Rotary Electric Machine Insulator Material Filled Between Conductive Bodies
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Solution Overview
Problem
Conventional coil guides in rotational electric machines fail to ensure sufficient electrical insulation between the stator iron core and the electric conductive body, leading to potential damage and inadequate insulation.
Innovation Solution
A rotational electric machine design featuring a stator iron core with slots, segment conductive bodies, and a coil guide that includes a slot insertion portion and separation portions to prevent contact and ensure insulation, along with an insulation material filling to enhance electrical insulation and productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional coil guide is used to install the electric conductive body in the stator iron core, then the productivity is improved, but the electrical insulation between the stator iron core and the electric conductive body deteriorates
Solution Approach 1:
The patent introduces an intermediary substance (insulation material such as resin or varnish) that fills the gap between the stator iron core and the electric conductive body. This intermediary layer prevents direct contact while allowing the coil guide to remain in place, thus maintaining both productivity and electrical insulation. The insulation material acts as a mediator that resolves the conflict between the need for efficient assembly and reliable electrical isolation.
2Ease of manufacture
If the electric conductive body is inserted into the stator iron core without additional insulation measures, then the manufacturing process is simplified, but the electric conductive body may come into contact with the stator iron core causing damage and insufficient insulation
Solution Approach 1:
The patent employs a self-service approach where the insulation material is applied in a way that automatically ensures protection during the assembly process. The insulation material (resin or varnish) is applied to the stator iron core or the electric conductive body before insertion, creating a self-protecting structure that prevents contact damage and ensures insulation without requiring additional manual intervention or complex assembly steps.
Data Source
AI summary
A rotational electric machine achieving both of productivity and insulation property is provided. A rotational electric machine includes an iron core having a plurality of slots, and a plurality of segment conductive bodies arranged in the slots, wherein the iron core includes a coil guide arranged at, at least, one of opening portions of the slots, and the coil guide includes a slot insertion portion located between the slot and the segment conductive body and at least one separation portion located between the segment conductive bodies, and the slot insertion portion and the separation portion are arranged in the slot together with the segment conductive body.