Low-profile transformer

By winding the coil onto the hollow column of the winding frame and using an insulating layer, the problem of increased height in thin transformers was solved, achieving a lightweight design and improved efficiency.

WO2025251277A1PCT designated stage Publication Date: 2025-12-11DELTA ELECTRONICS INC(CN)
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Patent Information

Application Number
PCT/CN2024/097952
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-06-07
Publication Date
2025-12-11

AI Technical Summary

Technical Problem

Existing thin transformer structures increase the distance between the main winding coil and the secondary winding coil to increase leakage inductance, resulting in an increase in transformer height, which cannot meet the requirements for a thin and light appearance.

Method used

It adopts a winding frame design, including a hollow column and iron core structure. The winding group is set on the hollow column, and an insulation layer is set between the winding groups to increase leakage inductance, replacing the traditional resonant inductor and reducing the internal space occupation.

Benefits of technology

This achieves a slim and lightweight design for the thin transformer while increasing leakage inductance, reducing costs and improving efficiency.

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    Figure CN2024097952_11122025_PF_FP_ABST
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Abstract

Provided in the present invention is a low-profile transformer, comprising a bobbin, a pair of cores, a first winding set, and a second winding set. The bobbin has a first plate body and a hollow column protruding from the first plate body. The pair of cores are arranged on opposite sides of the bobbin. The first winding set is wound around the hollow column and arranged on the first plate body, and is located between the pair of cores. The second winding set surrounds the first winding set and is arranged on the first plate body. There is a spacing between the second winding set and the first winding set.
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Citation Information

Patent Citations

  • Magnetic core, winding frame and transformer

    CN103839659A

  • Light-emitting diode (LED) tube and thin transformer thereof

    CN203052333U

  • Transformer

    JP2014216373A