Copper sheet multi-winding high-power planar transformer

Abstract

The utility model belongs to the technical field of transformers, and provides a copper sheet multi-winding high-power planar transformer, which comprises a magnetic core and a winding component, the magnetic core comprises a first magnetic core and a second magnetic core, a magnetic core column is arranged in the middle of the first magnetic core, the first magnetic core is in contact connection with the second magnetic core, and the winding component is arranged in the magnetic core column. A center hole is formed in the middle of the winding assembly, the magnetic core column penetrates through the center hole of the winding assembly, the winding assembly comprises an input assembly and an output assembly, and the input assembly and the output assembly respectively comprise a plurality of input copper sheets and output copper sheets which are connected in sequence. The copper sheet winding is used for replacing traditional round enameled wire winding, so that under the condition of the same occupied space, the space utilization rate is larger, the effective cross sectional area of the winding is larger, the resistance value is smaller, and the working condition that the transformer is small in size and large in current is achieved.

Description

Technical Field

[0001] The utility model relates to the field of transformers, in particular to a copper sheet multi-winding high-power planar transformer. Background Art

[0002] A transformer is a device that uses electromagnetic mutual induction to transform voltage, current and impedance. When voltage is input to the primary coil, current flows through the primary coil, and the primary coil generates an alternating magnetic field. Most of the magnetic lines of force of the magnetic field form a loop with the magnetic core. Therefore, the secondary coil is also wound around the magnetic core, and the changing magnetic lines of force pass through the secondary coil, generating an induced electromotive force at both ends of the secondary coil.

[0003] Conventional high-power transformers use round enameled wires for winding. If you want to achieve the effect of low voltage and high current, you need to connect multiple round enameled wires in parallel. This method takes up a lot of wasted space, and the cross-sectional area of ​​the winding is relatively small, and the resistance value is relatively large.

[0004] Therefore, a copper sheet multi-winding high-power planar transformer is needed, which can achieve higher space utilization under the same volume, make the winding cross-sectional area larger, and make the resistance value smaller, so as to realize the working condition of small volume and high current of the transformer. Utility Model Content

[0005] In view of the defects in the prior art, the utility model provides a copper sheet multi-winding high-power planar transformer to improve the space utilization of the windings, increase the winding cross-sectional area, and reduce the transformer resistance value.

[0006] In order to solve the above problems, the utility model provides a copper sheet multi-winding high-power planar transformer, comprising a magnetic core and a winding assembly, wherein the magnetic core comprises a first magnetic core and a second magnetic core, a magnetic core column is arranged in the middle of the first magnetic core, the first magnetic core is in contact with and connected to the second magnetic core, a central hole is arranged in the middle of the winding assembly, and the magnetic core column passes through the central hole of the winding assembly;

[0007] The winding assembly comprises an input assembly and an output assembly, wherein the input assembly and the output assembly respectively comprise a plurality of input copper sheets and output copper sheets connected in sequence.

[0008] The utility model uses copper sheet windings to replace traditional round enameled wire windings. Traditional round enameled wire windings need to connect multiple enameled wires in parallel to achieve low voltage and high current. Since there are gaps between the round enameled wires when they are wound, a lot of space is wasted. The copper sheet windings used in the utility model make greater use of space under the same space occupation, make the effective cross-sectional area of ​​the winding larger, and make the resistance value smaller, that is, the working condition of small volume and high current of the transformer can be achieved.

[0009] Preferably, the input copper sheet and the output copper sheet both include an integral copper sheet and a split copper sheet;

[0010] The integral copper sheet includes an annular body, and the split copper sheet includes two semi-annular bodies located in the same plane. The integral copper sheet is defined as 1 turn, and the split copper sheet is defined as 0.5 turn. By designing and using a split copper sheet with 0.5 turns, the requirement of a half-turn winding is met, and the winding can be expanded to a combination of 1.5 turns, 2.5 turns or more turns by series or parallel connection. At the same time, the 0.5-turn split copper sheets are assembled on the same layer, effectively saving the core space.

[0011] Preferably, the input components are interconnected through a first connecting structure, which includes a first connecting pin arranged on a part of the input copper sheets and a first connecting hole arranged on another part of the input copper sheets, and the first connecting pin is inserted into the corresponding first connecting hole to facilitate the mutual series connection between the input copper sheets.

[0012] Preferably, the output components are interconnected through a second connecting structure, the second connecting structure includes a second connecting pin arranged on a part of the output copper sheets and a second connecting hole arranged on another part of the output copper sheets, the second connecting pin is inserted into the corresponding second connecting hole to facilitate the mutual series connection between the output copper sheets.

[0013] Preferably, the input component and the output component also include a plurality of third connecting pins, and the third connecting pins are used to be electrically connected to a PCB board. The PCB board can provide a reliable electrical connection, and a circuit is formed by welding or fixing the second connecting pins on the PCB board to facilitate the realization of different series and parallel relationships of the windings.

[0014] Preferably, the input component further comprises a fourth connecting pin, the fourth connecting pin is electrically connected via the first pin, the first pin connects the fourth connecting pin in parallel and simultaneously inputs the original voltage and current into the winding.

[0015] Preferably, it also includes several second pins, and the output copper sheet of some of the output components is provided with a third connecting hole plugged with the second pin. The second pin connects the integral copper sheet and the split copper sheet in series, and the second pin outputs the voltage and current changed by the output copper sheet.

[0016] Preferably, a core tape is provided on the outer periphery of the magnetic core, and a thermally conductive double-sided tape is provided on the top of the core tape.

[0017] Preferably, the cross-sectional shape of the magnetic core column is circular, rectangular or elliptical, so that the copper sheet is applicable to a variety of magnetic core column products.

[0018] Preferably, insulating sheets are provided on the upper and lower sides of the input copper sheet and the output copper sheet. The provision of the insulating sheets not only insulates the copper sheets from each other, but also has the functions of resisting high temperature and preventing fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0020] Figure 1 An exploded view of a copper sheet multi-winding high-power planar transformer according to an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of a copper sheet multi-winding high-power planar transformer according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of another viewing angle of a copper sheet multi-winding high-power planar transformer according to an embodiment of the utility model;

[0023] Figure 4 for Figure 1 Input component assembly exploded view in;

[0024] Figure 5 for Figure 1 Output component assembly exploded view in;

[0025] Figure 6 A schematic diagram of a copper sheet of an input component of a copper sheet multi-winding high-power planar transformer according to an embodiment of the utility model;

[0026] Figure 7 A schematic diagram of a copper sheet of an output component of a copper sheet multi-winding high-power planar transformer according to an embodiment of the utility model;

[0027] In the accompanying drawings, 1. input component; 2. output component; 3. first magnetic core; 4. second magnetic core; 5. thermal conductive double-sided tape; 6. core tape; 7. first pin; 8. second pin; 101. first connecting hole; 102. first connecting pin; 103. third connecting pin; 104. fourth connecting pin; 201. second connecting pin; 202. second connecting hole; 203. third connecting hole; 301. magnetic core column. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0030] Reference Figures 1 to 7 This embodiment provides a copper sheet multi-winding high-power planar transformer, including a magnetic core and a winding assembly, the magnetic core includes a first magnetic core 3 and a second magnetic core 4, a magnetic core column 301 is arranged in the middle of the first magnetic core, the first magnetic core 3 is in contact with the second magnetic core 4, a central hole is arranged in the middle of the winding assembly, and the magnetic core column 301 passes through the central hole of the winding assembly;

[0031] The winding assembly includes an input assembly 1 and an output assembly 2. The input assembly 1 and the output assembly 2 respectively include a plurality of input copper sheets and output copper sheets connected in sequence. Copper sheet winding is used instead of traditional round enameled wire winding. Traditional round enameled wire winding needs to connect a plurality of enameled wires in parallel to achieve low voltage and high current. Since there are gaps between the wires of the round enameled wire when winding, a lot of space is wasted. By adopting copper sheet winding, the space utilization rate is higher under the same space occupation condition, the effective cross-sectional area of ​​the base winding is larger, and the DC resistance value is smaller, so as to realize the working condition of small volume and high current of the transformer. At the same time, the copper sheet winding can be produced by an automatic punching machine, which effectively reduces the cost of raw materials of the transformer. The input and output relationship, assembly sequence and quantity of the input assembly and the output assembly can be changed according to the needs of different products.

[0032] In this embodiment, the above-mentioned input copper sheet and output copper sheet both include integral copper sheets and split copper sheets, wherein the integral copper sheet includes an annular body, and the split copper sheet includes two semi-annular bodies located in the same plane. The integral copper sheet is defined as 1 turn, and the split copper sheet is defined as 0.5 turn. By designing and using 0.5 turns of copper sheets, the requirement of half-turn winding is met, and the winding can be expanded to 1.5 turns, 2.5 turns or more turns in series or parallel. At the same time, the 0.5-turn split copper sheets are assembled on the same layer, which effectively saves the core space.

[0033] The input copper sheets of the input component are interconnected through a first connection structure, which includes a first connection pin 102 arranged on a part of the input copper sheets and a first connection hole 101 arranged on another part of the input copper sheets. The first connection pin 102 is inserted into the corresponding first connection hole 101 to facilitate the mutual series connection between the input copper sheets.

[0034] The output copper sheets of the output component 2 are interconnected through a second connecting structure, which includes a second connecting pin 201 arranged on a part of the output copper sheets and a second connecting hole 202 arranged on another part of the output copper sheets. The second connecting pin 201 is inserted into the corresponding second connecting hole 202 to facilitate the mutual series connection between the output copper sheets.

[0035] The input component 1 and the output component 2 also include a plurality of third connecting pins 103, which are used to be electrically connected to a PCB board. The PCB board can provide a reliable electrical connection. By welding or fixing the third connecting pins 103 on the PCB board, the entire circuit is formed to facilitate the realization of different series and parallel relationships of the windings.

[0036] The input component further includes a fourth connection pin 104, which is electrically connected via the first pin 102. The first pin connects the fourth connection pin in parallel and simultaneously inputs the original voltage and current into the winding.

[0037] It also includes several second pins 8. Some output copper sheets of the output component 2 are provided with third connecting holes 203 plugged with the second pins 8. The second pins connect the integral copper sheet and the split copper sheet in series, and the second pins output the voltage and current changed by the output copper sheet.

[0038] A core tape 6 is arranged on the outer periphery of the magnetic core, and a heat-conducting double-sided adhesive tape 5 is arranged on the top of the core tape 6 .

[0039] The cross-sectional shape of the magnetic core column 301 is circular, rectangular or elliptical, so that the copper sheet is applicable to a variety of magnetic core column products.

[0040] Insulating sheets matching the copper sheets are provided on the upper and lower sides of the input copper sheet and the output copper sheet. The setting of the insulating sheets not only insulates the input copper sheet and the output copper sheet from each other, but also has the functions of resisting high temperature and preventing fire.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A copper sheet multi-winding high-power planar transformer, characterized in that: The invention comprises a magnetic core and a winding assembly, wherein the magnetic core comprises a first magnetic core (3) and a second magnetic core (4), a magnetic core column (301) is arranged in the middle of the first magnetic core, the first magnetic core (3) is in contact with and connected to the second magnetic core (4), a central hole is arranged in the middle of the winding assembly, and the magnetic core column (301) passes through the central hole of the winding assembly; The winding assembly comprises an input assembly (1) and an output assembly (2), wherein the input assembly (1) and the output assembly (2) respectively comprise a plurality of input copper sheets and output copper sheets connected in sequence.

2. A copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: The input copper sheet and the output copper sheet both include an integral copper sheet and a split copper sheet; The integral copper sheet includes an annular body, and the split copper sheet includes two semi-annular bodies located in the same plane.

3. The copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: The input components are connected to each other via a first connection structure, wherein the first connection structure comprises a first connection pin (102) provided on a portion of the input copper sheet and a first connection hole (101) provided on another portion of the input copper sheet, wherein the first connection pin (102) is inserted into the corresponding first connection hole (101).

4. The copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: The output components (2) are connected to each other via a second connection structure, wherein the second connection structure comprises a second connection pin (201) provided on a portion of the output copper sheet and a second connection hole (202) provided on another portion of the output copper sheet, wherein the second connection pin (201) is inserted into the corresponding second connection hole (202).

5. The copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: The input component (1) and the output component (2) further include a plurality of third connection pins (103), wherein the third connection pins (103) are used for electrically connecting to a PCB board.

6. The copper sheet multi-winding high-power planar transformer according to claim 3, characterized in that: The input component (1) further comprises a fourth connecting pin (104), wherein the fourth connecting pin (104) is electrically connected via the first pin (7).

7. The copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: It also comprises a plurality of second pins (8), and a third connection hole (203) for plugging with the second pins (8) is arranged on part of the output copper sheet of the output component (2).

8. The copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: A magnetic core tape (6) is arranged on the outer periphery of the magnetic core, and a heat-conducting double-sided adhesive tape (5) is arranged on the top of the magnetic core tape (6).

9. The copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: The cross-sectional shape of the magnetic core column (301) is circular, rectangular or elliptical.

10. The copper sheet multi-winding high-power planar transformer according to claim 1, characterized in that: Insulating sheets are provided on the upper and lower sides of the input copper sheet and the output copper sheet.

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