Multilayer plane winding coil designing method suitable for double column magnetic core structure

Abstract

The invention discloses a multilayer plane winding coil designing method suitable for double column magnetic core structure. The method comprises the following steps: installing through holes and a plurality of metalized hole welding plates on two parallel magnetic core columns of a PCB; drawing the head end and the tail end of windings in series connection on the whole board from two of the metalized hole welding plates of the PCB; using double-face copper-clad base materials for going wires and forming four windings around the two core column holes; obtaining a multilayer plane winding coil in such a manner that the edges of each core column hole are provided with going wires and through holes through multiple copper faces to make the copper clad going wires around the same core column form double layer series connection windings wrapped in the same direction; and lastly, providing an insulation layer between two adjacent PCBs; and providing insulation layers both at the top and the bottom of the multilayer plane winding coil of the double column magnetic core structure. In the invention, the technical limitation of the single-column winding of a planar transformer is changed, and under the same winding current-carrying density, winding coils are two times as many and winding inductance is four times as much as those of the single-layer board.

Description

technical field [0001] The invention relates to a design method of a planar winding coil, in particular to a design method of a multi-layer 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 transformer thickness. 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 o...

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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