stator core in the axial direction, and each cover the inner circumferential side of the end portion of the stator core in the axial direction.