CN110299245B - Stepping lamination method for transformer core - Google Patents
Stepping lamination method for transformer core Download PDFInfo
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- CN110299245B CN110299245B CN201910367725.7A CN201910367725A CN110299245B CN 110299245 B CN110299245 B CN 110299245B CN 201910367725 A CN201910367725 A CN 201910367725A CN 110299245 B CN110299245 B CN 110299245B
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- 238000003475 lamination Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 164
- 230000000750 progressive effect Effects 0.000 claims description 10
- 238000010030 laminating Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 230000003247 decreasing effect Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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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
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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
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention discloses a transformer core stepping lamination method, which specifically comprises the following steps: s1) presetting more than one group of silicon steel sheet units, wherein each group of silicon steel sheet unit comprises a first silicon steel sheet group and a second silicon steel sheet group which are circularly arranged in sequence; s2), the first silicon steel sheet groups are staggered in sequence to form a first step, and the second silicon steel sheet groups are laminated in a reverse sequence of the first silicon steel sheet groups or a mode of being less than the number of the first silicon steel sheet groups and performing lamination in the reverse sequence to form a second step; s3) combining the first silicon steel sheet group and the second silicon steel sheet group into an equilateral triangle structure or an unequal triangle structure, and then sequentially stepping in a circulating mode of changing the first silicon steel sheet group and the second silicon steel sheet group into a circulating mode of the first silicon steel sheet group and the second silicon steel sheet group; s4) performing lamination processing on the formed equilateral triangle structure or the non-equilateral triangle structure to form the transformer core. The invention improves the operation efficiency.
Description
Technical Field
The invention relates to the technical field of transformer manufacturing, in particular to a transformer core stepping lamination method.
Background
Iron cores in the transformer industry all adopt a stepping lamination mode, the initial most part of the iron cores are longitudinal stepping structures, in recent years, the iron cores gradually have transverse stepping structures along with the development of automatic lamination of a mechanical arm, but in order to further fully exert the excellent quality of cold-rolled silicon steel sheets, a 45-degree oblique seam is basically commonly used, namely, the lamination joints among the silicon steel sheets of each layer are staggered towards the longitudinal direction or the transverse direction, namely, when the iron cores are stepped, the stepping mode is generally the staggered sequence of a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5, a sixth sheet type 6, so that a cycle is formed, and in the next cycle, the sequence of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5, the sixth sheet type 6 is also adopted, therefore, all the shapes are right-angled triangle structures, as shown in fig. 1, but the overall efficiency is not high regardless of the transverse or longitudinal lamination mode, only a single cycle of sheets can be inserted or stacked at a time, and finally the lamination efficiency is poor, and the sizes of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6 are sequentially decreased in sequence.
Disclosure of Invention
The invention aims to provide a transformer core stepping lamination method, which improves the lamination efficiency of a transformer core by 100 percent and the lamination efficiency by more than 100 percent, and solves the efficiency problem of the prior lamination technology.
In order to achieve the purpose, the invention provides the following technical scheme: a transformer core stepping lamination method specifically comprises the following steps:
s1) presetting more than one group of silicon steel sheet units, wherein each group of silicon steel sheet unit comprises a first silicon steel sheet group and a second silicon steel sheet group which are circularly arranged in sequence;
s2), the first silicon steel sheet groups are staggered in sequence to form a first step, and the second silicon steel sheet groups are laminated in a reverse sequence of the first silicon steel sheet groups or a mode of being less than the number of the first silicon steel sheet groups and performing lamination in the reverse sequence to form a second step;
s3) combining the first silicon steel sheet group and the second silicon steel sheet group into an equilateral triangle structure or an unequal triangle structure, and then sequentially stepping in a circulating mode of changing the first silicon steel sheet group and the second silicon steel sheet group into a circulating mode of the first silicon steel sheet group and the second silicon steel sheet group;
s4) performing lamination processing on the formed equilateral triangle structure or the non-equilateral triangle structure to form the transformer core.
Further, the first silicon steel sheet group comprises a first sheet type, a second sheet type, a third sheet type, a fourth sheet type, a fifth sheet type and a sixth sheet type, and longitudinal lamination stepping is performed from top to bottom according to a progressive mode of the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type, the second silicon steel sheet group also comprises the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type, and the longitudinal lamination stepping is performed from top to bottom according to a descending mode of the sixth sheet type, the fifth sheet type, the fourth sheet type, the third sheet type, the second sheet type and the first sheet type sequentially; and the first silicon steel sheet group and the second silicon steel sheet group form an equilateral triangle structure, then the first silicon steel sheet group and the second silicon steel sheet group are sequentially and circularly stepped, and the sizes of the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type are sequentially decreased progressively according to the sequence.
Further, the first silicon steel sheet group comprises a first sheet type, a second sheet type, a third sheet type, a fourth sheet type, a fifth sheet type and a sixth sheet type, and longitudinal lamination stepping is performed from top to bottom according to the progressive sequence of the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type, the second silicon steel sheet group also comprises the second sheet type, the third sheet type, the fourth sheet type and the fifth sheet type, and the second silicon steel sheet group performs longitudinal lamination stepping from top to bottom according to the descending sequence of the fifth sheet type, the fourth sheet type, the third sheet type and the second sheet type; and the first silicon steel sheet group and the second silicon steel sheet group form a scalene triangle structure, then the first silicon steel sheet group and the second silicon steel sheet group are sequentially and circularly stepped, and the sizes of the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type are sequentially decreased progressively according to the sequence.
Further, the first silicon steel sheet group comprises a first sheet type, a second sheet type, a third sheet type, a fourth sheet type, a fifth sheet type and a sixth sheet type, and longitudinal lamination stepping is performed from top to bottom according to a progressive mode of the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type, the second silicon steel sheet group also comprises the first sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type, and the second silicon steel sheet group performs longitudinal lamination stepping from top to bottom according to a descending mode of the sixth sheet type, the fifth sheet type, the fourth sheet type, the third sheet type and the first sheet type in sequence; and the first silicon steel sheet group and the second silicon steel sheet group form a scalene triangle structure, then the first silicon steel sheet group and the second silicon steel sheet group are sequentially and circularly stepped, and the sizes of the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type are sequentially decreased progressively according to the sequence.
Further, the total number of steps of the first silicon steel sheet group and the second silicon steel sheet group in the second silicon steel sheet group is 3 steps or more, and the first sheet type, the second sheet type, the third sheet type, the fourth sheet type, the fifth sheet type and the sixth sheet type are 1 sheet or 2 sheets respectively.
Compared with the prior art, the lamination mode of the invention can lead 12 sheets or more to be inserted at one time when the transformer iron core is laminated, and better, the yoke sheets of all silicon steel sheets are inserted at one time through other auxiliary assembly mechanisms, the efficiency is improved by one time or more than 10 times compared with that of the original equivalent stepping mode which only has 6 sheets at one time, finally the lamination efficiency of the transformer iron core is improved by 100 percent, the lamination efficiency is improved by more than 100 percent, and the efficiency problem existing in the prior lamination technology is solved.
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, 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 the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art transformer lamination method;
fig. 2 is a schematic view of a group of first silicon steel sheets and a group of second silicon steel sheets stacked together in a step lamination method for a transformer core in example 1;
fig. 3 is a schematic structural view illustrating a structure of three groups of first silicon steel sheets and three groups of second silicon steel sheets stacked together in a step-by-step lamination method for a transformer core in example 1;
FIG. 4 is a schematic view of a first set of silicon steel sheets and a second set of silicon steel sheets stacked together in a step-by-step lamination method for a transformer core in example 2;
fig. 5 is a schematic structural view illustrating a structure of four groups of first silicon steel sheets and two groups of second silicon steel sheets stacked together in a step-by-step lamination method for a transformer core in embodiment 2;
FIG. 6 is a schematic view of a set of first silicon steel sheets and a set of second silicon steel sheets stacked together in a step-by-step lamination method for a transformer core in example 3;
fig. 7 is a schematic structural view illustrating a structure of four groups of first silicon steel sheet groups and two groups of second silicon steel sheet groups stacked in a transformer core stepping lamination method in embodiment 3.
In the figure: a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5, a sixth sheet type 6, a first silicon steel sheet group 7 and a second silicon steel sheet group 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments 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. 1-7, the present invention will be further explained:
example 1:
as shown in fig. 2, the method for stepping and laminating a transformer core provided in this embodiment specifically includes the following steps:
s1, presetting more than one group of silicon steel sheet units, wherein each group of silicon steel sheet unit comprises a first silicon steel sheet group 7 and a second silicon steel sheet group 8 which are circularly arranged in sequence;
s2, the first silicon steel sheet group 7 is staggered in sequence to form a first stepping, and the second silicon steel sheet group 8 is laminated in a mode of laminating in the reverse sequence of the first silicon steel sheet group 7 or in a mode of laminating less than the number of the first silicon steel sheet group 7 in the reverse sequence to form a second stepping;
s3, forming the first silicon steel sheet group 7 and the second silicon steel sheet group 8 into an equilateral triangle structure or an equilateral triangle structure, and then circularly changing the first silicon steel sheet group 7 and the second silicon steel sheet group 8 into a circular mode of the first silicon steel sheet group 7 and the second silicon steel sheet group 8 to be sequentially stepped;
and S4, performing lamination processing on the formed equilateral triangle structure or the non-equilateral triangle structure to form the transformer core.
As shown in fig. 3, the first silicon steel sheet group 7 includes a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5 and a sixth sheet type 6, and the longitudinal lamination stepping is performed from top to bottom in a progressive manner of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6, the second silicon steel sheet group 8 also includes the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6, and the longitudinal lamination stepping is performed from top to bottom in a descending manner of the sixth sheet type 6, the fifth sheet type 5, the fourth sheet type 4, the third sheet type 3, the second sheet type 2 and the first sheet type 1 in sequence; and the first silicon steel sheet group 7 and the second silicon steel sheet group 8 form an equilateral triangle structure, then the first silicon steel sheet group 7 and the second silicon steel sheet group 8 are sequentially and circularly stepped, and the sizes of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6 are sequentially decreased progressively according to the sequence.
The specific method comprises the following steps:
as shown in fig. 3, in the first step, a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5 and a sixth sheet type 6 are stacked step by step, and the first silicon steel sheet group 7 with a certain interval is formed after the iron core laminations are stacked;
step two, stacking a sixth sheet 6, a fifth sheet 5, a fourth sheet 4, a third sheet 3, a second sheet 2 and a first sheet 1 step by step, and forming a second silicon steel sheet group 8 in order at a certain interval after stacking the iron core laminations;
thirdly, forming the first silicon steel sheet group 7 and the second silicon steel sheet group 8 into an equilateral triangle structure;
and fourthly, continuously and circularly laminating the first silicon steel sheet group 7 and the second silicon steel sheet group 8 in sequence to form the transformer core, and realizing a 12-sheet inserting mode when the lamination is inserted.
Example 2:
as shown in fig. 4, in the transformer core stepping lamination method provided by this embodiment, further, the first silicon steel sheet group 7 includes a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5 and a sixth sheet type 6, and performs longitudinal lamination stepping from top to bottom according to a progressive order of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6, the second silicon steel sheet group 8 also includes the second sheet type 2, the third sheet type 3, the fourth sheet type 4 and the fifth sheet type 5, and the second silicon steel sheet group 8 performs longitudinal lamination stepping from top to bottom according to a decreasing order of the fifth sheet type 5, the fourth sheet type 4, the third sheet type 3 and the second sheet type 2; and the first silicon steel sheet group 7 and the second silicon steel sheet group 8 form a scalene triangle structure, then the first silicon steel sheet group 7 and the second silicon steel sheet group 8 are sequentially and circularly stepped, and the sizes of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6 are sequentially decreased progressively according to the sequence.
The specific method comprises the following steps:
as shown in fig. 5, in the first step, a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5 and a sixth sheet type 6 are stacked step by step, and the first silicon steel sheet group 7 with a certain interval is formed after the iron core laminations are stacked;
step two, stacking a fifth sheet 5, a fourth sheet 4, a third sheet 3 and a second sheet 2 step by step, and forming a second silicon steel sheet group 8 in order at a certain interval after stacking the iron core laminations;
thirdly, the first silicon steel sheet group 7 and the second silicon steel sheet group form an inequilateral triangle structure;
and fourthly, continuously and circularly laminating the first silicon steel sheet group 7 and the second silicon steel sheet group 8 in sequence to form the transformer core.
Example 3:
as shown in fig. 6, in the transformer core stepping lamination method provided by this embodiment, the first silicon steel sheet group 7 includes a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5 and a sixth sheet type 6, and performs longitudinal lamination stepping from top to bottom in a progressive manner of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6, the second silicon steel sheet group 8 also includes the first sheet type 1, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6, and the second silicon steel sheet group 8 performs longitudinal lamination stepping from top to bottom in a descending manner of the sixth sheet type 6, the fifth sheet type 5, the fourth sheet type 4, the third sheet type 3 and the first sheet type 1 in sequence; and the first silicon steel sheet group 7 and the second silicon steel sheet group 8 form a scalene triangle structure, then the transformer core is formed by sequentially and circularly stepping according to the sequence of the first silicon steel sheet group 7 and the second silicon steel sheet group 8, and the sizes of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6 are sequentially decreased progressively according to the sequence.
Further, the total number of steps of the first silicon steel sheet group 7 and the second silicon steel sheet group 8 in the second silicon steel sheet group 8 is 3 steps or more, and each of the first sheet type 1, the second sheet type 2, the third sheet type 3, the fourth sheet type 4, the fifth sheet type 5 and the sixth sheet type 6 is 1 sheet or 2 sheets.
The specific method comprises the following steps:
as shown in fig. 7, in the first step, a first sheet type 1, a second sheet type 2, a third sheet type 3, a fourth sheet type 4, a fifth sheet type 5 and a sixth sheet type 6 are stacked step by step, and the first silicon steel sheet group 7 with a certain interval is formed after the iron core laminations are stacked;
step two, stacking a sixth sheet 6, a fifth sheet 5, a fourth sheet 4, a third sheet 3 and a first sheet 1 step by step, and forming a second silicon steel sheet group 8 in order at a certain interval after stacking the iron core laminations;
thirdly, the first silicon steel sheet group 7 and the second silicon steel sheet group 8 form an inequilateral triangle structure;
and fourthly, sequentially and circularly stepping the first silicon steel sheet group 7 and the second silicon steel sheet group 8 in sequence to form the transformer core.
The above description is only a few main methods of the present invention, and other non-right-angled triangle-structured cyclic lamination methods by analogy belong to the technical scope of the present invention, including two sheets per step and one stack.
The lamination mode of the invention can insert 12 sheets or more at one time when the transformer iron core is laminated, and better, the yoke sheets of all silicon steel sheets are inserted at one time through other auxiliary assembly mechanisms, and the efficiency is improved by one time or more than 10 times compared with the efficiency of only 6 sheets at one time in the original equivalent stepping mode.
For example:
the thickness of a transformer iron core is 300mm, the thickness of silicon steel sheets is 0.23mm, 1266 sheets are arranged on each iron core column and each iron yoke, a manipulator needs to operate 211 times according to the original 6-sheet lamination, and the manipulator only needs to operate 106 times after the method is adopted, so that half of time is saved; meanwhile, when the yoke piece is manually inserted, the original manual operation needs 211 times, the required time is about 40 minutes, the method only needs 106 times of operation, only needs about 20 minutes, and further, if the upper yoke is fixed by other mechanisms, the upper yoke can be inserted once, the time only needs 3 minutes, and the production efficiency is greatly improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (2)
1. A transformer core stepping lamination method is characterized by comprising the following steps:
s1) presetting more than one group of silicon steel sheet units, wherein each group of silicon steel sheet unit comprises a first silicon steel sheet group (7) and a second silicon steel sheet group (8) which are circularly arranged in sequence;
s2), the first silicon steel sheet group (7) is staggered in sequence to form a first stepping, and the second silicon steel sheet group (8) is laminated in a mode of laminating in a reverse sequence of the first silicon steel sheet group (7) or less than the first silicon steel sheet group (7) and in the reverse sequence to form a second stepping;
s3) forming the first silicon steel sheet group (7) and the second silicon steel sheet group (8) into an equilateral triangle structure or an equilateral triangle structure, and then circularly changing the first silicon steel sheet group (7) and the second silicon steel sheet group (8) into a circular mode of the first silicon steel sheet group (7) and the second silicon steel sheet group (8) to be sequentially stepped;
s4) carrying out lamination processing on the formed equilateral triangle structure or the non-equilateral triangle structure to form a transformer core;
wherein, the form that the first silicon steel sheet group (7) and the second silicon steel sheet group (8) form an equilateral triangle structure or a scalene triangle structure comprises the following three forms:
the first silicon steel sheet group (7) comprises a first sheet type (1), a second sheet type (2), a third sheet type (3), a fourth sheet type (4), a fifth sheet type (5) and a sixth sheet type (6), and the longitudinal lamination stepping is carried out from top to bottom according to the progressive mode of a first sheet type (1), a second sheet type (2), a third sheet type (3), a fourth sheet type (4), a fifth sheet type (5) and a sixth sheet type (6), the second silicon steel sheet group (8) also comprises a first sheet type (1), a second sheet type (2), a third sheet type (3), a fourth sheet type (4), a fifth sheet type (5) and a sixth sheet type (6), the second silicon steel sheet group (8) performs longitudinal lamination stepping in a descending manner from top to bottom according to the sequence of a sixth sheet type (6), a fifth sheet type (5), a fourth sheet type (4), a third sheet type (3), a second sheet type (2) and the first sheet type (1); the first silicon steel sheet group (7) and the second silicon steel sheet group (8) form an equilateral triangle structure, then the first silicon steel sheet group (7) and the second silicon steel sheet group (8) are sequentially and circularly stepped, and the sizes of the first sheet type (1), the second sheet type (2), the third sheet type (3), the fourth sheet type (4), the fifth sheet type (5) and the sixth sheet type (6) are sequentially reduced in a descending manner according to the sequence;
the second type is that the first silicon steel sheet group (7) comprises a first sheet type (1), a second sheet type (2), a third sheet type (3), a fourth sheet type (4), a fifth sheet type (5) and a sixth sheet type (6), longitudinal lamination stepping is performed from top to bottom according to the progressive sequence of the first sheet type (1), the second sheet type (2), the third sheet type (3), the fourth sheet type (4), the fifth sheet type (5) and the sixth sheet type (6), the second silicon steel sheet group (8) also comprises the second sheet type (2), the third sheet type (3), the fourth sheet type (4) and the fifth sheet type (5), and the second silicon steel sheet group (8) performs longitudinal lamination stepping from top to bottom according to the progressive sequence of the fifth sheet type (5), the fourth sheet type (4), the third sheet type (3) and the second sheet type (2); the first silicon steel sheet group (7) and the second silicon steel sheet group (8) form a scalene triangle structure, then the first silicon steel sheet group (7) and the second silicon steel sheet group (8) are sequentially and circularly stepped, and the sizes of the first sheet type (1), the second sheet type (2), the third sheet type (3), the fourth sheet type (4), the fifth sheet type (5) and the sixth sheet type (6) are sequentially reduced in a descending manner according to the sequence;
the third type is that the first silicon steel sheet group (7) comprises a first sheet type (1), a second sheet type (2), a third sheet type (3), a fourth sheet type (4), a fifth sheet type (5) and a sixth sheet type (6), and the longitudinal lamination stepping is carried out from top to bottom according to the progressive mode of a first sheet type (1), a second sheet type (2), a third sheet type (3), a fourth sheet type (4), a fifth sheet type (5) and a sixth sheet type (6), the second silicon steel sheet group (8) also comprises a first sheet type (1), a third sheet type (3), a fourth sheet type (4), a fifth sheet type (5) and a sixth sheet type (6), the second silicon steel sheet group (8) performs longitudinal lamination stepping in a descending manner from top to bottom according to the sequence of a sixth sheet type (6), a fifth sheet type (5), a fourth sheet type (4), a third sheet type (3) and the first sheet type (1); and the first silicon steel sheet group (7) and the second silicon steel sheet group (8) form a scalene triangle structure, then the first silicon steel sheet group (7) and the second silicon steel sheet group (8) are sequentially and circularly stepped, and the sizes of the first sheet type (1), the second sheet type (2), the third sheet type (3), the fourth sheet type (4), the fifth sheet type (5) and the sixth sheet type (6) are sequentially reduced in a descending manner according to the sequence.
2. A transformer core stepping lamination method according to claim 1, wherein: the total number of steps of the first silicon steel sheet group (7) and the second silicon steel sheet group (8) is 3 steps or more, and the first sheet type (1), the second sheet type (2), the third sheet type (3), the fourth sheet type (4), the fifth sheet type (5) and the sixth sheet type (6) are respectively 1 sheet or 2 sheets.
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| CN116344169A (en) * | 2023-03-27 | 2023-06-27 | 南京大全变压器有限公司 | Iron core structure for reducing stray loss of oil immersed transformer |
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