CN216389028U

CN216389028U - Planar transformer

Info

Publication number: CN216389028U
Application number: CN202122964553.7U
Authority: CN
Inventors: 刘洋
Original assignee: Shenzhen Qinji Technology Co ltd
Current assignee: Shenzhen Qinji Technology Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-26
Anticipated expiration: 2031-11-29

Abstract

The utility model provides a planar transformer which comprises a main-level winding, a main circuit board, a sub circuit board and a magnetic core group, wherein the main circuit board and the sub circuit board are respectively provided with a secondary winding, the magnetic core group is respectively sleeved on the secondary winding of the main circuit board and the secondary winding of the sub circuit board, the main-level winding is arranged between the secondary winding of the main circuit board and the secondary winding of the sub circuit board, and the main-level winding and the secondary winding of the sub circuit board are connected with the main circuit board through connecting columns. The utility model has the beneficial effects that: the transformer integrates the secondary winding on the circuit board, the sub circuit board integrated with the secondary winding and the main winding are overlapped on the main circuit board integrated with the secondary winding from top to bottom in a laminating mode, and finally, the magnetic cores are arranged on the upper side and the lower side, so that the use of materials is reduced, the utilization rate of the materials is effectively improved, the production process is optimized, and the light, thin/small design of a product is realized.

Description

Planar transformer

Technical Field

The utility model relates to the technical field of transformer structures, in particular to a planar transformer.

Background

The conventional switching power supply generally adopts a traditional transformer or a planar transformer as a key device for power conversion, wherein the common transformer is composed of a framework and a magnetic core, the volume of the transformer in a product is large, the volume of the product is difficult to further reduce, and the planar transformer is composed of a circuit board and the magnetic core, has a complex structure, is not beneficial to the production process and has higher overall cost.

There is therefore a need for improvements in the prior art.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: aiming at the defects of the prior art, the planar transformer which is reasonable in structure and convenient to assemble is provided.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a planar transformer, includes main level wire winding, main circuit board, sub circuit board and magnetic core group, main circuit board and sub circuit board all are equipped with secondary wire winding, the magnetic core group cup joint respectively in the secondary wire winding of main circuit board with the secondary wire winding of sub circuit board, main level wire winding set up in between the secondary wire winding of main circuit board and sub circuit board, main level wire winding with the secondary wire winding of sub circuit board all through the spliced pole with main circuit board is connected.

Furthermore, the magnetic core group comprises a first magnetic core part and a second magnetic core part, and the main circuit board is provided with an avoidance through hole corresponding to the first magnetic core part and the second magnetic core part; the sub circuit board is provided with an avoiding through hole corresponding to the first magnetic core part.

Furthermore, the primary winding and the secondary winding are both of a wire cake structure.

Furthermore, the two magnetic core groups are fixed through a buckle.

Furthermore, the magnetic core group is provided with a clamping groove corresponding to the clamping buckle.

Further, the primary winding is a multi-insulated coil.

Further, the secondary winding is provided with an insulating layer.

Further, the secondary winding is provided with a plurality of output ends.

Further, the heights of the first magnetic core part and the second magnetic core part are matched with the thickness of the main circuit board.

Furthermore, main circuit board includes that power components and parts place the district, power components and parts place the district and are equipped with power components and parts.

The utility model has the beneficial effects that: the transformer integrates the secondary winding on the circuit board, the sub circuit board integrated with the secondary winding and the main winding are overlapped on the main circuit board integrated with the secondary winding from top to bottom in a laminating mode, and finally, the magnetic cores are arranged on the upper side and the lower side, so that the use of materials is reduced, the utilization rate of the materials is effectively improved, the production process is optimized, and the light, thin/small design of a product is realized.

Drawings

The specific structure of the utility model is detailed below with reference to the accompanying drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic illustration of an explosive structure according to the present invention;

FIG. 3 is a top view of the present invention

FIG. 4 is a schematic cross-sectional view taken along the line A-A in FIG. 3;

1-primary winding;

2-a main circuit board; 21-connecting column; 22-a first avoiding through hole; 23-a second avoiding through hole;

3-a daughter circuit board; 31-avoiding the through hole;

4-a magnetic core group; 41-a first core portion; 42-a second core portion; 43-a snap groove;

5-secondary winding;

6-buckling.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Examples

Referring to fig. 1 to 4, a planar transformer includes a primary winding 1, a primary circuit board 2, a secondary circuit board 3 and a magnetic core set 4,

the main circuit board 2 and the sub circuit board 3 are both provided with secondary windings 5, and the secondary windings 5 are both arranged on the main circuit board 2 and the sub circuit board 3 in a printed circuit mode and are in a wire cake structure. In order to ensure that no short-circuit-caused failure occurs between the secondary winding 5 and the main winding 1, the secondary winding 5 is provided with an insulating layer.

The secondary winding 5 may be provided with a plurality of outputs to provide a variety of voltage outputs. Similarly, the secondary windings with various specifications are respectively arranged on different layers of the main circuit board and the sub circuit board, and the same multi-voltage output effect can be realized.

The main level wire winding 1 set up in between the secondary wire winding 5 of main circuit board 2 and the secondary wire winding 5 of sub circuit board 3, wherein, main level wire winding 1 sets up with two secondary wire windings 5 concentric circles, main level wire winding 1 with the secondary wire winding 5 of sub circuit board 3 all through spliced pole 21 with main circuit board 2 is connected. The connection posts specifically include two connection posts of primary winding and a connection post of secondary winding 5 of the plurality of daughter circuit boards 3.

Preferably, the primary winding 1 is a multiple insulation coil with a wire cake structure, so that the thickness of the primary winding 1 can be reduced, and the primary winding 1 is ensured to have good insulation performance. In order to further secure the insulating performance between the main winding wire 1 and the secondary winding wire 5, an insulating sheet may be further provided between the main winding wire 1 and the secondary winding wire 5.

The magnetic core group 4 comprises a first magnetic core part 41 and a second magnetic core part 42, the second magnetic core part 42 is arranged around the first magnetic core part 41, the main circuit board 2 corresponds to the first magnetic core part 41 and the second magnetic core part 42 are respectively provided with a first avoiding through hole 22 and a second avoiding through hole 23, and the magnetic core group 4 is sleeved on the secondary winding 5 of the main circuit board 2 through the two avoiding through holes to realize installation.

The sub circuit board 3 is provided with an avoiding through hole 31 corresponding to the first magnetic core part 41, and the magnetic core group 4 is sleeved on the secondary winding 5 of the sub circuit board 3 through the avoiding through hole 31 to realize installation.

Two magnetic core groups 4 are fixed through buckles 6, and two magnetic core groups 4 can be sleeved on the main circuit board 2 and the sub circuit board 3, so that the assembly of the planar transformer is completed. In order to guarantee the reliability of 6 installations of buckle, the two sides that the magnetic core group 4 carried on the back mutually correspond buckle 6 and are equipped with buckle groove 43, and when accomplishing the installation, 6 blocks of buckle are gone into in buckle groove 43, can prevent to lead to buckle 6 to drop because of unexpected vibrations, cause planar transformer to disintegrate, lead to breaking down.

Further, in order to secure the thickness of the planar transformer, the heights of the first core portion 41 and the second core portion 42 are adapted to the thickness of the main circuit board 2, so that the performance can be secured while the thickness is minimized, which is advantageous for ultra-thinning.

In order to ensure high integration, the main circuit board 2 comprises a power component placing area, and the power component placing area is provided with power components, so that the distance from the transformer to the power components can be shortened, and the input/output loss is effectively reduced.

From the above description, the beneficial effects of the present invention are: the transformer integrates the secondary winding on the circuit board, the sub circuit board integrated with the secondary winding and the main winding are overlapped on the main circuit board integrated with the secondary winding from top to bottom in a laminating mode, and finally, the magnetic cores are arranged on the upper side and the lower side, so that the use of materials is reduced, the utilization rate of the materials is effectively improved, the production process is optimized, and the light, thin/small design of a product is realized.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A planar transformer, characterized by: including primary winding, main circuit board, daughter circuit board and magnetic core group, main circuit board and daughter circuit board all are equipped with secondary winding, the magnetic core group cup joint respectively in the secondary winding of main circuit board with the secondary winding of daughter circuit board, the primary winding set up in between the secondary winding of main circuit board and the secondary winding of daughter circuit board, the primary winding with the secondary winding of daughter circuit board all through the spliced pole with main circuit board connects.

2. The planar transformer of claim 1, wherein: the magnetic core group comprises a first magnetic core part and a second magnetic core part, and the main circuit board is provided with avoidance through holes corresponding to the first magnetic core part and the second magnetic core part; the sub circuit board is provided with an avoiding through hole corresponding to the first magnetic core part.

3. The planar transformer of claim 2, wherein: and the primary winding and the secondary winding are both of a wire cake structure.

4. The planar transformer of claim 3, wherein: the two magnetic core groups are fixed through a buckle.

5. The planar transformer of claim 4, wherein: the magnetic core group is provided with a buckle groove corresponding to the buckle.

6. The planar transformer of claim 5, wherein: the main winding is a multiple insulation coil.

7. The planar transformer of claim 6, wherein: the secondary winding is provided with an insulating layer.

8. The planar transformer of claim 7, wherein: the secondary winding is provided with a plurality of output terminals.

9. The planar transformer of claim 8, wherein: the heights of the first magnetic core part and the second magnetic core part are matched with the thickness of the main circuit board.

10. The planar transformer of claim 9, wherein: the main circuit board comprises a power component placing area, and the power component placing area is provided with a power component.