CN101640106A - Wound iron-core transformer and iron core thereof - Google Patents
Wound iron-core transformer and iron core thereof Download PDFInfo
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- CN101640106A CN101640106A CN200910151077A CN200910151077A CN101640106A CN 101640106 A CN101640106 A CN 101640106A CN 200910151077 A CN200910151077 A CN 200910151077A CN 200910151077 A CN200910151077 A CN 200910151077A CN 101640106 A CN101640106 A CN 101640106A
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Abstract
The invention discloses an iron core of a wound iron-core transformer. The iron core is prepared by rolling iron core materials and provided with a flexural splicing seam along a thickness extending direction; in the iron core connected with the flexural splicing seam, the area at the joint is increased remarkably so as to reduce the reluctance of the iron core; the open-type wound iron-core transformer formed by the iron core can effectively reduce the reluctance between the splicing surfaces of the iron core and obviously reduce the iron loss of the wound iron-core transformer, thereby reducing the no-load loss and improving the efficiency of the wound iron-core transformer. The invention also discloses a wound iron-core transformer comprising the iron core with higher working efficiency.
Description
Technical field
The present invention relates to industry manufacture field, particularly relate to a kind of iron core that is used for Wound iron-core transformer.The invention still further relates to a kind of Wound iron-core transformer that comprises above-mentioned iron core.
Background technology
Transformer is widely used in electric power, metallurgy, chemical industry, along with the fast development of China's economic construction, market increases day by day for the demand of transformer, not only requires its stable performance, security of operation, and require its efficient height, low-loss to become an important design goal of transformer.
The main means of exploitation low loss transformer are to adopt new material, use new construction and new technology.As everyone knows, the exploitation of new material is difficult in the short time and obtains development effectiveness preferably; And the structure of transformer also is difficult in and makes the big variation of its structure generation in a short time through optimizing for many years; So, look on the bright side of things and send the lower transformer of loss, need on manufacturing process, look for solution.
The iron core of Wound iron-core transformer is to roll continuously with core materials such as silicon steel sheets to form, and it can guarantee that the magnetic flux circulating direction is consistent with the grain orientation of silicon strip, and the premium properties of material is brought into play fully, thereby allows the iron loss of transformer reduce.Therefore, Wound iron-core transformer obtains numerous insiders' approval in transformer industry.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of typical volume three-phase three-limb transformer unshakable in one's determination in the prior art.
To roll up technology popularization unshakable in one's determination to three-phase transformer, and can be made into the three-phase three-limb transformer core, it is made up of two identical inside casings 1 and a housing 2, and each core limb all is made up of two different frame posts.
After the Wound iron-core transformer energising, magnetic flux flows in each iron core, because iron core itself also is a conductor, will induced potential on perpendicular to the plane of the magnetic line of force, this electromotive force forms the closed-loop path and produces electric current on the section of iron core, the loss of transformer is increased, and the magnetic resistance in the iron core is big more, the loss of transformer is big more.But coiling trouble when closed volume iron core is made, complex process can't be keeped in repair.Therefore, Wound iron-core transformer can not get wideling popularize in China's transformer industry.
Please refer to Fig. 2 and Fig. 3, Fig. 2 is a structural representation unshakable in one's determination in the prior art; Fig. 3 looks schematic diagram for the left side of iron core shown in Figure 2.
In order to simplify the manufacture craft of Wound iron-core transformer, improve volume maintainability unshakable in one's determination, developed country such as Japan and Korea S., U.S. adopts the open type Wound iron-core transformer that forms unshakable in one's determination, its manufacturing process is: after iron core 3 rolls and finishes, cut straight line shape slit 4 along its axis direction earlier, then that coiling is good lead bag (not shown) is enclosed within on unshakable in one's determination 3 from this seam, finishes the assembling of device body.Thereby effectively simplify winding operation, solved directly coiling and the defective that can't keep in repair on the volume iron core.
With respect to closed Wound iron-core transformer, the manufacturing process of open type transformer is simple relatively, but because iron core is to form by the mode that linear splices, magnetic resistance unshakable in one's determination is increased, thereby cause that volume iron loss unshakable in one's determination increases, the efficient of Wound iron-core transformer is reduced.
How reducing the magnetic resistance between Mosaic face unshakable in one's determination, reduce the loss of Wound iron-core transformer, thereby improve the efficient of Wound iron-core transformer, is the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of iron core that is used for Wound iron-core transformer, magnetic resistance is less during this iron core work, and the Wound iron-core transformer that utilizes this iron core to make can effectively reduce the iron loss of Wound iron-core transformer, thereby improves the operating efficiency of Wound iron-core transformer.The present invention also provides a kind of Wound iron-core transformer that comprises above-mentioned iron core.
For solving the problems of the technologies described above, the invention provides a kind of iron core, be used for Wound iron-core transformer, this iron core utilizes core material to roll and forms, and should have splicing seams along the direction that its thickness extends by iron core, and described splicing seams is crooked shape seam.
Preferably, described crooked shape seam is saw-tooth slot.
Preferably, in the described saw-tooth slot, adjacent toothed edge forms 60 degree angles.
Preferably, the material of described iron core is a silicon steel sheet.
Preferably, the material of described iron core is a non-crystaline amorphous metal.
Preferably, describedly unshakable in one's determination adopt at least two core materials end to end and roll and form, adjacent described core material is by the splicing of crooked shape seam.
The present invention also provides a kind of Wound iron-core transformer, comprises above-mentioned any described iron core.
Iron core provided by the invention, its splicing place adopts crooked shape slit to link together, the splicing area of splicing place is significantly increased, because the magnetic line of force number through Mosaic face is certain, its contact area increase certainly will cause reducing through the density of line of magnetic force of Mosaic face, thereby effectively reduce the magnetic resistance between Mosaic face unshakable in one's determination, and then iron loss unshakable in one's determination, no-load loss unshakable in one's determination reduced.
A kind of preferred embodiment in, the material of making described iron core is a non-crystaline amorphous metal.Because amorphous alloy material has superior magnetic conductivity, be easier to few energy consumption magnetization or demagnetization.Therefore, the no-load loss of the iron core of making of amorphous alloy material is littler, utilizes the operating efficiency of the Wound iron-core transformer that this iron core makes higher.
Description of drawings
Fig. 1 is the structural representation of a kind of typical volume three-phase three-limb transformer unshakable in one's determination in the prior art;
Fig. 2 is a structural representation unshakable in one's determination in the prior art;
Fig. 3 looks schematic diagram for the left side of iron core shown in Figure 2;
Fig. 4 is the structural representation of a specific embodiment unshakable in one's determination provided by the present invention;
Fig. 5 looks schematic diagram for the left side of iron core shown in Figure 4;
Fig. 6 is the structural representation of a specific embodiment of Mosaic face provided by the present invention;
Fig. 7 is the structural representation of another specific embodiment of Mosaic face provided by the present invention;
Fig. 8 is the structural representation of a specific embodiment of three-phase three-limb transformer provided by the present invention.
Embodiment
Core of the present invention provides a kind of iron core, and magnetic resistance is less during this iron core work, and the Wound iron-core transformer that utilizes this iron core to make can effectively reduce the iron loss of Wound iron-core transformer, thereby improves the operating efficiency of Wound iron-core transformer.The present invention also provides a kind of Wound iron-core transformer that comprises above-mentioned iron core.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
For ease of explanation, earlier relational term is explained as follows:
Transformer: form by the two or more coils (winding) that are enclosed within the closed core.Wherein, iron core is the required main magnetic circuit of electromagnetic induction in the transformer, and higher by silicon content usually, the silicon steel sheet closed assembly that the surface scribbles insulating varnish forms, and separates with insulating varnish between sheet; Winding is the circuit part of transformer, and it is to become with mariages bag insulation lenticular wire or enamel-cover circle wire-wound.
The iron loss of transformer: after the elementary winding energising of transformer, the magnetic flux that coil produced flows in iron core, because iron core itself also is a conductor, will induced potential on perpendicular to the plane of the magnetic line of force, this electromotive force forms the closed-loop path and produces electric current on the section of iron core, be called " eddy current " so seem a vortex.This " eddy current " increases the loss of transformer, and the temperature rise of the iron core heating transformer of transformer is increased.The iron loss major part of transformer is formed by the loss that " eddy current " produces.
The no-load loss of transformer: mainly form by " iron loss " and " copper loss ".
In engineering calculation, the iron loss of transformer is the product of iron core weight, iron-loss per unit weight and technological coefficient, iron-loss per unit weight is to make a character of material unshakable in one's determination itself, the size of technological coefficient is relevant with the magnetic resistance of transformer, magnetic resistance is big more, iron-loss per unit weight is big more, and with the increase of magnetic resistance, it is big that the increment rate of iron-loss per unit weight also obviously becomes.
Wound iron-core transformer provided by the invention, the Mosaic face of its iron core 5 are crooked shape face, with respect to the straight line splicing, adopt crooked shape Mosaic face that its splicing area is increased considerably.Because the size of iron-loss per unit weight is relevant with magnetic resistance, magnetic resistance is big more, and iron-loss per unit weight is big more; Otherwise magnetic resistance is more little, and iron-loss per unit weight is more little.When the increase of splicing area, the magnetic resistance on the Mosaic face reduces, thereby the iron-loss per unit weight of iron core 5 is reduced, and the no-load loss of Wound iron-core transformer reduces, and the operating efficiency of transformer increases.
Need to prove that crooked shape splicing seams as herein described obviously is to be different from the linear splicing seams, need only its line that is positioned at two ends, slit unshakable in one's determination, the same side end points and this splicing seams not point-blank, all should belong to crooked shape splicing seams as herein described.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of a specific embodiment unshakable in one's determination provided by the present invention; Fig. 5 looks schematic diagram for a left side unshakable in one's determination shown in Fig. 4.
In a specific embodiment, splicing seams 6 mentioned above is a zigzag, and the angle of its adjacent toothed edge is α.The zigzag splicing seams can effectively increase substantially the splicing area between two Mosaic faces, thereby effectively reduces magnetic resistance, and then has reduced the iron loss of transformer.Simultaneously, the zigzag splicing seams is comparatively common in life, also is easier to finish when being processed to form this seam, so adopt zigzag splicing seams can effectively reduce technology difficulty, improves working (machining) efficiency, cuts down finished cost.
Please refer to Fig. 6, Fig. 6 is the structural representation of a specific embodiment of Mosaic face provided by the present invention.
Specifically, in unshakable in one's determination 5 the splicing seams 6, the size of the angle α of two adjacent toothed edges can be any one angle in 0 ° of-180 ° of angle, but, by how much general knowledge as can be known, when the angle of two adjacent toothed edges more little, the splicing area that splicing seams is 6 is big more, makes the magnetic resistance of iron core 5 more little; But angle is more little, and the making of splicing seams 6 is complicated more, and processing cost is high more.Draw through experiment, when the angle of angle α was 60 °, unshakable in one's determination 5 splicing area was bigger, and the manufacture craft of splicing seams 6 is also simple relatively, and production cost is also relatively low, helps making the higher iron core of cost performance.
Please refer to Fig. 7, Fig. 7 is the structural representation of another specific embodiment of Mosaic face provided by the present invention.
Please refer to Fig. 8, Fig. 8 is the structural representation of a specific embodiment of three-phase three-limb transformer provided by the present invention.
In a specific embodiment, the splicing seams 6 of the crooked shape of employing can further increase the area of Mosaic face in the three-phase three-limb transformer, reduces the magnetic resistance through this Mosaic face, and the iron loss of transformer is further reduced, and the efficient of transformer further improves.
In the existing Wound iron-core transformer market, adopt hot rolling or the cold-reduced silicon sheet that silicon content is higher, the surface scribbles insulating varnish to roll iron core more.Its market occupancy volume is bigger, has good popularization market.
Along with the continuous appearance of various new materials, the transformer of being made up of new material also comes into the market.In a kind of specific embodiment of the present invention, it is unshakable in one's determination to adopt amorphous alloy material to make.Because non-crystaline amorphous metal is better than the magnetic property of cold-reduced silicon sheet, its degaussing is very easily finished with the process that is magnetized, and reduces greatly than the silicon steel material core loss, reaches energy-efficient effect.
Because amorphous alloy material has superior magnetic conductivity, be easier to few energy consumption magnetization or demagnetization.Therefore the no-load loss of utilizing the transformer that non-crystaline amorphous metal makes is well below traditional transformer.In addition, the non-crystaline amorphous metal Wound iron-core transformer because loss is low, heating less, temperature rise is low, can make its runnability more stable.
It is to be noted; above-mentioned Wound iron-core transformer also can be to be made by other material except with silicon steel sheet or the non-crystaline amorphous metal, as long as its Mosaic face unshakable in one's determination adopts crooked shape connecting method splicing; all without prejudice to basic thought of the present invention, all should be within protection scope of the present invention.
Can do further to improve to Wound iron-core transformer mentioned above.
Unshakable in one's determination in the process of rolling, in order to reduce magnetic resistance as much as possible, the iron loss of transformer is reduced, when producing iron core, wish to adopt a complete core material (such as silicon steel sheet or non-crystaline amorphous metal) to roll formation, but easy like this core material waste, the increase production cost of causing.
In order to improve the utilance of core material, reduce production cost unshakable in one's determination, can adopt the core material more than two or two is stitched together, and adjacent core material is passed through crooked shape structures to form.Its splicing form is consistent with above-mentioned splicing form unshakable in one's determination, does not repeat them here.Like this, both can reduce the manufacturing materials waste, reduce production costs; Can effectively reduce the iron loss that produces unshakable in one's determination again.
Except above-mentioned iron core, the present invention also provides a kind of Wound iron-core transformer, and the structure of these other each several parts of Wound iron-core transformer please refer to prior art, and this paper repeats no more.
More than Wound iron-core transformer provided by the present invention and iron core thereof are described in detail.Used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection range of claim of the present invention.
Claims (7)
1, a kind of iron core is used for Wound iron-core transformer, and this iron core utilizes core material to roll and forms, and has splicing seams along the direction of its thickness extension, it is characterized in that, described splicing seams is crooked shape seam.
2, iron core according to claim 1 is characterized in that, described crooked shape seam is saw-tooth slot.
3, iron core according to claim 2 is characterized in that, in the described saw-tooth slot, adjacent toothed edge forms 60 degree angles.
4, according to any described iron core of claim 1 to 3, it is characterized in that the material of described iron core is a silicon steel sheet.
5, according to any described iron core of claim 1 to 3, it is characterized in that the material of described iron core is a non-crystaline amorphous metal.
According to any described iron core of claim 1 to 3, it is characterized in that 6, describedly unshakable in one's determination adopt at least two core materials end to end and roll and form, adjacent described core material is by the splicing of crooked shape seam.
7, a kind of Wound iron-core transformer is characterized in that, comprises any described iron core of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910151077A CN101640106A (en) | 2009-07-09 | 2009-07-09 | Wound iron-core transformer and iron core thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910151077A CN101640106A (en) | 2009-07-09 | 2009-07-09 | Wound iron-core transformer and iron core thereof |
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| CN101640106A true CN101640106A (en) | 2010-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910151077A Pending CN101640106A (en) | 2009-07-09 | 2009-07-09 | Wound iron-core transformer and iron core thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360769A (en) * | 2011-06-22 | 2012-02-22 | 丁钰莹 | Open type coiled iron core |
| CN103680887A (en) * | 2012-09-07 | 2014-03-26 | 苏州安泰变压器有限公司 | Novel three-phase three-dimensional wound core distribution transformer and assembly method thereof |
| CN104934198A (en) * | 2015-07-03 | 2015-09-23 | 江苏容天机电科技有限公司 | Iron core with isolating apparatus |
| CN105357942A (en) * | 2015-12-10 | 2016-02-24 | 广西玉柴机器股份有限公司 | Shielding device for intermediate frequency furnace bottom |
-
2009
- 2009-07-09 CN CN200910151077A patent/CN101640106A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360769A (en) * | 2011-06-22 | 2012-02-22 | 丁钰莹 | Open type coiled iron core |
| CN103680887A (en) * | 2012-09-07 | 2014-03-26 | 苏州安泰变压器有限公司 | Novel three-phase three-dimensional wound core distribution transformer and assembly method thereof |
| CN103680887B (en) * | 2012-09-07 | 2016-09-14 | 苏州安泰变压器有限公司 | A kind of three-phase stereo wound core distribution transformer and assembly method thereof |
| CN104934198A (en) * | 2015-07-03 | 2015-09-23 | 江苏容天机电科技有限公司 | Iron core with isolating apparatus |
| CN105357942A (en) * | 2015-12-10 | 2016-02-24 | 广西玉柴机器股份有限公司 | Shielding device for intermediate frequency furnace bottom |
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Application publication date: 20100203 |