CN119400570B - A current transformer using high-frequency magnetic ring method to suppress electromagnetic interference - Google Patents
A current transformer using high-frequency magnetic ring method to suppress electromagnetic interference Download PDFInfo
- Publication number
- CN119400570B CN119400570B CN202411764951.6A CN202411764951A CN119400570B CN 119400570 B CN119400570 B CN 119400570B CN 202411764951 A CN202411764951 A CN 202411764951A CN 119400570 B CN119400570 B CN 119400570B
- Authority
- CN
- China
- Prior art keywords
- magnetic ring
- housing
- fixedly connected
- ring
- current transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
-
- 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
- H01F27/266—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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2895—Windings disposed upon ring cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase AC
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase AC
- H01F38/28—Current transformers
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
本发明涉及电流互感器技术领域，尤其涉及一种采用高频磁环法抑制电磁干扰的电流互感器。外壳；端口，具有两个，均固定连接且贯穿于所述外壳；线圈，固定连接于所述外壳的内部；主磁环，具有两个，均固定连接于所述外壳的内部，分别分布于所述线圈的两侧；固定架，固定连接于所述外壳的内部，所述固定架滑动连接有若干滑动架，所述滑动架固定连接有两个副磁环，所述副磁环与相邻的所述主磁环贴合；稳定组件，设置于所述外壳内；驱动组件，设置于所述外壳内。本发明通过改变副磁环与主磁环的贴合位置，使主磁环靠近外部电器元件的一侧形成与副磁环的叠加态，增大对外界干扰磁场的抵御能力，提高本装置的对电流的检测精度。
The present invention relates to the technical field of current transformers, and in particular to a current transformer that uses a high-frequency magnetic ring method to suppress electromagnetic interference. A housing; two ports, both fixedly connected and running through the housing; a coil, fixedly connected to the inside of the housing; two main magnetic rings, both fixedly connected to the inside of the housing, respectively distributed on both sides of the coil; a fixed frame, fixedly connected to the inside of the housing, the fixed frame being slidably connected to a plurality of sliding frames, the sliding frames being fixedly connected to two secondary magnetic rings, the secondary magnetic rings being fitted with the adjacent main magnetic rings; a stabilizing component, disposed in the housing; a driving component, disposed in the housing. The present invention changes the fitting position of the secondary magnetic ring and the main magnetic ring, so that the side of the main magnetic ring close to the external electrical component forms a superposition state with the secondary magnetic ring, thereby increasing the ability to resist external interference magnetic fields and improving the current detection accuracy of the device.
Description
Technical Field
The invention relates to the technical field of current transformers, in particular to a current transformer for inhibiting electromagnetic interference by adopting a high-frequency magnetic ring method.
Background
The current transformer is used for measuring and protecting the current in a circuit, the large current is converted into the small current, so that a measuring instrument and a protecting device can safely and accurately work, when the current transformer works based on an electromagnetic induction principle and a primary side winding passes through the large current, a magnetic field is generated, the magnetic field induces a small current in a secondary side winding, the turn ratio of the primary side winding and the secondary side winding determines the current transformation ratio, the large current in a measuring cable is further converted into the small current, the existing current transformer is mostly arranged in a power distribution cabinet so as to realize the measurement of various data of the power distribution cabinet, but because a large number of electrical components exist in the power distribution cabinet, the electrical components can generate magnetic fields to interfere the current transformer, and when the existing current transformer is arranged on two sides of a coil, the magnetic rings resist the external electromagnetic interference, but when certain high-power electrical components in the power distribution cabinet generate high-frequency electromagnetic interference under the conditions of switching-on operation, system short circuit and the like, the high-wave front of the high-frequency electromagnetic interference has the characteristics of high frequency, steep wave front, high-wave front, the like, the simple magnetic rings can not effectively harm the electromagnetic interference to the large-current transformer, and the like, and the mutual inductor can be further be prevented from damaging the current transformer, and the measuring precision of the winding can be reduced.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention provides a current transformer for inhibiting electromagnetic interference by adopting a high-frequency magnetic ring method.
The technical scheme is that the current transformer for inhibiting electromagnetic interference by adopting a high-frequency magnetic ring method comprises the following components:
a housing;
the two ports are fixedly connected and penetrate through the shell;
a coil fixedly connected to the inside of the housing;
the main magnetic rings are fixedly connected to the inside of the shell and are respectively distributed on two sides of the coil;
The fixing frame is fixedly connected to the inside of the shell, a plurality of sliding frames are connected to the fixing frame in a sliding mode, two auxiliary magnetic rings are fixedly connected to the sliding frames, and the auxiliary magnetic rings are attached to the adjacent main magnetic rings;
the stabilizing component is arranged in the shell and is used for stabilizing the conversion current of the coil;
the driving assembly is arranged in the shell and used for changing the attaching position of the auxiliary magnetic ring and the main magnetic ring.
As a preferred technical solution of the present invention, the stabilizing assembly includes:
the stable magnetic ring is fixedly connected to the inside of the shell;
the two coils are wound and symmetrically distributed on the stable magnetic ring, one ends of the two coils are respectively and electrically connected with two ends of a cable on the coil, and the other ends of the two coils are respectively and electrically connected with two ports.
As a preferable technical scheme of the invention, the inner diameter of the coil is smaller than the inner diameter of the main magnetic ring, and the outer diameter of the coil is larger than the outer diameter of the main magnetic ring.
As a preferable technical scheme of the invention, the outer part of the auxiliary magnetic ring is a continuous wave-shaped cambered surface, and two sides of the auxiliary magnetic ring are provided with continuous cambered surfaces.
As a preferable technical scheme of the invention, the wave crest of the outer wavy cambered surface of the auxiliary magnetic ring is gradually reduced from the middle part to the two ends, and the wave crest is used for continuously changing the magnetic field intensity.
As a preferred technical solution of the present invention, the driving assembly includes:
the adjusting shaft is connected to the shell in a sliding and rotating mode, and penetrates through the shell;
the outer ring is fixedly connected to the inside of the shell, and the adjusting shaft is in sealed sliding connection with the outer ring;
The inner ring is connected to the inner part of the outer ring in a sealing and rotating way, and the inner ring and the outer ring are matched to form a closed cavity;
The pushing assembly is arranged on the adjusting shaft and used for driving the sliding frames to slide around the fixing frame.
As a preferred technical solution of the present invention, the pushing assembly includes:
The piston shaft is connected in the inner ring in a sealing sliding manner, the piston shaft is in contact fit with the sliding frame, and a first elastic element is arranged between the piston shaft and the inner ring;
The gear is fixedly connected to the adjusting shaft and is positioned in the shell;
a toothed ring fixedly connected to the inner ring, the gear is meshed with the toothed ring.
As a preferable technical scheme of the invention, the thickness of the toothed ring is larger than that of the gear, so that the toothed ring and the gear are always in a butt joint state.
As a preferable technical scheme of the invention, the invention further comprises:
the locking component is arranged on the fixing frame and is used for locking all the sliding frames to the fixing frame, and the locking component comprises:
The limiting blocks are the same as the sliding frames in number and are respectively connected to the adjacent sliding frames in a sliding way, limiting grooves distributed in the circumferential direction are formed in the fixing frames, and the limiting blocks are in limiting fit with the limiting grooves;
The second elastic elements are multiplied by the number of the sliding frames and are respectively arranged between the adjacent limiting blocks and the adjacent sliding frames;
And the reset components are the same as the sliding frames in number and are respectively arranged on the adjacent sliding frames and used for releasing the limit of the adjacent limiting blocks and the limiting grooves.
As a preferred technical solution of the present invention, the reset assembly includes:
The trigger plate is provided with two trigger plates which are respectively connected with the two sides of the sliding frame in a sliding way;
the extrusion blocks are the same as the trigger plates in number and are fixedly connected to the adjacent trigger plates;
The pushing blocks are fixedly connected to the limiting blocks, and the two extruding blocks are in extrusion fit with the adjacent pushing blocks.
The device has the beneficial effects that 1, by changing the joint position of the auxiliary magnetic ring and the main magnetic ring, the superposition state of the main magnetic ring and the auxiliary magnetic ring is formed on one side of the main magnetic ring, which is close to an external electric element, so that the resistance to an external interference magnetic field is improved, and the current detection precision of the device is improved.
2. The magnetic field intensity is concentrated and guided through the auxiliary magnetic ring, the external magnetic field intensity is dispersed, the penetration depth of an external magnetic field is reduced, meanwhile, the transformation of a magnetic field path is smoother, the abrupt change effect of the magnetic field is reduced, the uniformity and the stability of the magnetic field are further improved, and the resistance to the external magnetic field interference is further improved.
3. The high-frequency electromagnetic signals on the coil inlet and outlet wires are absorbed through the stable magnetic ring, and meanwhile, the two windings and the stable magnetic ring are matched to form two inductors which can be used as filter inductors, so that the high-frequency electromagnetic signals are further absorbed, and the detection precision of the device is further improved.
4. Through carriage and mount interlocking, avoid the vibration that produces when the electrical components in the switch board moves, lead to the carriage to take place relative motion along the mount, lead to vice magnetic ring and main magnetic ring's laminating position to change, and then reduce the detection accuracy of this device.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of a perspective structure of a housing of the present invention;
FIG. 3 is a schematic perspective view of the adjusting shaft and outer ring of the present invention;
FIG. 4 is a schematic cross-sectional view of the outer ring and inner ring of the present invention;
FIG. 5 is a schematic perspective view of a piston shaft according to the present invention;
FIG. 6 is a schematic perspective view of a second resilient element and trigger plate of the present invention;
Fig. 7 is a schematic cross-sectional view of a three-dimensional structure of a carriage of the present invention.
The drawing shows that the device comprises a 1-shell, a 2-port, a 3-coil, a 4-main magnetic ring, a 5-fixing frame, a 6-sliding frame, a 7-auxiliary magnetic ring, an 8-stabilizing magnetic ring, a 9-winding wire, a 201-adjusting shaft, a 202-outer ring, a 203-inner ring, a 204-piston shaft, a 205-first elastic element, a 206-gear, a 207-toothed ring, a 301-limiting block, a 302-limiting groove, a 303-second elastic element, a 304-triggering plate, a 305-extruding block and a 306-pushing block.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description, but does not limit the scope of protection and the application of the invention.
The existing current transformer resists external electromagnetic interference by arranging magnetic rings on two sides of windings, however, in a power distribution cabinet, certain high-power electrical components can generate high-frequency electromagnetic interference under the conditions of switch opening and closing operation, system short circuit and the like, the high-frequency electromagnetic interference has the characteristics of high frequency, steep wave front and high amplitude, and the simple magnetic rings can not effectively resist the electromagnetic interference, so that damage is caused to winding equipment such as the current transformer, and the measurement accuracy of the transformer is reduced.
A current transformer for inhibiting electromagnetic interference by adopting a high-frequency magnetic ring method is shown in fig. 1-4 and comprises a shell 1, two ports 2, a coil 3, a main magnetic ring 4, a fixing frame 5, a stabilizing component, a driving component and a driving component, wherein the two ports are fixedly connected with and penetrate through the shell 1, the coil 3 is fixedly connected with the inside of the shell 1, the main magnetic ring 4 is provided with two ports and is fixedly connected with the inside of the shell 1 and is respectively distributed on two sides of the coil 3, the fixing frame 5 is fixedly connected with the inside of the shell 1, the fixing frame 5 is connected with a plurality of sliding frames 6 in a sliding manner, the sliding frames 6 are fixedly connected with two auxiliary magnetic rings 7, the auxiliary magnetic rings 7 are attached to the adjacent main magnetic rings 4, the stabilizing component is arranged in the shell 1 and is used for stabilizing conversion current of the coil 3, the driving component is arranged in the shell 1 and is used for changing attachment positions of the auxiliary magnetic rings 7 and the main magnetic rings 4, the inner diameter of the coil 3 is smaller than the outer diameter of the main magnetic rings 4, the outer diameter of the auxiliary magnetic rings 7 is continuously wavy, the outer parts of the auxiliary magnetic rings 7 are continuously wavy magnetic rings are respectively distributed on two sides of the coil 7, continuous arc surfaces are continuously wavy surfaces, and the crest peaks of the outer wavy magnetic surfaces of the auxiliary magnetic rings are gradually reduced from the middle to the two ends are continuously wavy magnetic ring.
In the above scheme, the shell 1 is made of transparent insulating materials, so that workers can observe the position of the inner auxiliary magnetic ring 7 conveniently, meanwhile, insulating gas is filled in the shell 1 to prevent arc discharge and short circuit, the insulating gas can be sulfur hexafluoride, nitrogen and carbon dioxide, the number of electric wires wound on the coil 3 is an integral multiple of 10, so that electrorheological detection and calculation are convenient, the materials of the main magnetic ring 4 and the auxiliary magnetic ring 7 are magnetic materials with high magnetic permeability and good high-frequency characteristics and difficult saturation, such as ferrite magnetic rings, the materials of the fixing frame 5 and the sliding frame 6 are all light insulating materials, so that current leakage is avoided, meanwhile, the weight of the device is reduced, the load of the device during fixing is reduced, the number of the sliding frames 6 can be correspondingly changed according to actual conditions, further, the detection precision of the device is improved, the inner diameter of the coil 3 is smaller than the inner diameter of the main magnetic ring 4, the outer diameter of the coil 3 is larger than the outer diameter of the main magnetic ring 4, magnetic field lines generated by the coil 3 cover the two main magnetic rings 4, the main magnetic rings 4 are convenient to improve the magnetic field strength of the coil 3, the bonding position of the auxiliary magnetic ring 7 and the main magnetic ring 4 is made of the magnetic rings, the bonding position of the auxiliary magnetic ring 7 and the magnetic rings is made to be close to one side of the auxiliary magnetic ring 7 and the magnetic rings 7 and the magnetic rings are formed by the magnetic rings, and the superposition state of the auxiliary magnetic ring 7 and the magnetic ring is formed between the magnetic ring and the magnetic ring is located between the magnetic ring and the magnetic ring 4 and the magnetic ring is formed by the magnetic ring and the magnetic ring 4 and the magnetic ring device has high resistance device and the magnetic device has the magnetic interference resistance device.
Specifically, as shown in fig. 2, the stabilizing assembly comprises a stabilizing magnetic ring 8 fixedly connected to the inside of the casing 1, two windings 9, which are wound around and symmetrically distributed on the stabilizing magnetic ring 8, wherein one ends of the two windings 9 are respectively electrically connected with two ends of a cable on the coil 3, and the other ends of the two windings 9 are respectively electrically connected with the two ports 2.
In the scheme, the material of the stable magnetic ring 8 is the same as that of the main magnetic ring 4, the two windings 9 are two independent coils with the same winding number and winding method, the wires on the coil 3 and the wires of the windings 9 are enameled wires, and the stable magnetic ring has high insulating property and conductivity, high mechanical strength and corrosion resistance.
Specifically, as shown in fig. 2-5, the driving assembly comprises an adjusting shaft 201, an outer ring 202, an inner ring 203 and a pushing assembly, wherein the adjusting shaft 201 is slidably and rotatably connected to the housing 1, the adjusting shaft 201 penetrates through the housing 1, the outer ring 202 is fixedly connected to the inside of the housing 1, the adjusting shaft 201 is in sealed sliding connection with the outer ring 202, the inner ring 203 is in sealed and rotatable connection with the inside of the outer ring 202, and the inner ring and the outer ring are matched to form a closed cavity, and the pushing assembly is arranged on the adjusting shaft 201 and used for driving a plurality of sliding frames 6 to slide around the fixed frame 5.
In the above scheme, the material of the adjusting shaft 201 is an insulating light material, so as to avoid current leakage, and the sealed cavity formed by the outer ring 202 and the inner ring 203 is filled with hydraulic oil for improving the heat dissipation rate inside the device.
Specifically, as shown in fig. 2-5, the pushing assembly comprises a piston shaft 204, a gear 206, a toothed ring 207, a gear 206 and a gear 206, wherein the piston shaft 204 is connected in the inner ring 203 in a sealing sliding manner, the piston shaft 204 is in contact fit with the sliding frame 6, a first elastic element 205 is arranged between the piston shaft 204 and the inner ring 203, the gear 206 is fixedly connected to the adjusting shaft 201 and is positioned in the shell 1, the gear 207 is fixedly connected to the inner ring 203, the gear 206 is meshed with the toothed ring 207, and the thickness of the toothed ring 207 is larger than that of the gear 206, so that the two are always in a butt joint state.
In the above-mentioned scheme, the piston shaft 204 is initially in a state of not extending out, the first elastic element 205 is a spring for driving the piston shaft 204 to reset, the gear 206 and the toothed ring 207 are made of insulating lightweight materials, and the position of the plurality of sliding frames 6 is adjusted by pressing and rotating the adjusting shaft 201 by workers, so that the operation is simple and convenient, and the installation speed of the device is improved by workers.
When the staff needs to install the device in the switch board and detect the size of electric current in the cable, will wait to detect the cable and pass in the hole at this device middle part this moment, then install the device on the specific position of switch board, and make two ports 2 dock with outside current detection device, and then detect the numerical value of electric current in the cable (the detection principle is current transformer's basic theory of operation, do not make too much description here), in this device during the use, because there are a plurality of electrical components in the switch board, electrical components can produce the magnetic field, interfere with the produced magnetic field of this device, lead to this device to detect the data inaccurately.
When the device is installed, a worker adjusts the positions of all auxiliary magnetic rings 7 according to the distribution positions of electric elements in a power distribution cabinet, the worker presses the adjusting shaft 201, the adjusting shaft 201 pushes the outer ring 202 to be matched with the inner ring 203 to form hydraulic oil in a closed cavity, the hydraulic oil in the closed cavity pushes the piston shaft 204 by extrusion force, meanwhile, the first elastic element 205 compresses, then the worker rotates the adjusting shaft 201, the adjusting shaft 201 rotates and drives a gear 206 on the adjusting shaft 201 to synchronously rotate, the gear 206 drives the inner ring 203 to synchronously rotate through the toothed ring 207, at this time, the inner ring 203 drives the piston shaft 204 in the adjusting shaft to synchronously rotate until the piston shaft 204 contacts with the adjacent sliding frame 6, at this time, the worker continues to rotate the adjusting shaft 201, the piston shaft 204 drives the adjacent sliding frame 6 to synchronously rotate, the sliding frame 6 drives the two auxiliary magnetic rings 7 on the sliding frame 6 to synchronously rotate, the two auxiliary magnetic rings 7 are changed to be attached to the adjacent main magnetic ring 4 until the highest peak of the auxiliary magnetic ring 7 faces any electric element outside, then the worker stops pressing the adjusting shaft 201, at the moment, the first elastic element 205 drives the piston shaft 204 to reset, at the moment, the worker continues to rotate the adjusting shaft 201, the inner ring 203 is further driven to rotate, the piston shaft 204 is further driven to bypass the sliding frame 6 which is completed by the current adjustment, then the worker presses the adjusting shaft 201 again, the steps are repeated, the circulation is repeated until all the auxiliary magnetic rings 7 are completed by adjusting, then the pressing and rotating of the adjusting shaft 201 are stopped, one side of the main magnetic ring 4 close to the external electric element forms an overlapped state with the auxiliary magnetic ring 7 by changing the attached position of the auxiliary magnetic ring 7 and the main magnetic ring 4, the resistance to the external interference magnetic field is increased, the current detection precision of the device is improved.
When the magnetic field emitted by an external interference source impacts the magnetic field generated by the device, the magnetic field intensity at the peak of the auxiliary magnetic ring 7 is high, the magnetic field intensity can be more effectively concentrated and guided, the external magnetic field intensity is dispersed, the penetration depth of an external magnetic field is reduced, meanwhile, the height of the peak is gradually reduced from the middle part to two sides of the auxiliary magnetic ring 7, the transformation of a magnetic field path is smoother, the abrupt change effect of the magnetic field is reduced, the uniformity and the stability of the magnetic field are further improved, the resistance to the external magnetic field interference is further improved, the detection precision of the device is improved, meanwhile, the wave-shaped structure increases the external area of the auxiliary magnetic ring 7, the heat dissipation rate is improved, and the heat accumulation caused by the magnetic loss is reduced.
During the detection of the device, the current generated by the cable on the coil 3 flows to the winding 9 of the stable magnetic ring 8, at the moment, the two ends of the inlet and outlet wires of the coil 3 are wound outside the stable magnetic ring 8, so that the high-frequency electromagnetic signals generated by the inlet and outlet wires and the external current detection device are absorbed by the stable magnetic ring 8, and meanwhile, the two windings 9 and the stable magnetic ring 8 are matched to form two inductors which can be used as filter inductors, so that the high-frequency electromagnetic signals are further absorbed, and the detection precision of the device is further improved.
In a further embodiment, as shown in fig. 5-7, the device further comprises a locking component arranged on the fixed frame 5 and used for locking all the sliding frames 6 on the fixed frame 5, wherein the locking component comprises limiting blocks 301, the number of which is the same as that of the sliding frames 6, and the limiting blocks are respectively connected to the adjacent sliding frames 6 in a sliding manner, limiting grooves 302 distributed in the circumferential direction are arranged on the fixed frame 5, the limiting blocks 301 are in limiting fit with the limiting grooves 302, second elastic elements 303 are arranged between the adjacent limiting blocks 301 and the adjacent sliding frames 6 in a multiple manner and are respectively arranged between the adjacent limiting blocks 301 and the adjacent sliding frames 6, and reset components, the number of which is the same as that of the sliding frames 6, are arranged on the adjacent sliding frames 6 and used for releasing the limiting of the adjacent limiting blocks 301 and the limiting grooves 302.
In the above scheme, the limiting block 301 is in a rectangular structure, the limiting grooves 302 are rectangular grooves and mutually attached to the limiting block 301, the locking precision of the sliding frame 6 is improved, the limiting grooves 302 on the fixing frame 5 are distributed at equal intervals in the circumferential direction, the number of the limiting grooves 302 can be adjusted according to actual conditions, the locking precision of the position change of the sliding frame 6 is improved, the second elastic element 303 is a spring and used for driving the adjacent limiting blocks 301 to reset, and the number can be adjusted according to the actual conditions.
Specifically, as shown in fig. 5-7, the reset assembly includes two trigger plates 304 slidably connected to two sides of the carriage 6, extrusion blocks 305, the same as the trigger plates 304 in number, fixedly connected to adjacent trigger plates 304, push blocks 306 fixedly connected to the limiting blocks 301, and both extrusion blocks 305 are in extrusion fit with adjacent push blocks 306.
In the above scheme, the trigger plate 304, the extrusion block 305 and the pushing block 306 are made of the same material as the sliding frame 6, the extrusion block 305 has inclined surfaces, the pushing block 306 has symmetrically distributed inclined surfaces, and the two inclined surfaces of the pushing block 306 are respectively attached to the inclined surfaces of the two extrusion blocks 305, so that the piston shaft 204 can release the locking state of the sliding frame 6 and the fixing frame 5 at both sides of the sliding frame 6, the operation convenience of the staff is improved, and the installation speed of the staff to the device is improved.
When the adjusting shaft 201 pushes the sliding frame 6 to change the positions of two adjacent auxiliary magnetic rings 7, the adjusting shaft 201 is preferentially contacted with the adjacent trigger plates 304, at this time, the piston shaft 204 pushes the adjacent trigger plates 304 to slide along the sliding frame 6, the trigger plates 304 drive the adjacent extrusion blocks 305 to synchronously move, the extrusion blocks 305 extrude the adjacent pushing blocks 306, at this time, the pushing blocks 306 are driven by extrusion force to drive the limiting blocks 301 to slide along the sliding frame 6, the limiting blocks 301 are separated from the adjacent limiting grooves 302, the locking state of the sliding frame 6 and the fixed frame 5 is released, meanwhile, the second elastic element 303 compresses, then the staff rotates the adjusting shaft 201, the adjusting shaft 201 drives the inner ring 203 to rotate through the gears 206 and the toothed rings 207, and after the inner ring 203 slides the sliding frame 6 to a required position through the piston shaft 204, at this time, the worker stops pressing the adjusting shaft 201, at this time, the first elastic element 205 drives the piston shaft 204 to reset, so that the piston shaft 204 is separated from the trigger plate 304, at this time, the second elastic element 303 resets and pushes the limiting block 301 to reset and slide along the sliding frame 6, the limiting block 301 extrudes the adjacent extrusion block 305 through the pushing block 306 on the limiting block, so that the extrusion block 305 drives the adjacent trigger plate 304 to reset to the initial state, and meanwhile, the limiting block 301 is in butt joint with the adjacent limiting groove 302, so that the sliding frame 6 and the fixed frame 5 are locked with each other, vibration generated when the electric elements in the power distribution cabinet are operated is avoided, the sliding frame 6 moves relatively along the fixed frame 5, the attaching position of the auxiliary magnetic ring 7 and the main magnetic ring 4 is changed, and the detection precision of the device is reduced.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411764951.6A CN119400570B (en) | 2024-12-04 | 2024-12-04 | A current transformer using high-frequency magnetic ring method to suppress electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411764951.6A CN119400570B (en) | 2024-12-04 | 2024-12-04 | A current transformer using high-frequency magnetic ring method to suppress electromagnetic interference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119400570A CN119400570A (en) | 2025-02-07 |
| CN119400570B true CN119400570B (en) | 2025-06-03 |
Family
ID=94432211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411764951.6A Active CN119400570B (en) | 2024-12-04 | 2024-12-04 | A current transformer using high-frequency magnetic ring method to suppress electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119400570B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1185646A (en) * | 1995-09-19 | 1998-06-24 | 株式会社日立制作所 | Earth Leakage Circuit Breaker |
| CN108133817A (en) * | 2017-12-11 | 2018-06-08 | 成都金采科技有限公司 | A kind of current transformer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06267396A (en) * | 1993-03-16 | 1994-09-22 | Hitachi Ltd | Zero-phase current transformer |
| JP2000349489A (en) * | 1999-06-02 | 2000-12-15 | Ricoh Co Ltd | Ferrite core used for electronic equipment |
| EP2423693B1 (en) * | 2010-08-24 | 2020-02-26 | LEM International SA | Toroidal current transducer |
| CN221573669U (en) * | 2023-12-29 | 2024-08-20 | 厦门伊科电子有限公司 | Amorphous heavy-current anti-interference magnetic ring inductor |
-
2024
- 2024-12-04 CN CN202411764951.6A patent/CN119400570B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1185646A (en) * | 1995-09-19 | 1998-06-24 | 株式会社日立制作所 | Earth Leakage Circuit Breaker |
| CN108133817A (en) * | 2017-12-11 | 2018-06-08 | 成都金采科技有限公司 | A kind of current transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119400570A (en) | 2025-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11923127B2 (en) | Method and device for insulation of high-voltage generator tank | |
| EP2809138B1 (en) | Immersion cooled motor controller | |
| US12046409B2 (en) | Transformer and switch-mode power supply | |
| JP5709283B2 (en) | Transformer | |
| CN108292552B (en) | Magnetic structures with self-closing magnetic circuits | |
| EP2924842A1 (en) | Coil unit and wireless power transmission device | |
| CN119400570B (en) | A current transformer using high-frequency magnetic ring method to suppress electromagnetic interference | |
| KR20180062388A (en) | An inductive device | |
| US7265648B2 (en) | Composite core nonlinear reactor and induction power receiving circuit | |
| CN119181578A (en) | Three-phase dry-type transformer | |
| US20140063864A1 (en) | Electronic device | |
| CN113314317B (en) | High-power hybrid magnetic circuit medium-high frequency transformer | |
| CN215007883U (en) | High-power hybrid magnetic circuit medium-high frequency transformer | |
| CN217157915U (en) | Filter inductor and filter | |
| CN205178886U (en) | Sensor is kept apart to electric quantity | |
| CN202285185U (en) | Common mode inductor and filter | |
| CN224067536U (en) | Voltage transformer with shielding structure | |
| CN222813407U (en) | A mutual inductor and electrical equipment | |
| CN223296602U (en) | Differential-common mode integrated inductor with adjustable inductance and EMI filter | |
| CN223941641U (en) | An integrated planar transformer | |
| CN219105900U (en) | Transformer coil positioning assembly | |
| CN221379102U (en) | Protective component and combined transformer | |
| CN221150698U (en) | Electrical insulation cabinet | |
| CN120221243B (en) | Composite winding structure of multilayer stacked 5S inductor | |
| CN223871299U (en) | A high-sealing transformer casing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |