CN110911136A - Transformer framework, transformer and switching power supply - Google Patents
Transformer framework, transformer and switching power supply Download PDFInfo
- Publication number
- CN110911136A CN110911136A CN201911324335.8A CN201911324335A CN110911136A CN 110911136 A CN110911136 A CN 110911136A CN 201911324335 A CN201911324335 A CN 201911324335A CN 110911136 A CN110911136 A CN 110911136A
- Authority
- CN
- China
- Prior art keywords
- primary
- transformer
- coil
- bobbin
- framework
- 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
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- KKQWHYGECTYFIA-UHFFFAOYSA-N 2,5-dichlorobiphenyl Chemical group ClC1=CC=C(Cl)C(C=2C=CC=CC=2)=C1 KKQWHYGECTYFIA-UHFFFAOYSA-N 0.000 description 3
- IYZWUWBAFUBNCH-UHFFFAOYSA-N 2,6-dichlorobiphenyl Chemical group ClC1=CC=CC(Cl)=C1C1=CC=CC=C1 IYZWUWBAFUBNCH-UHFFFAOYSA-N 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a transformer framework, a transformer and a switching power supply, wherein the transformer framework comprises a primary framework for winding a primary coil and a secondary framework for winding a secondary coil, the secondary framework is coaxially sleeved outside the primary framework, the primary framework is provided with a magnetic loop through hole for mounting a magnetic core along the axial direction of the primary framework, the transformer framework further comprises a mounting support for mounting the secondary framework, a retaining wall for separating a high-pressure area and a low-pressure area is arranged on the mounting support, and the end part of the secondary coil penetrates through the retaining wall and extends to the low-pressure area. The technical scheme of the invention improves the structures of the existing transformer and the switching power supply, effectively isolates high voltage and low voltage, and greatly improves the use safety.
Description
Technical Field
The invention relates to the technical field of electronic products, in particular to a transformer framework, a transformer and a switching power supply.
Background
A typical switching power supply includes a transformer, a PCB, and a housing. Due to the manufacturing process problem of the traditional transformer, the current switching power supply cannot realize high-reliability isolation of high voltage and low voltage. The transformer is a core component of the switching power supply and is also a core component for high-low voltage conversion, so how to ensure reliable isolation of high-low voltage becomes the primary problem of safe power utilization of the switching power supply. The current isolation method is to use an insulating tape (thickness is about 0.01mm), that is, the primary coil and the secondary coil are sequentially wound on the same framework, and the insulating tape is wound between the primary coil and the secondary coil for isolation. Due to the poor consistency of the insulating tapes and the aging in use, the high-voltage and low-voltage areas cannot be isolated reliably, and meanwhile, the high-voltage area and the low-voltage area are isolated by space (generally, 5mm is isolated between the high-voltage area and the low-voltage area), air can conduct electricity or form an arc and draw an arc under certain conditions, so that the high-voltage and the low-voltage cannot be isolated reliably. Therefore, there is a great safety risk that, in case of high and low voltage series, the equipment is damaged if light, and a fire is caused if heavy.
Disclosure of Invention
The invention mainly aims to provide a transformer framework, a transformer and a switching power supply, aiming at improving the structures of the existing transformer and the existing switching power supply, effectively isolating high voltage and low voltage and greatly improving the use safety.
In order to achieve the above object, the present invention provides a transformer bobbin, which includes a primary bobbin for winding a primary coil, a secondary bobbin for winding a secondary coil, and a mounting bracket for mounting the secondary bobbin, wherein the secondary bobbin is coaxially sleeved outside the primary bobbin, and the primary bobbin is provided with a magnetic circuit through hole along an axial direction thereof for mounting a magnetic core, the mounting bracket is provided with a retaining wall for separating a high-pressure region and a low-pressure region, and an end of the secondary coil extends to the low-pressure region through the retaining wall.
Preferably, the mounting bracket is provided with a mounting groove for mounting the secondary framework, the secondary framework is embedded in the mounting groove, and the secondary coil is arranged between the secondary framework and the mounting groove.
Preferably, the secondary skeleton and the mounting bracket are arranged into an integrated structure formed in a secondary molding mode, and the secondary coil is arranged between the secondary skeleton and the mounting bracket.
Preferably, the primary framework and the secondary framework are respectively provided with an annular baffle plate along the two axial ends.
Preferably, the primary framework, the secondary framework and the mounting bracket are all of high-temperature-resistant insulating material integrally formed structures.
The invention further provides a transformer which comprises the transformer framework, wherein the primary framework is wound with a primary coil, the primary coil is wrapped with a primary isolating piece, the secondary framework is wound with a secondary coil, the primary framework is provided with a PIN foot used for being connected with a PCB in a high-voltage area, the primary coil is connected with the PIN foot, the secondary coil is used for being connected with the PCB in a low-voltage area, and the transformer also comprises a first magnetic core and a second magnetic core which are arranged at two ends of a magnetic circuit through hole of the primary framework.
Preferably, an auxiliary coil is wound on the primary separator, the auxiliary coil is connected with the PIN, and the auxiliary separator wraps the outer side of the auxiliary coil.
Preferably, the primary separator and the auxiliary separator are each provided as an insulating sheet.
Preferably, the second magnetic core, the secondary skeleton and the mounting frame are arranged to be of an integrally formed secondary structure.
The invention further provides a switching power supply which comprises the transformer, a high-voltage area PCB connected with an external high-voltage end and a low-voltage area PCB connected with an external low-voltage end, wherein the PIN foot is electrically connected with the high-voltage area PCB, the end part of the secondary coil is electrically connected with the low-voltage area PCB, and the high-voltage area PCB and the low-voltage area PCB are respectively arranged on two sides of the retaining wall for isolation.
Compared with the prior art, the invention has the beneficial effects that: the structure of traditional transformer and switching power supply has been improved, installs primary coil and secondary coil respectively on solitary skeleton, divide into two different subassemblies, carries out primary coil and secondary coil's isolation through the skeleton, has cancelled traditional adhesive tape isolation mode, effectively prevents the danger that voltage breakdown adhesive tape brought. Meanwhile, the retaining wall is arranged to effectively separate the high-pressure area from the low-pressure area, the traditional separation only by a certain installation distance is eliminated, and the danger caused by the voltage foundation of the high-pressure area and the low-pressure area is avoided. The whole structure is simple in design, low in cost and convenient to manufacture.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of the framework structure of the present invention;
FIG. 2 is a schematic diagram of a transformer according to the present invention;
fig. 3 is a schematic diagram of the switching power supply of the present invention:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The transformer framework provided by the embodiment, referring to fig. 1, comprises a primary framework 1 for winding a primary coil 4 and a secondary framework 2 for winding a secondary coil 5, wherein the secondary framework 2 is coaxially sleeved on the outer side of the primary framework 1, the primary framework 1 is provided with a magnetic circuit through hole 11 for installing a magnetic core along the axial direction of the primary framework, the transformer framework further comprises an installation support 3 for installing the secondary framework 2, the installation support 3 is provided with a retaining wall 31 for separating a high-voltage area and a low-voltage area, and the end part of the secondary coil 5 penetrates through the retaining wall 31 and extends to the low-voltage area.
It should be noted that, in the present embodiment, by providing the primary bobbin 1 and the secondary bobbin 2 separately, the primary coil 4 and the secondary coil 5 are provided as two separate components and are effectively isolated. Specifically, the primary coil 4 is wound around the primary bobbin 1, and the primary separator 41 is included outside the primary coil 4, thereby forming a single primary assembly. Then, the secondary coil 5 is wound on the secondary bobbin 2, and the secondary bobbin 2 wound with the secondary coil 5 is mounted on the mounting bracket 3 to form a separate secondary assembly. Then, the secondary assembly is coaxially sleeved on the primary assembly (namely, the secondary framework 2 wound with the secondary coil 5 is coaxially sleeved on the primary framework 1 wound with the primary coil 4), the primary coil 4 and the secondary coil 5 are effectively isolated from each other through the primary isolating piece 41 and the secondary framework 2, the secondary framework 2 can be effectively prevented from being broken down by voltage, and the use safety is greatly improved. Meanwhile, after the secondary assembly and the primary assembly are spliced, the mounting bracket 3 is provided with a avoiding hole 33 corresponding to the magnetic loop through hole 11, and the avoiding hole 33 is used for mounting the magnetic core, so that the magnetic core can be conveniently and respectively mounted at two ends of the magnetic loop through hole 11.
Further, the mounting bracket 3 is provided with a mounting groove 32 for mounting the secondary frame 2, the secondary frame 2 is embedded in the mounting groove 32, and the secondary coil 5 is arranged between the secondary frame 2 and the mounting groove 32. In this embodiment, secondary skeleton 2 can movable mounting in the mounting groove 32 that installing support 3 seted up, and is fixed through the joint between the two to make things convenient for the dismantlement of its installation and later stage, structural design is simple.
Further, the secondary framework 2 and the mounting bracket 3 are arranged to be of an integrated structure formed in a secondary molding mode, and the secondary coil 5 is arranged between the secondary framework 2 and the mounting bracket 3. In this embodiment, the secondary frame 2 wound with the secondary coil 5 and the mounting bracket 3 can be integrated into a whole through a secondary molding process, so that the overall consistency and the structural stability of the secondary assembly are ensured, and the production efficiency can be improved.
Furthermore, the primary framework 1 and the secondary framework 2 are respectively provided with an annular baffle plate 102 along two axial ends thereof, and the annular baffle plates 102 are arranged at the two ends, so that the primary coil 4 and the secondary coil 5 can be limited between the annular baffle plates 102, the coils can be prevented from falling off, and meanwhile, voltage isolation can be further performed.
Further, the primary framework 1, the secondary framework 2 and the mounting bracket 3 are all set to be of a high-temperature-resistant insulating material integrally-formed structure. Preferably, the insulating material can be set to be bakelite material, which has high mechanical strength, good insulating property, heat resistance and corrosion resistance, and can improve the high-low voltage isolation effect of the framework, prevent the framework from being broken down by voltage and prolong the service life of the framework.
This embodiment still provides a transformer, refer to fig. 2, including above-mentioned transformer skeleton, the winding has primary coil 4 on the primary skeleton 1, primary coil 4 outside parcel has primary separator 41, the winding has secondary coil 5 on the secondary skeleton 2, be equipped with the PIN foot 12 that is used for being connected with high-pressure area PCB board 9 on the primary skeleton 1, primary coil 4 with PIN foot 12 is connected, secondary coil 5 is used for being connected with low-pressure area PCB board 10, still including install in the first magnetic core 7 and the second magnetic core 8 at 1 magnetic circuit through-hole 11 both ends of primary skeleton.
It should be noted that, in the present embodiment, by providing the primary bobbin 1 and the secondary bobbin 2 separately, the primary coil 4 and the secondary coil 5 are provided as two separate components and are effectively isolated. Specifically, the primary coil 4 is wound around the primary bobbin 1, and the primary separator 41 is included outside the primary coil 4, thereby forming a single primary assembly. Then, the secondary coil 5 is wound on the secondary bobbin 2, and the secondary bobbin 2 wound with the secondary coil 5 is mounted on the mounting bracket 3 to form a separate secondary assembly. Then, the secondary assembly is coaxially sleeved on the primary assembly (namely, the secondary framework 2 wound with the secondary coil 5 is coaxially sleeved on the primary framework 1 wound with the primary coil 4), the primary coil 4 and the secondary coil 5 are effectively isolated from each other through the primary isolating piece 41 and the secondary framework 2, the secondary framework 2 can be effectively prevented from being broken down by voltage, and the use safety is greatly improved. Meanwhile, after the secondary assembly and the primary assembly are spliced, the mounting bracket 3 is provided with a position avoiding hole 33 corresponding to the magnetic circuit through hole 11, and the position avoiding hole 33 is used for mounting the magnetic core, so that the magnetic core can be conveniently and respectively mounted at two ends of the magnetic circuit through hole 11.
Further, an auxiliary coil 6 is wound on the primary separator 41, the auxiliary coil 6 is connected with the PIN 12, and an auxiliary separator 61 is wrapped outside the auxiliary coil 6. By adding the auxiliary coil 6 in the primary assembly, isolating the primary coil 4 and the auxiliary coil 6 with a primary isolation space, and wrapping the auxiliary coil 6 with the auxiliary isolator 61, the electric safety can be further ensured.
Further, the primary separator 41 and the auxiliary separator 61 are each provided as an insulating sheet commonly used in the art.
Further, the second magnetic core 8, the secondary framework 2 and the mounting frame are arranged to be of an integrated secondary molding structure. Pass through the post of post forming as an organic whole with second magnetic core 8 and secondary assembly, install in unison on primary assembly again, not only can guarantee this secondary assembly's whole uniformity and structural stability, still easy to assemble can improve production efficiency.
The present embodiment further provides a switching power supply, referring to fig. 3, including the transformer, further including a high voltage PCB 9 connected to an external high voltage terminal, and a low voltage PCB 10 connected to an external low voltage terminal, wherein the PIN 12 is electrically connected to the high voltage PCB 9, the end of the secondary winding 5 is electrically connected to the low voltage PCB 10, and the high voltage PCB 9 and the low voltage PCB 10 are respectively disposed on two sides of the retaining wall 31 for isolation.
It should be noted that, in the present embodiment, by providing the primary bobbin 1 and the secondary bobbin 2 separately, the primary coil 4 and the secondary coil 5 are provided as two separate components and are effectively isolated. Specifically, the primary coil 4 is wound around the primary bobbin 1, and the primary separator 41 is included outside the primary coil 4, thereby forming a single primary assembly. Then, the secondary coil 5 is wound on the secondary bobbin 2, and the secondary bobbin 2 wound with the secondary coil 5 is mounted on the mounting bracket 3 to form a separate secondary assembly. Then, the secondary assembly is coaxially sleeved on the primary assembly (namely, the secondary framework 2 wound with the secondary coil 5 is coaxially sleeved on the primary framework 1 wound with the primary coil 4), the primary coil 4 and the secondary coil 5 are effectively isolated from each other through the primary isolating piece 41 and the secondary framework 2, the secondary framework 2 can be effectively prevented from being broken down by voltage, and the use safety is greatly improved. Meanwhile, after the secondary assembly and the primary assembly are spliced, the mounting bracket 3 is provided with a position avoiding hole 33 corresponding to the magnetic circuit through hole 11, and the position avoiding hole 33 is used for mounting the magnetic core, so that the magnetic core can be conveniently and respectively mounted at two ends of the magnetic circuit through hole 11. Further, an auxiliary coil 6 is wound on the primary separator 41, the auxiliary coil 6 is connected with the PIN 12, and an auxiliary separator 61 is wrapped outside the auxiliary coil 6. By adding the auxiliary coil 6 in the primary assembly, isolating the primary coil 4 and the auxiliary coil 6 with a primary isolation space, and wrapping the auxiliary coil 6 with the auxiliary isolator 61, the electric safety can be further ensured.
Further, in the embodiment, the retaining wall 31 is arranged on the mounting bracket 3 to completely isolate the high-voltage area from the low-voltage area in the switching power supply, so that the traditional design that only 5mm of isolation is carried out between the high-voltage area and the low-voltage area is eliminated, and no isolation structure is arranged, voltage cross-talk or arc formation between the high-voltage area and the low-voltage area can be effectively prevented, and thus danger is caused.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a transformer skeleton, its characterized in that, is including the primary skeleton that is used for twining primary coil, the secondary skeleton that is used for twining secondary coil, the coaxial cover of secondary skeleton is located the primary skeleton outside, just the magnetic circuit through-hole that is used for installing the magnetic core is offered along its axial to primary skeleton, still includes one and is used for the installation the installing support of secondary skeleton, be equipped with a barricade that is used for separating high nip and low-pressure area on the installing support, secondary coil's tip passes the barricade extends to the low-pressure area.
2. The transformer bobbin of claim 1, wherein the mounting bracket defines a mounting slot for mounting the secondary bobbin, the secondary bobbin is inserted into the mounting slot, and the secondary coil is disposed between the secondary bobbin and the mounting slot.
3. The transformer bobbin of claim 1, wherein the secondary bobbin and the mounting bracket are provided as an over-molded, unitary structure, and the secondary coil is disposed between the secondary bobbin and the mounting bracket.
4. The transformer bobbin of any one of claims 1 to 3, wherein the primary bobbin and the secondary bobbin are respectively provided with an annular baffle at both ends in the axial direction thereof.
5. The transformer bobbin of claim 4, wherein the primary bobbin, the secondary bobbin, and the mounting bracket are all provided as a unitary structure of high temperature resistant insulating material.
6. A transformer, characterized by, including the transformer skeleton of any one of claims 1 ~ 5, primary has twined primary on the skeleton, primary wraps up primary separator outside the coil, secondary has twined secondary on the skeleton, be equipped with the PIN foot that is used for being connected with high-pressure area PCB board on the skeleton of elementary, primary with the PIN foot is connected, secondary is used for being connected with low-pressure area PCB board, still including install in first magnetic core and the second magnetic core at elementary skeleton magnetic circuit through-hole both ends.
7. The transformer of claim 6, wherein an auxiliary coil is wound on the primary isolator, the auxiliary coil is connected with the PIN PIN, and the auxiliary coil is wrapped with an auxiliary isolator.
8. The transformer according to any of claims 6 or 7, wherein the primary and secondary spacers are each provided as an insulating sheet.
9. The transformer of claim 8, wherein the second magnetic core is provided as an overmolded unitary structure with the secondary bobbin and the mounting bracket.
10. A switching power supply, comprising the transformer according to any one of claims 6 to 9, further comprising a high voltage area PCB connected to an external high voltage terminal, and a low voltage area PCB connected to an external low voltage terminal, wherein the PIN is electrically connected to the high voltage area PCB, the end of the secondary winding is electrically connected to the low voltage area PCB, and the high voltage area PCB and the low voltage area PCB are respectively disposed on two sides of the dam for isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911324335.8A CN110911136A (en) | 2019-12-20 | 2019-12-20 | Transformer framework, transformer and switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911324335.8A CN110911136A (en) | 2019-12-20 | 2019-12-20 | Transformer framework, transformer and switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110911136A true CN110911136A (en) | 2020-03-24 |
Family
ID=69826948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911324335.8A Pending CN110911136A (en) | 2019-12-20 | 2019-12-20 | Transformer framework, transformer and switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110911136A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952038A (en) * | 2020-08-21 | 2020-11-17 | 上海交通大学 | Cake-type solid insulation high-frequency transformer based on 3D printing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854781Y (en) * | 2005-09-20 | 2007-01-03 | 力信兴业股份有限公司 | Iron-core separation transformer |
| CN201025595Y (en) * | 2007-01-09 | 2008-02-20 | 台龙电子股份有限公司 | Coiling frame separation structure of power transformer |
| CN201532846U (en) * | 2009-05-19 | 2010-07-21 | 北京新创四方电子有限公司 | High voltage-resistance silicon controlled trigger transformer |
| CN104157420A (en) * | 2014-08-08 | 2014-11-19 | 江苏晨朗电子集团有限公司 | ED type combined resonance transformer |
| JP5854572B1 (en) * | 2015-02-12 | 2016-02-09 | 株式会社電研精機研究所 | Transformer bobbins and transformers |
| CN207353067U (en) * | 2017-09-27 | 2018-05-11 | 东翔电子（东莞）有限公司 | A kind of transformer reel |
| CN211062572U (en) * | 2019-12-20 | 2020-07-21 | 陈学皇 | Transformer framework, transformer and switching power supply |
-
2019
- 2019-12-20 CN CN201911324335.8A patent/CN110911136A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854781Y (en) * | 2005-09-20 | 2007-01-03 | 力信兴业股份有限公司 | Iron-core separation transformer |
| CN201025595Y (en) * | 2007-01-09 | 2008-02-20 | 台龙电子股份有限公司 | Coiling frame separation structure of power transformer |
| CN201532846U (en) * | 2009-05-19 | 2010-07-21 | 北京新创四方电子有限公司 | High voltage-resistance silicon controlled trigger transformer |
| CN104157420A (en) * | 2014-08-08 | 2014-11-19 | 江苏晨朗电子集团有限公司 | ED type combined resonance transformer |
| JP5854572B1 (en) * | 2015-02-12 | 2016-02-09 | 株式会社電研精機研究所 | Transformer bobbins and transformers |
| CN207353067U (en) * | 2017-09-27 | 2018-05-11 | 东翔电子（东莞）有限公司 | A kind of transformer reel |
| CN211062572U (en) * | 2019-12-20 | 2020-07-21 | 陈学皇 | Transformer framework, transformer and switching power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952038A (en) * | 2020-08-21 | 2020-11-17 | 上海交通大学 | Cake-type solid insulation high-frequency transformer based on 3D printing |
| CN111952038B (en) * | 2020-08-21 | 2022-04-26 | 上海交通大学 | Cake-type solid insulation high-frequency transformer based on 3D printing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211062572U (en) | Transformer framework, transformer and switching power supply | |
| CN201282017Y (en) | Capacitor voltage transformer capable of regulating error on site | |
| CN210245282U (en) | Transformer | |
| CN110911136A (en) | Transformer framework, transformer and switching power supply | |
| CN205384921U (en) | Inductance coil structure | |
| CN110993283B (en) | Voltage-regulating outgoing line structure and configuration method thereof | |
| CN203277057U (en) | Electronic transformer framework | |
| CN202940106U (en) | Dry-type transformer with open coiled iron cores | |
| US20210287849A1 (en) | Transformer and Electric Power Converter | |
| CN102005293A (en) | Current transformer | |
| CN115472392A (en) | High-current annular vertical winding inductor and winding method thereof | |
| CN201904204U (en) | Novel current transformer | |
| CN209859779U (en) | Coil assembly of current transformer | |
| CN208208515U (en) | A kind of transformer framework and transformer | |
| CN103106999A (en) | Dry-type transformer | |
| CN202816628U (en) | High-frequency insulation power transformer | |
| CN203799859U (en) | Outdoor bus type current transformer | |
| CN205177588U (en) | Tandem formula voltage transformer | |
| CN220155361U (en) | High-voltage framework structure of ignition coil | |
| CN204720297U (en) | A kind of transformer framework structure | |
| CN110828127A (en) | High-frequency micro-electric protection mutual inductor | |
| CN214753304U (en) | Line cake structure transformer | |
| CN219457323U (en) | Transformer and bottom box power supply | |
| CN217035374U (en) | High-frequency high-voltage high-power output inductor | |
| CN220984287U (en) | Get electric 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 |