CN216793444U - Flat transformer - Google Patents
Flat transformer Download PDFInfo
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- CN216793444U CN216793444U CN202220419809.8U CN202220419809U CN216793444U CN 216793444 U CN216793444 U CN 216793444U CN 202220419809 U CN202220419809 U CN 202220419809U CN 216793444 U CN216793444 U CN 216793444U
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Abstract
The utility model discloses a flat transformer, which relates to the technical field of transformers and comprises a PCB (printed circuit board) winding, a plurality of primary welding pins, a plurality of secondary welding pins, a first magnetic core and a second magnetic core, wherein the first magnetic core is connected with the second magnetic core; the first magnetic core and the second magnetic core are wrapped in the middle of the PCB winding to form a closed magnetic circuit, the plurality of primary welding pins are arranged at one end of the PCB winding at intervals, and the plurality of secondary welding pins are arranged at the other end of the PCB winding at intervals; adopt PCB circuit board winding, first magnetic core and second magnetic core, form closed magnetic circuit with first magnetic core and second magnetic core cladding in the intermediate position of PCB circuit board winding, wholly possess the function of vary voltage, this planar transformer simple structure, electronic components are few, have reduced manufacturing cost.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a flat-plate transformer.
Background
The transformer is widely applied to electronic products, and under the condition that power is generally supplied by a plurality of PCB boards in the power electronic industry, a main power supply module is adopted for supplying power, voltage is modulated and then output, and the voltage is distributed to each circuit unit through a wiring harness; the transformer in the traditional mode is characterized in that a primary coil and a secondary coil are wound by a framework, a pair of magnetic cores penetrates through the framework and is wound and fixed by an adhesive tape, and the transformer has the defects of complex manufacturing process, poor product consistency, poor coupling of the primary coil and the secondary coil, leakage inductance phenomenon of the transformer and short service life, so that a flat-plate transformer is urgently needed to be developed to meet the requirement of actual use aiming at the current situation.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to the defects in the prior art, and the main object of the present invention is to provide a planar transformer, in which a PCB winding, a first magnetic core and a second magnetic core are adopted, and the first magnetic core and the second magnetic core are wrapped at the middle position of the PCB winding to form a closed magnetic circuit, so that the planar transformer has a transformation function as a whole, and has a simple structure, fewer electronic components, and a reduced production cost.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a flat transformer comprises a PCB (printed circuit board) winding, a plurality of primary welding feet, a plurality of secondary welding feet, a first magnetic core and a second magnetic core, wherein the first magnetic core is connected with the second magnetic core; the first magnetic core and the second magnetic core are wrapped in the middle of the PCB winding to form a closed magnetic circuit, the plurality of primary welding pins are arranged at one end of the PCB winding at intervals, and the plurality of secondary welding pins are arranged at the other end of the PCB winding at intervals; the PCB circuit board winding comprises a primary winding and a secondary winding, the primary winding comprises a plurality of layers of primary circuit boards arranged in a laminated mode and primary coils printed on the primary circuit boards, the primary coils are connected with primary welding pins, and the primary coils on the plurality of layers of primary circuit boards are connected in series; the secondary winding comprises a plurality of groups of secondary circuit boards arranged in a laminated mode and a secondary coil printed on the secondary circuit boards, and the secondary coil is connected with the secondary welding pins; the plurality of secondary circuit boards arranged in a stacked mode are symmetrically arranged on two sides of the plurality of primary circuit boards arranged in a stacked mode, and the plurality of secondary circuit boards distributed on the same side of the primary circuit boards are distributed at intervals.
As a preferred embodiment: primary coils on each layer of primary circuit board are connected end to be connected in series; each group of secondary circuit boards comprises two layers of secondary circuit boards which are distributed in a laminated mode at intervals, secondary coils are correspondingly printed on the two layers of secondary circuit boards, and the secondary coils on the two layers of secondary circuit boards are connected in series end to end.
As a preferred scheme: the cross section of the first magnetic core is in a mountain shape, the first magnetic core comprises a magnetic frame and the magnetic column, the magnetic column is integrally connected to the middle position of the magnetic frame, the upper side wall of the magnetic frame is flush with the upper side wall of the magnetic column, the magnetic column is matched with the through hole, and the first magnetic core is coated on the lower surface of the PCB winding through the magnetic column; the second magnetic core is planar and is positioned on the upper surface of the PCB winding.
As a preferred embodiment: the first magnetic core is connected with the second magnetic core through the clamping hook.
As a preferred embodiment: the lateral walls of the first magnetic core and the second magnetic core are provided with grooves, clamping columns are arranged in the grooves, and semi-annular clamping hooks are arranged between the clamping columns of the first magnetic core and the clamping columns of the second magnetic column and are matched with the clamping columns.
As a preferred embodiment: the first magnetic core and the second magnetic core are connected through bonding.
As a preferred embodiment: the primary circuit board is four layers, and the four layers of circuit boards are distributed in a laminated mode; the secondary circuit boards are four groups, wherein two groups of secondary circuit boards are distributed on the left side of the four-layer primary circuit board in a laminated mode, and the other two groups of secondary circuit boards are distributed on the right side of the four-layer primary circuit board in a laminated mode.
As a preferred embodiment: the turn ratio of the primary coil to the secondary coil is 24/20 or 24/10.
Compared with the prior art, the flat-plate transformer has the obvious advantages and beneficial effects, and particularly, according to the technical scheme, the first magnetic core and the second magnetic core are coated in the middle of the PCB winding to form a closed magnetic circuit by adopting the PCB winding, the first magnetic core and the second magnetic core, so that the whole flat-plate transformer has a voltage transformation function, the structure is simple, the number of electronic components is small, and the production cost is reduced; different voltages can be supported by adopting a plurality of primary circuit boards arranged in a laminated manner and a plurality of groups of secondary circuit boards arranged in a laminated manner, so that the application range is wide; the primary coil is printed on the primary circuit board, the secondary coil is printed on the secondary circuit board, and compared with a flat-plate transformer in a traditional mode, the primary coil and the secondary coil are wound by utilizing the framework, the leakage inductance phenomenon of the flat-plate transformer is reduced, the loss degree of the flat-plate transformer is reduced, and the service life of the flat-plate transformer is prolonged.
To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic perspective view of a planar transformer (a first magnetic core and a second magnetic core are connected by bonding) according to the present invention;
FIG. 2 is an exploded view of a planar transformer (a first core and a second core are connected by bonding) according to the present invention;
FIG. 3 is a schematic perspective view of a planar transformer (a first magnetic core and a second magnetic core are connected by a hook) according to the present invention;
FIG. 4 is an exploded view of the planar transformer (the first core and the second core are connected by a hook) of the present invention;
fig. 5 is a schematic diagram of the distribution of the primary winding and the secondary winding according to the present invention.
The attached drawings indicate the following:
in the figure: 10. a PCB circuit board winding; 11. a through hole; 20. primary welding feet; 21. a secondary leg; 30. a first magnetic core; 31. a magnetic frame; 32. a magnetic column; 40. a second magnetic core; 41. a semi-annular hook; 42. a groove; 43. clamping the column; 50. a primary winding; 51. a primary circuit board; 52. a primary coil; 60. a secondary winding; 61. a secondary circuit board; 62. a secondary coil.
Detailed Description
As shown in fig. 1 to 5, a planar transformer of the present invention includes a PCB winding 10, a plurality of primary solder fillets 20, a plurality of secondary solder fillets 21, a first magnetic core 30 and a second magnetic core 40, wherein:
the first magnetic core 30 is connected with the second magnetic core 40, the middle part of the PCB winding 10 is provided with a through hole 11, the first magnetic core 30 is provided with a raised magnetic pillar 32, and the magnetic pillar 32 penetrates through the through hole 11; the first magnetic core 30 and the second magnetic core 40 are wrapped at the middle position of the PCB circuit board winding 10 for forming a closed magnetic circuit, the plurality of primary solder tails 20 are arranged at one end of the PCB circuit board winding 10 at intervals, and the plurality of secondary solder tails 21 are arranged at the other end of the PCB circuit winding at intervals; the PCB winding 10 comprises a primary winding 50 and a secondary winding 60, wherein the primary winding 50 comprises a plurality of layers of primary circuit boards 51 arranged in a stacked manner and primary coils 52 printed on the primary circuit boards 51, the primary coils 52 are connected with the primary solder feet 20, and the primary coils 52 on the plurality of layers of primary circuit boards 51 are connected in series; the secondary winding 60 includes a plurality of sets of secondary circuit boards 61 arranged in a stacked manner and a secondary coil 62 printed on the secondary circuit boards 61, and the secondary coil 62 is connected with the secondary solder feet 21; the plurality of sets of stacked secondary circuit boards 61 are symmetrically disposed on both sides of the plurality of stacked primary circuit boards 51, and the plurality of sets of secondary circuit boards 61 distributed on the same side of the primary circuit boards 51 are spaced apart.
The flat transformer has the advantages that the PCB winding 10, the first magnetic core 30 and the second magnetic core 40 are adopted, the first magnetic core 30 and the second magnetic core 40 are coated in the middle of the PCB winding 10 to form a closed magnetic circuit, the whole flat transformer has a voltage transformation function, the structure is simple, the number of electronic components is small, and the production cost is reduced; different voltages can be supported by adopting a plurality of primary circuit boards 51 arranged in a laminated manner and a plurality of groups of secondary circuit boards 61 arranged in a laminated manner, so that the application range is wide; the primary coil 52 is printed on the primary circuit board 51, the secondary coil 62 is printed on the secondary circuit board 61, and compared with a traditional flat-plate transformer which uses a framework to wind the primary coil 52 and the secondary coil 62, the leakage inductance phenomenon of the flat-plate transformer is reduced, the loss degree of the flat-plate transformer is reduced, and the service life of the flat-plate transformer is prolonged; the plurality of sets of secondary circuit boards 61 arranged in a laminated manner are symmetrically arranged on two sides of the plurality of primary circuit boards 51 arranged in a laminated manner, so that the magnetic flux of the magnetic core is completely utilized, and the heating is more uniform; the planar transformer can be attached to an external PCB and used as a power input end to convert external standard voltage into voltage required by the PCB, and then the voltage is rectified to provide power for the external PCB.
The primary coils 52 on the primary circuit boards 51 are connected end to end in series, each group of secondary circuit boards 61 comprises two layers of secondary circuit boards 61 distributed in a laminated manner at intervals, the secondary coils 62 are correspondingly printed on the two layers of secondary circuit boards 61, and the secondary coils 62 on the two layers of secondary circuit boards 61 are connected end to end in series; the design can meet the support of a large-capacity power supply, and compared with the power supply module chip popular in the market, the planar transformer has the characteristics of high integration degree, long service life and low production cost.
The cross section of the first magnetic core 30 is in a shape of a Chinese character 'shan', the first magnetic core 30 comprises a magnetic frame 31 and the magnetic column 32, the magnetic column 32 is integrally connected to the middle position of the magnetic frame 31, the upper side wall of the magnetic frame 31 is flush with the upper side wall of the magnetic column 32, the magnetic column 32 is matched with the through hole 11, and the first magnetic core 30 is wrapped on the lower surface of the PCB winding 10 through the magnetic column 32; the second magnetic core 40 is planar, and the second magnetic core 40 is located on the upper surface of the PCB winding 10; the first magnetic core 30 is connected with the second magnetic core 40, the magnetic pillar 32 is embedded in the through hole 11, and the outer side wall of the magnetic frame 31 is positioned outside the PCB winding 10.
The first magnetic core 30 is connected with the second magnetic core 40 through a clamping hook, the outer side walls of the first magnetic core 30 and the second magnetic core 40 are both provided with a groove 42, a clamping column 43 is arranged in the groove 42, a semi-annular clamping hook 41 is arranged between the clamping column 43 of the first magnetic core 30 and the clamping column 43 of the second magnetic column 32, and the semi-annular clamping hook 41 is matched with the clamping column 43; the two ends of the semi-annular hook 41 are respectively connected with the clamping column 43 of the first magnetic core 30 and the clamping column 43 of the second magnetic core 40, and the semi-annular hook 41 is used for connecting the first magnetic core 30 and the second magnetic core 40 together; the first core 30 and the second core 40 may also be connected by gluing.
The primary circuit board 51 has four layers, and the four layers of circuit boards are distributed in a laminated manner; the secondary circuit boards 61 are in groups of layers, wherein two groups of secondary circuit boards 61 are distributed on the left side of the four-layer primary circuit board 51 in a stacked manner, and the other two groups of secondary circuit boards 61 are distributed on the right side of the four-layer primary circuit board 51 in a stacked manner; the planar transformer can be provided with the layers of the primary circuit board 51 and the secondary circuit board 61 according to specific requirements, and is wide in application range.
The turns ratio of the primary coil 52 to the secondary coil 62 is 24/20 or 24/10; the external PCB can obtain stable required voltage.
The planar transformer has the advantages that the PCB winding, the first magnetic core and the second magnetic core are adopted, the first magnetic core and the second magnetic core are coated in the middle of the PCB winding to form a closed magnetic circuit, the whole planar transformer has a voltage transformation function, the structure is simple, the number of electronic components is small, and the production cost is reduced; different voltages can be supported by adopting a plurality of primary circuit boards arranged in a laminated manner and a plurality of groups of secondary circuit boards arranged in a laminated manner, so that the application range is wide; the primary coil is printed on the primary circuit board, the secondary coil is printed on the secondary circuit board, and compared with a flat-plate transformer in a traditional mode, the primary coil and the secondary coil are wound by utilizing the framework, the leakage inductance phenomenon of the flat-plate transformer is reduced, the loss degree of the flat-plate transformer is reduced, and the service life of the flat-plate transformer is prolonged.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (8)
1. A planar transformer, characterized by; the PCB comprises a PCB winding, a plurality of primary welding pins, a plurality of secondary welding pins, a first magnetic core and a second magnetic core, wherein the first magnetic core is connected with the second magnetic core; the first magnetic core and the second magnetic core are wrapped in the middle of the PCB winding to form a closed magnetic circuit, the plurality of primary welding pins are arranged at one end of the PCB winding at intervals, and the plurality of secondary welding pins are arranged at the other end of the PCB winding at intervals; the PCB circuit board winding comprises a primary winding and a secondary winding, the primary winding comprises a plurality of layers of primary circuit boards arranged in a laminated mode and primary coils printed on the primary circuit boards, the primary coils are connected with primary welding pins, and the primary coils on the plurality of layers of primary circuit boards are connected in series; the secondary winding comprises a plurality of groups of secondary circuit boards arranged in a laminated mode and a secondary coil printed on the secondary circuit boards, and the secondary coil is connected with the secondary welding pins; the plurality of secondary circuit boards arranged in a stacked mode are symmetrically arranged on two sides of the plurality of primary circuit boards arranged in a stacked mode, and the plurality of secondary circuit boards distributed on the same side of the primary circuit boards are distributed at intervals.
2. The planar transformer according to claim 1, wherein: primary coils on each layer of primary circuit board are connected end to be connected in series; each group of secondary circuit boards comprises two layers of secondary circuit boards which are distributed in a laminated mode at intervals, secondary coils are correspondingly printed on the two layers of secondary circuit boards, and the secondary coils on the two layers of secondary circuit boards are connected in series end to end.
3. The planar transformer according to claim 2, wherein: the cross section of the first magnetic core is in a mountain shape, the first magnetic core comprises a magnetic frame and the magnetic column, the magnetic column is integrally connected to the middle position of the magnetic frame, the upper side wall of the magnetic frame is flush with the upper side wall of the magnetic column, the magnetic column is matched with the through hole, and the first magnetic core is coated on the lower surface of the PCB winding through the magnetic column; the second magnetic core is planar and is positioned on the upper surface of the PCB winding.
4. The planar transformer according to claim 1, wherein: the first magnetic core is connected with the second magnetic core through the clamping hook.
5. The planar transformer according to claim 4, wherein: the lateral walls of the first magnetic core and the second magnetic core are provided with grooves, clamping columns are arranged in the grooves, and semi-annular clamping hooks are arranged between the clamping columns of the first magnetic core and the clamping columns of the second magnetic column and are matched with the clamping columns.
6. The planar transformer according to claim 1, wherein: the first magnetic core and the second magnetic core are connected through adhesion.
7. The planar transformer according to claim 1, wherein: the primary circuit board is four layers, and the four layers of circuit boards are distributed in a laminated mode; the secondary circuit boards are four groups, wherein two groups of secondary circuit boards are distributed on the left side of the four-layer primary circuit board in a laminated mode, and the other two groups of secondary circuit boards are distributed on the right side of the four-layer primary circuit board in a laminated mode.
8. The planar transformer according to claim 1, wherein: the turn ratio of the primary coil to the secondary coil is 24/20 or 24/10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220419809.8U CN216793444U (en) | 2022-02-25 | 2022-02-25 | Flat transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220419809.8U CN216793444U (en) | 2022-02-25 | 2022-02-25 | Flat transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216793444U true CN216793444U (en) | 2022-06-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220419809.8U Active CN216793444U (en) | 2022-02-25 | 2022-02-25 | Flat transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216793444U (en) |
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2022
- 2022-02-25 CN CN202220419809.8U patent/CN216793444U/en active Active
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