CN106449053A - High-frequency transformer - Google Patents
High-frequency transformer Download PDFInfo
- Publication number
- CN106449053A CN106449053A CN201610995019.3A CN201610995019A CN106449053A CN 106449053 A CN106449053 A CN 106449053A CN 201610995019 A CN201610995019 A CN 201610995019A CN 106449053 A CN106449053 A CN 106449053A
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- core
- receiving portion
- frequency transformer
- main magnetic
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 239000005300 metallic glass Substances 0.000 claims description 3
- 229910000889 permalloy Inorganic materials 0.000 claims description 3
- 229910000702 sendust Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a high-frequency transformer which comprises a framework, a primary winding, a secondary winding and a main magnetic core. The framework comprises a main magnetic core containing portion, the main magnetic core comprises a winding magnetic column which is positioned inside the main magnetic core containing portion, a primary winding portion, a leaking magnetic core containing portion and a secondary winding portion are arranged on the outer wall of the main magnetic core containing portion sequentially, and the primary winding and the secondary winding are wound on the primary winding portion and the secondary winding portion respectively; the high-frequency transformer further comprises a leaking magnetic core positioned inside the leaking magnetic core containing portion. The leaking magnetic core is arranged to act on magnetic wires of the primary winding, the secondary winding and the main magnetic core to form collateral branch magnetic flux, so that leaking inductance is increased. When a resonant power source is manufactured, an independent inductor does not need to be set additionally, so that manufacturing process and wiring complexity are reduced.
Description
Technical field
The present invention relates to field transformer, the transformator being more particularly to applied in high-frequency circuit.
Background technology
In high frequency switch power application, particularly in resonant transformation topology, need to coordinate using resonant inductance and transformator.
Conventional method for designing has two kinds：
1. using traditional transformator and independent resonant inductance, power supply architecture complexity can so be made, volume increases, and
Make pcb board cabling complexity, electromagnetic interference big.Cause that product efficiency is low, volume big, high cost.
2. simply resonant inductance is integrated in transformator, resonant inductance use is done by the leakage inductance for increasing transformator.
Generally by changing the distance between primary and secondary winding to change the leakage inductance of transformator to reach the requirement of resonant inductance.Need relatively
Big leakage inductance, it is necessary to increase the distance between primary and secondary winding, can cause volume of transformer increasing, magnetic coupling ability, transformation
Device efficiency of transmission is low, and under certain condition is limited, the scope that its leakage inductance can increase is extremely limited.
Content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of height of combination resonant inductance (leakage inductance)
Frequency power transformer, which can solve existing resonant mode power supply needs to set up separate inductor, and design is complicated, bulky problem.Can also solve
Certainly existing limited by increasing the distance increase leakage inductance effect between primary and secondary winding, it is difficult to meet the problem needed for application.
The purpose of the present invention employs the following technical solutions realization：
A kind of high frequency transformer, including skeleton, armature winding, secondary windings and main magnetic core；
The skeleton includes main magnetic core receiving portion, and the main magnetic core includes winding magnetic pole, and the winding magnetic pole is located at described
In main magnetic core receiving portion, the outer wall of the main magnetic core receiving portion be sequentially provided with primary coiling portion, leakage field core receiving portion and secondary around
Portion processed, the armature winding and secondary windings are wound in the primary coiling portion and secondary coiling portion respectively；
The high frequency transformer also includes leakage field core, and the leakage field core is located in the leakage field core receiving portion.
Preferably, the leakage field core is UU, UI or CC type combined magnet core, the inner side of UU, UI or CC type combined magnet core
Offset with the outer wall of the main magnetic core receiving portion.
Preferably, the seam of UU, UI or CC type combined magnet core combination is provided with air gap.
Preferably, UU, UI or CC type combined magnet core includes two side portion, at least in described two side portion
Individual inner side be provided with side projection；The leakage field core receiving portion is provided with through hole, and the through hole runs through the main magnetic core receiving portion
Outer wall, the side is raised to be located in the through hole.
Preferably, UU, UI or CC type combined magnet core includes two side portion, at least in described two side portion
Individual inner side be provided with side projection；The leakage field core receiving portion is provided with groove, and the side is raised to be located in the groove.
Preferably, the main magnetic core receiving portion is circular, rectangle or square receiving portion.
Preferably, the main magnetic core is UU, UI, EE, EI, EC or PQ type magnetic core.
Preferably, described leakage field core is FERRITE CORE, permalloy magnetic core, non-crystaline amorphous metal magnetic core, ultramicro-crystal alloy magnetic
Core, magnetic powder core, sendust core or ferrum silicon magnetic core.
Preferably, the outer wall of the main magnetic core receiving portion is provided with dividing plate, described primary coiling portion, leakage field core receiving portion and
Secondary coiling portion is separated by the dividing plate.
Preferably, the skeleton is that horizontal-type skeleton or vertical-type skeleton, the skeleton also includes pin, the armature winding and
Secondary windings include exit, and the exit is connected with the pin.
Compared to existing technology, the beneficial effects of the present invention is：By arranging leakage field core, in high frequency transformer primary around
Magnetic line of force generation effect in group, secondary windings and main magnetic core, forms collateral branch's magnetic flux, so as to increase leakage inductance.In production resonant mode
During power supply, without independent inductance is additionally arranged, reduce production process and wiring complexity.
Description of the drawings
Fig. 1 is the decomposition texture schematic diagram of the high frequency transformer that the embodiment of the present invention one is provided.
Fig. 2 is the decomposition texture schematic diagram of the high frequency transformer that the embodiment of the present invention two is provided.
Fig. 3 is the leakage field cored structure schematic diagram of the high frequency transformer that the embodiment of the present invention three is provided.
Specific embodiment
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, and in order to allow the above and other objects, features and advantages of the present invention can
Become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Embodiment one：
High frequency transformer as shown in Figure 1, including skeleton 10, armature winding 21, secondary windings 22 and main magnetic core 30.Its
In, skeleton 10 includes main magnetic core receiving portion 11, and main magnetic core 30 includes winding magnetic pole 31, and winding magnetic pole 31 is located at main magnetic core receiving portion
In 11, the outer wall of main magnetic core receiving portion 11 is sequentially provided with primary coiling portion 12, leakage field core receiving portion 13 and secondary coiling portion 14, just
Level winding 21 and secondary windings 22 are wound in primary coiling portion 12 and secondary coiling portion 14 respectively；High frequency transformer also includes leakage
Magnetic core 40, leakage field core 40 is located in leakage field core receiving portion 13.In the present embodiment, main magnetic core 30 is 2 " E " types (comprising likeness in form E
Type) mode docks composition to magnetic core mouth to mouth.In other embodiment, main magnetic core 30 can be UU, UI, EI, EC or PQ type combined magnet core
Deng；The shape of corresponding skeleton 10 can also do corresponding conversion, and typically, main magnetic core receiving portion 11 is circular, rectangle or side
Shape receiving portion..In the present embodiment, leakage field core 40 is that mode docks composition to magnetic core to 2 " U " types (U-shaped comprising being similar to) mouth to mouth,
The outer wall of the inner side of UU, UI or CC type combined magnet core and main magnetic core receiving portion 10 offsets, in another embodiment, can be UI,
CC type combined magnet core etc..Armature winding 21 and secondary windings 22 can be from the materials such as enamel-covered wire, three layer insulation wire, Copper Foil or PCB
Middle selection.
In the present embodiment, collateral branch's magnetic circuit is constituted by arranging leakage field core 40, to armature winding in high frequency transformer 21, secondary
Magnetic line of force generation effect in winding 22 and main magnetic core 30, forms collateral branch's magnetic flux, so as to increase leakage inductance.Leakage field core 40 can be ferrum
Ferrite core, permalloy magnetic core, non-crystaline amorphous metal magnetic core, ultramicro-crystal alloy magnetic core, magnetic powder core, sendust core, ferrum silicon magnetic
Core etc..
Further, the outside of leakage field core 40 is provided with the first fixing band (not shown) for fixed Combination magnetic core and insulation；Just
The second fixing band (not shown) is provided with outside level winding 21 and secondary windings 22, for fixed insulation；The outside of main magnetic core 30 sets
There is the 3rd fixing band, (not shown) is used for fixed Combination magnetic core and insulation.
Further, the outer wall of the main magnetic core receiving portion 11 of skeleton 10 is provided with dividing plate 15, and primary coiling portion 12, leakage field core hold
Receive portion 13 and secondary coiling portion 14 is separated by dividing plate 15.
Further, skeleton 10 is that horizontal or vertical-type skeleton, skeleton 10 also includes pin 16, armature winding 21 and secondary windings
22 with wire as exit (not shown), and exit is connected with pin 16.
Embodiment two：
The decomposition texture schematic diagram of the high frequency transformer that Fig. 2 is provided for the present embodiment, with reference to Fig. 2, the present embodiment and reality
The difference for applying example one is：Leakage field core 40 is provided with air gap 41, and typically, air gap 41 can be in the interface of combined magnet core combination
Place.In the present embodiment, the one arm of U-shaped magnetic core is slightly short, UU type core combination get up seam formed air gap.
In another embodiment, as leakage field core receiving portion 13 is corresponding to the interface side of the combined magnet core of UU or UI type
The length of side makes UU, UI or CC type combined magnet core can not be complete slightly larger than the inner side length of side of UU, UI or CC type combined magnet core interface side
Touch, so as to form air gap 41 in UU, UI or CC type combined magnet core seam.Can be adjusted by the width of adjustment air gap 41
The size of section leakage inductance.Further, in air gap 41, dottle pin 42, or glue-line are provided with, for increasing the fixing effect of combined magnet core
Really.
It is main magnetic core 30 and leakage field that the size of leakage inductance can also pass through the thickness at the leakage field core receiving portion 13 on skeleton 10
The spacing of core 40 is adjusted.Further increase the range of accommodation of leakage inductance amount.Embodiment three
As shown in figure 3, UI type combined magnet core 100 includes two side portion, the i.e. side portion of U-shaped magnetic core 110 and I type magnetic core
120 in itself, and at least one of two side portion are provided with side projection 130, side on the inside of " mouth " word that combined magnet core 100 constitutes
Side raised 130 is cylindric or prism-shaped；Skeleton 200 includes main magnetic core receiving portion 210 and leakage field core receiving portion 220, leakage field core
Receiving portion 220 is provided with least one (preferred, equal with side 130 ground quantity of projection) through hole 230, and through hole 220 is through master
The outer wall of magnetic core receiving portion 210；After combining, side raised 130 is located in through hole 230.In another embodiment, through hole
230 outer walls for not extending through main magnetic core receiving portion 210, but form groove.On the one hand leakage field core (not shown) can be made more to lean on
Nearly main magnetic core (not shown), the collateral branch's magnetic circuit for being easy to leakage field core to constitute derives the magnetic line of force, forms leakage inductance；On the other hand leakage field is avoided
Slip of the core in leakage field core receiving portion 220.
For a person skilled in the art, technical scheme that can be as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the protection model that should all belong to the claims in the present invention
Within enclosing.
Claims (10)
1. a kind of high frequency transformer, including skeleton, armature winding, secondary windings and main magnetic core, it is characterised in that：
The skeleton includes main magnetic core receiving portion, and the main magnetic core includes winding magnetic pole, and the winding magnetic pole is located at the main magnetic
In core receiving portion, the outer wall of the main magnetic core receiving portion is sequentially provided with primary coiling portion, leakage field core receiving portion and secondary coiling portion,
The armature winding and secondary windings are wound in the primary coiling portion and secondary coiling portion respectively；
The high frequency transformer also includes leakage field core, and the leakage field core is located in the leakage field core receiving portion.
2. high frequency transformer as claimed in claim 1, it is characterised in that：The leakage field core is UU, UI or CC type combined magnet core,
The inner side of UU, UI or CC type combined magnet core is offseted with the outer wall of the main magnetic core receiving portion.
3. high frequency transformer as claimed in claim 2, it is characterised in that：What UU, UI or CC type combined magnet core was combined connects
Air gap is provided with mouthful.
4. high frequency transformer as claimed in claim 2, it is characterised in that：UU, UI or CC type combined magnet core includes two
Side portion, at least one of described two side portion are provided with side projection in inner side；The leakage field core receiving portion is provided with logical
Hole, the through hole is through the outer wall of the main magnetic core receiving portion, and the side is raised to be located in the through hole.
5. high frequency transformer as claimed in claim 2, it is characterised in that：UU, UI or CC type combined magnet core includes two
Side portion, at least one of described two side portion are provided with side projection in inner side；The leakage field core receiving portion is provided with recessed
Groove, the side is raised to be located in the groove.
6. high frequency transformer as claimed in claim 1, it is characterised in that：The main magnetic core receiving portion is circular, rectangle or side
Shape receiving portion.
7. high frequency transformer as claimed in claim 1, it is characterised in that：The main magnetic core is UU, UI, EE, EI, EC or PQ type
Magnetic core.
8. the high frequency transformer as any one of claim 1-7, it is characterised in that：The leakage field core is ferrite magnetic
Core, permalloy magnetic core, non-crystaline amorphous metal magnetic core, ultramicro-crystal alloy magnetic core, magnetic powder core, sendust core or ferrum silicon magnetic core.
9. the high frequency transformer as any one of claim 1-8, it is characterised in that：The outer wall of the main magnetic core receiving portion
Dividing plate is provided with, the primary coiling portion, leakage field core receiving portion and secondary coiling portion are separated by the dividing plate.
10. the high frequency transformer as any one of claim 1-8, it is characterised in that：The skeleton be horizontal-type skeleton or
Vertical-type skeleton, the skeleton also includes pin, and the armature winding and secondary windings include exit, the exit with described
Pin connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610995019.3A CN106449053B (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610995019.3A CN106449053B (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106449053A true CN106449053A (en) | 2017-02-22 |
| CN106449053B CN106449053B (en) | 2018-06-26 |
Family
ID=58208387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610995019.3A Active CN106449053B (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106449053B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887143A (en) * | 2017-12-26 | 2018-04-06 | 天津光电润达电子有限公司 | A kind of PQ types high-frequency and high-voltage integrated transformer and processing method |
| CN108417366A (en) * | 2018-01-12 | 2018-08-17 | 海宁联丰东进电子有限公司 | A kind of LLC transformers increasing leakage inductance |
| 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 |
| CN113270259A (en) * | 2021-06-18 | 2021-08-17 | 深圳莱福德科技股份有限公司 | Resonance transformer and switching power supply circuit |
| CN115101299A (en) * | 2022-07-05 | 2022-09-23 | 威海东兴电子有限公司 | An adjustable magnetic integrated resonant power transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200969274Y (en) * | 2006-07-07 | 2007-10-31 | 台达电子工业股份有限公司 | Transformers with wound cells |
| KR20120067061A (en) * | 2010-12-15 | 2012-06-25 | 엘지이노텍 주식회사 | Transformer and method for manufacturing thereof |
| CN202650818U (en) * | 2012-03-22 | 2013-01-02 | 一诺科技股份有限公司 | Transformer structure with increased leakage inductance |
| CN203288405U (en) * | 2013-05-16 | 2013-11-13 | 一诺科技股份有限公司 | Leakage adjustment transformer |
| CN206312725U (en) * | 2016-11-11 | 2017-07-07 | 深圳市莱福德光电有限公司 | High frequency transformer |
-
2016
- 2016-11-11 CN CN201610995019.3A patent/CN106449053B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200969274Y (en) * | 2006-07-07 | 2007-10-31 | 台达电子工业股份有限公司 | Transformers with wound cells |
| KR20120067061A (en) * | 2010-12-15 | 2012-06-25 | 엘지이노텍 주식회사 | Transformer and method for manufacturing thereof |
| CN202650818U (en) * | 2012-03-22 | 2013-01-02 | 一诺科技股份有限公司 | Transformer structure with increased leakage inductance |
| CN203288405U (en) * | 2013-05-16 | 2013-11-13 | 一诺科技股份有限公司 | Leakage adjustment transformer |
| CN206312725U (en) * | 2016-11-11 | 2017-07-07 | 深圳市莱福德光电有限公司 | High frequency transformer |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887143A (en) * | 2017-12-26 | 2018-04-06 | 天津光电润达电子有限公司 | A kind of PQ types high-frequency and high-voltage integrated transformer and processing method |
| CN108417366A (en) * | 2018-01-12 | 2018-08-17 | 海宁联丰东进电子有限公司 | A kind of LLC transformers increasing leakage inductance |
| 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 |
| CN113270259A (en) * | 2021-06-18 | 2021-08-17 | 深圳莱福德科技股份有限公司 | Resonance transformer and switching power supply circuit |
| CN113270259B (en) * | 2021-06-18 | 2025-09-12 | 深圳莱福德科技股份有限公司 | A resonant transformer and switching power supply circuit |
| CN115101299A (en) * | 2022-07-05 | 2022-09-23 | 威海东兴电子有限公司 | An adjustable magnetic integrated resonant power transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106449053B (en) | 2018-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106449053B (en) | High frequency transformer | |
| CN205080987U (en) | Turn over and swash switching mode power supply transformer | |
| CN202282235U (en) | Ethernet coupling transformer for plasma television | |
| CN104240917A (en) | Transformer for switching power supply of visual intercom system, and manufacturing method of transformer | |
| CN206116158U (en) | High -frequency transformer | |
| CN106373734B (en) | High frequency transformer | |
| CN206421891U (en) | A kind of transformer and Switching Power Supply for facilitating Automated winding | |
| CN106373751B (en) | high frequency transformer | |
| CN206532685U (en) | Anti-tampering LED transformers | |
| CN206312725U (en) | High frequency transformer | |
| CN205159057U (en) | Transformer winding structure and portable charger against common mode interference | |
| CN204130325U (en) | A kind of transformer being applicable to Switching Power Supply | |
| CN107887147A (en) | A kind of magnetic integrated transformer and processing method | |
| CN103646756A (en) | High-power-density switching power supply transformer and processing technology thereof | |
| CN203366953U (en) | Ultra-thin inductance framework | |
| CN208690074U (en) | Integrated transformer | |
| CN106024333B (en) | A kind of multi-groove type rectifier transformer | |
| CN201397728Y (en) | Network transformer | |
| CN203491061U (en) | Communication transformer | |
| CN107749343A (en) | A kind of high frequency switch power isolating transformer for carrying current acquisition function | |
| CN108962562A (en) | A kind of exoskeletal LLC transformer of HC type and its manufacturing method | |
| CN210956411U (en) | Fixing structure of inductance coil winding | |
| CN203931760U (en) | A kind of sandwich winding transformer that removes Y electric capacity | |
| CN203423848U (en) | Novel PCB coil | |
| CN209729682U (en) | A controllable leakage inductance LLC resonant power integrated transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 518000 Guangdong province Shenzhen city Baoan District street Xixiang Development Zone guwu Indus Taihua Industrial Park building 14A building 4-5 Applicant after: Polytron Technologies Inc, Shenzhen Address before: 518000 Guangdong province Shenzhen city Baoan District street Xixiang Development Zone guwu Indus Taihua Industrial Park building 14A building 4-5 Applicant before: Shenzhen Ledfriend Optoelectronics Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |