CN221149791U - Current transformer - Google Patents
Current transformer Download PDFInfo
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- CN221149791U CN221149791U CN202322988942.2U CN202322988942U CN221149791U CN 221149791 U CN221149791 U CN 221149791U CN 202322988942 U CN202322988942 U CN 202322988942U CN 221149791 U CN221149791 U CN 221149791U
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- Prior art keywords
- magnetic ring
- iron core
- core magnetic
- current transformer
- wire
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 92
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 24
- 230000004308 accommodation Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model provides a current transformer, which comprises a shell, wherein an accommodating space is arranged in the shell, at least one current transformer component is arranged in the accommodating space, the current transformer component comprises a combined magnetic ring and a coil wound outside the combined magnetic ring, a wiring terminal matched with the current transformer component is arranged outside the shell, and the wiring terminal is electrically connected with the coil; the combined magnetic ring comprises a first iron core magnetic ring, a second iron core magnetic ring and a third amorphous magnetic ring which are coaxially arranged, wherein the second iron core magnetic ring and the third amorphous magnetic ring are arranged in the first iron core magnetic ring, the third iron core magnetic ring is arranged above the second iron core magnetic ring, and the first iron core magnetic ring and the second iron core magnetic ring are formed by encircling silicon steel sheets or silicon steel sheets. According to the utility model, the second iron core magnetic ring and the third amorphous magnetic ring are stacked in the first iron core magnetic ring, and the iron core magnetic ring and the amorphous magnetic ring can comprehensively monitor alternating current and direct current, so that the accuracy of current data is ensured.
Description
Technical Field
The utility model relates to the technical field of current transformers, in particular to a current transformer.
Background
With the development of technology, in order to ensure that each electrical and electronic device can operate normally, the current is monitored. Typical current monitoring is: working wires of the electrical and electronic equipment pass through a magnetic core hole of the current transformer, and the working current of the working wires is monitored through electromagnetic mutual inductance.
The traditional current transformer has the advantages that the magnetic rings inside the current transformer are made of single materials, for example, iron core magnetic rings which are made of silicon steel in a surrounding mode are low in cost and large in size; or an amorphous magnetic ring made of amorphous materials is high in cost and small in size. The magnetic rings with the two structures have limited magnetic permeability, and are particularly applied to large-current monitoring such as transformers, and the magnetic rings with the two structures have poor DC resistance and can directly influence the performance of the current transformer, so that the obtained current data is inaccurate.
Disclosure of utility model
The technical problems to be solved by the utility model are as follows: the current transformer solves the problem that working current data of a current transformer monitoring transformer in the prior art is inaccurate.
The utility model solves the problems by adopting the following technical scheme: the current transformer comprises a shell, wherein an accommodating space is formed in the shell, at least one current transformer component is arranged in the accommodating space, the current transformer component comprises a combined magnetic ring and a coil wound outside the combined magnetic ring, a wiring terminal matched with the current transformer component is arranged outside the shell, and the wiring terminal is electrically connected with the coil;
The combined magnetic ring comprises a first iron core magnetic ring, a second iron core magnetic ring and a third amorphous magnetic ring which are coaxially arranged, wherein the second iron core magnetic ring and the third amorphous magnetic ring are arranged in the first iron core magnetic ring, the third amorphous magnetic ring is arranged above the second iron core magnetic ring, and the first iron core magnetic ring and the second iron core magnetic ring are formed by encircling silicon steel sheets or silicon steel sheets.
Compared with the prior art, the utility model has the advantages that: the second iron core magnetic ring and the third amorphous magnetic ring are further arranged in the first iron core magnetic ring in a lamination mode, and the iron core magnetic ring and the amorphous magnetic ring can comprehensively monitor alternating current and direct current, so that accuracy of data is guaranteed; meanwhile, the third amorphous magnetic ring is smaller in size and is matched with the second iron core magnetic ring, so that the coil is prevented from moving when being wound around the first iron core magnetic ring and the third amorphous magnetic ring.
Preferably, the second iron core magnetic ring is in insulation and fixed connection with the first iron core magnetic ring, and the third amorphous magnetic ring is in detachable insulation and connection with the first iron core magnetic ring.
The technical scheme has the technical effects that: the third amorphous magnetic ring has smaller volume, and current monitoring with different requirements can be realized by replacing different third amorphous magnetic rings.
Preferably, the current transformer assembly further comprises an insulation annular protection sleeve, the insulation annular protection sleeve is arranged above the second iron core magnetic ring, the insulation annular protection sleeve is detachably connected with the first iron core magnetic ring, and the third amorphous magnetic ring is fixed in the insulation annular protection sleeve.
The technical scheme has the technical effects that: the third amorphous magnetic ring is fragile due to the amorphous structure of the third amorphous magnetic ring, and the third amorphous magnetic ring is protected by the insulating annular protective sleeve, so that the third amorphous magnetic ring is prevented from being broken in the winding process of the coil.
Preferably, the axial side surface below the second iron core magnetic ring and the axial side surface below the first iron core magnetic ring are located on the same horizontal plane, and the sum of the axial heights of the second iron core magnetic ring and the insulating annular protective sleeve is not greater than the axial height of the first iron core magnetic ring.
The technical scheme has the technical effects that: the second iron core magnetic ring and the insulating annular protective sleeve which are positioned on the inner ring are not more than the height of the first iron core magnetic ring, the coil is convenient to surround, and the third amorphous magnetic ring can be stably fixed on the first iron core magnetic ring and the second iron core magnetic ring in the surrounding process.
Preferably, the connection terminal comprises a first wire, a second wire and a third wire, wherein the first wire is electrically connected with one end of the coil, the second wire is electrically connected with the other end of the coil, and the third wire is electrically connected with the second wire.
The technical scheme has the technical effects that: two wiring ends of the coil are led out through the first lead and the second lead, so that current monitoring is facilitated; and then the third wire is matched with the first wire to realize multiple outputs of the monitored current.
Preferably, the first wire is electrically connected with the first conductive sheet outside the housing, the second wire is electrically connected with the second conductive sheet outside the housing, one end of the third wire is electrically connected with the second conductive sheet, and the other end of the third wire is electrically connected with the third conductive sheet.
The technical scheme has the technical effects that: through conducting strip structure, convenient external.
Preferably, three current transformer components are arranged in the accommodating space.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a current transformer according to the present utility model;
FIG. 2 is a schematic diagram of a current transformer assembly in a current transformer according to the present utility model;
Fig. 3 is a schematic structural diagram of an insulating annular protective sleeve and a third amorphous magnetic ring in a current transformer according to the present utility model.
Reference numerals illustrate: 1-a housing; 2-a current transformer assembly; 21-combining magnetic rings; 211-a first iron core magnetic ring; 212-a second iron core magnetic ring; 213-a third amorphous magnetic ring; 23-insulating annular protective sleeve; 3-connecting terminals; 31-a first wire; 32-a second wire; 33-a third wire; 41-a first conductive sheet; 42-a second conductive sheet; 43-third conductive sheet.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
As shown in fig. 1 to 3, the present embodiment relates to a current transformer, including a housing 1, an accommodating space is provided in the housing 1, at least one current transformer component 2 is provided in the accommodating space, the current transformer component 2 includes a combined magnetic ring 21 and a coil wound around the combined magnetic ring 21, the coil is wound around the combined magnetic ring 21, a connection terminal 3 paired with each current transformer component 2 is provided outside the housing 1, and the connection terminal 3 is electrically connected with the coil.
Wherein, the combined magnetic ring 21 includes a first iron core magnetic ring 211, a second iron core magnetic ring 212 and a third amorphous magnetic ring 213 coaxially arranged, the third amorphous magnetic ring 213 is arranged above the second iron core magnetic ring 212, the second iron core magnetic ring 212 and the third amorphous magnetic ring 213 are both arranged in the first iron core magnetic ring 211, specifically: the second iron core magnetic ring 212 and the third amorphous magnetic ring 213 are embedded in the middle of the first iron core magnetic ring 211, or the second iron core magnetic ring 212 and the third amorphous magnetic ring 213 are arranged at the inner ring position of the first iron core magnetic ring 211.
In this embodiment, the first iron core magnetic ring 211 and the second iron core magnetic ring 212 are formed by encircling silicon steel sheets or silicon steel sheets, and the third amorphous magnetic ring 213 is an amorphous magnetic ring in the prior art, which will not be described herein.
By further laminating the second iron core magnetic ring 212 and the third amorphous magnetic ring 213 in the first iron core magnetic ring 211, the alternating current and the direct current can be comprehensively monitored by adding the amorphous magnetic rings into the iron core magnetic ring, and the accuracy of data is ensured; meanwhile, the third amorphous magnetic ring 213 is smaller in size and is matched with the second iron core magnetic ring 212, so that the coil is prevented from moving in position when being wound around the first iron core magnetic ring 211 and the third amorphous magnetic ring 213.
The second iron core magnetic ring 212 is fixedly connected with the first iron core magnetic ring 211 in an insulating manner, for example, the second iron core magnetic ring 212 and the first iron core magnetic ring 211 are fixed by glue. The third amorphous magnetic ring 213 is detachably and insulatively connected with the first iron core magnetic ring 211, the third amorphous magnetic ring 213 is small in size, and current monitoring with different requirements can be achieved by replacing different third amorphous magnetic rings 213.
Referring to fig. 2 and 3, in the present embodiment, the current transformer assembly 2 further includes an insulating annular protection sleeve 23, the insulating annular protection sleeve 23 is disposed above the second core magnetic ring 212, the insulating annular protection sleeve 23 is detachably connected with the first core magnetic ring 211, and the third amorphous magnetic ring 213 is fixed in the insulating annular protection sleeve 23.
The third amorphous magnetic ring 213 is fragile due to the amorphous structure, and the third amorphous magnetic ring 213 is protected by the insulating annular protective sleeve 23, so that the third amorphous magnetic ring 213 is prevented from being broken in the winding process of the coil.
The insulating annular protective sleeve 23 comprises an upper protective sleeve and a lower protective sleeve, the third amorphous magnetic ring 213 is arranged in the lower protective sleeve, and then the third amorphous magnetic ring 213 is buckled on the lower protective sleeve through the upper protective sleeve, so that the third amorphous magnetic ring 213 is fixed between the upper protective sleeve and the lower protective sleeve.
An annular groove for accommodating the third amorphous magnetic ring 213 is arranged in the insulating annular protective sleeve 23, and after the third amorphous magnetic ring 213 is placed in the annular groove, buffer insulating materials such as insulating paper are arranged above the third amorphous magnetic ring 213, so that the coil is prevented from being broken in the winding process.
In the present embodiment, the axial side surface below the second core magnetic ring 212 and the axial side surface below the first core magnetic ring 211 are located at the same horizontal plane, and the sum of the axial heights of the second core magnetic ring 212 and the insulating annular protective sleeve 23 is not greater than the axial height of the first core magnetic ring 211.
The second iron core magnetic ring 212 and the insulating annular protective sleeve 23 which are positioned at the inner ring are not more than the first iron core magnetic ring 211, so that the coil is convenient to surround, and the third amorphous magnetic ring 213 can be stably fixed on the first iron core magnetic ring 211 and the second iron core magnetic ring 212 in the surrounding process.
Wherein the housing 1 comprises a base and an upper cover. In the actual use process, the second iron core magnetic ring 212 and the first iron core magnetic ring 211 are insulated and fixed, the third amorphous magnetic ring 213 is installed in the insulating annular protective sleeve 23, the insulating annular protective sleeve 23 is installed above the second iron core magnetic ring 212, the whole combined magnetic ring 21 is fully wrapped through insulating paper, the coil is uniformly wound outside the insulating paper, finally each current transformer assembly 2 is installed in the base, glue is injected to fix each current transformer assembly 2, the upper cover is covered, the upper cover and the base are connected and fixed through screws, the position stability of each current transformer assembly 2 in the base is guaranteed, and shaking cannot occur.
The insulating paper can further increase friction between the coil and the combined magnetic ring 21, preventing the coil from being displaced.
In the present embodiment, the connection terminal 3 includes a first wire 31, a second wire 32, and a third wire 33, the first wire 31 is electrically connected to one end of the coil, the second wire 32 is electrically connected to the other end of the coil, and the third wire 33 is electrically connected to the second wire 32.
Two wiring ends of the coil are led out through the first wire 31 and the second wire 32, so that current monitoring is facilitated; and then the third wire 33 is matched with the first wire 31 to realize multiple outputs of the monitored current.
The first conductive wire 31 is electrically connected to the first conductive sheet 41 outside the housing 1, the second conductive wire 32 is electrically connected to the second conductive sheet 42 outside the housing 1, one end of the third conductive wire 33 is electrically connected to the second conductive sheet 42, and the other end of the third conductive wire 33 is electrically connected to the third conductive sheet 43. Through conducting strip structure, convenient external. The conductive sheet can be an iron sheet or an iron sheet with a mounting hole, and is convenient to fix by screws.
In this embodiment, three current transformer assemblies 2 are provided in the accommodating space.
The beneficial effects of the utility model are as follows: the second iron core magnetic ring 212 and the third amorphous magnetic ring 213 which are stacked are further arranged in the first iron core magnetic ring 211, so that alternating current and direct current can be comprehensively monitored by the iron core magnetic ring and the amorphous magnetic ring, and the accuracy of data is ensured; meanwhile, the third amorphous magnetic ring 213 is smaller in size and is matched with the second iron core magnetic ring 212, so that the coil is prevented from moving when being wound around the first iron core magnetic ring 211 and the third amorphous magnetic ring 213.
While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.
Claims (7)
1. The utility model provides a current transformer, includes casing (1), be equipped with an accommodation space in casing (1), its characterized in that: the accommodating space is internally provided with at least one current transformer component (2), the current transformer component (2) comprises a combined magnetic ring (21) and a coil wound outside the combined magnetic ring (21), the shell (1) is externally provided with a wiring terminal (3) matched with the current transformer component (2), and the wiring terminal (3) is electrically connected with the coil;
The combined magnetic ring (21) comprises a first iron core magnetic ring (211), a second iron core magnetic ring (212) and a third amorphous magnetic ring (213) which are coaxially arranged, wherein the second iron core magnetic ring (212) and the third amorphous magnetic ring (213) are arranged in the first iron core magnetic ring (211), the third amorphous magnetic ring (213) is arranged above the second iron core magnetic ring (212), and the first iron core magnetic ring (211) and the second iron core magnetic ring (212) are formed by encircling silicon steel sheets or silicon steel sheets.
2. A current transformer according to claim 1, wherein: the second iron core magnetic ring (212) is fixedly connected with the first iron core magnetic ring (211) in an insulating mode, and the third amorphous magnetic ring (213) is detachably connected with the first iron core magnetic ring (211) in an insulating mode.
3. A current transformer according to claim 2, wherein: the current transformer assembly (2) further comprises an insulating annular protective sleeve (23), the insulating annular protective sleeve (23) is arranged above the second iron core magnetic ring (212), the insulating annular protective sleeve (23) is detachably connected with the first iron core magnetic ring (211), and the third amorphous magnetic ring (213) is fixed in the insulating annular protective sleeve (23).
4. A current transformer according to claim 3, wherein: the axial side face below the second iron core magnetic ring (212) and the axial side face below the first iron core magnetic ring (211) are located on the same horizontal plane, and the sum of the axial heights of the second iron core magnetic ring (212) and the insulating annular protective sleeve (23) is not larger than the axial height of the first iron core magnetic ring (211).
5. A current transformer according to claim 1, wherein: the wiring terminal (3) comprises a first wire (31), a second wire (32) and a third wire (33), wherein the first wire (31) is electrically connected with one end of the coil, the second wire (32) is electrically connected with the other end of the coil, and the third wire (33) is electrically connected with the second wire (32).
6. A current transformer according to claim 5, wherein: the first conducting wire (31) is electrically connected with the first conducting strip (41) outside the shell (1), the second conducting wire (32) is electrically connected with the second conducting strip (42) outside the shell (1), one end of the third conducting wire (33) is electrically connected with the second conducting strip (42), and the other end of the third conducting wire (33) is electrically connected with the third conducting strip (43).
7. A current transformer according to claim 1, wherein: three current transformer components (2) are arranged in the accommodating space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322988942.2U CN221149791U (en) | 2023-11-07 | 2023-11-07 | Current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322988942.2U CN221149791U (en) | 2023-11-07 | 2023-11-07 | Current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221149791U true CN221149791U (en) | 2024-06-14 |
Family
ID=91422446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322988942.2U Active CN221149791U (en) | 2023-11-07 | 2023-11-07 | Current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221149791U (en) |
-
2023
- 2023-11-07 CN CN202322988942.2U patent/CN221149791U/en active Active
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