Current sensor

Abstract

The utility model relates to a current sensor, which comprises an assembly part, a magnetic core, a coil and a circuit board, and is characterized in that the assembly part is provided with an installation space; the magnetic core is arranged in the mounting space; the coil is wound outside the assembly part; the circuit board is electrically connected with the coil, the assembly part is provided with a first abutting part, the first abutting part abuts against the circuit board so that a first gap can be formed between the assembly part and the circuit board, the coil penetrates through the first gap, and the part, arranged in the first gap, of the coil is in clearance fit with the circuit board. And the coil wound outside the assembly part can penetrate through the first gap and is not extruded by the circuit board, so that the circuit board is prevented from scratching or wearing the surface of the coil, and the detection accuracy of the current sensor is ensured.

Description

Current sensor Technical Field

[0001] This application relates to the field of sensor technology, and in particular to a current sensor. Background Technology

[0002] A current sensor is a device used to detect information such as the magnitude of current in a conductor. When using a current sensor, the conductor to be tested needs to be placed in the detection area of ​​the current sensor. When current flows through the conductor, a magnetic field is generated around the conductor. Under the influence of the magnetic field, the magnetic core of the current sensor concentrates the magnetic lines of force at the air gap of the magnetic core. The magnetic field detection element can detect the magnetic induction intensity at the air gap. Based on the magnitude of the magnetic induction intensity, the magnitude of the current flowing through the conductor can be deduced, thereby realizing the detection of the current magnitude of the conductor.

[0003] When assembling a current sensor, the magnetic field detection element needs to be placed in the air gap of the magnetic core. However, this method can cause interference between the circuit board and the coil wound around the outside of the magnetic core. The circuit board can scratch or wear the surface of the coil, thus affecting the detection accuracy of the current sensor. Summary of the Invention

[0004] Therefore, it is necessary to provide a current sensor that addresses the problem that circuit boards in traditional technologies can scratch or wear the surface of coils, thereby affecting the detection accuracy of current sensors.

[0005] The technical solution is as follows:

[0006] One embodiment provides a current sensor, including:

[0007] An assembly having an installation space;

[0008] A magnetic core, wherein the magnetic core is disposed within the mounting space;

[0009] A coil, the coil being wound around the outside of the assembly;

[0010] The circuit board is electrically connected to the coil. The assembly is provided with a first abutting part, which abuts against the circuit board to form a first gap between the assembly and the circuit board. The coil passes through the first gap, and the portion of the coil in the first gap is in clearance fit with the circuit board.

[0011] In the aforementioned current sensor, the magnetic core is disposed within the mounting space of the assembly, and the coil is wound around the outside of the assembly and connected to the circuit board to complete the assembly of the electromagnet. The first abutting part of the assembly abuts against the circuit board, thereby forming a first gap between the assembly and the abutting part. In this way, the coil wound around the outside of the assembly can pass through the first gap and fit with the gap of the circuit board, so that the part of the coil located in the first gap will not be squeezed by the circuit board, preventing the circuit board from scratching or wearing the surface of the coil, and ensuring the detection accuracy of the current sensor.

[0012] In one embodiment, the assembly has a mounting through hole on the side facing the circuit board, the mounting through hole communicating with the mounting space, the circuit board is provided with a magnetic field detection element, the magnetic field detection element passes through the mounting through hole and is located in the mounting space, the magnetic core has an air gap, and the magnetic field detection element is located in the air gap.

[0013] The magnetic core, which is installed in the installation space, has an air gap. The magnetic field detection element, which is installed on the circuit board, passes through the mounting hole of the assembly and is located in the air gap of the magnetic core to detect the magnetic induction intensity at the air gap, thereby realizing the detection of the current of the conductor under test.

[0014] In one embodiment, the current sensor further includes a receiving member disposed within the mounting space and having a receiving cavity. The position of the receiving member corresponds to the position of the air gap, and the receiving cavity communicates with the mounting through hole. The magnetic field detection element is disposed within the receiving cavity.

[0015] The position of the housing corresponds to the position of the air gap. The magnetic field detection element can enter the housing cavity of the housing through the mounting through hole so that the magnetic field detection element is located in the air gap of the magnetic core. The housing can play a certain protective role for the magnetic field detection element, preventing external components such as the magnetic core from bumping and damaging the magnetic field detection element.

[0016] In one embodiment, the receiving member is provided with a reinforcement, and the mounting space has opposing first and second sidewalls, the reinforcement being connected to at least one of the first and second sidewalls.

[0017] The reinforcing part of the receiving member is connected to at least one of the first side wall and the second side wall of the mounting space, thereby increasing the strength of the receiving member and preventing damage to the receiving member.

[0018] In one embodiment, the assembly is provided with a first electrical connection portion and a second electrical connection portion, the coil has a first connection end and a second connection end, the first connection end is electrically connected to the first electrical connection portion, the second connection end is disposed on the second electrical connection portion and electrically connected, and both the first electrical connection portion and the second electrical connection portion are electrically connected to the circuit board.

[0019] The first connecting end of the coil is electrically connected to the first electrical connecting part on the assembly, and the second connecting end of the coil is electrically connected to the second electrical connecting part on the assembly. Both the first and second electrical connecting parts can be electrically connected to the circuit board, thereby realizing the electrical connection between the coil and the circuit board. With this configuration, when assembling the current sensor, the coil is first wound on the assembly, and the first and second connecting ends of the coil are electrically connected to the first and second electrical connecting parts respectively. Finally, the first and second electrical connecting parts are electrically connected to the circuit board, thereby simplifying the assembly steps of the current sensor and ensuring the electrical connection effect between the coil and the circuit board.

[0020] In one embodiment, the first electrical connection portion includes a first pin, the second electrical connection portion includes a second pin, the circuit board has a first socket and a second socket, the first pin is disposed in the first socket, the second pin is disposed in the second socket, the first connecting end is wrapped around the first pin and located in the first gap, the first connecting end is spaced apart from the circuit board, the second connecting end is wrapped around the second pin and located in the first gap, and the second connecting end is spaced apart from the circuit board.

[0021] The first and second connecting ends of the coil are wound around the first and second pins, respectively. The first and second pins are then placed in the first and second sockets of the circuit board, respectively. This not only enables the electrical connection between the coil and the circuit board, but also allows the assembly to be assembled with the circuit board. Furthermore, due to the existence of the first gap, after the circuit board and the assembly are assembled, the first and second connecting ends of the coil can be spaced apart from the circuit board, preventing the circuit board from causing wear to the first or second connecting ends of the coil.

[0022] In one embodiment, the assembly is provided with a mounting portion that is connected to the circuit board.

[0023] The mounting part of the assembly is connected to the circuit board, thereby realizing the assembly between the assembly and the circuit board.

[0024] In one embodiment, the mounting portion is provided with a third pin, the circuit board has a third socket, the third pin is disposed in the third socket, and the end of the mounting portion away from the mounting accessory abuts against the circuit board; or...

[0025] The mounting part has a third socket, the circuit board has a third pin, the third pin is located in the third socket, and the end of the mounting part away from the mounting part abuts against the circuit board.

[0026] The third pin is located in the third socket to enable assembly between the assembly and the circuit board. At the same time, the end of the mounting part away from the assembly can also abut against the circuit board, so that the circuit board and the assembly form a first gap. The coil wound around the outside of the assembly can pass through the first gap without being squeezed by the circuit board, preventing the circuit board from scratching or abrading the surface of the coil.

[0027] In one embodiment, the assembly includes an assembly base and an assembly part. The assembly base has an assembly groove, and a detection through hole is formed in the bottom wall of the assembly groove. A detection channel is formed inside the assembly part. The assembly part is disposed in the assembly groove. One end of the detection channel communicates with the detection through hole, and the other end of the detection channel faces outward from the assembly groove. The side wall of the assembly groove, the bottom wall of the assembly groove, and the outer wall of the assembly part surround the installation space. The coil passes through the detection channel, the detection through hole, and the first gap. The first abutment part is disposed on the assembly base.

[0028] The first abutting part located on the mounting base can abut against the circuit board, so that a first gap is formed between the mounting base and the circuit board. The coil is wound on the mounting part and passes through the detection channel, the detection through hole and the first gap. The conductor to be tested can enter one end of the detection channel through the detection through hole and exit from the other end of the detection channel to realize the current detection of the conductor to be tested.

[0029] In one embodiment, the assembly further includes a cover plate that covers the side of the magnetic core facing out of the assembly slot.

[0030] The cover plate can cover the side of the magnetic core facing out of the mounting slot, thus preventing the sharp edges of the magnetic core from scratching the coil when the coil is wound around the outside of the assembly. In addition, it can also prevent the coil from directly contacting the magnetic core, preventing the surface of the coil from aging due to the high temperature generated by the magnetic core, and improving the service life of the current sensor.

[0031] In one embodiment, the current sensor further includes a housing having a mounting groove, wherein the mounting accessories, the magnetic core, the coil, and the circuit board are all disposed within the mounting groove, the inner wall of the mounting groove is provided with a first positioning part, and the circuit board is provided with a second positioning part, wherein the first positioning part and the second positioning part are assembled together.

[0032] The first positioning part located on the inner wall of the mounting groove and the second positioning part of the circuit board are assembled to realize the assembly between the circuit board and the housing, thereby installing the assembly, magnetic core, coil and circuit board in the mounting groove of the housing to protect the assembly, magnetic core, coil and circuit board.

[0033] In one embodiment, the first positioning part is provided with a positioning post, and the second positioning part is provided with a positioning hole, the positioning post and the positioning hole being assembled; or...

[0034] The first positioning part is provided with a positioning hole, and the second positioning part is provided with a positioning post, wherein the positioning post is assembled with the positioning hole; or

[0035] The first positioning part is provided with a first positioning post and a first positioning hole, and the second positioning part is provided with a second positioning post and a second positioning hole. The first positioning post is assembled with the second positioning hole, and the first positioning hole is assembled with the second positioning post.

[0036] The circuit board is installed in the mounting slot of the housing by assembling the positioning pins and positioning holes, which is low in implementation cost and reliable in installation effect.

[0037] In one embodiment, the assembly is located between the circuit board and the bottom wall of the mounting groove. The assembly is further provided with a second abutting portion, which abuts against the bottom wall of the mounting groove to form a second gap between the assembly and the bottom wall of the mounting groove. The coil passes through the second gap, and the portion of the coil disposed in the second gap is in clearance fit with the bottom wall of the mounting groove.

[0038] The assembly is located between the circuit board and the bottom wall of the mounting slot to protect the assembly and the coil. In addition, the second abutting part of the assembly abuts against the bottom wall of the mounting slot, thereby forming a second gap between the assembly and the bottom wall of the mounting slot. The portion of the coil located in the second gap is fitted with the bottom wall of the mounting slot. In this way, the coil wound around the outside of the assembly can pass through the second gap without being squeezed by the bottom wall of the mounting slot, preventing the bottom wall of the mounting slot from scratching or wearing the surface of the coil and ensuring the detection accuracy of the current sensor. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 is a schematic diagram of the first gap and the second gap in one embodiment of this application.

[0041] Figure 2 is a schematic diagram of the first abutting part abutting against the circuit board in one embodiment of this application.

[0042] Figure 3 is a schematic diagram of the assembly disposed on the circuit board in one embodiment of this application.

[0043] Figure 4 is a schematic diagram of the structure of the coil wound on the assembly in one embodiment of this application.

[0044] Figure 5 is a schematic diagram of the circuit board structure in one embodiment of this application.

[0045] Figure 6 is a schematic diagram of the assembly structure in one embodiment of this application.

[0046] Figure 7 is a schematic diagram of the magnetic core structure in one embodiment of this application.

[0047] Figure 8 is a schematic diagram of the assembly of the cover plate and the fittings in one embodiment of this application.

[0048] Figure 9 is a schematic diagram of the assembly of the fittings and cover plate after assembly in one embodiment of this application.

[0049] Figure 10 is a structural schematic diagram of the assembly from another angle in one embodiment of this application.

[0050] Figure 11 is a schematic diagram of the outer shell structure in one embodiment of this application.

[0051] Figure 12 is a schematic diagram of the structure of the mounting accessories, magnetic core and circuit board disposed in the mounting groove in one embodiment of this application.

[0052] Figure 13 is a schematic diagram of the structure after the outer shell is sealed with glue in one embodiment of this application.

[0053] Attached image annotations:

[0054] 100. Assembly part; 111. First abutment part; 112. Second abutment part; 120. Installation space; 121. First side wall; 122. Second side wall; 130. Assembly part; 131. Inspection channel; 140. Mounting through hole; 151. First electrical connection part; 152. Second electrical connection part; 160. Mounting base; 170. Mounting part; 171. Third pin; 180. Assembly base; 181. Assembly groove; 182. Inspection through hole; 190. Cover plate; 191. Clearance gap; 200. Magnetic core; 210. Air 300, Coil; 310, First connecting end; 320, Second connecting end; 400, Circuit board; 410, Magnetic field detection element; 420, First detection port; 431, First socket; 432, Second socket; 433, Third socket; 440, Connector; 450, First positioning part; 510, First gap; 520, Second gap; 600, Receiving part; 610, Reinforcing part; 700, Outer shell; 710, Second positioning part; 720, Mounting groove; 730, Second detection port; 740, Sealant. Detailed Implementation

[0055] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0061] Please refer to Figures 1 to 7. One embodiment of this application provides a current sensor, including an assembly 100, a magnetic core 200, a coil 300, and a circuit board 400. The assembly 100 has an installation space 120; the magnetic core 200 is disposed within the installation space 120; the coil 300 is wound around the outside of the assembly 100; the circuit board 400 is electrically connected to the coil 300. The assembly 100 is provided with a first abutting portion 111, which abuts against the circuit board 400 to form a first gap 510 between the assembly 100 and the circuit board 400. The coil 300 passes through the first gap 510, and the portion of the coil 300 disposed in the first gap 510 is in clearance fit with the circuit board 400.

[0062] In the aforementioned current sensor, the magnetic core 200 is disposed within the mounting space 120 of the assembly 100, and the coil 300 is wound around the outside of the assembly 100 and connected to the circuit board 400 to complete the assembly of the electromagnet. The first abutting part 111 of the assembly 100 abuts against the circuit board 400, thereby forming a first gap 510 between the assembly 100 and the abutting part. In this way, the coil 300 wound around the outside of the assembly 100 can pass through the first gap 510 and fit with the circuit board 400 with a gap, so that the part of the coil 300 disposed in the first gap 510 is not squeezed by the circuit board 400, preventing the circuit board 400 from scratching or wearing the surface of the coil 300, and ensuring the detection accuracy of the current sensor.

[0063] For illustrative purposes, the coil 300 is typically made of enameled wire, with the outer layer of the enameled wire serving as insulation. In conventional technology, during the assembly of a current sensor, the insulation of the enameled wire comes into contact with the circuit board 400, causing wear. Once the insulation is worn, it can cause a short circuit in the coil 300, thus affecting the detection accuracy of the current sensor. To prevent wear on the insulation of the coil 300 due to contact with the circuit board 400, in this application, the first abutment portion 111 separates the assembly 100 from the circuit board 400. Thus, the coil 300 can pass through the first gap 510 between the assembly 100 and the circuit board 400 and be wound around the outside of the assembly 100. The certain distance between the coil 300 and the circuit board 400 prevents the coil 300 from being squeezed by the circuit board 400, which could cause scratches or wear on the insulation, thereby preventing a short circuit and ensuring the detection accuracy of the current sensor.

[0064] Furthermore, the width of the first gap 510 should be greater than the cross-sectional diameter of the enameled wire used to make the coil 300, so that when the enameled wire is threaded through the first gap 510, there can be a certain distance between it and the circuit board 400, preventing the circuit board 400 from squeezing the enameled wire and causing the insulation to be scratched.

[0065] In one embodiment, the first abutting portion 111 is disposed toward the circuit board 400 to achieve abutment against the circuit board 400.

[0066] In one embodiment, the magnetic core 200 and the bottom wall of the mounting space 120 are fixed by dispensing adhesive.

[0067] Please refer to Figures 6 to 8. In one embodiment, the assembly 100 has a detection channel 131 for the conductor to be tested to pass through. The mounting space 120 surrounds the outer periphery of the detection channel 131. The magnetic core 200 is annular and disposed within the mounting space 120. The annular magnetic core 200 is disposed around the outside of the detection channel 131.

[0068] Please refer to Figures 3 to 5. In one embodiment, the mounting fitting 100 has a mounting through hole 140 on the side facing the circuit board 400. The mounting through hole 140 communicates with the mounting space 120. The circuit board 400 is provided with a magnetic field detection element 410. The magnetic field detection element 410 passes through the mounting through hole 140 and is located in the mounting space 120. The magnetic core 200 has an air gap 210. The magnetic field detection element 410 is located in the air gap 210.

[0069] The magnetic core 200, which is installed in the installation space 120, has an air gap 210. The magnetic field detection element 410, which is installed on the circuit board 400, passes through the mounting through hole 140 of the assembly 100 and is located in the air gap 210 of the magnetic core 200, so as to detect the magnetic induction intensity at the air gap 210, thereby realizing the detection of the current of the conductor under test.

[0070] As an explanation, when a current-carrying conductor (such as a wire) is inserted into the detection channel 131, a magnetic field (hereinafter referred to as the primary magnetic field, i.e., the magnetic field generated around the current-carrying conductor) is generated around the conductor. The magnetic core 200 concentrates the magnetic lines of force at the air gap 210. The magnetic field detection element 410 can detect the magnetic induction intensity at the air gap 210. The amplifier circuit of the circuit board 400 can receive the magnetic induction intensity output by the magnetic field detection element 410 and amplify the magnetic induction intensity into a current signal to provide to the coil 300. The circuit board 400 drives the coil 300 to generate a reverse compensation current. When the reverse compensation current passes through the coil 300, it will generate a compensation magnetic field in the magnetic core 200 that is equal in magnitude and opposite in direction to the primary magnetic field. The compensation magnetic field can cancel the primary magnetic field, so that the air gap 210 maintains zero magnetic flux and maintains magnetic balance. The magnitude of the compensation current reflects the current carried by the conductor under test, thereby realizing the detection of the current of the conductor under test.

[0071] In one embodiment, the magnetic field detection element 410 includes, but is not limited to, Hall effect sensors, magnetic induction sensors, magnetic force sensors, magnetoresistive sensors, etc., which will not be described in detail here.

[0072] Please refer to Figures 3 and 5. In one embodiment, the circuit board 400 is located on one side of the assembly 100 and is provided with a first detection port 420. The position of the first detection port 420 corresponds to the position of the detection channel 131. The conductor to be tested can pass through the first detection port 420 and the detection channel 131. This arrangement makes the overall structure of the current sensor more compact and is conducive to the miniaturization of the current sensor.

[0073] Please refer to Figures 6 to 9. In one embodiment, the current sensor further includes a receiving member 600, which is disposed in the mounting space 120 and has a receiving cavity. The position of the receiving member 600 corresponds to the position of the air gap 210. The receiving cavity communicates with the mounting through hole 140, and the magnetic field detection element 410 is disposed in the receiving cavity.

[0074] The position of the receiving component 600 corresponds to the position of the air gap 210. The magnetic field detection element 410 can enter the receiving cavity of the receiving component 600 through the mounting through hole 140, so that the magnetic field detection element 410 is located in the air gap 210 of the magnetic core 200. The receiving component 600 can play a certain protective role for the magnetic field detection element 410, preventing external components such as the magnetic core 200 from bumping and damaging the magnetic field detection element 410.

[0075] Furthermore, the outer wall of the accommodating member 600 is connected to at least one side wall of the mounting space 120 to ensure the installation strength of the accommodating member 600 within the mounting space 120.

[0076] Please refer to Figures 6 to 9. In one embodiment, the receiving member 600 is provided with a reinforcing portion 610, and the mounting space 120 has opposing first sidewalls 121 and second sidewalls 122. The reinforcing portion 610 is connected to at least one of the first sidewalls 121 and the second sidewalls 122.

[0077] The reinforcing portion 610 provided in the receiving member 600 is connected to at least one of the first side wall 121 and the second side wall 122 of the mounting space 120, thereby improving the strength of the receiving member 600 and preventing damage to the receiving member 600.

[0078] Please refer to Figures 6 to 9. In one embodiment, the reinforcing part 610 includes a reinforcing strip disposed on the side of the receiving member 600 away from the mounting through hole 140. One end of the reinforcing strip is connected to the first sidewall 121, and the other end of the reinforcing strip is connected to the second sidewall 122.

[0079] Understandably, in other embodiments, reinforcing strips can also be provided on the sidewall of the receiver 600; the strength of the receiver 600 can also be further improved by increasing the number of reinforcing strips, which will not be elaborated here.

[0080] Please refer to Figures 1 to 4. In one embodiment, the assembly 100 is provided with a first electrical connection portion 151 and a second electrical connection portion 152. The coil 300 has a first connection end 310 and a second connection end 320. The first connection end 310 is electrically connected to the first electrical connection portion 151, and the second connection end 320 is provided at the second electrical connection portion 152 and electrically connected. Both the first electrical connection portion 151 and the second electrical connection portion 152 are electrically connected to the circuit board 400.

[0081] The first connecting end 310 of the coil 300 is electrically connected to the first electrical connecting part 151 on the assembly 100, and the second connecting end 320 of the coil 300 is electrically connected to the second electrical connecting part 152 on the assembly 100. Both the first electrical connecting part 151 and the second electrical connecting part 152 can be electrically connected to the circuit board 400, thereby realizing the electrical connection between the coil 300 and the circuit board 400. With this configuration, when assembling the current sensor, the coil 300 is first wound around the assembly 100, and the first connecting end 310 and the second connecting end 320 of the coil 300 are electrically connected to the first electrical connecting part 151 and the second electrical connecting part 152 respectively. Finally, the first electrical connecting part 151 and the second electrical connecting part 152 are electrically connected to the circuit board 400, thereby simplifying the assembly steps of the current sensor and ensuring the electrical connection effect between the coil 300 and the circuit board 400.

[0082] Furthermore, the first electrical connection portion 151 and the second electrical connection portion 152 are respectively disposed on both sides of the mounting through hole 140. In this way, when the coil 300 is wound around the assembly 100 and electrically connected to the first electrical connection portion 151 and the second electrical connection portion 152, it can bypass the mounting through hole 140, so that the magnetic field detection element 410 can move through the mounting through hole 140 to the air gap 210 of the magnetic core 200.

[0083] Furthermore, the first electrical connection part 151 and the second electrical connection part 152 are made of conductive materials such as copper and aluminum, thereby realizing the electrical connection between the coil 300 and the circuit board 400.

[0084] Please refer to Figures 1 to 4. In one embodiment, the first electrical connection portion 151 includes a first pin, the second electrical connection portion 152 includes a second pin, the circuit board 400 has a first socket 431 and a second socket 432, the first pin is disposed in the first socket 431, the second pin is disposed in the second socket 432, the first connecting end 310 is wrapped around the first pin and located in the first gap 510, the first connecting end 310 is spaced apart from the circuit board 400, the second connecting end 320 is wrapped around the second pin and located in the first gap 510, the second connecting end 320 is spaced apart from the circuit board 400.

[0085] The first connecting end 310 and the second connecting end 320 of the coil 300 are respectively wound around the first pin and the second pin, and then the first pin and the second pin are respectively disposed in the first socket 431 and the second socket 432 of the circuit board 400. In this way, not only can the coil 300 be electrically connected to the circuit board 400, but the assembly 100 can also be assembled with the circuit board 400. In addition, due to the existence of the first gap 510, after the circuit board 400 and the assembly 100 are assembled, the first connecting end 310 and the second connecting end 320 of the coil 300 can be spaced apart from the circuit board 400 to prevent the circuit board 400 from causing wear to the first connecting end 310 or the second connecting end 320 of the coil 300.

[0086] As an explanation, in the above embodiments, the first connecting end 310 and the second connecting end 320 of the coil 300 can be the two opposite ends of the coil 300 in the unfolded state, or the two ends of the coil 300 when it is wound around the assembly 100, which will not be elaborated here.

[0087] Please refer to Figures 1 to 4 and Figures 6 to 10. In one embodiment, the assembly 100 is further provided with a mounting base 160. The mounting base 160 is located on the side of the assembly 100 facing the circuit board 400. The first abutment 111, the first pin, and the second pin are all disposed on the mounting base 160. The mounting through hole 140 is opened in the mounting base 160 and is located between the first pin and the second pin. This arrangement can improve the mounting strength of the first abutment 111, the first pin, and the second pin on the assembly 100. At the same time, due to the presence of the mounting base 160, the distance between the coil 300 wound on the assembly 100 and the circuit board 400 is larger, thereby further preventing the circuit board 400 from scratching the coil 300.

[0088] Please refer to Figures 3 and 4. In one embodiment, the assembly 100 is provided with a mounting portion 170, which is connected to the circuit board 400.

[0089] The mounting part 170 of the assembly 100 is connected to the circuit board 400, thereby realizing the assembly between the assembly 100 and the circuit board 400.

[0090] Alternatively, the connection between the mounting part 170 and the circuit board 400 can be achieved by welding, bonding, screw fixing, etc., and no specific limitation is made here.

[0091] Please refer to Figures 1, 3 and 4. In one embodiment, the mounting part 170 is provided with a third pin 171, the circuit board 400 is provided with a third socket 433, the third pin 171 is provided in the third socket 433, and the end of the mounting part 170 away from the mounting accessory 100 abuts against the circuit board 400.

[0092] The third pin 171 is located in the third socket 433 to realize the assembly between the component 100 and the circuit board 400. At the same time, the end of the mounting part 170 away from the component 100 can also abut against the circuit board 400, so that the circuit board 400 and the component 100 form a first gap 510. The coil 300 wound around the outside of the component 100 can pass through the first gap 510 without being squeezed by the circuit board 400, thus preventing the circuit board 400 from scratching or wearing the surface of the coil 300.

[0093] As an alternative embodiment to the above embodiment, the mounting part 170 is provided with a third socket 433, the circuit board 400 is provided with a third pin 171, the third pin 171 is provided in the third socket 433, and the end of the mounting part 170 away from the mounting accessory 100 abuts against the circuit board 400.

[0094] Furthermore, the mounting section 170 is provided with at least two parts and is arranged circumferentially along the detection channel 131, the third pin 171 is provided with at least two parts and is arranged one-to-one with the mounting section 170, and the third socket 433 is provided with at least two parts and is arranged one-to-one with the third pin 171; such arrangement can improve the connection strength between the circuit board 400 and the assembly 100.

[0095] Referring to Figure 6, in one embodiment, the assembly 100 includes an assembly base 180 and an assembly part 130. The assembly base 180 has an assembly groove 181, and a detection through hole 182 is formed on the bottom wall of the assembly groove 181. A detection channel 131 is formed inside the assembly part 130. The assembly part 130 is disposed in the assembly groove 181. One end of the detection channel 131 communicates with the detection through hole 182, and the other end of the detection channel 131 faces outward from the assembly groove 181. The side wall of the assembly groove 181, the bottom wall of the assembly groove 181, and the outer wall of the assembly part 130 surround to form an installation space 120. The coil 300 passes through the detection channel 131, the detection through hole 182, and the first gap 510. The first abutment part 111 is disposed on the assembly base 180.

[0096] The first abutting part 111 provided on the mounting base 180 can abut against the circuit board 400, so that a first gap 510 is formed between the mounting base 180 and the circuit board 400. The coil 300 is wound on the mounting part 100 and passes through the detection channel 131, the detection through hole 182 and the first gap 510. The conductor to be tested can enter one end of the detection channel 131 through the detection through hole 182 and exit from the other end of the detection channel 131 to realize the current detection of the conductor to be tested.

[0097] Further, referring to Figure 6, the assembly part 130 is annular and has a detection channel 131 inside. The annular assembly part 130 is disposed on the bottom wall of the assembly groove 181, and the detection channel 131 of the assembly part 130 communicates with the detection through hole 182 on the bottom wall of the assembly groove 181 to form an annular mounting space 120. The annular mounting space 120 surrounds the detection channel 131 and is used to accommodate the magnetic core 200.

[0098] Referring to Figures 8 and 9, in one embodiment, the assembly 100 further includes a cover plate 190, which covers the side of the magnetic core 200 facing out of the assembly slot 181.

[0099] The cover plate 190 can cover the side of the magnetic core 200 facing out of the mounting groove 181. In this way, when the coil 300 is wound around the outside of the mounting part 100, the sharp edges of the magnetic core 200 can be prevented from scratching the coil 300. In addition, it can also prevent the coil 300 from directly contacting the magnetic core 200, prevent the surface of the coil 300 from aging due to the high temperature generated by the magnetic core 200, and improve the service life of the current sensor.

[0100] As an explanation, the magnetic core 200 is made of permalloy sheets stacked one by one, and each permalloy sheet has the same specifications. Therefore, the edges of the magnetic core 200 cannot be chamfered, otherwise there would be gaps between the edges of the permalloy sheets sandwiched in the middle. Thus, the edges of the magnetic core 200 have sharp corners. The cover plate 190 can cover the side of the magnetic core 200 facing out of the mounting groove 181 to cover the sharp corners of the magnetic core 200 and prevent the sharp corners of the magnetic core 200 from scratching the coil 300.

[0101] Further, please refer to Figures 8 and 9. The cover plate 190 has a clearance gap 191. The position of the clearance gap 191 corresponds to the position of the reinforcing part 610. When the cover plate 190 is placed on the side of the magnetic core 200 facing out of the mounting groove 181, the reinforcing part 610 on the receiving member 600 passes through the clearance gap 191. This arrangement can improve the space utilization rate within the installation space 120 and make the overall structure of the current sensor more compact.

[0102] In addition, the reinforcing part 610 can also limit the cover plate 190 to prevent the cover plate 190 from moving within the installation space 120.

[0103] In one embodiment, the shape of the cover plate 190 matches the shape of the mounting space 120, and the shape of the mounting space 120 matches the shape of the magnetic core 200 to prevent the magnetic core 200 from moving freely within the mounting space 120. Therefore, the shape of the cover plate 190 matches the shape of the magnetic core 200.

[0104] Furthermore, please refer to Figures 7 to 9. The shape of the cover plate 190 matches the shape of the magnetic core 200 and both are annular, which will not be described again here.

[0105] In one embodiment, the cover plate 190 and the magnetic core 200 are fixed together by dispensing adhesive.

[0106] Furthermore, to ensure the reliability of the cover plate 190, the cover plate 190 and the assembly 100 are also fixed by adhesive application.

[0107] Referring to Figure 10, in one embodiment, the cover plate 190 is flush with the edge of the mounting groove 181 to avoid scratching the coil 300.

[0108] Please refer to Figures 11 to 13. In one embodiment, the current sensor further includes a housing 700. The housing 700 has a mounting groove 720. The mounting accessory 100, magnetic core 200, coil 300, and circuit board 400 are all disposed in the mounting groove 720. The inner wall of the mounting groove 720 is provided with a first positioning part 450, and the circuit board 400 is provided with a second positioning part 710. The first positioning part 450 and the second positioning part 710 are assembled together.

[0109] The first positioning part 450 located on the inner wall of the mounting groove 720 and the second positioning part 710 of the circuit board 400 are assembled to realize the assembly between the circuit board 400 and the housing 700, thereby installing the assembly 100, the magnetic core 200, the coil 300 and the circuit board 400 in the mounting groove 720 of the housing 700 to protect the assembly 100, the magnetic core 200, the coil 300 and the circuit board 400.

[0110] Referring to Figure 12, in one embodiment, the housing 700 is provided with a second detection port 730. The position of the second detection port 730 corresponds to the position of the first detection port 420 and the detection channel 131. Thus, when the assembly 100, magnetic core 200, coil 300 and circuit board 400 are all disposed in the mounting groove 720, the conductor to be tested can pass through the second detection port 730, and then through the first detection port 420 and the detection channel 131, thereby realizing the detection of the current of the conductor to be tested.

[0111] Please refer to Figures 5, 11 and 12. In one embodiment, the first positioning part 450 is provided with a positioning post, and the second positioning part 710 is provided with a positioning hole. The positioning post and the positioning hole are assembled together.

[0112] As an alternative embodiment to the above embodiment, the first positioning part 450 is provided with a positioning hole, and the second positioning part 710 is provided with a positioning post, the positioning post being assembled with the positioning hole.

[0113] The circuit board 400 is installed in the mounting slot 720 of the housing 700 by assembling the positioning pins and positioning holes, which is low in implementation cost and reliable in installation effect.

[0114] In other alternative embodiments, the first positioning part 450 is provided with a first positioning post and a first positioning hole, and the second positioning part 710 is provided with a second positioning post and a second positioning hole, wherein the first positioning post is assembled with the second positioning hole, and the first positioning hole is assembled with the second positioning post.

[0115] This setup further ensures the effective installation between the circuit board 400 and the housing 700.

[0116] Please refer to Figures 11 and 12. In one embodiment, at least two positioning posts are provided, and at least two positioning holes are provided and are configured to correspond one-to-one with the positioning posts.

[0117] Please refer to Figures 1, 2 and 10. In one embodiment, the assembly 100 is located between the circuit board 400 and the bottom wall of the mounting groove 720. The assembly 100 is also provided with a second abutting part 112, which abuts against the bottom wall of the mounting groove 720 to form a second gap 520 between the assembly 100 and the bottom wall of the mounting groove 720. The coil 300 passes through the second gap 520, and the portion of the coil 300 disposed in the second gap 520 is in clearance fit with the bottom wall of the mounting groove 720.

[0118] The assembly 100 is located between the circuit board 400 and the bottom wall of the mounting groove 720 to protect the assembly 100 and the coil 300. In addition, the second abutting part 112 of the assembly 100 abuts against the bottom wall of the mounting groove 720, thereby forming a second gap 520 between the assembly 100 and the bottom wall of the mounting groove 720. The portion of the coil 300 disposed in the second gap 520 is in clearance fit with the bottom wall of the mounting groove 720. In this way, the coil 300 wound around the outside of the assembly 100 can pass through the second gap 520 without being squeezed by the bottom wall of the mounting groove 720, preventing the bottom wall of the mounting groove 720 from scratching or abrading the surface of the coil 300, and ensuring the detection accuracy of the current sensor.

[0119] Please refer to Figures 1 to 9. In one embodiment, one end of the second abutment 112 is disposed on the mounting base 160, and the other end of the second abutment 112 extends along the axial direction of the detection channel 131 to the end of the assembly 100 away from the circuit board 400, so as to achieve the abutment of the second abutment 112 against the bottom wall of the mounting groove 720.

[0120] Please refer to Figures 1 to 9. As an embodiment that can be implemented simultaneously with the above embodiments, one end of the second abutment 112 is connected to the end of the mounting part 170 away from the third pin 171, and the other end of the second abutment 112 extends along the axial direction of the detection channel 131 to the end of the assembly 100 away from the circuit board 400, so as to achieve the abutment of the second abutment 112 against the bottom wall of the mounting groove 720.

[0121] Please refer to Figure 12. In one embodiment, a connector 440 is provided on the side of the circuit board 400 away from the magnetic core 200. The connector 440 has several pins to realize the electrical connection between the circuit board 400 and external terminals.

[0122] Further, referring to Figure 13, a sealing body is provided within the mounting slot 720. The assembly 100, magnetic core 200, coil 300, and circuit board 400 are all embedded within the sealing body, and the connector 440 protrudes from the sealing body. The sealing body can fix the assembly 100, magnetic core 200, coil 300, and circuit board 400 within the mounting slot 720. The connector 440 protrudes from the sealing body to realize the electrical connection between the circuit board 400 inside the sealing body and an external device.

[0123] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0124] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A current sensor, characterized in that, include: The assembly has an installation space; the magnetic core is disposed within the installation space; A coil is wound around the outside of the assembly; a circuit board is electrically connected to the coil; the assembly has a first abutting part that abuts against the circuit board to form a first gap between the assembly and the circuit board; the coil passes through the first gap, and the portion of the coil in the first gap is in clearance fit with the circuit board.

2. The current sensor according to claim 1, characterized in that, The assembly has a mounting through hole on the side facing the circuit board, the mounting through hole is connected to the mounting space, the circuit board is provided with a magnetic field detection element, the magnetic field detection element passes through the mounting through hole and is located in the mounting space, the magnetic core has an air gap, and the magnetic field detection element is located in the air gap.

3. The current sensor according to claim 2, characterized in that, The current sensor further includes a receiving element, which is disposed within the mounting space and has a receiving cavity. The position of the receiving element corresponds to the position of the air gap. The receiving cavity communicates with the mounting through hole, and the magnetic field detection element is disposed within the receiving cavity.

4. The current sensor according to claim 3, characterized in that, The receiving member is provided with a reinforcing portion, and the mounting space has opposing first and second sidewalls, the reinforcing portion being connected to at least one of the first and second sidewalls.

5. The current sensor according to claim 1, characterized in that, The assembly is provided with a first electrical connection part and a second electrical connection part. The coil has a first connection end and a second connection end. The first connection end is electrically connected to the first electrical connection part, and the second connection end is disposed on the second electrical connection part and electrically connected. Both the first electrical connection part and the second electrical connection part are electrically connected to the circuit board.

6. The current sensor according to claim 5, characterized in that, The first electrical connection part includes a first pin, the second electrical connection part includes a second pin, the circuit board has a first socket and a second socket, the first pin is disposed in the first socket, the second pin is disposed in the second socket, the first connecting end is wrapped around the first pin and located in the first gap, the first connecting end is spaced apart from the circuit board, the second connecting end is wrapped around the second pin and located in the first gap, and the second connecting end is spaced apart from the circuit board.

7. The current sensor according to claim 1, characterized in that, The assembly is provided with a mounting part, which is connected to the circuit board.

8. The current sensor according to claim 7, characterized in that, The mounting part is provided with a third pin, the circuit board is provided with a third socket, the third pin is provided in the third socket, and the end of the mounting part away from the assembly abuts against the circuit board; or, the mounting part is provided with a third socket, the circuit board is provided with a third pin, the third pin is provided in the third socket, and the end of the mounting part away from the assembly abuts against the circuit board.

9. The current sensor according to claim 1, characterized in that, The assembly includes an assembly base and an assembly part. The assembly base has an assembly groove, and a detection through hole is formed in the bottom wall of the assembly groove. A detection channel is formed inside the assembly part. The assembly part is disposed in the assembly groove. One end of the detection channel communicates with the detection through hole, and the other end of the detection channel faces outward from the assembly groove. The side wall of the assembly groove, the bottom wall of the assembly groove, and the outer wall of the assembly part surround the installation space. The coil passes through the detection channel, the detection through hole, and the first gap. The first abutment part is disposed on the assembly base.

10. The current sensor according to claim 9, characterized in that, The assembly also includes a cover plate that covers the side of the magnetic core facing out of the assembly slot.

11. The current sensor according to claim 1, characterized in that, The current sensor also includes a housing with a mounting groove. The mounting accessories, the magnetic core, the coil, and the circuit board are all disposed in the mounting groove. The inner wall of the mounting groove is provided with a first positioning part, and the circuit board is provided with a second positioning part. The first positioning part and the second positioning part are assembled together.

12. The current sensor according to claim 11, characterized in that, The first positioning part is provided with a positioning post, and the second positioning part is provided with a positioning hole, wherein the positioning post is assembled with the positioning hole; or, the first positioning part is provided with a positioning hole, and the second positioning part is provided with a positioning post, wherein the positioning post is assembled with the positioning hole; or the first positioning part is provided with a first positioning post and a first positioning hole, and the second positioning part is provided with a second positioning post and a second positioning hole, wherein the first positioning post is assembled with the second positioning hole, and the first positioning hole is assembled with the second positioning post.

13. The current sensor according to claim 11, characterized in that, The assembly is located between the circuit board and the bottom wall of the mounting groove. The assembly is also provided with a second abutting part, which abuts against the bottom wall of the mounting groove to form a second gap between the assembly and the bottom wall of the mounting groove. The coil passes through the second gap, and the portion of the coil in the second gap is in clearance fit with the bottom wall of the mounting groove.

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