CN106409485A - Transformer - Google Patents
Transformer Download PDFInfo
- Publication number
- CN106409485A CN106409485A CN201610888528.6A CN201610888528A CN106409485A CN 106409485 A CN106409485 A CN 106409485A CN 201610888528 A CN201610888528 A CN 201610888528A CN 106409485 A CN106409485 A CN 106409485A
- Authority
- CN
- China
- Prior art keywords
- winding
- copper sheet
- power supply
- primary
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/289—Shielding with auxiliary windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
The invention relates to a transformer. The transformer comprises a framework, and a first secondary winding, a first copper shielding layer, a primary winding, a primary VCC auxiliary power supply winding, a second copper shielding layer, and a second secondary winding which are orderly wound on the framework from inside to outside; the first secondary winding and the second secondary winding are connected in parallel; one end of each of the first copper shield layer and the second copper shield layer is suspended, and the other end thereof is connected with a primary ground circuit of the primary VCC auxiliary power supply winding; insulated rubber tapes are respectively wound between every adjacent two of the first secondary winding, the first copper shielding layer, the primary winding, the primary VCC auxiliary power supply winding, the second copper shielding layer and the second secondary winding and also wound at the outer side of the second secondary winding; and through the ingenious combination of the various windings, the copper shield layers and the insulated rubber tapes, the distribution capacitance and leakage inductance of the transformer can be adjusted to a suitable value to meet the requirement of an EMI test specification.
Description
Technical field
The present invention relates to a kind of high-frequency power transformer of specific combination structure.
Background technology
Most of adapter on market carrys out copped wave converting electrical energy using the high speed turn-on and turn-off of power device, due to work(
The high speed turn-on and turn-off of rate device can lead to the quick change of the electric current flowing through and voltage, produces higher voltage and electric current point
Peak, is the main cause producing EMI inside Switching Power Supply.
At present, the Normal practice reducing the EMI interference within Switching Power Supply is additional snubber circuit, in system front end
Plus wave filter, X electric capacity and Y capacitance, frequently can also improve EMI performance with warbled pulse width modulator using having to tremble.Adopt
Although being made moderate progress to EMI with certain methods above, can not be absolute ensure the test by EMI for the adapter.Must be
Improve on circuit and transformer device structure, adapter just can be made to meet EMI standard.This patent is made by improving transformer device structure
Transformer distribution capacity and leakage inductance are adjusted to a desired value, to meet the excellent beneficial effect of EMI test specification requirement.
Content of the invention
Object of the present invention is to provide a kind of high-frequency power transformer of specific combination structure.
Make transformer distribution capacity and leakage inductance be adjusted to a desired value, so that switching power circuit EMI is tested and ensure abundance
Allowance.
For realizing object defined above, the present invention adopts the following technical scheme that：A kind of transformer, it includes skeleton and from inside to outside
It is wound on the first secondary windings on skeleton, the first copper sheet screen layer, armature winding, primary VCC auxiliary power supply winding, the second bronze medal
Skin screen layer, second subprime winding, described first secondary windings is identical with the number of turns of second subprime winding technique and is connected in parallel on one
Rise, the respective end of the first copper sheet screen layer and the second copper sheet screen layer is hanging, another end and primary VCC auxiliary power supply around
The earth-return of group connects, described first secondary windings, the first copper sheet screen layer, armature winding, primary VCC auxiliary power supply winding,
It is wound with insulating tape respectively between second copper sheet screen layer, second subprime winding are adjacent two-by-two and outside second subprime winding.
Transformer of the present invention, by the ingenious combination between each winding, copper sheet screen layer and insulating tape, makes transformer divide
Cloth electric capacity and leakage inductance are adjusted to a desired value, to meet the excellent beneficial effect of EMI test specification requirement.Due to increase secondary around
Group and other windings contact area, by the shielding of copper sheet screen layer, it is possible to reduce secondary windings and other around coupling
Electric capacity.Copper sheet screen layer be wound on secondary windings and other around between, and be connected to primary of primary VCC auxiliary power supply winding
Loop, makes secondary windings and the coefficient of coup of other windings reduce, thus increased leakage inductance.Transformer of the present invention can will be distributed
Electric capacity and leakage inductance are adjusted to a desired value, are easy to meet the requirement of EMI test specification.
Using transformer of the present invention, the test of switching power circuit conduction can be made to ensure sufficient allowance, practical, and
The more conventional way of various functions has more preferable lifting, and simplifies designed lines, and cost of implementation is cheap, and enforcement simply has
Effect.
Brief description
Fig. 1 is the functional block diagram of the present invention
Fig. 2 is the structural representation of transformer of the present invention.
Specific embodiment
Fig. 1 is the functional block diagram of reverse exciting switching voltage regulator, and power transformer is connected to primary and secondary, is the key of electric energy conversion
Element.Electrically and physically winding method has great shadow to the performance of whole Switching Power Supply and reliability to rational power transformer
Ring.In the present embodiment, the high-frequency power transformer of specific combination structure makes electromagnetic interference EMI in power supply have abundance in test
Allowance.
Refer to shown in Fig. 2, transformer of the present invention includes skeleton 10 and is wound on the first time on skeleton 10 from inside to outside
Level winding 21, the first copper sheet screen layer 31, armature winding 40, primary VCC auxiliary power supply winding 50, the second copper sheet screen layer 22,
Second subprime winding 32.Each winding 21,40,50,32 be respectively adopted flood close around.
In transformer each pin definition as Fig. 1 shown in U3：VBUS:The filtered positive voltage of input rectifying；MOS-D:Power
The drain electrode of switch MOSFET；VCC：Primary VCC auxiliary power supply winding positive voltage；GND：Primary VCC auxiliary power supply winding earth-return；
VOUT+：Secondary output positive voltage；VOUT+：Secondary output negative voltage.
First secondary windings 21 and second subprime winding 32 are connected in parallel, and the number of turns of winding technique is identical, for secondary
Output.
One end of the first copper sheet screen layer 31 and the second copper sheet screen layer 22 is hanging, and another end is assisted with primary VCC
Earth-return for electric winding 50 connects.
Two ends of armature winding 40 are connected on VBUS Pin, MOS-D Pin.
First secondary windings 21, the first copper sheet screen layer 31, armature winding 40, primary VCC auxiliary power supply winding 50, second
It is wound with insulating tape respectively between copper sheet screen layer 22, second subprime winding 32 are adjacent two-by-two and outside second subprime winding 32
60.
Transformer of the present invention passes through skilful between each winding 21,40,50,32, copper sheet screen layer 31,22 and insulating tape 60
Wonderful combination, makes transformer distribution capacity and leakage inductance be adjusted to a desired value, to meet the excellent benefit effect of EMI test specification requirement
Really.Due to increasing the contact area of secondary windings 21,32 and other windings, by the shielding of copper sheet screen layer 31,22, permissible
Reduce secondary windings 21,32 and other around coupled capacitor.Copper sheet screen layer 31,22 be wound on secondary windings 21,32 and other
Around between, and be connected to the earth-return of primary VCC auxiliary power supply winding 50, make the coupling of secondary windings 21,32 and other windings
Syzygy number reduces, thus increased leakage inductance.Distribution capacity and leakage inductance can be adjusted to a desired value by transformer of the present invention, just
Require in meeting EMI test specification.
Using transformer of the present invention, the test of switching power circuit conduction can be made to ensure sufficient allowance, practical,
And the more conventional way of various functions has more preferable lifting, and simplify designed lines, cost of implementation is cheap, implement simple
Effectively.
Embodiment described above only have expressed the preferred embodiment of the present invention, its describe more concrete with detail, but simultaneously
Therefore the restriction of the scope of the claims of the present invention and embodiment can not be interpreted as.It should be pointed out that for those skilled in the art
For member, on the premise of conceiving without departing from the present embodiment, some deformation can also be made and improve, these broadly fall into the present invention
Protection domain.
Claims (4)
1. a kind of transformer, it includes skeleton and the first secondary windings being wound on from inside to outside on skeleton, the first copper sheet shield
Layer, armature winding, primary VCC auxiliary power supply winding, the second copper sheet screen layer, second subprime winding it is characterised in that：Described
One secondary windings together with second subprime winding parallel, the first copper sheet screen layer and the respective end of the second copper sheet screen layer
Vacantly, another end is connected with the earth-return of primary VCC auxiliary power supply winding, described first secondary windings, the first copper sheet shielding
Between layer, armature winding, primary VCC auxiliary power supply winding, the second copper sheet screen layer, second subprime winding are adjacent two-by-two and second
It is wound with insulating tape respectively outside secondary windings.
2. transformer according to claim 1 it is characterised in that：Described first secondary windings, armature winding, primary VCC
Auxiliary power supply winding and second subprime winding be respectively adopted flood close around.
3. transformer according to claim 1 it is characterised in that：Described first copper sheet screen layer and the second copper sheet screen layer
An end hanging, another end is connected with the earth-return of primary VCC auxiliary power supply winding.
4. transformer according to claim 1 it is characterised in that：Two ends of described armature winding are connected to MOS-
On D Pin, VBUS Pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888528.6A CN106409485A (en) | 2016-10-12 | 2016-10-12 | Transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888528.6A CN106409485A (en) | 2016-10-12 | 2016-10-12 | Transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106409485A true CN106409485A (en) | 2017-02-15 |
Family
ID=59229073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610888528.6A Pending CN106409485A (en) | 2016-10-12 | 2016-10-12 | Transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106409485A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808759A (en) * | 2017-12-11 | 2018-03-16 | 东莞市港奇电子有限公司 | A kind of transformer and a kind of Switching Power Supply |
| CN112201457A (en) * | 2020-08-26 | 2021-01-08 | 珠海格力电器股份有限公司 | High-frequency transformer winding structure, switching power supply circuit and power adapter |
| CN113436865A (en) * | 2021-06-24 | 2021-09-24 | 珠海格力电器股份有限公司 | Transformer and switching power supply circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202102849U (en) * | 2011-04-25 | 2012-01-04 | 厦门亚锝电子科技有限公司 | High-frequency switching power supply transformer |
| CN203288400U (en) * | 2013-05-24 | 2013-11-13 | 昂宝电子（上海）有限公司 | Transformer used for flyback switch power supply |
| CN203366948U (en) * | 2013-06-03 | 2013-12-25 | 黄国灿 | Transformer |
| TW201506964A (en) * | 2013-08-13 | 2015-02-16 | Asian Power Devices Inc | Transformer |
| CN206163275U (en) * | 2016-10-12 | 2017-05-10 | 昆山联滔电子有限公司 | Transformer |
-
2016
- 2016-10-12 CN CN201610888528.6A patent/CN106409485A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202102849U (en) * | 2011-04-25 | 2012-01-04 | 厦门亚锝电子科技有限公司 | High-frequency switching power supply transformer |
| CN203288400U (en) * | 2013-05-24 | 2013-11-13 | 昂宝电子（上海）有限公司 | Transformer used for flyback switch power supply |
| CN203366948U (en) * | 2013-06-03 | 2013-12-25 | 黄国灿 | Transformer |
| TW201506964A (en) * | 2013-08-13 | 2015-02-16 | Asian Power Devices Inc | Transformer |
| CN206163275U (en) * | 2016-10-12 | 2017-05-10 | 昆山联滔电子有限公司 | Transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808759A (en) * | 2017-12-11 | 2018-03-16 | 东莞市港奇电子有限公司 | A kind of transformer and a kind of Switching Power Supply |
| CN112201457A (en) * | 2020-08-26 | 2021-01-08 | 珠海格力电器股份有限公司 | High-frequency transformer winding structure, switching power supply circuit and power adapter |
| CN113436865A (en) * | 2021-06-24 | 2021-09-24 | 珠海格力电器股份有限公司 | Transformer and switching power supply circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170215 |
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| WD01 | Invention patent application deemed withdrawn after publication |