A protection box based on hall current sensor

Abstract

This invention provides a protective box based on a Hall current sensor, relating to the field of Hall current sensors. The protective box assembly includes a housing, a cover plate, a back plate, and heat dissipation fins. The cover plate is located on the front of the housing, the back plate is fixed to the back of the housing, and the heat dissipation fins are fixed to both sides of the housing. A magnetic core, a Hall element, an integrated circuit, and a compensation coil are installed inside the housing. This invention provides protection for the components by using a housing and cover plate. Unlike resin encapsulation, this physical structure protection prevents aging and cracking due to environmental changes. The housing and cover plate provide stable physical protection for the internal magnetic core, Hall element, integrated circuit, and compensation coil. The heat dissipation fins on both sides of the housing help dissipate heat generated by the components inside the protective box, reducing the risk of damage to the protective structure and sensor components due to excessive temperature.

Description

Technical Field

[0001] This utility model belongs to the field of Hall current sensors, specifically a protection box based on a Hall current sensor. Background Technology

[0002] A Hall current sensor is a detection circuit device based on the Hall effect. The main working principle of the current sensor is based on the Hall effect principle. The Hall effect is a magnetic sensitivity effect. When current passes through a conductor material located in a magnetic field, the magnetic field will exert a force on the electrons in the conductor perpendicular to the direction of electron motion, thereby generating a potential difference in two directions perpendicular to the conductor and the magnetic field lines. Hall current sensors are non-contact measurement devices with excellent electrical isolation, simple structure, small size, high sensitivity, high accuracy, good linearity, wide bandwidth, fast response and strong overload capacity.

[0003] Hall current sensors are mainly composed of a magnetic core, Hall elements, and integrated circuits. These components are usually installed in a housing to protect them from interference or damage caused by the external environment. Current protective housings typically use resin encapsulation or screw fixing. While resin encapsulation provides some protection, it can lead to aging and cracking due to environmental changes during long-term use, affecting the stability and lifespan of the sensor. Screw fixing, although structurally more stable, is cumbersome to install and remove, thus causing inconvenience in the use of Hall current sensors.

[0004] In summary, this utility model provides a protection box based on a Hall current sensor to solve the above problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A protection box based on a Hall current sensor includes a protection box assembly. The protection box assembly includes a housing, a cover plate, a back plate, and heat dissipation fins. The cover plate is located on the front of the housing, the back plate is fixed to the back of the housing, and the heat dissipation fins are fixed to both sides of the housing. A magnetic core, a Hall element, an integrated circuit, and a compensation coil are installed in the inner cavity of the housing. The housing and the cover plate are used to provide protection for the components. A connecting assembly is installed on the surface of the protection box assembly. The connecting assembly includes a locking plate, a locking groove, a protrusion, a through groove, a socket, and a plug. The connecting assembly is used to fix the housing and the cover plate. The plug is inserted into the socket, the protrusion is engaged with the through groove, and the locking groove is engaged with the locking plate.

[0007] Furthermore, in this utility model, the magnetic core is inserted into the inner cavity of the housing, the Hall element is located in the air gap of the magnetic core, the integrated circuit is fixedly connected to the inner wall of the housing, and mounting holes are provided on both sides of the lower end of the cover plate.

[0008] Furthermore, in this invention, the Hall element is electrically connected to the integrated circuit, a terminal block is fixedly connected to the surface of the back plate, the integrated circuit is electrically connected to the terminal block, and the compensation coil is wound around the surface of the magnetic core.

[0009] Furthermore, in this invention, the integrated circuit includes an amplifier circuit, a temperature compensation circuit, and a filter circuit, all of which are integrated on a PCB board.

[0010] Furthermore, in this utility model, slots are provided at the top and bottom of the shell surface, and the protrusion is fixed in the inner cavity of the slot.

[0011] Furthermore, in this utility model, a retaining plate is fixedly connected to both the upper and lower ends of the cover plate surface, the through groove is opened on the surface of the retaining plate, the retaining plate extends into the inner cavity of the retaining groove, and the protrusion penetrates into the inner cavity of the through groove.

[0012] Furthermore, in this utility model, the insertion holes are opened on both sides of the inner cavity of the housing, one end of the insertion rod is fixedly connected to the cover plate, and the other end of the insertion rod extends into the inner cavity of the insertion hole.

[0013] Beneficial effects: This utility model has the following beneficial effects:

[0014] This invention provides protection for the components by using a housing and cover plate. Unlike resin encapsulation, this physical structural protection prevents aging and cracking caused by environmental changes. The housing and cover plate provide stable physical protection for the internal magnetic core, Hall element, integrated circuit, and compensation coil, avoiding direct impact of external factors on the sensor components, thereby ensuring the stability and lifespan of the sensor. The heat dissipation fins on both sides of the housing help dissipate the heat generated by the components inside the protective box, reducing the risk of damage to the protective structure and sensor components due to excessive temperature.

[0015] By connecting the insert rod to the socket, engaging the protrusion with the through slot, and engaging the slot with the plate, the housing and cover are fixed. Compared with screw fixing, the operation is simpler and faster, greatly reducing the time and workload in the installation and disassembly process. It effectively solves the problem of cumbersome installation and disassembly of screw fixing, and provides convenience for the use of Hall current sensors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the shell and the magnetic core of this utility model;

[0019] Figure 4 This is a schematic diagram of the separated state of the shell and cover plate of this utility model;

[0020] Figure 5 This is a schematic diagram of the system flow of this utility model.

[0021] In the picture:

[0022] 1. Protective box assembly; 11. Housing; 12. Cover plate; 13. Back plate; 14. Heat sink fins; 15. Mounting holes; 2. Connecting assembly; 21. Card plate; 22. Card slot; 23. Protrusion; 24. Through slot; 25. Socket; 26. Insert rod; 3. Magnetic core; 4. Hall element; 5. Integrated circuit; 51. Amplifier circuit; 52. Temperature compensation circuit; 53. Filter circuit; 6. Compensation coil; 7. Terminal block. Detailed Implementation

[0023] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0024] Example 1

[0025] like Figure 1-5As shown, this is the first embodiment of the present invention. This embodiment provides a protection box based on a Hall current sensor, including a protection box assembly 1. The protection box assembly 1 includes a housing 11, a cover plate 12, a back plate 13, and heat dissipation fins 14. The cover plate 12 is located on the front of the housing 11, the back plate 13 is fixed to the back of the housing 11, and the heat dissipation fins 14 are fixed to both sides of the housing 11. A magnetic core 3, a Hall element 4, an integrated circuit 5, and a compensation coil 6 are installed in the inner cavity of the housing 11. The housing 11 and the cover plate 12 are used to provide protection for the components. A connecting assembly 2 is installed on the surface of the protection box assembly 1. The connecting assembly 2 includes a locking plate 21, a locking groove 22, a protrusion 23, a through groove 24, a socket 25, and a plug 26. The connecting assembly 2 is used to fix the housing 11 and the cover plate 12. The plug 26 is inserted into the socket 25, the protrusion 23 is engaged with the through groove 24, and the locking groove 22 is engaged with the locking plate 21.

[0026] like Figure 1-5 As shown, the housing 11, cover plate 12, back plate 13, and heat dissipation fins 14 provide effective protection and heat dissipation. The connection between the housing 11 and the cover plate 12 is sealed with conductive silicone, and the inner walls of the housing 11 and the cover plate 12 are also coated with thermally conductive silicone to improve heat dissipation. The housing 11, cover plate 12, back plate 13, and heat dissipation fins 14 can all be made of aluminum oxide. Through the wedge-shaped engagement of the upper and lower double clamping plates 21 and the clamping slots 22, and the positioning of the side insertion rods 26 and the insertion holes 25, quick assembly and disassembly can be achieved. Through the engagement of the protrusions 23 and the through slots 24, the housing 11 and the cover plate 12 can be fixed, thereby ensuring the sealing and stability of the connection. The quick assembly and disassembly of the connecting components 2 make installation and maintenance more convenient.

[0027] Example 2

[0028] Reference Figure 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0029] In this embodiment, the magnetic core 3 is inserted into the inner cavity of the housing 11, the Hall element 4 is located in the air gap of the magnetic core 3, the integrated circuit 5 is fixedly connected to the inner wall of the housing 11, and mounting holes 15 are provided on both sides of the lower end of the cover plate 12.

[0030] Hall element 4 is electrically connected to integrated circuit 5. Terminal 7 is fixedly connected to the surface of back plate 13. Integrated circuit 5 is electrically connected to terminal 7. Compensation coil 6 is wound around the surface of magnetic core 3.

[0031] Integrated circuit 5 includes an amplifier circuit 51, a temperature compensation circuit 52, and a filter circuit 53, all of which are integrated on a PCB board.

[0032] The top and bottom of the surface of the housing 11 are provided with slots 22, and the protrusions 23 are fixed in the inner cavity of the slots 22.

[0033] A retaining plate 21 is fixedly connected to both the upper and lower ends of the surface of the cover plate 12. A through groove 24 is opened on the surface of the retaining plate 21. The retaining plate 21 extends into the inner cavity of the groove 22, and the protrusion 23 penetrates into the inner cavity of the through groove 24.

[0034] The insertion holes 25 are opened on both sides of the inner cavity of the housing 11. One end of the insertion rod 26 is fixedly connected to the cover plate 12, and the other end of the insertion rod 26 extends into the inner cavity of the insertion hole 25.

[0035] like Figure 1-5 As shown, when current passes through the magnetic core 3, a magnetic field is generated. The Hall element 4 is located at the air gap of the magnetic core 3 and can detect changes in the magnetic field and convert them into electrical signals. This signal is processed by the amplification circuit 51, temperature compensation circuit 52 and filter circuit 53 in the integrated circuit 5 and then output through the terminal 7. The compensation coil 6 is used to enhance or adjust the magnetic field and improve the accuracy of the measurement. The Hall element 4 is an InSb Hall chip with a sensitivity of KH = 25mV / mA ​​and a temperature coefficient α < 0.02% / ℃. The compensation coil 6 adopts a double-wire parallel winding process with a turns ratio of N1:N2 = 100:1 to achieve a magnetic field compensation accuracy of 0.1%. The magnetic core 3 adopts a nanocrystalline alloy core with a permeability μ > 80,000. With an optimized air gap of 0.5mm, the linear range is extended to ±1500A.

[0036] During use, the housing 11 and the cover plate 12 are radially positioned by the insertion rod 26 and the insertion hole 25. The protrusion 23 and through groove 24 of the locking plate 21 and the slot 22 provide circumferential locking, realizing a stable connection between the housing 11 and the cover plate 12, ensuring the sealing of the equipment, and providing protection for the components. The physical structure protection is different from resin encapsulation, so there will be no aging or cracking due to environmental changes. The housing 11 and the cover plate 12 can provide stable physical protection for the internal magnetic core 3, Hall element 4, integrated circuit 5 and compensation coil 6, avoiding the direct impact of external factors on the sensor components. The heat dissipation fins 14 on both sides of the housing 11 help to dissipate the heat generated by the components inside the protective box, reducing the risk of damage to the protective structure and sensor components due to excessive temperature. The quick disassembly and assembly of the connecting component 2 makes installation and maintenance more convenient.

[0037] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0038] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A protection box based on a Hall current sensor, comprising a protection box assembly (1), characterized in that: The protective box assembly (1) includes a housing (11), a cover plate (12), a back plate (13), and heat dissipation fins (14). The cover plate (12) is located on the front of the housing (11), the back plate (13) is fixed to the back of the housing (11), and the heat dissipation fins (14) are fixed to both sides of the housing (11). A magnetic core (3), a Hall element (4), an integrated circuit (5), and a compensation coil (6) are installed in the inner cavity of the housing (11). The housing (11) and the cover plate (12) are connected by... To provide protection for the components, a connecting assembly (2) is mounted on the surface of the protective box assembly (1). The connecting assembly (2) includes a retaining plate (21), a retaining groove (22), a protrusion (23), a through groove (24), a socket (25), and a plug (26). The connecting assembly (2) is used to fix the housing (11) and the cover plate (12). The plug (26) is inserted into the socket (25), the protrusion (23) is engaged with the through groove (24), and the retaining groove (22) is engaged with the retaining plate (21).

2. The protection box based on a Hall current sensor as described in claim 1, characterized in that: The magnetic core (3) is inserted into the inner cavity of the housing (11), the Hall element (4) is located in the air gap of the magnetic core (3), the integrated circuit (5) is fixedly connected to the inner wall of the housing (11), and mounting holes (15) are provided on both sides of the lower end of the cover plate (12).

3. The protection box based on a Hall current sensor as described in claim 1, characterized in that: The Hall element (4) is electrically connected to the integrated circuit (5), and the back plate (13) is fixedly connected to the terminal (7). The integrated circuit (5) is electrically connected to the terminal (7), and the compensation coil (6) is wound around the surface of the magnetic core (3).

4. The protection box based on a Hall current sensor as described in claim 1, characterized in that: The integrated circuit (5) includes an amplifier circuit (51), a temperature compensation circuit (52), and a filter circuit (53), all of which are integrated on a PCB board.

5. The protection box based on a Hall current sensor as described in claim 1, characterized in that: The top and bottom of the surface of the housing (11) are provided with slots (22), and the protrusion (23) is fixed in the inner cavity of the slot (22).

6. The protection box based on a Hall current sensor as described in claim 1, characterized in that: The upper and lower ends of the cover plate (12) are fixedly connected with a card plate (21), the through groove (24) is opened on the surface of the card plate (21), the card plate (21) extends into the inner cavity of the slot (22), and the protrusion (23) penetrates into the inner cavity of the through groove (24).

7. The protection box based on a Hall current sensor as described in claim 1, characterized in that: The insertion holes (25) are located on both sides of the inner cavity of the housing (11). One end of the insertion rod (26) is fixedly connected to the cover plate (12), and the other end of the insertion rod (26) extends into the inner cavity of the insertion hole (25).

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