CN211428000U - High-frequency transformer for switching power supply and switching power supply - Google Patents
High-frequency transformer for switching power supply and switching power supply Download PDFInfo
- Publication number
- CN211428000U CN211428000U CN201922305020.0U CN201922305020U CN211428000U CN 211428000 U CN211428000 U CN 211428000U CN 201922305020 U CN201922305020 U CN 201922305020U CN 211428000 U CN211428000 U CN 211428000U
- Authority
- CN
- China
- Prior art keywords
- frequency transformer
- power supply
- switching power
- copper foil
- magnetic core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000011889 copper foil Substances 0.000 claims abstract description 54
- 229910052802 copper Inorganic materials 0.000 claims abstract description 27
- 239000010949 copper Substances 0.000 claims abstract description 27
- 210000001503 joint Anatomy 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 11
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Dc-Dc Converters (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The application discloses a high frequency transformer and switching power supply for switching power supply has set gradually from inside to outside in this high frequency transformer: the device comprises a magnetic core, a primary lead, a plurality of secondary overcurrent flat copper foils, an insulating copper strip and a PCB. The magnetic core sets up in high frequency transformer's inlayer, elementary wire and a plurality of secondary overflow the flat copper foil and set up in the magnetic core outside, the plane parallel arrangement of a plurality of secondary overflow the flat copper foil, the plane that arbitrary secondary overflowed the flat copper foil is perpendicular with the magnetic core axis, elementary wire layering coiling overflows between the flat copper foil at a plurality of secondary, the outlet wire connection PCB board of a plurality of secondary overflow the flat copper foil, the butt joint air gap formation short circuit ring of insulating copper strips parcel magnetic core is fixed in on the PCB board, the PCB board is used for exporting secondary current and carries out the refluence and arranges. The switching power supply comprises the high-frequency transformer. Through the application, the size of the high-frequency transformer can be reduced, the power density of the high-frequency transformer and the switching power supply is improved, and the stray flux is reduced.
Description
Technical Field
The application relates to the technical field of server high-frequency transformers, in particular to a high-frequency transformer for a switching power supply and the switching power supply.
Background
The switching power supply is a common power supply system in various power supply devices, a high-frequency transformer in the switching power supply is a core component, and how to design the high-frequency transformer to improve the reliability of the high-frequency transformer, so that the performance of the switching power supply is improved.
The high-frequency transformer in the present switching power supply mainly includes: magnetic core, primary coil, secondary coil and skeleton. The connection between the outgoing lines of the primary coil and the secondary coil adopts a welding wiring mode, the primary coil and the secondary coil adopt a copper wire winding structure, and a shielding copper strip is not arranged at the interface of the magnetic core.
However, the high frequency transformer in the current switching power supply is limited by the electrical characteristics, and the secondary coil wound by the copper wire makes the volume of the high frequency transformer larger, resulting in lower power density of the transformer. Because no shielding copper belt is arranged at the interface of the magnetic core, the air gap of the transformer can generate a magnetic dispersion phenomenon under the high-frequency action, so that the magnetic dispersion flux of the high-frequency transformer is higher.
SUMMERY OF THE UTILITY MODEL
The application provides a high-frequency transformer and a switching power supply for the switching power supply to solve the problems that the power density of the high-frequency transformer is low and the scattered magnetic flux is high in the prior art.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
a high frequency transformer for a switching power supply, the high frequency transformer comprising, arranged in sequence from the inside to the outside: magnetic core, elementary wire, a plurality of secondary overflow flat copper foil, insulating copper strips and PCB (Printed Circuit Board) Board, the magnetic core sets up in high frequency transformer's inlayer, and elementary wire and a plurality of secondary overflow flat copper foil and set up in the magnetic core outside, and a plurality of secondary overflow flat copper foil's plane parallel arrangement, arbitrary secondary overflows flat copper foil's plane and magnetic core axis is perpendicular, elementary wire layering coiling overflows between flat copper foil at a plurality of secondary, and a plurality of secondary overflow flat copper foil's the connection of being qualified for the next round of competitions the PCB Board, the butt joint air gap of insulating copper strips parcel magnetic core forms the short Circuit ring and is fixed in on the PCB Board, the PCB Board is used for exporting secondary current and carries out the refluence and arranges.
Optionally, the magnetic core comprises: an EE type core, an RM type core, and a PQ type core.
Optionally, the number of the secondary flow flat copper foil is 8.
Optionally, the primary conductor comprises: copper wire, aluminum wire or alloy wire.
Optionally, the insulated copper strip comprises: the copper foil comprises a flat copper foil and an insulating outer layer, wherein the insulating outer layer wraps the flat copper foil.
Optionally, the specification of the insulating copper strip is: the length is 3 times the height of the magnetic core and the width is 2 mm.
A switching power supply comprising a high frequency transformer for a switching power supply as described in any one of the preceding claims.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the application provides a high frequency transformer for switching power supply, has set gradually from inside to outside in this high frequency transformer: the device comprises a magnetic core, a primary lead, a plurality of secondary overcurrent flat copper foils, an insulating copper strip and a PCB. The magnetic core is arranged at the innermost layer of the high-frequency transformer, the primary lead and the secondary overflowing flat copper foils are arranged outside the magnetic core, the planes of the secondary overflowing flat copper foils are arranged in parallel, the plane of any secondary overflowing flat copper foil is perpendicular to the central axis of the magnetic core, the primary lead is wound among the secondary overflowing flat copper foils in a layered mode, outgoing lines of the secondary overflowing flat copper foils are connected with a PCB, an insulating copper strip wraps a butt joint air gap of the magnetic core to form a short circuit ring and is fixed on the PCB, and the PCB is used for outputting secondary current and conducting backflow arrangement. In the embodiment, the secondary overcurrent flat copper foil is adopted to replace a secondary coil wound by a traditional copper wire, and the primary lead is wound among the plurality of secondary overcurrent flat copper foils in a layered manner, so that the volume of the high-frequency transformer can be greatly reduced, and the power density of the high-frequency transformer is improved. Due to the fact that the insulating copper strip is arranged around the air gap of the magnetic core, scattered magnetic flux of the high-frequency transformer can be effectively reduced, EMI interference is reduced, and loss is reduced.
The application also provides a switching power supply, wherein the high-frequency transformer is arranged in the switching power supply. Due to the arrangement of the high-frequency transformer, the high-frequency transformer is small in size and saves space, so that the space layout of the switching power supply is more reasonable, and the power density is higher. And the high-frequency transformer has lower stray magnetic flux, is beneficial to reducing interference, improving loss and further improving the performance of the switching power supply.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-frequency transformer for a switching power supply according to an embodiment of the present disclosure;
FIG. 2a is a front view of a high frequency transformer in an embodiment of the present application;
FIG. 2b is a top view of the high frequency transformer in the embodiment of the present application;
FIG. 2c is a side view of a high frequency transformer in an embodiment of the present application;
fig. 3 is a schematic structural view of a secondary overcurrent flat copper foil in the embodiment of the present application.
The symbols represent: a represents an insulated copper strip, B represents a magnetic core, C represents a secondary overcurrent flat copper foil, and D represents a PCB.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
For a better understanding of the present application, embodiments of the present application are explained in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a high-frequency transformer for a switching power supply according to an embodiment of the present disclosure. As can be seen from fig. 1, the high-frequency transformer of the present embodiment is sequentially provided with, from inside to outside: the device comprises a magnetic core, a primary lead, a plurality of secondary overcurrent flat copper foils, an insulating copper strip and a PCB. The magnetic core is arranged on the innermost layer of the high-frequency transformer, the primary conducting wire and the secondary overcurrent flat copper foils are arranged outside the magnetic core, and the primary conducting wire and the secondary overcurrent flat copper foils are wrapped on the magnetic core. The planes of the secondary overcurrent flat copper foils are arranged in parallel, the plane of any secondary overcurrent flat copper foil is perpendicular to the central axis of the magnetic core, the primary conducting wires are wound among the secondary overcurrent flat copper foils in a layered mode, outgoing lines of the secondary overcurrent flat copper foils are connected with the PCB, the insulating copper strips wrap butt joint air gaps of the magnetic core to form short circuit rings and are fixed on the PCB, and the PCB is used for outputting secondary current and conducting backflow arrangement.
The core of the high-frequency transformer of the present embodiment includes an EE type core, an RM type core, a PQ type core, and the like. Taking the EE-type core as an example, the front view, the top view and the side view of the high-frequency transformer in this embodiment are respectively shown in fig. 2a-2 c. Wherein, A represents an insulating copper strip, B represents a magnetic core, C represents a secondary overcurrent flat copper foil, and D represents a PCB. The primary conductor is inside the core and the three views cannot be shown.
The structural schematic diagram of the secondary overcurrent flat copper foil in this embodiment is shown in fig. 3. This embodiment adopts secondary flat copper foil to replace the secondary coil of traditional copper line coiling, and the layering coiling of elementary wire is crossed between flat copper foil at a plurality of secondaries, and this kind of structural design can reduce high frequency transformer's volume greatly to improve high frequency transformer's power density.
The number of the secondary overcurrent flat copper foils is determined according to parameters such as power, output current and output voltage of the high-frequency transformer required in practice. The number of the secondary overflowing flat copper foil can be generally selected to be 8, that is, 8 parallel secondary overflowing flat copper foils can be adopted.
In this embodiment, the primary wire may be a copper wire, or an aluminum wire or an alloy wire. By adopting the copper winding, the high-frequency transformer can meet good heat resistance and safety performance and improve the conductivity, thereby improving the performance and the working efficiency of the high-frequency transformer. The aluminum wire or the alloy wire is adopted, so that the weight can be reduced, and the cost of the high-frequency transformer can be reduced.
In order to achieve a better hysteresis loop when the high-frequency transformer operates, a processing method of adding an air gap is generally adopted. Taking the EE-type magnetic core as an example, usually, an air gap is added at the interface of the EE-type magnetic core by adopting a dispensing or heightening mode, and the resistivity of the magnetic core is increased through the air gap, so that a better hysteresis loop is achieved. However, the presence of the air gap causes additional stray flux and causes additional losses. In this embodiment, through set up insulating copper strips in high frequency transformer, this insulating copper strips arranges around the air gap of magnetic core, it is fixed finally through the PCB board, make the air gap wrap up through insulating copper strips, form the loop of a short circuit in the periphery of magnetic core edge post, short circuit ring for short, when the magnetic core launches any magnetic flux to the external world, if link with external short circuit ring, can form certain electric current in this short circuit ring, this electric current can absorb, shield leakage magnetic flux, reduce the leakage magnetic flux that the air gap produced, thereby avoid or reduce the electrical interference that leakage magnetic flux caused other devices, like EMI disturbs, and then reduce the loss, improve high frequency transformer's consumption.
The insulating copper strip in this embodiment includes: the copper foil comprises a flat copper foil and an insulating outer layer, wherein the insulating outer layer wraps the flat copper foil. The insulating outer layer can adopt insulating plastic.
The specification of the insulating copper strip can adopt: the length is 3 times the height of the magnetic core and the width is 2 mm. The length and width are determined according to the parameters of a specific high-frequency transformer, and the length of the insulated copper strip generally needs to satisfy the following requirements: can wrap a turn of high-frequency transformer coil, and the height of the magnetic core is 3 times. The length is moderate, the high-frequency transformer can be wrapped, the size of the high-frequency transformer can be saved, the power density is improved, overlong length can be avoided, and cost reduction is facilitated.
The PCB in this embodiment is used to output a secondary current of the secondary overcurrent flat copper foil and perform backflow arrangement, a specific PCB routing structure is determined according to power topology, current size, and space structure requirements of the high-frequency transformer, and the routing method is designed by a volt-second product method in the prior art. The power supply topology type can adopt LLC power supply topology and the like.
The PCB is arranged in a backflow mode, so that the heat dissipation effect and the overcurrent capacity of the high-frequency transformer can be greatly improved, and the performance of the high-frequency transformer is effectively improved. Meanwhile, the circuit board is adopted for backflow, so that the size of the high-frequency transformer can be effectively reduced, and the power density of the high-frequency transformer is improved.
The application also provides a switching power supply, wherein the high-frequency transformer is arranged in the switching power supply. Due to the arrangement of the high-frequency transformer, the power density of the switching power supply is effectively improved, and the anti-jamming capability of the switching power supply is greatly enhanced due to the fact that the high-frequency transformer is low in magnetic flux dissipation, and the working efficiency of the switching power supply is improved.
The foregoing are merely exemplary embodiments of the present application and are presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A high-frequency transformer for a switching power supply, characterized in that it comprises, arranged in sequence from the inside to the outside: magnetic core, elementary wire, a plurality of secondary overflow flat copper foil, insulating copper strips and PCB board, the magnetic core sets up in high frequency transformer's inlayer, and elementary wire and a plurality of secondary overflow flat copper foil set up in the magnetic core outside, and a plurality of secondary overflow flat copper foil's plane parallel arrangement, arbitrary the plane that the secondary overflowed flat copper foil is perpendicular with the magnetic core axis, elementary wire layering coiling overflows between the flat copper foil at a plurality of secondary, and a plurality of secondary overflow flat copper foil's the connection of being qualified for the next round of competitions PCB board, the butt joint air gap of insulating copper strips parcel magnetic core forms the short circuit ring and is fixed in on the PCB board, the PCB board is used for exporting secondary current and carries out the refl.
2. A high-frequency transformer for a switching power supply according to claim 1, wherein said magnetic core comprises: an EE type core, an RM type core, and a PQ type core.
3. The high-frequency transformer for switching power supplies according to claim 1, wherein the number of the secondary overcurrent flat copper foil is 8.
4. A high-frequency transformer for a switching power supply according to claim 1, wherein said primary conductor comprises: copper wire, aluminum wire or alloy wire.
5. The high frequency transformer for a switching power supply according to claim 1, wherein said insulating copper tape comprises: the copper foil comprises a flat copper foil and an insulating outer layer, wherein the insulating outer layer wraps the flat copper foil.
6. The high frequency transformer for switching power supply according to claim 1, wherein said insulating copper tape has a specification of: the length is 3 times the height of the magnetic core and the width is 2 mm.
7. A switching power supply comprising a high frequency transformer for a switching power supply according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305020.0U CN211428000U (en) | 2019-12-20 | 2019-12-20 | High-frequency transformer for switching power supply and switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305020.0U CN211428000U (en) | 2019-12-20 | 2019-12-20 | High-frequency transformer for switching power supply and switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211428000U true CN211428000U (en) | 2020-09-04 |
Family
ID=72287874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922305020.0U Active CN211428000U (en) | 2019-12-20 | 2019-12-20 | High-frequency transformer for switching power supply and switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211428000U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112533110A (en) * | 2020-11-09 | 2021-03-19 | 张百良 | Damping short-circuit ring of electronic circuit |
-
2019
- 2019-12-20 CN CN201922305020.0U patent/CN211428000U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112533110A (en) * | 2020-11-09 | 2021-03-19 | 张百良 | Damping short-circuit ring of electronic circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10886054B2 (en) | High-voltage transformer and electronic power apparatus | |
| WO2020029664A1 (en) | Coil module, wireless charging transmission apparatus, receiving apparatus, system, and terminal | |
| WO2021031749A1 (en) | Solid-state transformer | |
| CN211428000U (en) | High-frequency transformer for switching power supply and switching power supply | |
| US11328857B2 (en) | High-voltage isolation withstand planar transformer and high-voltage insulation method thereof | |
| CN105051841A (en) | Magnetic device | |
| CN206532685U (en) | Anti-tampering LED transformers | |
| CN109585123A (en) | A kind of common-mode inductor and its production technology | |
| CN202695100U (en) | Structure of main transformer consisting of multiple transformers in inverse power supply | |
| CN204577235U (en) | Flat surface transformer | |
| EP4258303A1 (en) | Transformer | |
| CN209418169U (en) | The conducting wire of for transformer winding and a kind of transformer | |
| CN206819866U (en) | A kind of transformer | |
| CN207925284U (en) | A kind of resonant inductor | |
| CN201975242U (en) | Novel embedded reactor structure for high-capacity and high-impedance transformer | |
| CN206685252U (en) | A kind of supporting miniature transformer | |
| CN207637614U (en) | A kind of two-in-one package inductance transformer altogether | |
| US20220108829A1 (en) | Wire for use in transformer winding and transformer | |
| CN206250028U (en) | A kind of integrated high frequency transformer of single-phase high-power magnetic | |
| CN207233542U (en) | A kind of lead type band plastic shell transformer | |
| CN211507357U (en) | Inductor for shielding large-current power | |
| CN204668076U (en) | Common-mode inductor | |
| CN210575473U (en) | Transformer | |
| CN213519559U (en) | Shielding layer for planar transformer | |
| CN210403478U (en) | Anti-electromagnetic interference transformer framework |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |