WO2017129072A1 - 折叠式立体双开口铁芯 - Google Patents

折叠式立体双开口铁芯 Download PDF

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Publication number
WO2017129072A1
WO2017129072A1 PCT/CN2017/072071 CN2017072071W WO2017129072A1 WO 2017129072 A1 WO2017129072 A1 WO 2017129072A1 CN 2017072071 W CN2017072071 W CN 2017072071W WO 2017129072 A1 WO2017129072 A1 WO 2017129072A1
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Prior art keywords
frame
iron core
core
group
belt group
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PCT/CN2017/072071
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English (en)
French (fr)
Inventor
齐侠
齐会南
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齐侠
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Priority claimed from CN201710013525.2A external-priority patent/CN106653303A/zh
Application filed by 齐侠 filed Critical 齐侠
Publication of WO2017129072A1 publication Critical patent/WO2017129072A1/zh

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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
    • H01F27/25—Magnetic cores made from strips or ribbons
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together

Definitions

  • the invention relates to the technical field of transformers, in particular to a folded three-dimensional double-opening iron core.
  • the iron core is an important component of the transformer.
  • the closed three-dimensional triangular-core iron core transformer has been widely used due to its three core magnetic properties, and the energy-saving effect is remarkable, however, because The core of the closed triangular core transformer is closed, so the process of assembling the coil in the process of manufacturing the transformer is complicated, the production efficiency is low, the quality is difficult to control, and the product maintenance is difficult, which seriously affects its development.
  • the advent of a detachable three-dimensional open-width triangular core transformer solves the above problems, but there are still some deficiencies, such as: the position of the open seam can only be concentrated on the upper end of the iron core. It is easy to cause looseness, displacement and deformation, and has poor resistance to sudden short circuit. It is not convenient to insert the iron yoke, and the insertion efficiency is low.
  • the object of the present invention is to provide a folded three-dimensional double-opening iron core to solve the problems of poor mechanical strength, poor resistance to sudden short circuit, and low insertion efficiency of the existing three-dimensional transformer core.
  • the technical solution provided by the present invention is: a folded three-dimensional double-opening iron core, which is formed by three independent single-frame iron cores of the same size and structure, which are assembled at an angle of 120° at a central angle, and the single frame is formed.
  • the iron core comprises a single-frame iron core column, a single-frame iron core upper yoke, a single-frame iron core lower yoke and a bending inclined surface
  • the single-frame iron core comprises an inner layer belt group, a middle layer belt group and an outer layer belt
  • the group is stacked in sequence
  • the middle layer belt group comprises a middle first belt group and a middle second belt group stacked on the outer side of the middle first belt group
  • the outer layer belt group includes an outer layer first material a belt set, an outer second belt set stacked on the outer side of the outer first belt set, and an outer third belt set superposed on the outer side of the outer second belt set
  • the layer material belt group, the middle layer first material belt group and the outer layer first material belt group are respectively formed by stacking a single ring material frame with a plurality of openings symmetrically arranged at the upper end of the single frame iron core column, and the middle layer second material
  • the belt group and the outer second belt group are respectively symmetrically arranged by
  • the frames are stacked, wherein the distance between the opening on each single-ring strip frame and the bending angle located on the same side of the opening is ⁇ 5 mm, forming a single circle of the third tape group of the outer layer
  • the openings on the strip frame are all located in a cylindrical space extending upward along the core of the transformer core, wherein the transformer core core is assembled by a single-frame iron core.
  • the middle layer belt group and/or the outer layer material belt group constituting the single-frame iron core are a plurality of groups, and the middle layer belt groups of each group are sequentially stacked, and the outer layer belt groups of each group are sequentially stacked.
  • the single-ring strip frame constituting the inner layer strip set, the middle layer strip set and the outer layer strip set is correspondingly provided with eight 135 degree bend angles.
  • the single-ring strip frame constituting the inner layer strip set, the middle layer strip set and the outer layer strip set is correspondingly provided with twelve 150 degree bend angles.
  • the middle second tape set and the outer second tape set respectively comprise a plurality of single ring strip frames symmetrically disposed on the first bending slope and a plurality of stacked symmetrically disposed at the first fold a single-ring strip frame outside the single-ring strip frame on the curved slope and symmetrically disposed on the second bend slope surface, wherein the first bend slope is located on the single-frame iron core pillar and the single-frame iron core upper yoke The first end is connected to the single-frame iron core, and the two ends of the second bending inclined surface are respectively connected with the first bending inclined surface and the single-frame iron core upper yoke.
  • the opening positions of the single-ring strips constituting the inner layer strip group, the middle layer strip group and the outer layer strip group are arranged in a staggered arrangement.
  • the cross section of the transformer core stud is oblong or round-like inscribed polygon or stepped or rectangular or circular.
  • the opening on the single-ring strip frame constituting the inner layer strip set, the middle layer strip set and the outer layer strip set is the same as the bend angle on the single-ring strip frame and closest to the opening
  • the distance is ⁇ 5mm, so that the length is formed at the opening of the single-ring strip frame ⁇ 5mm limit part, the limit part can play the upper and lower or / and left and right direction of the single ring frame on the inner side of the limit, specifically: when the core is inserted, the outer layer is composed
  • the outer third belt set of the belt group can prevent the second belt group from being swayed on the inner side, and the second belt group on the outer layer can prevent the first belt group on the inner side from swaying
  • the effect of locking in the outer strip group is achieved, and the middle second strip group constituting the middle strip group can prevent the turbulence of the middle first strip group located on the inner side thereof, thereby realizing the locking in the middle strip group
  • the outer strip group as a whole can also prevent the turbulence
  • the iron core increases one opening of the existing iron core to three openings, and the increased opening portions are exposed outside the coil, which is obviously visible, which facilitates the insertion of the iron core and improves the efficiency of the iron core insertion.
  • the artificial production cost is reduced, and the iron core after the opening is increased, the vibration is reduced by the dispersion of the opening position, and the noise is improved, thereby further improving the short-circuit resistance of the iron core;
  • the openings on the single-ring strip frame forming the outer third strip group are located in the cylindrical space extending upward along the core of the transformer core, which facilitates the assembly of the coil, so that the coil is placed from top to bottom. The outside of the transformer core is not stuck during the process.
  • FIG. 1 is a schematic structural view of an embodiment of a folded three-dimensional double-open core according to the present invention
  • FIG. 2 is a schematic structural view of another embodiment of a folded three-dimensional double-opening iron core according to the present invention.
  • FIG. 3 is a schematic structural view of an embodiment of a single-frame iron core
  • FIG. 4 is a schematic structural view of another embodiment of a single-frame iron core
  • Figure 5 is a schematic structural view of an embodiment of an inner layer strip
  • FIG. 6 is a schematic structural view of another embodiment of an inner layer strip group
  • Figure 7 is a schematic structural view of an embodiment of a middle layer tape set
  • Figure 8 is a schematic structural view of another embodiment of a middle layer tape set
  • Figure 9 is a schematic structural view of an embodiment of an outer layer strip
  • Figure 10 is a schematic view showing the structure of another embodiment of the outer layer strip
  • Figure 11 is a cross-sectional view of a transformer core core in an oblong shape
  • Figure 12 is a cross-sectional view of a transformer core stud having a circle-inscribed polygon
  • Figure 13 is a cross-sectional view of a stepped transformer core stud
  • Figure 14 is a cross-sectional view of a rectangular core of a transformer
  • Figure 15 is a cross-sectional view of a transformer core core in a circular shape.
  • the folded three-dimensional double-opening iron core provided by the present invention is formed by three independent single-frame iron cores 1 of the same size and structure, which are assembled at an angle of 120° at a central angle, as shown in FIG. 3 .
  • the single-frame iron core 1 includes a single-frame iron core stud 11, a single-frame iron core upper yoke 12, a single-frame iron core lower yoke 13 and a bent inclined surface 14, and the single-frame iron core 1
  • the inner layer belt group 3, the middle layer belt group 4 and the outer layer belt group 5 are sequentially stacked, as shown in FIG. 7 and FIG. 8, the middle layer belt group 4 includes the middle layer first belt group 41 and the stack.
  • the openings are symmetrically arranged on the upper end of the single-frame iron core stud 11 and are stacked in a single ring frame.
  • the second tape set 42 (shown in Figures 7 and 8) and the outer second tape set 52 (shown in Figures 9 and 10) are symmetrically disposed from the plurality of openings in the single frame core studs 11 and
  • the single-ring strip frame on the bent bevel 14 between the frame core upper yokes 12 is stacked, and the outer third tape set 53 (shown in Figures 9 and 10) is symmetrically arranged by a plurality of openings.
  • On the frame core The single-ring strips at both ends of the yoke 12 are stacked, wherein the distance between the opening on each single-ring strip frame and the bending angle located on the same side of the yoke is ⁇ 5 mm, as shown in the figure 1 and FIG.
  • the openings on the single-ring strip frame constituting the outer third belt group 53 are all located in the cylindrical space extending upward along the transformer core post 6, as shown in FIG. 3 and FIG.
  • the openings on the single-ring material frame are located in the range of the A, B, and C regions, wherein the area A represents an openable area on the single-frame iron core, which is located at the upper end of the single-frame iron core.
  • the area B represents the openable area on the bending slope
  • the distance from the bending angle of the area is ⁇ 5mm
  • the open area of the upper yoke of the single-frame iron core of the area C is located along the edge
  • the distance between the bent core and the bending angle of the transformer core is upwardly ⁇ 5 mm
  • the transformer core 6 is formed by combining single-frame iron cores 11 , wherein FIG. 1 to FIG.
  • Each of the rectangular frames shown in Figure 10 represents a set of single-turn strip frames, and does not represent only a single-turn strip frame.
  • the upper and lower or / and left and right direction of the limit action specifically: when the core is inserted, the outer third belt set forming the outer layer of the strip can prevent the outer second belt set on the inner side Tilting, the outer second belt set can prevent the first belt group on the inner side from swaying, and achieve the effect of locking in the outer belt group, and the middle second belt forming the middle belt group
  • the group can prevent the turbulence of the first layer of the middle layer located on the inner side thereof, thereby achieving the purpose of locking in the middle layer belt group, and
  • the purpose of locking between the outer belt group, the middle belt group and the inner belt group is achieved, thereby solving the problem that the iron core which is only open at the upper end of the core column is easy to be longitudinally loosened and moved under the action of a strong electromagnetic field. Position, deformation, resistance to sudden short-circuit capability, etc.
  • the locking effect in the belt group and the belt group greatly improves the mechanical strength of the iron core.
  • the iron core will open an opening of the existing iron core. The opening is increased to three openings, and the increased opening portions are exposed outside the coil, which is obvious, which facilitates the insertion of the iron core, improves the efficiency of the core insertion, reduces the labor cost, and increases the opening of the iron core through the opening.
  • the position is dispersed, the vibration is reduced, and the noise is improved.
  • the core is resistant to sudden short-circuiting, and at the same time, the openings on the single-ring strip frame forming the outer third strip group are located in the cylindrical space extending upward along the core of the transformer core, which facilitates the coil. The suit prevents the coil from getting stuck in the process of being placed on the outside of the transformer core from top to bottom.
  • the middle-layer material group 4 of the single-frame iron core 1 and / or the outer strip group 5 is a plurality of groups, and the middle strip groups 4 in each group are sequentially stacked, and the outer strip groups 5 of each group are sequentially stacked.
  • FIG. 1 As shown in FIG. 1, FIG. 3, FIG. 5, FIG. 7 and FIG. 9, eight single-loop strips constituting the inner layer strip group 3, the middle layer strip group 4 and the outer layer strip group 5 are arranged correspondingly with eight A bending angle of 135 degrees, that is, four bending bevels are arranged on each single ring material frame.
  • FIG. 2 As shown in FIG. 2, FIG. 4, FIG. 6, FIG. 8 and FIG. 10, 12 single-row strip frames constituting the inner layer strip group 3, the middle layer strip group 4 and the outer layer strip group 5 are correspondingly arranged.
  • a bend angle of 150 degrees, that is, eight bend bevels are placed on each single-ring strip frame.
  • the middle second tape group 42 and the outer second tape group 52 respectively include a plurality of openings.
  • a single-ring strip frame symmetrically disposed on the first bending slope and a plurality of single-ring strip frames stacked on the first bending slope symmetrically on the outer side of the opening and symmetrically disposed on the second bending slope a single-ring material frame, wherein the first bending slope is located between the single-frame iron core stud 11 and the single-frame iron core upper yoke 12, and one end is connected with the single-frame iron core stud 11 and the second bent inclined surface is two The ends are respectively connected to the first bending slope and the single-frame core upper yoke 12.
  • the opening positions of the single-ring strips constituting the inner layer strip group 3, the middle layer strip group 4 and the outer layer strip group 5 are all stepped.
  • the stacking is arranged in such a way that the iron core is minimized due to the opening structure, and the mechanical strength of the core is strengthened and improved.
  • the cross section of the transformer core stud 6 is oblong (as shown in FIG. 11) or a circle-inscribed polygon (as shown in FIG. 12) or a stepped type (as shown in FIG. 13) or a rectangle. (as shown in Figure 14) or a circle like this (as shown in Figure 15).

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  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

本发明公开了一种折叠式立体双开口铁芯，由三个独立且大小结构均相同的单框铁芯以中心角120°的角度拼合而成，所述单框铁芯包括内层料带组、中层料带组和外层料带组，组成内层料带组的单圈料带框的开口对称设置在单框铁芯芯柱的上端，组成中层料带组的单圈料带框的开口对称设置在单框铁芯芯柱的上端和单框铁芯芯柱与单框铁芯上轭之间的折弯斜面上，组成外层料带组的单圈料带框的开口对称设置在单框铁芯芯柱的上端、单框铁芯芯柱与单框铁芯上轭之间的折弯斜面上和单框铁芯上轭的两端，每个单圈料带框上的开口与离其最近的折弯角的距离≥5mm。本发明机械强度高、抗突发短路能力强、插装效率高。

Description

折叠式立体双开口铁芯 技术领域
本发明涉及变压器技术领域，特别涉及折叠式立体双开口铁芯。
背景技术
铁芯是组成变压器的重要部件，近年来，随着国家对节能产品的推广，闭口立体三角形卷铁芯变压器因其三个铁芯磁性能完全一致，节能效果显著而被广泛应用，然而，因为闭口三角型铁芯变压器的铁芯为闭口，所以在制造变压器的过程中套装线圈工艺复杂，生产效率低，质量不易控制，产品维修困难，严重影响了它的发展。目前，一种可拆装的折叠式立体开口三角形铁芯变压器的问世，解决了上述问题，但也仍存在一定的不足，如：开口接缝位置只能集中设置在铁芯芯柱的上端，极易造成松动、移位和变形，抗突发短路能力差，不方便插装上铁轭，插装效率低。
因此，如何对现有的折叠式立体双开口铁芯进行结构上的改进，以提高其机械强度、抗突发短路能力和插装效率，成为人们亟待解决的问题。
发明内容
鉴于此，本发明的目的在于提供一种折叠式立体双开口铁芯，以解决现有立体变压器铁芯机械强度差、抗突发短路能力差、插装效率低等问题。
为解决上述问题，本发明提供的技术方案是：折叠式立体双开口铁芯，由三个独立且大小结构均相同的单框铁芯以中心角120°的角度拼合而成，所述单框铁芯包括单框铁芯芯柱、单框铁芯上轭、单框铁芯下轭和折弯斜面，所述单框铁芯由内层料带组、中层料带组和外层料带组依次叠装而成，中层料带组包括中层第一料带组和叠装在所述中层第一料带组外侧的中层第二料带组，外层料带组包括外层第一料带组、叠装在所述外层第一料带组外侧的外层第二料带组和叠装在所述外层第二料带组外侧的外层第三料带组，其中，内层料带组、中层第一料带组和外层第一料带组分别由多个开口对称设置在单框铁芯芯柱的上端的单圈料带框叠装而成，中层第二料带组和外层第二料带组分别由多个开口对称设置在单框铁芯芯柱与单 框铁芯上轭之间的折弯斜面上的单圈料带框叠装而成，外层第三料带组由多个开口对称设置在单框铁芯上轭的两端的单圈料带框叠装而成，其中，位于每个单圈料带框上的开口与位于其上且离所述开口最近的折弯角的距离均≥5mm，组成外层第三料带组的单圈料带框上的开口均位于沿变压器铁芯芯柱向上延伸的柱形空间内，其中，所述变压器铁芯芯柱由单框铁芯芯柱拼合而成。
优选，组成单框铁芯的中层料带组和/或外层料带组为多组，且各组中层料带组依次叠装，各组外层料带组依次叠装。
进一步优选，组成内层料带组、中层料带组和外层料带组的单圈料带框上对应设置有8个135度的折弯角。
进一步优选，组成内层料带组、中层料带组和外层料带组的单圈料带框上对应设置有12个150度的折弯角。
进一步优选，中层第二料带组和外层第二料带组分别包括多个开口对称设置在第一折弯斜面上的单圈料带框和多个叠装于开口对称设置在第一折弯斜面上的单圈料带框外侧且开口对称设置在第二折弯斜面上的单圈料带框，其中，第一折弯斜面位于单框铁芯芯柱与单框铁芯上轭之间且一端与单框铁芯芯柱连接，第二折弯斜面的两端分别与第一折弯斜面和单框铁芯上轭连接。
进一步优选，组成内层料带组、中层料带组和外层料带组的单圈料带框的开口对接位置均按阶梯式隔层错位排列。
进一步优选，变压器铁芯芯柱的截面呈长圆形或类圆内接多边形或台阶型或矩形或类圆形。
本发明提供的折叠式立体双开口铁芯的有益效果如下：
1、因为组成内层料带组、中层料带组和外层料带组的单圈料带框上的开口与位于所述单圈料带框上且离所述开口最近的折弯角的距离≥5mm，使得在单圈料带框的开口处均形成长度≥ 5mm的限位部，该限位部能起到对位于其内侧的单圈料带框的上下或/和左右方向的限位作用，具体的：当铁芯插装完成后，组成外层料带组的外层第三料带组能够防止位于其内侧的外层第二料带组的窜动，外层第二料带组能够防止位于其内侧的外层第一料带组的窜动，达到了外层料带组内锁定的效果，组成中层料带组的中层第二料带组能够防止位于其内侧的中层第一料带组的窜动，实现了中层料带组内的锁定的目的，同时，外层料带组作为一个整体还能够防止位于其内侧的中层料带组的窜动，中层料带组还能够防止位于其内侧的内层料带组的窜动，实现了外层料带组、中层料带组和内层料带组之间锁定的目的，从而解决了仅在芯柱上端开口的铁芯容易在强大的电磁场的作用下产生纵向松动、移位、变形，抗突发短路能力差等问题，同时，料带组间及料带组内的锁定作用大大提高了铁芯的机械强度；
2、该铁芯将现有铁芯的一处开口增加至三处开口，且增加的开口部分均暴露在线圈外，明显可见，方便了铁芯的插装，提高了铁芯插装效率，降低人工生产成本，增加开口后的铁芯通过将开口位置分散，使震动削减，对噪声有所改善，进一步提高了铁芯的抗突发短路能力；
3、组成外层第三料带组的单圈料带框上的开口均位于沿变压器铁芯芯柱向上延伸的柱形空间内，方便了线圈的套装，使得线圈在由上至下套装在变压器铁芯芯柱外侧的过程中不会被卡住。
附图说明
下面结合附图及实施方式对本发明作进一步详细的说明：
图1为本发明折叠式立体双开口铁芯一实施例的结构示意图；
图2为本发明折叠式立体双开口铁芯另一实施例的结构示意图；
图3为单框铁芯一实施例的结构示意图；
图4为单框铁芯另一实施例的结构示意图；
图5为内层料带组一实施例的结构示意图；
图6为内层料带组另一实施例的结构示意图；
图7为中层料带组一实施例的结构示意图；
图8为中层料带组另一实施例的结构示意图；
图9为外层料带组一实施例的结构示意图；
图10为外层料带组另一实施例的结构示意图；
图11为呈长圆形的变压器铁芯芯柱的截面图；
图12为呈类圆内接多边形的变压器铁芯芯柱的截面图；
图13为呈台阶形的变压器铁芯芯柱的截面图；
图14为呈矩形的变压器铁芯芯柱的截面图；
图15为呈类圆形的变压器铁芯芯柱的截面图。
具体实施方式
下面将结合具体的实施方案对本发明进行进一步的解释，但并不局限本发明。
如图1、图2所示，本发明提供的折叠式立体双开口铁芯，由三个独立且大小结构均相同的单框铁芯1以中心角120°的角度拼合而成，如图3、图4所示，所述单框铁芯1包括单框铁芯芯柱11、单框铁芯上轭12、单框铁芯下轭13和折弯斜面14，所述单框铁芯1由内层料带组3、中层料带组4和外层料带组5依次叠装而成，如图7和图8所示，中层料带组4包括中层第一料带组41和叠装在所述中层第一料带组41外侧的中层第二料带组42，如图9和图10所示，外层料带组5包括外层第一料带组51、叠装在所述外层第一料带组51外侧的外层第二料带组52和叠装在所述外层第二料带组52外侧的外层第三料带组53，其中，内层料带组3(图5和图6所示)、中层第一料带组41(图7和图8所示)和外层第一料带组51(图9和图10所示)分别由多个开口对称设置在单框铁芯芯柱11的上端的单圈料带框叠装而成，中层第二料带组42(图7和图8所示)和外层第二料带组52(图9和图10所示)分别由多个开口对称设置在单框铁芯芯柱11与单框铁芯上轭12之间的折弯斜面14上的单圈料带框叠装而成，外层第三料带组53(图9和图10所示)由多个开口对称设置在单框铁芯上 轭12的两端的单圈料带框叠装而成，其中，位于每个单圈料带框上的开口与位于其上且离所述开口最近的折弯角的距离均≥5mm，如图1和图2所示，组成外层第三料带组53的单圈料带框上的开口均位于沿变压器铁芯芯柱6向上延伸的柱型空间内，如图3、图4所示，单圈料带框上的开口均位于A、B、C区域所在的范围内，其中，区域A代表单框铁芯芯柱上的可开口区域，该区域位于单框铁芯芯柱的上端且距折弯角的距离≥5mm，区域B代表折弯斜面上的可开口区域，该区域距折弯角的距离≥5mm，区域C单框铁芯上轭的可开口区域，该区域位于沿变压器铁芯芯柱向上延伸的柱形空间内且距折弯角的距离≥5mm，其中，所述变压器铁芯芯柱6由单框铁芯芯柱11拼合而成，其中，图1至图10中所示的每一个类矩形框均代表一组单圈料带框，而并不是仅代表一个单圈料带框。
该折叠式立体双开口铁芯，因为组成内层料带组、中层料带组和外层料带组的单圈料带框上的开口与位于所述单圈料带框上且距离所述开口最近的折弯角的距离>＝5mm，使得在单圈料带框的开口处均形成长度≥5mm的限位部，该限位部能起到对位于其内侧的单圈料带框的上下或/和左右方向的限位作用，具体的：当铁芯插装完成后，组成外层料带组的外层第三料带组能够防止位于其内侧的外层第二料带组的窜动，外层第二料带组能够防止位于其内侧的外层第一料带组的窜动，达到了外层料带组内锁定的效果，组成中层料带组的中层第二料带组能够防止位于其内侧的中层第一料带组的窜动，实现了中层料带组内的锁定的目的，同时，外层料带组作为一个整体还能够防止位于其内侧的中层料带组的窜动，中层料带组还能够防止位于其内侧的内层料带组的窜动，实现了外层料带组、中层料带组和内层料带组之间锁定的目的，从而解决了仅在芯柱上端开口的铁芯容易在强大的电磁场的作用下产生纵向松动、移位、变形，抗突发短路能力差等问题，同时，料带组间及料带组内的锁定作用大大提高了铁芯的机械强度，另外，该铁芯将现有铁芯的一处开口增加至三处开口，且增加的开口部分均暴露在线圈外，明显可见，方便了铁芯的插装，提高了铁芯插装效率，降低人工生产成本，增加开口后的铁芯通过将开口位置分散，使震动削减，对噪声有所改善，进一步提 高了铁芯的抗突发短路能力，同时，组成外层第三料带组的单圈料带框上的开口均位于沿变压器铁芯芯柱向上延伸的柱形空间内，方便了线圈的套装，使得线圈在由上至下套装在变压器铁芯芯柱外侧的过程中不会被卡住。
随着单圈料带框个数的不断增加，为更好的实现料带组间和料带组内锁定的效果，作为技术方案的改进，组成单框铁芯1的中层料带组4和/或外层料带组5为多组，且各组中层料带组4依次叠装，各组外层料带组5依次叠装。
如图1、图3、图5、图7和图9所示，组成内层料带组3、中层料带组4和外层料带组5的单圈料带框上对应设置有8个135度的折弯角，即：每个单圈料带框上设置四个折弯斜面。
如图2、图4、图6、图8和图10所示，组成内层料带组3、中层料带组4和外层料带组5的单圈料带框上对应设置有12个150度的折弯角，即：每个单圈料带框上设置八个折弯斜面。
当组成变压器铁芯的单圈料带框上设置八个折弯斜面时，如图8和图10所示，中层第二料带组42和外层第二料带组52分别包括多个开口对称设置在第一折弯斜面上的单圈料带框和多个叠装于开口对称设置在第一折弯斜面上的单圈料带框外侧且开口对称设置在第二折弯斜面上的单圈料带框，其中，第一折弯斜面位于单框铁芯芯柱11与单框铁芯上轭12之间且一端与单框铁芯芯柱11连接，第二折弯斜面的两端分别与第一折弯斜面和单框铁芯上轭12连接。
作为技术方案的改进，如图5至图10所示，组成内层料带组3、中层料带组4和外层料带组5的单圈料带框的开口对接位置均按阶梯式隔层错位排列，从而，使该铁芯由于开口结构所产生的铁损降至最低，使铁芯的机械强度得到了加强和提高。
作为技术方案的改进，变压器铁芯芯柱6的截面呈长圆形(如图11所示)或类圆内接多边形(如图12所示)或台阶型(如图13所示)或矩形(如图14所示)或类圆形(如图15所示)。
本发明的具体实施方式是按照递进的方式进行撰写的，着重强调各个实施方案的不同之处，其相似部分可以相互参见。
上面结合附图对本发明的实施方式做了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下作出各种变化。

Claims (7)

  1. 折叠式立体双开口铁芯，由三个独立且大小结构均相同的单框铁芯(1)以中心角120°的角度拼合而成，所述单框铁芯(1)包括单框铁芯芯柱(11)、单框铁芯上轭(12)、单框铁芯下轭(13)和折弯斜面(14)，其特征在于，所述单框铁芯(1)由内层料带组(3)、中层料带组(4)和外层料带组(5)依次叠装而成，中层料带组(4)包括中层第一料带组(41)和叠装在所述中层第一料带组(41)外侧的中层第二料带组(42)，外层料带组(5)包括外层第一料带组(51)、叠装在所述外层第一料带组(51)外侧的外层第二料带组(52)和叠装在所述外层第二料带组(52)外侧的外层第三料带组(53)，其中，内层料带组(3)、中层第一料带组(41)和外层第一料带组(51)分别由多个开口对称设置在单框铁芯芯柱(11)的上端的单圈料带框叠装而成，中层第二料带组(42)和外层第二料带组(52)分别由多个开口对称设置在单框铁芯芯柱(11)与单框铁芯上轭(12)之间的折弯斜面(14)上的单圈料带框叠装而成，外层第三料带组(53)由多个开口对称设置在单框铁芯上轭(12)的两端的单圈料带框叠装而成，其中，位于每个单圈料带框上的开口与位于其上且离所述开口最近的折弯角的距离均≥5mm，组成外层第三料带组(53)的单圈料带框上的开口均位于沿变压器铁芯芯柱(6)向上延伸的柱形空间内，其中，所述变压器铁芯芯柱(6)由单框铁芯芯柱(11)拼合而成。
  2. 按照权利要求1所述的折叠式立体双开口铁芯，其特征在于：组成单框铁芯(1)的中层料带组(4)和/或外层料带组(5)为多组，且各组中层料带组(4)依次叠装，各组外层料带组(5)依次叠装。
  3. 按照权利要求1所述的折叠式立体双开口铁芯，其特征在于：组成内层料带组(3)、中层料带组(4)和外层料带组(5)的单圈料带框上对应设置有8个135度的折弯角。
  4. 按照权利要求1所述的折叠式立体双开口铁芯，其特征在于：组成内层料带组(3)、中层料带组(4)和外层料带组(5)的单圈料带框上对应设置有12个150度的折弯角。
  5. 按照权利要求4所述的折叠式立体双开口铁芯，其特征在于：中层第二料带组(42)和外层第二料带组(52)分别包括多个开口对称设置在第一折弯斜面上的单圈料带框和多个叠装于开口对称设置在第一折弯斜面上的单圈料带框外侧且开口对称设置在第二折弯斜面上的单圈料带框，其中，第一折弯斜面位于单框铁芯芯柱(11)与单框铁芯上轭(12)之间且一端与单框铁芯芯柱(11)连接，第二折弯斜面的两端分别与第一折弯斜面和单框铁芯上轭(12)连接。
  6. 按照权利要求1所述的折叠式立体双开口铁芯，其特征在于：组成内层料带组(3)、中层料带组(4)和外层料带组(5)的单圈料带框的开口对接位置均按阶梯式隔层错位排列。
  7. 按照权利要求1至6中任一项所述的折叠式立体双开口铁芯，其特征在于：变压器铁芯芯柱(6)的截面呈长圆形或类圆内接多边形或台阶型或矩形或类圆形。
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