An integrated PCB planar transformer
CN122930702APending Publication Date: 2026-10-16DONGGUAN MENTECH OPTICAL & MAGNETIC CO LTD
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Patent Information
- Application Number
- CN202610944760.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-29
- Publication Date
- 2026-10-16
AI Technical Summary
Technical Problem
[0005]发明人发现，现有的变压器体积大、功率密度低、散热性能差、生产一致性与可靠性不足、成本高、组装工序繁琐，以及漏感利用困难；可通过将变压器绕组以PCB平面绕组替代绕线结构，以降低高度并提高一致性；但是，大多局限于单个变压器的平面化，未实现OBC变压器、DC变压器和谐振电感的深度集成，且原副边之间的安规绝缘、磁芯结构的气隙设计、多绕组之间的互联方式等仍存在较多挑战
Benefits of technology
本发明通过将需独立骨架、底座及外壳的三个磁性元件（OBC变压器磁芯、DC主变压器磁芯以及谐振电感磁芯）集成在同一PCB模块上，节省了底座、骨架及连接件；同时，采用PCB平板绕组替代传统绕线式绕组，有效降低了变压器的整体厚度和体；OBC变压器磁芯、DC主变压器磁芯及谐振电感磁芯均直接贴合于PCB模块表面，形成扁平大面积的导热路径，磁芯与PCB之间的热阻极低；同时，PCB板上的原副边绕组采用大面积露铜层布设，铜箔面积大、热扩散能力强；采用PCB蚀刻工艺形成平板绕组，配合SMT表面贴装工艺进行组装，完全避免了传统方案中人工绕线或半自动绕线所带来的制造公差；各绕组参数（电感量、漏感、匝比等）一致性好，偏差可控制在3%以内，特别适用于LLC谐振变换器等对谐振参数敏感的高性能拓扑。
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Abstract
The application belongs to the technical field of transformers, and particularly relates to an integrated PCB flat transformer, which comprises a PCB module, an OBC transformer magnetic core assembly, a resonant inductor magnetic core assembly and a DC main transformer magnetic core assembly which are integrally arranged on the PCB module; wherein the OBC transformer magnetic core assembly comprises a first OBC transformer magnetic core and a second OBC transformer magnetic core, the resonant inductor magnetic core assembly comprises a first resonant inductor magnetic core and a second resonant inductor magnetic core, the DC main transformer magnetic core assembly comprises a first DC main transformer magnetic core and a second DC main transformer magnetic core, the first OBC transformer magnetic core, the first resonant inductor magnetic core and the first DC main transformer magnetic core are arranged on the same side of the PCB module, and the second OBC transformer magnetic core, the second resonant inductor magnetic core and the second DC main transformer magnetic core are arranged on the other side of the PCB module.
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