CN113903573A - Three-dimensional star-shaped iron core and transformer - Google Patents
Three-dimensional star-shaped iron core and transformer Download PDFInfo
- Publication number
- CN113903573A CN113903573A CN202111155501.3A CN202111155501A CN113903573A CN 113903573 A CN113903573 A CN 113903573A CN 202111155501 A CN202111155501 A CN 202111155501A CN 113903573 A CN113903573 A CN 113903573A
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- Prior art keywords
- phase
- iron core
- transformer
- star
- cores
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention relates to the technical field of transformer equipment, and discloses a three-dimensional star-shaped iron core and a transformer. The three-dimensional star-shaped iron core is formed by centrally and symmetrically combining three single-phase iron cores, and in a three-phase magnetic circuit formed by combining the three single-phase iron cores, any one phase takes other two phases as a magnetic loop of the three-phase magnetic circuit. The invention can realize the balance of the three-phase magnetic circuit, inhibit the magnetic saturation of the iron core, omit the iron core at the joint compared with the traditional three-phase transformer, reduce the weight and the volume of the transformer, improve the utilization rate of the iron core, thereby reducing the production and transportation cost of the transformer. The invention utilizes the three-dimensional star-shaped iron core to manufacture the transformer, and can ensure that the capacity of the transformer is suitable for various voltage levels so as to meet the ice melting requirements under different conditions.
Description
Technical Field
The invention relates to the technical field of transformer equipment, in particular to a three-dimensional star-shaped iron core and a transformer.
Background
The three-phase transformer used by the traditional direct-current ice melting device is composed of three independent single-phase transformers, and the magnetic circuits of three-phase iron cores are independent respectively. The transformer has the disadvantages of heavy weight and large volume due to the need of three single-phase transformers, which increases the manufacturing and transportation costs, and the possibility of using magnetic circuits alternately is not considered due to the independent magnetic circuits.
Disclosure of Invention
The invention provides a three-dimensional star-shaped iron core and a transformer, which are used for overcoming the defects in the prior art and solving the technical problems of large overall weight and large volume of the traditional transformer and no consideration for the possibility of mutually using magnetic circuits at intervals.
The invention provides a three-dimensional star-shaped iron core, which is formed by centrosymmetrically combining three single-phase iron cores, wherein any one phase in a three-phase magnetic circuit formed by combining the three single-phase iron cores takes other two phases as a magnetic circuit of the phase.
According to one mode of the first aspect of the present invention, each of the single-phase cores is formed by stacking a plurality of silicon steel sheets.
According to a possible mode of the first aspect of the present invention, three single-phase cores are plug-connected.
According to a manner that can be realized by the first aspect of the present invention, each of the single-phase cores is of a C-shaped structure, and short side portions of three single-phase cores are attached to each other.
According to one mode of the first aspect of the present invention, the wall surfaces of the short side portions of the three single-phase cores are each in a triangular shape protruding outward.
According to one mode of the first aspect of the present invention, the short side of the first single-phase core is provided with a first protruding portion, the short side of the second single-phase core is provided with a second protruding portion, and the short side of the third single-phase core is provided with a first groove portion and a second groove portion; the first recess portion is in mating engagement with the first projection portion and the second recess portion is in mating engagement with the second projection portion.
According to one possible mode of the first aspect of the present invention, the short side of the first of the three single-phase cores is provided with a third protruding portion and a fourth protruding portion, the short side of the second single-phase core is provided with a third recessed portion in mating engagement with the third protruding portion, and the short side of the third single-phase core is provided with a fourth recessed portion in mating engagement with the fourth protruding portion.
According to one possible mode of the first aspect of the present invention, each of the single-phase cores is of a zigzag structure.
According to a manner that can be realized by the first aspect of the present invention, the three-dimensional star-shaped iron core is insulated by an interphase air gap.
A second aspect of the invention provides a transformer comprising a three-dimensional star-shaped core as described in any one of the realizable manners above.
According to the technical scheme, the invention has the following advantages:
the three-dimensional star-shaped iron core is formed by centrally and symmetrically combining three single-phase iron cores, and compared with the traditional three-phase transformer, the three-dimensional star-shaped iron core omits an iron core at a joint, can reduce the weight and the volume of the transformer, and improve the utilization rate of the iron core, thereby reducing the production and transportation cost of the transformer; in a three-phase magnetic circuit formed by combining the three single-phase iron cores, any one phase takes other two phases as a magnetic circuit of the phase, so that the three-phase magnetic circuit balance can be realized, and the magnetic saturation of the iron cores is inhibited.
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, and 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 these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a three-dimensional star-shaped iron core according to an alternative embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single-phase iron core according to an alternative embodiment of the present invention;
fig. 3 is a schematic structural diagram of a three-dimensional star-shaped iron core according to another alternative embodiment of the present invention.
Reference numerals:
1-a long side portion; 2-short side part.
Detailed Description
The embodiment of the invention provides a three-dimensional star-shaped iron core and a transformer, which are used for solving the technical problems of large overall weight and large volume of the traditional transformer and no consideration for the possibility of mutually using magnetic circuits among phases.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a three-dimensional star-shaped iron core according to an embodiment of the present invention.
The three-dimensional star-shaped iron core provided by the invention is formed by centrosymmetrically combining three single-phase iron cores, and in a three-phase magnetic circuit formed by combining the three single-phase iron cores, any one phase takes other two phases as a magnetic loop of the phase.
Because the three single-phase iron cores are combined in a centrosymmetric manner, the included angle between adjacent single-phase iron cores in the three-dimensional star-shaped iron core is 120 degrees. Based on the magnetic flux synthesis principle, the sum of the magnetic flux vectors of the middle core column after combination is 0.
The transformer is formed by centrally and symmetrically combining three single-phase iron cores, and compared with the traditional three-phase transformer, the transformer omits the iron core at the joint, so that the weight and the volume of the transformer can be reduced, the utilization rate of the iron core is improved, and the production and transportation cost of the transformer is reduced; in a three-phase magnetic circuit formed by combining the three single-phase iron cores, any one phase takes other two phases as a magnetic circuit of the phase, so that the three-phase magnetic circuit balance can be realized, and the magnetic saturation of the iron cores is inhibited; by applying the iron core structure, the capacity of the transformer can be ensured to meet the operation requirement.
In one implementation manner, each single-phase iron core is formed by laminating a plurality of silicon steel sheets; and the three single-phase iron cores are connected in an inserting manner.
In another way, the single-phase iron core can be formed by winding an iron core strip by an iron core winding machine, wherein the iron core strip can be made of different materials according to different working frequencies of the transformer, and the iron core strip can be made of magnetic materials such as ferrite, amorphous alloy, ultra-thin silicon steel or nanocrystalline.
In one implementation manner, each of the single-phase iron cores is of a C-shaped structure, and short side portions of three single-phase iron cores are attached to each other. The arrangement of the C-shaped structure enables the combined three-dimensional star-shaped iron core to be suitable for primary and secondary winding of the transformer, and magnetic saturation of the iron core of the transformer is inhibited. The specific size of the single-phase iron core can be determined according to the wire diameter of the primary winding and the secondary winding of the transformer and the size of the coil.
The concrete structure of the single-phase iron core with the C-shaped structure is shown in figure 2. The single-phase core of the C-type structure includes a long side portion 1 and a short side portion 2 extending from an end of the long side portion 1. In one embodiment, as shown in fig. 2, the wall surfaces of the short side portions 2 of the three single-phase cores are each in a triangular shape protruding outward, and the corresponding included angle is preferably 120 °. Through the arrangement of the shape, the three-dimensional star-shaped iron core can be conveniently combined, and gaps caused by the connection of three single-phase iron cores are avoided.
In another embodiment, the short side of a first single-phase iron core is provided with a first protruding portion, the short side of a second single-phase iron core is provided with a second protruding portion, and the short side of a third single-phase iron core is provided with a first groove portion and a second groove portion; the first recess portion is in mating engagement with the first projection portion and the second recess portion is in mating engagement with the second projection portion.
In still another embodiment, the short side of the first of the three single-phase cores is provided with a third protruding portion and a fourth protruding portion, the short side of the second single-phase core is provided with a third recessed portion in mating engagement with the third protruding portion, and the short side of the third single-phase core is provided with a fourth recessed portion in mating engagement with the fourth protruding portion.
Through the connection mode that the protrusion is matched with the groove, the three-dimensional star-shaped iron core is more stable and firm.
In another implementation mode, each single-phase iron core is of a clip structure, and the arrangement of the clip structure can enable the combined three-dimensional star-shaped iron core to be suitable for primary and secondary winding windings of the transformer, so that magnetic saturation of the iron core of the transformer is inhibited. The concrete structure of the three-dimensional star-shaped iron core formed by combining the single-phase iron cores with the square-shaped structure is shown in fig. 3.
The single-phase iron core may have other structures, but needs to be adapted to primary and secondary winding windings of a transformer to suppress magnetic saturation of the transformer iron core.
In one implementation manner, the three-dimensional star-shaped iron core is insulated by an interphase air gap.
The invention also provides a transformer which comprises the three-dimensional star-shaped iron core in any one of the embodiments.
The capacity of the transformer can be guaranteed to be suitable for various voltage levels by utilizing the three-dimensional star-shaped iron core to meet ice melting requirements under different conditions, so that the purposes of solving the ice coating disaster of the power transmission line and rapidly recovering power supply are achieved, and the production and life losses brought to the society by the ice coating of the power transmission line are avoided.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The three-dimensional star-shaped iron core is characterized in that the three-dimensional star-shaped iron core is formed by centrosymmetrically combining three single-phase iron cores, and any one phase in a three-phase magnetic circuit formed by combining the three single-phase iron cores takes other two phases as a magnetic circuit of the phase.
2. The stereoscopic star-shaped iron core according to claim 1, wherein each of the single-phase iron cores is formed by laminating a plurality of silicon steel sheets.
3. The stereoscopic star-shaped iron core according to claim 2, wherein three single-phase iron cores are connected in a plug-in manner.
4. The stereoscopic star-shaped iron core according to claim 1, wherein each single-phase iron core is of a C-shaped structure, and short side parts of the three single-phase iron cores are attached to each other.
5. The solid star-shaped iron core as claimed in claim 4, wherein the wall surfaces of the short side portions of the three single-phase iron cores are each in a triangular shape protruding outward.
6. The stereoscopic star-shaped iron core according to claim 4, wherein the short side of a first one of the three single-phase iron cores is provided with a first protruding portion, the short side of a second one of the three single-phase iron cores is provided with a second protruding portion, and the short side of a third one of the three single-phase iron cores is provided with a first groove portion and a second groove portion; the first recess portion is in mating engagement with the first projection portion and the second recess portion is in mating engagement with the second projection portion.
7. The stereoscopic star core of claim 4 wherein a short side of a first of the three single-phase cores is provided with a third protruding portion and a fourth protruding portion, a short side of a second of the three single-phase cores is provided with a third recessed portion in mating engagement with the third protruding portion, and a short side of a third of the three single-phase cores is provided with a fourth recessed portion in mating engagement with the fourth protruding portion.
8. The stereoscopic star-shaped iron core according to claim 1, wherein each single-phase iron core is of a zigzag structure.
9. The solid star-shaped iron core according to claim 1, wherein the solid star-shaped iron core is insulated in a manner of inter-phase air gap insulation.
10. A transformer, characterized by comprising a solid star-shaped core according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111155501.3A CN113903573A (en) | 2021-09-29 | 2021-09-29 | Three-dimensional star-shaped iron core and transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111155501.3A CN113903573A (en) | 2021-09-29 | 2021-09-29 | Three-dimensional star-shaped iron core and transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113903573A true CN113903573A (en) | 2022-01-07 |
Family
ID=79189539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111155501.3A Pending CN113903573A (en) | 2021-09-29 | 2021-09-29 | Three-dimensional star-shaped iron core and transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113903573A (en) |
-
2021
- 2021-09-29 CN CN202111155501.3A patent/CN113903573A/en active Pending
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