Application of flexible magnetic material for producing magnetic core of printed circuit board transformer

Abstract

The invention discloses a PCB transformer made of the flexible magnetism materials and the device of the novel PCB transformer, characterized in that: (1) the flexible magnetic conductive material with higher magnetic permeability is adopted to compose the magnetic core of the PCB transformer, wherein the magnetic core materials can be the electrician pure iron, the doped improved magnetism materials or other novel magnetic conductive materials; (2) the magnetic core structure can adopt the multi-corelong magnetic wire structure; (3) the magnetic core structure can adopt the braid over braid structure; (4) the magnetic core structure also can adopt the thin laminarization flexible magnetic tape structure; (5) the magnetic core and the coil of the PCB transformer adopt the matrix structure. The flexible magnetic conductive material materials and the PCB transformer design are combined, meanwhile the magnetic core of the PCB transformer and the coil adopt the matrix design project, to reduce the volume of the transformer, reduce the cost of the transformer and the number of the PCB ply.

Description

technical field [0001] The invention belongs to the field of transformers, and relates to the preparation of a novel planar transformer, in particular to the application of flexible magnetic materials for preparing printed circuit board transformer magnetic cores. Background technique [0002] Planar PCB (printed circuit board) transformer is an electromagnetic device widely used in PCB circuits, and its performance directly affects the working quality of the circuit. PCB transformer integrates transformer design with PCB design. It has great advantages in power density, volume and electromagnetic radiation. It has the characteristics of low profile, high efficiency, high voltage, high current, and low leakage inductance. It is widely used in digital camera, digital TV, communication power supply, automotive electronics and other fields. In order to improve the performance of PCB transformers, relevant researchers have done a lot of research work. At present, the research h...

AI Technical Summary

Problems solved by technology

Under the current technical conditions, considering the heating characteristics of the magnetic material, the magnetic material of the high-frequency PCB transformer is ferrite, and the magnetic flux density at the working point is low, which limits the use of PCB transformers with small volume and high power density. Further development is not conducive to the technical improvement of PCB transformers

On the other hand, the number of turns of a single-layer coil of a PCB transformer with a magnetic core is small. If the number of turns of the coil needs to be increased, the number of layers of the PCB board must be increased. In some applications, the number of layers of the PCB board can reach 16 layers, resulting in The high cost is not conducive to industrial application

Thirdly, the existing PCB transformer magnetic core structure mostly adopts E-shaped or U-shaped structure, and the magnetic core structure is also relatively simple, which is not conducive to the innovative design of the overall structure of the PCB transformer, and limits the flexibility of the PCB transformer structure and the rapid development of the new PCB transformer. develop

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