Segment Coil Traceability Using Bare Coil-End Marking
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Solution Overview
Problem
The identification information on segment coils causes quality deterioration due to the presence of an insulating layer, which is prone to damage during the manufacturing process.
Innovation Solution
A traceability management method and device that reads information from parts on coil ends without an insulating layer, managing the traceability of segment coils inserted into slots, and vanishing the information-indicating parts through welding, insulation coating, or resin encapsulation to prevent damage and quality deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If identification information is provided on the insulating layer of the segment coil, then traceability management is enabled, but the insulating layer is prone to damage and quality deterioration occurs
Solution Approach 1:
The identification information is extracted from the insulating layer and relocated to the coil end portion, which has no insulating layer. This separation allows the insulating layer to maintain its protective function without being compromised by the presence of identification markings.
Solution Approach 2:
Instead of placing identification information on the insulating layer as conventionally done, the patent inverts the approach by placing it on the coil end portion without insulating layer, thereby protecting the insulating layer from damage while preserving traceability.
2Loss of information
If identification information is marked on the segment coil, then manufacturing traceability is achieved, but the segment coil quality is deteriorated
Solution Approach 1:
The identification information is extracted from the insulating layer and relocated to the coil end portion, which has no insulating layer. This separation allows the insulating layer to maintain its protective function without being compromised by the presence of identification markings.
Solution Approach 2:
The patent applies different properties to different parts of the segment coil: the insulating layer remains intact and undamaged, while the coil end portion without insulating layer bears the identification information. This local differentiation resolves the contradiction between traceability and quality.
3Loss of information
If information-indicating part is provided on the coil end with insulating layer, then traceability is managed, but damage to the information-indicating part occurs during joining
Solution Approach 1:
The information-indicating part is extracted from the insulating layer and placed on the coil end portion without insulating layer, preventing damage during the joining process where insulating layers are removed or damaged.
Solution Approach 2:
The identification information is placed on the coil end portion before the insulating layer is removed or damaged during joining, ensuring the information survives the manufacturing process intact.
Data Source
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AI summary
Provided is a traceability management method capable of managing traceability of a segment coil inserted into slots leading to the slots. The traceability management method for a stator of a rotating electrical machine in which coil ends 7a with no insulating layer 7c in segment coils 7 inserted into slots are joined together, includes reading information from information-indicating parts 11 being provided on the coil ends 7a and including the information involved in manufacturing of the segment coils 7, and performing management of traceability of the inserted segment coils 7 leading to the slots according to information involved in the slots and the information read in the reading step S2.