Miniaturized broadband current transformer

Abstract

The application discloses a miniaturized broadband current transformer, comprising: a transformer body, comprising a first shell, a second shell detachably connected with the first shell, and storage cavities arranged in the first shell and the second shell, and the two storage cavities are communicated with each other; a current transformer assembly, comprising a ring-shaped iron core arranged in the storage cavity, a winding assembly arranged on the ring-shaped iron core, and an insulating piece arranged outside the ring-shaped iron core; and a shielding assembly arranged in the storage cavity, the application adopts detachable and buckling type shells, is convenient to assemble and maintain, and is beneficial to miniaturized arrangement; the circumferential self-adaptive shielding is realized through the shielding assembly which can be unfolded and folded, the internal disturbance and magnetic resistance structure is matched, the stray magnetic field interference is effectively weakened, the broadband, high-precision and stable current detection is realized in combination with giant magnetoresistance sensing characteristics, and the operation reliability and measurement accuracy of the transformer are improved.

Description

Technical Field

[0001] This invention relates to the technical field of current transformers, and more particularly to a miniaturized broadband current transformer. Background Technology

[0002] Current transformers based on the giant magnetoresistive effect have been widely used in DC and frequency conversion power distribution systems due to their advantages such as wide-band response, no magnetic saturation, and miniaturization. However, existing giant magnetoresistive current transformers mostly employ fixed shielding structures or simple enclosures, with non-adjustable shielding ranges, making them unsuitable for different magnetic field environments and installation scenarios. Furthermore, the fixed enclosures make assembly and maintenance inconvenient, and the internal core and windings are susceptible to interference from external stray magnetic fields, leading to decreased wide-band measurement accuracy and insufficient stability.

[0003] This invention addresses the technical problems of existing giant magnetoresistive current transformers, such as poor shielding effect, non-adjustable shielding range, inconvenient assembly, weak anti-interference capability, and unstable broadband measurement accuracy. It provides a miniaturized broadband current transformer that solves the technical pain points of large stray magnetic field interference, cumbersome assembly and maintenance, and insufficient measurement stability through deployable shielding components and detachable shell structure. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the current miniaturized broadband current transformers, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a miniaturized broadband current transformer.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a miniaturized broadband current transformer, comprising: a transformer body, including a first housing, a second housing detachably connected to the first housing, and a storage cavity disposed within the first housing and the second housing, the two storage cavities being interconnected; a current transformer assembly, including an annular core disposed within the storage cavity, a winding assembly disposed on the annular core, and an insulating member disposed outside the annular core; and a shielding assembly disposed within the storage cavity.

[0008] As a preferred embodiment of the miniaturized broadband current transformer of the present invention, wherein: an extension plate is provided on the end side of the first housing and the second housing, a mating slot is provided on the extension plate, an inclined block is provided on the extension plate, a mating inclined groove that mates with the inclined block is detachably connected in the mating slot, a surface groove is provided on the outer side of both the first housing and the second housing, a winding plate is detachably connected on the surface groove, and a locking member is provided at the end of the winding plate.

[0009] In a preferred embodiment of the miniaturized broadband current transformer of the present invention, a support is provided inside the storage cavity, the support is installed in conjunction with the annular iron core, a sealing plate for sealing the storage box is provided on both the first housing and the second housing, a mating hole for cooperating with the support is provided on the sealing plate, and a plug rod is provided on the support.

[0010] In a preferred embodiment of the miniaturized broadband current transformer of the present invention, the shielding assembly includes an arc-shaped guide rail disposed in each storage cavity, a first slider and a second slider slidably connected to the arc-shaped guide rail, and a plurality of driving members disposed between the first slider and the second slider. A first driving rod is rotatably connected to the first slider, and a second driving rod is coaxially disposed on the first driving rod. Both the first driving rod and the second driving rod are hinged to the driving members. The second slider is also provided with a first driving rod and a second driving rod.

[0011] In a preferred embodiment of the miniaturized broadband current transformer of the present invention, the driving component includes a first pull rod hinged to a first driving rod and a second pull rod hinged to a second driving rod. A plurality of first pull rods are equidistantly arranged, and a plurality of second pull rods are equidistantly arranged, forming an angle with the first pull rods. The first pull rods and the second pull rods are sequentially hinged end to end, and the first pull rods and the second pull rods are hinged in the middle section. The length of the first driving rod is twice the length of the second driving rod, and a shielding component is provided between the first pull rods and the second pull rods.

[0012] As a preferred embodiment of the miniaturized broadband current transformer of the present invention, the shielding component includes a mounting groove disposed on the first pull rod and the second pull rod, a plurality of outer frames disposed in the mounting groove, a connecting cylinder disposed on each outer frame, and a telescopic groove opened on the end side wall of the connecting cylinder. An auxiliary cylinder is slidably connected in the telescopic groove. The outer surfaces of the auxiliary cylinder and the connecting cylinder are provided with irregularly shaped antimagnetic strips. An unfolding component is disposed on the outer frame.

[0013] As a preferred embodiment of the miniaturized broadband current transformer of the present invention, the unfolding component includes an auxiliary rod disposed on the outer frame and a connecting piece disposed between every two adjacent outer frames. The upper and lower ends of each outer frame are respectively connected to the connecting piece and extend outward to the adjacent outer frame. An elastic element is disposed between the auxiliary cylinder and the telescopic groove.

[0014] In a preferred embodiment of the miniaturized broadband current transformer of the present invention, a sliding groove is provided on both the first housing and the second housing, an operating rod that cooperates with the sliding groove is provided on the second slider, and a baffle is provided on the operating rod, the shape of which cooperates with the sliding groove.

[0015] As a preferred embodiment of the miniaturized broadband current transformer of the present invention, the auxiliary cylinder is provided with an array of several first swivel plates, an arc swivel plate connecting every two adjacent first swivel plates, a second swivel plate connected to the arc swivel plate, and an inwardly concave folded plate connected to the second swivel plate. Each second swivel plate corresponds to two inwardly concave folded plates. The end sides of the first swivel plates are inclined. The end sides of the arc swivel plates are provided with arc surfaces. The end sides of the auxiliary cylinder are provided with arc-shaped contact surfaces. The end sides of the connecting cylinder are provided with inclined push plates.

[0016] In a preferred embodiment of the miniaturized broadband current transformer of the present invention, a rubber layer is provided on the inclined push plate.

[0017] The beneficial effects of this invention are as follows: the transformer body, the current transformer component, and the shielding component work together to achieve high-precision acquisition of current signals, wide-band response, and electromagnetic shielding, which can reduce the influence of external interference, improve measurement stability, and facilitate the assembly of the miniaturized structure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a schematic diagram of the overall structure of the miniaturized broadband current transformer of the present invention.

[0020] Figure 2 This is a schematic diagram of the internal structure of the miniaturized broadband current transformer of the present invention.

[0021] Figure 3 This is a three-dimensional view of the internal structure of the miniaturized broadband current transformer of the present invention.

[0022] Figure 4 This is a schematic diagram showing the installation status of the shielding assembly of the miniaturized broadband current transformer of the present invention.

[0023] Figure 5 This is a schematic diagram showing the location of the shielding component in the miniaturized broadband current transformer of the present invention.

[0024] Figure 6 This is a schematic diagram of the shielding component of the miniaturized broadband current transformer of the present invention.

[0025] Figure 7 This is a schematic diagram of the back of the overall structure of the miniaturized broadband current transformer of the present invention.

[0026] Figure 8 This is a schematic diagram of the auxiliary cylinder of the miniaturized broadband current transformer of the present invention.

[0027] Figure 9 This is a front view of the auxiliary cylinder of the miniaturized broadband current transformer of the present invention.

[0028] Figure 10 This is a schematic diagram of the shielding component of the miniaturized broadband current transformer of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 100, current transformer body; 101, first housing; 102, second housing; 103, storage cavity; 200, current transformer assembly; 201, toroidal core; 202, winding assembly; 203, insulating component; 104, extension plate; 105, mating slot; 106, inclined block; 107, mating inclined groove; 108, surface groove; 109, winding plate; 204, bracket; 205, sealing plate; 206, insertion rod; 300, shielding assembly; 301, arc-shaped guide rail; 302, first slider; 303, second slider; 304, driving component; 305, first... Drive rod; 306, second drive rod; 3041, first pull rod; 3042, second pull rod; 400, shielding component; 401, mounting groove; 402, outer frame; 403, connecting cylinder; 404, telescopic groove; 405, auxiliary cylinder; 406, irregular antimagnetic strip; 500, unfolding component; 501, auxiliary rod; 502, connecting piece; 503, elastic component; 504, sliding groove; 505, operating rod; 506, baffle; 600, first baffle plate; 601, arc baffle plate; 602, second baffle plate; 603, concave folding plate; 604, arc-shaped contact surface; 605, inclined push plate. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0034] Example 1

[0035] Reference Figures 1-10 The first embodiment of the present invention provides a miniaturized broadband current transformer, including a transformer body 100, a current transformer component 200 and a shielding component 300. The components work together to achieve high-precision acquisition of current signals, broadband response and electromagnetic shielding, which can reduce the influence of external interference, improve measurement stability and the ease of assembly of the miniaturized structure.

[0036] Furthermore, in this embodiment, the current transformer body 100 includes a first housing 101, a second housing 102 detachably connected to the first housing 101, and a storage cavity 103 disposed within the first housing 101 and the second housing 102. The two storage cavities 103 are interconnected. The first housing 101 and the second housing 102 adopt a snap-fit ​​assembly structure, which is convenient for disassembly and assembly, and facilitates the installation and maintenance of internal components. The interconnected storage cavities 103 provide a unified installation space for the current transformer component 200 and the shielding component 300, resulting in a compact structure that is conducive to achieving overall miniaturization design.

[0037] Furthermore, an extension plate 104 is provided on the end face of the first housing 101 and the second housing 102. A mating slot 105 is provided on the extension plate 104. An inclined block 106 is provided on the extension plate 104. A mating inclined groove 107 that mates with the inclined block 106 is detachably connected in the mating slot 105. The extension plate 104 and the mating slot 105 are inserted and mated to realize the rapid positioning and assembly of the first housing 101 and the second housing 102.

[0038] Furthermore, surface grooves 108 are provided on the outer sides of both the first housing 101 and the second housing 102. A winding plate 109 is detachably connected to the surface groove 108, and a locking member is provided at the end of the winding plate 109. The surface groove 108 provides installation positioning for the winding plate 109, which can be used for neatly storing external wire harnesses. The locking member fixes the winding plate 109, preventing it from loosening and falling off, and improving the overall structural integrity.

[0039] Furthermore, a bracket 204 is provided inside the storage cavity 103, which is installed in conjunction with the annular iron core 201. Both the first housing 101 and the second housing 102 are provided with sealing plates 205 for enclosing the storage cavity 103. The sealing plates 205 have mating holes that mate with the bracket 204, and the bracket 204 has a plug rod 206. The bracket 204 provides fixed support for the annular iron core 201, ensuring the core's stable position and preventing shaking or displacement. The sealing plates 205 enclose the storage cavity 103, forming an internal sealed space and reducing external interference. The mating holes and plug rods 206 engage to achieve a positioning connection between the bracket 204 and the sealing plates 205, improving the assembly accuracy of the internal structure.

[0040] Furthermore, in this embodiment, the current transformer assembly 200 includes a toroidal core 201 disposed within the storage cavity 103, a winding assembly 202 disposed on the toroidal core 201, and an insulating member 203 disposed outside the toroidal core 201. The toroidal core 201 is made of a high-permeability material, improving current sensing sensitivity over a wide frequency range. The winding assembly 202 is uniformly wound on the toroidal core 201 to achieve the sensing and acquisition of a primary current signal. The insulating member 203 wraps around the outside of the toroidal core 201, achieving electrical insulation isolation and preventing electrical breakdown between the winding and the housing and shielding assembly 300, thereby improving safety and signal stability.

[0041] Furthermore, the shielding component 300 is disposed within the storage cavity 103 to shield external electromagnetic interference and improve measurement accuracy. The shielding component 300 includes an arc-shaped guide rail 301 disposed within each storage cavity 103, a first slider 302 and a second slider 303 slidably connected to the arc-shaped guide rail 301, and a plurality of driving components 304 disposed between the first slider 302 and the second slider 303. The arc-shaped guide rail 301 provides an arc-shaped movement path for the first slider 302 and the second slider 303, allowing the shielding structure to expand and contract circumferentially. The first slider 302 and the second slider 303 slide directionally along the arc-shaped guide rail 301, ensuring smooth and stable movement and uniform coverage of the shielding area.

[0042] Furthermore, a first drive rod 305 is rotatably connected to the first slider 302, and a second drive rod 306 is coaxially arranged on the first drive rod 305. Both the first drive rod 305 and the second drive rod 306 are hinged to the drive member 304. The first drive rod 305 and the second drive rod 306 are also arranged on the second slider 303. The first drive rod 305 and the second drive rod 306 form a linkage transmission structure to transmit power to realize the unfolding and retracting action of the shield 400. The coaxial arrangement ensures the concentricity of the transmission, high synchronization of action, and avoids jamming.

[0043] Furthermore, in this embodiment, the driving component 304 includes a first pull rod 3041 hinged to the first driving rod 305 and a second pull rod 3042 hinged to the second driving rod 306. A plurality of first pull rods 3041 are equidistantly arranged, and a plurality of second pull rods 3042 are equidistantly arranged, forming an angle with the first pull rods 3041. The first pull rods 3041 and second pull rods 3042 are sequentially hinged end-to-end, with the first pull rods 3041 and second pull rods 3042 hinged at the middle section. The length of the first driving rod 305 is twice the length of the second driving rod 306. The equidistantly arranged pull rods ensure uniform force distribution on the shielding, resulting in smooth deployment and retraction. The end-to-end hinges and the middle section cross-hinges form a scissor-type telescopic structure, enabling continuous adjustment of the shielding range.

[0044] Preferably, the length ratio setting ensures matching of the movement stroke and improves the coordination of structural movement. A shielding component 400 is provided between the first pull rod 3041 and the second pull rod 3042. The shielding component 400 expands or contracts with the movement of the pull rod to form a continuous shielding surface, blocking external stray magnetic field interference and improving broadband measurement accuracy.

[0045] Furthermore, in this embodiment, the shielding component 400 includes a mounting groove 401 disposed on the first pull rod 3041 and the second pull rod 3042, a plurality of outer frame pieces 402 disposed within the mounting groove 401, a connecting cylinder 403 disposed on each outer frame piece 402, and a telescopic groove 404 formed on the end side wall of the connecting cylinder 403. An auxiliary cylinder 405 is slidably connected within the telescopic groove 404. The mounting groove 401 provides a fixed mounting position for the outer frame pieces 402, ensuring a firm and reliable connection. The outer frame pieces 402 form the shielding unit skeleton, ensuring the rigidity of the shielding structure. The telescopic groove 404 and the auxiliary cylinder 405 form a telescopic structure, which adapts to the length change with the movement of the pull rod, maintaining the continuity and integrity of the shielding surface.

[0046] Preferably, the outer surfaces of the auxiliary cylinder 405 and the connecting cylinder 403 are provided with irregularly shaped antimagnetic strips 406. The irregularly shaped antimagnetic strips 406 are made of high magnetic permeability antimagnetic material, which can directionally shield the interference magnetic field and improve the shielding effect. An unfolding component 500 is provided on the outer frame 402 to drive the shielding unit to unfold synchronously, ensuring that the shielding surface is flat and wrinkle-free.

[0047] Furthermore, in this embodiment, the unfolding component 500 includes an auxiliary rod 501 disposed on the outer frame 402 and a connecting piece 502 disposed between every two adjacent outer frames 402. The upper and lower ends of each outer frame 402 are respectively connected to the connecting piece 502 and extend outward to connect to the adjacent outer frame 402. The auxiliary rod 501 supports the outer frame 402 and improves the structural rigidity. The connecting piece 502 realizes the flexible connection of adjacent outer frames 402 to ensure synchronous action. An elastic element 503 is disposed between the auxiliary cylinder 405 and the telescopic groove 404. The elastic element 503 provides telescopic restoring force, so that the auxiliary cylinder 405 adapts to telescopic extension and contraction with the action, maintains the shielding structure in a taut state, and avoids slack and sagging from affecting the shielding effect.

[0048] Furthermore, a sliding groove 504 is provided on both the first housing 101 and the second housing 102, and an operating rod 505 that cooperates with the sliding groove 504 is provided on the second slider 303. A baffle 506 is provided on the operating rod 505, and the shape of the baffle 506 is compatible with the sliding groove 504.

[0049] Furthermore, the auxiliary cylinder 405 is internally arranged with a plurality of first disruptive plates 600, an arc-shaped disruptive plate 601 connecting every two adjacent first disruptive plates 600, a second disruptive plate 602 connected to the arc-shaped disruptive plate 601, and an inwardly concave folded plate 603 connected to the second disruptive plate 602. The first disruptive plates 600 are evenly spaced along the length of the auxiliary cylinder 405, and their ends are inclined to change the direction of the interference magnetic field and disperse the directional magnetic field conduction path. The arc-shaped disruptive plates 601 are connected between adjacent first disruptive plates 600 in an arc transition form, and their ends are provided with arc surfaces to smoothly deflect the magnetic field direction and reduce magnetic field reflection.

[0050] The second baffle plate 602 is connected to the middle of the arc baffle plate 601 and extends outward. Each second baffle plate 602 is connected to two concave folded plates 603. The concave folded plates 603 bend and extend to both sides and connect with the adjacent second baffle plate 602. The first baffle plate 600, the arc baffle plate 601, the second baffle plate 602 and the concave folded plates 603 are interleaved and connected in sequence, forming a continuous mesh antimagnetic structure inside the auxiliary cylinder 405.

[0051] This mesh-like antimagnetic structure can divide, deflect, and dissipate external stray magnetic fields, preventing concentrated magnetic field penetration, improving the antimagnetic shielding effect under wide frequency operating conditions, and making the transformer measurement signal more stable.

[0052] An arc-shaped contact surface 604 is provided on the end side of the auxiliary cylinder 405, and an inclined push plate 605 is provided on the end side of the connecting cylinder 403. The arc-shaped contact surface 604 and the inclined push plate 605 fit together to ensure that the auxiliary cylinder 405 moves smoothly during the extension and retraction process without jamming or deviation. A rubber layer is provided on the inclined push plate 605. The rubber layer buffers the contact compression stress, reduces rigid wear, improves the sealing performance of the mating surface, reduces magnetic field leakage, and further enhances the shielding reliability.

[0053] Furthermore, an arc-shaped contact surface 604 is provided on the end side of the auxiliary cylinder 405, an inclined push plate 605 is provided on the end side of the connecting cylinder 403, and a rubber layer is provided on the inclined push plate 605.

[0054] Operation process: During assembly, the first housing 101 and the second housing 102 are snapped together, the extension plate 104 is inserted into the mating slot 105, and the inclined block 106 is guided and locked with the mating inclined groove 107, completing the rapid assembly of the housing. After assembling the annular iron core 201 and the winding assembly 202, it is installed on the bracket 204. The bracket 204 is positioned by the mating insertion hole of the insertion rod 206 and the sealing plate 205, and is inserted into the storage cavity 103.

[0055] The shielding component 300 is installed inside the storage cavity 103. The first slider 302 and the second slider 303 slide along the arc-shaped guide rail 301, driving the first drive rod 305 and the second drive rod 306 to move, which in turn drives the first pull rod 3041 and the second pull rod 3042 to move in a scissor motion, pushing the shielding component 400 to unfold. The irregular antimagnetic strip 406 forms a circumferential shielding layer to block external electromagnetic interference. The elastic element 503 drives the auxiliary cylinder 405 to extend and retract adaptively. The connecting piece 502 and the auxiliary rod 501 ensure that the outer frame 402 unfolds synchronously, so that the shielding surface evenly covers the outer periphery of the current transformer component 200.

[0056] During operation, a primary current passes through the inside of the toroidal iron core 201, inducing a secondary current signal in the winding assembly 202, enabling high-precision acquisition of current signals over a wide frequency range. The insulating component 203 isolates electrical gaps, and the shielding component 300 continuously shields against external interference, ensuring a pure and stable measurement signal. The winding plate 109 organizes the external wiring harness, and the locking component fixes its position. The overall structure is compact and stable, achieving miniaturized, wide-frequency, high-precision current measurement.

[0057] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0058] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0059] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A miniaturized broadband current transformer, characterized in that: include: The transformer body (100) includes a first housing (101), a second housing (102) detachably connected to the first housing (101), and a storage cavity (103) disposed in the first housing (101) and the second housing (102), wherein the two storage cavities (103) are interconnected. The current transformer assembly (200) includes an annular core (201) disposed in the storage cavity (103), a winding assembly (202) disposed on the annular core (201), and an insulating member (203) disposed on the outside of the annular core (201). A shielding assembly (300) is disposed within the storage cavity (103).

2. The miniaturized broadband current transformer as described in claim 1, characterized in that: An extension plate (104) is provided on the end side of the first housing (101) and the second housing (102). A mating slot (105) is provided on the extension plate (104). An inclined block (106) is provided on the extension plate (104). A mating inclined groove (107) that mates with the inclined block (106) is detachably connected in the mating slot (105). A surface groove (108) is provided on the outer side of both the first housing (101) and the second housing (102). A winding plate (109) is detachably connected on the surface groove (108). A locking member is provided at the end of the winding plate (109).

3. The miniaturized broadband current transformer as described in claim 2, characterized in that: The storage cavity (103) is provided with a bracket (204), which is installed in conjunction with the annular iron core (201). The first housing (101) and the second housing (102) are both provided with a sealing plate (205) for sealing the storage box. The sealing plate (205) is provided with a mating insertion hole that mates with the bracket (204). The bracket (204) is provided with a plug rod (206).

4. The miniaturized broadband current transformer as described in claim 3, characterized in that: The shielding assembly (300) includes an arc-shaped guide rail (301) disposed in each storage cavity (103), a first slider (302) and a second slider (303) slidably connected to the arc-shaped guide rail (301), and a plurality of driving members (304) disposed between the first slider (302) and the second slider (303). A first driving rod (305) is rotatably connected to the first slider (302), and a second driving rod (306) is coaxially disposed on the first driving rod (305). The first driving rod (305) and the second driving rod (306) are both hinged to the driving members (304). The second slider (303) is also provided with a first driving rod (305) and a second driving rod (306).

5. The miniaturized broadband current transformer as described in claim 4, characterized in that: The driving component (304) includes a first pull rod (3041) hinged to a first driving rod (305) and a second pull rod (3042) hinged to a second driving rod (306). A plurality of first pull rods (3041) are equidistantly arranged, and a plurality of second pull rods (3042) are equidistantly arranged, forming an angle with the first pull rods (3041). The first pull rods (3041) and the second pull rods (3042) are sequentially hinged end to end. The first pull rods (3041) and the second pull rods (3042) are hinged in the middle section. The length of the first driving rod (305) is twice the length of the second driving rod (306). A shielding component (400) is provided between the first pull rods (3041) and the second pull rods (3042).

6. The miniaturized broadband current transformer as described in claim 5, characterized in that: The shielding component (400) includes a mounting groove (401) on the first pull rod (3041) and the second pull rod (3042), a plurality of outer frame frames (402) in the mounting groove (401), a connecting cylinder (403) on each outer frame frame (402), and a telescopic groove (404) on the end side wall of the connecting cylinder (403). An auxiliary cylinder (405) is slidably connected in the telescopic groove (404). The outer surfaces of the auxiliary cylinder (405) and the connecting cylinder (403) are provided with irregular antimagnetic strips (406). An unfolding component (500) is provided on the outer frame frame (402).

7. The miniaturized broadband current transformer as described in claim 6, characterized in that: The unfolding component (500) includes an auxiliary rod (501) disposed on the outer frame (402) and a connecting piece (502) disposed between every two adjacent outer frames (402). The upper and lower ends of each outer frame (402) are respectively connected to the connecting piece (502) and extend outward to connect to the adjacent outer frame (402). An elastic element (503) is disposed between the auxiliary cylinder (405) and the telescopic groove (404).

8. The miniaturized broadband current transformer as described in claim 4, characterized in that: The first housing (101) and the second housing (102) are both provided with sliding grooves (504). The second slider (303) is provided with an operating rod (505) that cooperates with the sliding groove (504). The operating rod (505) is provided with a baffle (506), and the shape of the baffle (506) is in accordance with the sliding groove (504).

9. The miniaturized broadband current transformer as described in claim 6, characterized in that: The auxiliary cylinder (405) is arranged with a plurality of first swerves (600), an arc swerve (601) connecting every two adjacent first swerves (600), a second swerve (602) connected to the arc swerve (601), and an inwardly concave folded plate (603) connected to the second swerve (602). Each second swerve (602) corresponds to two inwardly concave folded plates (603). The end side of the first swerve (600) is inclined. The end side of the arc swerve (601) is provided with an arc surface. The end side of the auxiliary cylinder (405) is provided with an arc-shaped contact surface (604). The end side of the connecting cylinder (403) is provided with an inclined push plate (605).

10. The miniaturized broadband current transformer as described in claim 9, characterized in that: A rubber layer is provided on the inclined push plate (605).

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