Winding assembly and winding mechanism

Abstract

The utility model relates to a winding assembly and a winding mechanism. The winding assembly comprises an iron core, a sheath, a first insulating layer, a second insulating layer and a coil, the sheath is arranged on the iron core, the first insulating layer is arranged on one side of the iron core, the first insulating layer is connected with a first end plate, a second end plate, a top plate and a bottom plate of the sheath, and the thickness of the first insulating layer is smaller than that of the top plate; the second insulating layer is arranged on the other side of the iron core and connected with the first end plate, the second end plate, the top plate and the bottom plate of the sheath, and the thickness of the second insulating layer is smaller than that of the top plate; the coil is arranged on the sheath. According to the winding assembly, the sheath, the first insulating layer and the second insulating layer are arranged on the iron core, the thickness of the first insulating layer and the thickness of the second insulating layer are both smaller than the thickness of the top plate of the sheath, so that the coil can be more compact during winding, meanwhile, the total length of the coil is reduced, and the overall size and weight of the current transformer are reduced.

Description

Technical Field

[0001] The present application relates to the field of current detection, and in particular to a winding assembly and a winding mechanism. Background Art

[0002] In power systems, current transformers (CTs) are widely used for current measurement and monitoring in distribution systems. The winding assembly of a CT consists of a coil and an iron core, with the coil wound around the core. To improve the coil's insulation and protect it from mechanical damage, an insulating layer is typically applied directly or indirectly to the core surface. However, conventional insulation layer designs often utilize thicker insulating materials, which not only takes up additional space but also increases the overall coil length and the overall size of the CT. This, in turn, limits the use of CTs in compact or confined spaces. Utility Model Content

[0003] Based on the above problems, the present application provides a winding assembly and a winding mechanism to reduce the winding workload and manufacturing cost of the winding assembly.

[0004] In a first aspect, the present application provides a winding assembly, comprising:

[0005] Iron core;

[0006] Sheath, including:

[0007] The first end plate is provided with a first through hole;

[0008] A second end plate is provided with a second through hole, and the iron core passes through the first through hole and the second through hole respectively;

[0009] a top plate, one end of which is connected to the first end plate, and the other end of which is connected to the second end plate;

[0010] a bottom plate, one end of which is connected to the first end plate, and the other end of which is connected to the second end plate;

[0011] a first insulating layer, disposed on one side of the iron core, the first insulating layer respectively connecting the first end plate, the second end plate, the top plate, and the bottom plate, and a thickness of the first insulating layer being less than a thickness of the top plate;

[0012] a second insulating layer, disposed on the other side of the iron core, the second insulating layer respectively connecting the first end plate, the second end plate, the top plate, and the bottom plate, and a thickness of the second insulating layer being less than a thickness of the top plate;

[0013] The coil is arranged on the sheath.

[0014] According to some embodiments of the present application, the first insulating layer and the second insulating layer are respectively bonded to the iron core.

[0015] According to some embodiments of the present application, the first insulating layer and the second insulating layer are both insulating films, and the insulating films are connected to the sheath.

[0016] According to some embodiments of the present application, the thickness of the insulating film is 0.05 to 0.2 mm.

[0017] According to some embodiments of the present application, the first end plate includes:

[0018] A first sub-plate is provided with a first groove;

[0019] A second sub-plate is provided with a second groove, the first sub-plate abuts against the second sub-plate, and the first groove and the second groove form the first through hole;

[0020] The second end plate comprises:

[0021] A third sub-board is provided with a third groove, and the top board is connected to the first sub-board and the third sub-board respectively;

[0022] The fourth sub-board is provided with a fourth groove. The bottom plate is respectively connected to the second sub-board and the fourth sub-board. The third sub-board abuts against the fourth sub-board. The third groove and the fourth groove form the second through hole.

[0023] According to some embodiments of the present application, the coil abuts against the first end plate and the second end plate respectively.

[0024] According to some embodiments of the present application, the sheath further includes a first positioning structure;

[0025] The iron core includes a second positioning structure, and the second positioning structure is adapted to the first positioning structure.

[0026] According to some embodiments of the present application, a side wall of the second end plate is provided with a wire clamping slot, and the wire clamping slot is used to clamp the wire.

[0027] According to some embodiments of the present application, the core includes:

[0028] a plurality of first chips;

[0029] A plurality of second chips are stacked alternately with the first chips.

[0030] In a second aspect, the present application provides a winding mechanism, comprising:

[0031] a first winding assembly comprising the winding assembly described above;

[0032] The second winding assembly includes the winding assembly described above, wherein the iron core of the second winding assembly abuts against the iron core of the first winding assembly.

[0033] The winding assembly of the present application comprises a sheath, a first insulating layer, and a second insulating layer disposed on the iron core. The thickness of the first and second insulating layers is less than that of the sheath top plate, enabling a more compact coil during winding and reducing the total length of the coil, thereby reducing the overall volume and weight of the current transformer. Furthermore, the miniaturized current transformer offers greater flexibility during installation and use, making it suitable for a variety of compact installation environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without exceeding the scope of protection required by this application.

[0035] Figure 1 Schematic diagram of a casing for a winding assembly according to an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of a winding assembly according to an embodiment of the present application;

[0037] Figure 3 is a schematic diagram of a winding assembly without a coil according to an embodiment of the present application;

[0038] Figure 4 is a schematic diagram of a sheath according to an embodiment of the present application;

[0039] Figure 5 is an exploded view of the sheath according to an embodiment of the present application;

[0040] Figure 6 is a schematic diagram of the positioning structure of an embodiment of the present application;

[0041] Figure 7 is a schematic diagram of an iron core according to an embodiment of the present application;

[0042] Figure 8 It is a schematic diagram of the winding mechanism of an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following is a clear and complete description of the technical solution of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts are within the scope of protection of this application.

[0044] like Figure 1 As shown, the current transformer includes a housing 10 and a winding assembly 100, and the winding assembly 100 is arranged in the cavity of the housing 10. Figure 2 and Figure 3 As shown, the winding assembly 100 includes: an iron core 1 , a sheath 2 , a first insulating layer 3 , a second insulating layer 4 and a coil 5 .

[0045] like Figure 4 As shown, the sheath 2 includes: a first end plate 21, a second end plate 22, a top plate 23 and a bottom plate 24. The first end plate 21 is provided with a first through hole 211, and the second end plate 22 is provided with a second through hole 221. One end of the top plate 23 is connected to the side wall of the first end plate 21, and the other end of the top plate 23 is connected to the side wall of the second end plate 22. The bottom surface of the top plate 23 is flush with the top hole wall of the first through hole 211 and the top hole wall of the second through hole 221. One end of the bottom plate 24 is connected to the side wall of the first end plate 21, and the other end of the bottom plate 24 is connected to the side wall of the second end plate 22, and the top surface of the bottom plate 24 is flush with the bottom hole wall of the first through hole 211 and the bottom hole wall of the second through hole 221.

[0046] The first through hole 211 and the second through hole 221 are both adapted to the iron core 1, and the iron core 1 passes through the first through hole 211 and the second through hole 221, respectively. The shapes of the top plate 23 and the bottom plate 24 are adapted to the shape of the iron core 1. For example, if the iron core 1 is roughly semicircular, the top plate 23 and the bottom plate 24 are both in the shape of a minor arc ring. The top plate 23 covers a portion of the top surface of the iron core 1, and the bottom plate 24 covers a portion of the bottom surface of the iron core 1. Openings are formed on both the inner and outer sides of the sheath 2. Optionally, the thickness of the top plate 23 is the same as the thickness of the bottom plate 24.

[0047] The first insulating layer 3 is provided on the inner side of the core 1. The first insulating layer 3 is connected to the first end plate 21, the second end plate 22, the top plate 23 and the bottom plate 24 respectively. The first insulating layer 3 closes the inner opening of the sheath 2. The thickness of the first insulating layer 3 is less than that of the top plate 23. Figure 3 As shown, the thickness of the top plate 23 is the Z-direction dimension of the top plate 23 , and the thickness of the first insulating layer 3 is the X-direction dimension of the first insulating layer 3 . Figure 3 The X direction, Y direction and Z direction are perpendicular to each other.

[0048] The second insulating layer 4 is disposed outside the core 1 and connects the first end plate 21, the second end plate 22, the top plate 23, and the bottom plate 24. The second insulating layer 4 closes the outer opening of the sheath 2. The thickness of the second insulating layer 4 is less than that of the top plate 23. The thickness of the second insulating layer 4 is equal to the X-direction dimension of the second insulating layer 4.

[0049] The sheath 2, first insulating layer 3, and second insulating layer 4 are all made of insulating materials. The coil 5 is formed by winding enameled wire around the sheath 2. The first insulating layer 3 insulates the inner wall of the core 1 from the coil 5, while the second insulating layer 4 insulates the outer wall of the core 1 from the coil 5.

[0050] In this embodiment, the core 1 and coil 5 are insulated by the sheath 2, the first insulating layer 3, and the second insulating layer 4. The thickness of the first insulating layer 3 and the second insulating layer 4 are both less than that of the top plate 23, making the coil more compact during winding and reducing the total length of the coil, thereby reducing the overall volume and weight of the current transformer. Furthermore, the miniaturized current transformer offers greater flexibility during installation and use, making it suitable for a variety of compact installation environments.

[0051] In some embodiments, the first insulating layer 3 and the second insulating layer 4 are respectively bonded to the iron core 1 to more firmly fix the first insulating layer 3 and the second insulating layer 4 .

[0052] In some embodiments, both the first insulating layer 3 and the second insulating layer 4 are insulating films, for example, made of polyimide (PI). The insulating film of the first insulating layer 3 is disposed on the inner side of the jacket 2 and is respectively connected to the first end plate 21, the second end plate 22, the top plate 23, and the bottom plate 24. The insulating film of the second insulating layer 4 is disposed on the outer side of the jacket 2 and is respectively connected to the first end plate 21, the second end plate 22, the top plate 23, and the bottom plate 24.

[0053] In some embodiments, the thickness of the insulating film is 0.05-0.2 mm, and the thickness of the top plate 23 and the thickness of the bottom plate 24 are both 0.6-0.8 mm.

[0054] like Figure 5 As shown, the first end plate 21 includes a first sub-plate 212 and a second sub-plate 213. One end of the top plate 23 is connected to the first sub-plate 212, and one end of the bottom plate 24 is connected to the second sub-plate 213. A first groove 214 is provided on the bottom surface of the first sub-plate 212, and a second groove 215 is provided on the top surface of the second sub-plate 213. The first sub-plate 212 abuts the second sub-plate 213, and the first groove 214 and the second groove 215 form a first through-hole 211.

[0055] The second end plate 22 includes a third sub-plate 222 and a fourth sub-plate 223. The other end of the top plate 23 is connected to the third sub-plate 222, and the other end of the bottom plate 24 is connected to the fourth sub-plate 223. A third groove 224 is provided on the bottom surface of the third sub-plate 222, and a fourth groove 225 is provided on the top surface of the fourth sub-plate 223. The third sub-plate 222 and the fourth sub-plate 223 abut against each other, and the third groove 224 and the fourth groove 225 form a second through hole 221.

[0056] The first end plate 21 and the second end plate 22 are configured as separate parts to facilitate the connection between the sheath 2 and the iron core 1 .

[0057] like Figure 2 and Figure 4 As shown, the edge of the first end plate 21 is located outside the top plate 23 and the bottom plate 24, and the edge of the second end plate 22 is also located outside the top plate 23 and the bottom plate 24. When the coil 5 is wound on the sheath 2, one end of the coil 5 abuts the first end plate 21, and the other end of the coil 5 abuts the second end plate 22. The first end plate 21 and the second end plate 22 serve to limit the coil 5.

[0058] In addition, the first end plate 21 and the second end plate 22 cooperate with the structure of the housing 10 to fix the winding assembly.

[0059] like Figure 6 As shown, in some embodiments, the sheath 2 further includes a first positioning structure 25, which is disposed on the top plate 23 and / or the bottom plate 24. For example, the first positioning structure 25 includes a first positioning post 251 and a second positioning post 252, wherein the first positioning post 251 is disposed on the top plate 23 and the second positioning post 252 is disposed on the bottom plate 24.

[0060] The core 1 includes a second positioning structure 11, which is adapted to the first positioning structure 25. For example, the second positioning structure 11 includes a positioning hole, which is a through hole, into which the first positioning column 251 is inserted from above, and the second positioning column 252 is inserted from below.

[0061] In some embodiments, the sidewall of the second end plate 22 is provided with a wire retaining groove 26. The wire (not shown) connecting the coil 5 passes through the wire retaining groove 26. The wire retaining groove 26 engages with the wire to prevent loosening of the connection between the wire and the coil 5. Optionally, a wire retaining groove 26 is also provided on the first end plate 21.

[0062] like Figure 7 As shown, in some embodiments, the core 1 includes: a plurality of first chips 12 and a plurality of first chips 13. The second chips 13 are stacked alternately with the first chips 12, and adjacent first chips 12 and second chips 13 are staggered along the circumference of the core 1.

[0063] Optionally, the first chip 12 and the second chip 13 are both substantially semicircular in shape. Two adjacent first chips 12 form a first slot 14 at one end of the core 1 , and two adjacent second chips 13 form a second slot 15 at the other end of the core 1 .

[0064] like Figure 8As shown, an embodiment of the present application provides a winding mechanism 200, which includes a first winding assembly 210 and a second winding assembly 220. The first winding assembly 210 and the second winding assembly 220 are both the winding assembly 100 described above. The iron core of the second winding assembly 220 abuts against the iron core of the first winding assembly 210. For example, one end of the iron core of the first winding assembly 210 is plugged into one end of the iron core of the second winding assembly 220, and the other end of the iron core of the first winding assembly 210 is plugged into the other end of the iron core of the second winding assembly 220.

[0065] The embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the technical solutions and core concepts of the present application. Therefore, changes or modifications made by those skilled in the art based on the concepts of the present application, the specific implementation methods, and the scope of application of the present application, all fall within the scope of protection of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

1. A winding assembly, characterized in that: include: Iron core; Sheath, including: The first end plate is provided with a first through hole; A second end plate is provided with a second through hole, and the iron core passes through the first through hole and the second through hole respectively; a top plate, one end of which is connected to the first end plate, and the other end of which is connected to the second end plate; a bottom plate, one end of which is connected to the first end plate, and the other end of which is connected to the second end plate; a first insulating layer, disposed on one side of the iron core, the first insulating layer respectively connecting the first end plate, the second end plate, the top plate, and the bottom plate, and a thickness of the first insulating layer being less than a thickness of the top plate; a second insulating layer, disposed on the other side of the iron core, the second insulating layer respectively connecting the first end plate, the second end plate, the top plate, and the bottom plate, and a thickness of the second insulating layer being less than a thickness of the top plate; The coil is arranged on the sheath.

2. The winding assembly according to claim 1, characterized in that The first insulating layer and the second insulating layer are respectively bonded to the iron core.

3. The winding assembly according to claim 1, characterized in that The first insulating layer and the second insulating layer are both insulating films, and the insulating films are connected to the sheath.

4. The winding assembly according to claim 3, characterized in that The thickness of the insulating film is 0.05-0.2 mm.

5. The winding assembly according to claim 1, characterized in that The first end plate comprises: A first sub-plate is provided with a first groove; A second sub-plate is provided with a second groove, the first sub-plate abuts against the second sub-plate, and the first groove and the second groove form the first through hole; The second end plate comprises: A third sub-board is provided with a third groove, and the top board is connected to the first sub-board and the third sub-board respectively; The fourth sub-board is provided with a fourth groove. The bottom plate is respectively connected to the second sub-board and the fourth sub-board. The third sub-board abuts against the fourth sub-board. The third groove and the fourth groove form the second through hole.

6. The winding assembly according to claim 1, characterized in that The coils abut against the first end plate and the second end plate, respectively.

7. The winding assembly according to claim 1, characterized in that The sheath further includes a first positioning structure; The iron core includes a second positioning structure, and the second positioning structure is adapted to the first positioning structure.

8. The winding assembly according to claim 1, characterized in that The side wall of the second end plate is provided with a wire clamping slot, and the wire clamping slot is used for clamping the wire.

9. The winding assembly according to claim 1, characterized in that The iron core comprises: a plurality of first chips; A plurality of second chips are stacked alternately with the first chips.

10. A winding mechanism, characterized in that: include: A first winding assembly, comprising the winding assembly according to any one of claims 1 to 9; The second winding assembly comprises the winding assembly according to any one of claims 1 to 9, wherein the iron core of the second winding assembly abuts against the iron core of the first winding assembly.

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