Flexible Rogowski coil, current measuring device and current measuring system

Abstract

The embodiment of the utility model provides a flexible Rogowski coil, a current measuring device and a current measuring system, the flexible Rogowski coil comprises a flexible coil, a connector and an outgoing line, the flexible coil comprises a first coil end and a second coil end, the first coil end comprises a first wire core and a first enameled wire, and the second coil end comprises a second wire core and a second enameled wire. The second coil end comprises a second wire core and a second enameled wire, the connector comprises a first connecting port, a second connecting port and a third connecting port, and the outgoing line comprises an outgoing line core and an outgoing line shielding layer; the first coil end is connected with the first connecting port, the second coil end is connected with the second connecting port, the outgoing line is connected with the third connecting port, the first wire core is connected with the first enameled wire, the second wire core is connected with the outgoing line core, and the second enameled wire is connected with the outgoing line shielding layer. According to the flexible Rogowski coil, the flexible coil and the outgoing line are connected and fixed through the connector, and the flexible Rogowski coil which is easy to manufacture, convenient to disassemble, high in universality and capable of compensating magnetic field interference is obtained.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of current detection sensor, in particular to a flexible Rogowski coil, a current measurement device and a current measurement system. BACKGROUND

[0002] The Rogowski coil (Rogowski coil) is also called a current measurement coil and a differential current transformer. It is a ring coil uniformly wound on a non-ferromagnetic material. Based on the principle of Faraday's law of electromagnetic induction, non-contact current measurement can be realized. When there is current passing through the ring coil, the magnetic field strength changes and generates alternating current signals. These signals are the differential of current with respect to time. By integrating the output voltage signal through a circuit, the true current value passing through the coil can be calculated. Compared with the traditional transformer with a core, the Rogowski coil has the characteristics of real-time current measurement, fast response, no saturation and almost no phase error, and is widely used in smart meters, power quality analysis, motor overload / short circuit protection, capacitor discharge, lightning current detection and other fields.

[0003] However, the current flexible Rogowski coil still has some problems, such as the cable fixed connection structure, the flexible skeleton and the like are complex in design and manufacture, and the design of each part needs to be modified when the measured actual current parameter changes, and the universality is poor. CONTENT OF THE INVENTION

[0004] Therefore, the embodiment of the present application provides a flexible Rogowski coil. One or more embodiments of the present application also provide a current measurement device and a current measurement system to solve the technical defects in the prior art.

[0005] According to a first aspect of the embodiment of the present application, a flexible Rogowski coil is provided, which comprises a flexible coil, a connector and a lead-out wire. The flexible coil comprises a first coil end and a second coil end. The first coil end comprises a first wire core and a first enameled wire. The second coil end comprises a second wire core and a second enameled wire. The connector comprises a first connecting port, a second connecting port and a third connecting port. The lead-out wire comprises a lead-out wire core and a lead-out wire shielding layer.

[0006] The first coil end is connected with the first connecting port, the second coil end is connected with the second connecting port, and the lead-out wire is connected with the third connecting port. The first wire core is connected with the first enameled wire, the second wire core is connected with the lead-out wire core, and the second enameled wire is connected with the lead-out wire shielding layer.

[0007] According to a second aspect of the embodiment of the present application, a current measurement device is provided, which comprises a flexible Rogowski coil.

[0008] According to a third aspect of the embodiments of the present application, a current measurement system is provided, comprising a device to be measured and a current measurement device, the current measurement device comprising a flexible Rogowski coil.

[0009] The flexible Rogowski coil provided by one or more embodiments of the present application is connected and fixed with the lead wire by using the connector comprising the first connecting port, the second connecting port and the third connecting port, so that the flexible Rogowski coil is simple to manufacture and convenient to disassemble, and the connector can rotate completely, so that the flexible Rogowski coil can directly measure irregular objects and adapt to various measurement environment requirements, and has high universality; the first wire core is connected with the first enameled wire, the second wire core is connected with the lead wire core, and the second enameled wire is connected with the lead wire shielding layer, so that the first wire core and the second wire core in the flexible Rogowski coil can be used as a return wire, and when other alternating magnetic lines of force pass through the flexible Rogowski coil during the measurement of pulse current by using the flexible Rogowski coil, the return wire generates an induced electromotive force in the opposite direction and with a similar size to the flexible Rogowski coil, so as to offset the induced electromotive force that interferes with the signal to be measured, and effectively eliminate the influence of return current, so that the flexible Rogowski coil can effectively compensate the magnetic field interference, and has high manufacturing efficiency and low manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural schematic diagram of a first flexible Rogowski coil provided by one embodiment of the present application;

[0011] Figure 2 is a structural schematic diagram of a second flexible Rogowski coil provided by one embodiment of the present application;

[0012] Figure 3 is a structural schematic diagram of a third flexible Rogowski coil provided by one embodiment of the present application;

[0013] Figure 4 is a structural schematic diagram of a fourth flexible Rogowski coil provided by one embodiment of the present application;

[0014] Figure 5 is a structural schematic diagram of a current measurement device provided by one embodiment of the present application;

[0015] Figure 6 is a structural schematic diagram of a current measurement system provided by one embodiment of the present application.

[0016] REFERENCE SIGNS

[0017] 100 - flexible coil, 102 - first coil end, 104 - second coil end, 1022 - first wire core, 1024 - first enameled wire, 1042 - second wire core, 1044 - second enameled wire, 200 - connector, 202 - first connecting port, 204 - second connecting port, 206 - third connecting port, 300 - lead wire, 302 - lead wire core, 304 - lead wire shielding layer, 306 - lead wire insulation layer, 402 - releasing structure, 404 - first connecting point, 406 - second connecting point, 408 - third connecting point, 410 - first fixing material, 412 - second fixing material. DETAILED DESCRIPTION

[0018] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0019] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of one or more embodiments of the present application. As used in one or more embodiments of the present application and the following claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in one or more embodiments of the present application, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0020] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Preferably, the terms "comprise" and / or "comprising," when used in one or more embodiments of the present application, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0021] First, the noun terms related to one or more embodiments of the present application are explained.

[0022] Bridge arm current: refers to the current passing through each bridge arm (a branch in half-bridge or full-bridge circuit) in power electronic converters (such as inverters, rectifiers, etc.). In these circuits, the bridge arm is usually composed of switching devices and possibly freewheeling diodes, used to control the energy conversion process from input to output.

[0023] BNC (Bayonet Neill-Concelman) connector: a type of coaxial cable connector commonly used for RF signal transmission. It is widely used in video, telecommunications, networking, and test equipment fields. BNC connector is named after its unique bayonet-style locking mechanism, which allows quick and secure connection and disconnection of cables.

[0024] Enamelled wire: a type of wire that has a thin layer of insulating enamel coating on the conductive core (usually copper or aluminum). This insulating layer is usually cured onto the metal conductor by heating, providing good electrical insulation, as well as certain heat resistance and mechanical strength. Enamelled wire is widely used in electric motors, transformers, relays and other electromagnetic devices that require tight winding.

[0025] Flexible skeleton: refers to the component or material in a flexible Rogowski coil that serves as a support structure while also having a certain degree of flexibility. The flexible skeleton is one of the basic structures that support the shape of the flexible Rogowski coil and maintain its stability. Compared with traditional rigid skeletons, flexible skeletons allow the coil to more easily adapt to different installation environments or geometries, such as bending or wrapping around irregularly shaped conductors.

[0026] In this application, a flexible Rogowski coil is provided, and this application also relates to a current measurement device and a current measurement system, which are described in detail in the following embodiments.

[0027] Referring to Figure 1 , Figure 1 The structure diagram of the first flexible Rogowski coil provided by an embodiment of the present application is shown, which includes a flexible coil 100, a connector 200 and a lead-out wire 300. The flexible coil 100 includes a first coil end 102 and a second coil end 104. The first coil end 102 includes a first wire core 1022 and a first enamelled wire 1024. The second coil end 104 includes a second wire core 1042 and a second enamelled wire 1044. The connector 200 includes a first connection port 202, a second connection port 204 and a third connection port 206. The lead-out wire 300 includes a lead-out wire core 302 and a lead-out wire shielding layer 304.

[0028] The first coil end 102 is connected with the first connecting port 202, the second coil end 104 is connected with the second connecting port 204, the lead wire 300 is connected with the third connecting port 206, the first wire core 1022 is connected with the first enameled wire 1024, the second wire core 1042 is connected with the lead wire core 302, and the second enameled wire 1044 is connected with the lead wire shielding layer 304.

[0029] It should be noted that the flexible coil 100 refers to a coil wound by a flexible material, thus the flexible coil can be wound on a current path to be measured. The connector 200 refers to a connecting device for protecting the connection of the wire and can conveniently connect and disconnect the first coil end 102. Since the connector 200 comprises the first connecting port 202, the second connecting port 204 and the third connecting port 206, the connector 200 is a three-way connecting device. The shape of the connector 200 can be T-shaped. The connection between the second coil end 104 of the flexible coil 100 and the lead wire 300 is protected by the connector 200, and the first coil end 102 of the flexible coil 100 can be conveniently connected and disconnected with the first connecting port 202 of the connector 200 in the longitudinal direction. The lead wire 300 refers to a wire extended from the flexible coil for connecting to other components or systems. The lead wire 300 can be connected with a BNC connector.

[0030] The first wire core 1022 and the second wire core 1042 can be coaxial wire cores of the flexible skeleton of the flexible coil 100, the lead wire core 302 can be a coaxial wire core (with a BNC interface) of the lead wire 300 for leading out a signal. The first wire core 1022 is connected with the first enameled wire 1024, the second wire core 1042 is welded with the lead wire core 302, and the second enameled wire 1044 is welded with the lead wire shielding layer 304. In this way, the first wire core 1022 and the second wire core 1042 can be used as a return wire. When the flexible Rogowski coil is used to measure a pulse current, if there are other alternating magnetic lines of force passing through the coil (for example, on a tokamak, a longitudinal magnetic field along the direction of the toroidal current), the return wire will generate an induced electromotive force in the opposite direction of the coil with a similar size, which can offset the induced electromotive force that interferes with the signal to be measured, effectively eliminate the influence of the return current and compensate for the magnetic field interference. This connection method does not need to design and pre-embed a return wire in the flexible skeleton for magnetic field compensation, which can effectively improve the production efficiency and reduce the cost.

[0031] In practical applications, when manufacturing flexible Rogowski coils, insulating material can be covered at the first connection point between the first core 1022 and the first enameled wire 1024, the second connection point between the second core 1042 and the lead wire core 302, and the third connection point between the second enameled wire 1044 and the lead wire shielding layer 304 to protect the first, second, and third connection points. For example, two layers of 4mm and 6mm double-wall heat shrink tubing are used to heat shrink the first connection point, making the outer diameter of the first coil end 102 close to the diameter of the 5mm flexible skeleton; insulating material is used to cover the BNC connecting wire portion on the right side of the second connection point between the second core 1042 and the lead wire core 302 to form a lead wire shielding layer; insulating material (such as an adhesive heat shrink sleeve) is used to cover the periphery of the first coil end 102 and the second coil end 104, so that the first coil end 102 conforms to the bayonet size of the first connection port 202 and the second coil end 104 conforms to the bayonet size of the second connection port 204, which facilitates the fixing and disassembly of the flexible coil 100 and the connector 200; the second coil end 104 and the second connection port 204 are fixed by the first fixing material, and the lead wire 300 and the third connection port 206 are fixed by the second fixing material.

[0032] In one embodiment of this application, a release structure for releasing the first coil end 102 is installed on the first connection port 202.

[0033] It should be noted that the release structure refers to a device that allows for easy disassembly of the first coil end 102 and the first connection port 202. The release structure can be a snap-fit ​​device, a tightening device, a push-button device, etc., and the choice depends on the specific circumstances. This application embodiment does not impose any limitations on this. Taking a push-button device as an example, during disassembly, simply pressing the release structure releases the fixation between the first coil end 102 and the first connection port 202.

[0034] See Figure 2 , Figure 2 A schematic diagram of a second flexible Rogowski coil according to an embodiment of this application is shown. The flexible Rogowski coil includes a flexible coil 100, a connector 200, and lead wires 300. By triggering the release structure 402 on the connector 200, the first coil end 102 of the flexible coil 100 can be quickly detached from the connector.

[0035] By applying the solution of this application embodiment, since the flexible Rogowski coil is provided with a release structure, the flexible Rogowski coil can quickly release the first coil end 102 from the first connection port 202, making it more convenient and efficient to use the flexible Rogowski coil for current measurement.

[0036] In one embodiment of this application, the connector 200 includes a three-way quick-connect pneumatic connector, and the release structure includes a three-way connector release ring.

[0037] It should be noted that the connector 200 can use a three-way quick-connect pneumatic joint, such as a PE-08T three-way pneumatic joint with an interface diameter of 8 mm. The three-way quick-connect pneumatic joint is a device used in pneumatic systems for quickly connecting and disconnecting pipes, allowing fluid (usually compressed air) to flow between three pipes. This type of joint makes the installation and maintenance process more convenient and fast, and the connection or separation of the pipes can be completed without the use of tools. The three-way joint release ring refers to a physical component on the three-way quick-connect pneumatic joint, which is used to conveniently release the locking state of the three-way quick-connect pneumatic joint. When disconnection is needed, the three-way joint release ring can be pulled or pushed to safely and quickly disconnect the connection without affecting other parts.

[0038] By applying the scheme of the embodiment of the present application, since the three-way quick-connect pneumatic joint includes a three-way joint release ring, the connector does not need to be additionally designed and manufactured by opening a mold, so that the manufacturing and processing difficulty and cost of the flexible Rogowski coil are extremely low.

[0039] In an embodiment of the present application, the first connection point of the first wire core 1022 and the first enameled wire 1024, the second connection point of the second wire core 1042 and the lead wire core 302, and the third connection point of the second enameled wire 1044 and the lead wire shielding layer 304 are covered with insulating material.

[0040] It should be noted that the insulating material refers to a material used to protect the electrical isolation between the first connection point, the second connection point, and the third connection point. The insulating material can prevent the flexible Rogowski coil from short-circuiting and ensure the safety and reliability of the entire circuit. The insulating material includes but is not limited to double-wall heat shrink tubes (such as 6 mm double-wall heat shrink tubes), insulating tapes, and adhesive heat shrink sleeves, etc., which are selected according to actual conditions, and the embodiment of the present application does not make any limitation on this. The lead wire shielding layer 304 is generally a metal mesh and is used for grounding to shield signals.

[0041] Referring to Figure 3 , Figure 3 A structure diagram of a third flexible Rogowski coil according to an embodiment of the present application is shown, which includes a first connection point 404, a second connection point 406, and a third connection point 408, and the first connection point 404, the second connection point 406, and the third connection point 408 are covered with insulating material.

[0042] By applying the scheme of the embodiment of the present application, since the first connection point 404, the second connection point 406, and the third connection point 408 in the flexible Rogowski coil are covered with insulating material, the accidental flow of current between different conductive parts can be effectively prevented, the electrical isolation between the connection points is ensured, and the flexible Rogowski coil is prevented from short-circuiting.

[0043] In an embodiment of the present application, the first coil end 102 and the second coil end 104 are covered with insulating material, the diameter of the first coil end 102 covered with insulating material is less than or equal to the diameter of the first connecting port 202, and the diameter of the second coil end 104 covered with insulating material is less than or equal to the diameter of the second connecting port 204.

[0044] It should be noted that the diameter of the first coil end 102 covered with insulating material is less than or equal to the diameter of the first connecting port 202, so that the first coil end 102 covered with insulating material conforms to the size of the first connecting port 202, and the diameter of the second coil end 104 covered with insulating material is less than or equal to the diameter of the second connecting port 204, so that the first coil end 102 covered with insulating material conforms to the size of the second connecting port 204.

[0045] By applying the scheme of the embodiment of the present application, since the first coil end 102 and the second coil end 104 are covered with insulating material, it can be ensured that the first coil end 102 conforms to the size of the first connecting port 202 and the second coil end 104 conforms to the size of the second connecting port 204, so that the connection between the flexible coil 100 and the connector 200 is more stable.

[0046] In an embodiment of the present application, the second coil end 104 is fixed to the second connecting port 204 by a first fixing material, and the lead wire 300 is fixed to the third connecting port 206 by a second fixing material.

[0047] It should be noted that the first fixing material refers to the material used to fix the connection between the second coil end 104 and the second connecting port 204, and the second fixing material refers to the material used to fix the connection between the lead wire 300 and the third connecting port 206. The first fixing material and the second fixing material can be a fixing sleeve, such as a 6mm double-wall heat shrink tube with a length of 100mm.

[0048] By applying the scheme of the embodiment of the present application, since the second coil end 104 is fixed to the second connecting port 204 by the first fixing material, and the lead wire 300 is fixed to the third connecting port 206 by the second fixing material, the connection between the flexible coil 100 and the connector 200 is more stable.

[0049] In an embodiment of the present application, the flexible coil 100 further includes a flexible skeleton, the first enameled wire 1024 is wound on one end of the flexible skeleton to form the first coil end 102, and the second enameled wire 1044 is wound on the other end of the flexible skeleton to form the second coil end 104.

[0050] It should be noted that the flexible skeleton is uniformly wound with the enameled wire, and the enameled wire is usually fixed and protected by an insulating material. The flexible skeleton can use a common coaxial cable (such as a 5mm diameter coaxial cable). Specifically, in one embodiment, a complex winding machine can be used to wind the flexible coil 100. In another embodiment, first, two servo motors can be fixed on a plane facing each other, ensuring that the shafts of the two servo motors are on the same axis; then, adjustable concentric fixing tools are installed on the shaft machine head, and the flexible skeleton is fixed on the concentric fixing tools at both ends of the shaft machine head, and the fixing strength is adjusted so that it does not swing when the motor rotates; then, the two servo motors are set to have the same speed and opposite directions, and the spiral winding starts from one end of the skeleton, ensuring that the enameled wire (such as 0.2mm 240-grade heat-resistant polyimide enameled copper round wire (QY-1 / 240-0.19)) is tightly wound on the skeleton without overlapping; finally, the motor control software is used to monitor the number of turns in real time, and the winding is completed when the target number of turns is reached. The setting of the two servo motors can meet the winding requirements of the flexible Rogowski coil and effectively reduce the winding cost of the flexible skeleton.

[0051] In practical applications, when the pulse current in the to-be-measured channel passes through the space around the coil, a transient angular magnetic field is generated, which changes the magnetic flux passing through the coil and generates an induced electromotive force at both ends of the coil; according to the full current law, for any closed loop outside the current, the line integral of the magnetic field strength along the closed path is equal to the pulse current enclosed by the path, as shown in the following formulas (1) and (2):

[0052] (1)

[0053] (2)

[0054] wherein, represents the magnetic field strength, represents the pulse current, represents the induced electromotive force, represents the medium permeability, represents the area of the surrounding turns, represents the number of surrounding turns, represents the circumference of the single loop of the coil, represents the mutual inductance coefficient, which is a constant , and is independent of the spatial distribution of , therefore, the waveform of can be obtained by measuring the waveform of

[0055] Increasing the number of turns of the enameled wire can increase the mutual inductance, improve sensitivity and signal-to-noise ratio, and is suitable for small current and high-precision measurement. However, it will also increase the size and weight of the coil and increase the cost. In order to adapt to high current scenarios, it is necessary to reduce the number of turns and the mutual inductance to expand the measurement range. Therefore, the specific number of turns of the enameled wire is set according to the actual current measurement requirements. This application does not impose any limitation on this.

[0056] By applying the solution of this application embodiment, a tightly wound, non-overlapping flexible coil can be obtained by winding the first enameled wire 1024 and the second enameled wire 1044 on the flexible skeleton.

[0057] In one embodiment of this application, the lead wire 300 further includes a lead wire insulation layer.

[0058] It should be noted that the lead wire insulation layer refers to the insulation layer formed by covering the BNC connection wire portion on the right side of the second connection point between the second core 1042 and the lead wire core 302 with an insulating material (such as 6mm double-wall heat shrink tubing).

[0059] By applying the solution of this application embodiment, since the lead wire 300 includes a lead wire insulation layer, it can effectively prevent the accidental flow of current between different conductive parts, ensure electrical isolation between each connection point, and prevent short circuit of the flexible Rogowski coil.

[0060] See Figure 4 , Figure 4 A schematic diagram of a fourth type of flexible Rogowski coil provided in an embodiment of this application is shown. The flexible Rogowski coil includes a first fixing material 410, a second fixing material 412, and a lead wire insulation layer 306. The first fixing material 410 is used to fix the connection between the second coil end 104 and the second connection port 204, and the second fixing material 412 is used to fix the connection between the lead wire 300 and the third connection port 206.

[0061] Corresponding to the above-described flexible Rogowski coil embodiment, this application also provides an embodiment of a current measuring device. Figure 5 A schematic diagram of the structure of a current measuring device according to an embodiment of this application is shown. Figure 5 As shown, the current measuring device 500 includes a flexible Rogowski coil 502.

[0062] It should be noted that the current measuring device can be used to measure various alternating currents, such as bridge arm current, pulse current, differential current, electrode current, etc., and the specific selection is based on the actual situation, and the embodiments of the present application do not make any limitation. When the Rogowski flexible coil is used for current measurement, the Rogowski flexible coil can be wound on the current path to be measured, and the first coil end of the Rogowski flexible coil is directly inserted into the first connecting port of the connector, so that the Rogowski flexible coil forms a loop to measure the through current. After the current measurement is completed, the release structure in the flexible Rogowski coil can be triggered, that is, the fixation between the first connecting port and the first coil end can be contacted.

[0063] By applying the scheme of the embodiments of the present application, since the flexible Rogowski coil can be arbitrarily bent and the joint with the connector can rotate 360°, the current measuring device can directly measure irregular objects and adapt to various measurement environment requirements, and the flexible Rogowski coil is convenient and easy to install and disassemble, has a long service life, and has a simple structure and low manufacturing and material costs.

[0064] The above is a schematic scheme of a current measuring device of the embodiment. It should be noted that the technical scheme of the current measuring device belongs to the same concept as the technical scheme of the flexible Rogowski coil described above, and the details of the technical scheme of the current measuring device that are not described in detail can be referred to the description of the technical scheme of the flexible Rogowski coil.

[0065] Corresponding to the above-mentioned flexible Rogowski coil embodiment, the present application also provides a current measuring system embodiment, Figure 6 A structural schematic diagram of a current measuring system provided by an embodiment of the present application is shown. As shown in Figure 6 The current measuring system 600 includes a device to be measured 602 and a current measuring device 604, and the current measuring device 604 includes a flexible Rogowski coil 6042.

[0066] By applying the scheme of the embodiments of the present application, since the flexible Rogowski coil can be arbitrarily bent and the joint with the connector can rotate 360°, the current measuring system can directly measure irregular devices to be measured and adapt to various measurement environment requirements, and the flexible Rogowski coil is convenient and easy to install and disassemble, has a long service life, and has a simple structure and low manufacturing and material costs.

[0067] The above is a schematic scheme of a current measuring system of the embodiment. It should be noted that the technical scheme of the current measuring system belongs to the same concept as the technical scheme of the flexible Rogowski coil described above, and the details of the technical scheme of the current measuring system that are not described in detail can be referred to the description of the technical scheme of the flexible Rogowski coil.

[0068] The above-described embodiments of the application have special structure and can produce special results. Other embodiments are within the scope of the following claims. In some cases, acts or steps recited in the claims can occur in a different order and still accomplish the desired results. Also, some steps can be performed concurrently, in some cases, some steps can be performed by different entities than what is described within the embodiments. In some cases, portions of the described embodiments can be implemented by software instructions, or by hardware, or by a combination of hardware and software. In some embodiments, the described steps can be ordered differently, or can be executed concurrently, and still achieve the desired results.

[0069] Those skilled in the art should know that the embodiments described in the present application are all preferred embodiments, and the actions and modules involved are not necessarily essential to the embodiments of the present application. In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0070] The preferred embodiments of the present application disclosed above are only to help explain the present application. The embodiments do not describe all the details and limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and use the present application.

Claims

1. A flexible Roebel coil, characterized in that, The flexible coil includes a first coil end and a second coil end, the first coil end includes a first wire core and a first enameled wire, the second coil end includes a second wire core and a second enameled wire, the connector includes a first connecting port, a second connecting port and a third connecting port, the lead-out wire includes a lead-out wire core and a lead-out wire shielding layer; The first coil end is connected with the first connecting port, the second coil end is connected with the second connecting port, the lead-out wire is connected with the third connecting port, the first wire core is connected with the first enameled wire, the second wire core is connected with the lead-out wire core, and the second enameled wire is connected with the lead-out wire shielding layer.

2. The flexible Rogowski coil of claim 1, wherein, The first connecting port is provided with a releasing structure for releasing the first coil end.

3. The flexible Rogowski coil of claim 2, wherein, The connector includes a three-way quick-connect pneumatic connector, and the releasing structure includes a three-way connector releasing ring.

4. The flexible Rogowski coil of claim 1, wherein, The first wire core and the first enameled wire are connected at a first connecting point, the second wire core and the lead-out wire core are connected at a second connecting point, and the second enameled wire and the lead-out wire shielding layer are connected at a third connecting point.

5. The flexible Rogowski coil of claim 1, wherein, The periphery of the first coil end and the second coil end is covered with an insulating material, the diameter of the first coil end covered with the insulating material is less than or equal to the diameter of the first connecting port, and the diameter of the second coil end covered with the insulating material is less than or equal to the diameter of the second connecting port.

6. The flexible Rogowski coil of claim 1, wherein, The second coil end is fixed to the second connecting port by a first fixing material, and the lead-out wire is fixed to the third connecting port by a second fixing material.

7. The flexible ROEBEL coil according to any one of claims 1 to 6, characterized in that, The flexible coil further includes a flexible framework, the first enameled wire is wound around one end of the flexible framework to form the first coil end, and the second enameled wire is wound around the other end of the flexible framework to form the second coil end.

8. The flexible ROEBEL coil according to any one of claims 1 to 6, characterized in that, The lead-out wire further includes a lead-out wire insulating layer.

9. A current measuring device, characterized by The flexible coil includes a first coil end and a second coil end, the first coil end includes a first wire core and a first enameled wire, the second coil end includes a second wire core and a second enameled wire, the connector includes a first connecting port, a second connecting port and a third connecting port, the lead-out wire includes a lead-out wire core and a lead-out wire shielding layer; 10. A current measurement system characterized by, The first coil end is connected with the first connecting port, the second coil end is connected with the second connecting port, the lead-out wire is connected with the third connecting port, the first wire core is connected with the first enameled wire, the second wire core is connected with the lead-out wire core, and the second enameled wire is connected with the lead-out wire shielding layer. The first connecting port is provided with a releasing structure for releasing the first coil end. The connector includes a three-way quick-connect pneumatic connector, and the releasing structure includes a three-way connector releasing ring. The first wire core and the first enameled wire are connected at a first connecting point, the second wire core and the lead-out wire core are connected at a second connecting point, and the second enameled wire and the lead-out wire shielding layer are connected at a third connecting point. The periphery of the first coil end and the second coil end is covered with an insulating material, the diameter of the first coil end covered with the insulating material is less than or equal to the diameter of the first connecting port, and the diameter of the second coil end covered with the insulating material is less than or equal to the diameter of the second connecting port. The second coil end is fixed to the second connecting port by a first fixing material, and the lead-out wire is fixed to the third connecting port by a second fixing material. The flexible coil further includes a flexible framework, the first enameled wire is wound around one end of the flexible framework to form the first coil end, and the second enameled wire is wound around the other end of the flexible framework to form the second coil end. The lead-out wire further includes a lead-out wire insulating layer. The flexible coil includes a first coil end and a second coil end, the first coil end includes a first wire core and a first enameled wire, the second coil end includes a second wire core and a second enameled wire, the connector includes a first connecting port, a second connecting port and a third connecting port, the lead-out wire includes a lead-out wire core and a lead-out wire shielding layer; The first coil end is connected with the first connecting port, the second coil end is connected with the second connecting port, the lead-out wire is connected with the third connecting port, the first wire core is connected with the first enameled wire, the second wire core is connected with the lead-out wire core, and the second enameled wire is connected with the lead-out wire shielding layer.

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