CN203386595U - High-frequency transformer of switching power supply - Google Patents
High-frequency transformer of switching power supply Download PDFInfo
- Publication number
- CN203386595U CN203386595U CN201320526514.1U CN201320526514U CN203386595U CN 203386595 U CN203386595 U CN 203386595U CN 201320526514 U CN201320526514 U CN 201320526514U CN 203386595 U CN203386595 U CN 203386595U
- Authority
- CN
- China
- Prior art keywords
- coil
- frequency transformer
- power supply
- switching power
- primary
- 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
Abstract
The utility model discloses a high-frequency transformer of a switching power supply. The high-frequency transformer of the switching power supply comprises a framework and a magnetic core, wherein the framework is provided with a winding groove and the magnetic core is arranged in the framework in a penetrating mode. Primary coils, first shielding coils, secondary coils, second shielding coils and feedback coils are wound around the winding groove in sequence from inside to outside. The winding direction of the primary coils is opposite to the winding direction of the secondary coils. According to the high-frequency transformer of the switching power supply, disturbance and radiation of an electromagnetic field can be reduced, stability and safety of working of the switching power supply are ensured, the structure is simple, the overall size of the switching power supply is decreased, the structure of the switching power supply is simplified, and the service life of the switching power supply is prolonged effectively.
Description
Technical field
The utility model relates to a kind of high frequency transformer, relates in particular to a kind of switch power high-frequency transformer.
Background technology
In Switching Power Supply, produce the EMI(electromagnetic interference) reason more, its EMI interference source embodies a concentrated reflection of power switch pipe, rectifier diode and high frequency transformer etc.The EMI of high frequency transformer derives from the conversion of current changing rate corresponding to leakage inductance (di/dt) Rapid Circulation, forms the shutoff voltage spike, thereby causes conductibility electromagnetic interference phenomenon.
Traditional switch power high-frequency transformer comprises the skeleton with winding slot and is located in this intraskeletal magnetic core, be wound with primary coil, secondary coil and feedback coil at the winding slot higher slice, the switch power high-frequency transformer electromagnetic interference of this structure is larger, easily affect other electronic product work, especially in the digital product field, the performance requirement of Switching Power Supply is met to the Electromagnetic Interference Test standard of EN55022, guarantee stability, the fail safe of Switching Power Supply work, so the switch power high-frequency transformer performance just seems particularly important.At present, the EMI first-selection of removal or reduction Switching Power Supply inside is to adopt additional buffering to attract the method for circuit, although additional buffering attracts circuit to be conducive to reduce EMI, can produce too much power consumption, increases number of elements, PCB size and system cost etc. simultaneously.Therefore generally, conventional way is to add stripper and Y electric capacity at system front end, but, because the existence of Y electric capacity can make to produce leakage current between the input and output line, metal-back adapter with Y electric capacity can allow the user that the danger of electric shock is arranged, exist potential safety hazard, therefore, each power supply manufacturer starts to release the various designs without Y electric capacity.
The utility model content
For the deficiencies in the prior art, the utility model proposes a kind of switch power high-frequency transformer, can reduce interference of electromagnetic field radiation, guarantee stability, the fail safe of Switching Power Supply work, compact conformation, dwindle the Switching Power Supply overall volume, simplify the Switching Power Supply structure and effectively extend the Switching Power Supply life-span.
In order to achieve the above object, the technical scheme that the utility model adopts is as follows:
A kind of switch power high-frequency transformer, comprise that one has the skeleton of winding slot and is located in this intraskeletal magnetic core, on described winding slot from inside to outside successively layering be wound with primary coil, the first shielded coil, secondary coil, secondary shielding coil and feedback coil, the direction of winding of described primary coil is contrary with the direction of winding of secondary coil.
Preferably, described primary coil adopts the layering coiling, and it comprises at least one single line ring layer; Wherein, an inner most single line ring layer is designated as the first primary coil layer.
Preferably, described the first shielded coil be multiply and around the single line ring layer; The line end that rises of described the first shielded coil is connected to high-pressure side, and the take-up end is unsettled.
Preferably, 1/3 of the number of turns that the number of turns of described the first shielded coil is described the first primary coil layer.
Preferably, described secondary shielding coil be multiply and around the single line ring layer; A wire end ground of described secondary shielding coil, the take-up end is unsettled.
Preferably, 1/3 of the number of turns that the number of turns of described secondary shielding coil is this first primary coil layer.
Preferably, an end of described skeleton is relatively set with primary side and primary side, and described feedback coil is arranged on the end near primary side.
Compared with prior art, the utility model is by adopting the direction of winding winding pattern contrary with the direction of winding of secondary coil of primary coil, and the electromagnetic interference that the electromagnetic interference that primary coil is produced and the energy of radiation and secondary coil produce and the energy of radiation are cancelled out each other; The utility model is provided with the first shielded coil between primary coil and secondary coil, be provided with the secondary shielding coil between secondary coil and feedback coil, the setting of double shield coil can effectively be played shielding and offset the effect of disturbing, simultaneously the first shielded coil and secondary shielding coil be multiply and around the single line ring layer, 1/3 the number of turns that its coiling number of turns only need reach the first primary coil layer gets final product.Feedback coil by primary side close around, to reduce the effective area that overlaps between feedback coil and secondary coil, reduce disturbance, thereby obtain a clean electromagnetic field, can further reduce the electromagnetic interference energy, make Switching Power Supply in the situation that primary and secondary do not need to connect Y electric capacity the electromagnetic interference (EMI) emissions energy reduced in the international standard scope; It is even zero that the utility model can drop to the primary and secondary leakage current uA level, guarantees stability, Electro Magnetic Compatibility and the fail safe of Switching Power Supply work.
The accompanying drawing explanation
The structural representation that Fig. 1 is the preferred embodiment of the utility model switch power high-frequency transformer.
The winding diagram that Fig. 2 is switch power high-frequency transformer in Fig. 1.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further, understand the utility model technological thought required for protection so that clearer.
Refer to Fig. 1, the utility model relates to a kind of switch power high-frequency transformer, and its better embodiment comprises the skeleton 10 with winding slot and is located in this intraskeletal magnetic core (not shown).
The agent structure part that skeleton 10 is transformer, its effect mainly is to provide the space of winding and for the iron core of stationary transformer for the wire in transformer, be provided with primary side (being high-pressure side) and the primary side of relative distribution at an end of skeleton 10, all be connected with several stitch on primary side and primary side.Those skilled in the art can obtain its concrete structure and operation principle by existing knowledge, repeat no more herein.
In the utility model, on winding slot from inside to outside successively layering be wound with primary coil 100, the first shielded coil 200, secondary coil 300, secondary shielding coil 400 and feedback coil 500.
Primary coil 100 is wound on the innermost layer of winding slot, in the utility model, primary coil 100 adopts the layering coiling, it comprises at least one single line ring layer, in the present embodiment, primary coil 100 arranges three single line ring layers, and wherein an inner most single line ring layer is designated as the first primary coil layer 101; Head and the tail serial connection between two single line ring layers that are connected.
The first shielded coil 200 is wound on the outer surface of primary coil 100, adopt multiply and around form form a single line ring layer, for playing shielding and offsetting the effect of disturbing.1/3 of the number of turns that the number of turns of the first shielded coil 200 is the first primary coil layer, it plays line end and is connected to high-pressure side, and the take-up end is unsettled.
Secondary coil 300 is wound on the outer surface of the first shielded coil 200, and its direction of winding is contrary with the direction of winding of primary coil 100.The utility model adopts the direction of winding winding pattern contrary with the direction of winding of secondary coil 300 of primary coil 100, and the electromagnetic interference that the electromagnetic interference that primary coil is produced and the energy of radiation and secondary coil produce and the energy of radiation are cancelled out each other.Compare and traditional anti-electromagnetic interference mode, from the change of winding pattern, realize that anti-electromagnetic interference is more effective, more convenient, can effectively guarantee stability, the fail safe of Switching Power Supply work.
Secondary shielding coil 400 is wound on the outer surface of secondary coil 300, the same with the first shielded coil 200, also adopt multiply and around form form a single line ring layer, for playing shielding and offsetting the effect of interference.1/3 of the number of turns that the number of turns of secondary shielding coil 200 is the first primary coil layer, it plays wire end ground, and the take-up end is unsettled.
Feedback coil 500 is arranged on the end near primary side, to reduce the effective area that overlaps between feedback coil 500 and secondary coil 300, reduce disturbance, thereby obtain a clean electromagnetic field, further reduce the electromagnetic interference energy, make Switching Power Supply in the situation that primary and secondary do not need to connect Y electric capacity the electromagnetic interference (EMI) emissions energy reduced in the international standard scope.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and the distortion all should belong to the protection range of the utility model claim within.
Claims (7)
1. a switch power high-frequency transformer, comprise that one has the skeleton of winding slot and is located in this intraskeletal magnetic core, it is characterized in that: on described winding slot from inside to outside successively layering be wound with primary coil, the first shielded coil, secondary coil, secondary shielding coil and feedback coil, the direction of winding of described primary coil is contrary with the direction of winding of secondary coil.
2. switch power high-frequency transformer as claimed in claim 1 is characterized in that: described primary coil adopts the layering coiling, and it comprises at least one single line ring layer; Wherein, an inner most single line ring layer is designated as the first primary coil layer.
3. switch power high-frequency transformer as claimed in claim 2 is characterized in that: described the first shielded coil be multiply and around the single line ring layer; The line end that rises of described the first shielded coil is connected to high-pressure side, and the take-up end is unsettled.
4. switch power high-frequency transformer as claimed in claim 3, is characterized in that: 1/3 of the number of turns that the number of turns of described the first shielded coil is described the first primary coil layer.
5. switch power high-frequency transformer as claimed in claim 2 is characterized in that: described secondary shielding coil be multiply and around the single line ring layer; A wire end ground of described secondary shielding coil, the take-up end is unsettled.
6. switch power high-frequency transformer as claimed in claim 5, is characterized in that: 1/3 of the number of turns that the number of turns of described secondary shielding coil is this first primary coil layer.
7. switch power high-frequency transformer as claimed in claim 1, it is characterized in that: an end of described skeleton is relatively set with primary side and primary side, and described feedback coil is arranged on the end near primary side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320526514.1U CN203386595U (en) | 2013-08-27 | 2013-08-27 | High-frequency transformer of switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320526514.1U CN203386595U (en) | 2013-08-27 | 2013-08-27 | High-frequency transformer of switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203386595U true CN203386595U (en) | 2014-01-08 |
Family
ID=49875054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320526514.1U Expired - Fee Related CN203386595U (en) | 2013-08-27 | 2013-08-27 | High-frequency transformer of switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203386595U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474212A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | Switching power supply high-frequency transformer |
-
2013
- 2013-08-27 CN CN201320526514.1U patent/CN203386595U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474212A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | Switching power supply high-frequency transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205080987U (en) | Turn over and swash switching mode power supply transformer | |
| CN105047385A (en) | High-frequency transformer and electronic magnetic interference (EMI) suppression circuit including same | |
| CN202839237U (en) | Non-closed type ring-type iron core transformer | |
| CN203386595U (en) | High-frequency transformer of switching power supply | |
| CN103474210A (en) | Transformer resistant to common code interference | |
| CN202855504U (en) | Modified sandwich winding transformer | |
| CN104064322B (en) | The high-efficiency high-frequency pulse transformer of low spurious electromagnetic radiation | |
| CN102044867A (en) | Device for reducing lightning invasion wave gradient of transformer | |
| CN102881420A (en) | Transformer framework | |
| CN103474212A (en) | Switching power supply high-frequency transformer | |
| CN104157394A (en) | Amorphous magnetic ring inductor facilitating wire winding | |
| CN204390867U (en) | A kind of high frequency transformer | |
| CN203377071U (en) | Common mode interference-resistant transformer | |
| CN203118703U (en) | Common mode choke for improving common-mode radiation interference | |
| CN202736667U (en) | Switching power supply transformer | |
| CN201392726Y (en) | Switch power high-frequency transformer for LED illuminating lamp | |
| CN205845634U (en) | Amorphous magnetic core flat wire is vertical around inductance | |
| CN202094796U (en) | Input power supply filtering circuit device of frequency converter | |
| CN201956156U (en) | Filter | |
| CN105448490A (en) | High-efficiency ultra-high frequency electronic transformer with coaxial structure | |
| CN204926984U (en) | A double -line disc coil for solenoid transformer | |
| CN204905021U (en) | High -frequency transformer and EMI suppression circuit who constitutes thereof | |
| CN203733555U (en) | Transformer for high-frequency power source | |
| CN210743757U (en) | High-frequency transformer shielding structure | |
| CN203536194U (en) | Y-capacitor-free transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160823 Address after: 425000 Industrial Road, Hexi Industrial Zone, Lingling Industrial Zone, Lingling District, Yongzhou, Hunan Patentee after: Hunan tech-power Technology Co., Ltd. Address before: 518100 Guangdong city of Shenzhen province Baoan District Fuyong street community baishixia Longwangmiao Industrial Zone sixteenth, nineteenth Patentee before: Songshun Electronic (Shenzhen) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20180827 |