CN106252048A - A kind of magnet shielding structure being applied to supertension autotransformer folder - Google Patents
A kind of magnet shielding structure being applied to supertension autotransformer folder Download PDFInfo
- Publication number
- CN106252048A CN106252048A CN201610795729.1A CN201610795729A CN106252048A CN 106252048 A CN106252048 A CN 106252048A CN 201610795729 A CN201610795729 A CN 201610795729A CN 106252048 A CN106252048 A CN 106252048A
- Authority
- CN
- China
- Prior art keywords
- folder
- magnetic shield
- bending
- supertension
- autotransformer
- 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
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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
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/02—Auto-transformers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0018—Casings with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A kind of magnet shielding structure being applied to supertension autotransformer folder, relates to a kind of magnet shielding structure.Leakage flux between its inside and outside winding of supertension autotransformer is high, uses usual way to be not enough to effectively reduce loss, the hidden danger of elimination hot-spot.The present invention includes bending magnetic shield, the first insulating pad, connects bending magnetic shield and the first insulating pad to the securing member of folder, described bending magnetic shield cross section in " L ", bending part arc transition；Described bending magnetic shield is located at the outer end of folder.The technical program installs " L " type bending bending magnetic shield additional by the outer end of the folder bigger in leakage magnetic flux density, decreases leakage magnetic flux and enters non magnetic folder, it is possible to is effectively reduced the added losses that leakage magnetic flux produces.
Description
Technical field
The present invention relates to a kind of magnet shielding structure, particularly relate to a kind of magnetic cup being applied to supertension autotransformer folder
Shield structure.
Background technology
Magnetic shield is made up of the stalloy multilamellar stack that magnetic property is good.It is generally divided into oil according to its shielding position difference
Case magnetic shield, folder magnetic shield etc..Magnetic shield is generally used for high voltage, high-power transformer.Owing to this type of stray transformer flux is close
Degree accounts for the large percentage of main flux density, and leakage magnetic flux through the folder of steel matter time can produce eddy-current loss and magnetic hystersis loss,
Further result in folder heating.Generally 220KV and following product use low magnetic conduction or non magnetic steel plate to make relevant folder, limb
Plate etc., but the leakage flux between its inside and outside winding of supertension autotransformer is up to the 30% ~ 40% of main flux density, and it brings
Loss account for the 30% ~ 50% of basic copper loss, use usual way be not enough to effectively to reduce loss, elimination hot-spot hidden
Suffer from.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition is to carry out prior art improving and improving,
A kind of magnet shielding structure being applied to supertension autotransformer folder is provided, with reduce leakage magnetic flux produce added losses as mesh
's.To this end, the present invention takes techniques below scheme.
A kind of magnet shielding structure being applied to supertension autotransformer folder, including bending magnetic shield, the first insulation
Backing plate, connect bending magnetic shield and the first insulating pad to the securing member of folder, described bending magnetic shield cross section in
" L ", bending part arc transition；Described bending magnetic shield is located at the outer end of folder.By bigger in leakage magnetic flux density
The outer end of folder installs " L " type bending bending magnetic shield additional, decreases leakage magnetic flux and enters non magnetic folder, it is possible to effectively drops
The added losses that low drain magnetic flux produces.
As improving further and supplementing technique scheme, present invention additionally comprises following additional technical feature.
Also including straight magnetic shield, described straight magnetic shield is stacked with bending magnetic shield, described straight magnetic
It is overall that shielding part, bending magnetic shield, the first insulating pad are connected as one by securing member and folder.By increasing and bending magnetic
Shielding part while stacked straight magnetic shield, it is possible to preferably decrease leakage magnetic flux and enter non magnetic folder.
The thickness of described bending magnetic shield is 8-12mm；It is highly 220-240mm.This is sized to cover folder
The position that outer end leakage magnetic flux density is bigger.
Described bending magnetic shield is provided with the first connecting hole, the second connecting hole, described the first connecting hole, second connects
Hole is respectively arranged on two orthogonal flat boards of " L " type bending magnetic shield, described the first connecting hole and/or second
Connecting hole is mounting hole.By connecting hole being located on two pieces of orthogonal flat boards of " L " type, it is simple to connect fixing, kidney-shaped
The slight regulation of fastener locations is easy in the setting in hole.
Described securing member includes that the first securing member, the second securing member, the first described connecting hole wear the first securing member,
The second described connecting hole wears the second securing member, and the first securing member is arranged in the end sides of folder, and the second securing member wears
End end face in folder.By the first securing member, the second securing member is mutually perpendicular is anchored on folder, it is possible to stable
Magnet shielding structure is firmly fixed.
Described straight magnetic shield is located between bending magnetic shield and the first insulating pad.By straight magnetic shield is set
Inside bending magnetic shield, the corner of magnet shielding structure is without acute angle, safer.
The first described securing member includes insulating pad in bending magnetic shield, straight magnetic shield and first to be fastened on folder
Bolt and the first packing ring, the first external insulation backing plate being located between bending magnetic shield and the first packing ring on part, it is embedded at
Insulating washer in one connecting hole, the insulation pillar being located between insulating washer and bolt, the pipe range etc. of described insulation pillar
Distance between folder and the first packing ring.By the insulating structure of the first securing member is designed, it is possible to play the most absolutely
Edge effect.
The second described securing member include insulation blanket stud, the second packing ring, nut and be located at bending magnetic shield and yoke screen it
Between the second external insulation backing plate, insulation blanket stud ecto-entad sequentially pass through yoke screen, the second external insulation backing plate, bending magnetic shield,
It is attached at insulating pad in the second of folder end end face and is fixed on the end of folder.By the second fastening using insulation
Part, it is possible to reduce the electric leakage leakage field phenomenon between folder and bending magnetic shield.
First external insulation backing plate, the second external insulation backing plate are epoxy novolac cardboard；In first in insulating pad and second absolutely
Edge backing plate, insulating washer are laminated paper plate；Described insulation pillar is sulfate pulp profiled member.Epoxy novolac cardboard,
Laminated paper plate, sulfate pulp profiled member cost are relatively low, are easily worked manufacture, and good insulating.
Described bending magnetic shield is stacked by after the identical stalloy bending of multi-disc, and straight magnetic shield is identical by multi-disc
Stalloy stacking forms, and fits tightly between adjacent two panels stalloy.Fitted tightly by stalloy and be fabricated to magnetic shield, lead
Magnetic property is more preferable, it is possible to preferably reduces leakage magnetic flux and enters non magnetic folder.
Beneficial effect: installed additional the magnet shielding structure part made by stalloy by the position bigger in leakage magnetic flux density, lead
Magnetic property is good, decreases leakage magnetic flux and enters non magnetic folder, the corresponding added losses reducing leakage magnetic flux generation, improves transformator
Photoelectric transformation efficiency, reduces the accident rate that hot-spot causes, improves the economic benefit of transformator.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
Fig. 2 is bending magnetic shield structural representation of the present invention.
Fig. 3 is that bending magnetic shield of the present invention launches plane graph.
Fig. 4 is the present invention straight magnetic shield structural representation.
In figure: 1-folder；2-bending magnetic shield；The straight magnetic shield of 3-；Insulating pad in 4-first；Insulation in 5-second
Backing plate；6-the first external insulation backing plate；7-the second external insulation backing plate；8-insulation blanket stud；9-nut；10-the second packing ring；11-insulate
Packing ring；12-insulate pillar；13-bolt；14-the first packing ring；15-yoke screen；201-the first connecting hole；202-the second connecting hole.
Detailed description of the invention
Below in conjunction with Figure of description, technical scheme is described in further detail.
As Figure 1-4, insulating pad 4, connection bending magnetic shield 2 in the present invention includes bending magnetic shield 2, first
With first in the securing member of insulating pad 4 to folder 1, bending magnetic shield 2 cross section in " L ", bending part arc transition；Folding
Curved magnetic shield 2 is located at the outer end of folder 1." L " type bending is installed additional by the outer end of the folder 1 bigger in leakage magnetic flux density
Bending magnetic shield 2, decreases leakage magnetic flux and enters non magnetic folder 1, it is possible to be effectively reduced the added losses that leakage magnetic flux produces.
Enter non magnetic folder 1 to preferably reduce leakage magnetic flux, also include straight magnetic shield 3, straight magnetic shield 3 and folding
Curved magnetic shield 2 while stacked, in straight magnetic shield 3, bending magnetic shield 2, first, insulating pad 4 is by securing member and folder
It is overall that part 1 is connected as one.By increase with bending magnetic shield 2 while stacked straight magnetic shield 3, it is possible to preferably reduce
Leakage magnetic flux enters non magnetic folder 1.
In order to cover the position that leakage magnetic flux density is bigger, the thickness of bending magnetic shield 2 is 8-12mm；It is highly
220-240mm.This bigger position of outer end leakage magnetic flux density being sized to cover folder 1.
For the ease of the position adjustments of securing member, bending magnetic shield 2 is provided with first connecting hole the 201, second connecting hole
202, first connecting hole the 201, second connecting hole 202 is respectively arranged on two orthogonal flat boards of " L " type bending magnetic shield 2
On, the first connecting hole 201 and/or the second connecting hole 202 are mounting hole.Mutually hang down by connecting hole being located at two pieces of " L " type
On straight flat board, it is simple to connect fixing, the slight regulation of fastener locations is easy in the setting of mounting hole.
In order to magnet shielding structure is firmly fixed, securing member includes the first securing member, the second securing member, the first connecting hole
201 wear the first securing member, and the second connecting hole 202 wears the second securing member, and the first securing member is arranged in the end side of folder 1
Face, the second securing member is arranged in the end end face of folder 1.By the first securing member, the second mutually perpendicular fastening of securing member
On folder 1, it is possible to stable is firmly fixed magnet shielding structure.
In order to promote safety, straight magnetic shield 3 is located in bending magnetic shield 2 and first between insulating pad 4.Pass through
Straight magnetic shield 3 is located at inside bending magnetic shield 2, and the corner of magnet shielding structure is without acute angle, safer.
In order to play preferable insulation effect, the first securing member includes bending magnetic shield 2, straight magnetic shield 3 and
Bolt 13 and the first packing ring 14 that in one, insulating pad 4 is fastened on folder 1, it is located at bending magnetic shield 2 and the first packing ring 14
Between the first external insulation backing plate 6, the insulating washer 11 being embedded in the first connecting hole 201, be located at insulating washer 11 and bolt
Insulation pillar 12 between 13, the pipe range of insulation pillar 12 is equal to the distance between folder 1 and the first packing ring 14.By to first
The insulating structure design of securing member, it is possible to play good insulation effect.
In order to reduce electric leakage leakage field phenomenon, the second securing member includes insulation blanket stud the 8, second packing ring 10, nut 9 and is located at folding
The second external insulation backing plate 7 between curved magnetic shield 2 and yoke screen 15, insulation blanket stud 8 ecto-entad sequentially passes through yoke screen 15, second
External insulation backing plate 7, bending magnetic shield 2, be attached at folder end end face second in insulating pad 5 be fixed on folder 1
End.By the second securing member using insulation, it is possible to reduce the electric leakage leakage field between folder 1 and bending magnetic shield 2 existing
As
In order to realize insulation effect and be easy to manufacture, first external insulation backing plate the 6, second external insulation backing plate 7 is epoxy novolac cardboard；
In first, in insulating pad 4 and second, insulating pad 5, insulating washer 11 are laminated paper plate；Insulation pillar 12 is sulfate
Paper pulp molding part.Epoxy novolac cardboard, laminated paper plate, sulfate pulp profiled member cost are relatively low, are easily worked manufacture, and
Good insulating.
Entering non magnetic folder 1 to preferably reduce leakage magnetic flux, bending magnetic shield 2 is rolled over by 5 identical stalloys
Stacking after curved, straight magnetic shield 3 is formed by 5 identical stalloy stackings, fits tightly between adjacent two panels stalloy.Pass through
Stalloy fits tightly and is fabricated to magnetic shield, and magnetic property is more preferable, it is possible to preferably reduces leakage magnetic flux and enters non magnetic folder
1。
When installing magnet shielding structure, first the end lateral surface at folder 1 is sticked insulating pad 4 in first, at folder 1 end
The end face side in portion is sticked insulating pad 5 in second, insulating pad 4 lateral surface in straight magnetic shield 3 is attached at first, then
Two medial surface of bending magnetic shield 2 are attached at insulating pad 5 and the lateral surface of straight magnetic shield 3 in second respectively, and
Bending magnetic shield 2 lateral surface at second connecting hole 202 is sticked the second external insulation backing plate 7 and yoke screen 15 successively, then
Insert insulation blanket stud 8 at two connecting holes 202 and tighten, then being inserted in the second packing ring 10, and tightening with nut 9；At the first connecting hole
First embed insulating washer 11 at 201 to bottom, then insulation pillar 12 is set in the centre bore of insulating washer 11, outside first
Insulating pad 6 is attached at this hole, and the bolt 13 with the first packing ring 14 of screwing on.By said process at other of folder 1 end
Position continues to install magnet shielding structure.Can ratio without folder 1 magnet shielding structure reduce about 20% added losses, improve transformation
The economic benefit of device.
In this example, folder 1 includes that upper clamping piece 1 and lower clamping piece 1, the first connecting hole 201 are the waist of 2 lateral symmetry settings
Shape hole；The circular port that the second connecting hole 202 is 4 lateral symmetry settings on upper clamping piece 1, the second connecting hole on lower clamping piece 1
202 is the circular port of 2 lateral symmetry settings；Straight magnetic shield 3 is provided with the circular port corresponding with 2 mounting hole positions.
A kind of magnet shielding structure being applied to supertension autotransformer folder shown in figure 1 above-4 is the present invention
Specific embodiment, has embodied substantive distinguishing features of the present invention and progress, can be according to actual use needs, opening in the present invention
Under showing, it is carried out the equivalent modifications of the aspect such as shape, structure, all at the row of protection domain of this programme.
Claims (10)
1. the magnet shielding structure being applied to supertension autotransformer folder, it is characterised in that: include bending magnetic shield
(2), insulating pad (4) in first, connect insulating pad (4) in bending magnetic shield (2) and first to the fastening of folder (1)
Part, described bending magnetic shield (2) cross section in " L ", bending part arc transition；Described bending magnetic shield (2) is located at
The outer end of folder (1).
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 1, its feature exists
In: also including straight magnetic shield (3), described straight magnetic shield (3) is stacked with bending magnetic shield (2), described
Straight magnetic shield (3), bending magnetic shield (2), in first insulating pad (4) to be connected as one by securing member and folder (1) whole
Body.
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 1, its feature exists
In: the thickness of described bending magnetic shield (2) is 8-12mm；It is highly 220-240mm.
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 3, its feature exists
In: described bending magnetic shield (2) is provided with the first connecting hole (201), the second connecting hole (202), the first described connecting hole
(201), the second connecting hole (202) be respectively arranged on two orthogonal flat boards of " L " type bending magnetic shield (2), described
The first connecting hole (201) and/or the second connecting hole (202) be mounting hole.
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 1, its feature exists
In: described securing member includes that the first securing member, the second securing member, described the first connecting hole (201) wear the first securing member,
Described the second connecting hole (202) wears the second securing member, and the first securing member is arranged in the end sides of folder (1), and second is tight
Firmware is arranged in the end end face of folder (1).
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 1, its feature exists
It is located in bending magnetic shield (2) and first between insulating pad (4) in: described straight magnetic shield (3).
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 5, its feature exists
In: in the first described securing member includes bending magnetic shield (2), straight magnetic shield (3) and first, insulating pad (4) fastens
Outside bolt (13) on folder (1) and packing ring (14), first be located between bending magnetic shield (2) and the first packing ring (14)
Insulating pad (6), the insulating washer (11) being embedded in the first connecting hole (201), it is located at insulating washer (11) and bolt (13)
Between insulation pillar (12), the pipe range of described insulation pillar (12) equal between folder (1) and the first packing ring (14) away from
From.
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 5, its feature exists
In: the second described securing member includes insulation blanket stud (8), the second packing ring (10), nut (9) and is located at bending magnetic shield (2)
And the second external insulation backing plate (7) between yoke screen (15), insulation blanket stud (8) ecto-entad sequentially passes through yoke screen (15), outside second
Insulating pad (7), bending magnetic shield (2) and be attached at folder end end face second in insulating pad (5) be fixed on folder
The end of part (1).
9., according to a kind of magnet shielding structure being applied to supertension autotransformer folder described in claim 7 or 8, it is special
Levy and be: the first external insulation backing plate (6), the second external insulation backing plate (7) are epoxy novolac cardboard；In first insulating pad (4) and
In second, insulating pad (5), insulating washer (11) are laminated paper plate；Described insulation pillar (12) is that sulfate pulp becomes
Type part.
A kind of magnet shielding structure being applied to supertension autotransformer folder the most according to claim 2, its feature
It is: described bending magnetic shield (2) is stacked by after the identical stalloy bending of multi-disc, and straight magnetic shield (3) is by multi-disc phase
Same stalloy stacking forms, and fits tightly between adjacent two panels stalloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795729.1A CN106252048A (en) | 2016-08-31 | 2016-08-31 | A kind of magnet shielding structure being applied to supertension autotransformer folder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795729.1A CN106252048A (en) | 2016-08-31 | 2016-08-31 | A kind of magnet shielding structure being applied to supertension autotransformer folder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106252048A true CN106252048A (en) | 2016-12-21 |
Family
ID=58080848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610795729.1A Pending CN106252048A (en) | 2016-08-31 | 2016-08-31 | A kind of magnet shielding structure being applied to supertension autotransformer folder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106252048A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010695A (en) * | 2017-11-28 | 2018-05-08 | 山东泰开变压器有限公司 | Single-phase autotransformer based on resistance to shorting |
| CN109599256A (en) * | 2019-01-18 | 2019-04-09 | 吴江变压器有限公司 | A kind of low magnetic resistance folder magnetic screen |
| CN110070977A (en) * | 2019-06-04 | 2019-07-30 | 保定天威保变电气股份有限公司 | High-temperature-resistant insulation structure and method for iron core of high-capacity converter transformer |
| CN111029114A (en) * | 2019-12-30 | 2020-04-17 | 山东泰开变压器有限公司 | Magnetic shielding device of large-capacity transformer |
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| CN202940112U (en) * | 2012-01-12 | 2013-05-15 | 洛阳恒光特种变压器有限公司 | Strip-shaped magnetic shielding structure |
| CN202948826U (en) * | 2012-12-24 | 2013-05-22 | 保定天威保变电气股份有限公司 | Transformer tank wall shielding structure |
| CN203760294U (en) * | 2014-01-22 | 2014-08-06 | 卧龙电气集团股份有限公司 | Transformer magnetic shielding mounting structure |
| CN203910427U (en) * | 2014-05-21 | 2014-10-29 | 山东达驰电气有限公司 | Transformer body supporting structure with support plate |
| CN204066968U (en) * | 2014-08-27 | 2014-12-31 | 山东华驰变压器股份有限公司 | Single-phase three post 500KV superhigh pressure strong current transformer clamping piece magnetic shielding structures |
| CN206282708U (en) * | 2016-08-31 | 2017-06-27 | 卧龙电气集团股份有限公司 | A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder |
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| JPS61170012A (en) * | 1985-01-23 | 1986-07-31 | Toshiba Corp | Stationary induction apparatus |
| CN2862286Y (en) * | 2005-11-01 | 2007-01-24 | 特变电工沈阳变压器集团有限公司技术中心 | New-pattern screening device for iron core clamp piece |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010695A (en) * | 2017-11-28 | 2018-05-08 | 山东泰开变压器有限公司 | Single-phase autotransformer based on resistance to shorting |
| CN109599256A (en) * | 2019-01-18 | 2019-04-09 | 吴江变压器有限公司 | A kind of low magnetic resistance folder magnetic screen |
| CN110070977A (en) * | 2019-06-04 | 2019-07-30 | 保定天威保变电气股份有限公司 | High-temperature-resistant insulation structure and method for iron core of high-capacity converter transformer |
| CN111029114A (en) * | 2019-12-30 | 2020-04-17 | 山东泰开变压器有限公司 | Magnetic shielding device of large-capacity transformer |
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| PB01 | Publication | ||
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Application publication date: 20161221 |