CN202930161U - Flat transformer - Google Patents
Flat transformer Download PDFInfo
- Publication number
- CN202930161U CN202930161U CN 201220643906 CN201220643906U CN202930161U CN 202930161 U CN202930161 U CN 202930161U CN 201220643906 CN201220643906 CN 201220643906 CN 201220643906 U CN201220643906 U CN 201220643906U CN 202930161 U CN202930161 U CN 202930161U
- Authority
- CN
- China
- Prior art keywords
- winding
- magnetic core
- transformer
- flat
- flat transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004804 winding Methods 0.000 claims abstract description 55
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound 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[Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 3
- 230000001808 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 210000003491 Skin Anatomy 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The utility model discloses a flat transformer, comprising two primary windings and a secondary winding, wherein the primary windings and the secondary winding are arranged in magnetic core grooves; the flat transformer is characterized in that magnetic cores include a square upper magnetic core and a square lower magnetic core, and the secondary winding is arranged between the two primary windings; and insulation layers are arranged among the primary windings and the secondary windings. The flat transformer mainly consists of the upper magnetic core, the lower magnetic core, the primary windings and the secondary winding; the number of turns of the primary windings and the secondary winding is less, so that the structure of the flat transformer is simpler, and the automatic assembly is facilitated; and the flat transformer has the advantages of small size, good current distribution, good heat dissipation, high current density and high power density.
Description
Technical field
The utility model relates to power transformer, is specifically related to a kind of Switching Power Supply flat surface transformer.
Background technology
Transformer is a key element in power supply, and it has high frequency, and the characteristics of low moulding are namely highly very little and operating frequency is very high; Traditional transformer is made of FERRITE CORE and copper coil usually, and is bulky and easily produce electromagnetic interference.
At present, in the middle of the design of flat transformer, utilize independent copper sheet or be molded over copper foil layer in circuit board as secondary side winding, be wherein a circle around the number of turn, if according to existing mode, first side winding and secondary side winding are located at respectively the both sides of transformer, these two secondary side copper sheets can because of inconsistent from the different leakage inductances that cause of distance of first side winding, cause the phenomenon of the current imbalance of front and back half cycle in current cycle.
The utility model content
For above-mentioned deficiency of the prior art, the utility model provides that a kind of volume is little, power density is large, the flat surface transformer that efficient is high.
In order to reach the foregoing invention purpose, the technical solution adopted in the utility model is: a kind of flat surface transformer is provided, it comprises armature winding and the secondary winding that is arranged in the magnetic core groove, described magnetic core comprises square upper magnetic core and lower magnetic core, and described secondary winding is arranged between two armature windings; Be provided with insulating barrier between described armature winding and secondary winding.
According to flat transformer described in the utility model, it is characterized in that: described armature winding is after single flat copper wire spiral winding becomes, to carry out punching press with the secondary winding employing, and it is compared with traditional flat surface transformer, and volume reduces greatly; Adopt single coiling avoided many windings and around and shunt; Electric current distributes in the conductor coideal in transmitting procedure, and AC impedance reduces.
According to flat transformer described in the utility model, it is characterized in that: described armature winding arranges two circle coils; Described secondary winding arranges five circle coils; Coil turn is few, is coupled, and leakage inductance is lower.
According to flat transformer described in the utility model, it is characterized in that: described upper magnetic core and lower magnetic core are of a size of 30mm * 20 mm * 5mm, and after upper magnetic core and lower magnetic core were combined, volume of transformer was little, power can reach 600 watts, and current density is 40A/mm2.
In sum, the beneficial effects of the utility model are:
1, this flat transformer mainly is comprised of upper magnetic core, lower magnetic core, armature winding and secondary winding, makes relatively simple for structurely, is conducive to automation assembling; It is little that it also has a volume, CURRENT DISTRIBUTION, the advantage that thermal diffusivity is good, current density is high and power density is high;
2, the number of turn of armature winding and secondary winding is few, has greatly reduced the volume of Transformer Winding; Compare with traditional transformer, this flat transformer has adopted the flat copper lines, although with collection skin benefit, but electric current is to flow through whole cross-sectional area of conductor to amass, conductor utilizes high, and first winding adopts folder to fold and forms coupling well, and leakage inductance is little, and its can be very fast ON/OFF speed and very low switching loss and reduced leakage inductance, can reach very high efficient.
3, be provided with insulating barrier between armature winding and secondary winding, make withstand voltage greater than 5000V between armature winding and secondary winding, isolation is good.
Description of drawings
Fig. 1 is the vertical view of flat transformer;
Fig. 2 is the left view of flat transformer;
Fig. 3 is the cutaway view along A-A line direction in Fig. 1;
Fig. 4 is the enlarged drawing of B section in Fig. 3;
Fig. 5 is the amplification plan view of armature winding and secondary winding.
Wherein, 1, upper magnetic core; 2, lower magnetic core; 3, armature winding; 4, secondary winding; 5, insulating barrier;
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As extremely shown in Figure 5 in Fig. 1, this flat surface transformer comprises armature winding 3 and the secondary winding 4 that is arranged in the magnetic core groove, described magnetic core comprises square upper magnetic core 1 and lower magnetic core 2, described secondary winding 4 is arranged between two armature windings 3, make the magnetic core coupling tightr, reduce leakage reactance, be conducive to improve the conversion efficiency of flat transformer under higher frequency; Be provided with insulating barrier 5 between described armature winding 3 and secondary winding 4; What described armature winding 3 and secondary winding 4 adopted is that single flat copper wire spiral winding forms; Described armature winding 3 arranges two circle coils, and described secondary winding 4 arranges five circle coils, and the number of turn of armature winding 3 and secondary winding 4 is few, and hot path is very short, and heat sheds very soon by magnetic core; Described upper magnetic core 1 and lower magnetic core 2 are of a size of 30mm * 20 mm * 5mm.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also carry out some improvement to the utility model, these improvement also fall in the protection range of the utility model claim.
Claims (4)
1. flat transformer, comprise the armature winding (3) and the secondary winding (4) that are arranged in the magnetic core groove, it is characterized in that: described magnetic core comprises square upper magnetic core (1) and lower magnetic core (2), and described secondary winding (4) is arranged between two armature windings (3); Be provided with insulating barrier (5) between described armature winding (3) and secondary winding (4).
2. flat transformer according to claim 1 is characterized in that: what described armature winding (3) and secondary winding (4) adopted is that single flat copper wire spiral winding forms.
, flat transformer according to claim 2, it is characterized in that: described armature winding (3) arranges two circle coils; Described secondary winding (4) arranges five circle coils.
4. the described flat transformer of any one according to claim 1-3, it is characterized in that: described upper magnetic core (1) and lower magnetic core (2) are of a size of 30mm * 20 mm * 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643906 CN202930161U (en) | 2012-11-29 | 2012-11-29 | Flat transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643906 CN202930161U (en) | 2012-11-29 | 2012-11-29 | Flat transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202930161U true CN202930161U (en) | 2013-05-08 |
Family
ID=48220097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220643906 Expired - Fee Related CN202930161U (en) | 2012-11-29 | 2012-11-29 | Flat transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202930161U (en) |
-
2012
- 2012-11-29 CN CN 201220643906 patent/CN202930161U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20171129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |