CN214152681U - Rogowski current sensor - Google Patents
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- CN214152681U CN214152681U CN202120328516.4U CN202120328516U CN214152681U CN 214152681 U CN214152681 U CN 214152681U CN 202120328516 U CN202120328516 U CN 202120328516U CN 214152681 U CN214152681 U CN 214152681U
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Abstract
The utility model relates to a current detection technical field discloses a rogowski current sensor. The rogowski coil comprises a rogowski coil and a shield, wherein the shield is provided with two mounting holes surrounded by an electric conductor and a magnetic conductor, one end of the rogowski coil is configured to be permanently or detachably inserted into one mounting hole, and the other end of the rogowski coil is configured to be permanently or detachably inserted into the other mounting hole. When the device is closed, the gap between the two ends of the Rogowski coil is positioned in the shielding body, so that the wiring position of the Rogowski coil and the signal output cable is also positioned in the shielding body and surrounded by the electric conductor, the interference caused by space interference signals, namely the interference of an electromagnetic field and a magnetic field, can be effectively avoided, and the distortion degree of the measurement signals is reduced.
Description
Technical Field
The utility model relates to a current detection technical field especially relates to a rogowski current sensor.
Background
Rogowski coils (Rogowski Coil), also known as Rogowski coils, are a common current measuring tool. In use, one end of the rogowski coil needs to be connected with a signal output cable. However, the connection points are always free of gaps, i.e. the connection points are not surrounded by the shielding mesh. Further, the spatial interference signal inevitably causes interference, which distorts the measurement signal and increases the distortion of the measurement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a rogowski current sensor, it shields external disturbance through the shielding body to measurement accuracy has been improved.
The embodiment of the utility model discloses a realize through following technical scheme:
a Rogowski current sensor comprises a Rogowski coil and a shield, the shield having two mounting holes surrounded by an electrical conductor and a magnetic conductor, one end of the Rogowski coil being configured to be permanently or removably inserted into one of the mounting holes, the other end of the Rogowski coil being configured to be permanently or removably inserted into the other mounting hole.
Further, the mounting hole is formed on the magnetizer.
Furthermore, the shielding body comprises at least two layers of electric conductors, and the materials of the electric conductors are different.
Furthermore, the shielding body comprises at least two layers of magnetizers, and the materials of the magnetizers are different.
Furthermore, at least one grounding device is arranged on the shielding body.
Further, the shield is composed of one part or a plurality of parts; the shielding body is made of at least one of pure iron, low-carbon steel, permalloy, amorphous nanocrystalline alloy or silicon steel.
Furthermore, the shield comprises a magnetic conduction core body formed by a magnetic conductor and a conductive shell which wraps the magnetic conduction core body and is formed by a conductor; the mounting hole is opened on the magnetic conduction core body, is equipped with the through-hole that corresponds with the mounting hole on the electrically conductive shell.
Further, the conductive shell is composed of one part or at least two parts; the magnetic conducting core body consists of one part or at least two parts.
Further, the conductive shell and/or the magnetically conductive core are composed of at least two separable parts.
Further, the conductive shell is made of at least one of iron, iron alloy, aluminum alloy, copper alloy, zinc alloy, nickel alloy, tin alloy, gold alloy, silver alloy, graphite, tungsten alloy, chromium alloy, titanium or titanium alloy; the material of the magnetic conductive core body comprises at least one of soft magnetic ferrite, pure iron and low carbon steel, iron-silicon alloy, iron-aluminum alloy, iron-silicon-aluminum alloy, permalloy, iron-cobalt alloy, amorphous soft magnetic alloy and ultra-microcrystalline soft magnetic alloy.
The technical scheme of the utility model following advantage and beneficial effect have at least:
the embodiment of the utility model provides a rogowski current sensor, it includes the shielding body, and the shielding body has two mounting holes that are surrounded by the electric conductor. When the Rogowski coil is closed, two ends of the Rogowski coil are respectively inserted into two mounting holes formed in the shielding body. The two ends of the Rogowski coil are positioned in the shielding body and surrounded by the electric conductor, so that the wiring position of the Rogowski coil and the signal output cable is also positioned in the shielding body and surrounded by the electric conductor and the magnetizer, the interference caused by space interference signals, namely the interference of an electromagnetic field and a magnetic field, can be effectively avoided, and the distortion degree of the measurement signals is reduced.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below. It is to be understood that the following drawings are merely illustrative of certain embodiments of the invention and are not to be considered limiting of its scope. From these figures, other figures can be derived by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a rogowski coil in a rogowski current sensor according to embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional view of a closed portion in a rogowski current sensor according to embodiment 1 of the present invention;
fig. 3 is a schematic cross-sectional view of a closed portion in a rogowski current sensor according to embodiment 2 of the present invention;
fig. 4 is a schematic cross-sectional view of a closed portion in a rogowski current sensor according to embodiment 3 of the present invention;
fig. 5 is a schematic cross-sectional view of a closed portion in a rogowski current sensor according to embodiment 4 of the present invention;
fig. 6 is a schematic cross-sectional view of a closed portion in a rogowski current sensor according to embodiment 5 of the present invention;
fig. 7 is a schematic view of another combination manner of the closing part in the rogowski current sensor according to embodiment 5 of the present invention.
Fig. 8 is a schematic cross-sectional view of a closed portion in a rogowski current sensor according to embodiment 6 of the present invention.
Fig. 9 is a second schematic cross-sectional view of a closed portion in a rogowski current sensor according to embodiment 6 of the present invention.
In the figure: 100-rogowski coils; 101-a first end; 102-a second end; 110-a conductive coil; 120-conductive return line; 200-a shield; 200 a-first portion; 200 b-a second portion; 201-a first mounting hole; 202-a second mounting hole; 210-a magnetically permeable core; 220-a conductive shell; 221-opening; 222-edge; 230-a filling support layer; 301-signal output cable; 400-a grounding device; 020-conductor to be measured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and the features and technical solutions in the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Example 1:
fig. 1 is a schematic structural diagram of a rogowski coil 100 in the rogowski current sensor provided in this embodiment. Fig. 2 is a schematic cross-sectional view of a closed portion in the rogowski current sensor provided in this embodiment, and only two ends of the rogowski coil 100 are shown in fig. 2 in order to show the structure of the closed portion more clearly.
Referring to fig. 1 and fig. 2 in combination, in the present embodiment, the rogowski current sensor includes a rogowski coil 100 and a shield 200.
The rogowski coil 100 includes a conductive coil 110 surrounding a support (not shown), and a conductive return wire 120 extending substantially along a central axis of the conductive coil 110. One end of the conductive return line 120 is connected to one end of the conductive coil 110 to form the first end 101 of the rogowski coil 100. The other end of the conductive return line 120 is proximate the other end of the conductive coil 110 and forms the second end 102 of the rogowski coil 100. The conductive coil 110 is wrapped by an insulating sheath (not shown), and a shielding layer (not shown) may be disposed outside the insulating sheath. The second end 102 of the rogowski coil 100 is connected with a signal output cable 301, which signal output cable 301 is connected to a processing circuit (not shown) for processing the signal provided by the rogowski coil 100 for measuring the current in a conductor 020 to be measured surrounded by the rogowski coil 100.
In this embodiment, two mounting holes surrounded by the conductor and the magnetizer, i.e., a first mounting hole 201 and a second mounting hole 202, are opened on the shield 200. The first end 101 of the rogowski coil 100 is removably inserted into the first mounting hole 201, and the second end 102 of the rogowski coil 100 is removably inserted into the second mounting hole 202. This allows the rogowski current sensor to be easily moved around or off the conductor 020 to be measured. It will be appreciated that in other embodiments, the rogowski current sensor may also be configured in such a way that the first end 101 of the rogowski coil 100 is permanently inserted into the first mounting hole 201 and the second end 102 of the rogowski coil 100 is removably inserted into the second mounting hole 202. Conversely, it is also possible that the first end 101 of the rogowski coil 100 is removably inserted into the first mounting hole 201 and the second end 102 of the rogowski coil 100 is permanently inserted into the second mounting hole 202. In addition, it is also possible that the first end 101 of the rogowski coil 100 is permanently inserted into the first mounting hole 201 and the second end 102 of the rogowski coil 100 is permanently inserted into the second mounting hole 202.
In the present embodiment, the first mounting hole 201 and the second mounting hole 202 are bridged across each other, which causes the first end 101 and the second end 102 to be bridged across each other in the closed state of the rogowski coil 100. In other embodiments, the first mounting hole 201 and the second mounting hole 202 may be coaxially arranged such that the first end 101 and the second end 102 are directly opposite. In this case, the first mounting hole 201 and the second mounting hole 202 may also communicate with each other.
In the present embodiment, the signal output cable 301 is led out directly from the second mounting hole 202. In another embodiment, a third mounting hole communicating with the second mounting hole 202 may be opened in the shield 200, and the signal output cable 301 may be inserted into the third mounting hole and connected to the second end 102 of the rogowski coil 100. The connection of the signal output cable 301 to the second end 102 may be wrapped with an insulating material (e.g., a heat shrink sleeve).
When the rogowski coil 100 is closed, its two ends are inserted into two mounting holes provided in the shield 200, respectively. The two ends of the rogowski coil 100 are located in the shield 200 and surrounded by the electric conductor and the magnetizer, so that the connection point of the second end 102 of the rogowski coil 100 and the signal output cable 301 is also located in the shield 200 and surrounded by the electric conductor and the magnetizer, and is grounded through the grounding device, thus being capable of more effectively avoiding the interference caused by space interference signals, namely the interference of electromagnetic fields, electric fields and/or magnetic fields, and reducing the distortion degree of the measurement signals.
In this embodiment, the whole shield 200 is made of pure iron, which has low cost and is easy to process. Further, the shield 200 made of pure iron has a magnetic function (pure iron is both an electric conductor and a magnetizer) while conducting electricity. When closed, the gap between the two ends of the rogowski coil 100 is located within the shield 200. Because the shielding body 200 has a magnetic conductive function, compared with air, the shielding body 200 can provide higher magnetic conductivity, and realize interference shielding of an electromagnetic field, an electric field and a magnetic field, thereby improving the accuracy of signal output. The pure iron material has low cost and easy processing, and can effectively reduce the manufacturing cost of the Rogowski current sensor while realizing the shielding function and the magnetic conduction function.
In other embodiments, the shield 200 may be made of other materials (i.e. the conductive body is also a magnetic conductive body) that are both conductive and magnetic conductive, so that the shield 200 can perform the functions of shielding and magnetic conductive at the same time. At this time, the first mounting hole 201 and the second mounting hole 202 are formed on the magnetic conductor and surrounded by the electric conductor. For example, the material of the shield 200 may include at least one of low carbon steel, permalloy, amorphous nanocrystalline alloy, or silicon steel.
In the present embodiment, a grounding device 400 is further provided on the shield 200. The grounding device 400 is a grounding screw for connecting a grounding cable. It will be appreciated that in other embodiments, the grounding device 400 may be implemented in other forms as long as it is capable of achieving a grounding effect, such as a grounding wire soldered directly to the shield 200. It is understood that in other embodiments, two or more grounding devices 400 may be disposed on the shielding body 200 to perform targeted shielding on interference signals with different frequencies by multipoint grounding. For example, for low-frequency interference signals, a grounding device 400 may be used to implement shielding by means of single-point grounding; for high-frequency interference signals, a plurality of grounding devices 400 can be adopted to realize shielding in a multipoint grounding manner.
In other embodiments, the shield 200 may include at least two layers of conductors, and the conductors may be made of different materials. For example, one layer of the conductor is made of copper, and the other layer of the conductor is made of zinc. Because the impedance on the interface of each layer of conductor is discontinuous, the interference signal is continuously reflected and absorbed between each layer of conductor, thereby realizing the effective attenuation of the interference signal and improving the anti-interference capability. It is understood that the conductors of the various layers may or may not be in contact with each other. When the conductors are not in contact with each other, a filler may be disposed between the conductors.
It should be noted that, in other embodiments, the shield 200 may include at least two layers of magnetizers, and the material of each layer of magnetizer is different. For example, the material of one layer of magnetizer is permalloy, and the material of the other layer of magnetizer is soft magnetic ferrite. Because the impedance on the interface of each layer of magnetizer is discontinuous, the interference signal is continuously reflected and absorbed between each layer, thereby realizing the effective attenuation of the interference signal and improving the anti-interference capability. It can be understood that the magnetizers of each layer can be mutually contacted or not contacted. When the magnetizers of each layer are not contacted with each other, fillers can be arranged among the magnetizers of each layer.
It is understood that when the shield 200 includes at least two conductive layers and at least two conductive layers, the spatial relationship between the conductive layers and the conductive layers can be set as desired. For example, a magnetizer is disposed between two layers of the conductive bodies, or a conductive body is disposed between two layers of the magnetizer, or the conductive bodies and the magnetizer are alternately disposed, and the like.
In other embodiments, the conductive body may be a conductive layer attached to a base made of a non-conductive material (e.g., plastic). The conductive layer is formed on the surface of the substrate by surface treatment techniques such as surface coating or spraying. The conducting layer is made of conducting materials. For example, the material of the conductive layer may include at least one of conductive materials such as gold, silver, copper, nickel, permalloy, tungsten alloy, chromium alloy, and titanium. The conductive layer may be continuous and dense or may be a mesh, such as a conductive fiber cloth.
In another embodiment, the conductive body may be a conductive layer attached to the magnetic conductor, and the conductive layer is formed on the surface of the magnetic conductor by surface coating, spraying, or adhering. The conducting layer is made of conducting materials. For example, the material of the conductive layer may include at least one of conductive materials such as gold, silver, copper, nickel, permalloy, chromium alloy, and titanium. The conductive layer may be continuous and dense or may be a mesh, such as a conductive fiber cloth.
Example 2:
fig. 3 is a schematic cross-sectional view of a closed portion in the rogowski current sensor provided in this embodiment. This embodiment is substantially the same as embodiment 1 except that the shield 200 is different. Referring to fig. 3, in the present embodiment, the shield 200 includes a magnetic core 210 made of a magnetic conductor, and a conductive shell 220 made of a conductive body and covering the magnetic core 210. The first mounting hole 201 and the second mounting hole 202 are both disposed on the magnetic conductive core 210, and the conductive shell 220 is provided with through holes corresponding to the first mounting hole 201 and the second mounting hole 202.
In the present embodiment, the conductive shell 220 is made of pure iron to provide a shielding function. It is understood that in other embodiments, the conductive shell 220 may be made of other conductive materials. For example, the conductive shell 220 may be made of at least one conductive material selected from iron alloy, aluminum alloy, copper alloy, zinc alloy, nickel alloy, tin alloy, gold alloy, silver alloy, graphite, tungsten alloy, chromium alloy, titanium, and titanium alloy.
In this embodiment, the material of the magnetically conductive core 210 is soft magnetic ferrite. It is understood that in other embodiments, other magnetizers may be used to fabricate the magnetically permeable core 210. For example, the material of the magnetic core 210 may include at least one of pure iron and at least one of low carbon steel, iron-silicon-based alloy, iron-aluminum-based alloy, iron-silicon-aluminum-based alloy, permalloy, iron-cobalt-based alloy, amorphous soft magnetic alloy, and ultra-crystalline soft magnetic alloy.
In the present embodiment, the grounding device 400 is disposed on the conductive shell 220.
In addition, in the present embodiment, the conductive shell 220 is composed of one component, and it is understood that in other embodiments, the conductive shell 220 may be composed of two or more components. When the conductive shell 220 is composed of two or more parts, at least two of the parts may also be configured in a separable form. In the present embodiment, the magnetically permeable core 210 is composed of one component, and it is understood that in other embodiments, the magnetically permeable core 210 may be composed of two or more components. When the magnetically conductive core 210 is composed of two or more parts, at least two of the parts may also be configured in a separable manner.
In the present embodiment, the conductive shell 220 is continuous and dense, and in other embodiments, the conductive shell 220 may also be a mesh.
It is understood that in other embodiments, the conductive shell 220 may be formed of at least two layers of conductors, each layer of conductor being of a different material. The magnetic core 210 may be composed of at least two layers of magnetic conductors, and the materials of the magnetic conductors are different.
Example 3:
fig. 4 is a schematic cross-sectional view of a closed portion in the rogowski current sensor provided in this embodiment. This embodiment is substantially the same as embodiment 2, except that a filler support layer 230 is disposed between the magnetically permeable core 210 and the electrically conductive shell 220. The first and second mounting holes 201 and 202 each penetrate the filling support layer 230. The filler support layer 230 may be made of an insulating rubber or other non-conductive material. In other embodiments, the filling support layer 230 may also be made of conductive material or soft magnetic material with different thickness and material for interference of electromagnetic field with different frequencies, so as to better shield or suppress the interference.
Example 4:
fig. 5 is a schematic cross-sectional view of a closed portion in the rogowski current sensor provided in this embodiment. This embodiment is substantially the same as embodiment 1 except that the shield body 200 includes two separable parts, i.e., a first part 200a and a second part 200b, a first mounting hole 201 is opened in the first part 200a, and a second mounting hole 202 is opened in the second part 200 b. The first and second portions 200a and 200b may be joined together when the rogowski current sensor surrounds the conductor to be measured, and the first and second portions 200a and 200b may be separated from each other to enable the rogowski current sensor to be removed from the conductor to be measured. Various means such as clamping, hinging, bonding, screwing, clamping, wrapping of the outer material, etc. may be used to directly join the first and second portions 200a and 200 b.
It will be appreciated that in other embodiments, the shield 200 may also include three or more portions that are separable. A first mounting hole 201 and a second mounting hole 202 are provided on two portions thereof, respectively.
Example 5:
fig. 6 is a schematic cross-sectional view of a closed portion in the rogowski current sensor provided in this embodiment. This embodiment is substantially the same as embodiment 2. The difference is that the shield 200 comprises two separable parts, namely a first part 200a and a second part 200b, each of the first part 200a and the second part 200b comprising a magnetically permeable core 210 and a conductive shell 220 surrounding the magnetically permeable core 210. The first mounting hole 201 is opened on the magnetic conductive core 210 of the first portion 200a, and the conductive shell 220 of the first portion 200a is provided with a through hole corresponding to the first mounting hole 201. The second mounting hole 202 is opened on the magnetic conductive core 210 of the second portion 200b, and the conductive shell 220 of the second portion 200b is provided with a through hole corresponding to the second mounting hole 202. The first and second portions 200a and 200b may be joined together when the rogowski current sensor surrounds the conductor to be measured, and the first and second portions 200a and 200b may be separated from each other to enable the rogowski current sensor to be removed from the conductor to be measured. Various means such as clamping, hinging, bonding, screwing, clamping, wrapping of the outer material, etc. may be used to directly join the first and second portions 200a and 200 b.
As shown in fig. 6, in the present embodiment, the first portion 200a and the second portion 200b are coupled in such a manner that the first mounting hole 201 and the second mounting hole 202 do not form a bridge. Of course, the coupling position of the first and second portions 200a and 200b may be adjusted, as shown in fig. 7, such that the first and second mounting holes 201 and 202 are bridged.
In the present embodiment, the conductive shell 220 is made of a material that is both conductive and permeable to electricity. For example, the conductive shell 220 may include at least one of pure iron, low carbon steel, permalloy, amorphous nanocrystalline alloy, or silicon steel.
Example 6:
fig. 8 is a first cross-sectional view of a closed portion in the rogowski current sensor provided in this embodiment. Fig. 9 is a second cross-sectional view of a closed portion in the rogowski current sensor provided in this embodiment. This example is substantially the same as example 5. Except that an opening 221 is provided on the conductive shell 220. The first portion 200a and the second portion 200b are separated from each other such that the magnetically permeable core 210 of the first portion 200a is exposed through the opening 221, and the magnetically permeable core 210 of the second portion 200b is also exposed through the opening 221 (see fig. 8). When the first and second portions 200a, 200b are coupled to one another, the magnetically permeable core 210 of the first portion 200a and the magnetically permeable core 210 of the second portion 200b are in contact with one another (see fig. 9). On the basis, the conductive shell 220 may be made of a conductive material, for example, the conductive shell 220 may be made of at least one of aluminum, copper or zinc.
Further, in the present embodiment, when the first portion 200a and the second portion 200b are combined with each other, the edge 222 of the opening 221 formed by the conductive shell 220 of the first portion 200a and the edge 222 of the opening 221 formed by the conductive shell 220 of the second portion 200a contact each other, so that the conductive shell 220 covers the magnetic conductive core 210 to the maximum extent.
Comparative experiment:
the rogowski current sensor described in example 1 was tested in comparison with two comparative examples to illustrate the advantages of the rogowski current sensor provided by embodiments of the present invention.
The rogowski current sensor described in embodiment 1 includes a rogowski coil 100 and a shield 200, the shield 200 is made of pure iron, and a grounding device 400 is provided on the shield 200. During the experiment, the shield 200 was grounded by the grounding device 400. Wherein the length of the rogowski coil 100 is 50cm and the copper wire diameter of the conductive coil 110 of the rogowski coil 100 is 0.8 mm. The conductive coil 110 is wound on the support body, the diameter of the support body is 4mm, and the cross-sectional area of the center of the support body is 0.5mm2 Conductive return line 120. The conductive coil 110 is wrapped by a wrapping material, and the wrapping material sequentially includes an insulating layer, a shielding layer, and an insulating layer from inside to outside.
Comparative example 1: the rogowski current sensor provided by this comparative example is substantially identical to that described in example 1, except that the shield 200 is made of ferrite.
Comparative example 2: the rogowski current sensor provided in this comparative example is substantially the same as that described in example 1, except that the grounding device 400 is not provided on the shield 200, and is not grounded during the experiment.
The experimental process comprises the following steps: the rogowski current sensor is made to surround the conductor to be measured, the signal output cable 301 of the rogowski current sensor is a copper-clad shield cable, and is connected with a multifunctional current detector of the type WXDK-338, and the shield is grounded. Firstly, electrifying the conductor to be measured, and recording the current value I displayed by the multifunctional current detector under the condition of no interferenceF(unit is A). Then, interference was applied using a walkie-talkie (model I-800, power 8W, frequency 800MHz) at a distance of 200 cm from the shield and recorded as receivedThe current value I displayed by the multifunctional current detector under the condition of interferenceG(unit is A). Finally, an error rate is calculated from the current values recorded twice. Error rate [ (I)G-IF)/IF]100%. The smaller the absolute value of the error rate, the stronger the interference rejection of the rogowski current sensor.
The results of the experiments are shown in the following table.
Can find out through the experimental result of record in the upper table, the embodiment of the utility model provides a shielding electromagnetic field's that rogowski current sensor can be better interference reduces the distortion factor of data.
The embodiment of the utility model provides a rogowski current sensor, it includes the shielding body, and the shielding body has two mounting holes that are surrounded by the electric conductor. When the Rogowski coil is closed, two ends of the Rogowski coil are respectively inserted into two mounting holes formed in the shielding body. The two ends of the Rogowski coil are positioned in the shielding body and surrounded by the electric conductor, so that the wiring position of the Rogowski coil and the signal output cable is also positioned in the shielding body and surrounded by the electric conductor, and thus, the interference caused by space interference signals, namely the interference of an electromagnetic field and a magnetic field, can be effectively avoided, and the distortion degree of the measurement signals is reduced.
The above description is only a few examples of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Rogowski current sensors, including rogowski coils and shields, are characterized by:
the shield has two mounting holes surrounded by an electrical conductor and a magnetic conductor, one end of the rogowski coil is configured to be permanently or removably inserted into one of the mounting holes, and the other end of the rogowski coil is configured to be permanently or removably inserted into the other of the mounting holes.
2. The rogowski current sensor of claim 1, wherein:
the mounting hole is formed on the magnetizer.
3. The rogowski current sensor of claim 1, wherein:
the shielding body comprises at least two layers of the electric conductors, and the electric conductors of all the layers are made of different materials.
4. The rogowski current sensor of claim 1, wherein:
the shielding body comprises at least two layers of magnetizers, and the material of each layer of magnetizer is different.
5. The rogowski current sensor of claim 1, wherein:
at least one grounding device is arranged on the shielding body.
6. The rogowski current sensor of claim 1, wherein:
the shield is composed of one or more parts;
the shielding body is made of pure iron, low-carbon steel, permalloy, amorphous nanocrystalline alloy or silicon steel.
7. The rogowski current sensor according to claim 2, wherein:
the shielding body comprises a magnetic conduction core body formed by the magnetic conductor and a conductive shell which wraps the magnetic conduction core body and is formed by the conductor;
the mounting hole is arranged on the magnetic conduction core body, and the conductive shell is provided with a through hole corresponding to the mounting hole.
8. The rogowski current sensor of claim 7, wherein:
the conductive shell is composed of one part or at least two parts;
the magnetic conducting core body consists of one part or at least two parts.
9. The rogowski current sensor of claim 8, wherein:
the conductive shell and/or the magnetically permeable core are composed of at least two separable parts.
10. A rogowski current sensor according to any of claims 7-9, characterised in that:
the conductive shell is made of iron, iron alloy, aluminum alloy, copper alloy, zinc alloy, nickel alloy, tin alloy, gold alloy, silver alloy, graphite, tungsten alloy, chromium alloy, titanium or titanium alloy;
the magnetic core body is made of soft magnetic ferrite, pure iron and low carbon steel, iron-silicon alloy, iron-aluminum alloy, iron-silicon-aluminum alloy, permalloy, iron-cobalt alloy, amorphous soft magnetic alloy or ultra-crystalline soft magnetic alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120328516.4U CN214152681U (en) | 2021-02-04 | 2021-02-04 | Rogowski current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120328516.4U CN214152681U (en) | 2021-02-04 | 2021-02-04 | Rogowski current sensor |
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| CN214152681U true CN214152681U (en) | 2021-09-07 |
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| CN202120328516.4U Active CN214152681U (en) | 2021-02-04 | 2021-02-04 | Rogowski current sensor |
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2021
- 2021-02-04 CN CN202120328516.4U patent/CN214152681U/en active Active
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