CN111724972A - Three-dimensional roll iron core structure and transformer - Google Patents

Three-dimensional roll iron core structure and transformer Download PDF

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Publication number
CN111724972A
CN111724972A CN202010612602.8A CN202010612602A CN111724972A CN 111724972 A CN111724972 A CN 111724972A CN 202010612602 A CN202010612602 A CN 202010612602A CN 111724972 A CN111724972 A CN 111724972A
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China
Prior art keywords
insulating
core
insulating member
coil
coated
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CN202010612602.8A
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Chinese (zh)
Inventor
许凯旋
许权安
张启立
谭卫锋
戚宇祥
郑玲
方文杰
周宇成
张学明
李飞
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Tritype Electric Co ltd
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Tritype Electric Co ltd
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Priority to CN202010612602.8A priority Critical patent/CN111724972A/en
Publication of CN111724972A publication Critical patent/CN111724972A/en
Pending legal-status Critical Current

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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
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/341—Preventing or reducing no-load losses or reactive currents

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)

Abstract

The invention discloses a three-dimensional wound iron core structure and a transformer, wherein the three-dimensional wound iron core structure comprises an iron core and a first insulating layer, the iron core comprises a core column and an iron yoke connected with the core column, an included angle is formed between the core column and the iron yoke, a corner part is formed, and the first insulating layer is coated or coated on the surface of the corner part. When the three-dimensional wound core structure is used, the core column and the iron yoke are arranged in an included angle, and the corner part is formed and coated or coated with the first insulating layer, so that when the distance between the coil and the iron yoke is reduced, the coil cannot discharge at the corner, and the sizes of the transformer core and the coil can be reduced; further, compared with the traditional transformer which adopts the mode that the air distance between the iron core and the electrified part of the coil is increased to ensure the insulation performance between the coil and the iron core, the no-load loss and the load loss of the transformer can be reduced by coating or wrapping the first insulation layer on the corner part.

Description

Three-dimensional roll iron core structure and transformer
Technical Field
The invention relates to the technical field of transformers, in particular to a three-dimensional coil iron core structure and a transformer.
Background
The quality of the insulating performance of the dry-type transformer plays a decisive role in the safe operation of the product, so the design of the insulating structure and the selection of materials of the dry-type transformer are very important. In a conventional dry-type transformer, the air distance between an iron core and an electrified part of a coil is generally increased to ensure the insulation performance between the coil and the iron core, and thus, the insulation performance between the coil and the iron core is ensured by using air as an insulation medium.
However, in order to ensure the insulation performance of the conventional dry-type transformer, the above insulation method is adopted, and the sizes of the transformer core and the coil are often increased, so that the no-load loss and the load loss of the transformer are increased.
Disclosure of Invention
Based on this, to the problem that the size of transformer core and coil often need to be increased in order to guarantee insulating properties for traditional dry-type transformer, and then increased the no-load loss and the load loss of transformer, provided is a three-dimensional book iron core structure and transformer, this three-dimensional book iron core structure and transformer can reduce the no-load loss and the load loss of transformer.
The specific technical scheme is as follows:
on the one hand, the application relates to a three-dimensional iron core structure of rolling up, including unshakable in one's determination and first insulating layer, unshakable in one's determination includes the stem and with the yoke that the stem is connected, the stem with be the contained angle setting between the yoke and be formed with corner portion, first insulating layer coating or cladding in corner portion's surface.
When the three-dimensional wound core structure is used, the corner part formed between the core column and the iron yoke is coated or coated with the first insulating layer, so that when the distance between the coil and the iron yoke is reduced, the coil does not discharge at the corner part, and the sizes of the transformer core and the coil can be reduced; further, compared with the traditional transformer which adopts the mode that the air distance between the iron core and the electrified part of the coil is increased to ensure the insulation performance between the coil and the iron core, the no-load loss and the load loss of the transformer can be reduced by coating or wrapping the first insulation layer on the corner part.
The technical solution is further explained below:
in one embodiment, the first insulating layer comprises a first section and a second section connected with the first section, the first section is coated or wrapped on the part of the corner part positioned on the stem, the second section is coated or wrapped on the part of the corner part positioned on the iron yoke, and the width of the first section positioned on the stem is H1, wherein 55mm is larger than or equal to H1; the width of the second section on the iron yoke is H2, wherein 55mm is less than or equal to H2.
In one embodiment, the first insulating layer includes at least one layer of first insulating member and at least one layer of second insulating member, and the first insulating member and the second insulating member are stacked according to a predetermined stacking rule.
In one embodiment, the first insulating member is silicon rubber, and the second insulating member is aramid paper; or the first insulating part is aramid paper, and the second insulating part is silicon rubber.
In one embodiment, the core column further comprises a second insulating layer, and the second insulating layer is coated or wrapped on the surface of the core column.
In one embodiment, the second insulating layer includes at least one third insulating member and at least one fourth insulating member, and the third insulating member and the fourth insulating member are stacked according to a predetermined stacking rule.
In one embodiment, the iron yoke further comprises a third insulating layer, and the third insulating layer is coated or cladded on the surface of the iron yoke.
In one embodiment, the third insulating layer includes at least one fifth insulating member and at least one sixth insulating member, and the fifth insulating member and the sixth insulating member are stacked according to a predetermined stacking rule.
In one embodiment, the fifth insulating member is silicon rubber, and the sixth insulating member is aramid paper; or the fifth insulating part is aramid paper, and the sixth insulating part is silicon rubber.
In another aspect, the present application further relates to a transformer including the three-dimensional coil core structure in any of the above embodiments.
When the transformer is used, the first insulating layer is coated or coated on the corner part formed between the core column and the iron yoke, so that when the distance between the coil and the iron yoke is reduced, the coil does not discharge at the corner part, and the sizes of the transformer core and the coil can be reduced; further, compared with the traditional transformer which adopts the mode that the air distance between the iron core and the electrified part of the coil is increased to ensure the insulation performance between the coil and the iron core, the no-load loss and the load loss of the transformer can be reduced by coating or wrapping the first insulation layer on the corner part.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale.
FIG. 1 is a schematic structural view of a three-dimensional coil core according to an embodiment;
FIG. 2 is a schematic structural view of a three-dimensional coil core according to another embodiment;
FIG. 3 is a schematic structural view of a three-dimensional coil core according to another embodiment;
FIG. 4 is a schematic structural view of a three-dimensional coil core according to another embodiment;
fig. 5 is a schematic structural view of a three-dimensional coil core according to another embodiment.
Description of reference numerals:
10. a three-dimensional coil iron core structure; 100. an iron core; 102. an iron core single frame; 1022. a core limb; 1024. an iron yoke; 110. a stem; 130. a corner portion; 200. a first insulating layer; 210. a first stage; 220. a second stage; 300. a second insulating layer; 400. and a third insulating layer.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The quality of the insulating performance of the dry-type transformer plays a decisive role in the safe operation of the product, so the design of the insulating structure and the selection of materials of the dry-type transformer are very important. In a conventional dry-type transformer, the air distance between an iron core and an electrified part of a coil is generally increased to ensure the insulation performance between the coil and the iron core, and thus, the insulation performance between the coil and the iron core is ensured by using air as an insulation medium. However, in order to ensure the insulation performance of the conventional dry-type transformer, the above insulation method is adopted, and the sizes of the transformer core and the coil are often increased, so that the no-load loss and the load loss of the transformer are increased. In order to reduce the size of the transformer core and the coil, a distance between the coil and the yoke is often reduced by those skilled in the art to reduce the size of the core and the coil, however, when the distance between the coil and the yoke is reduced, the coil discharges to the yoke or the coil discharges to the leg or the coil discharges to the yoke and the leg at the same time, which puzzles the persons skilled in the art for a long time to further reduce the size of the core and the coil, thereby forming a consensus in the art that the size of the coil and the core cannot be further reduced. Through a plurality of tests and repeated researches, the application discovers that when the distance between the coil and the iron yoke is reduced, a discharging phenomenon can occur at a corner part formed between the core column and the iron yoke, and the discharging at the corner part can directly influence the safety performance of the transformer, so that a person skilled in the art can not reduce the distance between the coil and the iron yoke, and the insulating performance between the coil and the iron core is ensured by increasing the air distance between the iron core and the electrified part of the coil. It can be seen that the first insulating layer is arranged at the corner portion to prevent the coil from discharging to the iron yoke or the coil from discharging to the iron column or the coil simultaneously discharging to the iron yoke and the iron column, so that the consensus that the coil and the iron core cannot be further reduced in the field is broken.
Referring to fig. 1 and 2, an embodiment of a three-dimensional wound core structure 10 includes a core 100 and a first insulating layer 200, the core 100 includes a core leg 110 and an iron yoke 1024 connected to the core leg 110, the core leg 110 and the iron yoke 1024 form an included angle therebetween and form a corner portion 130, and the first insulating layer 200 is coated or wrapped on a surface of the corner portion 130.
When the three-dimensional wound core structure 10 is used, the corner portion 130 formed between the core leg 110 and the yoke 1024 is coated or wrapped with the first insulating layer 200, so that when the distance between the coil and the yoke 1024 is reduced, the coil does not discharge at the corner portion 130, and the sizes of the transformer core 100 and the coil can be reduced; further, the present application can reduce the no-load loss and the load loss of the transformer by coating or wrapping the first insulating layer 200 on the corner portion 130, compared to the conventional transformer which adopts the increase of the air distance between the core 100 and the charged portion of the coil to ensure the insulating property between the coil and the core 100.
Referring to fig. 3, in one embodiment, the first insulating layer 200 includes a first section 210 and a second section 220 connected to the first section 210, the first section 210 is coated or wrapped on a portion of the corner 130 located on the stem 110, the second section 220 is coated or wrapped on a portion of the corner 130 located on the yoke 1024, and the first section 210 on the stem 110 has a width H1, wherein 55mm ≦ H1; thus, within this range, it is possible to ensure the insulation performance at the corner 130, and to ensure that the portion of the corner 130 at the stem 110 does not discharge when the distance between the coil and the yoke 1024 is reduced; specifically, H1 may be 55mm, 60mm and 65 mm; preferably, H1 is 60mm, and the width of the first section 210 ensures better insulation at the corner 130 while keeping the distance between the coil and the iron yoke 1024 small.
Wherein the width of the first segment 210 located on the stem 110 refers to the maximum width of the first segment 210 located on the stem 110. The width direction refers to the labeled direction in FIG. 3.
Referring to FIG. 3, the second section 220 of the yoke 1024 has a width H2, wherein 55mm is smaller than or equal to H2. Thus, within this range, it is possible to ensure the insulation performance at the corner 130, and to ensure that the portion of the corner 130 on the iron yoke 1024 does not discharge when the distance between the coil and the iron yoke 1024 is reduced; specifically, H2 can be 55mm, 60mm, 65mm, etc.; preferably, H2 is 60mm, and in this range, the insulation performance at corner 130 can be ensured to be better, and the distance between the coil and the iron yoke 1024 can be kept small.
Here, the width of the second section 220 located on the iron yoke 1024 refers to the maximum width of the second section 220 located on the iron yoke 1024. The width direction refers to the labeled direction in FIG. 3.
Further, the first section 210 is connected with one end of the second section 220, the end of the other end of the second section 220 is arc-shaped, the arc angle is a, wherein a is more than or equal to 90 degrees and less than or equal to 180 degrees. Within this range, the insulating performance at the corner 130 can be ensured, and the portion of the corner 130 on the iron yoke 1024 is prevented from discharging when the distance between the coil and the iron yoke 1024 is reduced; specifically, a may be 90 °, 120 °, and 180 °; preferably, a is 120 °, and at this angle, the insulation performance at the corner 130 can be ensured to be better, and the distance between the coil and the iron yoke 1024 can be kept small.
It will be appreciated that the other end of the second segment 220 terminates in an arc, wherein the arc angle should be an angle equal to the corresponding central angle of the arc portion.
Further, referring to fig. 1 and 2, the iron core 100 includes three iron core single frames 102, each of the iron core single frames 102 is provided with a core leg 1022 and an iron yoke 1024, the three iron core single frames 102 are spliced two by two, two adjacent core legs 1022 are spliced to form a core leg 110, the core leg 110 and two adjacent iron yokes 1024 form two corner portions 130, and the first insulating layer 200 is coated or coated on the surfaces of the two adjacent corner portions 130. Thus, the first insulating layer 200 is coated or wrapped on the two adjacent corner portions 130 at the same time, so that the insulating performance at the corner portions 130 can be ensured to be better, and the distance between the coil and the iron yoke 1024 can be kept to be smaller.
Specifically, in one embodiment, the first insulating layer 200 includes at least one layer of first insulating members and at least one layer of second insulating members, and the first insulating members and the second insulating members are stacked according to a predetermined stacking rule. The arrangement of the first insulating layer 200 may be; one layer of the first insulating member is coated or wrapped on the surface of the corner portion 130, and the rest of the first insulating members are sequentially stacked on the one layer of the first insulating member, and then one layer of the second insulating member is coated or wrapped on the surface of the first insulating member, and the rest of the second insulating members are sequentially stacked on the one layer of the second insulating member. Or, the first insulating member and the second insulating member are alternately stacked in sequence; there are many stacking ways, and the specific stacking way is set according to the needs of users.
In one embodiment, a first insulating member is coated or wrapped on the surface of the corner 130 and a second insulating member is coated or wrapped on the surface of the first insulating member. Therefore, the insulating effect of the first insulating part can be ensured by coating the second insulating part on the surface of the first insulating part. Further, when the first insulating layer 200 is disposed, the first insulating member may be disposed with an insulating member having a good compactness, so that the number of micro holes similar to the pinhole is small or no micro holes are present in the first insulating member having a good compactness, which may reduce the probability of discharging in the micro holes of the coil or prevent the coil from discharging in the micro holes, thereby improving the insulating performance of the corner portion 130; the second insulating member may be an insulating member having good electrical and mechanical properties, so as to improve the insulating and mechanical properties of the first insulating layer 200, and simultaneously, may play a role in protecting the first insulating member.
Specifically, the first insulating member is silicon rubber, which has good compactness and can improve the insulating property of the corner portion 130 when the silicon rubber is used as the first insulating member.
Specifically, the second insulating member is aramid paper. The aramid paper has good electrical properties and lasting thermal stability. The aramid paper has the most outstanding characteristics of high temperature resistance, long-term use at a high temperature of 220 ℃ without aging, long-term maintenance of electrical and mechanical properties for 10 years, and excellent dimensional stability, wherein the thermal shrinkage rate is only 1% at about 250 ℃, the aramid paper does not shrink, embrittle, soften or melt even exposed to a high temperature of 300 ℃ for a short time, the aramid paper starts to decompose at a strong temperature of more than 370 ℃, and the aramid paper starts to carbonize at about 400 ℃. Meanwhile, the aramid paper also has outstanding flame retardance, the percentage of the volume of oxygen required by the material for combustion in the air is called as the limiting oxygen index, the larger the limiting oxygen index is, the better the flame retardance is, the oxygen content in the air is usually 21%, and the limiting oxygen index of the aramid paper is more than 29%, and the aramid paper belongs to flame-retardant fibers, so that the aramid paper cannot combust in the air, does not support combustion and has self-extinguishing property. In addition, the aramid paper has excellent electrical insulation, the aramid dielectric constant is very low, the inherent dielectric strength enables the aramid paper to keep excellent electrical insulation under the conditions of high temperature, low temperature and high humidity, and the insulation paper prepared by the aramid paper has breakdown voltage resistance reaching 40KV/mm, so that the aramid paper is a recognized optimal insulation material. Meanwhile, the aramid paper has excellent chemical stability, and the chemical structure of the aramid paper is extremely stable, so that the aramid paper can resist corrosion of most high-concentration inorganic acids and other chemicals, and can resist hydrolysis and steam corrosion. In addition, the aramid paper has excellent mechanical properties and ultra-strong radiation resistance, is a flexible high polymer material, has the same spinnability as common fibers due to the low rigidity and high elongation, can be processed into various fabrics or non-woven fabrics by a conventional spinning machine, is wear-resistant and tear-resistant, and has a very wide application range; the aramid paper has excellent resistance to radiation of alpha, beta, chi rays and ultraviolet rays. After 50Kv X-ray radiation for 100 hr, the fiber strength is maintained 73%, and the dacron or chinlon is powdered. As can be seen, the aramid paper is disposed on the surface of the silicone rubber to improve the insulation, electrical and mechanical properties of the entire first insulation layer 200.
In other embodiments, the first insulating member may also be aramid paper, and the second insulating member is silicone rubber.
Specifically, referring to fig. 3, in one embodiment, the three-dimensional roll core structure 10 further includes a second insulating layer 300, and the second insulating layer 300 is coated or wrapped on the surface of the stem 110. In this manner, the stem 110 is insulated by providing the second insulating layer 300.
Further, the second insulating layer 300 includes at least one layer of a third insulating member and at least one layer of a fourth insulating member, which are stacked according to a predetermined stacking rule. The arrangement of the second insulating layer 300 may be; one layer of the third insulating member is coated or wrapped on the surface of the stem 110, and the remaining third insulating members are sequentially stacked on the one layer of the third insulating member, and then one layer of the fourth insulating member is coated or wrapped on the surface of the third insulating member, and the remaining fourth insulating members are sequentially stacked on the one layer of the fourth insulating member. Or, the third insulating member and the fourth insulating member are alternately stacked in sequence; there are many stacking ways, and the specific stacking way is set according to the needs of users.
In one embodiment, a third insulator is coated or clad on the surface of the stem 110 and a fourth insulator is coated or clad on the surface of the third insulator. Thus, the insulating effect of the third insulating member can be ensured by coating the fourth insulating member on the surface of the third insulating member. Further, when the second insulating layer 300 is disposed, the third insulating member may be disposed with an insulating member having a good compactness, so that the number of micro holes similar to the pinhole in the third insulating member having a good compactness is small or no micro holes are present, so as to reduce the probability of discharging in the micro holes of the coil or prevent the coil from discharging in the micro holes, thereby improving the insulating performance of the corner portion 130; the fourth insulating member may be an insulating member having good electrical and mechanical properties, so as to improve the insulating and mechanical properties of the first insulating layer 200, and may function as a third insulating member.
Further, the third insulating member is silicon rubber, which has good compactness and can improve the insulating performance of the corner portion 130 when the silicon rubber is used as the insulating member.
Further, the fourth insulating member is aramid paper. Based on the above description, the provision of the aramid paper on the surface of the silicone rubber can improve the insulating property, the electrical property, and the mechanical property of the entire second insulating layer 300.
In other embodiments, the third insulating member is aramid paper and the fourth insulating member may be silicone rubber.
Specifically, referring to fig. 4, in one embodiment, the three-dimensional coil core structure 10 further includes a third insulating layer 400, and the third insulating layer 400 is coated or wrapped on the surface of the yoke 1024. In this manner, the third insulating layer 400 is provided to insulate the iron yoke 1024.
Further, the third insulating layer 400 includes at least one layer of a fifth insulating member and at least one layer of a sixth insulating member, which are stacked according to a predetermined stacking rule. The third insulating layer 400 may be arranged in an array manner; one layer of the fifth insulating member is coated or wrapped on the surface of the corner iron yoke 1024, and the rest of the fifth insulating members are sequentially stacked on the one layer of the fifth insulating member, and then one layer of the sixth insulating member is coated or wrapped on the surface of the fifth insulating member, and the rest of the sixth insulating members are sequentially stacked on the one layer of the sixth insulating member. Or the fifth insulating part and the sixth insulating part are alternately stacked in sequence; there are many stacking ways, and the specific stacking way is set according to the needs of users.
In one embodiment, the fifth insulator is coated or clad on the surface of the yoke 1024 and the sixth insulator is coated or clad on the surface of the fifth insulator. Therefore, the insulation effect of the fifth insulating part can be ensured by coating the sixth insulating part on the surface of the fifth insulating part. Further, when the third insulating layer 400 is provided, the fifth insulating member may be provided with an insulating member with good compactness, so that the fifth insulating member with good compactness has fewer or no micro holes like the pinhole holes, and thus, the probability of discharging of the coil in the micro holes can be reduced or the discharging of the coil in the micro holes can be avoided, and further, the insulating performance of the corner portion 130 can be improved; the sixth insulating member may be an insulating member having good electrical and mechanical properties, so as to improve the insulating and mechanical properties of the first insulating layer 200, and simultaneously, may play a role in protecting the fifth insulating member.
Further, the fifth insulating member is silicon rubber, which has good compactness and can improve the insulating performance of the corner portion 130 when the silicon rubber is used as the insulating member.
Further, the sixth insulating member is aramid paper. Based on the above description, the provision of the aramid paper on the surface of the silicon rubber can improve the insulation performance, the electrical performance, and the mechanical performance of the entire third insulation layer 400.
In another embodiment, the fifth insulating member is aramid paper and the sixth insulating member is silicone rubber.
To improve the insulating performance of the three-dimensional roll core structure 10, please refer to fig. 5, the second insulating layer 300 is coated or wrapped on the surface of the stem 110, the first insulating layer 200 is coated or wrapped on the surface of the corner 130, and the third insulating layer 400 is coated or wrapped on the surface of the yoke 1024, where the first insulating layer 200 and the third insulating layer 400 may partially overlap.
In addition, the present application also relates to a transformer, which includes the three-dimensional wound core structure 10 in any of the above embodiments.
When the transformer is used, the first insulating layer 200 is coated or wrapped on the corner portion 130 formed between the stem 110 and the yoke 1024, so that when the distance between the coil and the yoke 1024 is reduced, the coil does not discharge electricity at the corner portion 130, and the sizes of the transformer core 100 and the coil can be reduced; further, the present application can reduce the no-load loss and the load loss of the transformer by coating or wrapping the first insulating layer 200 on the corner portion 130, compared to the conventional transformer which adopts the increase of the air distance between the core 100 and the charged portion of the coil to ensure the insulating property between the coil and the core 100.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply mean that the horizontal width of the first feature is greater than that of the second feature. A first feature "under," "below," and "beneath" a second feature may be directly under or obliquely below the second feature, or simply mean that the first feature is smaller in horizontal width than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The three-dimensional iron core rolling structure is characterized by comprising an iron core and a first insulating layer, wherein the iron core comprises a core column and an iron yoke connected with the core column, an included angle is formed between the core column and the iron yoke, a corner part is formed between the core column and the iron yoke, and the first insulating layer is coated or coated on the surface of the corner part.
2. The solid core structure of claim 1, wherein the first insulating layer comprises a first section and a second section connected to the first section, the first section is coated or wrapped on the corner portion of the core pillar, the second section is coated or wrapped on the corner portion of the core yoke, and the width of the first section on the core pillar is H1, wherein 55mm ≦ H1; the width of the second section on the iron yoke is H2, wherein 55mm is less than or equal to H2.
3. The solid core structure of claim 1, wherein the first insulating layer comprises at least one layer of first insulating member and at least one layer of second insulating member, and the first insulating member and the second insulating member are stacked according to a predetermined stacking rule.
4. The solid core-rolled structure according to claim 3, wherein the first insulating member is silicon rubber, and the second insulating member is aramid paper; or the first insulating part is aramid paper, and the second insulating part is silicon rubber.
5. The solid core structure of claim 1, further comprising a second insulating layer coated or wrapped on the surface of the core pillar.
6. The solid core structure of claim 5, wherein the second insulating layer comprises at least one third insulating member and at least one fourth insulating member, and the third insulating member and the fourth insulating member are stacked according to a predetermined stacking rule.
7. The solid core structure of claim 1, further comprising a third insulating layer coated or clad on the surface of the yoke.
8. The solid core structure of claim 7, wherein the third insulating layer comprises at least one fifth insulating member and at least one sixth insulating member, and the fifth insulating member and the sixth insulating member are stacked according to a predetermined stacking rule.
9. The solid roll core structure according to claim 8, wherein the fifth insulating member is silicone rubber, and the sixth insulating member is aramid paper; or the fifth insulating part is aramid paper, and the sixth insulating part is silicon rubber.
10. A transformer, characterized by comprising the solid roll core structure of any one of claims 1 to 9.
CN202010612602.8A 2020-06-30 2020-06-30 Three-dimensional roll iron core structure and transformer Pending CN111724972A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5987807A (en) * 1982-11-11 1984-05-21 Toshiba Corp Manufacture of continuous wound core
JP2004022649A (en) * 2002-06-13 2004-01-22 Hitachi Industrial Equipment Systems Co Ltd Iron core transformer
CN201204116Y (en) * 2008-08-28 2009-03-04 广东海鸿变压器有限公司 Solid wound core transformer core
CN204155724U (en) * 2014-10-22 2015-02-11 海鸿电气有限公司 A kind of open dry-type transformer
CN204991383U (en) * 2015-09-24 2016-01-20 上海日港置信非晶体金属有限公司 Type of making an uproar metallic glass transformer core falls
CN205080993U (en) * 2015-07-31 2016-03-09 杜邦公司 Dry transformer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5987807A (en) * 1982-11-11 1984-05-21 Toshiba Corp Manufacture of continuous wound core
JP2004022649A (en) * 2002-06-13 2004-01-22 Hitachi Industrial Equipment Systems Co Ltd Iron core transformer
CN201204116Y (en) * 2008-08-28 2009-03-04 广东海鸿变压器有限公司 Solid wound core transformer core
CN204155724U (en) * 2014-10-22 2015-02-11 海鸿电气有限公司 A kind of open dry-type transformer
CN205080993U (en) * 2015-07-31 2016-03-09 杜邦公司 Dry transformer
CN204991383U (en) * 2015-09-24 2016-01-20 上海日港置信非晶体金属有限公司 Type of making an uproar metallic glass transformer core falls

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