CN201359903Y - Liquid magnetic filled high-frequency transformer - Google Patents
Liquid magnetic filled high-frequency transformer Download PDFInfo
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- CN201359903Y CN201359903Y CNU2009200501211U CN200920050121U CN201359903Y CN 201359903 Y CN201359903 Y CN 201359903Y CN U2009200501211 U CNU2009200501211 U CN U2009200501211U CN 200920050121 U CN200920050121 U CN 200920050121U CN 201359903 Y CN201359903 Y CN 201359903Y
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Abstract
The utility model relates to the field of electronic equipments and discloses a liquid magnetic filled high-frequency transformer. The liquid magnetic filled high-frequency transformer comprises an upper magnetic core, a lower magnetic core and a coil; the coil is arranged between the upper magnetic core and the lower magnetic core; a magnetic gap between the upper magnetic core and the lower magnetic core is filled with liquid magnetic filling agent made of a liquid magnet and a piezoelectric material. The liquid magnetic filled high-frequency transformer provided by the utility model not only reduces the radiated noises generated by the magnetic leakage and the leakage inductance, but also has the effect of automatically adjusting the inductance value, and the inductance value adjustment is accurate.
Description
Technical field
The utility model 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.
Early stage Switching Power Supply is commonly referred to as " hard switching " technology, in order to solve the technical deficiency of " hard switching ", has developed not only quasi-resonance formula Switching Power Supply (but also claiming soft switching power).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 4, 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.
The utility model content
Be to solve the problem that prior art exists, the utility model 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 utility model 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 the liquid magnetic filler of being made by liquid magnetic and piezoelectric.
Optionally, described liquid magnetic filler contains seccotine, adopts seccotine will go up magnetic core and bonds together with following magnetic core.
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 7).And for liquid magnetic, its H/B curve as shown in Figure 8, 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 9, in the liquid magnetic filler between the utility model magnetic core magnetic gap, 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.
On the other hand, liquid magnetic filler can be regulated inductance value automatically, 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 increased, frequency reduced, thereby the piezoelectric effect amplitude increases, and the magnetism molecule unit are of liquid magnetic increases, and magnetic gap increases, and inductance value reduces, increase frequency, thus realized of the automatic adjusting of liquid magnetic filler to inductance value.
The liquid-magnetism filled high-frequency transformer that the utility model provides has not only reduced the radiated noise that produces because of leakage field, leakage inductance, can also play the effect of automatic adjusting inductance value, and inductance value is accurate.The utility model can well mate 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; Solved the difficult problem of Switching Power Supply more on the one hand because of the inaccurate debug difficulties of bringing of high frequency transformer inductance value.
The utility model 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 utility model, constitutes the application's a part, does not constitute to improper qualification of the present utility model, 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;
Fig. 4 is a quasi-resonance forward converter circuit diagram;
The structural representation of the liquid-magnetism filled high-frequency transformer that Fig. 5 provides for the utility model embodiment;
The assembling schematic diagram of the liquid-magnetism filled high-frequency transformer that Fig. 6 provides for the utility model embodiment;
Fig. 7 is the curve chart of solid-state magnetic magnetic flux density with change of magnetic field strength;
Fig. 8 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. 9 provides for present embodiment is with the curve chart of change of magnetic field strength;
The liquid-magnetism filled high-frequency transformer inductance value that Figure 10 provides for present embodiment is with the curve chart of frequency change.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to qualification of the present utility model.
Shown in Fig. 5,6, 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 3 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 the liquid magnetic filler of being made by liquid magnetic and piezoelectric 4, liquid magnetic filler 4 is filled in both solved the magnetic core saturation problem between the magnetic gap, solved magnetic flux again and can not stride across the problem that air gap arrives other position of magnetic core.
In the present embodiment, can contain seccotine in the liquid magnetic filler, adopt seccotine will go up magnetic core 1 and bond together with following magnetic core 2.
After tested, when being installed in the high frequency transformer of conventional art on the single-end flyback switching power supply, recording the peak voltage that winding causes because of leakage inductance is 100.7V/p-p, and after using the liquid-magnetism filled high-frequency transformer that present embodiment provides instead, when antihunt circuit is installed, peak voltage has only 3.2V/p-p, when not adorning antihunt circuit, also has only 4.27V/p-p.When being installed in the utility model transformer on the quasi-resonant switching power supply, than the high frequency transformer frequency stability raising 10 of conventional art
3Doubly, ripple is than installing low 5.2 times of conventional art high frequency transformer, and efficient improves 16%, and power output increases by 9%.
More than technical scheme that the utility model embodiment is provided be described in detail, used specific case herein principle and the execution mode of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as restriction of the present utility model.
Claims (2)
1, a kind of liquid-magnetism filled high-frequency transformer, comprise 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 the liquid magnetic filler of being made by liquid magnetic and piezoelectric.
2, liquid-magnetism filled high-frequency transformer as claimed in claim 1 is characterized in that: described liquid magnetic filler contains seccotine, adopts seccotine will go up magnetic core and bonds together with following magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200501211U CN201359903Y (en) | 2009-01-14 | 2009-01-14 | Liquid magnetic filled high-frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200501211U CN201359903Y (en) | 2009-01-14 | 2009-01-14 | Liquid magnetic filled high-frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201359903Y true CN201359903Y (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200501211U Expired - Lifetime CN201359903Y (en) | 2009-01-14 | 2009-01-14 | Liquid magnetic filled high-frequency transformer |
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| CN (1) | CN201359903Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651017B (en) * | 2009-01-14 | 2012-07-18 | 郑州傲世实业有限公司 | Liquid-magnetism filled high-frequency transformer |
| RU2476960C2 (en) * | 2011-03-16 | 2013-02-27 | Государственное образовательное учреждение высшего профессионального образования Новгородский государственный университет имени Ярослава Мудрого | Magnetoelectric transformer |
-
2009
- 2009-01-14 CN CNU2009200501211U patent/CN201359903Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651017B (en) * | 2009-01-14 | 2012-07-18 | 郑州傲世实业有限公司 | Liquid-magnetism filled high-frequency transformer |
| RU2476960C2 (en) * | 2011-03-16 | 2013-02-27 | Государственное образовательное учреждение высшего профессионального образования Новгородский государственный университет имени Ярослава Мудрого | Magnetoelectric transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEZHOU AUCS CO., LTD. Free format text: FORMER OWNER: ZHENGZHOU QIANXIN ELECTRONICS CO., LTD. Effective date: 20101126 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 450003 WEST HOUSEHOLD, 6/F, UNIT 1, EAST OF BUILDING 16, YARD 2, HONGYUN ROAD, DISTRICT 27, ZHENGZHOU CITY, HE NAN PROVINCE TO: 450000 FACTORY BUILDING 11, EXPORT PROCESSING ZONE, HANGHAI EAST ROAD, ZHENGZHOU CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101126 Address after: 450000 No. 11 factory building, export processing zone, East Road, Zhengzhou Patentee after: Zhezhou Aucs Co., Ltd. Address before: 450003 Henan province Zhengzhou city 27 District Hongyun Road No. 2 Building No. 16 Hospital East 1 unit 6 West households Patentee before: Zhengzhou Qianxin Electronics Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20091209 Effective date of abandoning: 20090114 |
|
| RGAV | Abandon patent right to avoid regrant |