CN101174502A - Low-leakage inductance transformer device - Google Patents
Low-leakage inductance transformer device Download PDFInfo
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- CN101174502A CN101174502A CNA2007100124466A CN200710012446A CN101174502A CN 101174502 A CN101174502 A CN 101174502A CN A2007100124466 A CNA2007100124466 A CN A2007100124466A CN 200710012446 A CN200710012446 A CN 200710012446A CN 101174502 A CN101174502 A CN 101174502A
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Abstract
The invention relates to a low leakage inductance transformer, belonging to a transformer, which comprises an iron core (1) and a winding. A plurality of iron core windows (3) and a plurality of by pass magnetic columns (2) are arranged on the iron core (1), a primary winding (6) is wound on the a plurality of by pass magnetic columns (2) in the iron core windows (3) at the left and right sides or one side, a secondary winding (4) and a turn secondary winding (5) are respectively wound on each by pass magnetic column (2) in the two adjacent iron core windows (3), the secondary winding (4) and the turn secondary winding (5) are connected in parallel into a chief secondary winding, because the transformer adopts an iron core structure and a winding structure, the turn of the primary winding is at least one, the minimization of the leakage inductance of the transformer is realized, the voltage stress of a switching tube is reduced, the electromagnetic interference is decreased, the safe operation of a power switch is ensured, the switch loss is reduced, the efficiency of the transformer and a switching power is enhanced, and the energy sources are saved.
Description
Technical field
The invention belongs to a kind of transformer, particularly a kind of low-leakage inductance transformer device.
Background technology
Advantages such as in recent years, Switching Power Supply is little, in light weight, low in energy consumption with its efficient height, volume, stability is high, dynamic corresponding is fast and being used widely.But along with improving constantly of switching frequency, the electromagnetic environment of power supply inside becomes increasingly complex, and the electromagnetic interference of Chan Shenging has a strong impact on the operate as normal of Switching Power Supply itself and peripheral electronic device thereof thereupon.Wherein, the leakage inductance as the transformer of Switching Power Supply core component is one of main source of electromagnetic interference.This is because the switching tube of Switching Power Supply when high speed turn-off, is understood the leakage inductance L at transformer
kLast generation induced electromotive force
Be superimposed upon on the shutoff voltage of Transformer Winding, form the shutoff voltage spike, these due to voltage spikes not only cause electromagnetic interference, also can cause the voltage stress of switching device to increase, weight person's possibility breakdown switch pipe, influence the safe operation of Switching Power Supply, and increase switching loss, reduce the efficient of Switching Power Supply.In the past, the method that people reduce leakage inductance has following several usually: 1, under the prerequisite that volume of transformer allows, increase area of core section reducing umber of turn, this is because square being directly proportional of the leakage inductance of transformer and umber of turn; 2, adopt flat surface transformer; 3, reduce insulation thickness between the winding of former and deputy limit; 4, increase the winding height; 5, adopt the staggered coiling of former and deputy limit winding.Wherein, first method is the effective method that reduces leakage inductance, but in the past owing to be subjected to the restriction of the volume of transformer and the turn ratio, the minimizing of umber of turn is limited.Therefore, the leakage inductance that reduces transformer is very important.
Summary of the invention
The objective of the invention is to overcome above-mentioned technical deficiency, provide a kind of enforcement convenient, the realization umber of turn minimizes, and makes leakage inductance become square multiple and the order of magnitude to reduce, and is applicable to the low-leakage inductance transformer device of various power transformers, high-frequency switch power transformer and various flat surface transformers.
The technical scheme that technical solution problem of the present invention adopts is: a kind of low-leakage inductance transformer device of being made up of unshakable in one's determination and winding, be characterized on iron core, being provided with a plurality of windows unshakable in one's determination and a plurality of magnetic post along separate routes unshakable in one's determination, be wound with former limit winding on the shunt magnetic post a plurality of unshakable in one's determination in the window unshakable in one's determination of an and arranged on left and right sides or a side, be wound with secondary winding one and secondary winding two respectively on each the shunt magnetic post unshakable in one's determination between adjacent two window unshakable in one's determination, secondary winding one and secondary winding two are connected in parallel as total secondary winding; Window unshakable in one's determination is made " fourth " font and is formed a plurality of magnetic posts along separate routes unshakable in one's determination, and former limit winding is placed on homonymy unshakable in one's determination with the end of secondary winding one, secondary side winding two or tosses about or become an angle of 90 degrees placement, interlaced coiling.
The invention has the beneficial effects as follows: because above-mentioned core construction of transformer adopting and winding construction, make that former limit umber of turn is minimum to have only a circle, the effective turn of secondary winding is fractional turns (less than a circle), has realized minimizing of transformer leakage inductance, thereby reduces the shutoff voltage spike of switching tube in the Switching Power Supply, reduce the voltage stress of switching tube, reduce electromagnetic interference, guarantee the safe operation of Switching Power Supply, and reduce switching loss, improve the efficient of transformer and Switching Power Supply, energy savings.
Description of drawings
Specify with embodiment below in conjunction with accompanying drawing.
Fig. 1 shows a kind of low-leakage inductance transformer device structure master schematic diagram.
The structural perspective of the low-leakage inductance transformer device of the embodiment two of Fig. 2 diagrammatic sketch 1.
Among the figure, the 1-iron core; 2-magnetic post along separate routes unshakable in one's determination; 3-window unshakable in one's determination; 4-secondary winding one; 5-secondary winding two; The former limit of 6-winding; 7-loam cake unshakable in one's determination; The 8-arrow;
Embodiment
Embodiment one: with reference to accompanying drawing 1, a kind of low-leakage inductance transformer device, form by iron core 1 and winding, be characterized on unshakable in one's determination 1, being provided with three windows 3 unshakable in one's determination and two magnetic posts 2 along separate routes unshakable in one's determination, on two between the window unshakable in one's determination 3 of left and right side shunt magnetic posts 2 unshakable in one's determination, be wound with the former limit of circle winding 6, on each the magnetic post 2 along separate routes unshakable in one's determination between two adjacent windows unshakable in one's determination 3, be wound with a circle secondary winding 1 respectively and 25, two secondary windings one 4,25 of a circle secondary winding are connected in parallel as total secondary winding; Former limit winding 6 is placed on unshakable in one's determination 1 homonymy or toss about (homonymy in this accompanying drawing 1) with the end of secondary winding 1 and secondary winding 25, and arrow 8 is the sense of current.The turn ratio of former and deputy limit winding is 2: 1, and the leakage inductance of this transformer is reduced to 1/4th of traditional transformer approximately.
Embodiment two, with reference to accompanying drawing 2, a kind of low-leakage inductance transformer device, form by iron core 1 and winding, be characterized on unshakable in one's determination 1, being provided with window unshakable in one's determination 3 and two magnetic posts 2 along separate routes unshakable in one's determination of " fourth " font, unshakable in one's determinationly be wound with the former limit of circle winding 6 on the magnetic posts 2 along separate routes at two, on each magnetic post 2 along separate routes unshakable in one's determination respectively around a circle secondary winding 4 and a circle secondary winding 5, two secondary windings one 4,25 are connected in parallel as total secondary winding, the coiling that can interlock of former limit winding 6 and secondary winding one 4,25; The end of two secondary windings one 4,25 becomes an angle of 90 degrees to place with the end of former limit winding 6, arrow 8 is the sense of current, and the turn ratio of former and deputy limit winding is 2: 1, and the leakage inductance of transformer is reduced to 1/4th of traditional transformer approximately.
Embodiment three, if former and deputy limit winding turns is than being N: 1, wherein, former limit winding N is the integer greater than 2, N magnetic post 2 along separate routes then arranged on unshakable in one's determination 1, on this N shunt magnetic post 2, is wound with the former limit of circle winding 6, on this N shunt magnetic post 2 respectively around a circle secondary winding, as total secondary winding, the leakage inductance of this transformer is reduced to the 1/N of traditional transformer approximately with their parallel connections
2
Embodiment four, if N is bigger, and N is an even number, in order to reduce the volume of iron core 1, the number of turn of former limit winding 6 is made as 2 circles, and 1 has N/2 along separate routes magnetic post 2 on iron core, on this N/2 shunt magnetic post 2 unshakable in one's determination respectively around 1 circle secondary winding, with their parallel connections as total secondary winding, but this moment transformer leakage inductance be when being 1 circle 4 times of the number of turn of former limit winding 6.
Embodiment five, if N is bigger, and N is 3 multiple, in order to reduce the volume of iron core 1, the number of turn of former limit winding 6 is made as 3 circles, N/3 magnetic post 2 is along separate routes arranged on unshakable in one's determination 1, on this N/3 iron core shunt magnetic post 2 respectively around 1 circle secondary winding, with their parallel connections as total secondary winding, but this moment transformer leakage inductance be when being 1 circle 9 times of the number of turn of former limit winding 6; The rest may be inferred.
Embodiment six, if former and deputy limit umber of turn is than being N: M, wherein, secondary winding M be the integer less than N, then on iron core shunt magnetic post respectively around M circle secondary winding, all the other are identical with embodiment three.
Claims (2)
1. low-leakage inductance transformer device, form by (1) unshakable in one's determination and winding, it is characterized in that on (1) unshakable in one's determination, being provided with a plurality of windows unshakable in one's determination (3) and a plurality of shunt magnetic posts (2), be wound with former limit winding (6) on a plurality of shunt magnetic posts (2) in the window unshakable in one's determination (3) of an and arranged on left and right sides or a side, in two adjacent windows unshakable in one's determination (3) each is wound with a secondary winding one (4) and a circle secondary winding two (5) respectively on the magnetic post (2) along separate routes, and secondary winding one (4) and secondary winding two (5) are connected in parallel becomes total secondary winding.
2. low-leakage inductance transformer device according to claim 1, it is characterized in that window unshakable in one's determination (3) makes " fourth " font and form a plurality of magnetic posts (2) along separate routes unshakable in one's determination, former limit winding (6) becomes an angle of 90 degrees placement with the end of secondary winding one (4) and secondary winding two (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100124466A CN101174502A (en) | 2007-08-09 | 2007-08-09 | Low-leakage inductance transformer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100124466A CN101174502A (en) | 2007-08-09 | 2007-08-09 | Low-leakage inductance transformer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101174502A true CN101174502A (en) | 2008-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100124466A Pending CN101174502A (en) | 2007-08-09 | 2007-08-09 | Low-leakage inductance transformer device |
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| Country | Link |
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| CN (1) | CN101174502A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686538A (en) * | 2018-12-11 | 2019-04-26 | 华为技术有限公司 | A kind of transformer and power supply |
| CN110706903A (en) * | 2019-10-16 | 2020-01-17 | 台达电子企业管理（上海）有限公司 | Integrated magnetic element |
-
2007
- 2007-08-09 CN CNA2007100124466A patent/CN101174502A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686538A (en) * | 2018-12-11 | 2019-04-26 | 华为技术有限公司 | A kind of transformer and power supply |
| WO2020119471A1 (en) * | 2018-12-11 | 2020-06-18 | 华为技术有限公司 | Transformer and power supply |
| CN109686538B (en) * | 2018-12-11 | 2020-07-28 | 华为技术有限公司 | Transformer and power supply |
| US11862377B2 (en) | 2018-12-11 | 2024-01-02 | Huawei Technologies Co., Ltd. | Transformer and power supply |
| CN110706903A (en) * | 2019-10-16 | 2020-01-17 | 台达电子企业管理（上海）有限公司 | Integrated magnetic element |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080507 |