Planar winding coil for double-column magnetic core structure

Abstract

The invention discloses a planar winding coil for a double-column magnetic core structure.The head ends and the tail ends of PCB series windings are both led out from plated-through hole welding plates arranged on the outer edge of a PCB; the PCB is provided with two parallel magnetic core column installing through holes; a double-faced copper-coated base material is wired to form the four windings surrounding the two core column holes; the edge of each core column hole passes through a copper-faced wiring via hole, and therefore copper-coated wires surrounding the same core column form the double-layer series windings with the same winding direction; the two double-layer series windings surrounding the different core columns are connected in series in the opposite winding direction to form a double-column whole-board winding with the four windings connected in series.According to the planar winding coil, the technical limitation that a planar transformer single-column winding is manufactured on a traditional circuit board is changed, and under the condition of the same winding carrier density, the winding number two times of that of a single-layer board and the winding inductance value four times of that of the single-layer board can be achieved.

Description

technical field [0001] The invention relates to a planar winding coil, in particular to a planar winding coil suitable for a double-column magnetic core structure. Background technique [0002] Transformers are critical components in powering electronics. Existing transformers are large in size, which cannot meet the requirements of small and thin products. Planar transformers, especially planar plate transformers, are transformers formed by laying copper foil and other conductive foils as windings on a multilayer printed circuit board (PCB), and stacking them. The windings of this planar structure can greatly reduce the thickness of the transformer. . Planar transformers are widely used in communication, computer, industrial control, aerospace engineering, medical equipment and other products. However, due to the limitations of the printed circuit board processing technology and the thickness of the copper clad layer, the number of winding turns and the conduction cross ...

AI Technical Summary

Problems solved by technology

At the same time, the design of the winding and the wiring between the layers of the circuit board have formed technical difficulties and the manufacturing cost has soared; the winding that is too thick will cause a series of problems such as increased magnetic flux leakage of the transformer, reduced efficiency, and noise interference.

It can be seen that the practicability of the existing plate-type planar transformers is quite limited.

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