Power supply system and switching unit

Abstract

This application provides a power supply system and a switching unit. The power supply system includes a switch, which includes a switching unit and an operating mechanism. The switching unit includes an arc-extinguishing component, a stationary contact assembly, a moving contact, and a first magnet assembly. The arc-extinguishing component is located inside the arc-extinguishing component. The moving contact is located inside the arc-extinguishing component and can move relative to the stationary contact assembly. When the operating mechanism receives a tripping signal, it controls the switching unit to disconnect, so that the moving contact separates from the stationary contact assembly. During the separation of the moving contact and the stationary contact assembly, an electric arc is formed between them. At least a portion of the magnetic field lines of the first magnet assembly intersect with the current direction of the electric arc to drive the electric arc to move toward the arc-extinguishing component. The first magnet assembly includes a first magnet and a second magnet arranged at intervals. The first magnet and the second magnet are used together to increase the movement path of the electric arc and increase the contact area between the electric arc and the arc-extinguishing component, thereby improving the cooling effect of the arc-extinguishing component on the electric arc.

Description

Technical Field

[0001] This application relates to the field of switch technology, and in particular to a power supply system and a switch unit. Background Technology

[0002] A switch is an electronic component used to connect or disconnect current in one or more circuits. In power systems, switches typically play a control and protection role. During the process of interrupting current, an electric arc is generated. The generation of an electric arc prolongs the circuit breaking time, and the high temperature of the arc can easily cause the switch to deform or melt, endangering the safe operation of the power supply system and causing significant personal injury and property damage. During use, switches require cooling of the electric arc to reduce its harmful effects. However, current technologies are inadequate in cooling the arc, especially at higher temperatures. Summary of the Invention

[0003] This application provides a power supply system with switches having good disconnection capability.

[0004] In a first aspect, this application discloses a power supply system, comprising a control unit, a switch, a DC source, and a power conversion unit. The switch is electrically connected between the DC source and the power conversion unit. The control unit is configured to send a tripping signal to the switch when the DC source or the power conversion unit fails. The switch includes a switching unit and an operating mechanism. The operating mechanism is configured to receive the tripping signal and control the switching unit to open or close. The switching unit includes an arc-extinguishing component, a stationary contact assembly, a moving contact, and a first magnet assembly. The stationary contact assembly is located inside the arc-extinguishing component. The moving contact is located inside the arc-extinguishing component and is capable of operating relative to the stationary contact assembly. When the operating mechanism receives the tripping signal, it controls the switching unit to disconnect, causing the moving contact to separate from the stationary contact assembly. During the separation of the moving contact and the stationary contact assembly, an electric arc is formed between them. At least a portion of the magnetic field lines of the first magnet assembly intersect with the current direction of the electric arc, driving the electric arc toward the arc-extinguishing functional component. The first magnet assembly includes a first magnet and a second magnet spaced apart. The first magnet and the second magnet work together to increase the movement path of the electric arc and increase the contact area between the electric arc and the arc-extinguishing functional component, thereby improving the cooling effect of the arc-extinguishing functional component on the electric arc.

[0005] Through the combined action of the first and second magnets in the first magnet assembly, on the one hand, the arc is simultaneously subjected to the magnetic forces of the first and second magnets. The arc is stretched by the magnetic forces of the two magnets, resulting in a greater degree of bending and elongation of the arc, which is more conducive to the cooling of the arc. On the other hand, the ends of the arc near the stationary contact assembly and the moving contact are the hottest parts of the arc. Because two magnets, namely the first and second magnets, are used, the areas with the highest magnetic field density in the first and second magnets are respectively distributed on the side near the stationary contact assembly and the side near the moving contact. This places the ends of the arc near the stationary contact assembly and the moving contact in a position with a strong magnetic field. The arc experiences a strong magnetic force and a longer movement path in the hottest parts, which is more conducive to improving the cooling efficiency of the arc. Furthermore, the arc is moved to the arc-extinguishing functional component by the action of the magnetic force. The arc-extinguishing functional component performs secondary cooling on the arc, maximizing the breaking capacity of the switch. Moreover, the arc-extinguishing functional component has a simple structure and low cost.

[0006] In one possible implementation, the stationary contact assembly includes a first stationary contact and a second stationary contact spaced apart, and the moving contact includes a first end and a second end disposed opposite to each other. The operating mechanism can control the rotation of the moving contact. When the switch unit is in the closed state, the first end and the second end are respectively connected to the first stationary contact and the second stationary contact to conduct current. When the switch unit is in the open state, the moving contact rotates to separate the first end from the first stationary contact and the second end from the second stationary contact to cut off the current, and a first electric arc is formed between the first end and the first stationary contact. The first magnet and the second magnet are located on one side of the first electric arc, and the first magnet and the second magnet are used together to increase the movement path of the first electric arc and increase the contact area between the first electric arc and the arc-extinguishing functional component.

[0007] By setting the first stationary contact and the second stationary contact, as well as the first end and the second end of the moving contact, the connection performance of the switching unit is improved, and the breaking capacity of the switching unit is enhanced.

[0008] In one embodiment, the stationary contact assembly is fixed relative to the arc-extinguishing functional component, and the moving contact is rotatable relative to the stationary contact assembly and the arc-extinguishing functional component. The operating mechanism controls the moving contact to rotate counterclockwise, causing the moving contact to separate from the stationary contact assembly, thereby changing the switch from a closed state to an open state.

[0009] In one embodiment, the arc-extinguishing functional component is an integrated structure, and the integrated structure of the first sub-functional component and the second sub-functional component has high strength.

[0010] In one embodiment, the arc-extinguishing functional component and the moving contact are an integrated structure.

[0011] In one embodiment, the first sub-functional component and the moving contact are an integrated structure, and the second sub-functional component is an integrated structure. The first sub-functional component and the second sub-functional component are connected to form the arc extinguishing functional component by welding, bonding or other means.

[0012] In one possible implementation, the arc-extinguishing component includes at least one of an insulating housing or a metal grid assembly. The insulating housing is made of insulating material and is capable of effectively cooling the electric arc. The metal grid assembly includes an insulating plate and metal sheets located within the insulating plate. The metal sheets in the metal grid assembly are not connected to the moving contact and are insulated from the moving contact; the metal sheets enhance the cooling effect on the electric arc.

[0013] In one possible implementation, the first magnet and the second magnet are arranged in the same direction to drive the first electric arc to move towards the same side of the arc-extinguishing component, thereby increasing the movement path of the first electric arc and the contact area between the first electric arc and the arc-extinguishing component. Specifically, the first magnet and the second magnet are arranged in the same direction to drive the first electric arc to move towards the same side of the arc-extinguishing component, thereby increasing the movement path of the first electric arc and the contact area between the first electric arc and the arc-extinguishing component. The first magnet and the second magnet being arranged in the same direction means that the north and south poles of the first magnet and the second magnet are aligned in the same direction.

[0014] In one embodiment, the south poles of the first magnet and the second magnet are both located close to the first electric arc and the north poles are located away from the first electric arc. The arrangement direction of the south and north poles is coplanar with the surface of the first sub-functional component or the second sub-functional component, or the arrangement direction of the south and north poles is the same as the radial direction of the first sub-functional component or the second sub-functional component.

[0015] In one embodiment, the second magnet is located on one side of the first magnet along a third direction. The south poles of both the first and second magnets are located close to the first electric arc, while the north poles are located away from the first electric arc. The first and second magnets jointly drive the first electric arc to move toward the first sub-functional component. The first electric arc is simultaneously subjected to the magnetic forces of the first and second magnets, which makes the first electric arc more elongated and more conducive to the cooling of the first electric arc.

[0016] In one embodiment, the north poles of both the first magnet and the second magnet are positioned close to the first electric arc, while the south poles are positioned far from the first electric arc. The second magnet is located on one side of the first magnet along a third direction. The north poles of both the first magnet and the second magnet are positioned close to the first electric arc, while the south poles are positioned far from the first electric arc. The first magnet and the second magnet jointly drive the first electric arc to move toward the second sub-functional component. The first electric arc is simultaneously subjected to the magnetic forces of the first magnet and the second magnet, which causes the first electric arc to be stretched to a greater extent, which is more conducive to the cooling of the electric arc.

[0017] In one possible implementation, the first magnet assembly further includes a third magnet, wherein the first magnet, the second magnet, and the third magnet are all arranged in the same direction to drive the first electric arc to move toward the same side of the arc-extinguishing functional element, thereby increasing the movement path of the first electric arc and increasing the contact area between the first electric arc and the arc-extinguishing functional element.

[0018] In one embodiment, the first magnet, the second magnet, and the third magnet are arranged sequentially along a third direction. The north poles of the first magnet, the second magnet, and the third magnet are all positioned close to the first electric arc, while the south poles are positioned far away from the first electric arc. The first magnet, the second magnet, and the third magnet jointly drive the first electric arc to move towards the second sub-functional component. The first electric arc is simultaneously subjected to the magnetic forces of the three magnets, resulting in a greater degree of elongation of the first electric arc, which is more conducive to the cooling of the arc. Furthermore, the higher-temperature ends of the first electric arc are stretched to a greater extent, which further improves the cooling efficiency of the first electric arc.

[0019] In one embodiment, the first magnet, the second magnet, and the third magnet are arranged sequentially along a third direction. The south poles of the first magnet, the second magnet, and the third magnet are all positioned close to the first electric arc, while the north poles are positioned away from the first electric arc. The first magnet, the second magnet, and the third magnet jointly drive the first electric arc to move towards the first sub-functional component. The first electric arc is simultaneously subjected to the magnetic forces of the three magnets, resulting in a greater degree of elongation of the first electric arc, which is more conducive to the cooling of the arc. Furthermore, the higher-temperature ends of the first electric arc are stretched to a greater extent, which further improves the cooling efficiency of the first electric arc.

[0020] In one possible implementation, the arc-extinguishing functional component includes a first sub-functional component and a second sub-functional component arranged opposite to each other. The first magnet and the second magnet are arranged in opposite directions. The first magnet is used to drive a portion of the first arc to move toward the first sub-functional component, and the second magnet is used to drive a portion of the first arc to move toward the second sub-functional component, thereby increasing the movement path of the first arc. The first magnet is used to increase the contact area between the first arc and the first sub-functional component, and the second magnet is used to increase the contact area between the first arc and the second sub-functional component, so that both the first sub-functional component and the second sub-functional component are used to cool the first arc.

[0021] The reverse arrangement of the first and second magnets means that the north and south poles of the first and second magnets are reversed. That is, the south pole of the first magnet is placed closer to the first electric arc and the north pole is placed farther away from the first electric arc, and the north pole of the second magnet is placed closer to the first electric arc and the south pole is placed farther away from the first electric arc. By setting the first and second magnets in a reverse arrangement, the shape of the first electric arc is roughly "S". On the one hand, it lengthens the first electric arc, which is conducive to the rapid cooling of the first electric arc. On the other hand, it makes full use of the first and second sub-functional components to cool the first electric arc, increases the area of ​​the arc-extinguishing functional components that can be used to cool the first electric arc, and improves the cooling effect and efficiency of the first electric arc.

[0022] In one embodiment, the first magnet and the second magnet are arranged in opposite directions, with the north pole of the first magnet positioned close to the first electric arc and the south pole positioned away from the first electric arc, so as to drive a portion of the first electric arc to move toward the second sub-functional component; the south pole of the second magnet is positioned close to the first electric arc and the north pole is positioned away from the first electric arc, so as to drive a portion of the first electric arc to move toward the first sub-functional component.

[0023] In one possible implementation, the first magnet assembly further includes a third magnet, with the first magnet, the second magnet, and the third magnet arranged sequentially, the third magnet being arranged in the opposite direction to the second magnet, the third magnet being used to drive a portion of the first arc toward the first sub-functional component to increase the movement path of the first arc, and the third magnet being used to increase the contact area between the first arc and the first sub-functional component to improve the cooling effect of the first sub-functional component on the first arc.

[0024] By arranging the first, second, and third magnets, the shape of the first electric arc is roughly "W" or wavy. On the one hand, the first electric arc is lengthened by the magnetic forces of the three magnets simultaneously, which is more conducive to the rapid cooling of the first electric arc. On the other hand, by making full use of the first and second sub-functional components to cool the first electric arc, the area of ​​the arc-extinguishing functional components that can be used to cool the first electric arc is increased, thereby improving the cooling effect and efficiency of the first electric arc. Furthermore, the first electric arc is stretched to a greater extent at the two ends with higher temperatures by the magnetic forces of the three magnets simultaneously, which is more conducive to improving the cooling efficiency of the first electric arc.

[0025] In one possible implementation, the first magnet assembly further includes a third magnet, the first magnet, the second magnet and the third magnet are arranged sequentially, the second magnet and the third magnet are arranged in the same direction, the third magnet is used to drive a portion of the first arc to move toward the second sub-functional component to increase the movement path of the first arc, and the third magnet is used to increase the contact area between the first arc and the second sub-functional component to improve the cooling effect of the second sub-functional component on the first arc.

[0026] In this configuration, the third magnet is arranged in the same direction as the second magnet and in the opposite direction to the first magnet. Specifically, the south pole of the first magnet is positioned closer to the first arc, and the north pole is positioned further away from the first arc. Similarly, the north poles of the second and third magnets are positioned closer to the first arc, and the south poles are positioned further away from the first arc. This arrangement of the first, second, and third magnets makes the first arc roughly "S"-shaped. Firstly, the simultaneous magnetic forces of the three magnets lengthen the first arc, facilitating rapid cooling. Secondly, fully utilizing the first and second sub-functional components for cooling increases the area of ​​the arc-extinguishing components available for cooling the first arc, improving its cooling effect and efficiency. Thirdly, the simultaneous magnetic forces of the three magnets cause the first arc to be stretched further at its higher-temperature ends, further enhancing its cooling efficiency.

[0027] In one possible implementation, the first magnet assembly further includes a third magnet located between the first magnet and the second magnet, the third magnet being arranged in the same direction as the first magnet, the third magnet being used to drive a portion of the first arc toward the first sub-functional component to increase the movement path of the first arc, and the third magnet being used to increase the contact area between the first arc and the first sub-functional component to improve the cooling effect of the first sub-functional component on the first arc.

[0028] By setting up the first magnet, the third magnet, and the second magnet, the shape of the first electric arc is roughly "S". On the one hand, the first electric arc is lengthened by the magnetic force of the three magnets, which is more conducive to the rapid cooling of the first electric arc. On the other hand, by making full use of the first and second sub-functional components to cool the first electric arc, the area of ​​the arc-extinguishing functional components that can be used to cool the first electric arc is increased, thereby improving the cooling effect and efficiency of the first electric arc. Furthermore, the first electric arc is stretched to a greater extent at the two ends with higher temperatures by the magnetic force of the three magnets, which is more conducive to improving the cooling efficiency of the first electric arc.

[0029] In one possible implementation, the extension direction of the first magnet intersects the extension direction of the second magnet, thereby increasing the driving force of the first magnet assembly on the first electric arc and reducing the volume of the switch. The first and second magnets are positioned close to the arc-extinguishing functional component and the first electric arc. In this embodiment, the arc-extinguishing functional component is circular, and the surfaces of the first and second magnets near the arc-extinguishing functional component are perpendicular to its radial direction. On one hand, the close proximity of the magnet assembly to the first electric arc increases the magnetic force on the first electric arc, allowing the magnet assembly to better drive the first electric arc's movement and facilitating its cooling. On the other hand, the close proximity of the magnet assembly reduces the volume of the switching unit, thereby reducing the overall size of the switch.

[0030] In one embodiment, the extending direction of the first magnet is parallel to the extending direction of the second magnet, and the first magnet and the second magnet are on the same straight line.

[0031] In one possible implementation, the extension direction of the first magnet is the same as that of the second magnet, and the magnetic field lines inside the first magnet and the second magnet intersect, so that the first arc is close to the arc-extinguishing component. The magnetic field lines inside the first magnet point from the south pole to the north pole, and the magnetic field lines inside the second magnet point from the south pole to the north pole. In practical scenarios, the first arc may be curved, and the arc-extinguishing component may be an uneven shell. The magnetic field lines inside the first magnet and the second magnet differ by a preset angle. By adjusting the direction of the magnetic field, the movement direction of the first arc is controlled, so that the first arc moves to the arc-extinguishing component more quickly, facilitating the cooling of the first arc.

[0032] In one embodiment, the direction of the magnetic field lines inside the first magnet is parallel to the direction of the magnetic field lines inside the second magnet.

[0033] In one embodiment, the thickness of the first magnet assembly in the first direction is greater than the thickness of the arc-extinguishing functional component in the first direction. This allows the first electric arc to be better subjected to magnetic force and move, thereby improving the cooling rate of the first electric arc.

[0034] In one possible implementation, the first magnet assembly includes four or more magnets, including both the first magnet and the second magnet. The four or more magnets are arranged sequentially, with the directions of their magnetic field lines differing by a preset angle to enhance the cooling effect on the first electric arc. By adjusting the number of magnets, the direction of their magnetic field lines, or the preset angle difference between the magnetic field directions of adjacent magnets, the shape of the first electric arc is controlled to approximate a square wave shape. This allows the first electric arc to adapt to the shape of the arc-extinguishing functional component and move more quickly to the first and second sub-functional components, further improving the cooling effect on the first electric arc.

[0035] In one possible implementation, the switching unit further includes a second magnet assembly, wherein when the switching unit is in the open state, a second electric arc is formed between the second end and the second stationary contact; the first magnet and the second magnet are located on the side of the first electric arc away from the second electric arc, and at least a portion of the magnetic field lines of the second magnet assembly intersect the current direction of the second electric arc to drive the second electric arc to move;

[0036] The second magnet assembly further includes a fourth magnet and a fifth magnet spaced apart. The fourth magnet and the fifth magnet are located on the side of the second arc away from the first arc. The fourth magnet and the fifth magnet are used together to increase the movement path of the second arc and increase the contact area between the second arc and the arc extinguishing functional component, so as to cool the second arc, improve the cooling effect on the second arc, and thus improve the disconnection capability of the switching unit.

[0037] In one embodiment, the second magnet assembly is identical to the first magnet assembly. For example, the first, second, fourth, and fifth magnets are all arranged in the same direction, with the north poles of the first and second magnets positioned close to the first electric arc and the south poles positioned away from the first electric arc, and the north poles of the fourth and fifth magnets positioned close to the second electric arc and the south poles positioned away from the second electric arc.

[0038] In one embodiment, the number of magnets included in the second magnet assembly may be the same as or different from the number of magnets included in the first magnet assembly, and there is no limitation thereto.

[0039] In one possible implementation, the first magnet assembly and the second magnet assembly are located on opposite sides of the arc-extinguishing functional component along its radial direction. The first magnet assembly is positioned adjacent to the first stationary contact to enhance the cooling effect on the first arc; the second magnet assembly is positioned adjacent to the second stationary contact to enhance the cooling effect on the second arc. The first magnet assembly is located on the side of the arc-extinguishing functional component along the second direction near the first stationary contact, and the second magnet assembly is located on the side of the arc-extinguishing functional component along the second direction near the second stationary contact. Through the arrangement of the first and second magnet assemblies, when the switching unit is in the open state, the first and second arcs formed can be cooled by being stretched and moved onto the arc-extinguishing functional component by the action of the magnetic field, thereby improving the switching unit's disconnection capability and ensuring the safe operation of the power supply system.

[0040] In one possible implementation, the arc-extinguishing functional component includes a first sub-functional component and a second sub-functional component disposed opposite to each other. The first magnet assembly and the second magnet assembly are located on the side of the first sub-functional component away from the second sub-functional component, and the first magnet assembly is disposed adjacent to the first stationary contact, and the second magnet assembly is disposed adjacent to the second stationary contact, in order to reduce the size of the switching unit. The magnetic field direction inside the magnets of the first and second magnet assemblies is the same as the radial direction of the first sub-functional component, or in other words, the magnetic field direction inside the magnets of the first and second magnet assemblies is coplanar with the first or second sub-functional component.

[0041] In one possible implementation, the magnetic field direction inside the magnet in the first magnet assembly and the second magnet assembly is perpendicular to the first sub-functional element or the second sub-functional element.

[0042] In one possible implementation, the switch includes multiple switching units, with a first magnet assembly and a second magnet assembly distributed between two adjacent switching units. The magnetic field direction inside the magnets of the first and second magnet assemblies is perpendicular to the surfaces of the first and second sub-functional components. Two switching units share a set of the first and second magnet assemblies, which saves magnets and reduces costs.

[0043] In some embodiments, the magnetic field directions of the magnets inside the first magnet assembly and the second magnet assembly may be opposite or the same, or the magnetic field directions of some magnets may be opposite and the magnetic field directions of some magnets may be the same. The specific configuration can be set as needed, and the number of magnets inside the first magnet assembly and the second magnet assembly can also be set as needed.

[0044] In some implementations, the magnetic field directions of the magnets inside the first magnet assembly and the second magnet assembly may intersect, as needed.

[0045] It should be noted that each magnet in the first magnet assembly and the second magnet assembly of this application may be a permanent magnet or a soft magnet, may be a magnet or a magnet doped with metal atoms such as cobalt or nickel, or other magnets that can generate a magnetic field and have magnetic field lines.

[0046] Secondly, this application provides a switching unit used in a switch. The switch includes a knob, a switching unit, and an operating mechanism connected between the knob and the switching unit. The knob can control the switching unit to open or close via the operating mechanism. The switching unit includes an arc-extinguishing component, a stationary contact assembly, a moving contact, and a first magnet assembly. The stationary contact assembly is located inside the arc-extinguishing component. The moving contact is located inside the arc-extinguishing component and can move relative to the stationary contact assembly. When the switching unit is in the closed state, the moving contact is connected to the stationary contact assembly. When the switching unit is in the open state, the moving contact separates from the stationary contact assembly. During the separation process, an electric arc is formed between the moving contact and the stationary contact assembly. At least a portion of the magnetic field lines of the first magnet assembly intersect the current direction of the electric arc to drive the electric arc toward the arc-extinguishing functional component. The first magnet assembly includes a first magnet and a second magnet spaced apart. The first magnet and the second magnet together increase the movement path of the electric arc and increase the contact area between the electric arc and the arc-extinguishing functional component, thereby improving the cooling effect of the arc-extinguishing functional component on the electric arc. The descriptions and modifications of the arc-extinguishing functional component, stationary contact assembly, moving contact, and first magnet assembly in the power supply system in the foregoing implementations are applicable to the arc-extinguishing functional component, stationary contact assembly, moving contact, and first magnet assembly in the switching unit of this embodiment. The descriptions and modifications of the positional relationship between the first magnet assembly and the arc-extinguishing functional component in the power supply system in the foregoing embodiments are applicable to the positional relationship between the first magnet assembly and the arc-extinguishing functional component in the switching unit of this embodiment. Further details are omitted here. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0048] Figure 1 This is a schematic diagram of a power supply system provided in one embodiment of this application;

[0049] Figure 2 This is a schematic diagram of a power conversion device provided in one embodiment of this application;

[0050] Figure 3 This is a three-dimensional structural diagram of a switch provided in one embodiment of this application;

[0051] Figure 4 This is a three-dimensional structural diagram of a switch provided in one embodiment of this application;

[0052] Figure 5a This is a cross-sectional view of the switch when it is closed according to an embodiment of this application;

[0053] Figure 5b This is a cross-sectional view of the switch being open according to one embodiment of this application;

[0054] Figure 6 This is a schematic diagram of the movement of an electric arc under magnetic force in one embodiment of this application;

[0055] Figure 7 This is a schematic diagram of an arc-extinguishing functional component provided in one embodiment of this application;

[0056] Figure 8 This is a diagram showing the relationship between the magnetic field lines distribution and the position of the electric arc of the first magnet assembly provided in one embodiment of this application;

[0057] Figure 9 This is a schematic diagram of the movement of an electric arc under magnetic force in one embodiment of this application;

[0058] Figure 10 This is a diagram showing the relationship between the magnetic field lines distribution of a first magnet and the position of an electric arc, provided in one embodiment.

[0059] Figure 11 This is a schematic diagram of an electric arc moving under the influence of a magnetic field force in one embodiment;

[0060] Figure 12 This is a schematic diagram of a switch provided in one embodiment of this application;

[0061] Figure 13 This is a schematic diagram of the movement of an electric arc under magnetic force in one embodiment of this application;

[0062] Figure 14 This is a schematic diagram of the switch provided in the first embodiment of this application;

[0063] Figure 15 This is a schematic diagram of the switch provided in the first embodiment of this application;

[0064] Figure 16 This is a schematic diagram of the switch provided in the second embodiment of this application;

[0065] Figure 17 This is a schematic diagram of the movement of an electric arc under magnetic force in the second embodiment of this application;

[0066] Figure 18 This is a schematic diagram of the switch provided in the third embodiment of this application;

[0067] Figure 19This is a schematic diagram of the movement of an electric arc under magnetic force in the third embodiment of this application;

[0068] Figure 20 This is a schematic diagram of the switch provided in the fourth embodiment of this application;

[0069] Figure 21 This is a schematic diagram of the switch provided in the fifth embodiment of this application;

[0070] Figure 22 This is a schematic diagram of the switch provided in the sixth embodiment of this application;

[0071] Figure 23 This is a schematic diagram of the switch provided in the seventh embodiment of this application;

[0072] Figure 24 This is a schematic diagram of the movement of an electric arc under magnetic force in the seventh embodiment of this application;

[0073] Figure 25 This is a schematic diagram of the switch provided in the eighth embodiment of this application;

[0074] Figure 26 This is a schematic diagram of the switch provided in the ninth embodiment of this application;

[0075] Figure 27 This is a top view of the switch provided in the ninth embodiment of this application;

[0076] Figure 28 This is a schematic diagram of the switch provided in the tenth embodiment of this application;

[0077] Figure 29 This is a side view of the switch provided in the eleventh embodiment of this application. Detailed Implementation

[0078] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0079] In this document, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0080] Furthermore, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure as shown in the attached drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the structure.

[0081] For ease of understanding, the English abbreviations and related technical terms used in the embodiments of this application will be explained and described below.

[0082] Left-hand rule: Extend your left hand so that your thumb is perpendicular to the other four fingers and in the same plane. Let the magnetic field lines flow into your palm. Your four fingers point in the direction of the current, and your thumb points in the direction of the Ampere force, which is the direction of the force on the conductor.

[0083] Please see Figure 1 , Figure 1 This is a schematic diagram of a power supply system provided in one embodiment of this application. One embodiment of this application provides a power supply system and a switch used in the power supply system. The power supply system includes a control unit, a switch, a DC source, and a power conversion unit. The switch is electrically connected between the DC source and the power conversion unit. The control unit is used to send a tripping signal to the switch when the DC source or the power conversion unit fails. The DC source can be a photovoltaic module, a photovoltaic string, or a series-parallel circuit of photovoltaic modules and photovoltaic strings. The DC source can also be a power conversion unit. The power conversion unit can be a DC / DC converter or a DC / AC converter. Both the DC source and the power conversion unit can be considered as a power supply circuit. When a fault occurs in the power supply circuit, for example, if the DC source or the power conversion unit fails, the control unit detects the occurrence of this fault and can send a tripping signal to the switch. This tripping signal is used to trigger (i.e., drive) the switch to trip, disconnecting the circuit.

[0084] In one embodiment, the control unit can be a separate controller, independent of the DC source and power conversion unit, located in the power supply system and electrically connected to the power conversion unit, DC source, and switch via signal lines. In another embodiment, the power conversion unit can be an independent power conversion device, such as an inverter. In yet another embodiment, the control unit can also be integrated into other functional devices; for example, it can be integrated into the inverter itself, serving as a control circuit or control chip on the inverter's mainboard. In this way, the power conversion device, as an independent device, can automatically trip in any scenario, i.e., automatically trip in the event of a circuit fault.

[0085] The switch provided in this application can be an independent switching device installed in the power supply system, or it can be installed on a functional device within the power supply system. For example, in one embodiment, the switch is installed on a power conversion device. Figure 2As shown, the power conversion device includes a housing 2, a switch 1, and a circuit board 3. The housing 2 encloses a receiving space 21, and the circuit board 3 is disposed within the receiving space 21. The switch 1 includes a knob 12, an operating mechanism 11, and a switching unit 10. The switching unit 10 and the operating mechanism 11 are located within the receiving space 21 and electrically connected to the circuit board 3. The knob 12 is located on one side of the outer surface of the housing 2. In one embodiment, a control unit 31 is provided on the circuit board 3. The control unit 31 is electrically connected to the operating mechanism 11. The control unit 31 is used to send a tripping signal to the operating mechanism 11, enabling the operating mechanism 11 to drive the switching unit 10 to trip. In one embodiment, the operating mechanism 11 has a free-tripping structure.

[0086] Figure 3 This is a perspective view of a switch 1 provided in one embodiment of the present application. The switch 1 includes a switch unit 10 and an operating mechanism 11. The operating mechanism 11 is used to receive a tripping signal and control the switch unit 10 to open or close. In one embodiment, the switch 1 may include a plurality of stacked switch units 10. In one embodiment, the switch 1 also includes a knob 12, which drives the switch unit 10 to open or close via the operating mechanism 11.

[0087] Please see Figure 4 , Figure 5a and Figure 5b , Figure 4 This is a perspective view of switch 1 when it is open, according to one embodiment of this application. Figure 5a Cross-sectional view when switch 1 is closed. Figure 5b for Figure 4 A cross-sectional view of the switch 1 when it is open. The switch unit 10 includes an arc-extinguishing component 140, a stationary contact assembly 120, a moving contact 130, and a first magnet assembly 110. The stationary contact assembly 120 is located inside the arc-extinguishing component 140. The moving contact 130 is located inside the arc-extinguishing component 140 and can move relative to the stationary contact assembly 120. When the operating mechanism 11 receives a tripping signal, it controls the switch unit 10 to open, so that the moving contact 130 separates from the stationary contact assembly 120. During the separation process of the moving contact 130 and the stationary contact assembly 120... An electric arc 100 is formed between the two. At least a portion of the magnetic field lines of the first magnet assembly 110 intersect the current direction of the electric arc 100 to drive the electric arc 100 toward the arc extinguishing function 140. The first magnet assembly 110 includes a first magnet 111 and a second magnet 112 arranged at intervals. The first magnet 111 and the second magnet 112 are used together to increase the movement path of the electric arc 100 and increase the contact area between the electric arc 100 and the arc extinguishing function 140, thereby improving the cooling effect of the arc extinguishing function 140 on the electric arc 100.

[0088] When switch 1 is in the closed state, switch unit 10 is also in the closed state. At this time, the stationary contact assembly 120 is connected to the moving contact 130, and current is conducted between the stationary contact assembly 120 and the moving contact 130 (e.g., ...). Figure 5a (As shown); When switch 1 is in the open state, switch unit 10 is in the open state. At this time, the stationary contact assembly 120 is separated from the moving contact 130, and the current between the stationary contact assembly 120 and the moving contact 130 is cut off (as shown). Figure 5b (As shown).

[0089] During the separation of the stationary contact assembly 120 and the moving contact 130, a high-temperature, brightly lit, and highly conductive gas arc 100 is generated between them. This arc 100 is a gas discharge phenomenon; it is lightweight and easily changes shape. The generation of the arc 100 prolongs the circuit's opening time. If a circuit fault occurs in the power supply system requiring the switch 1 to be disconnected, the arc 100 prevents the switch 1 from opening in time, potentially causing greater damage to the power supply system. Furthermore, the high temperature of the arc 100 can easily deform and melt the stationary contact assembly 120 and the moving contact 130, even leading to an explosion of the switch 1 and burns to personnel. The bright light from the arc 100 can also damage eyesight. Finally, the conductivity of the arc 100 can easily cause short circuits in other equipment, endangering the safe operation of the power supply system and causing significant personal injury and property damage.

[0090] Figure 4 and Figure 5b The shape of the electric arc 100 is only schematic. In reality, the shape of the electric arc 100 may be curved or other shapes due to the influence of the surrounding environment.

[0091] Both the first magnet 111 and the second magnet 112 are substances or materials capable of generating a magnetic field. Both magnets have two poles: a magnetic north pole (N) and a magnetic south pole (S). In this embodiment, both magnets are bar magnets. The north pole (N) and south pole (S) of the first magnet 111 are located at its two ends. The direction of the magnetic field lines outside the first magnet 111, i.e., the direction of the magnetic field, is from the north pole (N) to the south pole (S), and the direction of the magnetic field outside the first magnet 111 is from the south pole (S) to the north pole (N). In this embodiment, the arrangement direction of the first magnets 111 and the second magnet 112 is approximately the same as the extension direction of the electric arc 100, to better extend the length of the electric arc 100 and improve its cooling effect. In one embodiment, both the first magnet 111 and the second magnet 112 are permanent magnets, capable of maintaining magnetism for a long time and not easily demagnetized or magnetized, allowing the first magnet 111 and the second magnet 112 to function stably and continuously in the switch 1. In another embodiment, both the first magnet 111 and the second magnet 112 are soft magnets, or one of the first magnet 111 and the second magnet 112 is a permanent magnet, while the other is a soft magnet.

[0092] In physics, the direction of a magnetic field can be represented by "×" and "·", where "×" represents the direction perpendicular to the paper and pointing inwards (e.g., ...). Figure 13 As shown), "·" indicates a direction perpendicular to the paper and outwards (e.g. Figure 6 As shown in the figure, in this embodiment, "×" and "·" only indicate the direction of the magnetic field, and the density of "×" and "·" does not represent the magnetic field line density and magnetic field strength.

[0093] The electric arc 100 is located in the magnetic field of the first magnet 111 and the second magnet 112, and the direction of the current in the electric arc 100 intersects the direction of the magnetic field lines of at least a portion of the first magnet 111 and the second magnet 112. The electric arc 100 moves under the action of the magnetic field force. The direction of the movement of the electric arc 100 can be determined according to the left-hand rule. Furthermore, by adjusting the placement and polarity of the first magnet 111 and the second magnet 112, the direction of the magnetic field force on the electric arc 100 can be adjusted, thereby adjusting the direction of the movement of the electric arc 100.

[0094] Please see Figure 6 , Figure 6 This is a schematic diagram of the movement of electric arc 100 under the influence of magnetic force. The dashed line of electric arc 100 represents the shape of electric arc 100 before being subjected to magnetic force, and the solid line of electric arc 100 represents the shape of electric arc 100 after being subjected to magnetic force. After being subjected to magnetic force, electric arc 100 is stretched. The longer the length of electric arc 100, the easier it is to be cooled.

[0095] The arc extinguishing component 140 is used to cool the electric arc 100 and to isolate the internal components such as the stationary contact assembly 120 and the moving contact 130 within the arc extinguishing component 140 from the external environment.

[0096] In one possible implementation, the arc-extinguishing functional component includes at least one of an insulating shell or a metal grid assembly. The insulating shell is made of insulating material and is capable of effectively cooling the electric arc. The metal grid assembly includes an insulating plate and metal sheets located within the insulating plate. The metal sheets in the metal grid assembly are not connected to the moving contact but are insulated from it by the insulating plate. The metal sheets enhance the cooling effect on the electric arc.

[0097] In such Figure 7 In the illustrated embodiment, the arc-extinguishing functional component 140 can be a cuboid or cube with six sides. When the switch 1 is in the open state, the current direction of the arc 100 is from the fifth sub-functional component 145 of the arc-extinguishing functional component 140 to the sixth sub-functional component 146. By adjusting the first magnet assembly 110, the arc 100 can move to the arc-extinguishing functional component 140 around the arc 100, such as... Figure 7 The first sub-functional component 141, the second sub-functional component 142, the third sub-functional component 143, and the fourth sub-functional component 144 in the circuit are used to cool and extinguish the electric arc 100 and to completely disconnect the switch 1, thereby improving the disconnecting capacity of the switch 1. When the arc-extinguishing functional component 140 is an insulating shell, the first sub-functional component 141, the second sub-functional component 142, the third sub-functional component 143, the fourth sub-functional component 144, the fifth sub-functional component 145, and the sixth sub-functional component 146 are the six side walls of the insulating shell, respectively.

[0098] In one embodiment, the arc extinguishing function 140 may also include only the first sub-function 141 and the second sub-function 142, and the first magnet assembly 110 drives the electric arc 100 to the first sub-function 141 and / or the second sub-function 142.

[0099] In one embodiment, the arc extinguishing function 140 may also include only the first sub-function 141, and the first magnet assembly 110 drives the electric arc 100 onto the first sub-function 141.

[0100] In one embodiment, the electric arc 100 may also move to other insulating components within the arc-extinguishing functional component 140, in which case the arc-extinguishing functional component 140 may also be a common housing.

[0101] In one embodiment, the inner wall of the arc-extinguishing functional component 140 has an insulating coating to make the arc-extinguishing functional component 140 insulating.

[0102] In one embodiment, the arc-extinguishing functional component 140 may also be other three-dimensional shapes such as a sphere, cylinder, or prism.

[0103] Because the magnetic field lines of the first magnet 111 and the second magnet 112 are not uniformly distributed, the density of the magnetic field lines varies at different locations. Please refer to [link / reference needed]. Figure 8 , Figure 8 This is a diagram showing the relationship between the magnetic field lines distribution of the first magnet assembly 110 and the position of the electric arc 100. Figure 8 The electric arc 100 is the electric arc 100 before being subjected to a magnetic field force. The current direction of the electric arc 100 is the third direction Z. The magnetic field density is high at the center line CL1 of the first magnet 111 and the center line CL2 of the second magnet 112. From the center line CL1 along the third direction Z to both sides of the center line CL1, the magnetic field density gradually decreases. From the center line CL2 along the third direction Z to both sides of the center line CL2, the magnetic field density gradually decreases, making the magnetic field force on the electric arc 100 at the center line CL1 and center line CL2 the greatest. After the electric arc 100 is subjected to a magnetic field force, the movement path of the electric arc 100 in the region of the greatest magnetic field force (i.e., the positions of center line CL1 and center line CL2) is long, and the electric arc 100 in this region is the first to contact the arc extinguishing functional component 140. The overall shape of the electric arc 100 is a large "U" shape (e.g., ...). Figure 6 As shown), in one embodiment, if the first magnet 111 and the second magnet 112 are far apart, the shape of the electric arc 100 can also be "W" shaped (as shown). Figure 9 As shown, the arc 100 is elongated at both the center line CL1 and the center line CL2, so that the two ends of the arc 100 along the third direction Z can be better cooled.

[0104] If the first magnet assembly 110 is provided with only one magnet, for example, the first magnet assembly 110 only includes the first magnet 111 (e.g. Figure 10 and Figure 11 As shown, the shape of the electric arc 100 after being moved by the magnetic field is "V". The electric arc 100 is only stretched in the middle position. Compared with this embodiment, when only one magnet is set, the electric arc 100 is stretched to a smaller extent by the force, and the electric arc 100 is only stretched in the middle position. The electric arc 100 is stretched to a smaller extent at both ends along the third direction Z, and cannot obtain a good cooling effect.

[0105] In this embodiment, through the combined action of the first magnet 111 and the second magnet 112 in the first magnet assembly 110, on the one hand, the arc 100 is simultaneously subjected to the magnetic field forces of the first magnet 111 and the second magnet 112. The arc 100 is stretched by the magnetic field forces of the two magnets, resulting in a greater degree of bending and elongation of the arc 100, which is more conducive to the cooling of the arc 100. On the other hand, the two ends of the arc 100 near the stationary contact assembly 120 and the moving contact 130 are the parts of the arc 100 with higher temperatures. Since two magnets, namely the first magnet 111 and the second magnet 112, are provided, the first magnet 111 and the second magnet 112... The areas with the highest magnetic field density in magnet 112 are located on the side near the stationary contact assembly 120 and the side near the moving contact 130, respectively. This places the ends of arc 100 near the stationary contact assembly 120 and the moving contact 130 in positions with higher magnetic field strength. The arc 100 experiences a larger magnetic force and a longer movement path in the higher temperature areas, which is more conducive to improving the cooling efficiency of arc 100. On the other hand, the arc 100 is moved to the arc extinguishing functional component 140 by the action of the magnetic force, and the arc extinguishing functional component 140 performs secondary cooling on arc 100, maximizing the breaking capacity of switch 1. Moreover, the arc extinguishing functional component 140 has a simple structure and low cost.

[0106] Please continue reading. Figure 5a and Figure 5b In one possible implementation, the stationary contact assembly 120 includes a first stationary contact 121 and a second stationary contact 122 spaced apart, and the moving contact 130 includes a first end 131 and a second end 132 disposed opposite to each other. The operating mechanism 11 can control the moving contact 130 to rotate. When the switching unit 10 is in the closed state (e.g., ...), Figure 5a As shown), the first end 131 and the second end 132 are respectively connected to the first stationary contact 121 and the second stationary contact 122 to conduct current; when the switching unit 10 is in the open state, the moving contact 130 rotates to separate the first end 131 from the first stationary contact 121 and the second end 132 from the second stationary contact 122 (as shown). Figure 5b As shown, the current is cut off, and a first electric arc 101 is formed between the first end 131 and the first stationary contact 121. The first magnet 111 and the second magnet 112 are located on one side of the first electric arc 101. The first magnet 111 and the second magnet 112 are used together to increase the movement path of the first electric arc 101 and increase the contact area between the first electric arc 101 and the arc extinguishing function 140. Through the arrangement of the first stationary contact 121 and the second stationary contact 122, and the first end 131 and the second end 132 of the moving contact 130, the connection performance of the switching unit 10 is better, and the breaking capacity of the switching unit 10 is improved.

[0107] In such Figure 4 and Figure 5bIn the illustrated embodiment, the arc-extinguishing functional component 140 includes a first sub-functional component 141 and a second sub-functional component 142 arranged in parallel along a first direction X. A stationary contact assembly 120 and a moving contact 130 are located between the first sub-functional component 141 and the second sub-functional component 142. The moving contact 130 is fixed to the arc-extinguishing functional component 140. The moving contact 130 and the arc-extinguishing functional component 140 can rotate simultaneously relative to the stationary contact assembly 120. A first magnet assembly 110 is located on one side of the arc-extinguishing functional component 140 along a second direction Y, which intersects with the first direction X. The first magnet 111 is positioned close to the first stationary contact 121, and the second magnet 112 is positioned close to the first end of the moving contact 130. The operating mechanism 11 controls the simultaneous counterclockwise rotation of the arc-extinguishing functional component 140 and the moving contact 130, causing the moving contact 130 to separate from the stationary contact assembly 120, thus changing the switch 1 from a closed state to an open state.

[0108] For example, when switch 1 is closed, the current direction A flows sequentially from the first stationary contact 121 and the moving contact 130 into the second stationary contact 122. When switch 1 is open, the current direction of the arc 100 generated between the first stationary contact 121 and the moving contact 130 is the third direction Z (e.g., ...). Figure 5b As shown), the current direction of the arc 100 is from the first stationary contact 121 to the moving contact 130. The arc 100 moves towards the first sub-functional component 141 under the action of the magnetic force F (as shown). Figure 6 As shown in the diagram, the third direction Z intersects both the first direction X and the second direction Y. In one embodiment, the first direction X, the second direction Y, and the third direction Z are approximately perpendicular. In this embodiment, the first sub-functional component 141 and the second sub-functional component 142 are circular with equal outer diameters. In other embodiments, the shapes of the first sub-functional component 141 and the second sub-functional component 142 can also be square, elliptical, or irregular shapes, etc. The shapes and sizes of the first sub-functional component 141 and the second sub-functional component 142 can be the same or different.

[0109] In this design, the first end 131 and the second end 132 of the moving contact 130 are both fixed to the arc-extinguishing functional component 140. When the arc-extinguishing functional component 140 rotates, it can simultaneously drive the first end 131 and the second end 132 to rotate. The extension direction of the first stationary contact 121 is parallel to the extension direction of the second stationary contact 122, and the first stationary contact 121 and the second stationary contact 122 are distributed at 180° on the arc-extinguishing functional component 140 (e.g., ...). Figure 5b As shown), the first end 131 and the second end 132 of the moving contact 130 are also distributed at 180° on the arc extinguishing function 140, so that when the first end 131 of the moving contact 130 is connected or disconnected from the first stationary contact 121, the second end 132 is connected or disconnected from the second stationary contact 122.

[0110] In one embodiment, the extension direction of the first stationary contact 121 and the extension direction of the second stationary contact 122 may intersect at an angle. The first end 131 and the second end 132 of the moving contact 130 are angularly distributed, as long as the second end 132 is simultaneously connected or separated from the first stationary contact 121 when the first end 131 is connected or separated from the first stationary contact 121. The moving contact 130 can be rotated 90° to change the switch unit 10 from the closed state to the open state. In other embodiments, the rotation angle of the moving contact 130 may also be other angles, such as 30°, 45°, 60°, 75°, etc. The moving contact 130 may rotate clockwise or counterclockwise, and there is no limitation on the rotation direction and angle of the moving contact 130.

[0111] The first stationary contact 121 is connected to the circuit board 3 at the end away from the moving contact 130, and the second stationary contact 122 is connected to the circuit board 3 at the end away from the moving contact 130, so that the switching unit 10 is connected to the circuit board 3. When the switching unit 10 is disconnected, the corresponding circuit in the control circuit board 3 is disconnected to achieve safety protection.

[0112] In one embodiment, the stationary contact assembly 120 is fixed relative to the arc-extinguishing functional component 140, and the moving contact 130 can rotate relative to the stationary contact assembly 120 and the arc-extinguishing functional component 140. The operating mechanism 11 controls the moving contact 130 to rotate counterclockwise, and the moving contact 130 separates from the stationary contact assembly 120, so that the switch 1 changes from the closed state to the open state.

[0113] In one embodiment, the arc-extinguishing functional component 140 is an integral structure, and the first sub-functional component 141 and the second sub-functional component 142 are integrally formed, resulting in high strength. In one embodiment, the arc-extinguishing functional component 140 and the moving contact 130 are an integral structure. In another embodiment, the first sub-functional component 141 and the moving contact 130 are an integral structure, and the second sub-functional component 142 is an integral structure. The first sub-functional component 141 and the second sub-functional component 142 are connected to form the arc-extinguishing functional component 140 by welding, bonding, or other methods.

[0114] In this embodiment, the arc-extinguishing functional component 140 is provided with only a first sub-functional component 141 and a second sub-functional component 142. The first sub-functional component 141 is positioned close to the second sub-functional component 142, making the arc-extinguishing functional component 140 flat. On the one hand, this allows the arc 100 to contact the arc-extinguishing functional component 140 through a shorter path, increasing the contact between the arc 100 and the arc-extinguishing functional component 140. Furthermore, by introducing the arc 100 onto the relatively large areas of the first sub-functional component 141 and the second sub-functional component 142, the cooling effect of the arc is improved. On the other hand, the thickness of the arc-extinguishing functional component 140 in the first direction X is reduced, thereby reducing the size of the arc-extinguishing functional component 140 and making it suitable for various miniaturized scenarios.

[0115] In one embodiment, the first end 131 of the moving contact 130 includes a first connecting block (not shown) and a second connecting block (not shown) spaced apart. The first connecting block is fixed to the side of the first sub-functional component 141 near the second sub-functional component 142, and the second connecting block is fixed to the side of the second sub-functional component 142 near the first sub-functional component 141. When the switch unit is in the closed state, the first stationary contact 121 is located between the first connecting block and the second connecting block, so that the first stationary contact 121 is electrically connected to the first end 131 of the moving contact 130. In another embodiment, the second end 132 of the moving contact 130 includes a third connecting block and a fourth connecting block spaced apart. The third connecting block is fixed to the side of the first sub-functional component 141 near the second sub-functional component 142, and the fourth connecting block is fixed to the side of the second sub-functional component 142 near the first sub-functional component 141. When the switch unit is in the closed state, the second stationary contact 122 is located between the third connecting block and the fourth connecting block, so that the second stationary contact 122 is electrically connected to the second end 132 of the moving contact 130.

[0116] In this embodiment, the first magnet 111 and the second magnet 112 are arranged in the same direction (e.g., Figure 5b As shown), this drives the first electric arc 101 to move towards the same side of the arc-extinguishing functional element 140, increasing the movement path of the first electric arc 101 and the contact area between the first electric arc 101 and the arc-extinguishing functional element 140. The first magnet 111 and the second magnet 112 being arranged in the same direction means that the north pole N and south pole S of the first magnet 111 and the second magnet 112 are arranged in the same direction. In this embodiment, the south pole S of the first magnet 111 and the second magnet 112 are both positioned close to the first electric arc 101, and the north pole N is positioned far away from the first electric arc 101 (e.g., ...). Figure 5b As shown), the arrangement direction of the South Pole S and the North Pole N is coplanar with the surface of the first sub-functional component 141 or the second sub-functional component 142.

[0117] Please continue reading. Figure 5a and Figure 5b The direction of the current in the first arc 101 affects the direction of movement of the first arc 101 after being subjected to a magnetic force. If the switch unit 10 is in the closed state, the current direction is from the first stationary contact 121 to the second stationary contact 122. Then, when the switch unit 10 is open, the current direction of the first arc 101 is from the first stationary contact 121 to the first end 131 of the moving contact 130 (e.g., ...). Figure 5b As shown), that is, the third direction Z; the current direction of the second arc 102 is from the second end 132 of the automatic contact 130 to the second stationary contact 122, that is, the third direction Z.

[0118] In one embodiment, the second magnet 112 is located on the side of the first magnet 111 along the third direction Z. The south pole S of both the first magnet 111 and the second magnet 112 is located close to the first electric arc 101, while the north pole N is located away from the first electric arc 101 (e.g., Figure 5b As shown), the first magnet 111 and the second magnet 112 together drive the first electric arc 101 to move toward the first sub-functional component 141 (as shown). Figure 6 As shown, the first electric arc 101 is simultaneously subjected to the magnetic force of the first magnet 111 and the second magnet 112, which causes the first electric arc 101 to be stretched to a greater extent, which is more conducive to the cooling of the first electric arc 100.

[0119] Please see Figure 12 and Figure 13 , Figure 12 This is a schematic diagram of a switch provided in one embodiment of this application. Figure 13 yes Figure 12 A schematic diagram of the movement of the electric arc under the influence of a magnetic field. In this embodiment, the north poles N of both the first magnet 111 and the second magnet 112 are positioned close to the first electric arc 101, while the south pole S is positioned far away from the first electric arc 101 (e.g., ...). Figure 12 (As shown). The second magnet 112 is located on the side of the first magnet 111 along the third direction Z. The north poles N of both the first magnet 111 and the second magnet 112 are positioned close to the first electric arc 101, while the south pole S is positioned away from the first electric arc 101 (as shown). Figure 12 As shown), the first magnet 111 and the second magnet 112 together drive the first electric arc 101 to move toward the second sub-functional component 142 (as shown). Figure 13 As shown, the first electric arc 101 is simultaneously subjected to the magnetic force of the first magnet 111 and the second magnet 112, which causes the first electric arc 101 to be stretched to a greater extent, which is more conducive to the cooling of the electric arc 100.

[0120] In one possible implementation, the extending direction of the first magnet 111 intersects the extending direction of the second magnet 112 (e.g., Figure 14 As shown, this configuration allows the magnet assembly 110 to exert a greater driving force on the first arc 101 and reduces the size of the switch 1. The first magnet 111 and the second magnet 112 are disposed close to the arc-extinguishing functional component 140 and the first arc 101. In this embodiment, the arc-extinguishing functional component 140 is circular, and the surfaces of the first magnet 111 and the second magnet 112 near the arc-extinguishing functional component 140 are perpendicular to the radial direction of the arc-extinguishing functional component 140. On the one hand, the magnet assembly 110's close proximity to the first arc 101 increases the magnetic field force on the first arc 101, allowing the magnet assembly 110 to better drive the first arc 101 and facilitating its cooling. On the other hand, the close proximity of the magnet assembly 110 reduces the size of the switch unit 10, thereby reducing the size of the switch 1.

[0121] In one embodiment, the extending direction of the first magnet 111 may also be parallel to the extending direction of the second magnet 112 (e.g., Figure 12 As shown, the first magnet 111 and the second magnet 112 are on the same straight line.

[0122] In one possible implementation, the extending direction of the first magnet 111 is the same as the extending direction of the second magnet 112, and the direction of the magnetic field lines inside the first magnet 111 intersects the direction of the magnetic field lines inside the second magnet 112 (e.g., ...). Figure 15 As shown, the first electric arc 101 is brought into contact with the arc-extinguishing component 140. The direction of the magnetic field lines inside the first magnet 111 is from the south pole (S) to the north pole (N) of the first magnet 111, and the direction of the magnetic field lines inside the second magnet 112 is from the south pole (S) to the north pole (N) of the second magnet 112. In actual scenarios, the first electric arc 101 may be curved, and the arc-extinguishing component 140 may be an uneven shell. The direction of the magnetic field lines inside the first magnet 111 and the direction of the magnetic field lines inside the second magnet 112 differs from the direction of the magnetic field lines by a preset angle. By adjusting the direction of the magnetic field, the movement direction of the first electric arc 101 is controlled so that the first electric arc 101 moves to the arc-extinguishing component 140 more quickly, which facilitates the cooling of the first electric arc 101.

[0123] In one embodiment, the direction of the magnetic field lines inside the first magnet 111 is parallel to the direction of the magnetic field lines inside the second magnet 112 (e.g., Figure 12 (As shown).

[0124] In one embodiment, the thickness of the first magnet assembly 110 in the first direction X is greater than the thickness of the arc extinguishing functional component 140 in the first direction X, so that the first electric arc 101 can be better subjected to the magnetic field force and move, thereby improving the cooling rate of the first electric arc 101.

[0125] Please continue reading. Figure 5bIn one possible implementation, the switching unit 10 further includes a second magnet assembly 150. When the switching unit 10 is in the open state, a second electric arc 102 is formed between the second end 132 of the moving contact 130 and the second stationary contact 122. The first magnet 111 and the second magnet 112 are located on the side of the first electric arc 101 away from the second electric arc 102. At least a portion of the magnetic field lines of the second magnet assembly 150 intersect the current direction of the second electric arc 102 to drive the second electric arc 102 to move. The dual magnet assembly 150 also includes a fourth magnet 151 and a fifth magnet 152 spaced apart. The fourth magnet 151 and the fifth magnet 152 are located on the side of the second arc 102 away from the first arc 101. The fourth magnet 151 and the fifth magnet 152 are used together to increase the movement path of the second arc 102 and increase the contact area between the second arc 102 and the arc extinguishing function 140, so as to cool the second arc 102, improve the cooling effect on the second arc 102, and thus improve the disconnection capability of the switching unit 10.

[0126] In one embodiment, the second magnet assembly 150 is identical to the first magnet assembly 110; for example, the first magnet 111, the second magnet 112, the fourth magnet 151, and the fifth magnet 152 are all arranged in the same direction (e.g., Figure 5b As shown, the north poles N of the first magnet 111 and the second magnet 112 are both located close to the first electric arc 101, and the south pole S is located away from the first electric arc 101. The north poles N of the fourth magnet 151 and the fifth magnet 152 are both located close to the second electric arc 102, and the south pole S is located away from the second electric arc 102.

[0127] In one embodiment, the number of magnets included in the second magnet assembly 150 may be the same as or different from the number of magnets included in the first magnet assembly 110, and there is no limitation thereto.

[0128] In one possible implementation, the first magnet assembly 110 and the second magnet assembly 150 are located on both sides of the arc-extinguishing functional member 140 along the radial direction of the arc-extinguishing functional member 140. The first magnet assembly 110 is disposed adjacent to the first stationary contact 121 to enhance the cooling effect on the first arc 101; the second magnet assembly 150 is disposed adjacent to the second stationary contact 122 to enhance the cooling effect on the second arc 102. The first magnet assembly 110 is located on the side of the arc-extinguishing functional member 140 along the second direction X near the first stationary contact 121, and the second magnet assembly 150 is located on the side of the arc-extinguishing functional member 140 along the second direction X near the second stationary contact 122. Through the arrangement of the first magnet assembly 110 and the second magnet assembly 150, when the switching unit 10 is in the open state, the first arc 101 and the second arc 102 formed can be cooled by being stretched and moved onto the arc-extinguishing functional member 140 by the action of magnetic force, thereby improving the disconnection capability of the switching unit 10 and ensuring the safe operation of the power supply system.

[0129] Please see Figure 16 and Figure 17 As shown, Figure 16 This is a schematic diagram of switch 1 provided in the second embodiment of this application. Figure 17 This is a schematic diagram of the movement of the electric arc 100 under the magnetic force in the second embodiment of this application. The difference from the first embodiment is that the first magnet assembly 110 further includes a third magnet 113. The first magnet 111, the second magnet 112 and the third magnet 113 are all arranged in the same direction to drive the first electric arc 101 to move toward the same side of the arc extinguishing functional component 140, thereby increasing the movement path of the first electric arc 101 and increasing the contact area between the first electric arc 101 and the arc extinguishing functional component 140.

[0130] In one embodiment, the first magnet 111, the second magnet 112, and the third magnet 113 are arranged sequentially along the third direction Z. The north poles N of the first magnet 111, the second magnet 112, and the third magnet 113 are all located close to the first electric arc 101, while the south pole S is located away from the first electric arc 101. The first magnet 111, the second magnet 112, and the third magnet 113 jointly drive the first electric arc 101 to move toward the second sub-functional component 142. The first electric arc 101 is simultaneously subjected to the magnetic field forces of the three magnets, which makes the first electric arc 101 more elongated, which is more conducive to the cooling of the electric arc 101. Furthermore, the two ends of the first electric arc 101 with higher temperatures are stretched to a greater extent, which is more conducive to improving the cooling efficiency of the first electric arc 101.

[0131] In one embodiment, the first magnet 111, the second magnet 112, and the third magnet 113 are arranged sequentially along the third direction Z. The south pole S of the first magnet 111, the second magnet 112, and the third magnet 113 are all located close to the first electric arc 101, while the north pole N is located away from the first electric arc 101. The first magnet 111, the second magnet 112, and the third magnet 113 jointly drive the first electric arc 101 to move toward the first sub-functional component 141. The first electric arc 101 is simultaneously subjected to the magnetic force of the three magnets, which makes the first electric arc 101 more elongated, which is more conducive to the cooling of the electric arc 101. Furthermore, the two ends of the first electric arc 101 with higher temperatures are stretched to a greater extent, which is more conducive to improving the cooling efficiency of the first electric arc 101.

[0132] In one possible implementation, the extending directions of the first magnet 111, the second magnet 112, and the third magnet 113 all intersect, resulting in a greater driving force of the magnet assembly 110 on the first arc 101 and a smaller size of the switch 1. In one embodiment, the extending directions of the first magnet 111 and the second magnet 112 are the same, but intersect with the extending direction of the third magnet 113. In another embodiment, the extending directions of the first magnet 111, the second magnet 112, and the third magnet 113 are all the same.

[0133] In some embodiments, the first magnet assembly 110 may also include more magnets arranged in the same direction, the number of which can be set as needed.

[0134] Please see Figure 18 and Figure 19 , Figure 18 This is a schematic diagram of switch 1 provided in the third embodiment of this application. Figure 19 This is a schematic diagram of the movement of the electric arc 100 under magnetic force in the third embodiment of this application. The third embodiment of this application provides a power supply system, which differs from the first embodiment in that the arc extinguishing function 140 includes a first sub-function 141 and a second sub-function 142 arranged opposite to each other. The first magnet 111 and the second magnet 112 are arranged in opposite directions. The first magnet 111 is used to drive a portion of the first electric arc 101 to move toward the first sub-function 141, and the second magnet 112 is used to drive a portion of the first electric arc 101 to move toward the second sub-function 142, so as to increase the movement path of the first electric arc 101. The first magnet 111 is used to increase the contact area between the first electric arc 101 and the first sub-function 141, and the second magnet 112 is used to increase the contact area between the first electric arc 101 and the second sub-function 142, so that both the first sub-function 141 and the second sub-function 142 are used to cool the first electric arc. The reverse arrangement of the first magnet 111 and the second magnet 112 means that the north pole N and south pole S of the first magnet 111 and the second magnet 112 are arranged in opposite directions, that is, the south pole S of the first magnet 111 is set closer to the first electric arc 101 and the north pole N is set farther away from the first electric arc 101 (e.g., Figure 18 As shown), the north pole N of the second magnet 112 is positioned close to the first electric arc 101, while the south pole S is positioned away from the first electric arc 101. By arranging the first magnet 111 and the second magnet 112 in opposite directions, the shape of the first electric arc 101 is approximately "S" shaped (as shown). Figure 19 As shown, on the one hand, the length of the first electric arc 101 is lengthened, which is conducive to the rapid cooling of the first electric arc 101; on the other hand, the first sub-functional component 141 and the second sub-functional component 142 are fully utilized to cool the first electric arc 101, increasing the area of ​​the arc extinguishing functional component 140 that can be used to cool the first electric arc 101, thereby improving the cooling effect and efficiency of the first electric arc 101.

[0135] In one embodiment, the first magnet 111 and the second magnet 112 are arranged in opposite directions. The north pole N of the first magnet 111 is positioned close to the first electric arc 101 and the south pole S is positioned away from the first electric arc 101, so as to drive a portion of the first electric arc 101 to move toward the second sub-functional component 142. The south pole S of the second magnet 112 is positioned close to the first electric arc 101 and the north pole N is positioned away from the first electric arc 101, so as to drive a portion of the first electric arc 101 to move toward the first sub-functional component 141.

[0136] Please see Figure 20 , Figure 20 This is a schematic diagram of the switch 1 provided in the fourth embodiment of this application. The fourth embodiment of this application provides a power supply system. The difference from the third embodiment is that the first magnet assembly 110 further includes a third magnet 113. The first magnet 111, the second magnet 112 and the third magnet 113 are arranged in sequence, and the third magnet 113 is arranged in the opposite direction to the second magnet 112. The third magnet 113 is used to drive part of the first arc 101 to move toward the first sub-functional component 141 to increase the movement path of the first arc 101. The third magnet 113 is used to increase the contact area between the first arc 101 and the first sub-functional component 141 to improve the cooling effect of the first sub-functional component 141 on the first arc 101.

[0137] The sequential arrangement of the first magnet 111, the second magnet 112, and the third magnet 113 defines their relative positional relationship. The first magnet 111 and the third magnet 113 are located on opposite sides of the second magnet 112 along the third direction Z. The reverse arrangement of the third magnet 113 and the second magnet 112 means that the north pole N and south pole S of the third magnet 113 and the second magnet 112 are arranged in opposite directions. In this embodiment, the third magnet 113 and the second magnet 112 are arranged in opposite directions, and the third magnet 113 and the first magnet 111 are arranged in the same direction. That is, the south pole S of the first magnet 111 and the north pole N of the third magnet 113 are set close to the first electric arc 101 and the north pole N is set away from the first electric arc 101, and the north pole N of the second magnet 112 is set close to the first electric arc 101 and the south pole S is set away from the first electric arc 101.

[0138] By arranging the first magnet 111, the second magnet 112, and the third magnet 113, the shape of the first electric arc 101 is roughly "W"-shaped or wavy. On the one hand, the first electric arc 101 is lengthened by the magnetic force of the three magnets, which is more conducive to the rapid cooling of the first electric arc 101. On the other hand, by making full use of the first sub-functional component 141 and the second sub-functional component 142 to cool the first electric arc 101, the area of ​​the arc extinguishing functional component 140 that can be used to cool the first electric arc 101 is increased, thereby improving the cooling effect and efficiency of the first electric arc 101. Furthermore, the first electric arc 101 is stretched to a greater extent at the two ends with higher temperatures by the magnetic force of the three magnets, which is more conducive to improving the cooling efficiency of the first electric arc 101.

[0139] In one embodiment, the third magnet 113 is arranged in opposite directions to the second magnet 112 and in the same direction as the first magnet 111. Alternatively, the north pole (N) of the first magnet 111 and the third magnet 113 are positioned close to the first arc 101, while the south pole (S) is positioned away from the first arc 101. Similarly, the south pole (S) of the second magnet 112 is positioned close to the first arc 101, while the north pole (N) is positioned away from the first arc 101. In this case, the first magnet 111 and the third magnet 113 drive the portion of the first arc 101 to move towards the second sub-functional component 142, and the second magnet 112 drives the portion of the first arc 101 to move towards the first sub-functional component 141, causing the first arc 101 to... The shape is roughly "M". On the one hand, the first arc 101 is stretched by the magnetic force of the three magnets at the same time, which is conducive to the rapid cooling of the first arc 101. On the other hand, by making full use of the first sub-functional component 141 and the second sub-functional component 142 to cool the first arc 101, the area of ​​the arc extinguishing functional component 140 that can be used to cool the first arc 101 is increased, thereby improving the cooling effect and efficiency of the first arc 101. Furthermore, the first arc 101 is stretched to a greater extent at the two ends with higher temperatures due to the magnetic force of the three magnets at the same time, which is more conducive to improving the cooling efficiency of the first arc 101.

[0140] Please see Figure 21 , Figure 21This is a schematic diagram of the switch 1 provided in the fifth embodiment of this application. The fifth embodiment of this application provides a power supply system. The difference from the third embodiment is that the first magnet assembly 110 further includes a third magnet 113. The first magnet 111, the second magnet 112 and the third magnet 113 are arranged in sequence. The third magnet 113 is arranged in the same direction as the second magnet 112. The third magnet 113 is used to drive part of the first arc 101 to move toward the second sub-functional component 142 to increase the movement path of the first arc 101. The third magnet 113 is used to increase the contact area between the first arc 101 and the second sub-functional component 142 to improve the cooling effect of the second sub-functional component 142 on the first arc 101. In this embodiment, the third magnet 113 is arranged in the same direction as the second magnet 112 and in the opposite direction to the first magnet 111. That is, the south pole S of the first magnet 111 is set close to the first electric arc 101 and the north pole N is set away from the first electric arc 101. The north pole N of the second magnet 112 and the south pole S of the third magnet 113 are set close to the first electric arc 101 and away from the first electric arc 101. By arranging the first magnet 111, the second magnet 112, and the third magnet 113, the shape of the first electric arc 101 is approximately "S" shaped. On the one hand, the first electric arc 101 is lengthened by the magnetic force of the three magnets simultaneously, which is more conducive to the rapid cooling of the first electric arc 101. On the other hand, by making full use of the first sub-functional component 141 and the second sub-functional component 142 to cool the first electric arc 101, the area of ​​the arc-extinguishing functional component 140 that can be used to cool the first electric arc 101 is increased, thereby improving the cooling effect and efficiency of the first electric arc 101. Furthermore, the first electric arc 101 is stretched to a greater extent at the two ends with higher temperatures due to the simultaneous magnetic force of the three magnets, which is more conducive to improving the cooling efficiency of the first electric arc 101.

[0141] In one embodiment, the third magnet 113 is arranged in the same direction as the second magnet 112 and in the opposite direction to the first magnet 111. Alternatively, the north pole (N) of the first magnet 111 is positioned close to the first arc 101, and the south pole (S) is positioned away from the first arc 101. Similarly, the south pole (S) of the second magnet 112 and the third magnet 113 are positioned close to the first arc 101, and the north pole (N) is positioned away from the first arc 101. In this case, the first magnet 111 drives a portion of the first arc 101 to move towards the second sub-functional component 142, and the second magnet 112 and the third magnet 113 drive portions of the first arc 101 to move towards the first sub-functional component 141, causing the first arc 101 to... The shape is roughly "S". On the one hand, the first arc 101 is stretched by the magnetic force of the three magnets at the same time, which is conducive to the rapid cooling of the first arc 101. On the other hand, by making full use of the first sub-functional component 141 and the second sub-functional component 142 to cool the first arc 101, the area of ​​the arc extinguishing functional component 140 that can be used to cool the first arc 101 is increased, thereby improving the cooling effect and efficiency of the first arc 101. Furthermore, the first arc 101 is stretched to a greater extent at the two ends with higher temperatures due to the magnetic force of the three magnets at the same time, which is more conducive to improving the cooling efficiency of the first arc 101.

[0142] Please see Figure 22 , Figure 22 This is a schematic diagram of the switch 1 provided in the sixth embodiment of this application. The sixth embodiment of this application provides a power supply system. The difference from the third embodiment is that the first magnet assembly 110 further includes a third magnet 113. The third magnet 113 is located between the first magnet 111 and the second magnet 112. The third magnet 113 is arranged in the same direction as the first magnet 111. The third magnet 113 is used to drive part of the first arc 101 to move toward the first sub-functional component 141 to increase the movement path of the first arc 101. The third magnet 113 is used to increase the contact area between the first arc 101 and the first sub-functional component 141 to improve the cooling effect of the first sub-functional component 141 on the first arc 101. In this embodiment, the third magnet 113 is arranged in opposite directions to the second magnet 112 and in the same direction as the first magnet 111. That is, the south pole S of the first magnet 111 and the third magnet 113 are set close to the first electric arc 101 and the north pole N is set away from the first electric arc 101, and the north pole N of the second magnet 112 is set close to the first electric arc 101 and the south pole S is set away from the first electric arc 101.

[0143] By arranging the first magnet 111, the third magnet 113, and the second magnet 112, the shape of the first electric arc 101 is approximately "S" shaped. On the one hand, the first electric arc 101 is lengthened by the magnetic force of the three magnets simultaneously, which is more conducive to the rapid cooling of the first electric arc 101. On the other hand, by making full use of the first sub-functional component 141 and the second sub-functional component 142 to cool the first electric arc 101, the area of ​​the arc-extinguishing functional component 140 that can be used to cool the first electric arc 101 is increased, thereby improving the cooling effect and efficiency of the first electric arc 101. Furthermore, the first electric arc 101 is stretched to a greater extent at the two ends with higher temperatures due to the simultaneous magnetic force of the three magnets, which is more conducive to improving the cooling efficiency of the first electric arc 101.

[0144] In one embodiment, the third magnet 113 is located between the first magnet 111 and the second magnet 112. The third magnet 113 is arranged in opposite directions to the second magnet 112 and in the same direction as the first magnet 111. Alternatively, the north pole N of the first magnet 111 and the third magnet 113 are positioned close to the first electric arc 101, while the south pole S is positioned away from the first electric arc 101. The south pole S of the second magnet 112 is positioned close to the first electric arc 101, while the north pole N is positioned away from the first electric arc 101. In this case, the first magnet 111 and the third magnet 113 drive the first electric arc 101 to move towards the second sub-functional component 142, and the second magnet 112 drives the first electric arc 101 to move towards the first sub-functional component 142. The movement of 41 causes the first electric arc 101 to take on an approximate "S" shape. On the one hand, the first electric arc 101 is lengthened by the magnetic force of the three magnets, which is beneficial for the rapid cooling of the first electric arc 101. On the other hand, by making full use of the first sub-functional component 141 and the second sub-functional component 142 to cool the first electric arc 101, the area of ​​the arc extinguishing functional component 140 that can be used to cool the first electric arc 101 is increased, thereby improving the cooling effect and efficiency of the first electric arc 101. Furthermore, the first electric arc 101 is stretched to a greater extent at the two ends with higher temperatures due to the magnetic force of the three magnets, which is more conducive to improving the cooling efficiency of the first electric arc 101.

[0145] Please see Figure 23 and Figure 24 , Figure 23 This is a schematic diagram of switch 1 provided in the seventh embodiment of this application. Figure 24 This is a schematic diagram of the movement of the electric arc 100 under magnetic force in the seventh embodiment of this application. The difference from the first embodiment is that the first magnet assembly 110 includes four or more magnets (such as...). Figure 23As shown), the four or more magnets include a first magnet 111 and a second magnet 112. The four or more magnets are arranged in sequence, and the directions of the magnetic field lines of each magnet are sequentially different by a preset angle, so that the first electric arc 101 is approximately close to a square wave shape, thereby improving the cooling effect on the first electric arc 101. Figure 23 The square wave shape of the first electric arc 101 is only for illustration. By adjusting the number of magnets, the direction of the magnetic field lines of the magnets, or the preset angle difference between the magnetic field directions of adjacent magnets, the shape of the first electric arc 101 is controlled so that the first electric arc 101 adapts to the shape of the arc extinguishing functional component 140 and moves to the first sub-functional component 141 and the second sub-functional component 142 more quickly, thereby improving the cooling effect on the first electric arc 101.

[0146] Please see Figure 25 The eighth embodiment of this application provides a power supply system that differs from the first embodiment in that, in this embodiment, the second magnet assembly 150 is not the same as the first magnet assembly 110; the first magnet 111 and the second magnet 112 are arranged in the same direction; the fourth magnet 151 and the fifth magnet 152 are arranged in the same direction; and the first magnet 111 and the fourth magnet 151 are arranged in opposite directions (e.g., ...). Figure 25 As shown, the north pole N of the first magnet 111 and the second magnet 112 are both located close to the first electric arc 101 and the south pole S is located away from the first electric arc 101. The north pole N of the fourth magnet 151 and the fifth magnet 152 are located close to the second electric arc 102 and the south pole S is located away from the second electric arc 102.

[0147] In one embodiment, the first magnet 111 and the second magnet 112 in the first magnet assembly 110 are arranged in opposite directions, while the fourth magnet 151 and the fifth magnet 152 are arranged in the same direction.

[0148] In one embodiment, the first magnet 111 and the second magnet 112 in the first magnet assembly 110 are arranged in opposite directions, and the fourth magnet 151 and the fifth magnet 152 are arranged in opposite directions.

[0149] In one embodiment, the first magnet assembly 110 includes a first magnet 111 and a second magnet 112 arranged in the same direction, and the second magnet assembly 150 further includes a sixth magnet (not shown in the figure), and the fourth magnet 151, the fifth magnet 152 and the sixth magnet are arranged in the same direction.

[0150] In one embodiment, the number and arrangement direction of the magnets in the first magnet assembly 110 and the second magnet assembly 150 can be set as needed.

[0151] Please see Figure 26 and Figure 27 , Figure 26 This is a schematic diagram of switch 1 provided in the ninth embodiment of this application. Figure 27 for Figure 26The top view shows that the ninth embodiment of this application provides a power supply system, which differs from the eighth embodiment in that the arc extinguishing function 140 includes a first sub-function 141 and a second sub-function 142 disposed opposite to each other. The first magnet assembly 110 and the second magnet assembly 150 are located on the side of the first sub-function 141 away from the second sub-function 142, and the first magnet assembly 110 is disposed adjacent to the first stationary contact 121, and the second magnet assembly 150 is disposed adjacent to the second stationary contact 122, so as to reduce the size of the switching unit 10.

[0152] In one embodiment, the first magnet assembly 110 and the second magnet assembly 150 are fixed to the first sub-functional component 141. In another embodiment, the first magnet assembly 110 and the second magnet assembly 150 may also be located on the side of the second sub-functional component 142 away from the first sub-functional component 141 along the first direction X, with the first magnet assembly 110 disposed adjacent to the first stationary contact 121 and the second magnet assembly 150 disposed adjacent to the second stationary contact 122. In yet another embodiment, one of the first magnet assembly 110 and the second magnet assembly 150 is located on the side of the first sub-functional component 141 away from the second sub-functional component 142 along the first direction X, and the other of the first magnet assembly 110 and the second magnet assembly 150 is located on the side of the second sub-functional component 142 away from the first sub-functional component 141 along the first direction X. In one embodiment, the first magnet assembly 110 is located on the side of the first sub-functional component 141 away from the second sub-functional component 142, and the first magnet assembly 110 is disposed adjacent to the first stationary contact 121, and the second magnet assembly 150 is located on the side of the arc extinguishing functional component 140 close to the second stationary contact 122 along the second direction X.

[0153] In this embodiment, the magnetic field direction inside the magnet body of the first magnet assembly 110 and the second magnet assembly 150 is the same as the radial direction of the first sub-functional component 141, or in other words, the magnetic field direction inside the magnet body of the first magnet assembly 110 and the second magnet assembly 150 is coplanar with the first sub-functional component 141 or the second sub-functional component 142.

[0154] Please see Figure 28 , Figure 28 This is a schematic diagram of the switch 1 provided in the tenth embodiment of this application. In this embodiment, the difference from the ninth embodiment is that the magnetic field direction inside the magnet in the first magnet assembly 110 and the second magnet assembly 150 is perpendicular to the first sub-functional component 141 or the second sub-functional component 142.

[0155] Please see Figure 29 , Figure 29This is a side view of the switch 1 provided in the eleventh embodiment of this application. The tenth embodiment of this application provides a power supply system, which differs from the ninth embodiment in that the magnetic field direction inside the magnets in the first magnet assembly 110 and the second magnet assembly 150 is perpendicular to the surface of the first sub-functional component 141 and the second sub-functional component 142, or in other words, the magnetic field direction inside the magnets in the first magnet assembly 110 and the second magnet assembly 150 is perpendicular to the radial direction of the first sub-functional component 141. In this embodiment, the switch 1 includes multiple switch units 10. The first magnet assembly 110 and the second magnet assembly 150 are distributed between two adjacent switch units 10. Two switch units 10 share a set of first magnet assembly 110 and second magnet assembly 150, which can save magnets and reduce costs.

[0156] In some embodiments, the magnetic field directions of the magnets inside the first magnet assembly 110 and the second magnet assembly 150 may be opposite or the same, or the magnetic field directions of some magnets may be opposite and the magnetic field directions of some magnets may be the same. The specific configuration can be set as needed, and the number of magnets inside the first magnet assembly 110 and the second magnet assembly 150 can also be set as needed.

[0157] In some embodiments, the magnetic field directions of the magnets inside the first magnet assembly 110 and the second magnet assembly 150 may intersect, as needed.

[0158] It should be noted that each magnet in the first magnet assembly 110 and the second magnet assembly 150 of this application can be a permanent magnet or a soft magnet, and can be a magnet or a magnet doped with metal atoms such as cobalt or nickel, or other magnets that can generate a magnetic field and have magnetic field lines.

[0159] Please continue reading. Figure 3The tenth embodiment of this application provides a switch unit 10, which is applied in a switch 1. The switch 1 includes a knob 12, a switch unit 10, and an operating mechanism 11 connected between the knob 12 and the switch unit 10. The knob 12 can control the switch unit 10 to open or close through the operating mechanism 11. The switch unit 10 includes an arc-extinguishing component 140, a stationary contact assembly 120, a moving contact 130, and a first magnet assembly 110. The stationary contact assembly 120 is located inside the arc-extinguishing component 140. The moving contact 130 is located inside the arc-extinguishing component 140 and can move relative to the stationary contact assembly 120. When the switch unit 10 is in the closed state, the moving contact 130 is connected to the stationary contact assembly 120. When the switch unit 10 is in the open state, the moving contact 130 separates from the stationary contact assembly 120. During the separation process, an electric arc 100 is formed between the moving contact 130 and the stationary contact assembly 120. At least a portion of the magnetic field lines of the first magnet assembly 110 intersect with the current direction of the electric arc 100, thereby driving the electric arc 100 to move towards the arc-extinguishing functional component 140. The first magnet assembly 110 includes a first magnet 111 and a second magnet 112 spaced apart. The first magnet 111 and the second magnet 112 together increase the movement path of the electric arc 100 and increase the contact area between the electric arc 100 and the arc-extinguishing functional component 140, thereby improving the cooling effect of the arc-extinguishing functional component 140 on the electric arc 100. In this embodiment, the switch 1 can be manually rotated by the knob 12, and the knob 12 controls the switch unit 10 to open or close through the operating mechanism 11.

[0160] The descriptions and modifications of the arc-extinguishing component 140, stationary contact assembly 120, moving contact 130, and first magnet assembly 110 in the power supply system described in the foregoing embodiments are applicable to the arc-extinguishing component 140, stationary contact assembly 120, moving contact 130, and first magnet assembly 110 in the switching unit 10 of this embodiment. The descriptions and modifications of the positional relationship between the first magnet assembly 110 and the arc-extinguishing component 140 in the power supply system described in the foregoing embodiments are applicable to the positional relationship between the first magnet assembly 110 and the arc-extinguishing component 140 in the switching unit 10 of this embodiment. Further details will not be repeated here.

[0161] The power supply system and switching unit provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and embodiments of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A power supply system, characterized in that, The system includes a control unit, a switch, a DC power source, and a power conversion unit. The switch is electrically connected between the DC power source and the power conversion unit. The control unit is used to send a trip signal to the switch when the DC power source or the power conversion unit fails. The switch includes a switching unit and an operating mechanism. The operating mechanism is used to receive the trip signal and control the switching unit to open or close. The switching unit includes: Arc extinguishing functional components; A stationary contact assembly is located inside the arc-extinguishing functional component, and the stationary contact assembly includes a first stationary contact and a second stationary contact that are spaced apart. The moving contact is located inside the arc-extinguishing component and can move relative to the stationary contact assembly. When the operating mechanism receives the tripping signal, it controls the switching unit to open, so that the moving contact separates from the stationary contact assembly. During the separation of the moving contact and the stationary contact assembly, an electric arc is formed between them. The moving contact includes a first end and a second end that are arranged opposite to each other. The operating mechanism can control the moving contact to rotate. When the switching unit is in the closed state, the first end and the second end are respectively connected to the first stationary contact and the second stationary contact to conduct current. A first magnet assembly, wherein at least a portion of the magnetic field lines of the first magnet assembly intersect the direction of the current in the electric arc, thereby driving the electric arc toward the arc-extinguishing functional component. The first magnet assembly includes a first magnet and a second magnet spaced apart, the first magnet and the second magnet jointly serving to increase the movement path of the electric arc and the contact area between the electric arc and the arc-extinguishing functional component, thereby improving the cooling effect of the arc-extinguishing functional component on the electric arc. When the switching unit is in the open state, the moving contact rotates to separate the first end from the first stationary contact and the second end from the second stationary contact to cut off the current and form a first electric arc between the first end and the first stationary contact. The first magnet and the second magnet are located on the same side of the arc-extinguishing functional element along the radial direction of the arc-extinguishing functional element. The first magnet and the second magnet are arranged at intervals along the radial or circumferential direction of the arc-extinguishing functional element. The magnetic ends of the first magnet and the magnetic ends of the second magnet are arranged close to the first electric arc. The first magnet and the second magnet are located on one side of the first electric arc. The first magnet and the second magnet are used together to increase the movement path of the first electric arc and increase the contact area between the first electric arc and the arc-extinguishing functional element.

2. The power supply system according to claim 1, characterized in that, The first magnet and the second magnet are arranged in the same direction to drive the first electric arc to move toward the same side of the arc extinguishing component, thereby increasing the movement path of the first electric arc and increasing the contact area between the first electric arc and the arc extinguishing component.

3. The power supply system according to claim 2, characterized in that, The first magnet assembly further includes a third magnet. The first magnet, the second magnet, and the third magnet are all arranged in the same direction to drive the first electric arc to move toward the same side of the arc extinguishing component, thereby increasing the movement path of the first electric arc and increasing the contact area between the first electric arc and the arc extinguishing component.

4. The power supply system according to claim 1, characterized in that, The arc-extinguishing functional component includes a first sub-functional component and a second sub-functional component arranged opposite to each other. The first magnet and the second magnet are arranged in opposite directions. The first magnet is used to drive a portion of the first arc to move toward the first sub-functional component, and the second magnet is used to drive a portion of the first arc to move toward the second sub-functional component, thereby increasing the movement path of the first arc. The first magnet is used to increase the contact area between the first arc and the first sub-functional component, and the second magnet is used to increase the contact area between the first arc and the second sub-functional component, so that both the first sub-functional component and the second sub-functional component are used to cool the first arc.

5. The power supply system according to claim 4, characterized in that, The first magnet assembly further includes a third magnet. The first magnet, the second magnet, and the third magnet are arranged in sequence, with the third magnet arranged in the opposite direction to the second magnet. The third magnet is used to drive a portion of the first arc to move toward the first sub-functional component, thereby increasing the movement path of the first arc. The third magnet is also used to increase the contact area between the first arc and the first sub-functional component, thereby improving the cooling effect of the first sub-functional component on the first arc.

6. The power supply system according to claim 4, characterized in that, The first magnet assembly further includes a third magnet. The first magnet, the second magnet, and the third magnet are arranged in sequence. The second magnet and the third magnet are arranged in the same direction. The third magnet is used to drive a portion of the first arc to move toward the second sub-functional component to increase the movement path of the first arc. The third magnet is used to increase the contact area between the first arc and the second sub-functional component to improve the cooling effect of the second sub-functional component on the first arc.

7. The power supply system according to claim 4, characterized in that, The first magnet assembly further includes a third magnet located between the first magnet and the second magnet. The third magnet is arranged in the same direction as the first magnet. The third magnet is used to drive a portion of the first arc toward the first sub-functional component to increase the movement path of the first arc. The third magnet is used to increase the contact area between the first arc and the first sub-functional component to improve the cooling effect of the first sub-functional component on the first arc.

8. The power supply system according to claim 1, characterized in that, The extension direction of the first magnet intersects the extension direction of the second magnet, which makes the driving force of the first magnet assembly on the first electric arc greater and can reduce the size of the switch.

9. The power supply system according to claim 1, characterized in that, The extension direction of the first magnet is the same as that of the second magnet, and the magnetic field lines inside the first magnet intersect with the magnetic field lines inside the second magnet, so that the first electric arc is close to the arc extinguishing function.

10. The power supply system according to claim 1, characterized in that, The first magnet assembly includes four or more magnets, including the first magnet and the second magnet. The four or more magnets are arranged in sequence, and the directions of the magnetic field lines of each magnet are sequentially different by a preset angle to improve the cooling effect on the first electric arc.

11. The power supply system according to any one of claims 1-10, characterized in that, The switching unit further includes a second magnet assembly, and when the switching unit is in the open state, a second electric arc is formed between the second end and the second stationary contact; The first magnet and the second magnet are located on the side of the first arc away from the second arc, and at least a portion of the magnetic field lines of the second magnet assembly intersect the current direction of the second arc to drive the second arc to move. The second magnet assembly further includes a fourth magnet and a fifth magnet spaced apart. The fourth magnet and the fifth magnet are located on the side of the second arc away from the first arc. The fourth magnet and the fifth magnet are used together to increase the movement path of the second arc and increase the contact area between the second arc and the arc extinguishing functional component, so as to cool the second arc, improve the cooling effect on the second arc, and thus improve the disconnection capability of the switching unit.

12. The power supply system according to claim 11, characterized in that, The first magnet assembly and the second magnet assembly are located on both sides of the arc-extinguishing functional component along the radial direction of the arc-extinguishing functional component, and the first magnet assembly is disposed adjacent to the first stationary contact to improve the cooling effect on the first arc; the second magnet assembly is disposed adjacent to the second stationary contact to improve the cooling effect on the second arc.

13. The power supply system according to claim 11, characterized in that, The arc-extinguishing function includes a first sub-function and a second sub-function disposed opposite to each other. The first magnet assembly and the second magnet assembly are located on the side of the first sub-function away from the second sub-function, and the first magnet assembly is disposed adjacent to the first stationary contact, and the second magnet assembly is disposed adjacent to the second stationary contact, so as to reduce the size of the switching unit.

14. The power supply system according to any one of claims 1-10 and 12-13, characterized in that, The arc-extinguishing functional component includes at least one of an insulating shell or a metal grid assembly.

15. A switching unit, characterized in that, The switching unit is used in a switch, which includes a knob, the switching unit, and an operating mechanism connected between the knob and the switching unit. The knob can control the switching unit to open or close via the operating mechanism. The switching unit includes: Arc extinguishing functional components; A stationary contact assembly is located inside the arc-extinguishing functional component, and the stationary contact assembly includes a first stationary contact and a second stationary contact that are spaced apart. The moving contact is located inside the arc-extinguishing component and can move relative to the stationary contact assembly. When the switch unit is in the closed state, the moving contact is connected to the stationary contact assembly and conducts electricity. When the switch unit is in the open state, the moving contact is separated from the stationary contact assembly. During the separation process, an electric arc is formed between the moving contact and the stationary contact assembly. The moving contact includes a first end and a second end that are disposed opposite to each other. The operating mechanism can control the rotation of the moving contact. When the switch unit is in the closed state, the first end and the second end are respectively connected to the first stationary contact and the second stationary contact to conduct current. A first magnet assembly, wherein at least a portion of the magnetic field lines of the first magnet assembly intersect the direction of the current in the electric arc, thereby driving the electric arc toward the arc-extinguishing functional component. The first magnet assembly includes a first magnet and a second magnet spaced apart, the first magnet and the second magnet jointly serving to increase the movement path of the electric arc and the contact area between the electric arc and the arc-extinguishing functional component, thereby improving the cooling effect of the arc-extinguishing functional component on the electric arc. When the switching unit is in the open state, the moving contact rotates to separate the first end from the first stationary contact and the second end from the second stationary contact to cut off the current and form a first electric arc between the first end and the first stationary contact. The first magnet and the second magnet are located on the same side of the arc-extinguishing functional element along the radial direction of the arc-extinguishing functional element. The first magnet and the second magnet are arranged at intervals along the radial or circumferential direction of the arc-extinguishing functional element. The magnetic ends of the first magnet and the magnetic ends of the second magnet are arranged close to the first electric arc. The first magnet and the second magnet are located on one side of the first electric arc. The first magnet and the second magnet are used together to increase the movement path of the first electric arc and increase the contact area between the first electric arc and the arc-extinguishing functional element.

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