Coil assembly for fluxgate current sensor and fluxgate current sensor

Abstract

The coil assembly comprises a circuit board and a coil, at least two connecting parts are arranged on the circuit board at intervals, and the connecting parts are located on the side, close to the coil, of the circuit board. And the coil is electrically connected with the circuit board through the connecting part. The electromagnetic coil further comprises a closed magnetic core and a shell, the circuit board and the coil are located in the shell, and the coil is arranged around the closed magnetic core. The optimized design of the circuit board and the coil further ensures the stability of signal transmission between the coil and the circuit board, the magnetic field optimization effect of the closed magnetic core is combined, the anti-interference capability of the whole sensor is greatly improved, the overall performance and reliability of the sensor are improved, and the service life of the sensor is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to current sensor technical field, concretely relates to a coil assembly for fluxgate current sensor and fluxgate current sensor. BACKGROUND

[0002] The fluxgate current sensor plays a key role in industrial control, power system monitoring and many other fields. Its working principle is based on electromagnetic induction, which accurately measures the current size by detecting the magnetic field change, thereby realizing the monitoring and control of the current to ensure the normal operation of electrical equipment and the stability of the system.

[0003] The traditional fluxgate current sensor connects the coil and the circuit board in an indirect way, such as through L-shaped pins. Specifically, the coil is connected to one end of the L-shaped pin, and the other end of the L-shaped pin is connected to the circuit board. The two L-shaped pins are integrally injection molded through a fixed block and then clamped in the base. Although this connection method meets the basic electrical connection requirements to some extent, it has many drawbacks.

[0004] Firstly, the complex connection structure leads to a tedious assembly process, which requires the precise cooperation and installation of multiple components, increasing the assembly time and cost. Secondly, the more connection components and longer connection lines not only increase the resistance on the line, thereby significantly increasing the heat generation, but also easily cause signal attenuation and interference, reducing the measurement accuracy and stability of the sensor. Moreover, the high heat generation accelerates the aging of the components, shortens the service life of the sensor, and increases the energy consumption during long-term operation, which is not conducive to energy saving and environmental protection requirements. UTILITY MODEL CONTENTS

[0005] In view of the technical problems of complex assembly, high heat generation, high loss, and low energy efficiency of the traditional connection method of the coil and the circuit board in the prior art, the utility model provides a coil assembly for a fluxgate current sensor and a fluxgate current sensor, which improves the overall performance, reliability, and service life of the sensor.

[0006] The utility model provides a coil assembly for a fluxgate current sensor, which comprises a circuit board and a coil. At least two connection parts are arranged on the circuit board in a spaced manner. The connection parts are located on one side of the circuit board close to the coil. The coil is connected to the circuit board through the connection parts to realize electrical connection.

[0007] By adopting the technical scheme, the coil and the circuit board are connected without the help of additional connecting pieces, greatly simplifying the operation process of assembly, the connecting part interval setting part is located on the side of the coil close to the circuit board, making the assembly process more intuitive and simple; the setting of the connecting part on the circuit board provides a clear positioning point for the coil connection, ensuring the consistency and accuracy of the connection, enhancing the stability of the product performance; and effectively reducing energy consumption, improving the energy efficiency of the sensor, and reducing the influence of heat on the performance and service life of the element.

[0008] Preferably, the lead-out end of the coil is wound and connected to the connecting part.

[0009] By adopting the technical scheme, the coil is pulled to the connecting part position by a mechanical hand and wound around the connecting part for multiple turns, and the welding gun welds the coil and the connecting part, the contact area between the coil and the connecting part is significantly increased, which can better maintain the connection stability, effectively prevent the coil from being displaced or separated from the connecting part due to vibration, ensure the stability of the electrical connection of the sensor in harsh environments, and further ensure the continuity and accuracy of the measurement data.

[0010] Further preferably, the lead-out end of the coil is wound around the connecting part at least once.

[0011] By adopting the technical scheme, when the lead-out end of the coil is wound around the connecting part at least once, a ring-shaped mechanical constraint structure is formed, which makes the combination between the coil and the connecting part more closely and improves the connection stability.

[0012] Preferably, the lead-out end of the coil is directly connected to the connecting part.

[0013] By adopting the technical scheme, when the lead-out end of the coil is directly connected to the connecting part, there is no need for complex winding operation, which makes the assembly process more direct and simple and improves production efficiency.

[0014] Preferably, the connecting part is protrudingly arranged at the edge of the circuit board, the connecting part is provided as two, the extension end parts of the two connecting parts are non-parallel, and the position where the lead-out end of the coil is wound or connected on the connecting part is non-parallel.

[0015] By adopting the technical scheme, the connecting part is protrudingly arranged at the edge of the circuit board, the idle space around the circuit board is fully utilized, and the occupation of the valuable planar area inside the circuit board is avoided, which is helpful to realize the miniaturization of the sensor, facilitates heat dissipation, reduces the risk of performance degradation or damage of elements caused by overheating, and further improves the reliability and stability of the sensor; the non-parallel connection mode makes the current have a more reasonable distribution path during transmission from the coil to the circuit board, facilitates the installation of the sensor, reduces the installation difficulty, ensures the reliability of the sensor in complex use scenarios, and improves the applicability of the sensor in different devices.

[0016] Further preferably, the connecting part is suspended above the coil, and the distance between the connecting part and the coil in the vertical direction is 0.5-2 cm.

[0017] By adopting the technical scheme, when the connecting part is above the coil and maintains a certain distance, sufficient operation space is provided during installation, and the layout can effectively reduce the electromagnetic coupling between the connecting part and the coil, further improving the precision of the sensor in measuring weak current.

[0018] Further preferably, the connecting part includes a connecting rod and a blocking part, the connecting rod is protrudingly arranged on the circuit board, and the blocking part is located at one end of the connecting rod away from the circuit board.

[0019] By adopting the technical scheme, the blocking part provides an effective limiting structure for the lead-out end of the coil, ensuring the stability of the electrical connection of the sensor; the blocking part and the connecting rod cooperatively form a structure similar to a hook, increasing the connecting friction between the coil and the connecting part, further improving the reliability of the connection, and improving the connection stability.

[0020] Further preferably, a guide part is arranged at the connection between the connecting rod and the blocking part.

[0021] By adopting the technical scheme, when the lead-out end of the coil is connected to the connecting part, the guide part provides a smooth transition guide path, improving the assembly speed and the assembly yield of the product.

[0022] Preferably, a solder pad is arranged on the connecting part, and the lead-out end of the coil is welded and fixed to the solder pad.

[0023] By adopting the technical scheme, the solder pad serves as a conductive area on the connecting part, and provides a specially designed welding interface between the lead-out end of the coil and the circuit board. Through the welding process, the lead-out end of the coil and the solder pad form an atomic combination, which ensures the high strength and stability of the connection.

[0024] The utility model also proposes a kind of magnetic flux gate current sensor, including the coil assembly for the magnetic flux gate current sensor, still include closed magnetic core and shell, the circuit board and the coil are located in the shell, the coil is arranged around the closed magnetic core.

[0025] By adopting the above technical scheme, the optimization design of the circuit board and the coil further ensures the stability of signal transmission between the coil and the circuit board, and the magnetic field optimization effect of the closed magnetic core greatly improves the anti-interference ability of the whole sensor, improves the stability and reliability of the system.

[0026] Compared with the prior art, the utility model has the beneficial results that:

[0027] The coil and the circuit board are connected without the help of additional connecting pieces, greatly simplifying the operation process of assembly, the connecting part is arranged at the side of the circuit board close to the coil, so that the assembly process is more intuitive and simple;The setting of connecting part on the circuit board provides a clear positioning point for coil connection, ensures the consistency and accuracy of connection, enhances the stability of product performance;And effectively reduce energy consumption, improve the energy efficiency of sensor, reduce the influence of heating on element performance and service life. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings provide further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and serve to explain the principles of the utility model. It will be readily appreciated that other embodiments and many of the intended advantages of the embodiments will become better understood because they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale. The same reference numbers in different drawings refer to corresponding similar components.

[0029] Figure 1 The structure schematic view of the coil assembly for magnetic flux gate current sensor according to an embodiment of the utility model is shown;

[0030] Figure 2 The schematic view highlighting connecting part in the coil assembly for magnetic flux gate current sensor according to an embodiment of the utility model is shown;

[0031] Figure 3 For Figure 2 The enlarged structure schematic view of part A;

[0032] Figure 4 The structure schematic view of magnetic flux gate current sensor after removing upper cover according to an embodiment of the utility model is shown.

[0033] The meanings of the numbers in the figure are as follows: 1, circuit board; 2, coil; 3, connecting part; 31, connecting rod; 32, blocking part; 33, guiding part; 4, closed magnetic core; 5, shell. DETAILED DESCRIPTION

[0034] The utility model will be explained in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for the convenience of description.

[0035] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be explained in detail below in combination with the drawings and embodiments.

[0036] In the first aspect, the embodiments of the utility model disclose a coil assembly for a fluxgate current sensor, Figure 1 The structure schematic diagram of the coil assembly for the fluxgate current sensor according to an embodiment of the utility model is shown, as Figure 1 The coil assembly for the fluxgate current sensor includes a circuit board 1 and a coil 2, at least two connecting parts 3 are arranged at intervals on the circuit board 1, the connecting part 3 is located on the side of the circuit board 1 close to the coil 2, and the coil 2 is connected with the circuit board 1 to realize electrical connection through the connecting part 3.

[0037] In the scheme, the coil 2 is connected with the circuit board 1 without the help of additional connecting pieces, so that the operation process of assembly is greatly simplified, the connecting part 3 is arranged at intervals and located on the side of the circuit board 1 close to the coil 2, so that the assembly process is more intuitive and simple; the connecting part 3 arranged on the circuit board 1 provides a clear positioning point for the connection of the coil 2, ensures the consistency and accuracy of the connection, and enhances the stability of the product performance; and effectively reduces the energy consumption, improves the energy efficiency of the sensor, and reduces the influence of heating on the performance and service life of the element.

[0038] It should be specially noted that the welding between the lead-out end of the circuit board 1 and the coil 2 is represented by a rectangular block on the connecting part 3 in Figure 1 As shown in Figure 1 The welding shape only serves as a simple schematic and does not limit the protection scope.

[0039] Preferably, the connecting part 3 is protrudedly arranged at the edge of the circuit board 1, and the connecting part 3 is arranged in two, the extension ends of the two connecting parts 3 are non-parallel, and the positions where the lead-out ends of the coil 2 are wound or connected on the connecting part 3 are non-parallel. In the embodiment, the outer side is away from the center of the circuit board 1, and the inner side is close to the center of the circuit board 1, and the protruding length of the connecting part 3 on the outer side is greater than or equal to the protruding length of the connecting part 3 on the inner side.

[0040] The connecting part 3 is protrudedly arranged at the edge of the circuit board 1, and the connecting part 3 is arranged in two, the extension ends of the two connecting parts 3 are non-parallel, and the positions where the lead-out ends of the coil 2 are wound or connected on the connecting part 3 are non-parallel. In the embodiment, the outer side is away from the center of the circuit board 1, and the inner side is close to the center of the circuit board 1, and the protruding length of the connecting part 3 on the outer side is greater than or equal to the protruding length of the connecting part 3 on the inner side.

[0041] It should be noted that in other embodiments, the arrangement position and number of the connecting part 3 can be changed as needed. For example, the connecting part 3 can also be designed as a punching scheme at a desired position on the circuit board 1, and the punching is used to connect the lead-out end of the coil 2, and after welding and fixing, the same technical effect of electrical connection with the lead-out end of the coil 2 can be achieved. The number of punchings can be designed as needed, and will not be described in detail here.

[0042] Further preferably, as shown in Figure 1 , the connecting part 3 is suspended above the coil 2, and the vertical distance between the connecting part 3 and the coil 2 is 0.5-2 cm. In the embodiment, the vertical distance between the connecting part 3 and the coil 2 is 1 cm. When the connecting part 3 is located above the coil 2 and maintains a certain distance, sufficient operation space can be provided during installation, and the layout can effectively reduce the electromagnetic coupling between the connecting part 3 and the coil 2, further improving the precision of the sensor in measuring weak current.

[0043] In the embodiment, referring to Figure 2 and Figure 3 , the connecting part 3 includes a connecting rod 31 and a blocking part 32, the connecting rod 31 is protrudedly arranged on the circuit board 1, and the blocking part 32 is located at one end of the connecting rod 31 away from the circuit board 1. A guide part 33 is arranged at the connection between the connecting rod 31 and the blocking part 32. In one specific embodiment, the connecting part 3 is in T shape.

[0044] The blocking part 32 provides an effective limiting structure for the lead-out end of the coil 2, ensuring the stability of the electrical connection of the sensor; the blocking part 32 cooperates with the connecting rod 31 to form a structure similar to a hook, increasing the connecting friction between the coil 2 and the connecting part 3, further improving the reliability of the connection and the stability of the connection. When connecting the lead-out end of the coil 2 to the connecting part 3, the guide part 33 provides a smooth transition guide path for it, improving the assembly speed and the assembly yield of the product.

[0045] Further, the connecting part 3 is provided with a solder pad, and the lead-out end of the coil 2 is welded and fixed to the solder pad. The solder pad serves as a conductive area on the connecting part 3, providing a specially designed welding interface between the lead-out end of the coil 2 and the circuit board 1. Through the welding process, an atomic bond is formed between the lead-out end of the coil 2 and the solder pad, which ensures the high strength and stability of the connection.

[0046] Preferably, the connecting part 3 is integrally formed with the circuit board 1. The design of the connecting part 3 integrally formed with the circuit board 1 eliminates the connection gap or weak link that may exist in the traditional connection method, improving the environmental adaptability and long-term stability of the product.

[0047] Embodiment 1:

[0048] As shown in Figure 1 , the lead-out end of the coil 2 is wound and connected to the connecting part 3. The lead-out end of the coil 2 is wound around the connecting part 3 at least once.

[0049] In this embodiment, the coil 2 is pulled to the position of the connecting part 3 by a mechanical hand and wound around the connecting part 3 multiple times, and a welding gun is used to weld the coil 2 and the connecting part 3. The contact area between the coil 2 and the connecting part 3 is significantly increased, which can better maintain the stability of the connection, effectively prevent the coil 2 from being displaced or detached from the connecting part 3 due to vibration, and ensure the stability of the electrical connection of the sensor in harsh environments, thereby ensuring the continuity and accuracy of the measurement data.

[0050] The lead-out wire at one end of the coil 2 is wound around the connecting part 3 located on the outer side, which is the first winding position, and the lead-out wire at the other end of the coil 2 is wound around the connecting part 3 located on the inner side, which is the second winding position. In the case where the extension ends of the two connecting parts 3 are non-parallel and the protruding length of the connecting part 3 located on the outer side is greater than or equal to the protruding length of the connecting part 3 located on the inner side, the first winding position and the second winding position are staggered inside and outside to avoid interference when winding the coil.

[0051] Embodiment 2:

[0052] In this embodiment, the lead-out end of the coil 2 is directly connected to the connecting part 3, and the coil 2 and the connecting part 3 are welded and fixed.

[0053] The coil 2 is pulled to the position of the connecting part 3 by a mechanical hand and is kept, and a welding gun is used to weld the coil 2 and the connecting part 3. When the leading end of the coil 2 is directly connected to the connecting part 3, a complicated winding operation is not needed, which makes the assembling process more direct and simple, and improves the production efficiency.

[0054] The second aspect, as Figure 4 The utility model discloses an embodiment further discloses a fluxgate current sensor, including the circuit board 1 and the coil 2 disclosed in the first aspect, still include closed magnetic core 4 and shell 5, and the circuit board 1 and the coil 2 are located in the shell 5, and the coil 2 surrounds closed magnetic core 4 and sets up.

[0055] In the embodiment, the optimized design of the circuit board 1 and the coil 2 further ensures the stability of signal transmission between the coil 2 and the circuit board 1, and in combination with the magnetic field optimization of the closed magnetic core 4, the anti-interference capability of the whole sensor is greatly improved, and the stability and reliability of the system are improved.

[0056] The above describes the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

[0057] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. The word 'including' does not exclude the existence of elements or steps not listed in the claims. The word 'a' or 'one' in front of an element does not exclude the existence of multiple such elements. The simple fact that certain measures are recorded in mutually different dependent claims does not mean that the combination of these measures cannot be used for improvement. Any reference signs in the claims should not be interpreted as limiting the scope.

Claims

1. A coil assembly for a fluxgate current sensor, characterized by, The coil is connected with the circuit board through the connecting part to realize electrical connection.

2. The coil assembly for a fluxgate current sensor of claim 1, wherein, The leading end of the coil is wound around the connecting part.

3. The coil assembly for a fluxgate current sensor of claim 2, wherein, The leading end of the coil is wound around the connecting part at least once.

4. The coil assembly for a fluxgate current sensor of claim 1, wherein, The leading end of the coil is directly connected with the connecting part.

5. The coil assembly for a fluxgate current sensor of claim 1, wherein, The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided.

6. The coil assembly for a fluxgate current sensor of claim 1, wherein, The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided.

7. The coil assembly for a fluxgate current sensor of claim 1, wherein, The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided.

8. The coil assembly for a fluxgate current sensor of claim 7, wherein, The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided.

9. The coil assembly for a fluxgate current sensor of claim 1, wherein, The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided.

10. A fluxgate current sensor, characterized by The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and two connecting parts are provided. The connecting part is protruded from the edge of the circuit board, and

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