Circuit breaker and equipment cabinet

Abstract

The embodiment of the invention provides a circuit breaker and an equipment cabinet comprising the circuit breaker, relates to the technical field of electrical equipment, and is used for solving the problem that the breaking speed of the circuit breaker is relatively low. The circuit breaker comprises a shell, a first static contact and a second static contact, and the first static contact and the second static contact are at least partially located in the shell. The circuit breaker further comprises a motor and a moving contact, the motor comprises a stator and a mover, the stator is located outside the shell and fixedly connected with the shell, the mover is located outside the shell and movably connected with the stator, the stator is used for driving the mover, the mover is fixedly connected with the moving contact located in the shell, and the mover is static relative to the moving contact. The circuit breaker has a switch-on state and a switch-off state, in the switch-on state, the moving contact is in contact with the first static contact and the second static contact, and in the switch-off state, the rotor drives the moving contact to be separated from at least one of the first static contact and the second static contact.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a circuit breaker and equipment cabinet. Background Technology

[0002] In scenarios such as data center power systems, multiple loads may draw power from the same bus. When a short circuit occurs on the line where some loads are located, the circuit breaker can disconnect the short circuit fault, ensuring the stability of the bus voltage and meeting the requirements of system power supply continuity.

[0003] In related technologies, circuit breakers rely on spring mechanisms to store energy, which is released when a short-circuit fault occurs, driving the moving contact to trip and disconnect the circuit. However, solutions using these technologies have relatively slow breaking speeds, which cannot meet the needs of some scenarios. Furthermore, the slow breaking speed results in poor current-limiting capacity, potentially leading to arcing and fault propagation. Summary of the Invention

[0004] This application provides a circuit breaker and an equipment cabinet including the circuit breaker to solve the problem of slow circuit breaker breaking speed.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A first aspect of this application provides a circuit breaker comprising a housing, a first stationary contact, and a second stationary contact, both of which are at least partially located within the housing. The circuit breaker further comprises a motor and a moving contact. The motor includes a stator and a mover. The stator is located outside the housing and fixedly connected to the housing, while the mover is located outside the housing and movably connected to the stator. The stator drives the mover, which is fixedly connected to the moving contact located within the housing, and the mover is stationary relative to the moving contact. The circuit breaker has a closed state and an open state. In the closed state, the moving contact contacts the first and second stationary contacts. In the open state, the mover drives the moving contact to disengage from at least one of the first or second stationary contacts.

[0007] When the circuit breaker is in a normal operating state, it is closed, and the moving contact simultaneously contacts the first and second stationary contacts, allowing current to flow normally. When a short circuit occurs in the circuit breaker's operating state, the motor stator drives (or propels) the mover, which in turn moves the moving contact, causing it to disengage from either the first or second stationary contact, or simultaneously separate from both. At this point, the circuit breaker is in an open operating state, breaking the current. Because the mover and moving contact are fixed (rigidly connected), there is no transmission structure such as a spring or connecting rod between them, keeping them relatively stationary. This allows the motor to synchronously drive the moving contact as it rotates, increasing the breaking speed and shortening the breaking time. This better limits the rise of short-circuit current, reduces the possibility of arc propagation during breaking, achieves low-energy breaking, and reduces the likelihood of fault occurrence and propagation.

[0008] In one optional embodiment, the motor is a rotary motor, the stator is used to drive the mover to rotate, the motor also includes an output shaft, the output shaft is fixedly connected to the mover, the output shaft extends from one side of the stator, the housing is located on the side of the stator where the output shaft extends, the output shaft is fixedly connected to the moving contact, and the moving contact is rotatably connected to the housing.

[0009] The rotating motor can provide a large torque. The torque is transmitted to the moving contact by rigidly connecting the moving contact and the moving element through the output shaft, which increases the breaking speed of the moving contact and can limit the short-circuit current more quickly.

[0010] In one optional embodiment, the stator includes a stator base and a first magnetic core, and the mover includes a mover base and a first permanent magnet that are fixedly connected. The stator base and the mover base are distributed along the rotation axis of the mover base. The first magnetic core is fixed to the wall of the stator base facing the mover base. The two poles of the first permanent magnet are distributed along the rotation axis of the mover base. The first permanent magnet is located on different sides of the first magnetic core in the rotation direction of the mover base in the open and closed states, respectively.

[0011] When the mover rotates, the mover base drives the first permanent magnet to rotate from the side facing the first magnetic core to the other side. For example, when the motor is under current, the first magnetic core attracts the first permanent magnet (in the closed state) on one side, causing it to rotate clockwise towards the other side of the first magnetic core. At this time, under the attraction of the first magnetic core, the first permanent magnet rotates at a relatively fast speed. When the first permanent magnet rotates to the other side of the first magnetic core, the first magnetic core continues to attract the first permanent magnet, and its rotational speed in the clockwise direction decreases until it gradually comes to a stop. Since the first permanent magnet is fixed to the mover base, the change in the rotational speed of the first permanent magnet is also the change in the rotational speed of the entire mover. In this way, the mover accelerates first and then decelerates during rotation, reducing the possibility of the mover hitting the housing during rotation and also reducing the risk of excessive rotation. In addition, making the motor rotate in a pendulum manner simplifies the control circuit.

[0012] In one optional embodiment, the stator further includes a second magnetic core, which is fixed to the side of the stator base facing the mover base. There is a gap between the first magnetic core and the second magnetic core. When current is applied, the end of the first permanent magnet near the stator base has the opposite polarity to the end of the first magnetic core near the mover base, and the end of the first magnetic core near the mover base has the opposite polarity to the end of the second magnetic core near the mover base. In the open state, the first permanent magnet is directly opposite to the gap between the first and second magnetic cores.

[0013] In the closed state, the first permanent magnet is located on the side of the first magnetic core away from the second magnetic core. When the motor is running, the first magnetic core attracts the first permanent magnet, causing it to move towards the second magnetic core. However, when the first permanent magnet rotates between the first and second magnetic cores, the first magnetic core attracts it, while the second magnetic core repels it, causing the rotational speed of the first permanent magnet to decrease until it stops. After the motor is turned off, the first permanent magnet stops moving. At this point, the first permanent magnet is directly opposite the gap between the first and second permanent magnets, and the circuit breaker completes the disconnection.

[0014] In one optional embodiment, the circuit breaker further includes a linkage assembly and a spring. The linkage assembly includes a first link, a second link, and a third link. The first and second links are both rotatably connected to the housing. The rotation axis of the first link relative to the housing is parallel to the rotation axis of the second link relative to the housing. One end of the third link is rotatably connected to the first link, and the other end is rotatably connected to the second link. The positions where the housing is rotatably connected to the first link and the positions where it is rotatably connected to the second link are located on the same side of the length direction of the third link, and the length direction of the first link is parallel to the length direction of the second link. The rotation axis of the second link relative to the housing coincides with the rotation axis of the moving contact relative to the housing. The second link is rotatably connected to the moving contact, and the position where the moving contact is rotatably connected to the second link is located to the side of the position where the moving contact is rotatably connected to the housing. Any one of the first, second, and third links is connected to one end of the spring, and the other end of the spring is connected to the housing. In the closed state, the spring is used to drive the moving contact to press against the first stationary contact through the linkage assembly.

[0015] The first and second links are parallel to the rotation axis of the housing, and both are rotatably connected to the third link. Furthermore, the first and second links are located on the same side of the length of the third link. Thus, the first, second, and third links, along with the housing, form a structure similar to a "four-bar linkage," where one of the first, second, or third links can drive the other two. The second link is rotatably connected to the moving contact, and their rotation axes relative to the housing coincide. When any of the first, second, or third links rotates, the moving contact also rotates, achieving linkage between the link assembly and the moving contact. In the closed state, the spring drives any of the three links to rotate through tension (tension spring / pull spring) or thrust (compression spring / pressure spring), causing the moving contact to press against the first stationary contact, thus fulfilling the overtravel requirement of the moving contact. In other words, under the action of the spring, the moving contact applies a force to the first stationary contact, which reduces the possibility of the moving contact separating from the first stationary contact when the circuit is closed, reduces the impact of the circuit breaker on the normal operation of the system, and reduces the possibility of line faults.

[0016] In one optional embodiment, the position where the moving contact contacts the first stationary contact is the first contact point. There is a first time period between the closed state and the open state. During the first time period, the spring drives the first contact point to move away from the first stationary contact.

[0017] During the first time interval between the closed and open states of the circuit breaker, the spring applies force to the moving contact, causing the first contact to move away from the first stationary contact. Driven by the spring, the moving contact will not reverse and cause the first contact to re-engage with the first stationary contact, reducing the possibility of circuit breaker failure and enabling the circuit breaker to perform its breaking function more stably.

[0018] In one optional embodiment, the linkage assembly further includes a rotating shaft, the first linkage and the third linkage are rotatably connected via the rotating shaft, one end of the spring is connected to the rotating shaft, and the other end is connected to the housing.

[0019] The rotating shaft serves two purposes: it enables the rotational connection between the first and third links and also provides a connection point for the spring, facilitating its installation. When the spring's force is transmitted to the rotating shaft, it simultaneously drives both the first and third links, and through the third link, it rotates the moving contact, thus fulfilling the overtravel requirement of the moving contact.

[0020] In one optional embodiment, the moving contact is rotatably connected to the second link at a position on the side of the moving contact rotatably connected to the housing facing the first stationary contact. The spring is a tension spring, and the position of the housing connected to the spring and the position of the housing rotatably connected to the first link are on the same side of the length direction of the third link. In the closed state, the angle between the length direction of the spring and the length direction of the third link is smaller than the angle between the length direction of the first link and the length direction of the third link. The moving contact contacts the side of the first stationary contact facing the rotation axis.

[0021] In the closed state, because the angle between the length direction of the spring and the length direction of the third link is smaller than the angle between the length direction of the first link and the length direction of the third link, under the tension of the spring, the position where the moving contact contacts the first stationary contact will move towards the first stationary contact. Furthermore, the position where the moving contact contacts the first stationary contact is located on the side of the first stationary contact facing the rotation axis. In this way, the spring can drive the link assembly to press the moving contact tightly against the first stationary contact, achieving a tight fit between the moving contact and the first stationary contact in the closed state and reducing the possibility of separation between the two.

[0022] In one optional implementation, in the open state, the angle between the length direction of the spring and the length direction of the third link is greater than the angle between the length directions of the first link and the third link.

[0023] In the open state, the angle between the length direction of the spring and the length direction of the third link is greater than the angle between the length direction of the third link and the length direction of the first link. In other words, the spring pulls the contact in the opposite direction, causing the position of the moving contact that contacts the first stationary contact to tend to move away from the first stationary contact. At this time, the moving contact will not reverse and contact the first stationary contact again. The circuit breaker remains in the open state, so that the circuit breaker's opening function can be stably realized, reducing the possibility of fault propagation.

[0024] In one optional embodiment, the linkage assembly further includes a fourth link, a fifth link, and a sixth link. All three links are located on the side of the moving contact away from the third link. The fourth and fifth links are rotatably connected to the housing. The rotation axis of the fourth link relative to the housing coincides with the rotation axis of the first link relative to the housing. The rotation axis of the fifth link relative to the housing coincides with the rotation axis of the second link relative to the housing. One end of the sixth link is rotatably connected to the fourth link via a rotating shaft, and the other end is rotatably connected to the fifth link. The positions where the housing rotatably connects to the fourth link and the fifth link are located on the same side of the length direction of the sixth link. The length direction of the fourth link is parallel to the length direction of the fifth link. The fifth link is rotatably connected to the moving contact, and the rotation axis of the fifth link relative to the moving contact coincides with the rotation axis of the second link relative to the moving contact.

[0025] The fourth, fifth, and sixth links, along with the housing, form a structure similar to a "four-bar linkage." The linkage assembly can be understood as a combination of two sets of "four-bar linkages," with one set on each side of the moving contact and them interconnected, resulting in smoother movement of the linkage assembly. Furthermore, the rotating shaft simultaneously enables the rotational connection of multiple links, further simplifying the structure and reducing production costs.

[0026] In one optional embodiment, the circuit breaker includes a first pin, which is fixedly connected to an output shaft. The first pin passes through a moving contact, a second connecting rod, and a third connecting rod. The third connecting rod and the moving contact are rotatably connected to the second connecting rod via the first pin. The housing is provided with at least one first arc-shaped groove through which the first pin passes, and the first pin slides in fit with each first arc-shaped groove.

[0027] When the motor needs to drive the moving contact to rotate, the output shaft drives the first pin to rotate. The first arc-shaped groove allows the first pin to move normally, and the first pin moves the moving contact and the connecting rod assembly. The motor drives the moving contact through the first pin, and the rotation between the moving contact, the second connecting rod, and the third connecting rod is also achieved through the first pin, which simplifies the structure of the circuit breaker and facilitates production and maintenance.

[0028] In one optional embodiment, the housing includes a protective shell and a first side plate. The movable contact is located inside the protective shell and rotatably connected to the protective shell. The first side plate is located outside the protective shell and is distributed along the rotation axis of the movable contact relative to the protective shell. The first side plate is fixedly connected to the protective shell and there is a gap between them. One of the first connecting rod and the third connecting rod is disposed in the gap between the first side plate and the protective shell, and the other is disposed on the side of the first side plate away from the protective shell. The second connecting rod is located on the same side of the first side plate as the first connecting rod.

[0029] The first and second links are located on the same side of the first side plate, but the third link, which rotatably connects the first and second links, is located on the other side of the first side plate. This design allows for a gap between the first and third links while they are rotatably connected, preventing them from rubbing against each other or interfering. Similarly, the second and third links also avoid rubbing against each other or interfering, allowing the link assembly to rotate stably.

[0030] In one optional embodiment, the housing has a first stop surface, which is disposed facing the first stationary contact. The position where the moving contact contacts the first stationary contact is the first contact point. There is a space between the first stop surface and the first stationary contact for the first contact point to move. The first stop surface is used to stop the moving contact.

[0031] When the moving contact separates from the first stationary contact, the first contact point moves away from the first stationary contact, that is, moves towards the first stop surface. However, the first contact point can only rotate between the first stop surface and the first stationary contact. The first stop surface acts to stop the moving contact, reducing the possibility of excessive rotation of the moving contact.

[0032] In one alternative implementation, the motor is a linear motor, and the stator is used to drive the mover to slide.

[0033] When the motor is a linear motor, the stator drives the mover to move in a straight line, and the mover also carries the moving contact to move in a straight line, thereby realizing the switching of the circuit breaker between the open and closed states.

[0034] In one optional embodiment, the stator includes a stator base and a first magnetic core, and the mover includes a mover base and a first permanent magnet that are fixedly connected. The mover base is slidably connected to the stator base, and the distribution direction of the stator base and the mover base is perpendicular to the sliding direction of the mover base. The first magnetic core is fixed to the wall surface of the stator base facing the mover base, and the first permanent magnet is located on the side of the moving contact away from the first stationary contact. The first magnetic core is at least partially located on the side of the first permanent magnet facing the first stationary contact.

[0035] When the circuit breaker is in the closed state, since the first magnetic core is at least partially located on the side of the first permanent magnet close to the first stationary contact, the portion of the first magnetic core located on the side of the first permanent magnet close to the first stationary contact attracts the first permanent magnet to move towards the first stationary contact. The first permanent magnet moves the moving base, and the moving base moves the moving contact, causing the moving contact to press against the first and second stationary contacts, thus achieving the overtravel requirement of the moving contact and reducing the possibility of the moving contact disengaging from the first and second stationary contacts.

[0036] In one alternative implementation, when current is applied, the end of the first magnetic core facing the moving base has the same polarity as the end of the first permanent magnet facing the stator base.

[0037] When it is necessary to separate the moving contact from the first stationary contact, current is applied to the motor. The polarities of the ends of the first magnetic core and the first permanent magnet that are close to each other are opposite. The first magnetic core pushes the first permanent magnet toward the side away from the first stationary contact, which means that the moving element moves away from the first stationary contact. The moving element carries the moving contact away from the first stationary contact, thus realizing the opening of the circuit breaker.

[0038] In one optional embodiment, the mover further includes a second permanent magnet. In the closed state, the second permanent magnet is located on the side of the first magnetic core facing the first stationary contact. The orthographic projection of the first magnetic core on the stator base partially overlaps with the orthographic projection of the first permanent magnet on the stator base. The polarity of the end of the first permanent magnet facing the stator base is opposite to that of the end of the second permanent magnet facing the stator base.

[0039] The second permanent magnet assists the first permanent magnet in driving the movement of the mover base. The projections of the first permanent magnet and the first magnetic core onto the stator base overlap, while the second permanent magnet does not overlap with the first magnetic core (there is a gap between them). This can be understood as the second permanent magnet being farther from the first magnetic core. Therefore, when no power is applied, the first magnetic core attracts the first permanent magnet but not the second, allowing the mover to move towards the first stationary contact under the attraction until the moving contact presses against the first stationary contact. When power is applied, the first magnetic core becomes more magnetic, acting simultaneously on both the first and second permanent magnets. For example, it first pushes the first permanent magnet a certain distance, then attracts the second permanent magnet a certain distance, causing the moving contact to separate from the first stationary contact. Furthermore, the longer movement distance of the mover reduces the possibility of arcing.

[0040] In one alternative embodiment, the circuit breaker further includes a circuit board and at least one capacitor, the at least one capacitor being disposed on the circuit board, the motor being electrically connected to the at least one capacitor, and the at least one capacitor being used for electrically connecting to a power source.

[0041] The addition of capacitors makes it easier to drive the motor, enabling it to react and rotate quickly, thus increasing the circuit breaker's tripping speed and shortening the tripping time.

[0042] In one optional embodiment, the circuit breaker further includes a current transformer located outside the housing, the current transformer being disposed on the first stationary contact or the second stationary contact, and the current transformer being electrically connected to the motor.

[0043] The current transformer is installed on the first stationary contact or the second stationary contact. The first stationary contact or the second stationary contact can be understood as the primary side of the current transformer. The winding in this application can be understood as the secondary side of the current transformer. When a short circuit occurs on the primary side, it is coupled to the secondary side through the magnetic core of the current transformer, and then fed back to the control circuit in a timely manner through the winding of the secondary side to control the motor operation. The motor drives the moving contact to move, thereby realizing the rapid tripping of the circuit breaker.

[0044] A second aspect of this application provides an equipment cabinet, which includes a cabinet body, a plurality of copper busbars and at least one of the aforementioned circuit breakers. The plurality of copper busbars are disposed within the cabinet body, and each first stationary contact and each second stationary contact are respectively connected to a corresponding copper busbar.

[0045] The first and second stationary contacts of the circuit breaker are fixedly connected to their respective copper busbars, realizing the electrical connection between the circuit breaker and the corresponding lines in the equipment cabinet. When a short circuit occurs, the circuit breaker can quickly disconnect the short-circuit circuit, better limiting the rise of the short-circuit current, reducing the possibility of arc propagation during disconnection, achieving low-energy disconnection, and also reducing the possibility of fault occurrence. Furthermore, the equipment cabinet provided in this application includes the aforementioned circuit breaker; therefore, the equipment cabinet provided in this application and the circuit breaker of the above-mentioned technical solution can solve the same technical problem and have the same technical effect, which will not be elaborated further here.

[0046] In one optional embodiment, multiple circuit breakers are provided, and the housings of the multiple circuit breakers are spaced apart along the direction of the rotation axis of the moving contact.

[0047] In one optional embodiment, multiple circuit breakers are provided, and the housings of the multiple circuit breakers are spaced apart along a direction perpendicular to the rotation axis of the moving contact.

[0048] In one optional embodiment, multiple circuit breakers are provided, and the housings of the multiple circuit breakers include a first housing, a second housing, and a third housing. The first housing and the second housing are spaced apart along the direction of the rotation axis of the moving contact, and the third housing is located to the side of the first housing and the second housing, and the third housing is directly opposite the gap between the first housing and the second housing.

[0049] In one optional embodiment, multiple circuit breakers are provided, each circuit breaker including a capacitor electrically connected to the motor, the multiple capacitors being distributed along the direction of the moving contact rotation axis, or the multiple capacitors being distributed along a direction perpendicular to the moving contact rotation axis, and the housings of the multiple circuit breakers being located on one side of the multiple capacitors along the distribution direction.

[0050] In one alternative implementation, multiple circuit breakers are provided, one of which includes a capacitor that is electrically connected to the motors of the multiple circuit breakers. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the overall structure of an equipment cabinet provided in an embodiment of this application;

[0052] Figure 2 This application provides a schematic diagram illustrating the operating principle of a circuit breaker.

[0053] Figure 3 A type II dynamic output performance curve is provided for embodiments of this application;

[0054] Figure 4 This is a schematic diagram of the overall structure of a circuit breaker provided in an embodiment of this application;

[0055] Figure 5 This is a schematic diagram of the structure of an output shaft provided in an embodiment of this application;

[0056] Figure 6 This is a schematic diagram of the structure of a moving contact provided in an embodiment of this application;

[0057] Figure 7 A schematic diagram showing a moving contact in a closed state, provided as an embodiment of this application;

[0058] Figure 8 A schematic diagram of a moving contact in an open state provided in an embodiment of this application;

[0059] Figure 9 A diagram illustrating the rotation process of a moving contact provided in an embodiment of this application;

[0060] Figure 10 This is a partial structural diagram of another circuit breaker provided in an embodiment of this application;

[0061] Figure 11 A schematic diagram of the stator and mover provided in an embodiment of this application;

[0062] Figure 12 A motion process diagram of a mover provided in an embodiment of this application;

[0063] Figure 13 A schematic diagram of the structure of a spring provided in an embodiment of this application;

[0064] Figure 14 A schematic diagram of the structure of a first link, a second link, and a third link provided in an embodiment of this application;

[0065] Figure 15 This is a schematic diagram of the structure of a rotating shaft provided in an embodiment of this application;

[0066] Figure 16 A schematic diagram showing the length direction of a first link, a third link, and a spring provided in an embodiment of this application;

[0067] Figure 17 A mechanical schematic diagram of a linkage assembly provided in an embodiment of this application;

[0068] Figure 18 This is a schematic diagram of the structure of a fourth link provided in an embodiment of this application;

[0069] Figure 19This is a schematic diagram of a linkage assembly provided in an embodiment of this application;

[0070] Figure 20 A schematic diagram of the structure of a shell provided in an embodiment of this application;

[0071] Figure 21 This is a schematic diagram of the structure of a third arc-shaped groove provided in an embodiment of this application;

[0072] Figure 22 A mechanical schematic diagram of another linkage assembly provided in an embodiment of this application;

[0073] Figure 23 A mechanical schematic diagram of another linkage assembly provided in an embodiment of this application;

[0074] Figure 24 This is a schematic diagram of the overall structure of another circuit breaker provided in an embodiment of this application;

[0075] Figure 25 A schematic diagram of the overall structure of another circuit breaker provided in this application embodiment;

[0076] Figure 26 A schematic diagram of a first arrangement of multiple circuit breakers provided in an embodiment of this application;

[0077] Figure 27 This is a schematic diagram of a second arrangement of multiple circuit breakers provided in an embodiment of this application;

[0078] Figure 28 This is a schematic diagram of a third arrangement of multiple circuit breakers provided in an embodiment of this application;

[0079] Figure 29 This is a schematic diagram of a fourth arrangement of multiple circuit breakers provided in the embodiments of this application;

[0080] Figure 30 This is a schematic diagram of a fifth arrangement of multiple circuit breakers provided in the embodiments of this application;

[0081] Figure 31 This is a schematic diagram of a sixth arrangement of multiple circuit breakers provided in the embodiments of this application;

[0082] Figure 32 A partial structural schematic diagram of another circuit breaker provided in this application embodiment;

[0083] Figure 33 A schematic diagram showing another moving contact in a closed state, provided in an embodiment of this application;

[0084] Figure 34 A schematic diagram showing another moving contact in the open state provided in an embodiment of this application;

[0085] Figure 35 This is a partial structural schematic diagram of another circuit breaker provided in an embodiment of this application.

[0086] Figure label:

[0087] 100 - Equipment cabinet; 110 - Cabinet body; 120 - Copper busbar; 130 - Circuit breaker;

[0088] 1-Shell; 11-First stop surface; 12-Second stop surface; 13-Protective shell; 14-First side plate; 15-Second side plate; 16-First arc groove; 17-Second arc groove; 18-Third arc groove; 19-Shell assembly; 191-First shell; 192-Second shell; 193-Third shell;

[0089] 2-First stationary contact;

[0090] 3-Second stationary contact; 31-Contact bar;

[0091] 4-Motor; 41-Stator; 411-Stator base; 4111-First stator base; 4112-Second stator base; 412-First magnetic core; 413-Second magnetic core; 414-Third magnetic core; 415-Fourth magnetic core; 42-Motor; 421-Motor base; 422-First permanent magnet; 423-Second permanent magnet; 43-Output shaft; 44-Coil; 45-Slide; 451-Groove;

[0092] 5-Moving contact; 51-First contact; 52-Second contact; 53-Wire;

[0093] 6-First pin;

[0094] 7-Second pin;

[0095] 8-Arc extinguishing assembly; 81-Arc extinguishing grid;

[0096] 9-Link assembly; 91-First link; 92-Second link; 93-Third link; 94-Fourth link; 95-Fifth link; 96-Sixth link; 97-Rotation shaft;

[0097] 10-Spring;

[0098] 101 - Circuit board; 102 - Capacitor; 1021 - Capacitor bank; 103 - Current transformer. Detailed Implementation

[0099] 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.

[0100] In this application, unless otherwise expressly specified and limited, the terms "upper", "lower", "front", "back", "left", "right", etc., indicating orientation or positional relationship may be defined relative to the orientation of the components schematically placed in the accompanying drawings. These directional terms may be relative concepts, used for relative description and clarification, and may change accordingly depending on the orientation of the components in the accompanying drawings. They should not be construed as limitations on this application.

[0101] In this application, the terms "first," "second," etc., are used for descriptive purposes only to distinguish one element from another, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0102] In this application, unless otherwise expressly stated and limited, "multiple" means two or more.

[0103] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines or channels, the terms "connection" and "linkage" as used in this application have the meaning of establishing electrical conductivity. The specific meaning needs to be understood in conjunction with the context.

[0104] Furthermore, in this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0105] In the accompanying drawings of the embodiments of this application, solid structures such as parts and components are represented by guide lines; hollow structures such as openings, holes, spaces, and cavities are represented by guide lines with arrows.

[0106] This application embodiment provides an equipment cabinet 100, Figure 1 An exemplary structure of an equipment cabinet 100 is shown, wherein the equipment cabinet 100 may be an uninterruptible power supply (UPS) equipment cabinet, or any suitable cabinet or box structure such as a switch cabinet or power distribution cabinet.

[0107] Reference Figure 1 The equipment cabinet 100 includes a cabinet body 110, multiple copper busbars 120, and at least one circuit breaker 130. The cabinet body 110 can be any suitable cabinet or box-type structure to protect the internal components, and this application does not impose any specific limitations on it. The copper busbars 120 (or copper wire busbars) can be used as power supply and distribution conductors. Multiple copper busbars 120 are arranged inside the cabinet body 110, and each circuit breaker 130 can be installed on a corresponding copper busbar 120. For example, each circuit breaker 130 is installed between two corresponding copper busbars 120 and fixed to the corresponding copper busbar 120.

[0108] Reference Figure 1 The circuit breaker 130 includes a housing 1, a first stationary contact 2, and a second stationary contact 3. Both the first stationary contact 2 and the second stationary contact 3 are at least partially located within the housing 1. That is, in one example, a portion of the first stationary contact 2 is located inside the housing 1, and the other portion extends outside the housing 1. Similarly, a portion of the second stationary contact 3 is located inside the housing 1, and the other portion extends outside the housing 1. Each first stationary contact 2 and each second stationary contact 3 is fixedly connected to a corresponding copper busbar 120. For example, one first stationary contact 2 and one second stationary contact 3 are each connected to one copper busbar 120.

[0109] In other examples, the first stationary contact 2 and the second stationary contact 3 are both located inside the housing 1. The first stationary contact 2 and the second stationary contact 3 extend out of the housing 1 through a structure that can conduct current and are connected to the corresponding copper busbar 120.

[0110] In addition, refer to Figure 1 The circuit breaker 130 also includes a motor 4 and a moving contact 5. The motor 4 drives (or actuates) the moving contact 5 to move, giving the circuit breaker 130 a closed state and an open state. The closed and open states are two instantaneous states. In the closed state, the moving contact 5 contacts the first stationary contact 2 and the second stationary contact 3. In this state, the circuit breaker 130 does not affect the flow of current. In the open state, the motor 4 drives the moving contact 5 to disengage from at least one of the first stationary contact 2 and the second stationary contact 3. That is, the motor 4 drives the moving contact 5 to separate from the first stationary contact 2 or from the second stationary contact 3, or the motor 4 drives the moving contact 5 to separate from both the first stationary contact 2 and the second stationary contact 3 simultaneously, thereby achieving the breaking function.

[0111] To control the tripping, the circuit breaker 130 may also include a current transformer 103 located outside the housing 1, the current transformer 103 being disposed on the first stationary contact 2 or the second stationary contact 3. Figure 1An exemplary illustration shows the case where the current transformer 103 is disposed on the first stationary contact 2, wherein the first stationary contact 2 can be understood as the primary side of the current transformer 103 (if the current transformer 103 is disposed on the second stationary contact 3, then the second stationary contact 3 is the primary side of the current transformer 103). The current transformer 103 is electrically connected to the motor 4, for example, the winding on the secondary side of the current transformer 103 is electrically connected to the motor 4.

[0112] Figure 2 The operating principle of circuit breaker 130 is illustrated exemplarily. When the circuit breaker 130 is in a normal state, it is closed, and the moving contact 5 simultaneously contacts the first stationary contact 2 and the second stationary contact 3, allowing normal current flow. When a short circuit occurs in the circuit breaker 130, the primary side of the current transformer 103 short-circuits, coupling to the secondary side through the magnetic core of the current transformer 103. The winding of the secondary side promptly feeds back to the control circuit to control the operation of the motor 4. The motor 4, carrying the moving contact 5, disengages from at least one of the first stationary contact 2 and the second stationary contact 3, putting the circuit breaker 130 in an open state. This achieves rapid opening of the circuit breaker 130, effectively interrupting the current. Furthermore, arc extinguishing occurs simultaneously with the interruption.

[0113] In other examples, the current transformer 103 may not be provided, and the circuit breaker 130 may also include a sensor for sensing short circuits.

[0114] Since the motor 4 and the moving contact 5 are fixed, that is, rigidly connected, there is no transmission structure such as a spring (springs cannot react quickly) or a connecting rod between them. The moving contact 5 moves synchronously with the motor 4. In this way, the motor 4 can quickly drive the moving contact 5 to move while running, which increases the breaking speed of the moving contact 5 and shortens the breaking time. This can better limit the rise of short-circuit current, reduce the possibility of arc propagation during breaking, achieve low-energy breaking, and reduce the possibility of fault occurrence.

[0115] Furthermore, according to the Class II dynamic output characteristic standard, Figure 3 Two types of dynamic output performance curves are illustrated as examples, wherein, Figure 3The horizontal axis of the graph represents the transient duration (ms), and the vertical axis represents the nominal voltage value (%). When circuit breaker 130 completes the tripping within 1ms, the bus voltage oscillation can be large, for example, 100%. When the tripping time of circuit breaker 130 is longer than 1ms, the upper limit of the nominal instantaneous voltage gradually decreases, for example, from 100% to 35%, 14%, 12%, 11%, etc., and the lower limit of the nominal instantaneous voltage gradually increases, for example, from -100% to -35%, -14%, -12%, -11%, etc., and the range between the upper and lower limits of the instantaneous voltage becomes smaller and smaller. Therefore, when the tripping time of circuit breaker 130 is long, it is necessary to strictly check the changes in the system power supply voltage during the tripping process to ensure that it meets the Class II dynamic output performance curve. For example, when the tripping time is greater than or equal to 100ms, the voltage value needs to be between -10% and 10%. Therefore, this application achieves rapid disconnection by driving the moving contact 5 with the motor 4, which also helps the power supply and distribution system (e.g., UPS system) equipped with the circuit breaker 130 of this application to meet the Class II dynamic output characteristic standard.

[0116] Regarding the structure of motor 4, please refer to the reference. Figure 1 The motor 4 includes a stator 41 and a mover 42. It should be noted that in some examples, the motor 4 also includes a housing for protecting the stator 41 and the mover 42. This application does not impose specific limitations on this. The stator 41 is located outside the housing 1 and is fixedly connected to the housing 1 (for example, fixedly connected to the housing 1 via the housing of the motor 4 described above). The mover 42 is located outside the housing 1 and is movably connected to the stator 41. The stator 41 is used to drive the mover 42 to move. The mover 42 is fixedly connected to the moving contact 5 located inside the housing 1, and the mover 42 is stationary relative to the moving contact 5. That is, when the mover 42 moves, the moving contact 5 will react simultaneously, so that the moving contact 5 achieves synchronous response and improves the breaking speed of the circuit breaker 130.

[0117] It is understandable that the motor 4 drives the moving contact 5 through the stator 41 driving the rotor 42. For example, in the open state, the stator 41 drives the rotor 42 to disengage the moving contact 5 from at least one of the first stationary contact 2 and the second stationary contact 3.

[0118] Figure 4 An exemplary structure of a circuit breaker 130 is shown, wherein the motor is a rotary motor, and the stator 41 is used to drive the rotor 42. Figure 4 The intermediate rotor 42 is located between the stator 41 (and is therefore not shown in the drawing) and rotates. The motor 4 also includes an output shaft 43. Figure 5An exemplary structure of the output shaft 43 is shown. The output shaft 43 is at least partially located inside the motor 4 and fixedly connected to the mover 42. The axis of the output shaft 43 itself coincides with the axis of rotation of the output shaft 43. The output shaft 43 extends from one side of the stator 41, and the housing 1 is located on the side of the stator 41 where the output shaft 43 extends.

[0119] The output shaft 43 is fixedly connected to the moving contact 5. Figure 6 An exemplary connection structure between the output shaft 43 and the moving contact 5 is shown, with reference to Figure 6 The circuit breaker 130 may include a first pin 6 and a second pin 7. The axial directions of the first pin 6, the second pin 7 and the output shaft 43 are parallel to each other. The first pin 6 and the second pin 7 are spaced apart and located on different sides of the rotation axis of the moving contact 5. The first pin 6 and the second pin 7 are both fixedly connected to the output shaft 43 and both pass through the moving contact 5, thereby realizing the fixed connection between the output shaft 43 and the moving contact 5.

[0120] The rotating motor 4 provides a large torque, which is transmitted through the output shaft 43 to the first pin 6 and the second pin 7, and then through the first pin 6 and the second pin 7 to the moving contact 5, causing the moving contact 5 to rotate synchronously, thereby increasing the breaking speed of the circuit breaker 130. It is understood that since the moving contact 5 is located inside the housing 1, the first pin 6 and the second pin 7 need to extend into the housing 1 through the wall of the housing 1. Therefore, the housing 1 is provided with arc-shaped grooves for the rotation of the first pin 6 and the second pin 7. Examples of these arc-shaped grooves are described in other locations in the specific embodiments of this application (in later paragraphs).

[0121] In some other examples, the second pin 7 may be omitted, meaning only the first pin 6 may be provided, and the first pin 6 may be located on one side of the rotation axis of the moving contact 5. The output shaft 43 can also rotate the moving contact 5 via the first pin 6 alone. Alternatively, in some other examples, to reduce the risk of breakage of the first pin 6 and the second pin 7, a third pin, a fourth pin, etc., may be added that are connected to the output shaft 43 and pass through the moving contact 5.

[0122] In some other examples, the output shaft 43 can be directly connected to the moving contact 5 through the housing 1, or the output shaft 43 can be connected to the moving contact 5 through the housing 1 via a connecting shaft whose axis coincides with the axis of the output shaft 43.

[0123] Furthermore, to facilitate the rotation of the moving contact 5, in some examples, the moving contact 5 and the housing 1 (auxiliary reference) are... Figure 5 Rotary connection, for example, the moving contact 5 is rotatably connected to the housing 1 through a shaft structure. This application does not impose any restrictions on the rotary connection structure between the moving contact 5 and the housing 1.

[0124] Regarding the structure of the moving contact 5, in some examples, refer to Figure 6 The moving contact 5 has two contact positions, one of which is the first contact point 51 and the other is the second contact point 52. For example, the moving contact 5 may include a copper part and a silver part, and the positions of the first contact point 51 and the second contact point 52 are both located on the silver part of the moving contact 5.

[0125] Figure 7 An example is shown when the circuit breaker 130 is in the closed state. In the closed state, the position where the moving contact 5 contacts the first stationary contact 2 is the first contact point 51, and the position where the moving contact 5 contacts the second stationary contact 3 is the second contact point 52. Figure 8 An example is shown when the circuit breaker 130 is in the open state, in which the first contact 51 is separated from the first stationary contact 2 and the second contact 52 is separated from the second stationary contact 3.

[0126] To avoid excessive rotation, refer to Figure 7 and Figure 8 The housing 1 has a first stop surface 11 and a second stop surface 12, both located inside the housing. The first stop surface 11 faces the first stationary contact 2, and the second stop surface 12 faces the second stationary contact 3. There is space between the first stop surface 11 and the first stationary contact 2 for the first contact 51 to move, and there is space between the second stop surface 12 and the second stationary contact 3 for the second contact 52 to move. When the circuit breaker 130 trips, the first contact 51 moves away from the first stationary contact 2, that is, towards the first stop surface 11. At the same time, the second contact 52 moves away from the second stationary contact 3, that is, towards the second stop surface 12.

[0127] Both the first stop surface 11 and the second stop surface 12 serve to stop the moving contact 5. That is, the first contact 51 can only rotate between the first stop surface 11 and the first stationary contact 2, and the second contact 52 can only rotate between the second stop surface 12 and the second stationary contact 3, reducing the possibility of the moving contact 5 rotating excessively.

[0128] In addition, in order to extinguish the arc, refer to Figure 7 and Figure 8 The circuit breaker 130 may also include an arc-extinguishing assembly 8, wherein, Figure 2 Arc extinguishing can be achieved through arc extinguishing components 8, each of which includes multiple arc extinguishing grids 81, with an arc running track formed between adjacent arc extinguishing grids 81. Figure 7 and Figure 8 In the example shown, an arc-extinguishing component 8 is provided between the first stationary contact 2 and the first stop surface 11, and an arc-extinguishing component 8 is provided between the second stationary contact 3 and the second stop surface 12.

[0129] Figure 9 The working principle of the arc extinguishing component 8 is illustrated by way of example. Figure 9 (a) in the example shows the moving contact 5 in the closed state; Figure 9 (b) in the example shows the case where the moving contact 5 has just disengaged from the first stationary contact 2 and the second stationary contact 3, and the arc remains near the moving contact 5. The arc between the first contact 51 and the first stationary contact 2, and the arc between the second contact 52 and the second stationary contact 3, both refer to the arc. Figure 9 (c) in the figure exemplarily illustrates the situation where the electric arc (the arc between the contact and the corresponding stationary contact in the figure) enters the arc track; Figure 9 (d) in the example shows the case where the arc is extinguished, at which point the moving contact 5 reaches its maximum opening distance.

[0130] exist Figures 7 to 9 In the example shown, the first stationary contact 2 and the second stationary contact 3 are arranged opposite each other along the diagonal direction of the housing 1. Correspondingly, the first stop surface 11 and the second stop surface 12 are also arranged diagonally in the housing 1. In this way, the volume of the housing 1 can be reduced, which further reduces the volume of the circuit breaker 130 and helps to save space in the equipment cabinet 100.

[0131] Regarding the structure of the moving contact 5, in another example provided in this application, the moving contact 5 is always in contact with the second stationary contact 3. Figure 10 An exemplary illustration shows a situation where the moving contact 5 and the second stationary contact 3 are connected via a wire 53, i.e., they are in contact via the wire 53. In this example, the moving contact 5 in the open state is only separated from the first stationary contact 2, meaning the moving contact 5 only includes the first contact point 51 that is in contact with and separates from the first stationary contact 2. Furthermore, the housing 1 may only have a first stop surface 11, and the arc-extinguishing assembly 8 may only be provided between the first stop surface 11 and the first stationary contact 2.

[0132] In other examples, the moving contact 5 can always slide in contact with the second stationary contact 3. That is, when the moving contact 5 rotates to separate itself from the first stationary contact 2, the two can still come into contact with each other even if there is friction between the moving contact 5 and the second stationary contact 3.

[0133] Figure 11 An exemplary exploded structure of stator 41 and mover 42 is shown. Stator 41 includes two stator seats 411, such as a first stator seat 4111 and a second stator seat 4112. Mover 42 is disposed between the first stator seat 4111 and the second stator seat 4112. Mover 42 includes a mover seat 421 fixedly connected to the stator seat 421 and a plurality of annularly arranged permanent magnets. The mover seat 421 is rotatably engaged with the two stator seats 411, and the plurality of permanent magnets revolve around the rotation axis of the mover seat 421. Figure 11The stator base 411 and the mover base 421 are distributed along the rotation axis of the mover base 421 (as shown by the dashed lines in the diagram). Multiple permanent magnets, including the first permanent magnet 422, are distributed along the rotation axis of the mover base 421.

[0134] The stator 41 also includes multiple magnetic cores. Multiple magnetic cores are arranged in a ring on the first stator base 4111 and the second stator base 4112, and these cores are distributed around the rotation axis of the stator base 411. Among these cores is a first magnetic core 412, which is fixed to the side of the stator base 411 facing the mover base 421. The two poles of the first permanent magnet 422 are distributed along the rotation axis of the mover base 421. For example, the end of the first permanent magnet 422 facing the first stator base 4111 is the N pole, and the end facing the second stator base 4112 is the S pole. The first permanent magnet 422 is located on different sides of the first magnetic core 412 in the rotation direction of the mover base 421 in the open and closed states, respectively. In other words, the first permanent magnet 422 is directly opposite the first magnetic core 412 in the rotation direction of the mover base 421 in the open and closed states, respectively.

[0135] The side facing the first magnetic core 412 can be understood as the first permanent magnet 422's orthogonal projection on the first stator base 4111 at least partially falling on the side of the first magnetic core 412.

[0136] Figure 12 An exemplary illustration shows the rotation of the first permanent magnet 422, wherein, Figure 12 It can be understood as Figure 13 The structure is shown in the cross-sectional development diagram after being cut by a plane parallel to the rotation axis of the moving base 421. Figure 12 In the example shown, the end of the first permanent magnet 422 facing the first stator base 4111 is the N pole, and the end facing the second stator base 4112 is the S pole. In this example, when the motor 4 is loaded with current, the polarity (N pole) of the end of the first permanent magnet 422 near the first stator base 4111 is opposite to the polarity (S pole) of the end of the first magnetic core 412 near the mover base 421.

[0137] When the motor 4 is charged with current, the mover 42 rotates, and the mover base 421 drives the first permanent magnet 422 to rotate from a position facing the first magnetic core 412 to a position facing the other side of the first magnetic core 412. For example, the first permanent magnet 422 rotates from... Figure 12 The position of Figure (a) is first rotated to... Figure 12 The position of the middle (b) diagram, and then from Figure 12 The position of Figure (b) is rotated to Figure 12 The location of diagram (c). That is, from... Figure 12 The left side of the first magnetic core 412 is rotated to the right side of the first magnetic core 412, or in other words, it is rotated from the position directly opposite the left side of the first magnetic core 412 to the position directly opposite the right side of the first magnetic core 412.

[0138] During the aforementioned rotation process, the first magnetic core 412 first attracts the first permanent magnet 422 (in the closed state) located on one side of it, causing it to rotate in one direction (e.g., clockwise) toward the other side of the first magnetic core 412. At this time, under the attraction of the first magnetic core 412, the rotation speed of the first permanent magnet 422 is relatively fast. When the first permanent magnet 422 rotates to the other side of the first magnetic core 412, the first magnetic core 412 continues to attract the first permanent magnet 422. At this time, the rotation speed of the first permanent magnet 422 in the original rotation direction (e.g., clockwise) decreases and gradually comes to a stop.

[0139] For example, refer to Figure 12 The first permanent magnet 422 from Figure 12 The position of the middle (a) figure towards Figure 12 As the position in Figure (b) rotates, the speed gradually increases. The first permanent magnet 422 moves from... Figure 12 The position of the middle (b) diagram is towards Figure 12 As the position in Figure (c) rotates, its speed gradually decreases until it comes to a stop.

[0140] Since the first permanent magnet 422 is fixed on the mover base 421, the change in the rotational speed of the first permanent magnet 422 is also the change in the rotational speed of the entire mover 42. In this way, the mover 42 accelerates first and then decelerates during rotation, reducing the possibility of the mover 42 hitting the housing 1 (e.g., colliding with the first stop surface 11 and the second stop surface 12) during rotation, and also reducing the risk of the mover 42 over-rotating. In addition, the pendulum-shaped rotation of the motor 4 also simplifies the control circuit.

[0141] Furthermore, referring to Figure 12 In any of the figures (a), (b), and (c), the multiple magnetic cores also include a second magnetic core 413. The second magnetic core 413 is fixed to the side wall of the stator base 411 facing the mover base 421. There is a gap between the first magnetic core 412 and the second magnetic core 413. The polarity (S pole) of the end of the first magnetic core 412 near the mover base 421 is opposite to the polarity (N pole) of the end of the second magnetic core 413 near the mover base 421. In the open state, the first permanent magnet 422 is directly opposite to the gap between the first magnetic core 412 and the second magnetic core 413, for example... Figure 12 The state of diagram (c).

[0142] In the closed state, the first permanent magnet 422 is located on the side of the first magnetic core 412 away from the second magnetic core 413. When the motor 4 is running, the first magnetic core 412 attracts the first permanent magnet 422, causing the first permanent magnet 422 to move towards the side of the second magnetic core 413. However, when the first permanent magnet 422 rotates between the first magnetic core 412 and the second magnetic core 413, the first magnetic core 412 attracts the first permanent magnet 422, and the second magnetic core 413 repels the first permanent magnet 422. The rotation speed of the first permanent magnet 422 decreases until it stops. When the motor 4 is turned off, the first permanent magnet 422 stops moving. At this time, the first permanent magnet 422 is directly opposite the gap between the first permanent magnet 422 and the second permanent magnet 423, and the circuit breaker 130 completes rapid disconnection.

[0143] In the examples provided in this application, refer to Figure 12 The magnetic core also includes a third magnetic core 414 and a fourth magnetic core 415, both of which are disposed on the second stator base 4112. The third magnetic core 414 is disposed opposite to the first magnetic core 412, and the fourth magnetic core 415 is disposed opposite to the second magnetic core 413. Figure 12 In the example shown, the polarity (N pole) of the third magnetic core 414 facing the end of the moving base 421 is opposite to the polarity (S pole) of the first magnetic core 412 facing the end of the moving base 421, and the polarity (S pole) of the fourth magnetic core 415 facing the end of the moving base 421 is opposite to the polarity (N pole) of the second magnetic core 413 facing the end of the moving base 421.

[0144] In addition, Figure 12 In the example shown, the multiple permanent magnets also include a second permanent magnet 423, a third permanent magnet, etc. Figure 12 Figures (a), (b), and (c) all indicate the polarity of the permanent magnets shown, which will not be repeated here.

[0145] Understandably, in order to generate magnetism on the first magnetic core 412, the second magnetic core 413, and other magnetic cores, a coil 44 is wound on each magnetic core. Furthermore, in some examples, the coils 44 on multiple magnetic cores can be interconnected, and the direction of the magnetic poles on different magnetic cores can be adjusted by adjusting the winding direction.

[0146] In some other examples, the stator 41 may consist of only a stator seat 411 disposed to the side of the mover 42, the stator seat 411 and the mover 42 being distributed in a direction parallel to the rotation axis of the mover 42. The structure of this example can be referred to... Figure 11 and Figure 12 The structure after removing the second stator 4112.

[0147] In some other examples, each stator base 411 has only one magnetic core, which is located to the side of the rotation axis of the mover base 421. For example, the first stator base 4111 includes only the first magnetic core 412, and the second stator base 4112 includes only the third magnetic core 414.

[0148] In some other examples, only one permanent magnet is provided on the moving base 421. For example, only the first permanent magnet 422 is provided on the stator base 411, and no other permanent magnets are provided.

[0149] To enable the moving contact 5 to have overtravel capability, the circuit breaker 130 also includes a linkage assembly 9 and a spring 10. Figure 13 An exemplary structure is shown where the linkage assembly 9 and the spring 10 are mounted on the housing 1. Figure 14 An example is shown with part of the structure of the housing 1 concealed.

[0150] Among them, reference Figure 14 The linkage assembly 9 includes a first link 91, a second link 92, and a third link 93.

[0151] Both the first link 91 and the second link 92 are rotatably connected to the housing 1 (e.g., rotatably connected via a shaft structure). The rotation axis of the first link 91 relative to the housing 1 is parallel to the rotation axis of the second link 92 relative to the housing 1. One end of the third link 93 is rotatably connected to the first link 91, and the other end of the third link 93 is rotatably connected to the second link 92. The rotation axis of the first link 91 relative to the third link 93 is parallel to the rotation axis of the second link 92 relative to the third link 93. The positions where the housing 1 is rotatably connected to the first link 91 (e.g., the position indicated by arrow S1) and the positions where it is rotatably connected to the second link 92 (e.g., the position indicated by arrow S2) are both located on the same side of the length direction of the third link 93. Furthermore, the length direction of the first link 91 is parallel to the length direction of the second link 92. In this way, the first link 91, the second link 92, the third link 93 and the housing 1 together form a structure similar to a "four-bar linkage", and one of the first link 91, the second link 92 and the third link 93 can drive the other two to move.

[0152] Figure 15 An exemplary connection between the link assembly 9 and the moving contact 5 is shown, wherein the rotation axis of the second link 92 relative to the housing 1 coincides with the rotation axis of the moving contact 5 relative to the housing 1, and the second link 92 and the moving contact 5 are rotatably connected. Figure 16 An example is shown from another perspective. Figure 15 The structure, refer to Figure 16The position where the moving contact 5 is rotatably connected to the second link 92 (e.g., the position indicated by arrow S3) is located to the side of the position where the moving contact 5 is rotatably connected to the housing 1 (e.g., the position indicated by arrow S4). With the above design, when any of the first link 91, the second link 92, and the third link 93 rotates, the moving contact 5 will also rotate accordingly, realizing the linkage between the link assembly 9 and the moving contact 5.

[0153] Any one of the first link 91, the second link 92, and the third link 93 is connected to one end of the spring 10, and the other end of the spring 10 is connected to the housing 1. In the closed state, the spring 10 drives the moving contact 5 to press against the first stationary contact 2 via the link assembly 9. That is, in the closed state, the spring 10 drives any one of the first link 91, the second link 92, and the third link 93 to rotate through tension (spring 10 is a tension spring / tension spring) or thrust (spring 10 is a compression spring / compression spring), thereby driving the moving contact 5 to press against the first stationary contact 2, achieving the overtravel requirement of the moving contact 5. Under the action of the spring 10, the moving contact 5 applies a force to the first stationary contact 2, reducing the possibility of the moving contact 5 separating from the first stationary contact 2 in the closed state, reducing the impact of the circuit breaker 130 on the normal operation of the system, and reducing the possibility of line faults.

[0154] Furthermore, there is a first time period and a second time period between the closed and open states. During both the first and second time periods, the moving contact 5 is separated from the first stationary contact 2 (or, the moving contact 5 is simultaneously separated from both the first stationary contact 2 and the second stationary contact 3). The difference between the first and second time periods is that, in the second time period, although the first contact 51 rotates away from the first stationary contact 2 under the drive of the motor 4, the force exerted by the spring 10 on the moving contact 5 drives the first contact 51 towards the first stationary contact 2. In the first time period, the motor 4 still drives the moving contact 5 to separate from the first stationary contact 2, but the force exerted by the spring 10 on the moving contact 5 drives the first contact 51 to move away from the first stationary contact 2.

[0155] by Figure 15 The example shown illustrates the actuation of spring 10. (Refer to...) Figure 15The linkage assembly 9 also includes a rotating shaft 97, which passes through the first link 91 and the third link 93. The first link 91 and the third link 93 are rotatably connected via the rotating shaft 97. One end of the spring 10 is connected to the rotating shaft 97, and the other end is connected to the housing 1. The rotating shaft 97 enables the rotatable connection between the first link 91 and the third link 93, and also provides a connection position for the spring 10, which is beneficial for the installation of the spring 10. When the force of the spring 10 is transmitted to the rotating shaft 97, the rotating shaft 97 can simultaneously drive the first link 91 and the third link 93 to move, and through the third link 93, drive the second link 92 and the moving contact 5 to rotate.

[0156] Reference Figure 16 The position where the moving contact 5 is rotatably connected to the second link 92 (e.g., the position indicated by arrow S3) is located on the side facing the first stationary contact 2, where the moving contact 5 is rotatably connected to the housing 1 (e.g., the position indicated by arrow S4). In this example, the spring 10 is a tension spring (or a resistance spring), see reference... Figure 15 The position where the housing 1 is connected to the spring 10 (e.g., the position indicated by arrow S5) and the position where the housing 1 is rotatably connected to the first link 91 (e.g., the position indicated by arrow S1) are located on the same side of the length direction of the third link 93. Figure 15 (Right side of the third link 93).

[0157] In the closed state, the angle between the length direction of the spring 10 and the length direction of the third link 93 is smaller than the angle between the length direction of the first link 91 and the length direction of the third link 93, and the moving contact 5 contacts the side of the first stationary contact 2 facing the rotating shaft 97.

[0158] When determining the included angle along the aforementioned length direction, the line of sight is parallel to the rotation axis of the moving contact 5, and the length direction of the first connecting rod 91 is ( Figure 16 The direction of extension of the dashed line L1 in the diagram represents the distribution direction of the two ends of the first link 91 (the end connecting the third link 93 and the end connecting the housing 1). The length direction of the third link 93 ( Figure 16 The direction of extension of the dashed line L2 in the figure represents the distribution direction of the two ends of the third link 93 (the end connecting the first link 91 and the end connecting the second link 92). The length direction of the spring 10 ( Figure 16 The direction of the extension of the dashed line L3 in the figure represents the distribution direction of the two ends of the spring 10 (one end connecting the rotating shaft 97 and the other end connecting the housing 1).

[0159] Figure 17 for Figure 16 A schematic diagram of the mechanical principle of the middle connecting rod assembly 9. Figure 17 The arrow on the side of spring 10 indicates the direction of the applied force (tension) of spring 10. Figure 17 Figure (a) in the diagram refers to the situation when the circuit is closed. Figure 17The angle (e1) between the length direction of spring 10 and the length direction of third link 93 is smaller than the angle (e2) between the length direction of first link 91 and the length direction of third link 93. In this case, the tension of spring 10 drives the rotating shaft 97 to move towards the side of the first stationary contact 2, and the third link 93 presses the moving contact 5 against the side of the first stationary contact 2 facing the rotating shaft 97 (auxiliary reference). Figure 16 In this way, the spring 10 can drive the connecting rod assembly 9 to press the first contact 51 against the first stationary contact 2. The first contact 51 pressing against the first stationary contact 2 achieves a tight fit between the moving contact 5 and the first stationary contact 2 in the closed state, reducing the possibility of separation between the two.

[0160] It should be noted that in the example where the moving contact 5 has a second contact 52, refer to... Figure 16 When the first contact 51 presses against the first stationary contact 2, the second contact 52 presses against the second stationary contact 3.

[0161] Reference Figure 17 In Figure (b), in the open state, the angle (e1) between the length direction of spring 10 and the length direction of the third link 93 is greater than the angle (e2) between the length directions of the first link 91 and the third link 93. At this time, spring 10 pulls the moving contact 5 in the opposite direction, causing the position on the moving contact 5 that contacts the first stationary contact 2 (first contact point 51) to tend to move away from the first stationary contact 2. In some examples where the housing 1 has a first stop surface 11 (or, the housing 1 has a first stop surface 11 and a second stop surface 12), spring 10 may pull the moving contact 5 against the first stop surface 11 (or pull the moving contact 5 against both the first stop surface 11 and the second stop surface 12 simultaneously). At this time, the moving contact 5 will not reverse and contact the first stationary contact 2 again, and the circuit breaker 130 remains in the open state, ensuring that the opening function of the circuit breaker 130 can be stably realized and reducing the possibility of fault propagation.

[0162] exist Figure 17 The closed state shown in Figure (a) is rotated to... Figure 17 During the tripping process shown in Figure (b), there is a first time period and a second time period, during which the moving contact 5 moves from... Figure 17(a) When the closed state shown in the figure begins to rotate, a second time period first passes. That is, the first contact 51 rotates away from the first stationary contact 2 under the drive of the motor 4 (e.g., the moving contact 5 rotates clockwise). However, the spring 10 applies a pulling force to the moving contact 5 to move the first contact 51 towards the first stationary contact 2 (e.g., a pulling force that drives the moving contact 5 to rotate counterclockwise). Then, the moving contact 5 passes through the first time period. At this time, the motor 4 still drives the first contact 51 to move away from the first stationary contact 2 (e.g., the moving contact 5 rotates clockwise), but the spring 10 applies a pulling force to the moving contact 5 to move the first contact 51 away from the first stationary contact 2 (e.g., a pulling force that drives the moving contact 5 to rotate counterclockwise) until the moving contact 5 moves to the "open state" described in this application.

[0163] In some examples, multiple springs 10 may be provided, with multiple springs 10 spaced apart along the length of the rotation axis 97. This application does not impose specific limitations on this.

[0164] In addition, to make the linkage between the linkage assembly 9 and the moving contact 5 more stable, the linkage assembly 9 also includes a fourth link 94, a fifth link 95, and a sixth link 96. Figure 18 The distribution of the linkage assembly 9 is shown as an example. Figure 19 An example is shown showing the connection between multiple links.

[0165] The fourth link 94, the fifth link 95, and the sixth link 96 are all located at the moving contact 5 (located at...). Figure 18 The interior of the middle shell 1 can also be used as a reference. Figure 16 The moving contact 5 is located on the side opposite to the third link 93. That is, the moving contact 5 includes a first side and a second side, which are distributed along the rotation axis of the moving contact 5 relative to the housing 1. The first link 91, the second link 92 and the third link 93 are located on the first side of the moving contact 5, and the fourth link 94, the fifth link 95 and the sixth link 96 are located on the second side of the moving contact 5.

[0166] Reference Figure 18 and Figure 19Both the fourth link 94 and the fifth link 95 are rotatably connected to the housing 1. The rotation axis of the fourth link 94 relative to the housing 1 coincides with the rotation axis of the first link 91 relative to the housing 1, and the rotation axis of the fifth link 95 relative to the housing 1 coincides with the rotation axis of the second link 92 relative to the housing 1. One end of the sixth link 96 is rotatably connected to the fourth link 94 via a rotating shaft 97, and the other end is rotatably connected to the fifth link 95. The positions on the housing 1 that rotatably connect the fourth link 94 (e.g., the position indicated by arrow S6) and the positions that rotatably connect the housing 1 to the fifth link 95 (e.g., the position indicated by arrow S7) are located on the same side of the length direction of the sixth link 96. The length direction of the fourth link 94 is parallel to the length direction of the fifth link 95. The fifth link 95 is rotatably connected to the moving contact 5, and the rotation axis of the fifth link 95 relative to the moving contact 5 coincides with the rotation axis of the second link 92 relative to the moving contact 5.

[0167] In other words, the fourth link 94, the fifth link 95, the sixth link 96, and the housing assembly 19 form a structure similar to a "four-bar linkage." The linkage assembly 9 can be understood as a combination of two sets of "four-bar linkage" structures. A set of "four-bar linkages" is set on each side of the moving contact 5 and they are interconnected, making the movement of the linkage assembly 9 smoother. Furthermore, the rotating shaft 97 simultaneously realizes the rotational connection of multiple links, which further simplifies the structure and reduces production costs.

[0168] To further simplify the structure, in the example where the circuit breaker 130 includes a first pin 6 and a second pin 7, refer to... Figure 19 The second link 92 and the fifth link 95 can be connected by a first pin 6 and a second pin 7. For example, the first pin 6 passes through the second link 92, the third link 93, the moving contact 5, the fifth link 95, and the sixth link 96, and the second pin 7 passes through the second link 92, the moving contact 5, and the fifth link 95. The third link 93 and the moving contact 5 are both rotatably connected to the second link 92 via the first pin 6, and the sixth link 96 and the moving contact 5 are both rotatably connected to the fifth link 95 via the first pin 6. (Return to reference) Figure 5 The output shaft 43 can be fixedly connected to the second connecting rod 92, and the axis of the output shaft 43 coincides with the rotation axis of the second connecting rod 92 relative to the housing 1.

[0169] Continue to refer to Figure 18 and Figure 19 When the motor 4 needs to drive the moving contact 5 to rotate, the output shaft 43 drives the first pin 6 and the second pin 7 to rotate, and the first pin 6 and the second pin 7 move the moving contact 5 and the connecting rod assembly 9. The motor 4 drives the moving contact 5 through the first pin 6 and the second pin 7, and at the same time drives the connecting rod assembly 9 to move, which simplifies the structure of the circuit breaker 130 and facilitates production and maintenance.

[0170] Regarding the structure of shell 1, in one example, refer to... Figure 20 , Figure 20 An example of the exploded structure of the casing 1 is shown (the connected structure can be referred to). Figure 13 The housing 1 includes a protective shell 13, a first side plate 14, and a second side plate 15.

[0171] The moving contact 5 is located inside the protective housing 13 and rotatably connected to it. The first stationary contact 2 and the second stationary contact 3 are both at least partially located inside the protective housing 13. In the example where the circuit breaker 130 includes an arc-extinguishing assembly 8, the arc-extinguishing assembly 8 is also located inside the protective housing 13; that is, the closing and opening of the circuit breaker 130 are both achieved within the protective housing 13. The first side plate 14 and the second side plate 15 are both located outside the housing 1 and on different sides of the housing 1, respectively. The first side plate 14 and the second side plate 15 are distributed along the rotation axis of the moving contact 5 relative to the protective housing 13. The first side plate 14 is fixedly connected to the protective housing 13 with a gap between them, and the second side plate 15 is also fixedly connected to the protective housing 13 with a gap between them. For example, both the first side plate 14 and the second side plate 15 are fixedly connected to the protective housing 13 via a support column (not shown in the figures).

[0172] To reduce the possibility of interference in link assembly 9, refer to Figure 20 and Figure 21 , Figure 21 An exemplary illustration shows the linkage assembly 9 mounted on the first side plate 14 and the second side plate 15. The first link 91 and the third link 93 (which is...) Figure 21 One of the first connecting rods (14) is positioned in the gap between the first side plate 14 and the protective shell 13, while the other is positioned on the side of the first side plate 14 away from the protective shell 13. The second connecting rod 92 and the first connecting rod 91 are located on the same side of the first side plate 14. That is, the first connecting rod 91 and the second connecting rod 92 are located on the same side of the first side plate 14, and the third connecting rod 93, which rotatably connects the first connecting rod 91 and the second connecting rod 92, is located on the other side of the first side plate 14. In this way, the first connecting rod 91 and the third connecting rod 93 can be rotatably connected while maintaining a gap, so that they will not rub against each other or interfere with each other. Similarly, the second connecting rod 92 and the third connecting rod 93 can also be rotatably connected while maintaining a gap, so that they will not rub against each other or interfere with each other, allowing the connecting rod assembly 9 to rotate stably.

[0173] exist Figure 21 In the example shown, the auxiliary reference Figure 18 and Figure 19The third link 93 is disposed in the gap between the first side plate 14 and the protective shell 13, and the first link 91 and the second link 92 are disposed on the side of the first side plate 14 away from the protective shell 13. In other examples, the first link 91 and the second link 92 are disposed in the gap between the first side plate 14 and the protective shell 13, and the third link 93 is disposed on the side of the first side plate 14 away from the protective shell 13.

[0174] In addition, refer to Figures 17 to 21 One of the fourth link 94 and the sixth link 96 is disposed in the gap between the first side plate 14 and the protective shell 13, and the other is disposed on the side of the first side plate 14 opposite to the protective shell 13. The fifth link 95 is located on the same side of the first side plate 14 as the fourth link 94. That is, the fourth link 94 and the fifth link 95 are located on the same side of the first side plate 14, and the sixth link 96, which rotatably connects the fourth link 94 and the fifth link 95, is located on the other side of the first side plate 14. Through the above design, the possibility of mutual friction or interference of the link assemblies 9 is further reduced.

[0175] Reference Figure 19 and Figure 20 To facilitate the rotation of the first pin 6 and the second pin 7, the housing 1 is provided with at least one first arc-shaped groove 16 through which the first pin 6 passes. The first pin 6 is slidably engaged with each first arc-shaped groove 16. The housing 1 is also provided with at least one second arc-shaped groove 17 through which the second pin 7 passes. The second pin 7 is slidably engaged with each second arc-shaped groove 17.

[0176] For example, in an example where the housing 1 includes a protective shell 13, a first side plate 14, and a second side plate 15, refer to... Figure 20 and Figure 21 The first side plate 14 has a first arc-shaped groove 16 and a second arc-shaped groove 17, and the second side plate 15 has a first arc-shaped groove 16 and a second arc-shaped groove 17. The protective shell 13 has a first arc-shaped groove 16 and a second arc-shaped groove 17 on its side wall near the first side plate 14, and a first arc-shaped groove 16 and a second arc-shaped groove 17 on its side wall near the second side plate 15. The multiple first arc-shaped grooves 16 correspond to each other, and a first pin 6 passes through all the first arc-shaped grooves 16 and slides along the guiding direction of each first arc-shaped groove 16. The multiple second arc-shaped grooves 17 correspond to each other, and a second pin 7 passes through all the second arc-shaped grooves 17 and slides along the guiding direction of each second arc-shaped groove 17.

[0177] In addition, in some examples, refer to Figure 21The rotating shaft 97 can be slidably connected to the housing 1. For example, the housing 1 is provided with a third arc-shaped groove 18, through which the rotating shaft 97 passes and slides in cooperation with the third arc-shaped groove 18. In an example where the housing 1 includes a protective shell 13, a first side plate 14, and a second side plate 15, the rotating shaft 97 is located outside the protective shell 13. The first side plate 14 and the second side plate 15 extend toward the rotating shaft 97. Each of the first side plate 14 and the second side plate 15 is provided with a third arc-shaped groove 18. The rotating shaft 97 passes through the two third arc-shaped grooves 18 and slides along the guiding direction of each third arc-shaped groove 18.

[0178] In some other examples, when the first link 91 and the third link 93 are located on different sides of the first side plate 14, the rotation shaft 97 can be located above the first side plate 14.

[0179] In other examples, where the linkage assembly 9 includes only the first link 91, the second link 92, and the third link 93, the housing 1 may include a first side plate 14 of the protective housing 13 (without a second side plate 15), the first side plate 14 being located outside the protective housing 13 and distributed along the rotation axis of the moving contact 5 relative to the protective housing 13.

[0180] In other examples, housing 1 can be a complete shell structure; for example, excluding the first side plate 14 and the second side plate 15, housing 1 is a structure similar to the protective shell 13 described above. In this example, the moving contact 5 is located inside housing 1, and the linkage assembly 9 can be located outside housing 1.

[0181] Regarding the drive of spring 10 to link assembly 9, Figure 22 Another arrangement of the spring 10 is illustrated as an example. Figure 22 The arrow on the side of the spring 10 indicates the direction of the force (thrust) applied by the spring 10. In this example, the spring 10 is a compression spring (or a pressure spring). Furthermore, the position where the housing 1 is connected to the spring 10 (e.g., the position indicated by arrow S8) and the position where the housing 1 is rotatably connected to the first link 91 (e.g., the position indicated by arrow S9) are located on different sides of the length direction of the third link 93. One end of the spring 10 is connected to the rotating shaft 97, and the other end is connected to the housing 1. Figure 22 Figure (a) shows the linkage assembly 9 in the closed state. Under the push of the spring 10, the first contact 51 is pressed against the first stationary contact 2 (auxiliary reference). Figure 16 (state) Figure 22 Figure (b) shows the situation of the linkage assembly 9 in the open state. Under the push of the spring 10, the moving contact 5 will not reverse, causing the first contact 51 to contact the first stationary contact 2.

[0182] Figure 23 Another arrangement of the spring 10 is illustrated by way of example. Figure 23 The arrow on the side of the spring 10 indicates the direction of the force (tension) applied to the spring 10. In this example, the spring 10 is a tension spring, and the position where the housing 1 is connected to the spring 10 (e.g., the position indicated by arrow S10) and the position where the housing 1 is rotatably connected to the first link 91 (e.g., the position indicated by arrow S11) are on the same side of the length direction of the third link 93. One end of the spring 10 is connected to the third link 93, and the other end is connected to the housing 1. Figure 23 Figure (a) shows the linkage assembly 9 in the closed state. Under the pull of the spring 10, the first contact 51 is pressed against the first stationary contact 2 (auxiliary reference). Figure 16 (state) Figure 23 Figure (b) shows the situation of the linkage assembly 9 in the open state. Under the pull of the spring 10, the moving contact 5 will not reverse, causing the first contact 51 to contact the first stationary contact 2.

[0183] The examples of the placement and connection methods of the spring 10 in this application are merely illustrative and not intended to limit the scope of this application. Any placement and connection method that achieves the functions and effects defined in this application by simply modifying or altering the position of the spring 10 is within the scope of protection claimed in this application.

[0184] To facilitate the rotation of the motor 4, the circuit breaker 130 also includes a circuit board 101 and at least one capacitor 102. Figure 24 An exemplary diagram shows the structure of a circuit board 101 and a capacitor 102, with at least one capacitor 102 disposed on the circuit board 101. Furthermore, Figure 2 The control circuit can also be set on the circuit board 101. The motor 4 is electrically connected to at least one capacitor 102, which is used to electrically connect to a power source. The power source can be an auxiliary power source inside or outside the equipment cabinet 100, or other power supply devices capable of supplying power to the motor 4.

[0185] exist Figure 24 In the example shown, the circuit board 101 and the housing 1 move along the contact 5 (auxiliary reference). Figure 18 The circuit breakers 102 are distributed along the rotation axis direction. For example, the circuit board 101 is located on the side of the motor 4 away from the housing 1. Multiple capacitors 102 are provided, all positioned between the circuit board 101 and the housing 1. Furthermore, the multiple capacitors 102 are distributed on both sides of the motor 4; for example, two or more capacitors 102 are provided on each side of the motor 4. Alternatively, the multiple capacitors 102 can be arranged around the motor 4 to reduce the size of the circuit breaker 130.

[0186] In some other examples, each circuit breaker 130 includes only one capacitor 102, and the capacitor 102 of each circuit breaker 130 is located on the side of the electrically connected motor 4.

[0187] In some other examples, the circuit board 101 and the capacitor 102 may also be spaced apart from the housing 1, for example, the circuit board 101 and the housing 1 may be spaced apart along a direction perpendicular to the rotation axis of the moving contact 5.

[0188] In other examples, a circuit breaker 130 can trip multiple lines. For instance, when the circuit breaker 130 is used in an AC circuit, the copper busbars 120 of phases A, B, and C in each AC circuit are connected to a corresponding circuit breaker 130. Figure 25 An exemplary structure of this type of circuit breaker 130 is shown, with reference to Figure 25 The circuit breaker 130 includes three housings 1 and two motors 4. Each housing 1 is provided with a first stationary contact 2, a second stationary contact 3 and a moving contact 5. The three moving contacts 5 can be connected by the same first pin 6 and the same second pin 7. The two motors 4 are located at both ends of the distribution direction of the three housings 1. The mover 42 of each motor 4 is fixed to the first pin 6 and the second pin 7. The two motors 4 jointly drive the three moving contacts 5 in the three housings 1 to rotate synchronously.

[0189] In other examples, multiple moving contacts 5 can be rotated by a single motor 4, as long as the multiple moving contacts 5 are fixedly connected, or a synchronous drive structure is set up.

[0190] Multiple circuit breakers 130 of this application can also be installed in the equipment cabinet 100. For example, when the circuit breaker 130 is used in an AC line, three circuit breakers 130 can be installed in each AC line, and the three circuit breakers 130 are respectively connected to the three phases A, B and C of the AC line.

[0191] Figure 26 An exemplary first arrangement of multiple circuit breakers 130 is shown, in which each circuit breaker 130 is structured as follows: Figure 24 Taking the circuit breaker 130 structure as an example, refer to Figure 26 The housing 1 of multiple circuit breakers 130 moves along the contact 5 (auxiliary reference). Figure 18 The rotation axes are spaced apart in the direction of rotation. For ease of wiring, in some examples, the first stationary contact 2 and the second stationary contact 3 of each circuit breaker 130 extend from different sides of the distribution direction of the multiple circuit breakers 130, or the first stationary contact 2 and the second stationary contact 3 of each circuit breaker 130 extend from the same side of the distribution direction of the multiple circuit breakers 130.

[0192] Figure 27 An exemplary second arrangement of multiple circuit breakers 130 is shown, in which each circuit breaker 130 is structured as follows: Figure 24 Taking the circuit breaker 130 structure as an example, refer to Figure 27, the housings 1 of multiple circuit breakers 130 are distributed at intervals in a direction perpendicular to the rotation axis of the moving contact 5 (auxiliary reference Figure 18 ). For the convenience of wiring, in some examples, the first stationary contact 2 and the second stationary contact 3 of each circuit breaker 130 extend from different sides of the distribution direction of the multiple circuit breakers 130, or the first stationary contact 2 and the second stationary contact 3 of each circuit breaker 130 both extend from the same side of the distribution direction of the multiple circuit breakers 130.

[0193] Figure 28 An exemplary third arrangement mode of multiple circuit breakers 130 is shown. The structure of each circuit breaker 130 in this example takes the structure of the circuit breaker 130 in Figure 24 as an example. Referring to Figure 28 , the housing 1 of multiple circuit breakers 130 includes a first housing 191, a second housing 192 and a third housing 193. The first housing 191 and the second housing 192 are distributed at intervals in the direction of the rotation axis of the moving contact 5 (auxiliary reference Figure 18 ). The third housing 193 is located on the side of the first housing 191 and the second housing 192, and the third housing 193 faces the gap between the first housing 191 and the second housing 192. That is, the three circuit breakers 130 are arranged in a "pin" shape.

[0194] ​​​​​​​​​​​​​​​​​

[0197] Figure 31 An exemplary sixth arrangement of multiple circuit breakers 130 is shown, referring to Figure 31 , each circuit breaker 130 includes a plurality of capacitors 102 electrically connected to the motor 4. The capacitor bank 1021 is located on the side of the housing group 19. The capacitor bank 1021 and the housing group 19 are distributed in a direction perpendicular to the rotation axis of the moving contact 5 (auxiliary reference Figure 18 ), and the plurality of housings 1 of the housing group 19 are distributed in a "pin" shape.

[0198] In some other examples, there are multiple circuit breakers 130. One of the circuit breakers 130 includes a capacitor 102, and the remaining circuit breakers 130 do not have capacitors 102. The capacitor 102 on the circuit breaker 130 with the capacitor 102 is electrically connected to the motor 4 of the multiple circuit breakers 130.

[0199] The present application also provides another way for the motor 4 to drive the moving contact 5 to move, referring to Figure 32 , Figure 32 An exemplary situation where the linear motor 4 drives the moving contact 5 to move is shown.

[0200] Among them, the stator 41 includes two stator seats 411, for example, the first stator seat 4111 and the second stator seat 4112. The rotor 42 is located between the first stator seat 4111 and the second stator seat 4112. Figure 33 An exemplary structure of the rotor 42 is shown. Among them, the rotor 42 includes a rotor seat 421 and a first permanent magnet 422 that are fixedly connected to each other.

[0201] Referring to Figure 32 and Figure 33 , the stator seat 411 is slidably connected to two rotor seats 421. For example, each rotor seat 421 is provided with a sliding seat 45 having a groove 451. The sliding seats 45 on the two stator seats 411 correspond one by one. The two grooves 451 on the opposite sliding seats 45 are close to each other. The two corresponding grooves 451 form a sliding space for the rotor seat 421 to slide, and the rotor seat 421 is slidably engaged with this sliding space.

[0202] The distribution directions of the first stator seat 4111, the second stator seat 4112 and the rotor seat 421 are perpendicular to the sliding direction of the rotor seat 421, referring to Figure 33The stator 41 also includes a first magnetic core 412, which is fixed to the wall surface of the first stator base 4111 facing the moving base 421. A first permanent magnet 422 is located on the side of the moving contact 5 away from the first stationary contact 2, and the first magnetic core 412 is at least partially located on the side of the first permanent magnet 422 facing the first stationary contact 2. That is, in one example, the first magnetic core 412 is completely located on the side of the first permanent magnet 422 facing the first stationary contact 2. In another example, the orthographic projection of the first permanent magnet 422 onto the first stator base 4111 partially overlaps with the orthographic projection of the first permanent magnet 422 onto the first stator base 4111. Figure 33 The example shown is one of these.

[0203] When the circuit breaker 130 is in the closed state, since the first magnetic core 412 is at least partially located on the side of the first permanent magnet 422 near the first stationary contact 2, the portion of the first magnetic core 412 located on the side of the first permanent magnet 422 near the first stationary contact 2 attracts the first permanent magnet 422 to move towards the first stationary contact 2. Figure 33 The arrows on both sides of the moving element 42 indicate the direction of attraction. At this time, the motor 4 is not loaded with current, and the attraction of the first magnetic core 412 to the first permanent magnet 422 is only the attraction of the metal to the first permanent magnet 422. The first permanent magnet 422 moves the moving element seat 421, and the moving element seat 421 moves the moving contact 5. Under the action of the attraction, the moving contact 5 presses against the first stationary contact 2 and the second stationary contact 3, realizing the overtravel requirement of the moving contact 5 and reducing the possibility of the moving contact 5 detaching from the first stationary contact 2 and the second stationary contact 3.

[0204] Figure 34 The illustrative diagram shows the movement position of the mover 42 in the open state. The arrow on the side of the mover 42 indicates the force exerted by the first magnetic core 412 on the mover 42. When current is applied, the polarity (e.g., S pole) of the end of the first magnetic core 412 facing the mover base 421 is the same as the polarity (e.g., S pole) of the end of the first permanent magnet 422 facing the first stator base 4111. The first magnetic core 412 pushes the first permanent magnet 422 toward the side away from the first stationary contact 2. In the open state, the first permanent magnet 422 is located on the side of the first magnetic core 412 away from the first stationary contact 2. That is, the mover 42 moves away from the first stationary contact 2, and the mover 42, along with the moving contact 5, separates from the first stationary contact 2, thus realizing the opening of the circuit breaker 130.

[0205] In addition, in some examples, refer to Figure 33 and Figure 34The mover 42 also includes a second permanent magnet 423, which assists the first permanent magnet 422 in driving the mover base 421. In the closed state, the second permanent magnet 423 is located on the side of the first magnetic core 412 facing the first stationary contact 2. There is a gap between the second permanent magnet 423 and the first magnetic core 412; that is, the orthographic projection of the second permanent magnet 423 on the first stator base 4111 does not overlap with the orthographic projection of the first magnetic core 412 on the first stator base 4111. However, the orthographic projection of the first magnetic core 412 on the first stator base 4111 partially overlaps with the orthographic projection of the first permanent magnet 422 on the first stator base 4111. It can be understood that the second permanent magnet 423 is farther from the first magnetic core 412 than the first permanent magnet 422.

[0206] When no power is applied, the first magnetic core 412 will attract the first permanent magnet 422 but not the second permanent magnet 423 (or, the force between the first magnetic core 412 and the first permanent magnet 422 is greater), so that the moving part 42 can move towards the first stationary contact 2 under the action of the attraction until the moving contact 5 presses against the first stationary contact 2.

[0207] After being powered on, the first magnetic core 412 has a large magnetism and acts on the first permanent magnet 422 and the second permanent magnet 423 at the same time. For example, it first pushes the first permanent magnet 422 to move a certain distance, and then attracts the second permanent magnet 423 to move a certain distance, so that the mover 42 can move in a straight line at least away from the first stationary contact 2, and the moving distance is longer. The longer opening distance reduces the possibility of arcing.

[0208] exist Figure 33 and Figure 34 In the example shown, the stator 41 may further include a second magnetic core 413, which is disposed on the side of the second stator base 4112 facing the first stator base 4111, and is disposed opposite to the first magnetic core 412. When a current is applied, the polarity (e.g., N pole) of the end of the second magnetic core 413 facing the mover base 421 is the same as the polarity (e.g., N pole) of the end of the first permanent magnet 422 facing the second stator base 4112.

[0209] It is understandable that, in order to generate magnetism in the first magnetic core 412 and the second magnetic core 413, coils 44 are wound on the first magnetic core 412 and the second magnetic core 413 respectively. In some examples, the coils 44 on the first magnetic core 412 and the second magnetic core 413 can be connected to each other, and the magnetic poles on different magnetic cores can be adjusted by adjusting the winding direction.

[0210] In some other examples, the stator 41 may also consist of only a stator base 411 and a first magnetic core 412, the first magnetic core 412 being fixed to the wall of the stator base 411 facing the mover base 421.

[0211] Figures 32 to 34 In the example shown, in the open state, the moving contact 5 is simultaneously separated from the first stationary contact 2 and the second stationary contact 3. In some other examples, in the open state, the moving contact 5 is separated only from the first stationary contact 2; that is, the moving contact 5 is always connected to the second stationary contact 3. Figure 35 An exemplary structure of another circuit breaker 130 driven by a linear motor 4 is shown, wherein a conductive contact strip 31 is provided on the second stationary contact 3. When the moving contact 5 is separated from the first stationary contact 2, the moving contact 5 is always in contact with the contact strip 31 on the second stationary contact 3, thereby realizing the connection between the second stationary contact 3 and the moving contact 5.

[0212] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A circuit breaker, characterized in that, It includes a housing, a first stationary contact, and a second stationary contact, both of which are at least partially located within the housing; The circuit breaker also includes a motor and a moving contact. The motor includes a stator and a mover. The stator is located outside the housing and is fixedly connected to the housing. The mover is located outside the housing and is movably connected to the stator. The stator is used to drive the mover. The mover is fixedly connected to the moving contact located inside the housing, and the mover is stationary relative to the moving contact. The circuit breaker has a closed state and an open state. In the closed state, the moving contact contacts the first stationary contact and the second stationary contact. In the open state, the moving element drives the moving contact to disengage from at least one of the first stationary contact or the second stationary contact.

2. The circuit breaker according to claim 1, characterized in that, The motor is a rotary motor, the stator is used to drive the mover to rotate, the motor also includes an output shaft, the output shaft is fixedly connected to the mover, the output shaft extends from one side of the stator, the housing is located on the side of the stator where the output shaft extends, the output shaft is fixedly connected to the moving contact, and the moving contact is rotatably connected to the housing.

3. The circuit breaker according to claim 2, characterized in that, The stator includes a stator base and a first magnetic core, and the mover includes a mover base and a first permanent magnet that are fixedly connected. The stator base and the mover base are distributed along the rotation axis of the mover base. The first magnetic core is fixed to the wall of the stator base facing the mover base. The two poles of the first permanent magnet are distributed along the rotation axis of the mover base. The first permanent magnet is located on different sides of the first magnetic core in the rotation direction of the mover base in the open state and the closed state, respectively.

4. The circuit breaker according to claim 3, characterized in that, The stator also includes a second magnetic core, which is fixed to the stator base on the side facing the moving base. There is a gap between the first magnetic core and the second magnetic core. When a current is applied, the end of the first permanent magnet near the stator base has the opposite polarity to the end of the first magnetic core near the moving base, and the end of the first magnetic core near the moving base has the opposite polarity to the end of the second magnetic core near the moving base. In the open state, the first permanent magnet is directly opposite the gap between the first magnetic core and the second magnetic core.

5. The circuit breaker according to any one of claims 2-4, characterized in that, The circuit breaker also includes: A linkage assembly includes a first link, a second link, and a third link. The first link and the second link are both rotatably connected to the housing. The rotation axis of the first link relative to the housing is parallel to the rotation axis of the second link relative to the housing. One end of the third link is rotatably connected to the first link, and the other end is rotatably connected to the second link. The positions where the housing is rotatably connected to the first link and the positions where it is rotatably connected to the second link are located on the same side of the length direction of the third link. The length direction of the first link is parallel to the length direction of the second link. The rotation axis of the second connecting rod relative to the housing coincides with the rotation axis of the moving contact relative to the housing. The second connecting rod is rotatably connected to the moving contact, and the position where the moving contact is rotatably connected to the second connecting rod is located to the side of the position where the moving contact is rotatably connected to the housing. A spring is provided, with one end of the first link, the second link, and the third link connected to the spring, and the other end of the spring connected to the housing. In the closed state, the spring is used to drive the moving contact to press against the first stationary contact through the link assembly.

6. The circuit breaker according to claim 5, characterized in that, The position where the moving contact contacts the first stationary contact is the first contact point. There is a first time period between the closed state and the open state. During the first time period, the spring drives the first contact point to move away from the first stationary contact.

7. The circuit breaker according to claim 5 or 6, characterized in that, The linkage assembly also includes a rotating shaft, through which the first linkage and the third linkage are rotatably connected. One end of the spring is connected to the rotating shaft, and the other end is connected to the housing.

8. The circuit breaker according to claim 7, characterized in that, The position where the moving contact is rotatably connected to the second link is located on the side facing the first stationary contact, where the moving contact is rotatably connected to the housing. The spring is a tension spring, and the position where the housing connects to the spring and the position where the housing is rotatably connected to the first connecting rod are located on the same side of the length direction of the third connecting rod. In the closed state, the angle between the length direction of the spring and the length direction of the third link is smaller than the angle between the length direction of the first link and the length direction of the third link, and the moving contact contacts the side of the first stationary contact facing the rotating shaft.

9. The circuit breaker according to claim 8, characterized in that, In the open position, the angle between the length direction of the spring and the length direction of the third link is greater than the angle between the length directions of the first link and the third link.

10. The circuit breaker according to any one of claims 7-9, characterized in that, The linkage assembly further includes a fourth link, a fifth link, and a sixth link. All three links are located on the side of the moving contact opposite to the third link. The fourth and fifth links are rotatably connected to the housing. The rotation axis of the fourth link relative to the housing coincides with the rotation axis of the first link relative to the housing. The rotation axis of the fifth link relative to the housing coincides with the rotation axis of the second link relative to the housing. One end of the sixth link is rotatably connected to the fourth link via the rotation shaft, and the other end is rotatably connected to the fifth link. The positions where the housing rotatably connects to the fourth link and the fifth link are located on the same side of the length direction of the sixth link. The length direction of the fourth link is parallel to the length direction of the fifth link. The fifth link is rotatably connected to the moving contact, and its rotation axis relative to the moving contact coincides with the rotation axis of the second link relative to the moving contact.

11. The circuit breaker according to any one of claims 5-10, characterized in that, The circuit breaker includes a first pin, which is fixedly connected to the output shaft. The first pin passes through the moving contact, the second connecting rod, and the third connecting rod. The third connecting rod and the moving contact are rotatably connected to the second connecting rod through the first pin. The housing is provided with at least one first arc-shaped groove through which the first pin passes, and the first pin slides in fit with each of the first arc-shaped grooves.

12. The circuit breaker according to any one of claims 5-11, characterized in that, The housing includes a protective shell and a first side plate. The movable contact is located inside the protective shell and rotatably connected to the protective shell. The first side plate is located outside the protective shell and is distributed with the protective shell along the rotation axis of the movable contact relative to the protective shell. The first side plate is fixedly connected to the protective shell and there is a gap between the two. One of the first connecting rod and the third connecting rod is disposed in the gap between the first side plate and the protective shell, and the other is disposed on the side of the first side plate away from the protective shell. The second connecting rod and the first connecting rod are located on the same side of the first side plate.

13. The circuit breaker according to any one of claims 2-12, characterized in that, The housing has a first stop surface, which is disposed facing the first stationary contact. The position where the moving contact contacts the first stationary contact is the first contact point. There is a space between the first stop surface and the first stationary contact for the first contact point to move. The first stop surface is used to stop the moving contact.

14. The circuit breaker according to claim 1, characterized in that, The motor is a linear motor, and the stator is used to drive the mover to slide.

15. The circuit breaker according to claim 14, characterized in that, The stator includes a stator base and a first magnetic core. The mover includes a mover base and a first permanent magnet that are fixedly connected. The mover base is slidably connected to the stator base. The distribution direction of the stator base and the mover base is perpendicular to the sliding direction of the mover base. The first magnetic core is fixed to the wall surface of the stator base facing the mover base. The first permanent magnet is located on the side of the moving contact away from the first stationary contact. The first magnetic core is at least partially located on the side of the first permanent magnet facing the first stationary contact.

16. The circuit breaker according to claim 15, characterized in that, When current is applied, the end of the first magnetic core facing the moving base has the same polarity as the end of the first permanent magnet facing the stator base.

17. The circuit breaker according to claim 15 or 16, characterized in that, The mover also includes a second permanent magnet. In the closed state, the second permanent magnet is located on the side of the first magnetic core facing the first stationary contact, and the orthographic projection of the first magnetic core on the stator base partially overlaps with the orthographic projection of the first permanent magnet on the stator base. The end of the first permanent magnet facing the stator base has the opposite polarity to the end of the second permanent magnet facing the stator base.

18. The circuit breaker according to any one of claims 1-17, characterized in that, The circuit breaker also includes a circuit board and at least one capacitor, the at least one capacitor being disposed on the circuit board, the motor being electrically connected to the at least one capacitor, and the at least one capacitor being used for electrically connecting to a power source.

19. The circuit breaker according to any one of claims 1-18, characterized in that, The circuit breaker also includes a current transformer located outside the housing. The current transformer is disposed on the first stationary contact or the second stationary contact and is electrically connected to the motor.

20. An equipment cabinet, characterized in that, The circuit breaker includes a cabinet, a plurality of copper busbars, and at least one circuit breaker as described in any one of claims 1-19, wherein the plurality of copper busbars are disposed within the cabinet, and each of the first stationary contacts and each of the second stationary contacts is connected to the corresponding copper busbar.

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