Delta Electronics has filed a patent for a stator structure that includes a silicon steel sheet with pole faces. The structure is covered by a first plastic material, with a second plastic material forming on top. The second plastic material does not cover the portion of the first plastic material on the pole faces. The first plastic material has a higher thermal conductivity than the second plastic material. GlobalData’s report on Delta Electronics gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Delta Electronics, Battery management systems was a key innovation area identified from patents. Delta Electronics's grant share as of September 2023 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Stator structure with two plastic materials of different thermal conductivity
A recently filed patent (Publication Number: US20230318364A1) describes a stator structure that includes a silicon steel sheet with multiple pole faces. The stator structure is covered with two different plastic materials. The first plastic material covers the silicon steel sheet, while the second plastic material forms on top of the first plastic material. Notably, a portion of the first plastic material on the pole faces is left uncovered by the second plastic material. The first plastic material has a higher thermal conductivity compared to the second plastic material.
The patent claim also specifies that the thermal conductivity difference between the first and second plastic materials is at least 0.5 W/m·K. Additionally, the fluidity of the second plastic material is higher than that of the first plastic material, and the hardness of the first plastic material is higher than that of the second plastic material.
The stator structure is manufactured using an injection molding process, where the first plastic material covers the silicon steel sheet. Subsequently, the second plastic material is potted on top of the first plastic material, excluding the portion on the pole faces. This configuration allows for the creation of an insulating carrier with a winding portion, where the first plastic material completely covers the silicon steel sheet.
In some embodiments, the stator structure includes at least one winding and a circuit board. The winding is wound on the winding portion of the insulating carrier and assembled with the circuit board.
Overall, this patent describes a stator structure that utilizes different plastic materials to achieve specific thermal conductivity and hardness properties. The configuration allows for efficient insulation and assembly of windings and circuit boards.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
