Stator Insulator Structure to Prevent Insulating Paper Separation
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Solution Overview
Problem
The existing stator designs face challenges in maintaining the uniform positioning of insulating paper, which can lead to degradation of insulation performance and interference with rotor rotation, resulting in motor defects due to paper movement or separation, and also cause interference between coils wound around adjacent teeth.
Innovation Solution
The stator design incorporates a plurality of unit stators with insulators featuring guide protrusions and an insulating member with curved surfaces, where the insulating member is disposed between the coils and the guides to prevent movement and separation, and the last turn of the coil is fixed in a groove to avoid interference with adjacent teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating paper is disposed between coils after stator assembly, then insulation performance is improved, but uniform positioning becomes difficult and paper separation occurs
Solution Approach 1:
The insulating paper is pre-installed on the stator core teeth before coil winding, ensuring uniform positioning and preventing separation during subsequent assembly steps. This preliminary placement eliminates the positioning difficulties that occur when attempting to install insulation paper after stator assembly.
2Reliability
If insulating paper is disposed between coils, then insulation performance is improved, but paper movement and separation occur causing rotor interference
Solution Approach 1:
The insulating paper is integrated with the stator core structure by attaching it to the teeth surfaces, creating a unified assembly that prevents relative movement and separation. This merging of the insulating paper with the stator core eliminates the stability issues that arise from loose paper placement.
3Adaptability or versatility
If coil diameter is increased for series winding, then winding flexibility is improved, but interference with adjacent slot coils occurs
Solution Approach 1:
The stator core is divided into multiple teeth with individual slots, and each coil is positioned in a dedicated slot with insulating paper barriers. This segmentation isolates adjacent coils, preventing interference even when coils have larger diameters for series winding configurations.
Data Source
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AI summary
An embodiment relates to a stator and a motor including the stator, the stator comprising: a stator core; a coil wound around the stator core; and an insulator disposed between the stator core and the coil, wherein the insulator includes: a body around which the coil is wound; a first guide protruding from the inside of the body; a second guide protruding on the outside of the body a first protrusion protruding outward from the lateral surface of the first guide; and a second protrusion protruding inward from the inner surface of the second guide, and an insulating member radially disposed between the first guide and the second guide is bent in a circumferential direction by means of the first protrusion and the second protrusion. Therefore, the motor can prevent the movement and separation of insulating paper.