A current transformer that suppresses electromagnetic interference by using the high-frequency magnetic ring method

Abstract

The present invention relates to the technical field of current transformers, and particularly to a current transformer that uses a high-frequency magnetic ring method to suppress electromagnetic interference. An outer shell; ports, having two, both fixedly connected and penetrating through the outer shell; a coil, fixedly connected to the interior of the outer shell; main magnetic rings, having two, both fixedly connected to the interior of the outer shell, respectively distributed on both sides of the coil; a fixing frame, fixedly connected to the interior of the outer shell, the fixing frame is slidably connected with a plurality of sliding frames, the sliding frames are fixedly connected with two auxiliary magnetic rings, and the auxiliary magnetic rings are attached to the adjacent main magnetic rings; a stabilizing component, arranged in the outer shell; a driving component, arranged in the outer shell. By changing the attachment position of the auxiliary magnetic ring and the main magnetic ring, the present invention forms a superimposed state with the auxiliary magnetic ring on the side of the main magnetic ring close to the external electrical components, increasing the resistance to the external interference magnetic field and improving the detection accuracy of the current of the device.

Description

Technical Field

[0001] 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. Background Art

[0002] A current transformer is a device used to measure and protect the current in a circuit. It converts a large current into a small current, enabling measuring instruments and protection devices to operate safely and accurately. The current transformer works based on the principle of electromagnetic induction. When a large current passes through the primary winding, a magnetic field is generated, and this magnetic field induces a small current in the secondary winding. The turns ratio of the primary winding and the secondary winding determines the current transformation ratio, thereby converting the large current in the measurement cable into a small current. Most existing current transformers are installed in distribution cabinets to measure various data of the distribution cabinets. However, due to the presence of a large number of electrical components in the distribution cabinet, these electrical components will generate a magnetic field that interferes with the current transformer. Existing current transformers place magnetic rings on both sides of the coil to resist external electromagnetic interference. However, when certain high-power electrical components in the distribution cabinet perform operations such as switch closing and system short circuit, high-frequency electromagnetic interference is generated. This high-frequency electromagnetic interference has characteristics such as high frequency, steep wavefront, and high amplitude. Simple magnetic rings cannot effectively resist such electromagnetic interference, which will harm winding devices such as current transformers and reduce the measurement accuracy of the transformer. Summary of the Invention

[0003] In order to overcome the disadvantages mentioned in the above background art, the present invention provides a current transformer that uses a high-frequency magnetic ring method to suppress electromagnetic interference.

[0004] Technical Solution: A current transformer that uses a high-frequency magnetic ring method to suppress electromagnetic interference, comprising:

[0005] A housing;

[0006] Ports, there are two of them, both fixedly connected and passing through the housing;

[0007] A coil, fixedly connected inside the housing;

[0008] Main magnetic rings, there are two of them, both fixedly connected inside the housing and distributed on both sides of the coil respectively;

[0009] A fixing frame, fixedly connected inside the housing. The fixing frame is slidably connected with a plurality of sliding frames, and two secondary magnetic rings are fixedly connected to the sliding frames. The secondary magnetic rings are in contact with the adjacent main magnetic rings;

[0010] A stabilizing component, arranged inside the housing, for stabilizing the converted current of the coil;

[0011] The driving component is arranged inside the housing and is used to change the fitting position between the secondary magnetic ring and the primary magnetic ring.

[0012] As a preferred technical solution of the present invention, the stabilizing component includes:

[0013] A stabilizing magnetic ring fixedly connected to the inside of the housing;

[0014] There are two winding wires wound symmetrically on the stabilizing magnetic ring. One end of each of the two winding wires is electrically connected to both ends of the cable on the coil respectively, and the other end of each of the two winding wires is electrically connected to the two ports respectively.

[0015] As a preferred technical solution of the present invention, the inner diameter of the coil is smaller than the inner diameter of the primary magnetic ring, and the outer diameter of the coil is larger than the outer diameter of the primary magnetic ring.

[0016] As a preferred technical solution of the present invention, the outer part of the secondary magnetic ring is a continuous wavy arc surface, and continuous arc surfaces are provided on both sides of the secondary magnetic ring.

[0017] As a preferred technical solution of the present invention, the wave crests of the outer wavy arc surface of the secondary magnetic ring gradually decrease in height from the middle to both ends, so as to continuously change the magnetic field intensity.

[0018] As a preferred technical solution of the present invention, the driving component includes:

[0019] An adjusting shaft is slidably and rotatably connected to the housing, and the adjusting shaft penetrates through the housing;

[0020] An outer ring is fixedly connected to the inside of the housing, and the adjusting shaft is in sealed sliding connection with the outer ring;

[0021] An inner ring is in sealed rotational connection with the inside of the outer ring, and the two cooperate to form a sealed cavity;

[0022] A pushing component is arranged on the adjusting shaft and is used to drive a plurality of the sliding frames to slide around the fixed frame.

[0023] As a preferred technical solution of the present invention, the pushing component includes:

[0024] A piston shaft is in sealed sliding connection inside the inner ring. The piston shaft is in contact and cooperation with the sliding frame, and a first elastic element is arranged between the piston shaft and the inner ring;

[0025] A gear is fixedly connected to the adjusting shaft and is located inside the housing;

[0026] A toothed ring is fixedly connected to the inner ring, and the gear meshes with the toothed ring.

[0027] As a preferred technical solution of the present invention, the thickness of the gear ring is greater than the thickness of the gear, so as to keep the two in a butting state all the time.

[0028] As a preferred technical solution of the present invention, it further includes:

[0029] A locking assembly, which is arranged on the fixed frame and is used to lock all the sliding frames to the fixed frame. The locking assembly includes:

[0030] Limit blocks, the number of which is the same as that of the sliding frames, are respectively slidably connected to adjacent sliding frames. Circumferentially distributed limit grooves are arranged on the fixed frame, and the limit blocks are in limit fit with the limit grooves;

[0031] Second elastic elements, the number of which is a multiple of the number of sliding frames, are respectively arranged between adjacent limit blocks and adjacent sliding frames;

[0032] A reset assembly, the number of which is the same as that of the sliding frames, is respectively arranged on adjacent sliding frames and is used to release the limit between adjacent limit blocks and the limit grooves.

[0033] As a preferred technical solution of the present invention, the reset assembly includes:

[0034] Trigger plates, there are two of them, which are respectively slidably connected to both sides of the sliding frame;

[0035] Extrusion blocks, the number of which is the same as that of the trigger plates, are fixedly connected to adjacent trigger plates;

[0036] Push blocks, which are fixedly connected to the limit blocks, and both of the two extrusion blocks are in extrusion fit with the adjacent push blocks.

[0037] Beneficial effects: 1. By changing the fitting position of the secondary magnetic ring and the primary magnetic ring, a superposition state with the secondary magnetic ring is formed on the side of the primary magnetic ring close to the external electrical components, increasing the resistance to the external interference magnetic field and improving the detection accuracy of the current of the present device.

[0038] 2. By concentrating and guiding the magnetic field intensity of the secondary magnetic ring and dispersing the external magnetic field intensity, the penetration depth of the external magnetic field is reduced. At the same time, the transformation of the magnetic field path is made smoother, reducing the sudden change effect of the magnetic field, thereby improving the uniformity and stability of the magnetic field and further increasing the resistance to the external magnetic field interference.

[0039] 3. By the stable magnetic ring absorbing the high-frequency electromagnetic signals on the incoming and outgoing lines of the coil, and at the same time, the two windings and the stable magnetic ring cooperate to form two inductors, which can be used as filter inductors to further absorb the high-frequency electromagnetic signals, thereby improving the detection accuracy of the present device.

[0040] 4. By locking the sliding frame and the fixed frame with each other, vibrations generated during the operation of electrical components in the power distribution cabinet are avoided, preventing the sliding frame from moving relative to the fixed frame, which could change the fitting position between the secondary magnetic ring and the primary magnetic ring, thereby reducing the detection accuracy of this device. Description of the Drawings

[0041] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0042] Figure 2 It is a three-dimensional structural sectional view of the outer shell of the present invention;

[0043] Figure 3 It is a three-dimensional structural schematic diagram of the adjusting shaft and the outer ring of the present invention;

[0044] Figure 4 It is a three-dimensional structural sectional view of the outer ring and the inner ring of the present invention;

[0045] Figure 5 It is a three-dimensional structural schematic diagram of the piston shaft of the present invention;

[0046] Figure 6 It is a three-dimensional structural schematic diagram of the second elastic element and the trigger plate of the present invention;

[0047] Figure 7 It is a three-dimensional structural sectional view of the sliding frame of the present invention.

[0048] The labels in the figure are: 1 - outer shell, 2 - port, 3 - coil, 4 - primary magnetic ring, 5 - fixed frame, 6 - sliding frame, 7 - secondary magnetic ring, 8 - stable magnetic ring, 9 - winding, 201 - adjusting shaft, 202 - outer ring, 203 - inner ring, 204 - piston shaft, 205 - first elastic element, 206 - gear, 207 - toothed ring, 301 - limiting block, 302 - limiting groove, 303 - second elastic element, 304 - trigger plate, 305 - extrusion block, 306 - pushing block. Detailed Embodiment

[0049] The following further describes the present invention in detail in conjunction with the drawings and specific embodiments, but does not limit the protection scope and application scope of the present invention.

[0050] Existing current transformers resist external electromagnetic interference by placing magnetic rings on both sides of the winding. However, in a power distribution cabinet, certain high-power electrical components will generate high-frequency electromagnetic interference during operations such as switch closing and opening, system short circuits, etc. This high-frequency electromagnetic interference has the characteristics of high frequency, steep wavefront, and high amplitude. Simple magnetic rings cannot effectively resist such electromagnetic interference, which can harm winding devices such as current transformers and reduce the measurement accuracy of the transformers.

[0051] A current transformer that suppresses electromagnetic interference using the high-frequency magnetic ring method, as Figures 1-4 shown, includes: a housing 1; two ports 2, both fixedly connected and penetrating through the housing 1; a coil 3 fixedly connected inside the housing 1; two main magnetic rings 4, both fixedly connected inside the housing 1, respectively distributed on both sides of the coil 3; a fixing frame 5 fixedly connected inside the housing 1, the fixing frame 5 is slidably connected with a plurality of sliding frames 6, the sliding frames 6 are fixedly connected with two auxiliary magnetic rings 7, and the auxiliary magnetic rings 7 are attached to the adjacent main magnetic rings 4; a stabilizing component arranged inside the housing 1 for stabilizing the converted current of the coil 3; a driving component arranged inside the housing 1 for changing the attaching position of the auxiliary magnetic ring 7 and the main magnetic ring 4; the inner diameter of the coil 3 is smaller than the inner diameter of the main magnetic ring 4, and the outer diameter of the coil 3 is larger than the outer diameter of the main magnetic ring 4; the outer part of the auxiliary magnetic ring 7 is a continuous wavy arc surface, and continuous arc surfaces are arranged on both sides of the auxiliary magnetic ring 7; the wave peaks of the outer wavy arc surface of the auxiliary magnetic ring 7 gradually decrease in height from the middle to both ends, for continuously changing the magnetic field intensity.

[0052] In the above solution, the housing 1 is made of a transparent insulating material, which is convenient for the staff to observe the position of the internal auxiliary magnetic ring 7. At the same time, the inside of the housing 1 is filled with an insulating gas to prevent arc discharge and short-circuit phenomena. The insulating gas can be sulfur hexafluoride, nitrogen, and carbon dioxide. The number of turns of the electric coil wound on the coil 3 is an integer multiple of 10, which is convenient for the detection and calculation of current transformation. The materials of the main magnetic ring 4 and the auxiliary magnetic ring 7 are magnetic materials with high magnetic permeability, good high-frequency characteristics, and not easy to saturate, such as ferrite magnetic rings. The materials of the fixing frame 5 and the sliding frame 6 are both lightweight insulating materials, which are used to avoid current leakage and reduce the weight of the device, and reduce the load when the device is fixed. The number of sliding frames 6 can be changed accordingly according to the actual situation, thereby improving the detection accuracy of the device. The inner diameter of the coil 3 is smaller than the inner diameter of the main magnetic ring 4, and the outer diameter of the coil 3 is larger than the outer diameter of the main magnetic ring 4, so that the magnetic field lines generated by the coil 3 cover the two main magnetic rings 4, which is convenient for the main magnetic ring 4 to increase the magnetic field intensity of the coil 3. By changing the attaching position of the auxiliary magnetic ring 7 and the main magnetic ring 4, a superposition state with the auxiliary magnetic ring 7 is formed on the side of the main magnetic ring 4 close to the external electrical component (making the auxiliary magnetic ring 7 located between the electrical component and the main magnetic ring 4, increasing the thickness of the main magnetic ring 4), increasing the resistance to the external interference magnetic field and improving the detection accuracy of the device for current.

[0053] Specifically, as Figure 2 shown, the stabilizing component includes: a stabilizing magnetic ring 8 fixedly connected inside the housing 1; two winding wires 9 wound and symmetrically distributed on the stabilizing magnetic ring 8, one ends of the two winding wires 9 are respectively electrically connected to the two ends of the cable on the coil 3, and the other ends of the two winding wires 9 are respectively electrically connected to the two ports 2.

[0054] In the above solution, the material of the stable magnetic ring 8 is the same as that of the main magnetic ring 4. The two winding wires 9 are two independent coils with the same number of turns and winding methods. The wires on the coil 3 and the winding wires 9 are both enameled wires, which have high insulation performance and electrical conductivity, and high mechanical strength and corrosion resistance.

[0055] Specifically, as Figures 2-5 shown, the driving assembly includes: an adjusting shaft 201, which is slidably and rotatably connected to the outer shell 1, and the adjusting shaft 201 penetrates the outer shell 1; an outer ring 202, which is fixedly connected to the inside of the outer shell 1, and the adjusting shaft 201 is hermetically slidably connected to the outer ring 202; an inner ring 203, which is hermetically rotatably connected to the inside of the outer ring 202, and the two cooperate to form a sealed cavity; a pushing assembly, which is arranged on the adjusting shaft 201 and is used to drive a plurality of sliding frames 6 to slide around the fixed frame 5.

[0056] In the above solution, the material of the adjusting shaft 201 is an insulating lightweight material to avoid current leakage. The sealed cavity formed by the cooperation of the outer ring 202 and the inner ring 203 is filled with hydraulic oil to improve the heat dissipation rate inside the device.

[0057] Specifically, as Figures 2-5 shown, the pushing assembly includes: a piston shaft 204, which is hermetically slidably connected to the inner ring 203, the piston shaft 204 is in contact and cooperation with the sliding frame 6, and a first elastic element 205 is arranged between the piston shaft 204 and the inner ring 203; a gear 206, which is fixedly connected to the adjusting shaft 201 and is located inside the outer shell 1; a toothed ring 207, which is fixedly connected to the inner ring 203, and the gear 206 meshes with the toothed ring 207; the thickness of the toothed ring 207 is greater than the thickness of the gear 206 to keep the two in a butting state all the time.

[0058] In the above solution, the piston shaft 204 is initially in a non-protruding state, and the first elastic element 205 is a spring, which is used to drive the piston shaft 204 to reset. The materials of the gear 206 and the toothed ring 207 are both insulating lightweight materials. The operator can adjust the positions of the plurality of sliding frames 6 by pressing and rotating the adjusting shaft 201, which is simple to operate and improves the installation speed of the operator for this device.

[0059] When the operator needs to install this device in the power distribution cabinet to detect the magnitude of the current in the cable, at this time, the cable to be detected is passed through the hole in the middle of this device, and then this device is installed at a specific position in the power distribution cabinet, and the two ports 2 are docked with the external current detection device, so as to detect the value of the current in the cable (the detection principle is the basic working principle of the current transformer, which will not be elaborated here). During the use of this device, since there are several electrical components in the power distribution cabinet, the electrical components will generate a magnetic field, which will interfere with the magnetic field generated by this device, resulting in inaccurate detection data of this device.

[0060] When installing this device, the staff adjusts the positions of all the secondary magnetic rings 7 according to the distribution positions of the electrical components in the power distribution cabinet. The staff presses the adjusting shaft 201, so that the adjusting shaft 201 pushes the hydraulic oil in the sealed cavity formed by the cooperation of the outer ring 202 and the inner ring 203. At this time, the hydraulic oil in the sealed cavity is pushed by the extrusion force to drive the piston shaft 204, and at the same time, the first elastic element 205 is compressed. Then the staff rotates the adjusting shaft 201, so that the adjusting shaft 201 rotates and drives the gear 206 on it to rotate synchronously, so that the gear 206 drives the inner ring 203 to rotate synchronously through the toothed ring 207. At this time, the inner ring 203 drives the piston shaft 204 inside it to rotate synchronously. In this way, until the piston shaft 204 contacts the adjacent sliding frame 6. At this time, the staff continues to rotate the adjusting shaft 201, so that the piston shaft 204 drives the adjacent sliding frame 6 to rotate synchronously. The sliding frame 6 drives the two secondary magnetic rings 7 on it to rotate synchronously, so that the two secondary magnetic rings 7 change the fitting positions with the adjacent main magnetic rings 4. In this way, until the highest peak of the secondary magnetic ring 7 faces any electrical component outside. Then the staff stops pressing the adjusting shaft 201. At this time, the first elastic element 205 drives the piston shaft 204 to reset. At this time, the staff continues to rotate the adjusting shaft 201, so that the inner ring 203 continues to rotate, and then drives the piston shaft 204 to bypass the currently adjusted sliding frame 6. Then the staff presses the adjusting shaft 201 again and repeats the above steps. In this way, the cycle continues until all the secondary magnetic rings 7 are adjusted. Then stop pressing and rotating the adjusting shaft 201. By changing the fitting positions of the secondary magnetic rings 7 and the main magnetic rings 4, a superposition state with the secondary magnetic rings 7 is formed on the side of the main magnetic rings 4 close to the external electrical components, increasing the resistance to the external interference magnetic field and improving the detection accuracy of the current of this device.

[0061] When the magnetic field emitted by the external interference source impacts the magnetic field generated by this device, the magnetic field intensity at the peak of the secondary magnetic ring 7 is high, which can more effectively concentrate and guide the magnetic field intensity, and disperse the external magnetic field intensity, reducing the penetration depth of the external magnetic field. At the same time, the height of the peak gradually decreases from the middle to both sides of the secondary magnetic ring 7, making the transformation of the magnetic field path smoother, reducing the mutation effect of the magnetic field, and further improving the uniformity and stability of the magnetic field, further increasing the resistance to the external magnetic field interference and improving the detection accuracy of this device. At the same time, the wavy structure increases the external area of the secondary magnetic ring 7, improving the heat dissipation rate and reducing the heat accumulation caused by magnetic loss.

[0062] During the detection of this device, the current generated by the cable on the coil 3 will flow to the winding 9 of the stable magnetic ring 8. At this time, both ends of the incoming and outgoing lines of the coil 3 are wound around the outside of the stable magnetic ring 8, so that the high-frequency electromagnetic signals generated by the incoming and outgoing lines and the external current detection device are absorbed by the stable magnetic ring 8. At the same time, the two windings 9 and the stable magnetic ring 8 cooperate to form two inductances that can be used as filter inductances to further absorb the high-frequency electromagnetic signals, thereby improving the detection accuracy of this device.

[0063] In a further embodiment, as Figures 5-7 shown, it further includes: a locking assembly, disposed on the fixing frame 5, for locking all the sliding frames 6 to the fixing frame 5. The locking assembly includes: a limiting block 301, having the same number as the sliding frames 6, and respectively slidably connected to adjacent sliding frames 6. The fixing frame 5 is provided with circumferentially distributed limiting grooves 302, and the limiting block 301 is in limiting cooperation with the limiting grooves 302; a second elastic element 303, having a multiple of the number of the sliding frames 6, and respectively disposed between adjacent limiting blocks 301 and adjacent sliding frames 6; a reset assembly, having the same number as the sliding frames 6, disposed on adjacent sliding frames 6, for releasing the limit between adjacent limiting blocks 301 and the limiting grooves 302.

[0064] In the above solution, the limiting block 301 is of a rectangular structure, the shape of the limiting groove 302 is a rectangular groove, and it fits with the limiting block 301, improving the locking accuracy of the sliding frame 6. The limiting grooves 302 on the fixing frame 5 are circumferentially equally spaced, and the number of the limiting grooves 302 can be adjusted according to the actual situation to increase the locking accuracy of the position change of the sliding frame 6. The second elastic element 303 is a spring, used to drive the adjacent limiting blocks 301 to reset, and the number can be adjusted according to the actual situation.

[0065] Specifically, as Figures 5-7 shown, the reset assembly includes: two trigger plates 304, respectively slidably connected to both sides of the sliding frame 6; extrusion blocks 305, having the same number as the trigger plates 304, fixedly connected to the adjacent trigger plates 304; a pushing block 306, fixedly connected to the limiting block 301, and both extrusion blocks 305 are in extrusion cooperation with the adjacent pushing block 306.

[0066] In the above solution, the materials of the trigger plate 304, the extrusion block 305 and the pushing block 306 are the same as that of the sliding frame 6. The extrusion block 305 has an inclined surface, and the pushing block 306 has symmetrically distributed inclined surfaces. The two inclined surfaces of the pushing block 306 are respectively in contact with the inclined surfaces of the two extrusion blocks 305, so that the locking state between the piston shaft 204 and the fixing frame 5 can be released on both sides of the sliding frame 6, improving the operation convenience of the staff and the installation speed of the device by the staff.

[0067] When the adjusting shaft 201 pushes the sliding frame 6 to change the positions of two adjacent secondary magnetic rings 7, the adjusting shaft 201 preferentially contacts the adjacent trigger plate 304. At this time, the piston shaft 204 pushes the adjacent trigger plate 304 to slide along the sliding frame 6. The trigger plate 304 drives the adjacent extrusion block 305 to move synchronously, so that the extrusion block 305 extrudes the adjacent pushing block 306. At this time, the pushing block 306 drives the limiting block 301 to slide along the sliding frame 6 under the extrusion force. The limiting block 301 separates from the adjacent limiting groove 302, releasing the locking state between the sliding frame 6 and the fixed frame 5. At the same time, the second elastic element 303 is compressed. Then the staff rotates the adjusting shaft 201, so that the adjusting shaft 201 drives the inner ring 203 to rotate through the gear 206 and the toothed ring 207. After the inner ring 203 slides the sliding frame 6 to the required position through the piston shaft 204, at this time the staff 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 separates from the trigger plate 304. At this time, the second elastic element 303 resets and pushes the limiting block 301 to slide back along the sliding frame 6. The limiting block 301 extrudes the adjacent extrusion block 305 through the pushing block 306 thereon, so that the extrusion block 305 drives the adjacent trigger plate 304 to reset to the initial state. At the same time, the limiting block 301 is butted against the adjacent limiting groove 302, locking the sliding frame 6 and the fixed frame 5 to each other, avoiding the relative movement of the sliding frame 6 along the fixed frame 5 caused by the vibration generated when the electrical components in the power distribution cabinet are running, resulting in the change of the fitting position between the secondary magnetic ring 7 and the main magnetic ring 4, and thus reducing the detection accuracy of the device.

[0068] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A current transformer that uses a high-frequency magnetic ring method to suppress electromagnetic interference. Its characteristics include: Housing (1); There are two ports (2), both of which are fixedly connected and penetrate the housing (1); A coil (3) fixedly connected to the interior of the housing (1); There are two main magnetic rings (4), both of which are fixedly connected to the inside of the housing (1) and are respectively distributed on both sides of the coil (3); A fixed frame (5) is fixedly connected to the inside of the housing (1); the fixed frame (5) is slidably connected to a plurality of sliding frames (6); the sliding frames (6) are fixedly connected to two auxiliary magnetic rings (7); the auxiliary magnetic rings (7) are in contact with the adjacent main magnetic rings (4); A stabilizing component, disposed in the housing (1), and used to absorb high-frequency electromagnetic signals on the input and output lines of the coil (3); A drive assembly is arranged in the housing (1) and is used to change the fitting position of the auxiliary magnetic ring (7) and the main magnetic ring (4).

2. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 1, characterized in that: The stabilizing component comprises: A stabilizing magnetic ring (8) fixedly connected to the interior of the housing (1); The winding wires (9) have two ends, which are wound around and symmetrically distributed on the stabilizing magnetic ring (8), one end of the two winding wires (9) is electrically connected to the two ends of the cable on the coil (3), and the other end of the two winding wires (9) is electrically connected to the two ports (2).

3. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 2, characterized in that: The inner diameter of the coil (3) is smaller than the inner diameter of the main magnetic ring (4), and the outer diameter of the coil (3) is larger than the outer diameter of the main magnetic ring (4).

4. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 1, characterized in that: The exterior of the auxiliary magnetic ring (7) is a continuous wavy arc surface, and continuous arc surfaces are provided on both sides of the auxiliary magnetic ring (7).

5. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 4, characterized in that: The crests of the external wavy arc surface of the secondary magnetic ring (7) gradually decrease in height from the middle to both ends, so as to enable the magnetic field intensity to be continuously changed.

6. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 2, characterized in that: The drive assembly comprises: An adjustment shaft (201) is slidably and rotatably connected to the housing (1), and the adjustment shaft (201) passes through the housing (1); An outer ring (202) is fixedly connected to the interior of the housing (1), and the adjustment shaft (201) is sealingly and slidably connected to the outer ring (202); An inner ring (203) is sealingly rotatably connected to the interior of the outer ring (202), and the two cooperate to form a closed cavity; A pushing assembly is arranged on the adjusting shaft (201) and is used to drive the plurality of sliding frames (6) to slide around the fixing frame (5).

7. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 6, characterized in that: The pushing component comprises: A piston shaft (204) is sealingly and slidably connected in the inner ring (203); the piston shaft (204) is in contact with the sliding frame (6); and a first elastic element (205) is provided between the piston shaft (204) and the inner ring (203); A gear (206) fixedly connected to the adjusting shaft (201) and located inside the housing (1); The gear ring (207) is fixedly connected to the inner ring (203), and the gear (206) is meshed with the gear ring (207).

8. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 7, characterized in that: The thickness of the gear ring (207) is greater than the thickness of the gear (206), so that the two are always in a docking state.

9. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 7, characterized in that: Also included are: A locking assembly is arranged on the fixed frame (5) and is used to lock all the sliding frames (6) to the fixed frame (5), wherein the locking assembly comprises: The limiting blocks (301) are the same in number as the sliding frames (6) and are respectively slidably connected to adjacent sliding frames (6); the fixed frame (5) is provided with circumferentially distributed limiting grooves (302); the limiting blocks (301) are in limiting cooperation with the limiting grooves (302); The number of second elastic elements (303) is a multiple of the number of the sliding frames (6), and they are respectively arranged between adjacent limit blocks (301) and adjacent sliding frames (6); The reset components are the same in number as the sliding frames (6) and are respectively arranged on adjacent sliding frames (6) and are used to release the limiting of adjacent limiting blocks (301) and limiting grooves (302).

10. A current transformer for suppressing electromagnetic interference by using a high-frequency magnetic ring method according to claim 9, characterized in that: The reset component includes: The trigger plates (304) have two parts, which are slidably connected to two sides of the sliding frame (6) respectively; Extrusion blocks (305), the number of which is the same as the trigger plates (304), and which are fixedly connected to adjacent trigger plates (304); The pushing block (306) is fixedly connected to the limiting block (301), and the two extruding blocks (305) are extruded and matched with the adjacent pushing blocks (306).

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