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Planar transformer and manufacturing method thereof

A planar transformer and coil technology, applied in the field of transformers, can solve the problems of complex manufacturing process, large volume, unfavorable structure and heat dissipation, etc., achieve good consistency and high withstand voltage performance, reduce thickness, and ensure the effect of insulation

Inactive Publication Date: 2019-04-30
SHENZHEN SUNLORD ELECTRONICS
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] Generally, the traditional transformer is made by winding the coil on the skeleton and then assembling it with the magnetic core. This kind of product has a large volume, and its structure is not conducive to heat dissipation, so it is difficult to achieve high-frequency, low-loss electromagnetic coupling performance , while the existing planar transformer using PCB board can reduce the product volume, but the manufacturing process is complicated. The coil structure formed on the PCB board is usually wound with two coils separately, and then pasted on both sides of the PCB coil. High reliability and high voltage resistance are difficult to guarantee

Method used

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  • Planar transformer and manufacturing method thereof
  • Planar transformer and manufacturing method thereof
  • Planar transformer and manufacturing method thereof

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Embodiment Construction

[0034] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0035] refer to Figure 1 to Figure 5 , In one embodiment, an injection-molded planar transformer with α-winding includes a PCB coil 1 , an α-coil 2 , a magnetic core 3 , terminals 4 , and spacers 5 . The PCB coil 1 includes a multi-layer printed circuit board structure. Taking one layer as an example, the printed circuit board is provided with a via hole 11 and a coil winding 12. The coil winding 12 is printed on the PCB board 13 and is connected with the The vias 11 are connected. Both sides of the PCB coil 1 are provided with a plurality of pads 14, and the terminals 4 are installed in the pads 14 by soldering. Meanwhile, the center of the PCB coil 1 is provided with a central hole 15, and the edge of the central hole 15 is provided with a concave ...

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Abstract

The invention discloses a planar transformer and a manufacturing method thereof. The planar transformer includes a PCB coil, magnetic cores, an alpha coil and terminals. The PCB coil contains multiplewindings which are printed on a PCB in a layered manner. The alpha coil is wound on the PCB coil by an alpha winding method, and then, a PCB coil assembly is obtained by injection molding. A first magnetic core and a second magnetic core are connected together with the PCB coil assembly through epoxy resin glue. The planar transformer adopts an alpha winding method and an injection molding processing method, has good consistency and high reliability, meets any safety requirement, and is suitable for the field of power supplies with high withstand voltage.

Description

technical field [0001] The invention relates to a transformer, in particular to a planar transformer and a manufacturing method thereof. Background technique [0002] With the increasingly sophisticated, complex and multi-functional electronic systems, electromagnetic interference is becoming more and more serious. Good electromagnetic coupling performance, high saturation performance, high reliability performance and high withstand voltage performance of products have become key considerations in the design of electronic products. At the same time, Higher requirements are also put forward for the volume and structure of the product. [0003] Generally, the traditional transformer is made by winding the coil on the skeleton and then assembling it with the magnetic core. This kind of product has a large volume, and its structure is not conducive to heat dissipation, so it is difficult to achieve high-frequency, low-loss electromagnetic coupling performance , while the existi...

Claims

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Application Information

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IPC IPC(8): H01F27/26H01F27/28H01F27/32H01F27/34H01F41/00H01F41/04
Inventor 陈甜甜蔡金波刘翔
Owner SHENZHEN SUNLORD ELECTRONICS
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