Mechanical direct-current circuit breaker with built-in Hall sensor

Abstract

The utility model relates to a mechanical direct-current circuit breaker with a built-in Hall sensor, a copper bar is arranged in the circuit breaker, the mechanical direct-current circuit breaker also comprises a Hall sensor assembly, the Hall sensor assembly is arranged in the circuit breaker, and the copper bar passes through the Hall sensor assembly; the Hall sensor assembly comprises a Hall sensor base, a Hall sensor upper cover, a Hall coil, a magnet, a Hall element, a circuit board, a Hall element lead and a Hall sensor output lead, one end of the Hall element lead penetrates through the Hall sensor base to be connected with the circuit board, and the other end of the Hall element lead is connected with the Hall element; the output wiring installation groove is located outside the circuit breaker shell, one end of the Hall sensor output lead penetrates through the Hall sensor base to be connected with the circuit board, and the other end of the Hall sensor output lead is connected with the output wiring installation groove. According to the utility model, through the structure that the Hall sensor assembly is assembled in the circuit breaker in a modularized manner, the protection capability of the circuit breaker to a circuit is comprehensively improved, and the installation and maintenance convenience of the circuit breaker is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, especially relates to a mechanical type direct current circuit breaker with built-in hall sensor. BACKGROUND

[0002] Hall sensors have high sensitivity, high reliability, low power consumption, miniaturization and other characteristics, and are widely used in industrial, automotive, consumer electronics and other fields. Hall sensors work based on the Hall effect. The Hall effect refers to the deflection force that a magnetic field exerts on the electric charges in a conductor when an electric current passes through the conductor located in the magnetic field, thereby generating a potential difference on both sides of the conductor, which is called Hall voltage. Hall sensors can sense changes in the magnetic field and convert them into electrical signals. When a magnetic field acts on a Hall sensor, the Hall element inside it will generate a Hall voltage, which is proportional to the magnetic field strength. By measuring the Hall voltage, the changes in the magnetic field can be indirectly known. Hall sensors are mainly divided into linear Hall sensors and switch-type Hall sensors. Linear Hall sensors can provide an output voltage proportional to the magnetic field strength, suitable for position, speed and current measurement; while switch-type Hall sensors output digital signals when the magnetic field strength reaches a preset threshold, commonly used to detect the presence or absence of a magnetic field.

[0003] As one of the most important components in high-voltage direct current systems, DC circuit breakers have strong breaking capacity, fast action speed, high reliability and other characteristics, and play an important role in high-voltage direct current transmission systems, renewable energy generation systems, urban power grids and distributed energy systems, electric vehicle charging stations and energy storage systems, as well as power electronic device protection in multiple fields and scenarios. Not only can it protect the safety of equipment and personnel, but also can improve the stability and reliability of the power system.

[0004] The application of Hall sensors and DC circuit breakers in power distribution systems is mainly as follows: when the current in the DC circuit changes, a corresponding magnetic field change will occur. Hall sensors can sense this magnetic field change and convert it into an electrical signal output. By measuring and analyzing this electrical signal, the current state in the DC circuit can be determined. When the current exceeds the preset value, the DC circuit breaker will act quickly to cut off the current in the circuit. As a key component in the electrical circuit, the Hall sensor mainly undertakes the monitoring task of current, voltage and other parameters. It is widely used in various electrical systems due to its unique physical characteristics, such as high precision, high stability and strong anti-interference ability. However, the nature of this externally attached accessory makes it somewhat inconvenient to install and maintain.

[0005] At present, the volume of the circuit breaker is smaller and smaller, and the structure is more and more compact, and the Hall sensor is mainly used as an external accessory, which is connected in series with the circuit breaker and installed in the electrical circuit, and this structure cannot directly control the actuator of the circuit breaker and cut off the circuit in time, thereby reducing the response speed of the circuit breaker. This not only increases the complexity of installation, but also puts forward higher requirements for maintenance work. In use, independent installation and maintenance are required, which is inconvenient. Content of the utility model

[0006] The utility model provides a mechanical type direct current circuit breaker with built-in Hall sensor, through the structure that the Hall sensor component is modularly assembled in the circuit breaker, under the premise that the size of the circuit breaker is not increased, the current measurement precision, fault detection capability and response speed of the circuit breaker to the circuit can be effectively improved, and the protection capability of the circuit breaker to the circuit is comprehensively improved.

[0007] The utility model provides a mechanical type direct current circuit breaker with built-in Hall sensor, the circuit breaker includes circuit breaker shell and circuit breaker base assembled with circuit breaker shell, be equipped with copper bar in the circuit breaker, it still includes Hall sensor component, the Hall sensor component is installed in the circuit breaker, copper passes through Hall sensor component, the Hall sensor component includes Hall sensor base, Hall sensor upper cover, Hall coil, magnet, Hall piece, circuit board, Hall lead, Hall sensor output lead, the Hall sensor base is equipped with annular groove and output wiring installation groove, the Hall sensor upper cover is installed on annular groove, the Hall coil is installed in annular groove, the magnet is installed in Hall coil, the Hall coil and magnet all are annular and do not close head and tail, the Hall piece is located between the head and tail of Hall coil, one end of Hall lead passes through Hall sensor base and is connected with circuit board, and the other end is connected with Hall piece, the output wiring installation groove is located outside circuit breaker shell, one end of Hall sensor output lead passes through Hall sensor base and is connected with circuit board, and the other end is connected with output wiring installation groove, the circuit breaker base is equipped with Hall sensor component installation groove, the Hall sensor base is installed in Hall sensor component installation groove.

[0008] Preferably, the circuit breaker base is provided with a Hall sensor component fixing hole, the Hall sensor base is provided with a base fixing hole, and the Hall sensor base is fixedly installed on the circuit breaker base by a bolt passing through the base fixing hole and the Hall sensor component fixing hole. The position and stability of the Hall sensor component in the circuit breaker are ensured.

[0009] Preferably, the Hall sensor base is provided with an upper cover snap-fit block and an upper cover outer ring stepped fitting part, the Hall sensor upper cover is provided with an upper cover snap and an upper cover inner ring stepped fitting part, the upper cover snap-fit block is matched and snapped with the upper cover snap, and the upper cover outer ring stepped fitting part is assembled with the upper cover inner ring stepped fitting part, so that the Hall sensor upper cover is fixedly installed on the Hall sensor base, the sealing property of the Hall sensor assembly is ensured, and the stable function of the Hall sensor assembly is ensured.

[0010] Preferably, the output wire installation slot is provided with an output wire snap installation hole, so that the installation and stability of the output wire installation slot are facilitated.

[0011] Preferably, the Hall sensor base is provided with a base inner hole, and the copper bar vertically penetrates through the base inner hole, so that the measurement efficiency is improved, and the measurement error is effectively avoided.

[0012] Preferably, the Hall sensor base is provided with a Hall lead installation hole, one end of the Hall lead penetrates through the Hall lead installation hole and is connected with the circuit board, and the other end is connected with the Hall sheet, so that the installation and stability of the Hall lead are facilitated.

[0013] Preferably, the circuit board and the Hall coil are both provided with an encapsulation layer.

[0014] The Hall sensor assembly has the following technical effects:

[0015] 1. The Hall sensor assembly is modularly assembled in the circuit breaker, the current measurement precision, fault detection capability and response speed of the circuit breaker on the circuit are effectively improved without increasing the size of the circuit breaker, the protection capability of the circuit breaker on the circuit is comprehensively improved, the convenience of installation and maintenance of the circuit breaker is improved, and the cost is reduced.

[0016] 2. The Hall sheet is communicated with the circuit board through the Hall lead, the circuit board is connected with the output wire installation slot through the Hall sensor output lead, and the output wire installation slot is located outside the circuit breaker shell, so that the Hall sensor assembly and the external circuit are communicated, and the output data of the Hall sensor assembly is quickly acquired. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an explosion structure schematic view of the Hall sensor assembly of the utility model;

[0018] Figure 2 It is a structure schematic view of the Hall sensor assembly of the utility model;

[0019] Figure 3 It is a top view structure schematic view of the Hall sensor assembly of the utility model;

[0020] Figure 4 It is a top view structure schematic view of the Hall sensor assembly of the utility model; Figure 3A-A sectional view of the shown Hall sensor assembly;

[0021] Figure 5 The utility model discloses a Hall sensor base structure schematic diagram;

[0022] Figure 6 The utility model discloses a circuit breaker structure schematic diagram;

[0023] Figure 7 The utility model discloses a Hall sensor assembly and circuit breaker base assembly drawing.

[0024] In the drawing: 1, circuit breaker shell;2, circuit breaker base;3, Hall sensor assembly;31, Hall sensor base;311, annular groove;312, output wiring installation groove;3121, output wiring buckle installation hole;313, base fixed hole;314, upper cover buckle cooperation piece;315, upper cover outer circle step cooperation part;316, Hall lead installation hole;32, Hall sensor upper cover;321, upper cover buckle;322, upper cover inner circle step cooperation part;33, Hall coil;34, magnet;35, Hall piece;36, circuit board;37, Hall lead;38, Hall sensor output lead;39, base inner hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will be specifically described to the utility model with the drawings.

[0026] As Figure 1 The utility model discloses a mechanical DC circuit breaker with built-in Hall sensor, the circuit breaker includes circuit breaker shell 1 and with circuit breaker shell 1 assembly's circuit breaker base 2, the circuit breaker is equipped with copper bar in, and it still includes Hall sensor assembly 3, the Hall sensor assembly 3 is installed in the circuit breaker, and the copper bar passes through Hall sensor assembly 3, as Figures 1 to 5 The utility model discloses a mechanical DC circuit breaker with built-in Hall sensor, the circuit breaker includes circuit breaker shell 1 and with circuit breaker shell 1 assembly's circuit breaker base 2, the circuit breaker is equipped with copper bar in, and it still includes Hall sensor assembly 3, the Hall sensor assembly 3 is installed in the circuit breaker, and the copper bar passes through Hall sensor assembly 3, as Figure 6As shown, the output wire mounting groove 312 is located outside the circuit breaker housing 1, one end of the Hall sensor output lead 38 is connected with the circuit board 36 through the Hall sensor base 31, and the other end is connected with the output wire mounting groove 312; as shown Figure 7 As shown, the circuit breaker base 2 is provided with a Hall sensor assembly mounting groove, and the Hall sensor base 31 is mounted in the Hall sensor assembly mounting groove. Through the structure of modularizing the Hall sensor assembly 3 in the circuit breaker, the current measurement accuracy, fault detection ability and response speed of the circuit breaker can be effectively improved without increasing the size of the circuit breaker, the protection ability of the circuit breaker to the circuit is comprehensively improved, the convenience of installation and maintenance of the circuit breaker is improved, and the cost is reduced. Through the structure that the Hall piece 35 is communicated with the circuit board 36 through the Hall lead 37, the circuit board 36 is connected with the output wire mounting groove 312 through the Hall sensor output lead 38, and the output wire mounting groove 312 is located outside the circuit breaker housing 1, the Hall sensor assembly 3 is convenient for being communicated with external lines, and output data of the Hall sensor assembly 3 can be quickly obtained.

[0027] When the circuit breaker is closed, the current flows through the copper bar, and a magnetic field is formed around the copper bar, the strength of the magnetic field is proportional to the size of the current. Since the Hall sensor assembly 3 is installed in the circuit breaker and is arranged near the copper bar, when the magnetic field acts on the Hall piece 35, a potential difference, i.e. a Hall voltage, is generated on both sides; the size of the Hall voltage is proportional to the strength of the current, so the current flowing through the copper bar can be indirectly measured by measuring the Hall voltage. By measuring the potential difference on both sides of the Hall piece 35 through the circuit board 36, and converting it into a voltage signal corresponding to the size of the current, and amplifying and processing it, the current value flowing through the copper bar can be obtained.

[0028] The Hall piece 35 is made of a semiconductor material, such as silicon (Si), germanium (Ge) or gallium arsenide (GaAs) and the like.

[0029] The Hall sensor base 31 and the Hall sensor upper cover 32 are made of BMC or other thermosetting composite materials to ensure the insulation and heat resistance of the overall structure.

[0030] The circuit breaker base 2 is provided with a Hall sensor assembly fixing hole, as shown Figure 5 As shown, the Hall sensor base 31 is provided with a base fixing hole 313, and the Hall sensor base 31 is fixedly installed on the circuit breaker base 2 by penetrating the base fixing hole 313 and the Hall sensor assembly fixing hole through a bolt. The position and stability of the Hall sensor assembly 3 in the circuit breaker are ensured.

[0031] As shown Figure 1 and Figure 5As shown, the Hall sensor base 31 is provided with an upper cover snap-fit block 314 and an upper cover outer ring stepped fitting part 315, the Hall sensor upper cover 32 is provided with an upper cover snap 321 and an upper cover inner ring stepped fitting part 322, the upper cover snap-fit block 314 and the upper cover snap 321 are matched and snapped, and the upper cover outer ring stepped fitting part 315 and the upper cover inner ring stepped fitting part 322 are assembled. The Hall sensor upper cover 32 is fixedly installed on the Hall sensor base 31. The airtightness of the Hall sensor assembly 3 is ensured, so that the function stability of the Hall sensor assembly 3 is ensured.

[0032] As shown in the drawings, the Hall sensor assembly 3 comprises a Hall sensor base 31, a Hall sensor upper cover 32, a Hall coil 33, a Hall lead 37, a Hall piece 35, a circuit board 36 and a Hall sensor output wire 34. Figure 2 As shown, the output wire mounting groove 312 is provided with an output wire snap mounting hole 3121. The installation and stability of the output wire mounting groove 312 are facilitated.

[0033] The Hall sensor base 31 is provided with a base inner hole 39, and the copper bar vertically passes through the base inner hole 39. The measurement efficiency is improved, and the measurement error is effectively avoided.

[0034] The Hall sensor base 31 is provided with a Hall lead mounting hole 316, one end of the Hall lead 37 is connected with the circuit board 36 through the Hall lead mounting hole 316, and the other end is connected with the Hall piece 35. The installation and stability of the Hall lead 37 are facilitated.

[0035] The circuit board 36 and the Hall coil 33 are each provided with an encapsulation layer. The stability and safety of the Hall sensor assembly 3 are ensured.

[0036] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A mechanical DC circuit breaker with built-in Hall sensor, the circuit breaker comprising a circuit breaker housing and a circuit breaker base assembled with the circuit breaker housing, a copper bar is arranged in the circuit breaker, characterized in that, It also includes a Hall sensor assembly mounted in the circuit breaker, and the copper bar passes through the Hall sensor assembly; the Hall sensor assembly includes a Hall sensor base, a Hall sensor upper cover, a Hall coil, a magnet, a Hall piece, a circuit board, a Hall lead, and a Hall sensor output lead, the Hall sensor base is provided with an annular groove and an output wire mounting groove, the Hall sensor upper cover is mounted on the annular groove, the Hall coil is mounted in the annular groove, the magnet is mounted in the Hall coil, the Hall coil and the magnet are both in a ring shape with the head and tail not closed, the Hall piece is located between the head and tail of the Hall coil, one end of the Hall lead is connected with the circuit board through the Hall sensor base, and the other end is connected with the Hall piece; the output wire mounting groove is located outside the circuit breaker shell, one end of the Hall sensor output lead is connected with the circuit board through the Hall sensor base, and the other end is connected with the output wire mounting groove; the circuit breaker base is provided with a Hall sensor assembly mounting groove, and the Hall sensor base is mounted in the Hall sensor assembly mounting groove.

2. The mechanical DC circuit breaker with a built-in Hall sensor according to claim 1, characterized in that: The circuit breaker base is provided with a Hall sensor assembly fixing hole, the Hall sensor base is provided with a base fixing hole, and the Hall sensor base is fixedly mounted on the circuit breaker base by a bolt passing through the base fixing hole and the Hall sensor assembly fixing hole. 3.The mechanical DC circuit breaker with a built-in Hall sensor according to claim 1, wherein: The Hall sensor base is provided with an upper cover buckle matching block and an upper cover outer ring stepped matching part, the Hall sensor upper cover is provided with an upper cover buckle and an upper cover inner ring stepped matching part, the upper cover buckle matching block is matched and buckled with the upper cover buckle, and the upper cover outer ring stepped matching part is assembled with the upper cover inner ring stepped matching part.

4. The mechanical DC circuit breaker with a built-in Hall sensor according to claim 1, characterized in that: The output wire mounting groove is provided with an output wire buckle mounting hole.

5. The mechanical DC circuit breaker with a built-in Hall sensor according to claim 1, characterized in that: The Hall sensor base is provided with a base inner hole, and the copper bar vertically passes through the base inner hole.

6. The mechanical DC circuit breaker with a built-in Hall sensor according to claim 1, characterized in that: The Hall sensor base is provided with a Hall lead mounting hole, one end of the Hall lead is connected with the circuit board through the Hall lead mounting hole, and the other end is connected with the Hall piece.

7. The mechanical DC circuit breaker with a built-in Hall sensor according to claim 1, characterized in that: The circuit board and the Hall coil are both provided with an encapsulation layer.

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