CN107993814A - A kind of flat surface transformer of compensation electromagnetic interference - Google Patents
A kind of flat surface transformer of compensation electromagnetic interference Download PDFInfo
- Publication number
- CN107993814A CN107993814A CN201711128338.5A CN201711128338A CN107993814A CN 107993814 A CN107993814 A CN 107993814A CN 201711128338 A CN201711128338 A CN 201711128338A CN 107993814 A CN107993814 A CN 107993814A
- Authority
- CN
- China
- Prior art keywords
- coil
- electromagnetic interference
- flat surface
- surface transformer
- compensation
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- 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
- H01F27/2804—Printed windings
-
- 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
- H01F27/33—Arrangements for noise damping
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- 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
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
-
- 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
- H01F27/2804—Printed windings
- H01F2027/2819—Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of flat surface transformer of compensation electromagnetic interference, including the two a pair of magnetic cores that can mutually assemble, one of magnetic core is I type magnetic cores, another magnetic core is E-type magnetic core, mutually be assembled together composition magnetic circuit, further includes one piece of integrated printed wiring board being embedded in into E-type magnetic core, and primary coil, the ancillary coil of flat surface transformer primary side are equipped with the integrated printed wiring board, and the secondary coil of secondary side, it is characterised in that：The electromagnetic interference bucking coil of flat surface transformer primary side is additionally provided with the integrated printed wiring board, the electromagnetic interference bucking coil is arranged between secondary coil and primary coil, the electromagnetic interference bucking coil peripheral edge covers copper sheet equipped with the whole compensation of size and reconfigurable, distribution capacity is formed between secondary coil, the present invention can significantly compensate the electromagnetic interference of flat surface transformer, effectively suppress electromagnetic noise, prevent other periphery delicate electronic devices to be subject to electromagnetic interference under high frequency utilization.
Description
Technical field
The present invention relates to transformer, more particularly to a kind of flat surface transformer of compensation electromagnetic interference.
Background technology
Transformer be in Switching Power Supply supply (Switch Mode Power Supply, initialism SMPS) can not or
Scarce basic composition device, carries the electrical isolation of power transmission and electric power safety working regulation (abbreviation safety) requirement
Effect.Its medium/high frequency transformer can meet the frivolous and portable requirement of power supply because it is with the characteristic such as small, light-weight.
With the development of switch power technology, and under the trend that power density is persistently lifted to transformer miniaturization, slimming
It is required that it is higher and higher, transformer winding and multiple-level stack are realized by printed wiring on a printed-wiring board, can cause plane
Transformer size minimizes and flattening, and still, there are serious electromagnetic interference (Electromagnetic
Interference, initialism EMI) problem.Existing common compensation electromagnetic interference (Shielding EMI) scheme is increase
The EMI FILTER part such as common mode, differential mode inductance, is disturbed with compensation electromagnetic, suppresses electromagnetic noise.However, consumer
Limited in electronic product be subject to the leakage current of space, cost and safety requirement etc. is multifactor, it is difficult to increase more electromagnetism
Interference filter device, is disturbed with compensation electromagnetic, suppresses electromagnetic noise.
The content of the invention
The technical problems to be solved by the invention are the defects of making up the above-mentioned prior art, there is provided a kind of compensation electromagnetic interference
Flat surface transformer.
The flat surface transformer of this compensation electromagnetic interference, including the two a pair of magnetic cores that can mutually assemble, one of them
Magnetic core is I type magnetic cores, another magnetic core is E-type magnetic core, and be mutually assembled together composition magnetic circuit, further includes one piece and is embedded in into E types
The integrated circuit board of magnetic core, interior primary coil, the ancillary coil for being equipped with flat surface transformer primary side of the integrated printed wiring board,
And the secondary coil of secondary side.
The characteristics of flat surface transformer of this compensation electromagnetic interference is：
The electromagnetic interference bucking coil of flat surface transformer primary side is additionally provided with the integrated circuit board, the electromagnetism is done
Disturb bucking coil to be arranged between secondary coil and primary coil, it is big that the electromagnetic interference bucking coil peripheral edge is equipped with area
Copper sheet is covered in the small and whole compensation of reconfigurable, and distribution capacity is formed between secondary coil, is disturbed with notable compensation electromagnetic, suppresses
Electromagnetic noise, effectively prevents other periphery delicate electronic devices to be subject to electromagnetic interference under high frequency utilization.
The technical problem of the present invention is solved by technical solution further below.
The size of copper sheet is covered in the compensation and shape is determined by the capacity for the distribution capacity compensated being actually needed.
Shielded layer is equipped between the secondary coil of secondary side and the primary coil of primary side, the function of the shielded layer is
Shield electromagnetic interference.
The technical problem of the present invention is solved by following further technical solution.
The primary side be armature winding be the armature winding of simple layer and be connected with each other at least two layers it is primary around
One kind in group.
Balance shield layer, the balance are equipped between the primary coil of the adjacent primary side of the secondary coil of secondary side
Shielded layer is equipped with bucking coil, for balancing the electricity of the distribution between the primary coil of primary side and the secondary coil of secondary side
Hold.
Compared with the prior art, the invention has the advantages that：
The present invention can significantly compensate the electromagnetic interference of flat surface transformer, effectively suppress electromagnetic noise, under high frequency utilization
Other periphery delicate electronic devices are prevented to be subject to electromagnetic interference.
Brief description of the drawings
Fig. 1 is the stereogram of the specific embodiment of the invention one；
Fig. 2 is the disintegration structure chart of Fig. 1；
Fig. 3 is the composition figure of the integrated printed wiring board of Fig. 2；
Fig. 4 is the electromagnetic interference compensative winding schematic diagram of the specific embodiment of the invention two；
Fig. 5 is the electromagnetic interference compensative winding schematic diagram of the specific embodiment of the invention three；
Fig. 6 is the electromagnetic interference compensative winding schematic diagram of the specific embodiment of the invention four；
Fig. 7 is the electromagnetic interference compensative winding schematic diagram of the specific embodiment of the invention five；
Fig. 8 is the electromagnetic interference compensative winding schematic diagram of the specific embodiment of the invention six；
Fig. 9 is the electromagnetic interference compensative winding schematic diagram of the specific embodiment of the invention seven.
Embodiment
With reference to embodiment and compare attached drawing the present invention will be described.
Embodiment one
The flat surface transformer of compensation electromagnetic interference as shown in Figures 1 to 3 a kind of, including can mutually assemble two are a pair of
Magnetic core, magnetic core is I types magnetic core 11 on one of them, another lower magnetic core is E-type magnetic core 12, and be mutually assembled together composition magnetic
Road, further includes one piece of integrated printed wiring board 20 being embedded in into E-type magnetic core, is set successively from top to bottom in integrated printed wiring board 20
There are primary coil 201, the ancillary coil 202 of flat surface transformer primary side, and the secondary coil 203 of secondary side and primary side
Primary coil 206, primary coil 201 and primary coil 206 are connected with each other.Magnetic core center pillar 13 passes through 20 shape of integrated printed wiring board
Into closed magnetic circuit, multiple conductive objects 1 are further included.
The electromagnetic interference bucking coil 205 of flat surface transformer primary side, electromagnetism are additionally provided with integrated printed wiring board 20
Interference compensation coil 205 is arranged between secondary coil 203, shielded layer 204 and primary coil 206, electromagnetic interference bucking coil
205 peripheral edges cover copper sheet 207 equipped with the whole compensation of size and reconfigurable, and distribution is formed between secondary coil 203
Capacitance, is disturbed with notable compensation electromagnetic, suppresses electromagnetic noise, and other periphery delicate electronic devices are effectively prevented under high frequency utilization
It is subject to electromagnetic interference.The size of copper sheet 207 is covered in compensation and shape is determined by the capacity for being actually needed the distribution capacity compensated
It is fixed.
Balance shield layer is equipped between the primary coil 206 of the adjacent primary side of the secondary coil 203 of secondary side
204, the function of shielded layer 204 is shielding electromagnetic interference.Balance shield layer 204 is equipped with bucking coil 208, for balancing once
Distribution capacity between the primary coil of side and the secondary coil of secondary side.
Embodiment two
Substantially form with embodiment one, the compensation difference lies in 205 peripheral edge of electromagnetic interference bucking coil is covered
207 size of copper sheet is different with shape, as shown in Figure 4.
Embodiment three
Substantially form with embodiment one, the compensation difference lies in 205 peripheral edge of electromagnetic interference bucking coil is covered
207 size of copper sheet is different with shape, as shown in Figure 5.
Embodiment four
Substantially form with embodiment one, the compensation difference lies in 205 peripheral edge of electromagnetic interference bucking coil is covered
207 size of copper sheet is different with shape, as shown in Figure 6.
Embodiment five
Substantially form with embodiment one, the compensation difference lies in 205 peripheral edge of electromagnetic interference bucking coil is covered
207 size of copper sheet is different with shape, as shown in Figure 7.
Embodiment six
Substantially form with embodiment one, the compensation difference lies in 205 peripheral edge of electromagnetic interference bucking coil is covered
207 size of copper sheet is different with shape, as shown in Figure 8.
Embodiment seven
Substantially form with embodiment one, the compensation difference lies in 205 peripheral edge of electromagnetic interference bucking coil is covered
207 size of copper sheet is different with shape, as shown in Figure 9.
Above content is that a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted.
Claims (5)
1. a kind of flat surface transformer of compensation electromagnetic interference, including the two a pair of magnetic cores that can mutually assemble, one of magnetic
Core is I type magnetic cores, another magnetic core is E-type magnetic core, and be mutually assembled together composition magnetic circuit, further includes one piece and is embedded in into E-type magnetic
The integrated printed wiring board of core, the interior primary coil equipped with flat surface transformer primary side of the integrated printed wiring board, auxiliary line
Circle, and the secondary coil of secondary side, it is characterised in that：
The electromagnetic interference bucking coil of flat surface transformer primary side is additionally provided with the integrated printed wiring board, the electromagnetism is done
Disturb bucking coil to be arranged between secondary coil and primary coil, it is big that the electromagnetic interference bucking coil peripheral edge is equipped with area
Copper sheet is covered in the small and whole compensation of reconfigurable, and distribution capacity is formed between secondary coil, is disturbed with notable compensation electromagnetic.
2. the flat surface transformer of compensation electromagnetic interference as claimed in claim 1, it is characterised in that：
The size of copper sheet is covered in the compensation and shape is determined by the capacity for being actually needed the distribution capacity compensated.
3. the flat surface transformer of compensation electromagnetic interference as claimed in claim 1 or 2, it is characterised in that：
Shielded layer is equipped between the secondary coil of secondary side and the primary coil of primary side.
4. the flat surface transformer of the compensation electromagnetic interference as described in right wants 3, it is characterised in that：
The primary side is that armature winding is in the armature winding of simple layer and at least two layers of the armature winding being connected with each other
One kind.
5. the flat surface transformer of the compensation electromagnetic interference as described in right wants 4, it is characterised in that：
Balance shield layer, the balance shield are equipped between the primary coil of the adjacent primary side of the secondary coil of secondary side
Layer is equipped with bucking coil, for balancing the distribution capacity between the primary coil of primary side and the secondary coil of secondary side.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128338.5A CN107993814A (en) | 2017-11-15 | 2017-11-15 | A kind of flat surface transformer of compensation electromagnetic interference |
| BR112020009411-0A BR112020009411A2 (en) | 2017-11-15 | 2018-11-15 | planar transformer and method to reduce noise in common mode in a planar transformer |
| PCT/EP2018/081347 WO2019096892A1 (en) | 2017-11-15 | 2018-11-15 | A planar transformer and a method for reducing common-mode noise in a planar transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128338.5A CN107993814A (en) | 2017-11-15 | 2017-11-15 | A kind of flat surface transformer of compensation electromagnetic interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107993814A true CN107993814A (en) | 2018-05-04 |
Family
ID=62030997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711128338.5A Pending CN107993814A (en) | 2017-11-15 | 2017-11-15 | A kind of flat surface transformer of compensation electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107993814A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019096892A1 (en) * | 2017-11-15 | 2019-05-23 | Salcomp Oyj | A planar transformer and a method for reducing common-mode noise in a planar transformer |
| EP3576113A1 (en) * | 2018-05-31 | 2019-12-04 | Salcomp Oyj | A planar transformer and a method for shielding windings in a planar transformer |
| EP3576114A1 (en) * | 2018-05-31 | 2019-12-04 | Salcomp Oyj | A planar transformer and a method for reducing common-mode noise in a planar transformer |
| WO2021088299A1 (en) * | 2019-11-08 | 2021-05-14 | 深圳市航嘉驰源电气股份有限公司 | Planar transformer, circuit board having same and power converter |
| EP3979277A4 (en) * | 2019-06-14 | 2022-08-17 | Huawei Technologies Co., Ltd. | Planar transformer, power conversion circuit, and adapter |
| CN115295288A (en) * | 2022-08-30 | 2022-11-04 | 苏州力生美半导体有限公司 | Planar transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19912634A1 (en) * | 1999-03-20 | 2000-09-21 | Knick Elektronische Mesgeraete | Voltage converter in planar technology has gap in shielding surfaces neighboring to each other and defining primary and secondary coil |
| CN103943340A (en) * | 2007-06-12 | 2014-07-23 | 西门子公司 | Power transformer with one-way flux compensation function |
| CN104183373A (en) * | 2013-05-24 | 2014-12-03 | 台达电子工业股份有限公司 | Transformer |
| CN205264477U (en) * | 2015-11-09 | 2016-05-25 | 赛尔康技术（深圳）有限公司 | Planar transformer |
| CN206546763U (en) * | 2017-03-02 | 2017-10-10 | 深圳市鸿泰达实业有限公司 | A kind of vehicular high-power flat-plate transformer |
-
2017
- 2017-11-15 CN CN201711128338.5A patent/CN107993814A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19912634A1 (en) * | 1999-03-20 | 2000-09-21 | Knick Elektronische Mesgeraete | Voltage converter in planar technology has gap in shielding surfaces neighboring to each other and defining primary and secondary coil |
| CN103943340A (en) * | 2007-06-12 | 2014-07-23 | 西门子公司 | Power transformer with one-way flux compensation function |
| CN104183373A (en) * | 2013-05-24 | 2014-12-03 | 台达电子工业股份有限公司 | Transformer |
| CN205264477U (en) * | 2015-11-09 | 2016-05-25 | 赛尔康技术（深圳）有限公司 | Planar transformer |
| CN206546763U (en) * | 2017-03-02 | 2017-10-10 | 深圳市鸿泰达实业有限公司 | A kind of vehicular high-power flat-plate transformer |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019096892A1 (en) * | 2017-11-15 | 2019-05-23 | Salcomp Oyj | A planar transformer and a method for reducing common-mode noise in a planar transformer |
| EP3576113A1 (en) * | 2018-05-31 | 2019-12-04 | Salcomp Oyj | A planar transformer and a method for shielding windings in a planar transformer |
| EP3576114A1 (en) * | 2018-05-31 | 2019-12-04 | Salcomp Oyj | A planar transformer and a method for reducing common-mode noise in a planar transformer |
| CN110556240A (en) * | 2018-05-31 | 2019-12-10 | 萨尔康普有限公司 | Planar transformer and method for shielding a winding in a planar transformer |
| EP3979277A4 (en) * | 2019-06-14 | 2022-08-17 | Huawei Technologies Co., Ltd. | Planar transformer, power conversion circuit, and adapter |
| WO2021088299A1 (en) * | 2019-11-08 | 2021-05-14 | 深圳市航嘉驰源电气股份有限公司 | Planar transformer, circuit board having same and power converter |
| WO2021088298A1 (en) * | 2019-11-08 | 2021-05-14 | 深圳市航嘉驰源电气股份有限公司 | Planar transformer, power converter, and circuit board |
| CN113632185A (en) * | 2019-11-08 | 2021-11-09 | 深圳市航嘉驰源电气股份有限公司 | Planar transformer, circuit board with same and power converter |
| CN115295288A (en) * | 2022-08-30 | 2022-11-04 | 苏州力生美半导体有限公司 | Planar transformer |
| CN115295288B (en) * | 2022-08-30 | 2024-03-22 | 苏州力生美半导体有限公司 | Planar transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107993814A (en) | A kind of flat surface transformer of compensation electromagnetic interference | |
| CN103559977B (en) | The magnetic devices of power converter | |
| CN201138608Y (en) | Novel planar transformer | |
| EP2345047A2 (en) | Inductive and capacitive components integration structure | |
| CN208141988U (en) | transformer and electromagnetic device | |
| CN110301019B (en) | Transformer and switching power supply | |
| CN101615496B (en) | Integrating type magnetic component | |
| CN104882260A (en) | Planar transformer | |
| CA2342164A1 (en) | Planar transformer | |
| CN108022730B (en) | Transformer and assembling method thereof | |
| CN202662441U (en) | Planar transformer for light-emitting diode (LED) lighting tube | |
| CN212694976U (en) | Novel transformer structure | |
| CN206471205U (en) | A kind of adjustable flat surface transformer | |
| US11903122B2 (en) | Anti-interference circuit board and terminal | |
| CN103943332A (en) | Winding design method for multi-winding output planar transformer | |
| CN204577235U (en) | Flat surface transformer | |
| CN115359998B (en) | Planar transformer with compensation capacitor | |
| CN208608014U (en) | Electromagnetic device and integrated transformer | |
| CN115295288B (en) | Planar transformer | |
| CN205039047U (en) | Stromatolite power inductance of magnetic circuit structure | |
| CN209859743U (en) | Printed board transformer assembly structure with one-path input and four-path output | |
| CN213905090U (en) | Planar transformer and electronic equipment | |
| CN217640953U (en) | Planar transformer | |
| CN214175820U (en) | Planar transformer | |
| CN211427961U (en) | Planar transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180504 |
|
| RJ01 | Rejection of invention patent application after publication |