CN-119517568-B - Space type planar transformer and electronic equipment

CN119517568BCN 119517568 BCN119517568 BCN 119517568BCN-119517568-B

Abstract

The application relates to the technical field of magnetic devices and discloses a space type planar transformer and electronic equipment, which comprise a first laminated wiring board and at least one second laminated wiring board, wherein magnetic column windows are formed in the centers of the first wiring board and the second wiring board, at least one first coil group and one second coil group are arranged on the first wiring board and the second wiring board, the first coil group is wound on the outer side of the magnetic column windows, the second coil group is kept at intervals with the first coil group, or the second coil group is wound on the outer side of the magnetic column windows and is alternately arranged with the first coil group, connecting hole groups are formed in the first wiring board and the second wiring board, the first coil group on the first wiring board is electrically connected with the second coil group on the second wiring board through the connecting hole groups, and the second coil group on the first wiring board is electrically connected with the first coil group on the second wiring board through the connecting hole groups. The application optimizes the space of the planar transformer and improves the reliability of the device.

Inventors

CAI JINBO
LEI XIAODONG
LIU XIANG
MA JIANPENG

Assignees

东莞顺络功率器件有限公司

Dates

Publication Date: 20260512
Application Date: 20241227

Claims (7)

1.A space-type planar transformer, comprising: a first wiring board and at least one second wiring board stacked; The centers of the first wiring board and the second wiring board are provided with magnetic column windows, at least one first coil group and one second coil group are arranged on the first wiring board and the second wiring board, the first coil group is wound on the outer side of the magnetic column windows, and the second coil group on the same wiring board is positioned on one side of the first coil group and keeps a space with the first coil group; The first wiring board and the second wiring board are respectively provided with a connecting hole group, wherein the first coil group on the first wiring board is electrically connected with the second coil group on the second wiring board through the connecting hole groups, and the second coil group on the first wiring board is electrically connected with the first coil group on the second wiring board through the connecting hole groups; The first coil group on the same wiring board is of an annular structural design with a wiring notch, the second coil group is of a rectangular structural design, the wiring notch deviates from the second coil group, and the connecting hole groups are respectively located at the side edge of the second coil group and the wiring notch of the first coil group.
2. The space-type planar transformer of claim 1, wherein the first coil group comprises a plurality of first single-turn wire layers, the second coil group comprises a second single-turn wire layers having the same number as the first single-turn wire layers, and the plurality of first single-turn wire layers are sequentially sleeved from the position close to the magnetic pillar window to the position far from the magnetic pillar window.
3. The space-type planar transformer according to claim 2, wherein the first single-turn wire layer on the first wiring board and the second single-turn wire layer on the second wiring board are configured into a continuous winding coil through the connection hole group, and the output/input ends of the winding coil extend to the side of the first wiring board and are connected with PIN PINs of the first wiring board.
4. The space-type planar transformer according to claim 2, wherein the connection hole group includes a plurality of first and second function holes arranged in a line on the first and second wiring boards, the first and second function holes being distant from the magnetic pillar window design, the first single-turn wire layer of the first function hole connection portion, and the second function hole being connected at both ends of the second single-turn wire layer.
5. A space-type planar transformer according to claim 3, wherein the first functional hole on the first wiring board coincides with the second functional hole on the second wiring board, and the first functional hole on the second wiring board coincides with the projection of the second functional hole on the first wiring board in a direction perpendicular to the working surfaces of the first and second wiring boards.
6. The space-type planar transformer according to claim 4, wherein a distance between adjacent first or second functional holes is not less than 8mil, the aperture of the first or second functional holes comprises 6-10mil, and the first and second functional holes comprise through holes or blind buried holes.
7. An electronic device comprising a space-type planar transformer as claimed in any one of claims 1 to 6.

Description

Space type planar transformer and electronic equipment Technical Field The application relates to the technical field of magnetic devices, in particular to a space type planar transformer and electronic equipment. Background In the manufacturing process of magnetic devices, a planar transformer is a transformer using a planar structure to replace the traditional winding structure, and is widely applied to various high-frequency and efficient power supply systems, especially in occasions with higher space and performance requirements, winding coils of the planar transformer in the prior art are usually realized by performing development etching or laser etching processes on a Printed Circuit Board (PCB), winding modes are usually spiral wiring, different windings are usually connected by using through holes, so that signals are transmitted among a plurality of layers of the PCB, but the planar transformer in the prior art needs to consider that the coils avoid the through holes when the PCB is wired, the manufacturing cost of a buried hole or a blind hole structure is higher, the coils need to be bent to avoid the through holes to a certain extent, so that the size of the planar transformer is larger, the cost performance is not high, and the situation needs to be changed. Disclosure of Invention In view of the above, the present application provides a space-type planar transformer and an electronic device, so as to solve the above-mentioned technical problems. To achieve the above object, according to a first aspect, the following technical solution is adopted: a space-type planar transformer comprising: a first wiring board and at least one second wiring board stacked; The magnetic column window is arranged at the center of the first wiring board and the center of the second wiring board, at least one first coil group and one second coil group are arranged on the first wiring board and the second wiring board, the first coil group is wound on the outer side of the magnetic column window, the second coil group is kept at intervals with the first coil group, or the second coil group is wound on the outer side of the magnetic column window and is alternately arranged with the first coil group, connecting hole groups are arranged on the first wiring board and the second wiring board, the first coil group on the first wiring board is electrically connected with the second coil group on the second wiring board through the connecting hole groups, and the second coil group on the first wiring board is electrically connected with the first coil group on the second wiring board through the connecting hole groups. The application further provides that when the second coil group is kept at a distance from the first coil group, the first coil group comprises a plurality of first single-turn wire layers, the second coil group comprises second single-turn wire layers with the same number as the first single-turn wire layers, and the plurality of first single-turn wire layers are sequentially sleeved and arranged from the position close to the magnetic column window to the position far from the magnetic column window. The application is further arranged that the first single-turn wire layer on the first wiring board and the second single-turn wire layer on the second wiring board form a continuous winding coil through the connecting hole group, and the output/input end of the winding coil extends to the side edge of the first wiring board and is connected with the PIN PIN of the first wiring board. The application further provides that the connecting hole group comprises a plurality of first functional holes and second functional holes which are linearly arranged on the first wiring board and the second wiring board, the first functional holes and the second functional holes are far away from the magnetic column window design, the first single-turn wire layer of the connecting part of the first functional holes is connected with the head end and the tail end of the second single-turn wire layer, and the second functional holes are connected with the head end and the tail end of the second single-turn wire layer. The application is further arranged such that the first functional hole on the first wiring board coincides with the second functional hole on the second wiring board, and the first functional hole on the second wiring board coincides with the projection of the second functional hole on the first wiring board in a direction perpendicular to the working surfaces of the first and second wiring boards. The application is further characterized in that when the second coil group is kept at a distance from the first coil group, the first coil group is of an annular structure design with a wiring notch, the second coil group is of a rectangular structure design, the wiring notch faces away from the second coil group, and the connecting hole is respectively positioned at the side edge of the second coil group and the wiri