CN203013486U - Micro flyback transformer - Google Patents
Micro flyback transformer Download PDFInfo
- Publication number
- CN203013486U CN203013486U CN 201220615298 CN201220615298U CN203013486U CN 203013486 U CN203013486 U CN 203013486U CN 201220615298 CN201220615298 CN 201220615298 CN 201220615298 U CN201220615298 U CN 201220615298U CN 203013486 U CN203013486 U CN 203013486U
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- magnetic core
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- flyback transformer
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Abstract
The utility model discloses a micro flyback transformer, which includes a base, a main magnetic core, a shielded magnetic core and a winding, wherein at least a set of conductive pins are arranged on the base; the main magnetic core and the shielded magnetic core form a closed magnetic circuit with a small air gap; annular winding space is reserved on the main magnetic core; and the winding is positioned in the annular winding space and is made of one set or multiple sets of enameled wire(s) in a winding manner. In this way, as the winding is positioned in the annular winding space, no additional frame is required, the size of the transformer is greatly reduced, and the manufacture cost of the transformer is decreased. The transformer can provide three input/output paths at most, and can form the closed magnetic circuit together with the shielded magnetic core and the main magnetic core, so that the problem about influences on EMI by magnetic leakage is solved satisfactorily, particularly, when the micro flyback transformer is applied in a high frequency (greater than 200kHz) switching power supply, the leakage inductance can be less than 1.5%. The micro flyback transformer is a flyback transformer, which has the characteristics of small size, low leakage inductance, low magnetic leakage, high insulation property and capability of providing multi-path output and the like.
Description
Technical field
The utility model relates to the field transformer technology, refers in particular to a kind of miniature flyback transformer.
Background technology
Inverse-excitation type (Flyback) transformer, or claim transducer to claim again single-ended flyback or " Buck-Boost " transducer obtains energy so gain the name because of its output when the winding deenergization of former limit.
Along with the development of electron trade, high frequency transformer has been proposed new higher.Safety, environmental protection, energy-conservation, volume is little, lightweight, stable and reliable for performance, be easy to realize that batch automatic production is the inexorable trend of electronic devices and components development.Yet, extra skeleton is adopted in the making of flyback transformer at present mostly, makes the volume of flyback transformer larger, has improved the cost of manufacture of product, and all there are the defectives such as high leakage inductance, high magnetic leakage in existing flyback transformer, is having a strong impact on the serviceability of product.
The utility model content
In view of this, the utility model is for the disappearance of prior art existence, and its main purpose is to provide a kind of miniature flyback transformer, can effectively solve the problem that existing volume of transformer is large, cost of manufacture is high, serviceability is poor.
For achieving the above object, the utility model adopts following technical scheme:
A kind of miniature flyback transformer includes base, main magnetic core, shielding magnetic core and winding; Be provided with at least one group of conductive pin on this base, each conductive pin all has wire wrap terminal and is connected pad, this wire wrap terminal be connected pad and all expose outside base; This main magnetic core and shielding magnetic core all are fixed on base, form a closed magnetic circuit with small air gap by this main magnetic core and shielding magnetic core, has the ring winding space on this main magnetic core, this winding is arranged in this ring winding space, this winding is formed by one or more groups enamelled wire coiling, and the line tail of this winding is around on the wire wrap terminal of aforementioned correspondence and is electrically connected to.
As a kind of preferred version, described main magnetic core includes between the upper and lower every two circular baffle plate that arrange and one and is connected in cylinder between this two circular baffle plate, this cylindrical diameter forms aforementioned ring winding space less than the diameter of circular baffle plate, this winding is arranged on this cylinder.
As a kind of preferred version, the profile of described shielding magnetic core is square, and the center of this shielding magnetic core offers the manhole suitable with the aforementioned circle baffle plate, and on this main magnetic core, the circular baffle plate of side is exposed this manhole.
As a kind of preferred version, be provided with cavity on described base, under aforementioned main magnetic core, the circular baffle plate of side is embedded in this cavity, and offers the groove that the line tail for winding stretches out on the two opposite sides edge of this base, and this groove is communicated with this cavity.
As a kind of preferred version, the two opposite sides of described shielding magnetic core all offer groove, the make progress bending and being accommodated in corresponding groove of this wire wrap terminal.
As a kind of preferred version, described conductive pin is three groups, this three groups of conductive pins and base produced by insert molding.
As a kind of preferred version, described each conductive pin all has an aforementioned wire wrap terminal and is connected aforementioned connection pad, wherein two connect the left side that pad exposes base, and all the other four connect the right side that pad exposes base, and the both sides, front and back of this base are distributed with three aforementioned wire wrap terminals.
As a kind of preferred version, be provided with one deck insulating tape between described two groups of adjacent enamelled wires.
As a kind of preferred version, the outermost layer bag of described winding is provided with 1～3 layer of insulating tape.
As a kind of preferred version, described main magnetic core and shielding magnetic core are nickel-zinc-ferrite material, and this main magnetic core and shielding magnetic core are fixed on base by epoxy glue.
The utility model compared with prior art has obvious advantage and beneficial effect, particularly, and as shown from the above technical solution:
one, by be provided with the ring winding space on main magnetic core, utilize this winding to be arranged in this ring winding space, need not use extra skeleton, greatly reduce small product size, and reduced the cost of manufacture of product, this product can provide 3 tunnel I/O at most, coordinate simultaneously shielding magnetic core and main magnetic core to form closed magnetic circuit, solved well the impact of magnetic dispersion on EMI, especially at high frequency (〉 200KHz) during Switching Power Supply uses, leakage inductance can be accomplished below 1.5%, this product is a small size that has, low leakage inductance, low magnetic leakage, , high insulating property and the flyback transformer that the characteristics such as multichannel output can be provided.
Two, by adopting nickel-zinc-ferrite material to make main magnetic core 20 and shielding magnetic core 30, to reach the requirement of high insulation and high operate frequency, because nickel-zinc ferrite has high resistance resistance characteristic, thereby need not just can satisfy the requirement of primary and secondary 2700VDC to doing the insulation processing between main magnetic core, shielding magnetic core and winding, can make magnetic core cost 10%, for manufacturing enterprise brings more economic benefit.
For more clearly setting forth architectural feature of the present utility model and effect, below in conjunction with accompanying drawing and specific embodiment, the utility model is elaborated.
Description of drawings
Fig. 1 is the assembling schematic perspective view of the preferred embodiment of the utility model;
Fig. 2 is the exploded view of the preferred embodiment of the utility model;
Fig. 3 is the sectional view of the preferred embodiment of the utility model;
Fig. 4 is the sectional view after the preferred embodiment assembling of the utility model is completed.
The accompanying drawing identifier declaration:
10, base 101, cavity
102, opening 103, groove
20, main magnetic core 21, circular baffle plate
22, cylinder 201, ring winding space
30, shielding magnetic core 301, manhole
302, groove 40, winding
41, enamelled wire 401, line tail
50, conductive pin 51, wire wrap terminal
52, connect pad.
Embodiment
Please refer to Fig. 1 to shown in Figure 4, the concrete structure that it has demonstrated the preferred embodiment of the utility model includes base 10, main magnetic core 20, shielding magnetic core 30 and winding 40.
wherein, be provided with at least one group of conductive pin 50 on this base 10, each group conductive pin 50 includes two conductive pins 50, each conductive pin 50 all has wire wrap terminal 51 and is connected pad 52, this wire wrap terminal 51 be connected pad 52 and all expose outside base 10, this connects pad 52 and is used for being connected with exterior PC B, in the present embodiment, this conductive pin 50 is three groups, these three groups of conductive pins 50 and base 10 produced by insert molding, this each conductive pin 50 all has an aforementioned wire wrap terminal 51 and is connected aforementioned connection pad 52, wherein two connect the left side that pad 52 exposes base 10, all the other four connect the right side that pad 52 exposes base 10, the both sides, front and back of this base 10 are distributed with three aforementioned wire wrap terminals 51, can can provide 3 tunnel I/O at most with this utility model, make it not only can be used for common inductor, and can be applied in transformer.
this main magnetic core 20 and shielding magnetic core 30 all are fixed on base 10, in the present embodiment, this main magnetic core 20 and shielding magnetic core 30 are nickel-zinc-ferrite material, to reach the requirement of high insulation and high operate frequency, because nickel-zinc ferrite has high resistance resistance characteristic, thereby need not main magnetic core 20, shielding magnetic core 30 and 40 of windings are done to insulate to process just can satisfy the requirement of primary and secondary 2700VDC, this point can make magnetic core cost 10%, this main magnetic core 20 and shielding magnetic core 30 are fixed on base 10 by epoxy glue, form a closed magnetic circuit with small air gap by this main magnetic core 20 and shielding magnetic core 30, to satisfy the requirement of main inductance, bias current inductance and magnetic screen, well solved the impact of magnetic dispersion on EMI, especially at high frequency (〉 200KHz) during Switching Power Supply uses, and leakage inductance can be accomplished below 1.5%, has ring winding space 201 on this main magnetic core 20, this winding 40 is arranged in this ring winding space 201, this winding 40 is formed by one or more groups enamelled wire 41 coilings, the line tail 401 of this winding 40 is around on the wire wrap terminal 51 of aforementioned correspondence and is electrically connected to, in the present embodiment, this enamelled wire 41 is three groups, be provided with one deck insulating tape (not shown) between two groups of adjacent enamelled wires 41, and, the outermost layer bag of this winding 40 is provided with 1～3 layer of insulating tape (not shown), so that fixedly winding 40 and control shield the position of magnetic core 30 and main magnetic core 20 to reach the purpose of controlling inductance tolerance.
In addition, specifically say, this main magnetic core 20 includes between the upper and lower every two circular baffle plate 21 that arrange and one and is connected in cylinder 22 between this two circular baffle plate 21, the diameter of this cylinder 22 forms aforementioned ring winding space 201 less than the diameter of circular baffle plate 21, this winding 40 is arranged on this cylinder 22; The profile of this shielding magnetic core 30 is square, the center of this shielding magnetic core 30 offers the manhole 301 suitable with aforementioned circle baffle plate 21, on this main magnetic core 20, the circular baffle plate 21 of side is exposed this manhole 301, and, the two opposite sides of this shielding magnetic core 30 all offer groove 302, upwards bending and being accommodated in corresponding groove 302 of this wire wrap terminal 51 does not affect product size; And, be provided with cavity 101 on this base 10, under aforementioned main magnetic core 20, the circular baffle plate 21 of side is embedded in this cavity 101, the left and right sides of this cavity 101 all has an opening 102, this opening 102 is sealed by the left and right sides of this shielding magnetic core 30, and the groove 103 that the line tail 401 that offers confession winding 40 on the two opposite sides edge of this base 10 stretches out, this groove 103 is communicated with these cavitys 101, and corresponding each wire wrap terminal 51 is provided with an aforementioned grooves 103.
The assembling process that the present embodiment is described in detail in detail is as follows:
During assembling, at first winding 40 is arranged in the ring winding space 201 of main magnetic core 20, each conductive pin 50 is arranged and with base 10 produced by insert molding; Then, in the downside circular baffle plate 21 embedding cavitys 101 with main magnetic core 20, and be fixed on base 10 by epoxy glue; Then, the line tail of winding 40 is around in electrical connection on corresponding wire wrap terminal 51, then, will shield magnetic core 30 by epoxy glue and be fixed on base 10, and make wire wrap terminal 51 upwards bending be accommodated in this groove 302, assemble complete (as shown in Figure 4), the utility model can provide multiple secondary winding, is applied among anti-driver transformer, and low leakage inductance requirement can be provided, can satisfy primary and secondary 2700VDC, the requirement of 2 seconds.
design focal point of the present utility model is: at first, by be provided with the ring winding space on main magnetic core, utilize this winding to be arranged in this ring winding space, need not use extra skeleton, greatly reduce small product size, and reduced the cost of manufacture of product, this product can provide 3 tunnel I/O at most, coordinate simultaneously shielding magnetic core and main magnetic core to form closed magnetic circuit, solved well the impact of magnetic dispersion on EMI, especially at high frequency (〉 200KHz) during Switching Power Supply uses, leakage inductance can be accomplished below 1.5%, this product is a small size that has, low leakage inductance, low magnetic leakage, , high insulating property and the flyback transformer that the characteristics such as multichannel output can be provided.Secondly, make main magnetic core 20 and shielding magnetic core 30 by adopting nickel-zinc-ferrite material, to reach the requirement of high insulation and high operate frequency, because nickel-zinc ferrite has high resistance resistance characteristic, thereby need not just can satisfy the requirement of primary and secondary 2700VDC to doing the insulation processing between main magnetic core, shielding magnetic core and winding, can make magnetic core cost 10%, for manufacturing enterprise brings more economic benefit.
The above, it is only preferred embodiment of the present utility model, be not that technical scope of the present utility model is imposed any restrictions, therefore every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment does.
Claims (10)
1. a miniature flyback transformer, is characterized in that: include base, main magnetic core, shielding magnetic core and winding; Be provided with at least one group of conductive pin on this base, each conductive pin all has wire wrap terminal and is connected pad, this wire wrap terminal be connected pad and all expose outside base; This main magnetic core and shielding magnetic core all are fixed on base, form a closed magnetic circuit with small air gap by this main magnetic core and shielding magnetic core, has the ring winding space on this main magnetic core, this winding is arranged in this ring winding space, this winding is formed by one or more groups enamelled wire coiling, and the line tail of this winding is around on the wire wrap terminal of aforementioned correspondence and is electrically connected to.
2. miniature flyback transformer according to claim 1, it is characterized in that: described main magnetic core includes between the upper and lower every two circular baffle plate that arrange and one and is connected in cylinder between this two circular baffle plate, this cylindrical diameter forms aforementioned ring winding space less than the diameter of circular baffle plate, this winding is arranged on this cylinder.
3. miniature flyback transformer according to claim 2, it is characterized in that: the profile of described shielding magnetic core is square, the center of this shielding magnetic core offers the manhole suitable with the aforementioned circle baffle plate, and on this main magnetic core, the circular baffle plate of side is exposed this manhole.
4. miniature flyback transformer according to claim 2, it is characterized in that: be provided with cavity on described base, under aforementioned main magnetic core, the circular baffle plate of side is embedded in this cavity, and offers the groove that the line tail for winding stretches out on the two opposite sides edge of this base, and this groove is communicated with this cavity.
5. miniature flyback transformer according to claim 1, it is characterized in that: the two opposite sides of described shielding magnetic core all offer groove, the make progress bending and being accommodated in corresponding groove of this wire wrap terminal.
6. miniature flyback transformer according to claim 1, it is characterized in that: described conductive pin is three groups, this three groups of conductive pins and base produced by insert molding.
7. miniature flyback transformer according to claim 6, it is characterized in that: described each conductive pin all has an aforementioned wire wrap terminal and is connected aforementioned connection pad, wherein two connect the left side that pad exposes base, all the other four connect the right side that pad exposes base, and the both sides, front and back of this base are distributed with three aforementioned wire wrap terminals.
8. miniature flyback transformer according to claim 1, is characterized in that: be provided with one deck insulating tape between described two groups of adjacent enamelled wires.
9. miniature flyback transformer according to claim 1, it is characterized in that: the outermost layer bag of described winding is provided with 1～3 layer of insulating tape.
10. miniature flyback transformer according to claim 1 is characterized in that: described main magnetic core and shielding magnetic core are nickel-zinc-ferrite material, and this main magnetic core and shielding magnetic core are fixed on base by epoxy glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615298 CN203013486U (en) | 2012-11-20 | 2012-11-20 | Micro flyback transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615298 CN203013486U (en) | 2012-11-20 | 2012-11-20 | Micro flyback transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203013486U true CN203013486U (en) | 2013-06-19 |
Family
ID=48605053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220615298 Expired - Lifetime CN203013486U (en) | 2012-11-20 | 2012-11-20 | Micro flyback transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203013486U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103400685A (en) * | 2013-07-18 | 2013-11-20 | 广安市华蓥山领创电子有限公司 | Frame of ultrathin inductor and production method of ultrathin inductor |
| CN103680848A (en) * | 2013-12-31 | 2014-03-26 | 周涛 | High-and-low frequency transformer |
| CN104347240A (en) * | 2014-10-09 | 2015-02-11 | 东莞建冠塑胶电子有限公司 | Thin inductance coil |
| CN104377023A (en) * | 2014-11-27 | 2015-02-25 | 广州金升阳科技有限公司 | Current transformer |
| CN106910609A (en) * | 2017-02-24 | 2017-06-30 | 深圳市京泉华科技股份有限公司 | Inductor fabrication approach and inductor |
| CN107025985A (en) * | 2017-03-23 | 2017-08-08 | 西北核技术研究所 | Tesla magnetic core of transformers and transformer with cushion and the magnetic core preparation method |
| CN107659129A (en) * | 2017-09-26 | 2018-02-02 | 安徽大学 | A kind of plate type common mode differential mode magnetic integrated filter |
| CN108933071A (en) * | 2018-08-16 | 2018-12-04 | 成都凯赛尔电子有限公司 | The fixed structure and fixing means of silicon wafer and the cathode assembly of X-ray tube |
| CN109215985A (en) * | 2018-08-27 | 2019-01-15 | 东莞市大忠电子有限公司 | A kind of high stability mobile transformer |
| CN110534320A (en) * | 2019-09-09 | 2019-12-03 | 苏州欧普照明有限公司 | Inductance framework structure, inductance device and lamps and lanterns |
-
2012
- 2012-11-20 CN CN 201220615298 patent/CN203013486U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103400685B (en) * | 2013-07-18 | 2016-03-16 | 广安市华蓥山领创电子有限公司 | The manufacture method of a kind of super thin inductive skeleton and super thin inductive |
| CN103400685A (en) * | 2013-07-18 | 2013-11-20 | 广安市华蓥山领创电子有限公司 | Frame of ultrathin inductor and production method of ultrathin inductor |
| CN103680848A (en) * | 2013-12-31 | 2014-03-26 | 周涛 | High-and-low frequency transformer |
| CN104347240A (en) * | 2014-10-09 | 2015-02-11 | 东莞建冠塑胶电子有限公司 | Thin inductance coil |
| CN104347240B (en) * | 2014-10-09 | 2016-12-07 | 东莞建冠塑胶电子有限公司 | Thin induction coil |
| CN104377023A (en) * | 2014-11-27 | 2015-02-25 | 广州金升阳科技有限公司 | Current transformer |
| CN106910609B (en) * | 2017-02-24 | 2019-02-01 | 深圳市京泉华科技股份有限公司 | Inductor fabrication approach and inductor |
| CN106910609A (en) * | 2017-02-24 | 2017-06-30 | 深圳市京泉华科技股份有限公司 | Inductor fabrication approach and inductor |
| CN107025985B (en) * | 2017-03-23 | 2019-02-05 | 西北核技术研究所 | Tesla magnetic core of transformer and transformer with buffer layer and the magnetic core preparation method |
| CN107025985A (en) * | 2017-03-23 | 2017-08-08 | 西北核技术研究所 | Tesla magnetic core of transformers and transformer with cushion and the magnetic core preparation method |
| CN107659129A (en) * | 2017-09-26 | 2018-02-02 | 安徽大学 | A kind of plate type common mode differential mode magnetic integrated filter |
| CN108933071A (en) * | 2018-08-16 | 2018-12-04 | 成都凯赛尔电子有限公司 | The fixed structure and fixing means of silicon wafer and the cathode assembly of X-ray tube |
| CN108933071B (en) * | 2018-08-16 | 2024-03-22 | 成都凯赛尔光电有限公司 | Silicon wafer fixing structure and method and cathode component of X-ray tube |
| CN109215985A (en) * | 2018-08-27 | 2019-01-15 | 东莞市大忠电子有限公司 | A kind of high stability mobile transformer |
| CN109215985B (en) * | 2018-08-27 | 2023-11-21 | 东莞市大忠电子有限公司 | High-stability vehicle-mounted transformer |
| CN110534320A (en) * | 2019-09-09 | 2019-12-03 | 苏州欧普照明有限公司 | Inductance framework structure, inductance device and lamps and lanterns |
| CN110534320B (en) * | 2019-09-09 | 2024-07-30 | 苏州欧普照明有限公司 | Inductance skeleton texture, inductance device and lamps and lanterns |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |
|
| CX01 | Expiry of patent term |