CN102360854A - Planar transformer with U-shaped magnetic cores - Google Patents
Planar transformer with U-shaped magnetic cores Download PDFInfo
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- CN102360854A CN102360854A CN2011102191508A CN201110219150A CN102360854A CN 102360854 A CN102360854 A CN 102360854A CN 2011102191508 A CN2011102191508 A CN 2011102191508A CN 201110219150 A CN201110219150 A CN 201110219150A CN 102360854 A CN102360854 A CN 102360854A
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Abstract
The invention provides a planar transformer with U-shaped magnetic cores. The planar transformer comprises a metal shell, a pair of U-shaped magnetic cores which are positioned in the metal shell and are spliced with each other, stripped magnetic cores which are positioned on the inner sides of the U-shaped magnetic cores, insulation supports which are positioned on two sides of the stripped magnetic cores, and windings which are wound on the insulation supports. The planar transformer with the U-shaped magnetic cores has the advantages that: by adjusting magnetic conductivity of the stripped magnetic cores, the leakage inductance of the whole transformer is adjusted; and the planar transformer can dissipate heat, and is high in power density, and efficiency; and the consistency of distribution parameters is high, and the adjustment mode of leakage inductance is flexible and convenient.
Description
[technical field]
The present invention relates to magnetic material and inductance technical field, relate in particular to a kind of combined magnet core formula U type magnetic core flat surface transformer that is used on the soft switch resonant power.
[background technology]
Along with electronic circuit develops to high frequencyization, high power density, high reliability, high integration, DC power supply is had higher requirement.High switching frequency, low-loss, high power density, switching frequency high frequencyization, modularization, flattening are the development trends of DC power supply.
Can better meet the direct-current switch power supply of above-mentioned requirements at present; The general mode that adopts soft switch resonance; In order to dwindle the volume of whole power supply, the inductor of general resonant circuit and electric capacity are provided by the leakage inductance and the distributed capacitance (distributed capacitance that also has switching tube) of main transformer.But the leakage inductance of traditional transformer and distributed capacitance; Be difficult to its batch of control consistency; Brought very big difficulty with regard to criticizing the product debugging for actual circuit like this; The stereochemical structure of the traditional transformer trend of suitable present power supply flattening in addition is because its structure is unfavorable for heat radiation, so be difficult to realize high frequencyization, low-loss, close, the flat modular development trend of high power.
[summary of the invention]
Technical problem to be solved by this invention is to provide a kind of U type magnetic core flat surface transformer, and it has characteristics such as high frequency, high power density, high efficiency, meets flattening Design and Development trend.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of U type magnetic core flat surface transformer comprises metal shell, is positioned at said metal shell and a pair of U type magnetic core that splices each other, is positioned at the inboard stripe shape magnetic core of said U type magnetic core, is positioned at the insulating support of said stripe shape magnetic core both sides and is wound in the winding on the said insulating support.
Further, said a pair of U type magnetic core is two ferrite soft magnetic magnetic cores, and it is platypelloid type, and bonding each other through glue each other.
Further, said U type magnetic core is provided with the U type arm of pair of opposing and is positioned at the middle accepting groove of said U type arm, and the bottom of said accepting groove is provided with draw-in groove.
Further, said stripe shape magnetic core is contained in the said accepting groove, and cooperates with draw-in groove in the said accepting groove.
Further, said metal shell is the U type, and is processed by non-magnetic conductive metal.
Further, said winding comprises elementary winding, secondary winding and auxiliary winding, and said winding adopts silk screen flat wire that insulation circle enamelled wire is woven into, covers dielectric film Copper Foil, enamel insulated round copper wire or flat type copper wire, three layer insulation wire is processed.
Further, said insulating support is two, is located at the both sides of said stripe shape magnetic core respectively, and an end of each insulating support is provided with a metal exit, and the other end is provided with two metal exits.
Further, be provided with insulating barrier between said winding and the stripe shape magnetic core.
Further, the recording quantity of said metal shell covers on the said U type magnetic core.
The beneficial effect of U type magnetic core flat surface transformer of the present invention is; Its magnetic permeability through adjustment stripe shape magnetic core is adjusted the leakage inductance of whole transformer, and its good heat dissipation, power density is high, efficient is high, distributed constant high conformity, leakage inductance adjustment mode are more flexible.
[description of drawings]
The sketch map that Fig. 1 assembles for a kind of U type magnetic core flat surface transformer of the present invention.
Fig. 2 is the U type metal shell sketch map of a kind of U type magnetic core flat surface transformer of the present invention.
Fig. 3 is the U type soft magnetic metal magnetic core of a kind of U type magnetic core flat surface transformer of the present invention.
[embodiment]
Like Fig. 1 and shown in Figure 3; The present invention provides a kind of U type magnetic core flat surface transformer 100, it comprise a pair of mutual splicing U type metal shell 10, be positioned at said metal shell 10 and splicing each other a pair of U type magnetic core 20, be positioned at the inboard stripe shape soft magnetic metal magnetic core 30 of said U type magnetic core 20, be positioned at said stripe shape soft magnetic metal core 30 outsides insulating support 40 and insulating barrier 50, be wound in elementary winding 60, secondary winding 70 and a pair of auxiliary winding 80 on the said insulating support 40.
See also Fig. 1 and shown in Figure 2, said single U type metal shell 10 recording quantity design forms a cover body, and it covers on the said U type magnetic core 20, plays shielding action, and is provided with the U type arm 11 of pair of opposing and is positioned at the inboard opening 12 of U type arm 11.Said metal shell 10 is for punch forming or adopt the mode of ceramic surface metallization to process, and it is non-magnetic conductive metal material, is mainly used in the dielectric constant and the thermolysis of control U type magnetic core 20 surperficial leakage inductances, control distributed capacitance.
Said a pair of U type magnetic core 20 splices each other through glue and is combined into a whole magnetic core; See also shown in Figure 3; Said single U type magnetic core 20 is a platypelloid type ferrite soft magnetic magnetic core; Its shape and said U type metal shell 10 match, and are provided with the U type arm 21 of pair of opposing and are positioned at the accepting groove 22 in the middle of the U type arm 21, and the bottom of said accepting groove 22 is provided with the draw-in groove 23 that cooperates with said stripe shape soft magnetic metal magnetic core 30; And said stripe shape soft magnetic metal magnetic core 30 is nested in the said draw-in groove 23 back and carries out bondingly with glue, realizes strong fix.In order to satisfy the needs of modular power source producing in serial form; Same power power-supply often adopts same size magnetic core; After but the power supply no-load voltage ratio changes, the inductance value that resonant circuit needs will change, for the ease of the debugging of leakage inductance; The present invention has designed in above-mentioned stripe shape soft magnetic metal magnetic core 30 and the draw-in groove 23 with its said U type magnetic core 20 of packing into especially, adjusts and control leakage inductance through the magnetic permeability of regulating stripe shape soft magnetic core material.
Said elementary winding 60, secondary winding 70, auxiliary winding 80 materials adopt silk screen flat wire that insulation circle enamelled wire is woven into, cover the making of dielectric film Copper Foil, enamel insulated round copper wire or enamel-cover flat type copper wire, three layer insulation wire is made.And elementary winding 60 all adopts the overlay film Copper Foil or the enamel-cover flat copper band that meet the skin depth requirement perhaps to be made by the bandlet that many insulated enamel insulated round copper wire is woven into secondary winding 70; Can avoid like this because frequency raises; Because skin effect increases the winding effective resistance, increase winding temperature rise, this winding can make winding under same temperature rise; Realize high current density, can be suitable for higher operating frequency.And be provided with said insulating barrier 50 between said winding and the said stripe shape soft magnetic metal magnetic core 30.
Said insulating support 40 is positioned at the both sides of said U type magnetic core 20, is used to twine said winding, and this structure realizes batch stability and the consistency of distributed capacitance and leakage inductance.And also be provided with outward extending metal exit 41 on the said insulating support 40, be used for wiring and connect with outer member, wherein, an end of said each insulating support 40 is provided with two metal exits, and the other end is provided with three metal exits.The rising of said auxiliary winding 80, tail two all are welded on the metal exit 41 of said insulating support 40.
In addition, during said a pair of U type magnetic core 20 splicings, it is fixing to use high temperature bond glue to bond on the Mosaic face, and that the contact-making surface of insulating support 40 and U type magnetic core 20 also adopts adhesive glue to carry out is bonding.
The installation process of U type magnetic core flat surface transformer 100 of the present invention does; At first; To be wound on two insulating supports 40 according to the number of turn of design respectively by the winding that the bandlet that overlay film Copper Foil or enamel-cover flat copper band perhaps are woven into by many insulated enamel insulated round copper wire is made; The winding exit of needs welding is welded to the metal exit on the said insulating support 40; If winding is overlay film Copper Foil or enamel-cover flat copper band, need overlay film Copper Foil or enamel-cover flat copper band exit partial insulative layer be removed and carry out scolding tin, keep suitable length according to designing requirement.Then, the non-magnetic conduction U type metal shell after the punch forming 10 is nested and bond on the said U type ferrite magnetic core 20, if three ceramic metallizations had been carried out on said U type ferrite magnetic core 20 surfaces, then this metal shell can be installed.Then, with 20 butt joints of the U type magnetic core of a pair of nested bonding said non-magnetic conductive metal shell and be installed on two supports, and U type magnetic core is clamped with instrument.Subsequently, stripe shape soft magnetic metal magnetic core is nested in the draw-in groove 23 of said U type ferrite magnetic core 20.Whether meet the requirements according to designing requirement test transformer leakage inductance; If it is undesirable; Change the stripe shape soft magnetic metal magnetic core of different magnetic permeabilitys, test again, when leakage inductance meets the demands; With two secondary U type ferrite magnetic cores, 20 joints, U type ferrite magnetic core 20 draw-in grooves 23 and stripe shape magnetic core 30 joints, insulating support 40 junction, all use bonded adhesives such as epoxy resin to carry out bonding with U type ferrite magnetic core 20.At last, two insulating barriers 50 are inserted into the place, slit of 30 of winding and stripe shape magnetic cores respectively and it is bonded on stripe shape magnetic core 30 and the winding, so, finally accomplish the making of U type magnetic core flat surface transformer according to the invention.
U type magnetic core flat surface transformer of the present invention is adjusted the leakage inductance of whole transformer through the magnetic permeability of adjustment stripe shape soft magnetic metal magnetic core, to satisfy the needs of soft switching power resonant circuit.This novel soft switch resonant power combined magnet core type U type magnetic core flat surface transformer and conventional softer switch resonant power with traditional transformer relatively, the suitable more modular power source demand of its flattening design, good heat dissipation, power density is high, efficient is high, distributed constant high conformity, leakage inductance adjustment mode are more flexible, operating frequency can reach 3MHz; The soft switch resonant power that uses this transformer to make is convenient to debugging production, high conformity, and production efficiency is high, stable performance.
The above only is a most preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, all belongs within the scope of technical scheme of the present invention.Any those of ordinary skill in the art are not breaking away under the technical scheme scope situation of the present invention, utilize the method content of above-mentioned announcement that technical scheme of the present invention is made many possible changes and modification, all belong to the scope of claims protection.
Claims (9)
1. a U type magnetic core flat surface transformer is characterized in that: comprise metal shell, be positioned at said metal shell and a pair of U type magnetic core that splices each other, be positioned at the inboard stripe shape magnetic core of said U type magnetic core, be positioned at the insulating support of said stripe shape magnetic core both sides and be wound in the winding on the said insulating support.
2. U type magnetic core flat surface transformer according to claim 1 is characterized in that: said a pair of U type magnetic core is two iron oxidation soft magnetic cores, and it is platypelloid type, and bonding each other through glue each other.
3. U type magnetic core flat surface transformer according to claim 2 is characterized in that: said U type magnetic core is provided with the U type arm of pair of opposing and is positioned at the middle accepting groove of said U type arm, and the bottom of said accepting groove is provided with draw-in groove.
4. U type magnetic core flat surface transformer according to claim 3, it is characterized in that: said stripe shape magnetic core is contained in the said accepting groove, and cooperates with draw-in groove in the said accepting groove.
5. U type magnetic core flat surface transformer according to claim 4, it is characterized in that: said metal shell is the U type, and is processed by non-magnetic conductive metal.
6. U type magnetic core flat surface transformer according to claim 5; It is characterized in that: said winding comprises elementary winding, secondary winding and auxiliary winding, and said winding adopt the braiding of insulation circle enamelled wire the silk screen flat wire, cover dielectric film Copper Foil, enamel insulated round copper wire or flat type copper wire, three layer insulation wire is processed.
7. according to any described U type magnetic core flat surface transformer in the claim 1 to 6; It is characterized in that: said insulating support is two; Be located at the both sides of said stripe shape magnetic core respectively, and an end of each insulating support is provided with a metal exit, the other end is provided with two metal exits.
8. U type magnetic core flat surface transformer according to claim 7 is characterized in that: be provided with insulating barrier between said winding and the stripe shape magnetic core.
9. U type magnetic core flat surface transformer according to claim 8 is characterized in that: the recording quantity of said metal shell covers on the said U type magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110219150 CN102360854B (en) | 2011-08-02 | 2011-08-02 | Planar transformer with U-shaped magnetic cores |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110219150 CN102360854B (en) | 2011-08-02 | 2011-08-02 | Planar transformer with U-shaped magnetic cores |
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| CN102360854A true CN102360854A (en) | 2012-02-22 |
| CN102360854B CN102360854B (en) | 2013-06-12 |
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| CN 201110219150 Active CN102360854B (en) | 2011-08-02 | 2011-08-02 | Planar transformer with U-shaped magnetic cores |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157412A (en) * | 2014-08-28 | 2014-11-19 | 东莞市大忠电子有限公司 | High-voltage transformer and manufacturing method thereof |
| CN105742004A (en) * | 2014-12-30 | 2016-07-06 | 三星电机株式会社 | Inductor and manufacturing method thereof |
| CN106158241A (en) * | 2014-09-15 | 2016-11-23 | 株式会社搜路研 | Coil block and manufacture method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646841Y (en) * | 2003-08-26 | 2004-10-06 | 台北沛波电子股份有限公司 | High voltage transformer device |
| CN101256883A (en) * | 2007-12-29 | 2008-09-03 | 北京中机联供非晶科技发展有限公司 | Non-encapsulation type amorphous iron core |
| CN101499362A (en) * | 2008-01-28 | 2009-08-05 | 昱京科技股份有限公司 | Combined co-mode coil |
| CN101901673A (en) * | 2010-05-21 | 2010-12-01 | 郑州金阳电气有限公司 | 5/7 sloping four-seam lamination mode of three-phase three-limb transformer core |
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2011
- 2011-08-02 CN CN 201110219150 patent/CN102360854B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646841Y (en) * | 2003-08-26 | 2004-10-06 | 台北沛波电子股份有限公司 | High voltage transformer device |
| CN101256883A (en) * | 2007-12-29 | 2008-09-03 | 北京中机联供非晶科技发展有限公司 | Non-encapsulation type amorphous iron core |
| CN101499362A (en) * | 2008-01-28 | 2009-08-05 | 昱京科技股份有限公司 | Combined co-mode coil |
| CN101901673A (en) * | 2010-05-21 | 2010-12-01 | 郑州金阳电气有限公司 | 5/7 sloping four-seam lamination mode of three-phase three-limb transformer core |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157412A (en) * | 2014-08-28 | 2014-11-19 | 东莞市大忠电子有限公司 | High-voltage transformer and manufacturing method thereof |
| CN106158241A (en) * | 2014-09-15 | 2016-11-23 | 株式会社搜路研 | Coil block and manufacture method thereof |
| CN105742004A (en) * | 2014-12-30 | 2016-07-06 | 三星电机株式会社 | Inductor and manufacturing method thereof |
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| Publication number | Publication date |
|---|---|
| CN102360854B (en) | 2013-06-12 |
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