CN204066973U - Flat surface transformer - Google Patents
Flat surface transformer Download PDFInfo
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- CN204066973U CN204066973U CN201420470342.5U CN201420470342U CN204066973U CN 204066973 U CN204066973 U CN 204066973U CN 201420470342 U CN201420470342 U CN 201420470342U CN 204066973 U CN204066973 U CN 204066973U
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- side winding
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Abstract
The utility model discloses a kind of flat surface transformer, comprise magnetic core (10), former limit winding (40) and secondary assembly (20), described secondary assembly (20) comprises at least one secondary unit, each described secondary unit is included in the lower vice-side winding (2021) be coupled with described former limit winding (40) of described magnetic core (10) effect, electric current for producing described vice-side winding (2021) and the coupling of described former limit winding (40) carries out the rectification circuit plate (201) of rectification process, and for exporting the output of the electric current after rectification process, described rectification circuit plate (201) is connected with described vice-side winding (2021) and described output respectively, described former limit winding (40), vice-side winding (2021) winding are on described magnetic core (10).This flat surface transformer has the advantages such as output current is large, delivery efficiency is high.
Description
Technical field
The utility model relates to planar transformer technology field, particularly relates to a kind of flat surface transformer be applied on the PCB of power module.
Background technology
In the power supply of electronic equipment, conventional transformer is realized by many groups wire of being wrapped on magnetic core, occupies very large volume and efficiency is very low.Along with power module in recent years towards miniaturized, power density is high, the trend development of big current, uses traditional transformer to be difficult to meet the demands again.Meanwhile, the technology of various reduction power volume, raising power density is arisen at the historic moment, and planar transformer technology is one.Compared with conventional transformer, flat surface transformer not only has structural innate advantage, but also have that power density is higher, efficiency is higher, leakage inductance is extremely low, the better and low cost and other advantages of perfect heat-dissipating, EMC index.Flat surface transformer is very applicable to surface mount, is that electronic product realizes efficient, lightweight and the Primary Component of miniaturization.
In the flat surface transformer of current existence, circuit of synchronous rectification is integrated on power module PCB, and flat surface transformer flows in power module PCB after outputing current to circuit of synchronous rectification again.Flat surface transformer is long to the loop path in circuit of synchronous rectification, and high-frequency current delivery efficiency is low.
Utility model content
In view of above-mentioned defect, the utility model provides the flat surface transformer that a kind of high-frequency current delivery efficiency is high.A kind of flat surface transformer that the utility model provides, comprise magnetic core, former limit winding and secondary assembly, described secondary assembly comprises at least one secondary unit, each described secondary unit being included under described magnetic core effect with the vice-side winding of described former limit winding coupled, carrying out the rectification circuit plate of rectification process and the output for exporting the electric current after rectification process for the electric current produced described vice-side winding and described former limit winding coupled, and described rectification circuit plate is connected with described vice-side winding and described output respectively; Described former limit winding, vice-side winding winding are on described magnetic core.
By the mode of integrated synchronous rectification circuit and vice-side winding, vice-side winding and rectification circuit plate are integrated thus decreases the loop path of flat surface transformer to circuit of synchronous rectification, improve the delivery efficiency of high-frequency current, and save space, reduce loss and install simple.
Preferably, each described former limit winding is by the wrapped with insulation at least coil that turns to of one wire.This kind of mode, can meet the requirement of reinforced insulation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
The structural representation of the flat surface transformer that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the explosive view after Fig. 1 planar transformers is removed socket bus-bar and exported bus-bar;
Fig. 3 is the structural representation assembly drawing of the secondary unit of the first embodiment of secondary assembly in Fig. 2;
Fig. 4 is the structural representation of the secondary unit of the first embodiment of secondary assembly in Fig. 2;
Fig. 5 is the structural representation of magnetic core in Fig. 2.
Embodiment
The utility model passes through the mode of integrated synchronous rectification circuit and vice-side winding, vice-side winding and rectification circuit plate are integrated thus decreases the loop path of flat surface transformer to circuit of synchronous rectification, improve the delivery efficiency of electric current, and save space, reduce loss and install simple.
With reference to figure 1 and Fig. 2, the general Integrated predict model of the flat surface transformer 100 that the utility model provides on power module PCB, as the power transfer transmission transformer of power supply.This flat surface transformer 100 comprises magnetic core 10, former limit winding 40, secondary assembly 20, exports bus-bar 30 and socket bus-bar 50.Former limit winding 40, secondary assembly 20 winding are in magnetic core 10, and secondary assembly 20 is connected on socket bus-bar 50 in the mode be threaded by exporting bus-bar 30.One end of socket bus-bar 50 is welded with power module PCB.Adopt this kind of structure, flat surface transformer 100 directly receives the output port of power module PCB by exporting bus-bar 30, take full advantage of the solid space in power module PCB.In the present embodiment, can according to the power stage demand of flat surface transformer 100, choice for use multiple former limit winding 40, secondary assembly 20, multiple former limits winding 40, multiple secondary assemblies 20 etc. form the combination of former and deputy limit, by the demand selecting suitable former and deputy limit combination can realize exporting big current.
In the present embodiment, with reference to figure 5, magnetic core 10 is PQ type magnetic core, comprises magnetic core main body and is convexly equipped in the center pillar 102 in magnetic core main body.This magnetic core main body comprises a pair upper wall surface 101 about center pillar 102 symmetry and lower wall surface 103.Here " on ", D score all with the direction as shown of Fig. 1 planar transformers 100 for reference.PQ type magnetic core is magnetic core model conventional in flat surface transformer prior art, therefore does not repeat them here.
In the present embodiment, former limit winding 40 is by the coil of wrapped with insulation at least one wire coiling, adopts insulating material, as adhesive tape parcel can meet the requirement of reinforced insulation.The number of share of stock of wire can be selected according to the actual requirements, thus can select the wire diameter of wire flexibly.In the present embodiment, when flat surface transformer 100 arranges multiple former limit winding 40, multiple former limits winding 40 can be connected, to make the uniform current in former limit winding 40.
In the present embodiment, secondary assembly 20 comprises at least one secondary unit.Each secondary unit is included in the vice-side winding 2021 be coupled with former limit winding 40 under magnetic core 10 acts on, the electric current produced for being coupled to vice-side winding 2021 and former limit winding 40 carries out the rectification circuit plate 201 of rectification process and the output for exporting the electric current after rectification process, and rectification circuit plate 201 is connected with vice-side winding 2021 and output respectively.Adopt this structure, when being energized, vice-side winding 2021 is coupled with former limit winding 40 and produces induced current, electric current flows into circuit of synchronous rectification from vice-side winding 2021, output is flowed to again through circuit of synchronous rectification, finally be delivered on power module PCB by output, thus decrease the loop path of high-frequency current, improve the delivery efficiency of electric current.In the present embodiment, rectification circuit plate 201 is SR plate, be not connected with one of vice-side winding 2021 in this rectification circuit plate 201 and be integrated with rectification circuit on the surface, wherein rectification circuit comprises synchronous rectifier, absorbs filter capacitor, metal-oxide-semiconductor drive circuit, metal-oxide-semiconductor absorbing circuit and metal-oxide-semiconductor interlock circuit, annexation above between each electronic component is the circuit of synchronous rectification of prior art, does not repeat them here.
Particularly, with reference to figure 3 and Fig. 4, each secondary unit also comprises the connector 2022 for connecting vice-side winding 2021 and output.Connector 2022 and rectification circuit plate 201 be arranged in parallel, and a side of connector 2022 is connected with rectification circuit plate 201 by welding.Adopt the mode of welding, the screw eliminated between vice-side winding 2021 with rectification circuit plate 201 is connected, and installs simply, saves space, reduces the wastage and raise the efficiency.
In the present embodiment, the vice-side winding 2021 of each secondary unit, connector 2022 and output are made up through punching press is one-body molded of copper sheet.Vice-side winding 2021 is rounded, suitable with the shape of coil.Connector 2022 in the form of sheets.Through hole 2026 is offered in vice-side winding 2021.The penetrating via of the center pillar 102 of accommodating magnetic core 10 is configured for together with the hole of this through hole 2026 in the coil of former limit winding 40.The center pillar 102 of this magnetic core 10 is located in penetrating via and forms a magnetic circuit, and the coil of former limit winding 40 and vice-side winding 2021 are coupled.
Particularly, in the present embodiment, secondary assembly comprises two secondary unit be superimposed with each other, and is called the first secondary unit 202 and the second secondary unit 203.The vice-side winding 2021 of this first secondary unit 202 is connected with vice-side winding 2021 heart tap position place spot welding wherein of the second secondary unit 203.Adopt the mode of spot welding can reduce radio circuit path, raise the efficiency.
A wherein side of the connector 2022 of the first secondary unit 202 and rectification circuit plate 201 solder interconnections, the another side (not being connected with the side of rectification circuit plate 201) of the first secondary unit 202 is separated by the another side (not being connected with the side of rectification circuit plate 201) of the connector 2022 of dielectric film and the second secondary unit 203, thus avoids both electrical communication.In other embodiments, secondary assembly can also comprise three, the individual secondary unit be superimposed with each other of four or more, and multiple secondary unit can adopt aforesaid way to connect.
In the present embodiment, the structure of the connector 2022 of the first secondary unit 202 is different from the structure of the connector 2022 of the second secondary unit 203, to coordinate better when both connect.Certainly in other examples, both can adopt identical structure.
With reference to figure 3, in the present embodiment, the connector 2022 of the first secondary unit 202 comprises parallel and spaced first sub-connecting member 2022a and the second sub-connecting member 2022b.First sub-connecting member 2022a is all connected with vice-side winding 2021 with the second sub-connecting member 2022b, and three is in the same plane.Heat radiation limit 2023 is formed with away from the edge of the second sub-connecting member 2022b towards the direction bending away from rectification circuit plate 201 in first sub-connecting member 2022a.This heat radiation limit 2023 is better for 90 ° of bendings.When flat surface transformer 100 comprises multiple secondary assembly 20, the upper wall surface 101 of multiple heat radiation limit 2023 and magnetic core 10 constitutes heat radiation plane, is pasted onto on outside fin (not shown) to realize the heat radiation of magnetic core, secondary assembly.The 3rd fillet 2027 is formed away from the end of this vice-side winding 2021 towards the direction bending away from rectification circuit plate 201 in heat radiation limit 2023,3rd fillet 2027 is used as output, for being threaded with socket bus-bar 50 directly to be imported in power module PCB by electric current.The first fillet 2024 is formed with away from the end of vice-side winding 2021 away from the direction bending of rectification circuit plate 201 in second sub-connecting member 2022b, this first fillet 2024 is also used as output, for being threaded with socket bus-bar 50 directly to be imported in power module PCB by electric current.
With reference to figure 4, as can be seen from the figure, difference between the connector 2022 of the second secondary unit 203 shown in Fig. 4 and the connector 2022 of the first secondary unit 202 is only: the first sub-connecting member 2022a of the connector 2022 of the second secondary unit 203 does not form limit of dispelling the heat, and is all formed with the second fillet 2025 towards the direction bending away from connected rectification circuit plate 201 away from the end of vice-side winding 2021 in the first sub-connecting member 2022a and the second sub-connecting member 2022b.This second fillet 2025 is used as output.
Output all can be connected on socket bus-bar 50 in the mode be threaded by exporting bus-bar 30, thus realizes electric current directly to transfer on power module PCB.
In order to realize more high-power and output that is electric current, the flat surface transformer that multiple the utility model provides can be arranged in parallel.
In the present embodiment, socket bus-bar 50 and output bus-bar 30 are all formed with bending edges in top edge, the heat radiation limit 2023 of these bending edges and secondary assembly 20 and the upper wall surface 101 of magnetic core 10 together form heat radiation plane, thus achieve the heat radiation of flat surface transformer 100.
The utility model is by the mode of integrated rectification circuit and vice-side winding, vice-side winding and rectification circuit plate are integrated thus decreases the loop path of flat surface transformer to rectification circuit, improve the delivery efficiency of electric current, and save space, reduce loss and install simple; Former limit winding is made by the mode of wrapped with insulation at least one wire, can meet the requirement of reinforced insulation; Secondary assembly is comprised and being superimposed with each other and the first secondary unit connected by spot welding and the second secondary unit, and the mode connected by spot welding, is reduced radio circuit path, raise the efficiency; When secondary assembly comprises multiple secondary unit, the heat radiation limit of secondary unit will be arranged in heat radiation plane, the upper wall surface of this heat radiation plane and magnetic core is positioned at same plane, then this heat radiation plane, upper wall surface all can fit with the heat dissipation cold plate of outside, thus conduct heat to heat radiation external cooling cold drawing realizing flat surface transformer.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to the utility model claims.
Claims (10)
1. a flat surface transformer, is characterized in that, comprises magnetic core (10), former limit winding (40) and secondary assembly (20), and described secondary assembly (20) comprises at least one secondary unit,
The vice-side winding (2021) that each described secondary unit is coupled with described former limit winding (40) under being included in described magnetic core (10) effect, the electric current produced for being coupled to described vice-side winding (2021) and described former limit winding (40) carry out the rectification circuit plate (201) of rectification process and the output for exporting the electric current after rectification process, and described rectification circuit plate (201) is connected with described vice-side winding (2021) and described output respectively;
Described former limit winding (40), vice-side winding (2021) winding are on described magnetic core (10).
2. flat surface transformer according to claim 1, is characterized in that, each described former limit winding (40) is by the wrapped with insulation at least coil that turns to of one wire.
3. flat surface transformer according to claim 2, it is characterized in that, each described secondary unit also comprises the connector (2022) for connecting described vice-side winding (2021) and described output, described connector (2022) and described rectification circuit plate (201) be arranged in parallel, and a side of described connector (2022) is connected with described rectification circuit plate (201) by welding.
4. flat surface transformer according to claim 3, is characterized in that, described vice-side winding (2021), output and connector (2022) are made of one piece by copper sheet.
5. flat surface transformer according to claim 4, it is characterized in that, described secondary assembly (20) comprises the first secondary unit (202) and the second secondary unit (203) that are superimposed with each other, and described first secondary unit (202) and described second secondary unit (203) include described vice-side winding (2021), connector (2022), output and rectification circuit plate (201);
The vice-side winding (2021) of described first secondary unit (202) is connected in the spot welding of centre cap place with the vice-side winding (2021) of described second secondary unit (203);
The connector (2022) of described first secondary unit (202) is separated by dielectric film with between the corresponding two sides of the connector (2022) of described second secondary unit (203).
6. flat surface transformer according to claim 5, it is characterized in that, the connector (2022) of described first secondary unit (202) comprises and being spaced from each other and the first sub-connection portion (2022a) be arranged in parallel and the second sub-connection portion (2022b);
Heat radiation limit (2023) is formed away from the edge in described second sub-connection portion (2022b) towards the direction bending away from described rectification circuit plate (201) in described first sub-connection portion (2022a);
End away from described vice-side winding (201) in described second sub-connection portion (2022b) is formed with the first fillet (2024) towards the direction bending away from described rectification circuit plate (201), and described first fillet (2024) is as described output.
7. flat surface transformer according to claim 6, it is characterized in that, the connector (2022) of described second secondary unit (203) comprises and being spaced from each other and the first sub-connecting member (2022a) be arranged in parallel and the second sub-connecting member (2022b);
One end away from described vice-side winding (2021) in described first sub-connecting member (2022a) and described second sub-connecting member (2022b) is formed with the second fillet (2025) towards the direction bending away from described rectification circuit plate (201) respectively, and described second fillet (2025) is as described output.
8. flat surface transformer according to claim 7, is characterized in that, described magnetic core (10) is PQ type magnetic core, comprises magnetic core main body and the center pillar (102) protruding from described magnetic core main body;
Described vice-side winding (2021) offers through hole (2026), and described through hole (2026) together form the penetrating via for accommodating described center pillar (102) with the coil of described former limit winding (40).
9. flat surface transformer according to claim 8, it is characterized in that, described magnetic core main body comprises a pair upper wall surface (101) about described center pillar (102) symmetry and lower wall surface (103), and described upper wall surface (101) and described heat radiation limit (2023) are configured for the heat radiation plane of dispelling the heat to described flat surface transformer (100).
10. the flat surface transformer according to any one of claim 1-9, it is characterized in that, the output bus-bar (30) that described flat surface transformer (100) also comprises the socket bus-bar (50) for being electrically connected with power module PCB and is connected between described socket bus-bar (50) and described output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420470342.5U CN204066973U (en) | 2014-08-19 | 2014-08-19 | Flat surface transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420470342.5U CN204066973U (en) | 2014-08-19 | 2014-08-19 | Flat surface transformer |
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| Publication Number | Publication Date |
|---|---|
| CN204066973U true CN204066973U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420470342.5U Active CN204066973U (en) | 2014-08-19 | 2014-08-19 | Flat surface transformer |
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| CN (1) | CN204066973U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712518A (en) * | 2015-11-13 | 2017-05-24 | 台达电子企业管理（上海）有限公司 | Converter module, transformer module and circuit thereof |
| CN109074951A (en) * | 2016-04-25 | 2018-12-21 | 三菱电机株式会社 | Power conversion device |
| CN111933434A (en) * | 2020-08-10 | 2020-11-13 | 西安电子科技大学 | Planar transformer |
-
2014
- 2014-08-19 CN CN201420470342.5U patent/CN204066973U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712518A (en) * | 2015-11-13 | 2017-05-24 | 台达电子企业管理（上海）有限公司 | Converter module, transformer module and circuit thereof |
| CN106712518B (en) * | 2015-11-13 | 2019-03-12 | 台达电子企业管理（上海）有限公司 | Converter module, transformer module and its circuit |
| US10263530B2 (en) | 2015-11-13 | 2019-04-16 | Delta Electronics (Shanghai) Co., Ltd | Converter module, transformer module and circuit thereof |
| US10608549B2 (en) | 2015-11-13 | 2020-03-31 | Delta Electronics (Shanghai) Co., Ltd | Converter module |
| CN109074951A (en) * | 2016-04-25 | 2018-12-21 | 三菱电机株式会社 | Power conversion device |
| CN111933434A (en) * | 2020-08-10 | 2020-11-13 | 西安电子科技大学 | Planar transformer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Patentee after: Vitamin Technology Co., Ltd. Address before: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Patentee before: Aimosheng Network Energy Source Co., Ltd. |