CN206758239U - The iron core and transformer of folded appendiron core transformer - Google Patents
The iron core and transformer of folded appendiron core transformer Download PDFInfo
- Publication number
- CN206758239U CN206758239U CN201720550577.9U CN201720550577U CN206758239U CN 206758239 U CN206758239 U CN 206758239U CN 201720550577 U CN201720550577 U CN 201720550577U CN 206758239 U CN206758239 U CN 206758239U
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- iron core
- core
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- groove
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 182
- 238000003825 pressing Methods 0.000 claims description 33
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 28
- 238000003475 lamination Methods 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910000976 Electrical steel Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The utility model is a kind of iron core and transformer of folded appendiron core transformer, is related to electrical equipment technical field, to solve the problems, such as that position skew easily occurs in lamination lamination process each other to be designed.The iron core of the folded appendiron core transformer includes some laminations being stacked, and each lamination includes the first plane and the second plane, and multiple keepers are provided with each lamination.Each keeper includes setting the raised and groove being arranged in the second plane on the first plane, and projection is oppositely arranged with groove, raised and groove match, and the raised grafting on each lamination is arranged in the groove of lamination adjacent thereto.The transformer includes the iron core of above-mentioned folded appendiron core transformer.The iron core and transformer of folded appendiron core transformer provided by the utility model are used to realize the change to alternating voltage in power equipment.
Description
Technical Field
The utility model relates to a power equipment technical field especially relates to a fold iron core and transformer of iron core transformer.
Background
A transformer is an electric power device that changes an alternating voltage using the principle of electromagnetic induction, and can perform voltage conversion, current conversion, impedance conversion, voltage stabilization, and the like in a circuit, and is widely used in various fields such as power supply, machine manufacturing, metallurgy, railways, and the like. The iron core is an important component in the transformer, and is a magnetic circuit and a mounting framework of the transformer. A common transformer core is generally made of a plurality of laminated iron core sheets, and the iron core sheets are made of silicon steel. Silicon steel is a silicon-containing steel, the silicon content of which is generally between 0.8 and 4.8%. Because the silicon steel is a magnetic substance with strong magnetic conductivity, the transformer iron core made of the silicon steel can generate larger magnetic induction intensity in the electrified coil, thereby greatly reducing the volume of the transformer.
However, since the core pieces of the transformer are of a planar sheet structure, in the process of stacking the core pieces, the adjacent two core pieces are easily deviated from each other, so that the outer contours of the stacked core are in a staggered and unevenly arranged bad condition, the subsequent fixing process of the core is greatly influenced, the assembly process of the core in the transformer is laborious, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a fold iron core transformer's iron core to solve the range upon range of in-process of current iron core piece and take place the skew easily each other, cause the technical problem of crisscross phenomenon to appear in the iron core outline.
The utility model provides a fold iron core transformer's iron core, including the iron core piece of a plurality of range upon range of settings, each the iron core piece includes first plane and second plane, and each be provided with the setting element on the iron core piece, the setting element is a plurality of.
Each positioning piece comprises a protrusion arranged on the first plane and a groove arranged on the second plane, and the protrusion and the groove are arranged oppositely.
The protrusions are matched with the grooves, and the protrusions on the iron core pieces are inserted into the grooves of the adjacent iron core pieces.
Further, the height of the convex protrusion is equal to the depth of the groove;
alternatively, the height of the protrusion is less than the depth of the groove.
Furthermore, the number of the positioning pieces is two, and the two positioning pieces are arranged at intervals.
Further, the longitudinal section of the protrusion is rectangular.
Further, the longitudinal section of the protrusion is semicircular.
Further, the iron core plate is in an E shape.
Further, the iron chip is in a shape of a Chinese character 'ri'.
The utility model discloses the beneficial effect that iron core of folding iron core transformer brought is:
the iron core pieces are stacked together through the arrangement of the plurality of iron core pieces, and the plurality of positioning pieces are arranged on the iron core pieces, wherein each iron core piece comprises a first plane and a second plane, each positioning piece comprises a protrusion and a groove, the protrusion is arranged on the first plane of each iron core piece, the groove is arranged on the second plane of each iron core piece, and the protrusion and the groove are arranged oppositely. And, the arch and recess phase-match for the arch can be pegged graft and set up in the recess.
The iron core laminating process of the laminated iron core transformer comprises the following steps: when the lamination processing is carried out on the iron core pieces, the lamination process of the two iron core pieces is taken as an example, the groove on the back iron core piece can be aligned with the protrusion on the front iron core piece, then the back iron core piece is pressed, the protrusion on the front iron core piece is inserted into the groove of the back iron core piece, and therefore the lamination processing of the two iron core pieces is realized. When a plurality of iron core pieces are stacked, the stacking process is similar to that of the two iron core pieces, and details are not repeated here.
The positioning pieces are arranged on the iron core pieces, and the positioning between two adjacent iron core pieces is realized by the positioning pieces, so that the lamination processing of the iron core pieces is realized. The setting of setting element for at range upon range of in-process, the profile homoenergetic of back iron core piece can align with preceding iron core piece, and unlikely emergence skew, the iron core after having avoided the range upon range of to a certain extent appears the crisscross bad situation of position or arranging unevenly, has improved the range upon range of uniformity of the iron core of folding iron core transformer greatly, thereby makes the follow-up fixed process of the iron core of folding iron core transformer realize more easily. And through setting up the setting element, still realized quick, the accurate location installation of each iron core piece to greatly improved the machining efficiency of the iron core of iron core transformer of folding. In addition, the iron core of the laminated iron core transformer is simple in structure and easy to realize, and has important significance on the manufacturing process of the laminated iron core in the transformer.
A second object of the present invention is to provide a transformer to solve the technical problem of low efficiency of the transformer manufacturing process.
The utility model provides a transformer, including the above-mentioned iron core that folds iron core transformer.
Further, the iron core pressing device further comprises a first pressing device used for pressing the iron core of the iron core lamination transformer.
The first pressing device comprises two oppositely arranged clamping plates and two pressing assemblies used for pressing the clamping plates, the two pressing assemblies are symmetrically arranged at two ends of the clamping plates.
And the iron core of the laminated iron core transformer is arranged in a space formed by the two clamping plates.
Furthermore, the second pressing device is used for pressing the iron core of the iron core stacked transformer, and the second pressing device is arranged between the two pressing assemblies.
The number of the second pressing devices is at least one.
The second pressing device comprises a locking strip and convex columns arranged on the clamping plates, the convex columns are arranged on the non-pressing surfaces of the clamping plates, and the locking strip is sleeved on the convex column of one clamping plate and hung on the convex column of the other clamping plate.
The locking strip is an elastic piece.
The utility model discloses beneficial effect that the transformer brought is:
the iron core of the laminated iron core transformer is arranged in the transformer, wherein the structure, the laminating process and the beneficial effects of the iron core of the laminated iron core transformer are explained in detail in the above characters, and are not repeated herein.
This transformer is through setting up the above-mentioned iron core of folding the iron core transformer, in the manufacturing process of transformer, utilize setting element on each iron core piece to realize folding the location of iron core transformer at range upon range of in-process, realized folding the quick location and the accurate assembly of iron core transformer, improved the machining efficiency and the assembly precision of folding the iron core of iron core transformer greatly, not only improved the manufacturing efficiency of transformer, made things convenient for follow-up installation and the fixed process of folding the iron core of iron core transformer greatly moreover, make assembly efficiency improve greatly.
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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic top view of an iron core piece in an iron core of a laminated iron core transformer according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view A-A of the iron chip of FIG. 1;
FIG. 3 is a schematic sectional view A-A of the iron core plate of FIG. 1 in two pieces and pressed together;
FIG. 4 is a schematic sectional view A-A of another iron core plate according to an embodiment of the present invention;
fig. 5 is a schematic top view of another iron core piece in the iron core of the laminated iron core transformer according to the embodiment of the present invention;
fig. 6 is a schematic top view of an installation structure of an iron core of a laminated iron core transformer according to an embodiment of the present invention;
fig. 7 is a front view schematically illustrating a core mounting structure of the laminated core transformer of fig. 6.
Icon: 10-iron core of a laminated iron core transformer; 20-a first hold-down device; 30-a second hold-down device; 11-iron core plate; 12-a positioning element; 121-projection; 122-a groove; 21-clamping plate; 22-a hold down assembly; 31-a convex column; 32-locking strip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-2, the present embodiment provides an iron core 10 of a laminated iron core transformer, including a plurality of iron core sheets 11 stacked in layers, where each iron core sheet 11 includes a first plane and a second plane, and a plurality of positioning members 12 are disposed on each iron core sheet 11. Specifically, in the present embodiment, each positioning element 12 includes a protrusion 121 disposed on a first plane and a groove 122 disposed on a second plane, and the protrusion 121 and the groove 122 are disposed opposite to each other. Moreover, the protrusion 121 is matched with the groove 122, and the protrusion 121 on each iron core plate 11 can be inserted into the groove 122 of the adjacent iron core plate 11, so that the two adjacent iron core plates 11 can be positioned in the stacking process.
The lamination process of the iron core 10 of the laminated iron core transformer is as follows: when the lamination process is performed on the core segments 11, taking the lamination process of two core segments 11 as an example, the groove 122 on the next core segment 11 may be aligned with the protrusion 121 on the previous core segment 11, and then the next core segment 11 is pressed, so that the protrusion 121 on the previous core segment 11 is inserted into the groove 122 of the next core segment 11, thereby implementing the lamination process of two core segments 11. When the lamination process is performed on the plurality of iron core pieces 11, the lamination process is similar to the lamination process of the two iron core pieces 11, and details are not described herein.
By providing the positioning member 12 on each core segment 11, the positioning between two adjacent core segments 11 is realized by the positioning member 12, and the lamination processing of each core segment 11 is further realized. The setting of setting element 12 for at range upon range of in-process, the profile homoenergetic of back iron core piece 11 can align with preceding iron core piece 11, and unlikely emergence skew, the iron core after having avoided the range upon range of to a certain extent appears the crisscross or arranges uneven bad situation in position, has improved the range upon range of uniformity of iron core 10 of folding iron core transformer greatly, thereby makes the follow-up fixed process of iron core 10 of folding iron core transformer realize more easily. Moreover, by arranging the positioning piece 12, the iron core pieces 11 are quickly and accurately positioned and installed, so that the processing efficiency of the iron core 10 of the laminated iron core transformer is greatly improved. In addition, the iron core 10 of the laminated iron core transformer has a simple structure, is easy to realize, and has important significance for the manufacturing process of the laminated iron core in the transformer.
It should be noted that, in the present embodiment, the positioning process of the next core plate 11 and the previous core plate 11 may be a positioning form of positioning the groove 122 on the next core plate 11 and the protrusion 121 on the previous core plate 11, but is not limited to this, and other positioning forms may also be adopted, such as: the protrusion 121 on the next core plate 11 is aligned with the groove 122 on the previous core plate 11 to realize the positioning between two core plates 11, and it is sufficient if the positioning between two adjacent core plates 11 can be realized by such a positioning manner.
As shown in fig. 3, in the present embodiment, the protrusion 121 may protrude by a height equal to the depth of the groove 122. By the arrangement, in the lamination processing process of the iron core plates 11, the first plane/the second plane of the next iron core plate 11 can be tightly attached to the second plane/the first plane of the previous iron core plate 11, so that air gaps among the iron core plates 11 are reduced, magnetic loss and noise of the iron core 10 of the laminated iron core transformer are reduced, and normal and reliable operation of transformer equipment is guaranteed.
It should be noted that, in this embodiment, the protrusion 121 and the groove 122 may be configured in such a manner that the protrusion height of the protrusion 121 is equal to the depth of the groove 122, but is not limited to this configuration, and other configurations may also be adopted, such as: the protrusion height of the protrusion 121 is smaller than the depth of the groove 122, so that the air gap between the core pieces 11 after the lamination process can be minimized, and the stable operation of the transformer can be ensured, therefore, the protrusion 121 and the groove 122 in the above arrangement form can be used for realizing the close adhesion between two adjacent core pieces 11, and reducing the air gap between the two core pieces.
Referring to fig. 1, in the present embodiment, there may be two positioning members 12, and the two positioning members 12 are disposed at intervals.
By arranging two spaced positioning pieces 12 on each iron core piece 11, reliable positioning of the latter iron core piece 11 on the former iron core piece 11 is realized by utilizing the principle of two-point positioning, so that rapid manufacturing and accurate assembly of the iron core 10 of the laminated iron core transformer are realized.
In order to improve the positioning accuracy, in this embodiment, a greater number of positioning members 12 may be further provided, such as: three or four, etc. such setting can improve the positioning accuracy between two adjacent iron core pieces 11 greatly to guarantee range upon range of uniformity, and then guarantee the iron core 10 manufacturing accuracy of this embodiment iron core transformer that folds.
Referring to fig. 2 and fig. 3, in the present embodiment, the longitudinal cross-sectional shape of the protrusion 121 may be rectangular, and correspondingly, the longitudinal cross-sectional shape of the groove 122 is also rectangular.
It should be noted that, in the present embodiment, the longitudinal cross-sectional shapes of the protrusion 121 and the groove 122 may be the above-mentioned rectangular structural form, but are not limited to this structural form, and other structural forms may also be adopted, such as: the longitudinal section of the protrusion 121 may be semicircular, and correspondingly, the longitudinal section of the groove 122 is also semicircular, as shown in fig. 4. Alternatively, the longitudinal sectional shape of the protrusion 121 may be set to be semicircular, and the longitudinal sectional shape of the groove 122 may be set to be rectangular, and the rectangular groove 122 may be capable of accommodating the semicircular protrusion 121 therein. Therefore, the protrusion 121 and the groove 122 can be accommodated in the groove 122, so that the adjacent two iron core pieces 11 can be positioned.
In this embodiment, the core sheet 11 may be an "E" -shaped core sheet shown in fig. 1, and after stacking a plurality of "E" -shaped core sheets, an "E" -shaped iron core is formed; the "h-shaped" core pieces shown in fig. 5 may be laminated to form a "h-shaped" core.
The present embodiment also provides a transformer including the core 10 of the above-described laminated core transformer. By arranging the iron core 10 of the laminated iron core transformer in the transformer, the structure, the laminating process and the beneficial effects of the iron core 10 of the laminated iron core transformer are explained in detail in the above-mentioned text, and are not described again here.
This transformer is through setting up the above-mentioned iron core 10 of folding iron core transformer, in the manufacturing process of transformer, utilize setting element 12 on each iron core piece 11 to realize folding iron core 10 of iron core transformer in the location of range upon range of in-process, the quick location and the accurate assembly of iron core 10 of folding iron core transformer have been realized, the machining efficiency and the assembly precision of iron core 10 of folding iron core transformer have been improved greatly, the manufacturing efficiency of transformer has not only been improved, and the follow-up installation and the fixed course of iron core 10 of folding iron core transformer have greatly been made things convenient for, make assembly efficiency improve greatly.
As shown in fig. 6 and 7, in the present embodiment, the transformer may further include a first compressing device 20 for compressing the core 10 of the laminated core transformer. Specifically, the first pressing device 20 includes two oppositely disposed clamping plates 21 and two pressing assemblies 22 for pressing the two clamping plates 21, where the two pressing assemblies 22 are symmetrically disposed at two ends of the clamping plates 21, and the iron core 10 of the iron core-stacked transformer is disposed in a space formed by the two clamping plates 21.
With continued reference to fig. 6 and 7, in this embodiment, the compression assembly 22 may be a threaded connection. Specifically, two sets of threaded connectors may be respectively disposed at two ends of the clamping plate 21. Due to the arrangement, the two clamping plates 21 can more reliably compress the iron core 10 of the laminated iron core transformer, and the phenomenon that the iron core 10 of the laminated iron core transformer cannot be compressed due to connection failure of one threaded connecting piece is avoided to a certain extent. In addition, the threaded connecting piece is reliable in connection and low in cost.
Through setting up first closing device 20, realized compressing tightly to the iron core 10 of this embodiment iron core transformer, further reduced the air gap between each iron core piece 11, reduced the noise of transformer during operation, improved the operational reliability of this embodiment transformer greatly.
With continued reference to fig. 6 and 7, in the present embodiment, the transformer may further include a second compressing device 30 for compressing the core 10 of the laminated core transformer. Specifically, the second pressing device 30 is disposed between the two pressing assemblies 22, and at least one second pressing device 30 is provided. The second pressing device 30 includes a locking bar 32 and a convex column 31 disposed on each clamping plate 21, the convex column 31 is disposed on a non-pressing surface of each clamping plate 21, and the locking bar 32 is sleeved on the convex column 31 of one clamping plate 21 and hung on the convex column 31 of the other clamping plate 21. Also, the locking strip 32 is an elastic member.
It should be noted that, in this embodiment, two second pressing devices 30 may be provided, as shown in fig. 6 and 7 in particular.
After the first compressing device 20 compresses the iron core 10 of the laminated iron core transformer, the elastic locking strip 32 is sleeved on the two convex columns 31 on the non-compression surface of the clamping plate 21, so that the iron core 10 of the laminated iron core transformer between the compressing assemblies 22 is further compressed.
By arranging the second pressing device 30, the pressing force applied to the iron core 10 of the laminated iron core transformer is more uniform, the unfavorable situation that the air gap between the iron core pieces 11 is too large due to local uneven stress is avoided to a certain extent, and the working reliability of the transformer of the embodiment is further improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. An iron core of a laminated iron core transformer comprises a plurality of iron core sheets (11) which are arranged in a stacked mode, and is characterized in that each iron core sheet (11) comprises a first plane and a second plane, a positioning piece (12) is arranged on each iron core sheet (11), and the number of the positioning pieces (12) is multiple;
each positioning piece (12) comprises a protrusion (121) arranged on the first plane and a groove (122) arranged on the second plane, and the protrusion (121) and the groove (122) are arranged oppositely;
the protrusions (121) are matched with the grooves (122), and the protrusions (121) on each iron core piece (11) are inserted into the grooves (122) of the adjacent iron core pieces (11).
2. The core of a laminated core transformer according to claim 1, wherein the protrusion (121) protrudes by a height equal to a depth of the groove (122);
or,
the protrusion (121) protrudes to a height less than the depth of the groove (122).
3. The iron core of the laminated iron core transformer according to claim 2, wherein the number of the positioning members (12) is two, and the two positioning members (12) are spaced apart from each other.
4. The core of a laminated core transformer according to claim 3, wherein the projections (121) have a rectangular longitudinal sectional shape.
5. The core of a laminated core transformer according to claim 3, wherein the projections (121) have a semicircular shape in longitudinal section.
6. The laminated core transformer core according to any one of claims 1 to 5, wherein said core pieces (11) are "E" -shaped.
7. The core of a laminated core transformer according to any one of claims 1-5, wherein said core pieces (11) are "toroidal".
8. A transformer, characterized by comprising a core (10) of a laminated core transformer according to any one of claims 1-7.
9. The transformer according to claim 8, further comprising a first compression device (20) for compressing the core (10) of the laminated core transformer;
the first pressing device (20) comprises two oppositely arranged clamping plates (21) and two pressing assemblies (22) for pressing the two clamping plates (21), and the two pressing assemblies (22) are symmetrically arranged at two ends of the clamping plates (21);
and the iron core (10) of the laminated iron core transformer is arranged in a space formed by the two clamping plates (21).
10. The transformer of claim 9, further comprising a second compression device (30) for compressing the core (10) of the laminated core transformer, the second compression device (30) being disposed between the two compression assemblies (22);
at least one second pressing device (30);
the second pressing device (30) comprises a locking strip (32) and convex columns (31) arranged on the clamping plates (21), the convex columns (31) are arranged on the non-pressing surfaces of the clamping plates (21), and the locking strip (32) is sleeved on the convex column (31) of one clamping plate (21) and hung on the convex column (31) of the other clamping plate (21);
the locking strip (32) is an elastic piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720550577.9U CN206758239U (en) | 2017-05-16 | 2017-05-16 | The iron core and transformer of folded appendiron core transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720550577.9U CN206758239U (en) | 2017-05-16 | 2017-05-16 | The iron core and transformer of folded appendiron core transformer |
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| Publication Number | Publication Date |
|---|---|
| CN206758239U true CN206758239U (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720550577.9U Expired - Fee Related CN206758239U (en) | 2017-05-16 | 2017-05-16 | The iron core and transformer of folded appendiron core transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172374A (en) * | 2018-02-26 | 2018-06-15 | 国网甘肃省电力公司经济技术研究院 | Transformer core |
| CN112687455A (en) * | 2020-12-22 | 2021-04-20 | 武汉万实新能源科技股份有限公司 | Power-saving iron core |
-
2017
- 2017-05-16 CN CN201720550577.9U patent/CN206758239U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172374A (en) * | 2018-02-26 | 2018-06-15 | 国网甘肃省电力公司经济技术研究院 | Transformer core |
| CN112687455A (en) * | 2020-12-22 | 2021-04-20 | 武汉万实新能源科技股份有限公司 | Power-saving iron core |
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Granted publication date: 20171215 Termination date: 20200516 |