CN216353719U - Transformer and electronic equipment - Google Patents
Transformer and electronic equipment Download PDFInfo
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- CN216353719U CN216353719U CN202122977631.7U CN202122977631U CN216353719U CN 216353719 U CN216353719 U CN 216353719U CN 202122977631 U CN202122977631 U CN 202122977631U CN 216353719 U CN216353719 U CN 216353719U
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Abstract
The application provides a transformer and electronic equipment relates to the transformer field. This transformer includes skeleton and magnetic core, and the magnetic core is provided with first center pillar and second center pillar including the end yoke and the top yoke that the symmetry set up on the end yoke, and the symmetry is provided with third center pillar and fourth center pillar on the top yoke, and first center pillar and third center pillar support each other and lean on, form main center pillar, are provided with the air gap between second center pillar and fourth center pillar, form inferior center pillar, and the skeleton includes first winding and second winding, and first winding encircles and sets up in the main center pillar outside, and the second winding encircles and sets up in the first winding and the inferior center pillar outside. The magnetic flux of the second winding can be reduced, the aim of increasing leakage inductance is achieved, and the size of the leakage inductance can be changed by adjusting the size of the cross section area of the secondary post and the size of the air gap. The application provides a transformer simple structure has reduced the material cost of magnetic core and the processing cost of transformer.
Description
Technical Field
The utility model relates to the field of transformers, in particular to a transformer and electronic equipment.
Background
A transformer is an electronic component that is often used in various electrical devices, and a conventional transformer includes a primary winding coil and a secondary winding coil spaced apart from the primary winding coil, and the primary winding coil and the secondary winding coil generate an electromagnetic coupling effect through an iron core, thereby converting a voltage.
When an alternating current is applied to the primary winding, an alternating magnetic flux is generated in the transformer core, and an induced voltage (or current) is present in the secondary winding. According to the working condition of the transformer, the leakage inductance of the transformer sometimes needs to be adjusted, in a high-frequency switching power supply circuit, particularly a transformer in an LLC resonant network in a resonant topological circuit, the leakage inductance value of the transformer needs to be adjusted to a proper size so as to generate resonance by matching with circuit parameters, because the leakage inductance value of the transformer has almost no accurate calculation formula, the shape of a magnetic core of the transformer is fixed, the leakage inductance parameters of the transformer need to be adjusted, and the leakage inductance adjusting mode in the prior art has a complex structure and high material and production costs.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to provide a transformer and an electronic device which at least partially solve the above problems.
The embodiment of the utility model is realized by the following steps:
in a first aspect, the present application provides a transformer comprising a bobbin and a magnetic core;
the framework is used for fixing the magnetic core;
the magnetic core comprises a bottom yoke and a top yoke which are symmetrically arranged, a first middle column and a second middle column are arranged on the bottom yoke, and a third middle column and a fourth middle column are symmetrically arranged on the top yoke;
the first center pillar and the third center pillar are abutted against each other to form a main center pillar;
an air gap is arranged between the second center pillar and the fourth center pillar to form a secondary center pillar;
the skeleton includes first winding and second winding, first winding encircle set up in the main center pillar outside, the second winding encircle set up in first winding with the time center pillar outside.
Optionally, both sides of the bottom yoke and the top yoke are provided with a first side column and a second side column, and the first side column and the second side column are symmetrically arranged.
Optionally, the sum of the cross-sectional areas of the first side column, the second side column and the secondary central column is larger than the cross-sectional area of the primary central column.
Optionally, the bobbin includes a first bobbin and a second bobbin, the first winding is disposed on the first bobbin, and the second winding is disposed on the second bobbin;
the first framework is provided with a first main through hole and a first secondary through hole, and the second framework is provided with a second main through hole and a second secondary through hole;
the first main through hole and the second main through hole are used for fixing the main center pillar;
the first secondary through hole and the second secondary through hole are used for fixing the secondary central pillar.
Optionally, a top plate is further arranged on the second framework, and the top plate is connected with the second winding;
a limiting groove is formed in the top plate, and a third main through hole corresponding to the second main through hole and a third through hole corresponding to the second secondary through hole are formed in the limiting groove;
the limiting groove is used for fixing the top yoke;
the main center pillar penetrates through the third main through hole, and the secondary center pillar penetrates through the third secondary through hole.
Optionally, the first framework is provided with two bases, the bases are arranged on the first framework and on two sides of the first side column and two sides of the second side column, and one side, far away from the magnetic core, of the base is provided with a lead terminal.
Optionally, the first framework further comprises an outgoing line, the outgoing line is connected with the first winding, an outgoing line slot is arranged on the base, and the outgoing line slot is used for fixing the outgoing line.
Optionally, the first framework further comprises a first winding protection sleeve, the first framework is provided with a protection sleeve embedding groove, and the first winding protection sleeve is connected with the protection sleeve embedding groove and used for protecting the first winding.
Optionally, the first framework is provided with an embedding protrusion, the second framework is provided with an embedding groove at a position corresponding to the first framework, and the embedding protrusion is embedded with the embedding groove and used for fixing the first framework and the second framework.
In a second aspect, the present application further provides an electronic device comprising the transformer.
The embodiment of the utility model has the beneficial effects that:
the application provides a transformer and electronic equipment, this transformer includes skeleton and magnetic core, the skeleton is used for fixed magnetic core, the magnetic core is including the end yoke and the top yoke that the symmetry set up, be provided with first center pillar and second center pillar on the end yoke, the symmetry is provided with third center pillar and fourth center pillar on the top yoke, first center pillar and third center pillar support each other and lean on, form main center pillar, be provided with the air gap between second center pillar and fourth center pillar, form inferior center pillar, the skeleton includes first winding and second winding, first winding encircles and sets up in the main center pillar outside, the second winding encircles and sets up in the first winding and the inferior center pillar outside. In the application, the main magnetic flux part of the first winding generated by the main central column directly returns to the magnetic circuit of the main central column through the secondary central column, so that the magnetic flux of the second winding is reduced, the aim of increasing leakage inductance is achieved, in addition, a certain air gap is formed in the secondary central column, the magnetic flux of the secondary central column can be adjusted by changing the cross sectional area size and the air gap size of the secondary central column, and the leakage inductance size is changed. The application provides a transformer simple structure has reduced the material cost of magnetic core and the processing cost of transformer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1a is one of schematic structural views of a transformer according to an embodiment of the present invention;
fig. 1b is a second schematic structural view of a transformer according to an embodiment of the present invention;
fig. 2 is an exploded view of a transformer according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a magnetic core according to an embodiment of the present invention;
fig. 4a is one of schematic structural views of a first framework according to an embodiment of the present invention;
fig. 4b is a second schematic structural view of the first framework according to the embodiment of the present invention;
FIG. 5a is a schematic structural diagram of a second frame according to an embodiment of the present invention;
fig. 5b is a second schematic structural view of a second framework according to an embodiment of the present invention;
fig. 6 is a second schematic diagram illustrating an explosion structure of a transformer according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a first winding protection cover according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a winding circuit of a transformer according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a magnetic circuit of a transformer according to an embodiment of the present invention.
100-transformer; 10-a magnetic core; 20-a backbone; 110-top yoke; 120-bottom yoke; 130-a first king post; 140-a second king post; 150-a third center pillar; 210 — a first winding; 220-a second winding; 230-a first skeleton; 240-a second skeleton; 160-a first side post; 170-second side column; 2310-a base; 250-a top plate; 2320-first winding protection sleeve; 2130-fitting projections; 2140-a fitting groove.
Detailed Description
As described in the background art, in a high-frequency switching power supply circuit, particularly a transformer in an LLC resonant network in a resonant topology circuit, a leakage inductance value thereof needs to be adjusted to a proper value so as to generate resonance in cooperation with circuit parameters.
The problems existing in the prior art are all the results obtained after the inventor practices and researches, so that the discovery process of the problems and the solution proposed by the embodiment of the utility model in the following for the problems are all the contributions of the inventor in the utility model process.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
Referring to fig. 1a, 1b and 2 in combination, an embodiment of the present invention provides a transformer 100, where the transformer 100 includes a bobbin 20 and a magnetic core 10, the bobbin 20 is used to fix the magnetic core 10, the magnetic core 10 includes a bottom yoke 120 and a top yoke 110, the bottom yoke 120 is provided with a first center pillar 130 and a second center pillar 140, the top yoke 110 is provided with a third center pillar 150 and a fourth center pillar (not shown), the first center pillar 130 and the third center pillar 150 abut against each other to form a main center pillar, an air gap is provided between the second center pillar 140 and the fourth center pillar to form a secondary center pillar, the bobbin 20 includes a first winding 210 and a second winding 220, the first winding 210 is disposed around the main center pillar, and the second winding 220 is disposed around the first winding 210 and the secondary center pillar.
In this embodiment, the first winding 210 is disposed around the outer side of the main center pillar, the second winding 220 is disposed around the outer side of the first winding 210 and the sub center pillar, that is, the sub center pillar is disposed outside the first winding 210 and inside the second winding 220, the main magnetic flux generated by the first winding 210 in the main center pillar passes through the sub center pillar and directly returns to the magnetic path of the main center pillar, thereby reducing the magnetic flux of the second winding 220 and achieving the purpose of increasing leakage inductance.
The application provides a transformer simple structure has reduced the material cost of magnetic core and the processing cost of transformer.
In this embodiment, the main center pillar may be a polygonal pillar such as a circular, oval, or square pillar, and in this embodiment, a rounded rectangular pillar is preferred. The secondary central pillar may also be a polygonal cylinder such as a circular, oval, or square, and in this embodiment, a minor arc cylinder is preferred, and the secondary central pillar is located on the side where the fillet of the primary central pillar is located.
Alternatively, the core 10 may be made of a soft magnetic ferrite material, in this embodiment a power ferrite material is preferred.
In another alternative embodiment, the backbone 20 is an insulating material, preferably a thermosetting phenolic resin, and is injection molded with a mold.
Referring to fig. 3, in another alternative embodiment, the first side column 160 and the second side column 170 are disposed on both sides of the bottom yoke 120 and the top yoke 110, and the first side column 160 and the second side column 170 are symmetrically disposed.
In the present embodiment, the first side pillar 160 and the second side pillar 170 are symmetrically disposed on both sides of the bottom yoke 120, the first side pillar 160 and the second side pillar 170 are disposed on both sides parallel to the central point of the main center pillar and the sub center pillar, similarly, the first side pillar 160 and the second side pillar 170 are also disposed on both sides of the top yoke 110 corresponding to the bottom yoke 120, the first side pillar 160 on the top yoke 110 and the first side pillar 160 on the bottom yoke 120 abut against each other, and the second side pillar 170 on the top yoke 110 and the second side pillar 170 on the bottom yoke 120 abut against each other.
Optionally, the sum of the cross-sectional areas of the first side post 160, the second side post 170, and the secondary central post is greater than the cross-sectional area of the primary central post.
Referring to fig. 4a to 5b, in another alternative embodiment, the bobbin 20 includes a first bobbin 230 and a second bobbin 240, the first winding 210 is disposed on the first bobbin 230, and the second winding 220 is disposed on the second bobbin 240.
The first frame 230 is provided with a first main through hole and a first sub-through hole, and the second frame 240 is provided with a second main through hole and a second sub-through hole.
The first main through hole and the second main through hole are used for fixing the main center pillar, and the first secondary through hole and the second secondary through hole are used for fixing the secondary center pillar.
In the present embodiment, the bottom yoke 120, the first frame 230, the second frame 240 and the top yoke 110 are sequentially disposed, the main center pillar and the sub center pillar respectively pass through the through holes correspondingly disposed on the first frame 230 and the second frame 240 and are fixed in the frame 20, the first winding 210 is disposed around the main center pillar, and the second winding 220 is disposed around the first winding 210 and the sub center pillar.
In another alternative embodiment, the second bobbin 240 further includes a top plate 250, and the top plate 250 is connected to the second winding 220.
A limiting groove is formed in the top plate 250, and a third main through hole corresponding to the second main through hole and a third through hole corresponding to the second through hole are formed in the limiting groove.
The stopper groove is used to fix the top yoke 110.
The main center pillar passes through the third main through hole, and the secondary center pillar passes through the third through hole.
Specifically, the top plate 250 is positioned above the second winding 220, the top plate 250 is provided with through holes and stopper grooves corresponding to the main center leg and the sub center leg, and the top yoke 110 is connected to the top plate 250 through the through holes and the stopper grooves.
In another alternative embodiment, two bases 2310 are disposed on the first frame 230, the bases 2310 are disposed on two sides of the first frame 230 perpendicular to the first side pillar 160 and the second side pillar 170, and a lead terminal is disposed on a side of the base 2310 away from the magnetic core 10.
It should be noted that, in this embodiment, the lead terminals may be bent and have a shape similar to a "crab foot", so that the height of the transformer 100 may be effectively reduced.
In an alternative embodiment, the first bobbin 230 further includes a lead line connected to the first winding 210, and the base 2310 is provided with a lead line groove for fixing the lead line.
The lead wire can be hidden in the lead wire groove, so that the interference of the lead wire to the assembly when the first framework 230 and the second framework 240 are assembled can be effectively prevented.
Referring to fig. 6 and 7, in another alternative embodiment, the first bobbin 230 further includes a first winding protection sleeve 2320, the first bobbin 230 is provided with a protection sleeve engagement groove 2140, and the first winding protection sleeve 2320 is connected to the protection sleeve engagement groove 2140 for protecting the first winding 210.
In another alternative embodiment, the first frame 230 is provided with a fitting protrusion 2130, the second frame 240 is provided with a fitting groove 2140 at a corresponding position, and the fitting protrusion 2130 is fitted with the fitting groove 2140 to fix the first frame 230 and the second frame 240.
It should be noted that, in this embodiment, two opposite sides of the first frame 230 are respectively provided with two engaging protrusions 2130, that is, four engaging protrusions 2130 in total, the four engaging protrusions 2130 are located near four corners of the first frame 230, and an engaging groove 2140 is provided at a position corresponding to the engaging protrusions 2130 provided on the second frame 240 and the first frame 230, and in the installation process, the engaging protrusions 2130 and the engaging groove 2140 can be engaged by pressing the first frame 230 and the second frame 240, so as to fix the first frame 230 and the second frame 240.
In another alternative embodiment, four bump platforms are disposed at four corner sides of the second frame 240 for supporting the transformer 100 after the transformer 100 is mounted on the PCB board in a sunken manner, so as to increase the mechanical strength of the transformer 100.
The embodiment of the application also provides an electronic device, which comprises the transformer 100.
Referring to fig. 8 and fig. 9, in order to better understand the technical solution provided by the present application, the following provides a detailed description of the magnetic flux principle of the transformer 100 provided by the embodiment of the present application.
In this embodiment, the first winding 210 is wound around the main center post, when an alternating current is applied to the first winding 210, a magnetic flux Φ 1 is generated, Φ 1 passes through the magnetic core 10 top yoke 110 to the first side post 160 (the magnetic flux is Φ 11), the secondary center post (the magnetic flux is Φ 12), and the second side post 170 (the magnetic flux is Φ 13), and then returns to the main center post through the bottom yoke 120, and the total magnetic flux of the first winding 210 is Φ 1 ═ 11+ Φ 12+ Φ 13. Since the main center leg is located in all windings, the sub center leg is located between the first winding 210 and the second winding 220. Therefore, the magnetic flux Φ 12 flowing through the secondary center pole directly returns to the main magnetic path of the main center pole, and the magnetic flux of the second winding 220 at this time is only Φ 11+ Φ 13. And the magnetic flux of the second winding 220 can be changed by changing the area of the secondary post and the size of the air gap, thereby changing the magnitude of the leakage inductance.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A transformer, comprising a bobbin and a magnetic core;
the framework is used for fixing the magnetic core;
the magnetic core comprises a bottom yoke and a top yoke which are symmetrically arranged, a first middle column and a second middle column are arranged on the bottom yoke, and a third middle column and a fourth middle column are symmetrically arranged on the top yoke;
the first center pillar and the third center pillar are abutted against each other to form a main center pillar;
an air gap is arranged between the second center pillar and the fourth center pillar to form a secondary center pillar;
the skeleton includes first winding and second winding, first winding encircle set up in the main center pillar outside, the second winding encircle set up in first winding with the time center pillar outside.
2. The transformer of claim 1, wherein the bottom yoke and the top yoke are provided with a first side leg and a second side leg on both sides thereof, and the first side leg and the second side leg are symmetrically arranged.
3. The transformer of claim 2, wherein a sum of cross-sectional areas of the first side leg, the second side leg, and the secondary leg is greater than a cross-sectional area of the primary leg.
4. The transformer of claim 2, wherein the bobbin comprises a first bobbin and a second bobbin, the first winding disposed on the first bobbin, the second winding disposed on the second bobbin;
the first framework is provided with a first main through hole and a first secondary through hole, and the second framework is provided with a second main through hole and a second secondary through hole;
the first main through hole and the second main through hole are used for fixing the main center pillar;
the first secondary through hole and the second secondary through hole are used for fixing the secondary central pillar.
5. The transformer of claim 4, wherein a top plate is further disposed on the second bobbin, and the top plate is connected to the second winding;
a limiting groove is formed in the top plate, and a third main through hole corresponding to the second main through hole and a third through hole corresponding to the second secondary through hole are formed in the limiting groove;
the limiting groove is used for fixing the top yoke;
the main center pillar penetrates through the third main through hole, and the secondary center pillar penetrates through the third secondary through hole.
6. The transformer of claim 4, wherein two bases are disposed on the first bobbin, the bases are disposed on two sides of the first bobbin perpendicular to the first side column and the second side column, and a lead terminal is disposed on a side of the base away from the magnetic core.
7. The transformer of claim 6, wherein the first bobbin further comprises an outgoing line connected to the first winding, and the base is provided with an outgoing line groove for fixing the outgoing line.
8. The transformer of claim 4, wherein the first bobbin further comprises a first winding protection sleeve, and a protection sleeve engagement groove is formed in the first bobbin, and the first winding protection sleeve is connected with the protection sleeve engagement groove and used for protecting the first winding.
9. The transformer of claim 4, wherein the first bobbin is provided with a fitting protrusion, the second bobbin is provided with a fitting groove at a corresponding position, and the fitting protrusion is fitted with the fitting groove for fixing the first bobbin and the second bobbin.
10. An electronic device, characterized in that it comprises a transformer according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122977631.7U CN216353719U (en) | 2021-11-30 | 2021-11-30 | Transformer and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122977631.7U CN216353719U (en) | 2021-11-30 | 2021-11-30 | Transformer and electronic equipment |
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| Publication Number | Publication Date |
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| CN216353719U true CN216353719U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122977631.7U Active CN216353719U (en) | 2021-11-30 | 2021-11-30 | Transformer and electronic equipment |
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| CN (1) | CN216353719U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155134A (en) * | 2023-09-15 | 2023-12-01 | 湖南工程学院 | Interleaved LLC power supply synchronous rectification assembly |
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2021
- 2021-11-30 CN CN202122977631.7U patent/CN216353719U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155134A (en) * | 2023-09-15 | 2023-12-01 | 湖南工程学院 | Interleaved LLC power supply synchronous rectification assembly |
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