CN104064322B - The high-efficiency high-frequency pulse transformer of low spurious electromagnetic radiation - Google Patents
The high-efficiency high-frequency pulse transformer of low spurious electromagnetic radiation Download PDFInfo
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- CN104064322B CN104064322B CN201310095046.1A CN201310095046A CN104064322B CN 104064322 B CN104064322 B CN 104064322B CN 201310095046 A CN201310095046 A CN 201310095046A CN 104064322 B CN104064322 B CN 104064322B
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Abstract
The high-efficiency high-frequency pulse transformer of low spurious electromagnetic radiation involved in the present invention, by changing the distribution mode of winding and the flow direction of electric current in winding, the magnetic coupling density between primary and secondary winding is improved, while reduce the intensity of outside resultant flux；Change pattern of the traditional transformer by resultant flux outside armature winding to secondary windings transmission energy, using the inside resultant flux of armature winding to secondary windings transmission energy, the outside resultant flux of armature winding transmits completely irrelevant with energy, the magnetic flux of the magnetic flux of transmission energy and generation electromagnetic interference is completely exfoliated and come, the outside resultant flux for producing electromagnetic interference can be weakened and be shielded by many technological means, while effectively lifting transformer efficiency of transmission and power density, the electromagnetic interference caused by stray radiation is greatly reduced.
Description
Technical field
The present invention relates to high-frequency pulse transformer technology.More particularly to the high-efficiency high frequency arteries and veins of low spurious electromagnetic radiation
Rush transformer.
Background technology
With the continuous progress of power technology, each neck has almost been permeated using the application of the secondary power supply of switching technique
One of domain, the core devices of Switching Power Supply is high-frequency pulse transformer, and the technical bottleneck of high-frequency pulse transformer limits out
The progress in powered-down source, what can be do not exaggerated says --- the performance of high-frequency pulse transformer determines the bulking property of Switching Power Supply
Energy.Up to the present, traditional high-frequency pulse transformer has been difficult to the needs for meeting high-effect high power conversion power supply.Its
Crucial technical bottleneck is：
1st, the power capacity of high-frequency pulse transformer and the volume of transformer are directly proportional, under conditions of given volume, think
The power capacity of transformer is increased, can only be realized by lifting the frequency of conversion electric power.And the raising of frequency can strengthen and lead
The Kelvin effect and approach effect of line, meanwhile, the loss of magnetic core can also increase therewith, for traditional transformer, frequency
Lifting is limited；
2nd, the efficiency of transmission of high-frequency pulse transformer directly affects its power density, and traditional high-power high-frequency pulse becomes
The conversion efficiency of depressor is difficult breakthrough 90%, so not only causes energy waste, adds manufacturing cost, and limit
The reduction of volume is made；
3rd, the energy transmission of high-frequency pulse transformer is to be coupled to secondary windings by the resultant flux of armature winding to enter
Capable, and this magnetic flux can also produce electromagnetic interference simultaneously, that is, carry out magnetic flux of the magnetic flux of energy transmission with producing electromagnetic interference
It is same magnetic flux, the bigger caused electromagnetic interference of power of transmission is also stronger；
What the 4th, pulse transformer transmitted is front and rear along precipitous pulse signal, and its high-frequency harmonic is very abundant, has in transmission
Caused stray electromagnetic irradiation can cause very strong electromagnetic interference while efficiency amount, and be in the increasing interference of power
Geometric progression strengthens.
The content of the invention
The winding of transformer is made up of some circle wires, and magnetic can be all produced around each wire when winding is powered
, the intensity in magnetic field is directly proportional to electric current, and the direction of magnetic flux follows Ampere's law.
The winding of conventional highfrequency pulse transformer uses cluster type coiling, and magnetic flux 3-1 is mutually synthesized caused by single wire
Resultant flux 3-2 is formed afterwards, and the armature winding interlayer inside resultant flux 3-3 of traditional boundling coiling, which cancels out each other, is not involved in energy
Transmission, outside resultant flux 3-4 is by the coupling of magnetic core to secondary windings transmission energy；Closed outside the armature winding of transmission energy
Into magnetic flux 3-4 while transmission energy, electromagnetic interference can be also produced, i.e. transmission energy is same magnetic with producing electromagnetic interference
It is logical.By simply analyzing as can be seen that the basic reason that traditional transformer efficiency is low, interference is big is：Carried out between primary and secondary
The magnetic flux of energy transmission is same magnetic flux with the magnetic flux for producing electromagnetic interference；And only the line is busy circle total number of turns ratio it is seldom around
The peripheral wire of group participates in the synthesis of this magnetic flux, and the magnetic flux of most of winding inner lead is cancelled out each other and is not involved at all
Energy transmits.Therefore the energy transmission efficiency of transformer is low, and power density can not improve, more seriously with transformer work(
The increasing of rate, the electromagnetic interference come with it also increase therewith.
The key of the present invention is：The relative position of armature winding and secondary windings is redistributed, and controls armature winding
Interior sense of current, mould of the traditional transformer by resultant flux outside armature winding to secondary windings transmission energy is overturned
Formula, using the interlayer magnetic flux of armature winding, even turn-to-turn magnetic flux is to secondary windings transmission energy --- i.e. primary and secondary winding energy
The transmission of amount is carried out between winding interior flux, and the outside resultant flux for producing electromagnetic interference is not involved in energy biography completely
It is defeated, realize energy transmission and be completely exfoliated with two magnetic fluxs of electromagnetic interference, it is close in effectively lifting transformer efficiency of transmission and power
While spending, significantly weaken and suppression electromagnetic interference.
By the armature winding of transformer be made individual layer planar coil 1-1,1-2 ... 1-n, while secondary windings is made
Into individual layer planar coil 2-1,2-2,2- (n-1), between two layers of individual layer plane armature winding embedded 1 layer of individual layer planar secondary around
Group, the top and the bottom of the winding assembly after combination are all armature windings；Control the wiring of armature winding so that adjacent two
The anti-phase of layer armature winding, it is possible to which ensureing the inter-layer intra resultant flux 3-3 of armature winding mutually strengthens, outside interlayer
Resultant flux 3-2 cancels out each other；Because secondary windings is distributed in the interlayer of armature winding and armature winding close coupling, between winding
Using inter-layer intra magnetic flux 3-3 transmission energies, outside magnetic flux 3-2 is unrelated with energy transmission.Although the outside of armature winding interlayer
Magnetic flux is cancelled out each other, but the outside resultant flux of the top and bottom coil due to armature winding mutually strengthens, and is produced
The outside resultant flux of armature winding, the magnetic flux have been not involved in energy transmission, electromagnetic interference can have only been produced, by winding assembly
Top and the bottom be respectively embedded into screen layer, the outside resultant flux of top and bottom coil is shielded, can
More effectively to suppress the electromagnetic interference significantly weakened；Screen layer is designed with Insulating gap, prevents closure vortex；
Screen layer is designed with electrical terminal, is grounded as the case may be during practical application or vacantly.
Concentric conductor can also be used to make high-frequency pulse transformer, the inner wire 5-1 of concentric conductor is the first of transformer
Level winding, outer conductor 5-2 are the secondary windings of transformer, parallel distribution between wire；Control the wiring of armature winding so that adjacent
The anti-phase of wire, it is possible to which internal resultant flux 4-2 mutually strengthens between ensureing wire, and outside magnetic flux is cancelled out each other；Due to
Secondary windings is coaxially distributed in outside armature winding and armature winding close coupling, utilizes the inside resultant flux 4-2 of wire to transmit
Energy, outside magnetic flux is unrelated with energy transmission and cancels out each other.Can be more effective in the intercalation screen layer 5-3 of winding assembly
Ground suppresses the electromagnetic interference significantly weakened；Screen layer is designed with Insulating gap 5-4, prevents closure vortex；Shielding
Layer is designed with electrical terminal, is grounded as the case may be during practical application or vacantly.
Brief description of the drawings
Fig. 1：Structural representation
1-1 --- primary planar winding 1；
1-2 --- primary planar winding 2；
1-3 --- primary winding current direction；
2-1 --- secondary plane winding 1.
Fig. 2：Primary current direction schematic diagram
Fig. 3：The first winding construction of traditional transformer and magnetic flux schematic diagram
3-1 --- single turn wire magnetic flux；
Resultant flux outside 3-2 --- winding interlayer；
3-4 --- winding assembly resultant flux.
Fig. 4：The magnetic flux schematic diagram of interlayer anti-phase winding
3-3 --- level winding interlayer resultant flux.
Fig. 5：The magnetic flux schematic diagram of turn-to-turn anti-phase winding
4-1 --- single conductor magnetic flux；
4-2 --- resultant flux between wire.
Fig. 6：Using concentric conductor structure and the magnetic flux schematic diagram of armature winding turn-to-turn anti-phase
5-1 --- concentric conductor inner wire --- armature winding；
5-2 --- concentric conductor outer conductor --- secondary windings；
Fig. 7：Primary and secondary winding is the high-frequency pulse transformer structural representation of concentric conductor
Fig. 8：Columnar structured concentric conductor high-power high-frequency pulse transformer radial cross section with screen layer
5-3 --- interlayer screen layer；
5-4 --- screen layer Insulating gap.
Embodiment
Embodiment one：Armature winding interlayer anti-phase planar high-frequency pulse transformer.
Using the manufacture craft of flat surface transformer, armature winding and secondary windings are divided into multilayer and made, and secondary windings
One layer fewer than the number of plies of secondary windings of the number of plies (i.e. the number of plies of secondary windings is N, then the number of plies of armature winding is N-1), two
Embedded secondary winding layers between layer primary winding layers, top and the bottom are armature winding.
The interlayer wiring of armature winding is connected according to the principle of the primary winding layers anti-phase adjacent with secondary winding layers,
Ensure that interlayer magnetic flux strengthens in secondary windings plane to be mutual inside armature winding.Now, the outside interlayer magnetic flux of armature winding
Cancel out each other, the outside magnetic flux of magnetic flux and the bottom mutually strengthens only outside top, and this part magnetic flux is not involved in energy
Amount conversion, only can produce stray radiation, it should reduce as far as possible, so the unilateral section of armature winding as close possible to circular or
Rectangle.
Secondary windings can have a variety of connected modes, according to the requirement of output voltage and power output, set secondary windings
Connected mode.
Embodiment two：Primary and secondary winding is the high-power high-frequency pulse change of concentric conductor and armature winding turn-to-turn anti-phase
Depressor.
It is to be used as transformer by the use of the cored wire of concentric conductor to make high-power high-frequency pulse transformer using concentric conductor
Armature winding, the secondary windings using the outer conductor of concentric conductor as transformer take the suitable mode of connection, ensure it is primary around
Adjacent wires anti-phase in group, it is possible to the performance for making full use of the turn-to-turn magnetic flux of armature winding mutually to strengthen, to greatest extent
Improve the efficiency of energy transmission between primary and secondary in ground.
Now the turn-to-turn magnetic flux inside armature winding mutually strengthens, and outside resultant flux is almost nil after cancelling out each other,
Electromagnetic interference can be preferably minimized by its stray radiation with regard to almost nil.
Embodiment three：Cylindric primary and secondary winding is big for the ultralow EMI of concentric conductor and armature winding turn-to-turn anti-phase
Power high frequency pulse transformer.
High-power high-frequency pulse transformer is made using concentric conductor, its structure is cylindric --- concentric conductor distribution
Radial section is circular, and the interlayer of winding embeds screen layer, and screen layer is provided with the gap of insertion, prevents screen layer vertically
Induced-current forms circulation, and screen layer is single-ended to have wire to pick out, and supply used time ground connection uses.
By the use of concentric conductor cored wire as transformer armature winding, using the outer conductor of concentric conductor as transformer
Secondary windings, the suitable mode of connection is taken, ensure adjacent wires anti-phase in armature winding, it is possible to make full use of primary
The performance that the turn-to-turn magnetic flux of winding mutually strengthens improves the efficiency of energy transmission between primary and secondary to greatest extent.
Now the turn-to-turn magnetic flux inside armature winding mutually strengthens, and is cancelled out each other in the outside resultant flux of cylindrical radial several
It is zero, the effect of screen layer in addition ensures that its stray radiation is almost nil, therefore electromagnetic interference is preferably minimized.
Claims (6)
1. the high-efficiency novel high-frequency pulse transformer of low spurious electromagnetic radiation；It is characterized in that：The individual layer of flat surface transformer is primary
Winding interlayer embeds individual layer secondary windings；The primary and secondary winding of coaxial configuration transformer is in coaxial distribution；Control in armature winding
The sense of current；The each circle of each layer or coaxial configuration primary winding of planar transformer primary winding is made full use of to lead
Magnetic flux caused by line is to secondary windings transmission energy；While effectively lifting transformer efficiency of transmission and power density, significantly
Reduce transformer because the stray radiation of outside magnetic flux and caused by electromagnetic radiation；Coaxial configuration transformer embeds screen layer can be more
Add and be effectively reduced electromagnetic radiation caused by the outside resultant flux of residual；Wherein, the individual layer primary winding layers of flat surface transformer
Between embed individual layer secondary windings, armature winding and secondary windings are divided into multilayer makes, and the number of plies of secondary windings than it is primary around
The number of plies of group is few one layer, and the embedded primary winding layers between two layers of primary winding layers, top and the bottom are armature winding,
The interlayer wiring of armature winding is connected according to the principle of the primary winding layers anti-phase adjacent with secondary winding layers；Coaxial configuration
The primary and secondary winding of transformer is in coaxial distribution, and the inner wire 5-1 of concentric conductor is the armature winding of transformer, outer conductor 5-2
For the secondary windings of transformer, parallel distribution between wire, the wiring of armature winding is controlled so that the anti-phase of adjacent wires.
2. according to the high-efficiency novel high-frequency pulse transformer of the low spurious electromagnetic radiation described in claim 1, flat surface transformer
Primary and secondary winding there is distinguishing feature；It is characterized in that：Individual layer armature winding 1-1 and individual layer armature winding 1-2 layer
Between embedded individual layer secondary windings 2-1, the number of plies of armature winding is one layer more than secondary windings, during stacking, the most top of coil assembly
Layer and the bottom are all armature windings.
3. according to the high-efficiency novel high-frequency pulse transformer of the low spurious electromagnetic radiation described in claim 1, coaxial configuration becomes
The primary and secondary winding of depressor is in coaxial distribution；It is characterized in that：The inner wire of concentric conductor is armature winding 5-1, and outer conductor is secondary
Level winding 5-2, the distribution of Transformer Winding is in 3D stereochemical structures.
4. according to the high-efficiency novel high-frequency pulse transformer of the low spurious electromagnetic radiation described in claim 1, in controling winding
The sense of current there is distinguishing feature；It is characterized in that：When armature winding interlayer is embedded in the flat surface transformer structure of secondary winding layers,
The interlayer anti-phase 1-3 of armature winding；During coaxial configuration transformer, adjacent inner wire anti-phase.
5. according to the high-efficiency novel high-frequency pulse transformer of the low spurious electromagnetic radiation described in claim 1, flat surface transformer
Using the interlayer resultant flux of armature winding to secondary windings transmission energy；It is characterized in that：Each circle wire production of armature winding
Raw magnetic flux 3-1, after interlayer anti-phase, the interlayer resultant flux 3-3 of armature winding is the mutual enhancing of two layers of magnetic flux；Interlayer
Outside resultant flux 3-2 cancel out each other and decay.
6. according to the high-efficiency novel high-frequency pulse transformer of the low spurious electromagnetic radiation described in claim 1, screen layer is embedded；
It is characterized in that：The coaxial heart of coaxial configuration transformer embeds screen layer 5-3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310095046.1A CN104064322B (en) | 2013-03-22 | 2013-03-22 | The high-efficiency high-frequency pulse transformer of low spurious electromagnetic radiation |
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| CN201310095046.1A CN104064322B (en) | 2013-03-22 | 2013-03-22 | The high-efficiency high-frequency pulse transformer of low spurious electromagnetic radiation |
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| CN104064322B true CN104064322B (en) | 2018-01-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105450010B (en) * | 2014-12-04 | 2018-01-23 | 深圳市高瓴科技有限公司 | The DC DC converters of magnetron+coaxial electronic transformer |
| CN105448490A (en) * | 2014-12-04 | 2016-03-30 | 深圳市高瓴科技有限公司 | High-efficiency ultra-high frequency electronic transformer with coaxial structure |
| CN109900983B (en) * | 2019-02-26 | 2020-07-07 | 北京航空航天大学 | Measuring device for parasitic parameters of high-frequency transformer |
| CN112992476B (en) * | 2021-02-05 | 2022-08-12 | 合肥矽力杰半导体技术有限公司 | Transformer, and package module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1452774A (en) * | 1998-07-06 | 2003-10-29 | 密德康姆股份有限公司 | Multilayer transformer having electrical connection in magnetic core |
| CN201984944U (en) * | 2011-01-20 | 2011-09-21 | 河南中天电气股份有限公司 | Magnetic shielding device for lowering stray loss of transformer |
| CN102867628A (en) * | 2012-09-29 | 2013-01-09 | 湖南大学 | Magnetic integration type integrated filter inductance transformer |
| CN102982969A (en) * | 2012-11-27 | 2013-03-20 | 宁波澳普网络通信设备有限公司 | Pulse transformer |
-
2013
- 2013-03-22 CN CN201310095046.1A patent/CN104064322B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1452774A (en) * | 1998-07-06 | 2003-10-29 | 密德康姆股份有限公司 | Multilayer transformer having electrical connection in magnetic core |
| CN201984944U (en) * | 2011-01-20 | 2011-09-21 | 河南中天电气股份有限公司 | Magnetic shielding device for lowering stray loss of transformer |
| CN102867628A (en) * | 2012-09-29 | 2013-01-09 | 湖南大学 | Magnetic integration type integrated filter inductance transformer |
| CN102982969A (en) * | 2012-11-27 | 2013-03-20 | 宁波澳普网络通信设备有限公司 | Pulse transformer |
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