CN108511163A - A kind of high frequency transformer and its resin-cast method - Google Patents
A kind of high frequency transformer and its resin-cast method Download PDFInfo
- Publication number
- CN108511163A CN108511163A CN201810252043.7A CN201810252043A CN108511163A CN 108511163 A CN108511163 A CN 108511163A CN 201810252043 A CN201810252043 A CN 201810252043A CN 108511163 A CN108511163 A CN 108511163A
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- winding
- magnetic core
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- coil
- high frequency
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- 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
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- 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
-
- 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
- H01F27/2876—Cooling
-
- 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
- H01F27/323—Insulation between winding turns, between winding 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
- H01F27/32—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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/122—Insulating between turns or between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention discloses a kind of high frequency transformers, including magnetic core, the external rings of magnetic core are around being arranged with several windings, insulating layer is provided between winding, it is differed at a distance from magnetic core between two adjacent windings, and each winding cross section is not exactly the same, each winding is arranged from center to the gradually smaller mode in both sides according to winding cross section and is set on magnetic core.The present invention also provides a kind of resin-cast method of above-mentioned transformer, resin gradually infiltrates winding and each channel out of both ends inflow transformer winding, along the channel with gradient that winding is formed.The beneficial effects of the invention are as follows because coil multistage designs, reduce voltage between layers, it avoids coil inside and is possible to the hot-spot phenomenon occurred, improve the heat distribution of coil inside, the structure of the phenomenon that reducing coil hot-spot, the application make resin be easier to enter in each coil segment, occur to reduce coil inside gap, partial discharge quantity is substantially reduced, the quality of coil is improved.
Description
Technical field
The present invention relates to a kind of transformer technology field, specially a kind of high frequency transformer and its resin-cast method.
Background technology
With the fast development of Chinese national economy, the getting worse that problem of environmental pollution also becomes, and seriously affected
The quality of life and health of broad masses of the people.Dust is the major reason for causing environmental pollution, electric power, papermaking,
Mining, the industry such as chemical industry is the important source of dust emission, and country is made that dust emission standard stringent rule at present
Fixed (50mg/m3), and require to enforce, therefore dedusting technology is particularly significant in industrial circle.Electrostatic precipitator technology is compared
In dedusting technologies such as traditional mechanical dedusting, washing type dedusting, filtering type dedusting and dust collections by sound wave, there is the model of processing dust
It encloses greatly, high dust collection efficiency, the pressure loss is small, high reliability, therefore has obtained widely answering in industrial dedusting field
With.At the same time high-frequency electrostatic dedusting power source also has begun to be applied in electrostatic precipitator technology, compared to power frequency electric
The efficiency of dust collection of source high frequency electric source more high energy consumption smaller, not will produce serious harmonic wave causes power grid electricity consumption uneven and relatively strong
Adaptation severe operating mode ability.
High frequency transformer is the important component of high-frequency electrostatic dedusting power source, safe and stable operation for power supply just
It often works most important.Different from common high frequency transformer, the high frequency transformer for static dust-removing power have frequency it is high,
The feature that power is big, voltage class is high, therefore higher want is proposed for high frequency transformer fever and insulating Design aspect
It asks.
Invention content
The purpose of the present invention is that provides a kind of high frequency transformer and its resin-cast side to solve the above-mentioned problems
Method.
The present invention is achieved through the following technical solutions above-mentioned purpose, a kind of high frequency transformer, including magnetic core, the magnetic core
External rings around several windings are arranged with, be provided with insulating layer between the winding, between two adjacent windings with magnetic core away from
From differing, and each winding cross section is not exactly the same, and each winding is arranged according to winding cross section from center to the gradually smaller mode in both sides
Row are set on magnetic core.
Preferably, the insulating layer includes insulating board and oil duct, and the oil duct is folded between insulating board.
Preferably, the magnetic core is EI core structures.
Preferably, the magnetic core is to handle silicon steel sheet through continuous carbon dioxide laser.
Preferably, the silicon steel sheet use continuous laser beam, with it is dotted or it is linear along with roll to vertical direction every 5
The spacing irradiation of millimeter is primary, and it is 200W to 700W that laser, which changes power, and sweep speed is 10mm per minute to per minute
600mm, laser scanning direction perpendicular to silicon steel sheet roll to.
Preferably, it is cast with resin between the winding and magnetic core, in winding surrounding, winding.
Preferably, the winding uses sectionalized winding coiling, if having dried layer, uses water chestnut lattice point gummed paper exhausted between layers
Edge.
The present invention also provides a kind of high frequency transformer resin-cast method, the coil that coiling finishes is taken out in high vacuum state
Go out moisture content, the casting resin after coil reaches insulating requirements, resin around the smaller winding of two end sections to intermediate cross-section compared with
It flows, is filled between winding and magnetic core, in winding surrounding, winding around big winding, tight object is formed in coil surrounding
The insulating layer of matter forms the coil of a glass steel body through hot setting.
Preferably, the resin is epoxy resin.
Preferably, plug hole is offered at the winding described in both ends.
The beneficial effects of the invention are as follows：
(1) because coil multistage designs, voltage between layers is reduced, electric property is good, and is conducive to dissipating between winding
Heat avoids coil inside and is possible to the hot-spot phenomenon occurred, and in addition to being distributed to end, partial heat is also communicated to heat
Neighbouring line segment assumes responsibility for the heat from adjacent winding, is heated very uneven, it is likely that hot-spot phenomenon is caused, and originally
The winding construction of application, is not the relationship of corresponding superposition between winding, and heat has part to reach line without adjacent winding
Ring outer wall, this reduces the heat burdens of winding, improve the heat distribution of coil inside, reduce coil hot-spot
Phenomenon；
(2) transformer uses insulation resin, the structure of the application to be also beneficial to the infiltration of resin, and coil is drum type brake knot
The channel of structure, end is obviously more much older than conventional coil, such improvement, and resin is made to be easier to enter in each coil segment, from
And reduce the appearance of coil inside gap, partial discharge quantity is substantially reduced, the quality of coil is improved；
(3) under the effect of the laser, the refinement of silicon steel magnetic domain, the appearance of subdomain structure, new magnetic domain and former magnetic domain is vertical
It is bound to cause the variation in fine magnetic field, studies the variation in this fine magnetic field, reduce the loss of transformer to a certain extent；
(4) it is insulated to transformer using insulating layer, insulating paper and resin, insulation effect is good, can greatly improve resistance to
Compressive Strength, the major insulation for promoting transformer are horizontal.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention；
Fig. 2 is the insulating layer schematic diagram of the present invention.
In figure：1, magnetic core, 2, winding, 3, insulating board, 4, oil duct.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 shown in-Fig. 2, a kind of high frequency transformer, including magnetic core 1, the external rings of magnetic core 1 are several around being arranged with
Winding 2 is provided with insulating layer between winding 2, is differed at a distance from magnetic core 1 between two adjacent windings 2, and 2 section of each winding
Not exactly the same, each winding 2 is arranged from center to the gradually smaller mode in both sides according to winding cross section and is set on magnetic core 1, respectively
Winding 2 is coaxially set in magnetism 1, and the section of all windings 2 is throughout central symmetry, so, the heat on winding 2
Amount distribute and will not stop that a part of heat can be distributed from both ends by adjacent winding 2, while be in staggered distribution around
Group forms the channel with gradient, facilitates the cast of insulating resin.
Winding 2 uses sectionalized winding coiling, and segmented winding refers to that sectional framework is used to divide winding 2 for several sections, each
Section is wound on a skeleton, i.e., original coil is divided into several pieces.The maximum voltage difference of coil interlayer only has input voltage
Part, can substantially reduce winding interlayer voltage difference, it is horizontal to improve winding insulation.
Magnetic core is EI core structures, and magnetic core is using closing EI type square structures, its leakage inductance is small, because of closed magnetic core 1
Magnetic flux be substantially all and concentrate in magnetic core 1, the interference that magnetic field of tube outside interference is generated from which direction intrusion all can be mutual
It offsets, because the interference magnetic field of outside is all divided into both direction in magnetic core 1 and passes through.
Transformer generate loss the main reason for have core vibration caused by silicon steel sheet magnetostriction, silicon steel sheet seam crossing and
The vibration etc. of iron core caused by leakage field between lamination.The magnetic core of the application is to handle silicon steel through continuous carbon dioxide laser
Piece.When processing, silicon steel sheet use continuous laser beam, with it is dotted or it is linear along with roll between every 5 millimeters vertical of direction
Primary away from irradiation, it is 200W to 700W that laser, which changes power, and sweep speed is 10mm per minute to 600mm per minute, and laser is swept
Retouch direction perpendicular to silicon steel sheet roll to.
After the laser treatment of low-power, magnetic domain significantly refines, domain structure when increasing laser power density
Change bigger, under suitable laser power density, the spacing of domain structure reduces, and sub- domain structure, this change occurs
The loss of transformer is reduced to a certain extent.
The transformer of the application has a variety of insulation systems, including the insulating layer between winding, casting resin and winding layers
Insulation gummed paper between layer.
The volume of transformer can be reduced to improve the power density of transformer by improving the frequency of transformer, however for
For high frequency high voltage transformer, if carrying out Design of Transformer major insulation only with insulating oil in transformer insulated design, by
In its voltage class higher therefore need to increase insulation distance and reduce electric field strength, which increases the volumes of transformer, and
And the rising of cost is caused, economy declines.According to small size effect theory, the compressive resistance of transformer oil is with oil volume
Increase and reduce.In order to solve this problem, the major insulation of transformer uses insulating board-oil structure.Transformer oil is used
Insulating board 3 divides for several pieces, the voltage being partitioned between several 4 shared windings of oil duct.Compared to simple transformation
Device oil-insulation, this structure can greatly improve compressive resistance, and the major insulation for promoting transformer is horizontal.The insulating layer packet of the application
Insulating board 3 and oil duct 4 are included, oil duct 4 is folded between insulating board 3.
In addition, being cast with resin between winding 2 and magnetic core 1, in 2 surrounding of winding, winding 2.Winding uses sectionalized winding
Coiling uses water chestnut lattice glue paper insulation between layers if having dried layer.A variety of insulation systems are worked in coordination, and are solved substantially
The leakage problem of transformer.
When the resin-cast of high frequency transformer, waits for that the coil that coiling finishes extracts moisture content out in high vacuum state, wait for that coil reaches
Casting resin after to insulating requirements flows around resin winding larger to intermediate cross-section around the smaller winding of two end sections
It is dynamic, it is filled between winding 2 and magnetic core 1, in 2 surrounding of winding, winding 2, the insulation of tight substance is formed in 2 surrounding of winding
Layer forms the winding of a glass steel body through hot setting.Used resin is epoxy resin.It is opened at the winding described in both ends
Equipped with plug hole, resin is facilitated to be poured into a mould from both ends.
Cast transformer is to the reaction very little of humidity, and all material is nonhygroscopic, therefore transformer is lain idle for a long time
After can direct-electrifying without processing is dried, operation and maintenance are simple.Epoxy resin resists chemical attack and industrial pollution
Ability is also very strong, and epoxy resin itself is fire retardant, self-extinguishment, therefore can be applied to rugged environment.The winding of casting epoxy resin, does not have
There is the gentle bubble in gap, therefore partial discharge quantity substantially reduces, is generally less than 10pc, eliminates corona discharge, winding can be made
Remain higher insulation performance, pour into a mould the stability of the tolerance short circuit of winding far beyond traditional dry-type transformer and
Oil-immersed transformer.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (10)
1. a kind of high frequency transformer, it is characterised in that：Including magnetic core, the external rings of the magnetic core are around being arranged with several windings, institute
It states and is provided with insulating layer between winding, differed at a distance from magnetic core between two adjacent windings, and the incomplete phase of each winding cross section
Together, each winding is arranged from center to the gradually smaller mode in both sides according to winding cross section and is set on magnetic core.
2. a kind of high frequency transformer according to claim 1, it is characterised in that：The insulating layer includes insulating board and oil
Road, the oil duct are folded between insulating board.
3. a kind of high frequency transformer according to claim 1, it is characterised in that：The magnetic core is EI core structures.
4. a kind of high frequency transformer according to claim 1, it is characterised in that：The magnetic core is through continuous carbon dioxide
Laser treatment silicon steel sheet.
5. a kind of high frequency transformer according to claim 4, it is characterised in that：The silicon steel sheet uses continuous laser beam,
With dotted or linear along being irradiated to every 5 millimeters of the spacing in vertical direction primary with rolling, laser variation power arrives for 200W
700W, sweep speed be 10mm per minute to 600mm per minute, laser scanning direction perpendicular to silicon steel sheet roll to.
6. a kind of high frequency transformer according to claim 1, it is characterised in that：Between the winding and magnetic core, winding four
It is cast with resin in week, winding.
7. a kind of high frequency transformer according to claim 1, it is characterised in that：The winding uses sectionalized winding coiling,
If with dried layer, water chestnut lattice glue paper insulation is used between layers.
8. a kind of resin-cast method of claim 1-7 any one of them high frequency transformers, it is characterised in that：Coiling finishes
Coil extract moisture content out in high vacuum state, the casting resin after coil reaches insulating requirements, resin is smaller from two end sections
To flowing around the larger winding in intermediate cross-section around winding, it is filled between winding and magnetic core, in winding surrounding, winding,
Coil surrounding forms the insulating layer of tight substance, and the coil of a glass steel body is formed through hot setting.
9. resin-cast method according to claim 8, it is characterised in that：The resin is epoxy resin.
10. resin-cast method according to claim 8, it is characterised in that：Cast is offered at the winding described in both ends
Hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252043.7A CN108511163A (en) | 2018-03-26 | 2018-03-26 | A kind of high frequency transformer and its resin-cast method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252043.7A CN108511163A (en) | 2018-03-26 | 2018-03-26 | A kind of high frequency transformer and its resin-cast method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108511163A true CN108511163A (en) | 2018-09-07 |
Family
ID=63378467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810252043.7A Pending CN108511163A (en) | 2018-03-26 | 2018-03-26 | A kind of high frequency transformer and its resin-cast method |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103080A (en) * | 2020-08-31 | 2020-12-18 | 大连北方互感器集团有限公司 | Method for fixing interlayer insulating paper of primary winding of voltage transformer |
| CN113593870A (en) * | 2021-06-09 | 2021-11-02 | 夏周阳 | Magnetic suspension type packaging method for core of dry type transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244597A (en) * | 1998-08-07 | 2000-02-16 | 东北大学 | Laser treatment method of orienting the surface of silicon steel |
| CN1246956A (en) * | 1997-02-03 | 2000-03-08 | 瑞典通用电器勃朗勃威力公司 | Winding in transformer or inductor |
| US6191675B1 (en) * | 1998-04-22 | 2001-02-20 | Hitachi, Ltd. | High voltage transformer and ignition transformer using the same |
| CN1352700A (en) * | 1999-05-26 | 2002-06-05 | 阿奇亚斯佩丝阿里特尔尼公司 | Process for improvement of magnetic characteristics in grain oriented electrical silicon steel sheet by laser treatment |
| CN201204118Y (en) * | 2008-06-18 | 2009-03-04 | 广东中电华强变压器有限公司 | Resin insulated dry power transformer |
| CN103227043A (en) * | 2013-05-21 | 2013-07-31 | 浙江腾腾电气有限公司 | Carbon brush contact-type self-coupling-type AC (alternating current) voltage regulator based on segmented variable cross-section windings |
-
2018
- 2018-03-26 CN CN201810252043.7A patent/CN108511163A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246956A (en) * | 1997-02-03 | 2000-03-08 | 瑞典通用电器勃朗勃威力公司 | Winding in transformer or inductor |
| US6191675B1 (en) * | 1998-04-22 | 2001-02-20 | Hitachi, Ltd. | High voltage transformer and ignition transformer using the same |
| CN1244597A (en) * | 1998-08-07 | 2000-02-16 | 东北大学 | Laser treatment method of orienting the surface of silicon steel |
| CN1352700A (en) * | 1999-05-26 | 2002-06-05 | 阿奇亚斯佩丝阿里特尔尼公司 | Process for improvement of magnetic characteristics in grain oriented electrical silicon steel sheet by laser treatment |
| CN201204118Y (en) * | 2008-06-18 | 2009-03-04 | 广东中电华强变压器有限公司 | Resin insulated dry power transformer |
| CN103227043A (en) * | 2013-05-21 | 2013-07-31 | 浙江腾腾电气有限公司 | Carbon brush contact-type self-coupling-type AC (alternating current) voltage regulator based on segmented variable cross-section windings |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103080A (en) * | 2020-08-31 | 2020-12-18 | 大连北方互感器集团有限公司 | Method for fixing interlayer insulating paper of primary winding of voltage transformer |
| CN113593870A (en) * | 2021-06-09 | 2021-11-02 | 夏周阳 | Magnetic suspension type packaging method for core of dry type transformer |
| CN113593870B (en) * | 2021-06-09 | 2023-05-16 | 湖南驰骋电气科技有限公司 | Magnetic levitation type packaging method for dry type transformer core |
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Application publication date: 20180907 |
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