A transformer

Abstract

The utility model embodiment provides a kind of transformer, including middle lining including inner column and outer ring, and inner column and outer ring are equipped with accommodating groove;Accommodating groove is equipped with closed magnetic core;Inner column and outer ring are respectively equipped with annular distribution in, and several groups of first pass-through that are penetrated from top to bottom;The surface and / or inside of first PCB board, radially several groups of second pass-through are provided;Every group of second pass-through is equipped with A end, com end and B end;The surface and / or inside of second PCB board, radially several groups of third pass-through are provided;First PCB board is set to the first end of middle lining, and second PCB board is set to the second end of middle lining, so that first pass-through, second pass-through and third pass-through are electrically connected, and form A end to com end, and from com end to B end, and the loop around magnetic core. Through the above structure realizes no coil winding, solve the problem that the cost is high using coil, and weight is relatively larger, can greatly reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of power conversion equipment technology, and in particular to a transformer. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change voltage.

[0003] Existing transformer structures, whether large, small, or micro, almost universally consist of a magnetic core and at least two sets of windings wound around it. A loop is formed by coils surrounding the core; a changing current in this loop generates a changing magnetic field in the core. This magnetic field, in turn, generates an electric field in the loop formed by one or more sets of coils, thus creating an electromotive force. This is the basic structure and principle of existing transformers. These existing transformers all use coils, typically copper coils. On the one hand, the copper material used in the coils increases costs; on the other hand, the weight of the copper coils adds to the weight of the equipment. This not only results in high costs but also hinders miniaturization or weight reduction. Therefore, this invention proposes a transformer to at least partially solve the above problems. Utility Model Content

[0004] In view of the above problems, this utility model provides a transformer that overcomes or at least partially solves the above problems.

[0005] To address the aforementioned problems, this utility model discloses a transformer, comprising: The liner includes an inner column and an outer ring, wherein the inner column and the outer ring are provided with receiving grooves; a closed magnetic core is provided in the receiving grooves; The inner column and outer ring are respectively provided with several sets of first passages distributed in a ring and running through each other vertically; The surface and / or interior of the first PCB board are radially provided with several sets of second channels; each set of second channels is provided with an A end, a COM end and a B end; Several sets of third passages are radially arranged on the surface and / or inside of the second PCB board. The first PCB board is disposed at the first end of the intermediate liner, and the second PCB board is disposed at the second end of the intermediate liner, such that the first path, the second path and the third path are electrically connected, forming a loop from end A to end com and from end com to end B, and surrounding the magnetic core.

[0006] Optionally, the liner is further provided with a bottom plate, through which the first passage passes; The first PCB board and the base plate are bonded and electrically connected.

[0007] Optionally, the edge of the first PCB board is provided with multiple solder points, and the A terminal, COM terminal and B terminal are electrically connected to different solder points.

[0008] Optionally, the inner column has a through hole (vertically) penetrating the first PCB board and the second PCB board at its center.

[0009] Optionally, the outer periphery of the through hole is provided with a positioning hole that (vertically) penetrates the first PCB board and the second PCB board; There are at least two positioning holes.

[0010] Optionally, the intermediate liner, the first PCB board, and the second PCB board are made of the same circuit board substrate.

[0011] The embodiments of this utility model have the following advantages: The intermediate liner includes an inner column and an outer ring, both of which have receiving grooves. A closed magnetic core is housed within each receiving groove. Several sets of first passages, arranged in a ring and extending vertically, are respectively provided within the inner column and outer ring. Several sets of second passages are radially arranged on the surface and / or inside of a first PCB board. Each set of second passages has an A end, a COM end, and a B end. Several sets of third passages are radially arranged on the surface and / or inside of a second PCB board. The first PCB board is located at a first end of the intermediate liner, and the second PCB board is located at a second end of the intermediate liner, such that the first, second, and third passages are electrically connected, forming a loop from the A end to the COM end and from the COM end to the B end, surrounding the magnetic core. This structure achieves a coilless winding, solving the problems of high cost and relatively large weight associated with using coils, and significantly reducing costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a transformer provided in one embodiment of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of a transformer provided in one embodiment of the present utility model; Figure 3 This is a schematic diagram of the first exploded structure of a transformer according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the second explosive structure of a transformer provided in one embodiment of the present invention.

[0013] The attached diagram is described below: 10. First PCB board; 11. Solder joint; 20. Inner liner; 21. Base plate; 22. Outer ring; 23. Inner column; 24. Accommodating groove; 30. Second PCB board; 31. Third passage; 40. Magnetic core; 50. Through hole; 60. Positioning hole. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Reference Figures 1 to 2 As shown in some embodiments of this utility model, a transformer includes: a liner 20 comprising an inner column 23 and an outer ring 22, wherein the inner column 23 and the outer ring 22 are provided with receiving grooves 24; a closed magnetic core 40 is provided in the receiving grooves 24; several sets of first passages are respectively provided in the inner column 23 and the outer ring 22 in a ring distribution and penetrating vertically; several sets of second passages are radially arranged on the surface and / or inside of a first PCB board 10; each set of second passages is provided with an A end, a COM end and a B end; several sets of third passages 31 are radially arranged on the surface and / or inside of a second PCB board 30; the first PCB board 10 is disposed at the first end of the liner 20, and the second PCB board 30 is disposed at the second end of the liner 20, such that the first passages, the second passages and the third passages 31 are electrically connected, forming a loop from the A end to the COM end and from the COM end to the B end, and surrounding the magnetic core 40.

[0016] It should be noted that although a transformer is defined as a device that uses the principle of electromagnetic induction to change AC voltage, it can also convert voltage for nonlinear DC (DC pulse), as long as the current can generate a changing magnetic field in the transformer core.

[0017] In this application, the above-described structure solves the problem of high cost and heavy weight associated with traditional transformers, which require copper wire to be wound on a magnetic core. Specifically, a loop is formed around the closed magnetic core 40 through the pathways in the first PCB board 10 and the second PCB board 30, as well as the pathways within the inner column 23 and the outer ring 22. This loop replaces the coil winding, eliminating the need for a coil, saving on coil winding costs, and reducing weight. Furthermore, a loop is formed on the first circuit board at terminals A, COM, and B. In the transformer winding loops formed from terminal A to COM and from COM to B, terminals A, COM, and B can be used as three terminals or as two terminals. Since multiple sets of terminals A, COM, and B are provided, one set of terminals A connected to COM, COM to B, or A to B can be used as a main winding, with the rest as auxiliary windings, thus dividing the windings evenly. For example, in some lithium battery charging systems, the battery cell is generally composed of multiple basic cells. The transformer can be connected to the battery cell and serve as one of the main components for charging and discharging. This allows each group of cells to charge and discharge relatively stably and in a balanced manner. For example, 24 or 32 circuits can be set up, that is, there are 24 or 32 winding circuits from the A end to the COM end and from the COM end to the B end.

[0018] In some embodiments of this application, the intermediate liner 20 is further provided with a base plate 21, through which the first passage passes; the first PCB board 10 and the base plate 21 are bonded and electrically connected. The base plate 21 provides a support for the receiving groove 24 of the intermediate liner 20, facilitating the placement of the magnetic core 40 during assembly. Figures 1 to 4 As shown, the transformer is generally flat and cylindrical. The first channel inside the inner column 23 and the outer ring 22 can be electrically connected by vias in the circuit board. Corresponding pads can be provided on the bottom surface of the base plate 21 and the surfaces of the inner column 23 and the outer ring 22. The pads are electrically connected to the first channel. Corresponding pads are also provided on the first PCB board 10 and the second PCB board 30. The first PCB board 10 and the second PCB board 30 can be soldered using BGA to make the first PCB board 10 and the second PCB board 30 electrically connected to the intermediate liner 20.

[0019] It should be noted that via technology involves drilling holes in a circuit board and then processing the inside of the holes to connect the upper and lower surfaces of the circuit surface, directly forming an electrical connection through the holes.

[0020] Furthermore, the first PCB board 10 has multiple solder points 11 along its edge, and the A end, COM end, and B end are electrically connected to different solder points 11. By setting solder points 11 along the edge of the first PCB, and having the A end, COM end, and B end each electrically connected to different solder points, it can be easily applied to circuits, and connecting lines can be soldered from the periphery. It can also be soldered using wave soldering or pot soldering.

[0021] The inner column 23 has a through hole 50 (vertically) penetrating the first PCB board 10 and the second PCB board 30 at its center. This not only further reduces the overall weight of the transformer but also serves as a mounting hole for mounting other electronic devices. The outer periphery of the through hole 50 has positioning holes 60 (vertically) penetrating the first PCB board 10 and the second PCB board 30; there are at least two positioning holes 60, as shown in Figure 1. Figure 3 and Figure 4 As shown, four positioning holes are preferably provided to facilitate the alignment of the first PCB board 10, the second PCB board 30, and the middle liner 20 during assembly, preventing misalignment during installation and ensuring that the first PCB board 10, the second PCB board 30, and the middle liner 20 can be correctly connected.

[0022] The inner liner 20, the first PCB board 10, and the second PCB board 30 are made of the same type of circuit board substrate; specifically, the first PCB board 10, the second PCB board 30, and the inner liner 20 are made of circuit board substrate, wherein the circuit board substrate includes phenolic resin, glass fiber / epoxy resin, polyimide resin, BT epoxy resin, etc., which are all organic materials.

[0023] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0024] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0025] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0026] The transformer provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A transformer, characterized in that, include: The inner liner (20) includes an inner column (23) and an outer ring (22), wherein the inner column (23) and the outer ring (22) are provided with receiving grooves (24); a closed magnetic core (40) is provided in the receiving grooves (24); The inner column (23) and outer ring (22) are respectively provided with several sets of first passages that are distributed in a ring and run through each other vertically; The surface and / or interior of the first PCB board (10) are radially provided with several sets of second passages; each set of second passages is provided with an A end, a COM end and a B end; Several sets of third passages (31) are radially arranged on the surface and / or inside of the second PCB board (30). The first PCB board (10) is disposed at the first end of the middle liner (20), and the second PCB board (30) is disposed at the second end of the middle liner (20), such that the first path, the second path and the third path (31) are electrically connected and form a loop from end A to end com and from end com to end B, and around the magnetic core (40).

2. The transformer according to claim 1, characterized in that, The lining (20) is also provided with a bottom plate (21), and the first passage passes through the bottom plate (21). The first PCB board (10) and the base plate (21) are bonded and electrically connected.

3. The transformer according to claim 2, characterized in that, The first PCB board (10) has multiple solder joints (11) along its edge, and the A end, com end and B end are electrically connected to different solder joints (11).

4. The transformer according to claim 1, characterized in that, The inner column (23) has a through hole (50) at its center that penetrates the first PCB board (10) and the second PCB board (30).

5. The transformer according to claim 4, characterized in that, The through hole (50) is provided with a positioning hole (60) that penetrates the first PCB board (10) and the second PCB board (30) on its outer periphery. There are at least two positioning holes (60).

6. The transformer according to claim 1, characterized in that, The inner liner (20), the first PCB board (10), and the second PCB board (30) are made of the same circuit board substrate.

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