CN101651017A - Liquid-magnetism filled high-frequency transformer - Google Patents
Liquid-magnetism filled high-frequency transformer Download PDFInfo
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- CN101651017A CN101651017A CN200910036653A CN200910036653A CN101651017A CN 101651017 A CN101651017 A CN 101651017A CN 200910036653 A CN200910036653 A CN 200910036653A CN 200910036653 A CN200910036653 A CN 200910036653A CN 101651017 A CN101651017 A CN 101651017A
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- 239000007788 liquid Substances 0.000 claims description 91
- 239000000843 powder Substances 0.000 claims description 43
- 230000004907 flux Effects 0.000 claims description 30
- 239000012762 magnetic filler Substances 0.000 claims description 27
- 239000013078 crystal Substances 0.000 claims description 23
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 claims description 23
- 229910052451 lead zirconate titanate Inorganic materials 0.000 claims description 23
- 239000010453 quartz Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 8
- 238000000016 photochemical curing Methods 0.000 claims description 8
- 239000002305 electric material Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The invention relates to the field of electronic equipment and discloses a liquid-magnetism filled high-frequency transformer; the liquid-magnetism filled high-frequency transformer comprises an uppermagnetic core, a lower magnetic core and a coil, the coil is arranged between the upper magnetic core and the lower magnetic core, liquid-magnetism fillers are filled in a magnetic gap between the upper magnetic core and the lower magnetic core. The liquid-magnetism filled high-frequency transformer provided by the invention can reduce radiated noise caused by magnetic-flux leakage and leakage inductance, improves the reliability of products, and improves the conversion efficiency and output power of a switch power supply, therefore, the liquid-magnetism filled high-frequency transformer hasthe advantages of electricity saving, stability, reliability and long service life.
Description
Technical field
The present invention relates to electronic device field, specifically a kind of transformer.
Background technology
In recent years, switch power technology just develops towards efficient, energy-conservation, safety, environmental protection, weak point, little, light, thin aspect.In the Switching Power Supply of no industrial frequency transformer, high frequency transformer is one of core component, and Design of High Frequency Transformer is the key technology of Switching Power Supply, high frequency transformer design whether reasonable can have influence on the cost, volume, stability, electromagnetic interference, radiated noise, EMI filtering, power output, conversion efficiency of Switching Power Supply etc.
When single power tube was exported, saturated for preventing magnetic core, magnetic core will leave certain air gap (abbreviation air gap).EI, the EE that Switching Power Supply is commonly used and the magnetic flux path of POT type magnetic core are as shown in Fig. 1～3, because of near the magnetic flux density the air gap very high, can produce the magnetic flux noise, so magnetic flux can not stride across other position that air gap arrives magnetic core, therefore, when the design high frequency transformer, promptly to solve the magnetic core saturation problem, magnetic flux need be solved again and the problem that air gap arrives other position of magnetic core can not be striden across.Recommending, in half-bridge, full-bridge, the circuit such as compound,,, also can influence inductance value and conversion efficiency simultaneously in the prior art because the existence of magnetic resistance during the magnetic core butt joint can produce the magnetic flux noise equally though magnetic core can dock.
Summary of the invention
Be to solve the problem that prior art exists, the invention provides a kind of magnetic flux noise, economize on electricity, stable, reliable, liquid-magnetism filled high-frequency transformer that the life-span is long of reducing.
The present invention is achieved in that
A kind of liquid-magnetism filled high-frequency transformer comprises magnetic core, following magnetic core and coil, and described going up between magnetic core and the following magnetic core is provided with coil, and the described magnetic gap of going up between magnetic core and the following magnetic core is filled with liquid magnetic filler.
Traditional high frequency transformer, when magnetic field intensity H starts from scratch increase, every increase by 0.5 oersted, corresponding magnetic induction density B increases 1000 Gausses, and when magnetic flux density rose to 5000 Gausses, magnetic core was saturated suddenly; When H increases 0.5 oersted again, B only increases several Gausses; When magnetic field intensity H continues to increase, every increase by 1 oersted of H, magnetic induction density B only increases 1 Gauss, is exactly magnetic permeability=1, at this moment magnetic core saturated fully (as shown in Figure 6).And for liquid magnetic, its H/B curve as shown in Figure 7, magnetic flux density increases with magnetic field intensity, when magnetic field intensity H was increased to 9 oersteds, magnetic flux density also increased again, magnetic core does not reach capacity.As shown in Figure 8, in the liquid magnetic filler between the magnetic core magnetic gap of the present invention, because piezoelectric can produce piezoelectric effect, so when magnetic field intensity increased, piezoelectric effect strengthened, the magnetism molecule unit are of liquid magnetic increases, and magnetic gap increases, and magnetic flux density weakens; When magnetic field intensity weakened, piezoelectric effect weakened, and the magnetism molecule unit are of liquid magnetic reduces, and magnetic flux density strengthens, thereby has solved the saturated problem of magnetic core, has reduced the magnetic flux noise.
Optionally, described liquid magnetic filler is mixed by liquid magnetic and seccotine, and the mass percent of described liquid magnetic is 60%～80%, and the mass percent of described seccotine is 20%～40%.
Optionally, the mass percent of described liquid magnetic is 68%, and the mass percent of described seccotine is 32%.
Optionally, described liquid magnetic filler is mixed by liquid magnetic, piezo-electric material powder and seccotine.
The operating frequency of quasi-resonant switching power supply is changeless, its frequency depends on the inductance value L of transformer and the distributed capacitance C of transformer, changing distributed capacitance C can be as shown in Figure 9, on MOSFET and connect electric capacity, but inductance value L then depends on the elementary umber of turn of transformer and the magnetic flux density BS of magnetic core.But because magnetic core is influenced by temperature, humidity, quality of materials, material mixing evenness etc. during fabrication, its technical parameter such as magnetic flux, magnetic permeability etc. are difficult to accomplish unanimity, and this has brought trouble just for the producer of production Switching Power Supply when producing in batches.Can regulate inductance value automatically and the present invention adds piezo-electric material powder in liquid magnetic, its characteristic curve as shown in figure 10, when inductance value reduces, increase frequency, thus the amplitude of piezoelectric effect reduces, and the magnetism molecule unit are of liquid magnetic reduces, magnetic gap reduces, and inductance value increases, and frequency reduces; When inductance value increases, frequency reduces, thereby the piezoelectric effect amplitude increases, the magnetism molecule unit are of liquid magnetic increases, magnetic gap increases, and inductance value reduces, increase frequency, thereby realized of the automatic adjusting of liquid magnetic filler, solved the difficult problem of Switching Power Supply because of the inaccurate debug difficulties of bringing of high frequency transformer inductance value to inductance value.
Optionally, described piezoelectric is a lead zirconate titanate, and the mass percent of described liquid magnetic is 30%～40%, and the mass percent of described lead zirconate titanate powder is 40%～60%, and the mass percent of described seccotine is 10%～30%.
Optionally, described piezoelectric is a quartz crystal, and the mass percent of described liquid magnetic is 25%～40%, and the mass percent of described quartz crystal powder is 40%～65%, and the mass percent of described seccotine is 10%～30%.
Optionally, described liquid magnetic filler is mixed by liquid magnetic, piezo-electric material powder, and the method that described piezoelectric and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core.
Optionally, described piezoelectric is a lead zirconate titanate, and the mass percent of described lead zirconate titanate powder is 55%～68%, and the mass percent of described liquid magnetic is 32%～45%.
Optionally, described piezoelectric is a quartz crystal, and the mass percent of described quartz crystal powder is 55%～68%, and the mass percent of described liquid magnetic is 32%～45%.
Liquid-magnetism filled high-frequency transformer provided by the invention has solved the magnetic core saturation problem, has solved magnetic flux again and can not stride across the problem that air gap arrives other position of magnetic core, has reduced the radiated noise that produces because of leakage field, leakage inductance.The present invention can well be mated with power tube, has reduced the withstand voltage of power tube, has reduced the withstand voltage cost that just equals to have reduced Switching Power Supply of power tube; Simultaneously also improved reliability of products, therefore, also improved the conversion efficiency and the power output of Switching Power Supply, more economize on electricity, more stable, more reliable, the life-span is longer.
The present invention not only can be used on the regular tap power supply, also can be used on electronic transformer, resonance type switching power and the quasi-resonant switching power supply.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is the magnetic flux path schematic diagram of conventional art magnetic core of transformer;
Fig. 2 is the magnetic flux path schematic diagram of another kind of conventional art magnetic core of transformer;
Fig. 3 is the magnetic flux path schematic diagram of another conventional art magnetic core of transformer;
The structural representation of the liquid-magnetism filled high-frequency transformer that Fig. 4 provides for the embodiment of the invention;
The assembling schematic diagram of the liquid-magnetism filled high-frequency transformer that Fig. 5 provides for the embodiment of the invention;
Fig. 6 is the curve chart of solid-state magnetic magnetic flux density with change of magnetic field strength;
Fig. 7 is the curve chart of liquid magnetic magnetic flux density with change of magnetic field strength;
The liquid-magnetism filled high-frequency transformer magnetic flux density that Fig. 8 provides for the embodiment of the invention is with the curve chart of change of magnetic field strength;
Fig. 9 is a quasi-resonance forward converter circuit diagram;
The liquid-magnetism filled high-frequency transformer inductance value that Figure 10 provides for the embodiment of the invention 4～15 is with the curve chart of frequency change.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1:
Shown in Fig. 4,5, the liquid-magnetism filled high-frequency transformer that present embodiment provides, comprise magnetic core 1, following magnetic core 2 and coil 3, between last magnetic core 1 and the following magnetic core 2 coil 3 is set, coil is provided with input lead 5 and output lead 6, magnetic gap between last magnetic core 1 and the following magnetic core 2 is filled with liquid magnetic filler 4, the liquid magnetic filler mixture that liquid magnetic and seccotine are formed of serving as reasons in the present embodiment, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 60%, and the mass percent of seccotine is 40%.
Embodiment 2:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic and seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 80%, and the mass percent of seccotine is 20%.
Embodiment 3:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic and seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 68%, and the mass percent of seccotine is 32%.
Embodiment 4:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic, lead zirconate titanate powder, seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 40%, the mass percent of lead zirconate titanate powder is 45%, and the mass percent of seccotine is 15%.
Embodiment 5:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic, lead zirconate titanate powder, seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 30%, the mass percent of lead zirconate titanate powder is 40%, and the mass percent of seccotine is 30%.
Embodiment 6:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic, lead zirconate titanate powder, seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 30%, the mass percent of lead zirconate titanate powder is 60%, and the mass percent of seccotine is 10%.
Embodiment 7:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic, quartz crystal powder, seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 25%, the mass percent of quartz crystal powder is 55%, and the mass percent of seccotine is 20%.
Embodiment 8:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic, quartz crystal powder, seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 40%, the mass percent of quartz crystal powder is 50%, and the mass percent of seccotine is 10%.
Embodiment 9:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, the wherein liquid magnetic filler mixture that liquid magnetic, quartz crystal powder, seccotine are formed of serving as reasons, the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 30%, the mass percent of quartz crystal powder is 40%, and the mass percent of seccotine is 30%.
Embodiment 10:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, wherein liquid magnetic filler is formed by liquid magnetic, lead zirconate titanate powder, the method that lead zirconate titanate powder and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core, wherein the mass percent of lead zirconate titanate powder is 55%, and the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 45%.
Embodiment 11:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, wherein liquid magnetic filler is formed by liquid magnetic, lead zirconate titanate powder, the method that lead zirconate titanate powder and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core, wherein the mass percent of lead zirconate titanate powder is 68%, and the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 32%.
Embodiment 12:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, wherein liquid magnetic filler is formed by liquid magnetic, lead zirconate titanate powder, the method that lead zirconate titanate powder and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core, wherein the mass percent of lead zirconate titanate powder is 62%, and the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 38%.
Embodiment 13:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, wherein liquid magnetic filler is formed by liquid magnetic, quartz crystal powder, the method that quartz crystal powder and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core, wherein the mass percent of quartz crystal powder is 55%, and the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 45%.
Embodiment 14:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, wherein liquid magnetic filler is formed by liquid magnetic, quartz crystal powder, the method that quartz crystal powder and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core, wherein the mass percent of quartz crystal powder is 68%, and the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 32%.
Embodiment 15:
As embodiment 1 described liquid-magnetism filled high-frequency transformer, wherein liquid magnetic filler is formed by liquid magnetic, quartz crystal powder, the method that quartz crystal powder and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core, wherein the mass percent of quartz crystal powder is 62%, and the mass percent of liquid magnetic (being produced by Shanghai Xingshen Instrument Co., Ltd.) is 38%.
More than the technical scheme that the embodiment of the invention provided is described in detail, used specific case herein the principle and the execution mode of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1, a kind of liquid-magnetism filled high-frequency transformer comprises magnetic core, following magnetic core and coil, it is characterized in that: described going up between magnetic core and the following magnetic core is provided with coil, and the described magnetic gap of going up between magnetic core and the following magnetic core is filled with liquid magnetic filler.
2, liquid-magnetism filled high-frequency transformer as claimed in claim 1, it is characterized in that: described liquid magnetic filler is mixed by liquid magnetic and seccotine, the mass percent of described liquid magnetic is 60%～80%, and the mass percent of described seccotine is 20%～40%.
3, liquid-magnetism filled high-frequency transformer as claimed in claim 2 is characterized in that: described liquid magnetic filler is mixed by liquid magnetic and seccotine, and the mass percent of described liquid magnetic is 68%, and the mass percent of described seccotine is 32%.
4, liquid-magnetism filled high-frequency transformer as claimed in claim 1 is characterized in that: described liquid magnetic filler is mixed by liquid magnetic, piezo-electric material powder and seccotine.
5, liquid-magnetism filled high-frequency transformer as claimed in claim 4, it is characterized in that: described piezoelectric is a lead zirconate titanate, the mass percent of described liquid magnetic is 30%～40%, the mass percent of described lead zirconate titanate powder is 40%～60%, and the mass percent of described seccotine is 10%～30%.
6, liquid-magnetism filled high-frequency transformer as claimed in claim 4, it is characterized in that: described piezoelectric is a quartz crystal, the mass percent of described liquid magnetic is 25%～40%, the mass percent of described quartz crystal powder is 40%～65%, and the mass percent of described seccotine is 10%～30%.
7, liquid-magnetism filled high-frequency transformer as claimed in claim 1, it is characterized in that: described liquid magnetic filler is mixed by liquid magnetic, piezo-electric material powder, and the method that described piezoelectric and liquid magnetic flux are crossed photocuring is fixed in the magnetic gap between magnetic core and the following magnetic core.
8, liquid-magnetism filled high-frequency transformer as claimed in claim 7 is characterized in that: described piezoelectric is a lead zirconate titanate, and the mass percent of described lead zirconate titanate powder is 55%～68%, and the mass percent of described liquid magnetic is 32%～45%.
9, liquid-magnetism filled high-frequency transformer as claimed in claim 7 is characterized in that: described piezoelectric is a quartz crystal, and the mass percent of described quartz crystal powder is 55%～68%, and the mass percent of described liquid magnetic is 32%～45%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100366534A CN101651017B (en) | 2009-01-14 | 2009-01-14 | Liquid-magnetism filled high-frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100366534A CN101651017B (en) | 2009-01-14 | 2009-01-14 | Liquid-magnetism filled high-frequency transformer |
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| Publication Number | Publication Date |
|---|---|
| CN101651017A true CN101651017A (en) | 2010-02-17 |
| CN101651017B CN101651017B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100366534A Expired - Fee Related CN101651017B (en) | 2009-01-14 | 2009-01-14 | Liquid-magnetism filled high-frequency transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065771A (en) * | 2013-01-04 | 2013-04-24 | 广州金升阳科技有限公司 | Method for increasing air gap magnetic core inductance coefficient |
| CN103077806A (en) * | 2013-01-04 | 2013-05-01 | 广州金升阳科技有限公司 | Self-excited push-pull type converter |
| CN104992827A (en) * | 2015-07-23 | 2015-10-21 | 深圳开立生物医疗科技股份有限公司 | Liquid magnetic transformer |
| CN103077806B (en) * | 2013-01-04 | 2016-11-30 | 广州金升阳科技有限公司 | A kind of self-excited push-pull type transducer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002217042A (en) * | 2001-01-18 | 2002-08-02 | Nec Tokin Corp | Inductance component and manufacturing method thereof |
| CN2476863Y (en) * | 2001-05-30 | 2002-02-13 | 乙淑巧 | Transformer |
| CN201359903Y (en) * | 2009-01-14 | 2009-12-09 | 郑州乾新电子有限公司 | Liquid magnetic filled high-frequency transformer |
-
2009
- 2009-01-14 CN CN2009100366534A patent/CN101651017B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065771A (en) * | 2013-01-04 | 2013-04-24 | 广州金升阳科技有限公司 | Method for increasing air gap magnetic core inductance coefficient |
| CN103077806A (en) * | 2013-01-04 | 2013-05-01 | 广州金升阳科技有限公司 | Self-excited push-pull type converter |
| CN103077806B (en) * | 2013-01-04 | 2016-11-30 | 广州金升阳科技有限公司 | A kind of self-excited push-pull type transducer |
| CN103065771B (en) * | 2013-01-04 | 2017-08-25 | 广州金升阳科技有限公司 | A kind of method for improving inductance coefficient of air gap magnetic core |
| CN104992827A (en) * | 2015-07-23 | 2015-10-21 | 深圳开立生物医疗科技股份有限公司 | Liquid magnetic transformer |
| CN104992827B (en) * | 2015-07-23 | 2017-12-12 | 深圳开立生物医疗科技股份有限公司 | A kind of liquid magnetic transformer |
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| CN101651017B (en) | 2012-07-18 |
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