Anti-electromagnetic interference type current transformer device

Abstract

The utility model provides an anti-electromagnetic interference type current transformer device, which belongs to the technical field of current transformers, and comprises a supporting assembly, a base, a supporting strip slidably mounted on the side wall of the base, and a connecting piece slidably mounted on the inner side of the supporting strip; the current transformer assembly comprises a shell inserted into the upper end of the connecting piece, a magnetic ring fixedly connected to the interior of the shell, a winding groove formed in the middle of the shell, a pole piece packaged at the top of the shell and a coil fixedly connected to the interior of the shell. The beneficial effects of the utility model are that through the cooperative use of the supporting assembly and the current transformer assembly, external electromagnetic interference is effectively blocked, the structure is compact, electromagnetic leakage is reduced, stable and accurate work of the current transformer in a complex electromagnetic environment is ensured, the measurement precision and reliability are improved, and the installation, disassembly and maintenance are convenient. And the horizontal and height positions of the current transformer assembly can be flexibly adjusted to adapt to various installation scenes.

Description

Technical Field

[0001] This utility model belongs to the field of current transformer technology, specifically relating to an electromagnetic interference-resistant current transformer device. Background Technology

[0002] In the context of the widespread application of modern power systems and various electronic devices, the reliability and stability of current transformers, as a key electrical device, are of paramount importance. With the rapid development of electronic technology, the electromagnetic environment in which electrical equipment operates is becoming increasingly complex, and various sources of electromagnetic interference are emerging in large numbers, seriously threatening the normal operation of current transformers.

[0003] In industrial production, numerous large-scale mechanical equipment, high-frequency heating devices, and variable frequency speed control equipment can generate high-intensity electromagnetic radiation. This electromagnetic interference can not only reduce the measurement accuracy of current transformers and cause measurement errors, but may even distort the output signal of the transformers, thereby affecting the safe and stable operation of the entire power system. For example, in steel smelting plants, the simultaneous operation of a large number of high-power electrical devices creates a complex electromagnetic environment that poses a significant challenge to the measurement accuracy of current transformers, leading to inaccurate power metering and affecting production cost accounting and equipment operation monitoring. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic interference-resistant current transformer device, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An electromagnetic interference-resistant current transformer device includes,

[0007] The support assembly includes a base, a support strip slidably mounted on the side wall of the base, and a connector slidably mounted on the inner side of the support strip. The side wall of the support strip is flush with the upper surface of the base, and the side wall of the connector is flush with the side wall of the support strip.

[0008] A current transformer assembly includes a housing inserted into the upper end of the connector, a magnetic ring fixedly connected inside the housing, a winding groove disposed in the middle of the housing, pole pieces encapsulated on the top of the housing, and a coil fixedly connected inside the housing. The coil is wound around the side wall of the magnetic ring, and the pole pieces are electrically connected to the coil via wires.

[0009] As a preferred embodiment of the present invention, the current transformer assembly further includes a pad inserted into the inner wall of the housing, the pad being located outside the magnetic ring.

[0010] As a preferred embodiment of this utility model, the current transformer assembly further includes a mounting foot fixedly connected to the outer wall of the housing. The end of the mounting foot is engaged with the middle position of the upper end of the connector, and the mounting foot has a through hole structure in the middle that cooperates with the central threaded hole of the connector.

[0011] As a preferred embodiment of the present invention, the current transformer assembly further includes a positioning block fixedly connected to the middle position of the outer side wall of the housing, and the positioning block has a positioning notch in the middle for use with the winding groove.

[0012] As a preferred embodiment of the present invention, the support assembly further includes a knob threadedly connected to the side wall of the connector, the end of the knob passing through the connector and snapped into the inner side wall of the support bar.

[0013] In a preferred embodiment of the present invention, the support assembly further includes a lead screw rotatably mounted on the side wall of the base, the end of which is threadedly connected to the side wall of the support bar.

[0014] In a preferred embodiment of the present invention, the support assembly further includes a rubber plug inserted into the side wall of the base, with the end of the rubber plug sleeved on the end of the lead screw.

[0015] Compared with existing technologies, the advantages of this utility model are: the insulating shell and pad effectively block external electromagnetic interference; the compact structure reduces electromagnetic leakage, ensuring the current transformer operates stably and accurately in complex electromagnetic environments, thus improving measurement accuracy and reliability. The current transformer assembly and support assembly are connected by plug-in, snap-fit, and threaded connections, facilitating installation, disassembly, and maintenance. Simultaneously, the lead screw and knob of the support assembly allow for flexible adjustment of the current transformer assembly's horizontal and vertical position, adapting to various installation scenarios. The fit between the mounting feet and connectors, along with the design of the positioning blocks, ensures that the current transformer assembly will not loosen or shift during operation, improving the stability and durability of the device. A rubber plug protects the end of the lead screw, preventing impurities from entering and affecting its rotation, thus extending the device's service life. The pad buffers and secures the magnetic ring, reducing damage to internal components caused by vibration or external impact. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the top structure of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of section AA of the present invention.

[0021] In the diagram: 100, support assembly; 101, base; 102, support bar; 103, connector; 104, knob; 105, lead screw; 106, rubber plug; 200, current transformer assembly; 201, housing; 202, magnetic ring; 203, winding groove; 204, pole piece; 205, coil; 206, pad; 207, mounting foot; 208, positioning block. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an 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 excludes other embodiments.

[0025] Example

[0026] Reference Figure 1-4 This is an embodiment of the present invention, which provides an electromagnetic interference-resistant current transformer device, comprising:

[0027] The support assembly 100 includes a base 101, a support bar 102 slidably mounted on the side wall of the base 101, and a connector 103 slidably mounted on the inner side of the support bar 102. The side wall of the support bar 102 is flush with the upper surface of the base 101, and the side wall of the connector 103 is flush with the side wall of the support bar 102.

[0028] The current transformer assembly 200 includes a housing 201 inserted into the upper end of the connector 103, a magnetic ring 202 fixedly connected inside the housing 201, a winding groove 203 disposed in the middle of the housing 201, a pole piece 204 encapsulated on the top of the housing 201, and a coil 205 fixedly connected inside the housing 201. The coil 205 is wound around the side wall of the magnetic ring 202, and the pole piece 204 is electrically connected to the coil 205 through a wire.

[0029] The base 101 serves as the fundamental support component of the entire device, providing a mounting platform for other components. The support bar 102 can slide smoothly along the side wall of the base 101. The side wall of the support bar 102 is flush with the upper surface of the base 101; this design ensures uniform support force when supporting the current transformer assembly 200, avoiding stress concentration. The connector 103 is also slidably mounted inside the support bar 102, further enhancing the stability and integrity of the structure. The connector 103 plays a crucial role in connecting and transmitting forces within the entire support assembly, effectively connecting the current transformer assembly 200 to the support bar 102. The housing 201 serves as the outer shell of the current transformer assembly 200, protecting the internal electronic components. Its material is typically engineering plastics or insulating metals with good insulation properties and mechanical strength, such as polycarbonate or aluminum alloy with an insulating surface treatment. The housing 201 is installed on the upper end of the connector 103 via a plug-in connection. This connection method facilitates installation and disassembly, and makes it easy to maintain and repair the current transformer assembly 200 later. The magnetic ring 202 is fixedly connected inside the housing 201 and is one of the core components for the electromagnetic conversion of the current transformer. The magnetic ring 202 generally uses a high-permeability magnetic material, such as manganese-zinc ferrite or nickel-zinc ferrite, which can effectively enhance the magnetic field strength and improve the conversion efficiency of the current transformer. The winding groove 203 is located in the middle of the housing 201 and is used to wind the circuit to be detected, ensuring that the wire is wound neatly and tightly, thereby improving the performance stability of the current transformer. The pole piece 204 is encapsulated on the top of the housing 201 and is electrically connected to the coil 205 through a wire. The pole piece 204 serves as the interface for connecting the current transformer to the external circuit, and is responsible for transmitting the induced current to the external circuit to ensure the efficiency and stability of current transmission. The coil 205 is wound on the side wall of the magnetic ring 202 and is a key component for the electromagnetic induction of the current transformer. The coil 205 is generally made of enameled wire. Through the principle of electromagnetic induction, when the current being measured passes through the coil 205, an alternating magnetic field is generated in the magnetic ring 202, and a corresponding current is induced in the circuit connected to the control component and the pole piece 204.

[0030] Specifically, the current transformer assembly 200 also includes a pad 206 inserted into the inner wall of the housing 201, the pad 206 being located outside the magnetic ring 202.

[0031] The pad 206 serves to buffer and fix the magnetic ring 202, preventing the magnetic ring 202 from shifting inside the housing 201 due to vibration or external impact, thus affecting the performance of the current transformer. It is made of a weak magnetic material, which can reduce the electromagnetic interference generated between the magnetic ring 202 and the circuit.

[0032] Furthermore, the current transformer assembly 200 also includes a mounting foot 207 fixedly connected to the outer wall of the housing 201. The end of the mounting foot 207 is engaged with the middle position of the upper end of the connector 103, and the mounting foot 207 has a through hole structure in the middle that cooperates with the central threaded hole of the connector 103.

[0033] The mounting foot 207 is fixedly connected to the outer wall of the housing 201, and its end is snapped into the middle position of the upper end of the connector 103. The mounting foot 207 has a through hole structure in the middle that mates with the central threaded hole of the connector 103. By passing a bolt through the through hole of the mounting foot 207 and the central threaded hole of the connector 103, the current transformer assembly 200 can be firmly fixed to the connector 103, ensuring that it will not loosen during use.

[0034] Furthermore, the current transformer assembly 200 also includes a positioning block 208 fixedly connected to the middle position of the outer side wall of the housing 201, and the positioning block 208 has a positioning notch in the middle for use with the winding groove 203.

[0035] The positioning block 208 is fixedly connected to the middle of the outer wall of the housing 201, and has a positioning notch in the middle for use with the winding groove 203. The function of the positioning block 208 is to provide a positioning reference for the installation of the winding groove 203 and the wire during installation and maintenance, so that the operator can accurately wind the wire in the winding groove 203, thereby improving the accuracy and efficiency of installation.

[0036] Preferably, the support assembly 100 also includes a knob 104 threaded to the side wall of the connector 103, the end of the knob 104 passing through the connector 103 and snapped into the inner side wall of the support bar 102.

[0037] The knob 104 is threaded onto the side wall of the connector 103, with its end penetrating the connector 103 and engaging with the inner wall of the support bar 102. When the knob 104 is rotated, the threaded action causes pressure to be applied to the inner wall of the support bar 102, thereby fixing or adjusting the position of the connector 103 on the support bar 102. This structural design allows users to flexibly adjust the height of the current transformer assembly 200 according to their actual needs.

[0038] It should be noted that the support assembly 100 also includes a lead screw 105 rotatably mounted on the side wall of the base 101, with the end of the lead screw 105 threadedly connected to the side wall of the support bar 102.

[0039] The lead screw 105 is rotatably mounted on the side wall of the base 101, and its end is threadedly connected to the side wall of the support bar 102. By rotating the lead screw 105, the position of the support bar 102 on the side wall of the base 101 can be precisely adjusted using the threaded transmission principle, thereby achieving fine-tuning of the horizontal position of the current transformer assembly 200. This adjustable structure can meet the requirements of applications with high installation position accuracy, ensuring that the current transformer assembly 200 can be accurately installed in the required position. The lead screw 105 can also be a double-ended lead screw, allowing the two sets of support bars 102 to move synchronously outward or inward.

[0040] Preferably, the support assembly 100 further includes a rubber plug 106 inserted into the side wall of the base 101, with the end of the rubber plug 106 sleeved on the end of the lead screw 105.

[0041] The rubber plug 106 is inserted into the side wall of the base 101, with its end sleeved on the end of the lead screw 105. The rubber plug 106 primarily protects the end of the lead screw 105, preventing dust, moisture, and other impurities from entering the threaded portion of the lead screw 105 and affecting its smooth rotation and service life. Simultaneously, the rubber plug 106 also provides some cushioning and shock absorption, reducing the impact of external vibrations on the lead screw 105.

[0042] During use, when the measured current passes through the conductor wound in the middle of the current transformer assembly 200, an alternating magnetic field is generated in the magnetic ring 202 according to the law of electromagnetic induction. This alternating magnetic field induces a corresponding current at the pole piece 204 connected to the coil 205. Because the magnetic ring 202 has high permeability, it enhances the magnetic field strength, thereby improving the conversion efficiency of the current transformer and allowing the induced current to more accurately reflect the magnitude of the measured current. The housing 201 is made of insulating material, effectively blocking external electromagnetic interference from entering the current transformer assembly 200. Simultaneously, the pad 206 acts as an insulating buffer layer, further reducing the impact of external vibrations or electromagnetic interference on the magnetic ring 202 and the coil 205. Furthermore, the compact design of the entire device and the tight connections between components reduce the possibility of electromagnetic leakage, thereby improving the device's anti-electromagnetic interference performance. By rotating the lead screw 105, the position of the support bar 102 on the side wall of the base 101 can be adjusted, thereby achieving fine-tuning of the horizontal position of the current transformer assembly 200. Meanwhile, rotating the knob 104 can adjust the height of the connector 103 on the support bar 102, thereby enabling flexible adjustment of the height of the current transformer assembly 200. This position adjustment function can meet the precise requirements for the installation position of the current transformer assembly 200 under different installation environments and usage needs.

[0043] In summary, the insulating housing 201 and pad 206 effectively block external electromagnetic interference, and the compact structure reduces electromagnetic leakage, ensuring the current transformer operates stably and accurately in complex electromagnetic environments, thus improving measurement accuracy and reliability. The current transformer assembly 200 and the support assembly 100 are connected by plug-in, snap-fit, and threaded connections, facilitating installation, disassembly, and maintenance. Simultaneously, the lead screw 105 and knob 104 of the support assembly 100 allow for flexible adjustment of the horizontal and vertical position of the current transformer assembly 200, adapting to various installation scenarios. The fit between the mounting feet 207 and the connector 103, along with the design of the positioning block 208, ensures that the current transformer assembly 200 will not loosen or shift during operation, improving the stability and durability of the device. The rubber plug 106 protects the end of the lead screw 105, preventing impurities from entering and affecting its rotation, thus extending the device's service life. The pad 206 buffers and secures the magnetic ring 202, reducing damage to internal components caused by vibration or external impact.

[0044] 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 proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting 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 this utility model. 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 structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] 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 present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0046] 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.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An electromagnetic interference resistant current transformer device, characterized by: Comprising, The support assembly (100) comprises a base (101), a support bar (102) slidably mounted on the side wall of the base (101), and a connecting piece (103) slidably mounted on the inner side of the support bar (102), the side wall of the support bar (102) is flush with the upper end surface of the base (101), and the side wall of the connecting piece (103) is flush with the side wall of the support bar (102); The current transformer assembly (200) comprises a shell (201) inserted on the upper end of the connecting piece (103), a magnetic ring (202) fixedly connected in the inner part of the shell (201), a winding slot (203) arranged in the middle of the shell (201), a pole piece (204) encapsulated on the top of the shell (201), and a coil (205) fixedly connected in the inner part of the shell (201), the coil (205) is wound on the side wall of the magnetic ring (202), and the pole piece (204) is electrically connected with the coil (205) through a wire.

2. The electromagnetic interference resistant current transformer device of claim 1, wherein: The current transformer assembly (200) further comprises a backing plate (206) inserted on the inner wall of the shell (201), and the backing plate (206) is located outside the magnetic ring (202).

3. The electromagnetic interference resistant current transformer device of claim 2, wherein: The current transformer assembly (200) further comprises a mounting foot (207) fixedly connected on the outer side wall of the shell (201), the mounting foot (207) is clamped on the middle position of the upper end of the connecting piece (103), and a through hole structure is formed in the middle of the mounting foot (207) and matched with the threaded hole in the center of the connecting piece (103).

4. The electromagnetic interference resistant current transformer apparatus of claim 3, wherein: The current transformer assembly (200) further comprises a positioning block (208) fixedly connected on the middle position of the outer side wall of the shell (201), and a positioning notch is formed in the middle of the positioning block (208) and matched with the winding slot (203).

5. The electromagnetic interference resistant current transformer apparatus of claim 4, wherein: The support assembly (100) further comprises a knob (104) threadedly connected on the side wall of the connecting piece (103), and the end of the knob (104) penetrates the connecting piece (103) and is clamped on the inner side wall of the support bar (102).

6. The electromagnetic interference resistant current transformer apparatus of claim 5, wherein: The support assembly (100) further comprises a lead screw (105) rotationally mounted on the side wall of the base (101), and the end of the lead screw (105) is threadedly connected on the side wall of the support bar (102).

7. The electromagnetic interference resistant current transformer apparatus of claim 6, wherein: The support assembly (100) further comprises a rubber plug (106) inserted on the side wall of the base (101), and the end of the rubber plug (106) is sleeved on the end of the lead screw (105).

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