Switching device and inverter

Abstract

The present application provides a switching device and an inverter. The switching device comprises a housing, an operating handle, an operating mechanism, a movable contact, a static contact, and a trip unit. The operating handle drives, by means of the operating mechanism, the movable contact to move so as to be brought into contact with or separated from the static contact. The operating mechanism comprises a latch assembly and a trip lever. When the latch assembly is in a first position, the latch assembly is engaged with the trip lever. When the latch assembly is in a second position, the latch assembly is disengaged from the trip lever. The trip unit comprises a coil winding, a first yoke, a second yoke, and a trip assembly. The trip assembly comprises a magnetic assembly and a drive component. Upon receiving a drive signal, the trip unit can rotate the latch assembly from the first position to the second position, so that the latch assembly is kept disengaged from the trip lever, causing the operating handle to trip from the operating mechanism and be unable to drive the movable contact to move, and as a result, the switching device cannot be closed, thereby improving the stability of the switching device in a tripped state.

Description

A switching device and an inverter

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411048519.7, filed on July 31, 2024, and entitled "A switching device and an inverter", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of electric power, and in particular to a switching device and an inverter. BACKGROUND

[0004] With the advent of electricity, switching electrical appliances play an important role in many production processes and technical equipment. Switching electrical appliances are used in power systems for power distribution, control and protection. For example, a rotary disconnector is a commonly used switching device in an electrical circuit. In the field of photovoltaic power generation, a rotary disconnector is usually composed of an operating mechanism, a multi-pole switching unit, a remote tripper, and the like.

[0005] In the photovoltaic power generation scenario, multiple photovoltaic panel leads are connected to the input end of a multi-channel controllable direct current switch (hereinafter referred to as "switch"). Due to the limitations of lead length, number, scene, and other site conditions, external faults inevitably occur in practice. In addition, internal faults of the inverter may also occur. At this time, the switch is opened under the action of the fault current signal. At this time, the controller needs to be detected to confirm the fault, and the magnetic flux integrated on the switch is used to automatically open the switch to ensure the safety of the line.

[0006] However, in actual application, users may not be able to obtain the reason for the tripping of the switch, and the manual tripping and closing operation is performed multiple times in the case where the fault current signal still exists, which leads to the failure of the switch. SUMMARY

[0007] The present application provides a switching device and an inverter to keep the operating handle of the switching device and the operating mechanism in a tripped state when a fault occurs, so that the switching device cannot be closed, thereby improving the stability of the switching device in the tripped state.

[0008] In a first aspect, the application provides a switch device. The switch device comprises a housing, an operating handle, an operating mechanism, a movable contact, a stationary contact and a trip device. Specifically, the operating handle is connected with the operating mechanism, and the operating mechanism is connected with the movable contact. The operating handle at least the part close to the operating mechanism, the operating mechanism, the movable contact, the stationary contact and the trip device are located in the housing. The operating mechanism comprises a lock assembly and a transmission assembly. The operating handle and the movable contact are respectively in transmission connection with the transmission assembly. The transmission assembly comprises a trip latch. The trip latch and the lock assembly are respectively relatively rotatable with the housing. When the lock assembly is in a first position, the lock assembly keeps in engagement with the trip latch, so that the operating handle can control the operating mechanism to drive the movable contact to move, thereby making the movable contact contact or separate from the stationary contact. When the lock assembly is in a second position, the lock assembly is disengaged from the trip latch, so that the operating handle is tripped from the transmission assembly, and the operating handle cannot control the operating mechanism to drive the movable contact, and the movable contact keeps in a separated state from the stationary contact. The trip device comprises a coil winding, a first magnetic yoke, a second magnetic yoke and a trip assembly. The coil winding is fixed relative to the housing. The first magnetic yoke and the second magnetic yoke are oppositely arranged at two ends of the coil winding. The trip assembly comprises a magnetic assembly and a driving part fixedly connected. The magnetic assembly is located between the first magnetic yoke and the second magnetic yoke, and the magnetic assembly comprises a first magnetic pole part and a second magnetic pole part, which are oppositely arranged and have opposite magnetic poles. The first magnetic yoke extends to between the first magnetic pole part and the second magnetic pole part from one end away from the coil winding. The second magnetic yoke extends to between the first magnetic pole part and the second magnetic pole part from one end away from the coil winding. The driving part is in transmission connection with the lock assembly, so that the lock assembly rotates between the first position and the second position. The trip device is used for, according to a driving signal, making the coil winding be electrified and generating a first induced magnetic field, so that the first magnetic yoke generates an attractive force to the first magnetic pole part and a repulsive force to the second magnetic pole part; and the second magnetic yoke generates a repulsive force to the first magnetic pole part and an attractive force to the second magnetic pole part, to drive the magnetic assembly to rotate in a first rotation direction and drive the driving part to move, thereby making the lock assembly rotate from the first position to the second position, so that the lock assembly is disengaged from the trip latch and keeps in a disengaged state.

[0009] The switch device of the present application can be applied to an inverter for conducting or disconnecting the electrical connection between the inverter circuit of the inverter and the photovoltaic module. When a fault occurs outside or inside the inverter, the controller of the inverter can send a driving signal to the switch device, so that the switch device trips. In the process of tripping of the switch device, inside the switch device, the trip device rotates the locking assembly from the first position to the second position by driving the locking assembly, so that the locking assembly is separated from the trip of the transmission assembly, so that the transmission assembly is tripped from the operating handle, and the moving contact and the stationary contact are separated. In this way, the switch device remains in the tripped state, and the operating handle cannot control the operating mechanism to move the moving contact, so that the moving contact and the stationary contact remain in the separated state. Therefore, when a fault occurs outside or inside the inverter, even if the operating handle is operated, the trip device will separate the locking assembly from the trip, so that the operating mechanism cannot move the moving contact, resulting in that the switch device cannot be closed, thereby improving the stability of the switch device in the tripped state.

[0010] In one possible implementation, the trip device is further configured to, according to the reset signal, energize the coil winding and generate a second induced magnetic field to generate repulsive force on the first magnetic pole part and attractive force on the second magnetic pole part of the first magnetic yoke; and generate attractive force on the first magnetic pole part and repulsive force on the second magnetic pole part of the second magnetic yoke, to drive the magnetic assembly to rotate in the second rotation direction and reset the driving part, so that the locking assembly can be reset from the second position to the first position to lock the trip of the locking assembly when the operating handle moves the operating mechanism. In this technical solution, the controller of the inverter can send a reset signal to the switch device, so that the trip device resets. In this way, the locking assembly can be reset to the first position and remain in the first position. Therefore, when the operating handle moves the operating mechanism, the trip can be engaged with the locking assembly, so that the closing and opening of the switch device can be realized by the operating handle, thereby improving the stability of the switch device in the normal working state. By changing the current direction of the coil winding when energized, the stability of the switch device in the tripped state and the normal working state can be realized, thereby realizing the bistable state of the switch device.

[0011] The switch device is applied to an inverter, and is used to turn on or turn off the electrical connection between the inverter circuit of the inverter and the photovoltaic module. The switch device receives a driving signal when an external fault or an internal fault of the inverter occurs. When an internal fault of the inverter occurs, the switch device receives a reset signal after the fault is solved. When an external fault of the inverter occurs, the switch device receives the reset signal before the fault is solved. The internal fault of the inverter can be caused by a fault of an internal device of the inverter itself, including but not limited to an overvoltage fault, an overcurrent fault, a breakdown fault and the like, and thus the internal fault of the inverter needs to be solved by a professional maintenance personnel instead of being checked by a user. The external fault of the inverter can be caused by an external environmental fault of the inverter. The external environmental fault of the inverter can occur in the inverter or outside the inverter, and is regarded as an external fault of the inverter in the present application. The external fault of the inverter can be checked and solved by the user or the system. Therefore, when the internal fault of the inverter occurs, the controller of the inverter sends the reset signal to the switch device only after the fault is solved, so that the switch device can be closed by the user without solving the fault, and the inverter can be prevented from being damaged. When the external fault of the inverter occurs, the controller of the inverter can send the reset signal to the switch device before the fault is solved. Thus, the switch device can be normally closed and opened by the user or the system after the self-checking.

[0012] In the above trip assembly, the driving component is used to rotate the locking assembly. In one possible implementation, the driving component includes a rotating rod and a push rod. The rotating rod is relatively rotatable with the housing, the rotating rod is fixedly connected with the magnetic assembly, and the rotating rod is movably connected with the push rod. The push rod is slidably connected with the housing. The magnetic assembly is used to drive the rotating rod to rotate, so as to drive the push rod to move towards the locking assembly and abut against the locking assembly, thereby driving the locking assembly to rotate from the first position to the second position, and to drive the push rod to move away from the locking assembly and disengage from the locking assembly, so that the locking assembly can be reset from the second position to the first position. In this technical solution, the induced magnetic field generated by the coil winding acts on the first magnetic pole part and the second magnetic pole part through the first magnetic yoke and the second magnetic yoke, so as to drive the magnetic assembly to move. In the movement process of the magnetic assembly, the rotating rod rotates with the magnetic assembly, and drives the push rod to slide, that is, the rotating motion is converted into the sliding motion, so that the push rod moves towards or away from the locking assembly.

[0013] The movable connection between the push rod and the rotating rod can be achieved by simple structural design. In one possible implementation, the push rod has an opening, and the rotating rod has a protrusion. The protrusion is accommodated in the opening, and the movable connection between the push rod and the rotating rod is achieved by rotation in the opening.

[0014] In a possible implementation, the locking assembly is further provided with a reset member for driving the locking assembly to reset from the second position to the first position so as to buckle the locking assembly with the jumper when the operating handle drives the operating mechanism to move. In this way, after the operating handle is disengaged from the locking assembly, the locking assembly can be reset under the action of the reset member, thereby waiting for the locking assembly to buckle with the jumper again in the first position, so that the switch device can be closed and opened.

[0015] In another possible implementation, the driving member comprises a rotating rod. The rotating rod is relatively rotatable with the housing, and the rotating rod is fixedly connected with the magnetic assembly. The rotating rod is relatively fixed with the locking assembly. The magnetic assembly is used to drive the rotating rod to rotate, so as to drive the locking assembly to rotate from the first position to the second position, and to drive the locking assembly to rotate from the second position to the first position. In this technical solution, the induced magnetic field generated by the coil winding acts on the first magnetic pole part and the second magnetic pole part through the first magnetic yoke and the second magnetic yoke, so as to drive the magnetic assembly to move. In the movement process of the magnetic assembly, the rotating rod rotates with the magnetic assembly, and directly drives the locking assembly to rotate, so as to directly drive the locking assembly to rotate between the first position and the second position.

[0016] In the technical solution of the present application, the shapes of the first magnetic yoke and the second magnetic yoke are not specifically limited, for example, can be L-shaped, U-shaped or other bent shapes. In a possible implementation, the shapes of the first magnetic yoke and the second magnetic yoke are L-shaped respectively, thereby facilitating the miniaturization of the tripping device. Specifically, the coil winding comprises a connecting shaft and a coil wound around the outer periphery of the connecting shaft. The first magnetic yoke and the second magnetic yoke are respectively connected to two ends of the connecting shaft. A part of the first magnetic yoke close to the connecting shaft is perpendicular to the axial direction of the connecting shaft, and another part of the first magnetic yoke away from the connecting shaft is parallel to the axial direction of the connecting shaft. A part of the second magnetic yoke close to the connecting shaft is perpendicular to the axial direction of the connecting shaft, and another part of the second magnetic yoke away from the connecting shaft is parallel to the axial direction of the connecting shaft. The other part of the first magnetic yoke and the other part of the second magnetic yoke are oppositely arranged and extend between the first magnetic pole part and the second magnetic pole part. In this way, the other part of the first magnetic yoke and the other part of the second magnetic yoke not only can attract and repel the first magnetic pole part and the second magnetic pole part of the magnetic assembly, but also can limit the rotation angle of the first magnetic pole part and the second magnetic pole part, so as to limit the movement stroke of the driving member.

[0017] The specific structure of the magnetic assembly of the present application is not limited. In one possible implementation, the magnetic assembly can include a permanent magnet, a first magnetic conducting plate, and a second magnetic conducting plate, the first magnetic conducting plate and the second magnetic conducting plate being oppositely arranged on two sides of the permanent magnet. The permanent magnet magnetically attracts the first magnetic conducting plate and the second magnetic conducting plate. In this technical solution, the first magnetic conducting plate is a first magnetic pole part, and the second magnetic conducting plate is a second magnetic pole part. In another possible implementation, the magnetic assembly can include an I-shaped permanent magnet. The I-shaped permanent magnet includes an integral structure of a middle connecting part, the first magnetic pole part, and the second magnetic pole part. The middle connecting part is connected between the first magnetic pole part and the second magnetic pole part. In another possible implementation, the magnetic assembly can also include two separable T-shaped magnets, the two T-shaped magnets being identical in shape and opposite in magnetic circuit direction, the two T-shaped magnets magnetically attracting and forming an I-shaped magnetic assembly. The first magnetic pole part is an end part of one of the two T-shaped magnets, and the second magnetic pole part is an end part of the other of the two T-shaped magnets.

[0018] In one possible implementation, the locking assembly includes a pulling rod and a locking rod, the pulling rod and the locking rod being rotatably connected with the housing respectively, the pulling rod being located on a side of the locking rod away from the jumper. The locking rod is used to be buckled with or unbuckled from the jumper. When the locking assembly is in the first position, a first surface of the pulling rod abuts against the locking rod and makes the locking rod buckle with the jumper. When the locking assembly is in the second position, a second surface of the pulling rod abuts against the locking rod and makes the locking rod unbuckle from the jumper. When the locking assembly rotates from the first position to the second position, the locking rod slides from the first surface to the second surface of the pulling rod. When the locking assembly resets from the second position to the first position, the locking rod slides from the second surface to the first surface of the pulling rod. By changing the surface of the pulling rod abutting against the locking rod, the locking rod can buckle with or unbuckle from the jumper, and in actual application, the pulling rod can be rotated to achieve this.

[0019] The specific type of the switch device of the present application is not limited, for example, the switch device can include a circuit breaker, a disconnector, or other circuit switch.

[0020] In one possible implementation, the switch device includes a plurality of moving contacts and a plurality of static contacts, the number of the plurality of moving contacts and the number of the plurality of static contacts being equal and one-to-one corresponding arrangement, the plurality of moving contacts being respectively in transmission connection with the transmission assembly. A single moving contact and a corresponding static contact can form a layer of contact assembly and be used to conduct or disconnect a branch. The switch device of this technical solution can be applied to a plurality of branches in a circuit.

[0021] In a second aspect, the application provides an inverter. The inverter comprises an inverter circuit, a controller and the switching device of the first aspect. The inverter circuit is electrically connected with the photovoltaic module through the switching device. The switching device is used to turn on or turn off the electrical connection between the photovoltaic module and the inverter circuit. The controller is electrically connected with the switching device. The controller is used to send a driving signal to the switching device when the inverter fails. The trip device of the switching device is used to decouple the operating handle from the operating mechanism according to the driving signal, so that the operating handle cannot control the operating mechanism to drive the movable contact, so as to keep the movable contact and the static contact separated, thereby turning off the electrical connection between the photovoltaic module and the inverter circuit.

[0022] When the inverter fails externally or internally, the switching device trips. In the process of tripping the switching device, the trip device decouples the locking assembly from the jump buckle by driving the locking assembly, so that the operating mechanism is decoupled from the operating handle and the movable contact and the static contact are separated. Since the trip device drives the locking assembly to remain in the second position, even if the operating handle is operated, the trip device will decouple the locking assembly from the jump buckle, so that the operating mechanism cannot drive the movable contact to move, resulting in that the switching device cannot be closed, and the electrical connection between the photovoltaic module and the inverter circuit is kept off, thereby improving the safety of the inverter.

[0023] In a possible implementation, the controller is further configured to send a reset signal to the switching device. The trip device of the switching device is configured to enable the operating handle to control the operating mechanism to drive the movable contact to move, so that the movable contact and the static contact are in contact or separated, thereby turning on or turning off the electrical connection between the photovoltaic module and the inverter circuit. In this technical solution, the controller of the inverter can send a reset signal to the switching device, so that the trip device is reset. In this way, the locking assembly can be reset to the first position and remain in the first position. Therefore, when the operating handle drives the operating mechanism to move, the jump buckle can be buckled with the locking assembly, so that the closing and opening of the switching device can be realized through the operating handle, thereby improving the stability of the switching device in the normal working state.

[0024] In the above inverter, when a fault occurs outside the inverter, the controller is configured to send a reset signal to the switching device before the fault is resolved. When a fault occurs inside the inverter, the controller is configured to send a reset signal to the switching device after the fault is resolved. The fault occurring inside the inverter can be caused by a fault of the inverter internal equipment itself, including but not limited to overvoltage fault, overcurrent fault, breakdown fault, etc., so that the fault occurring inside the inverter needs to be resolved by professional maintenance personnel, and cannot be completed by user inspection only. The fault occurring outside the inverter can be caused by a fault of the inverter external environment. Among them, the fault caused by the inverter external environment can occur inside the inverter or outside the inverter, which is regarded as a fault occurring outside the inverter in the present application. The fault occurring outside the inverter can be resolved by user or system inspection. Therefore, when a fault occurs inside the inverter, the controller of the inverter sends a reset signal to the switching device only after the fault is resolved, so that the inverter can be prevented from being damaged due to the user closing the switching device without resolving the fault. When a fault occurs outside the inverter, the controller of the inverter can send a reset signal to the switching device before the fault is resolved. In this way, the user can normally close and open the switching device after inspection or system self-checking. BRIEF DESCRIPTION OF DRAWINGS

[0025] FIG. 1 is a schematic diagram of an application scenario of a power system according to an embodiment of the present application;

[0026] FIG. 2 is a partial schematic diagram of a power system in the dashed box in FIG. 1;

[0027] FIG. 3 is a schematic diagram of a switching device according to an embodiment of the present application;

[0028] FIG. 4 is a schematic diagram of a switching device according to an embodiment of the present application;

[0029] FIG. 5 is another schematic diagram of a switching device according to an embodiment of the present application;

[0030] FIG. 6 is an exploded schematic diagram of a switching device according to an embodiment of the present application;

[0031] FIG. 7 is a schematic diagram of the cooperation of a traction rod and a locking rod according to an embodiment of the present application;

[0032] FIG. 8 is a schematic diagram of the cooperation of a traction rod, a locking rod and a jumper according to an embodiment of the present application;

[0033] FIG. 9 is a schematic diagram of a traction rod, a locking rod and a jumper when a locking assembly is in a first position according to an embodiment of the present application;

[0034] FIG. 10 is a schematic diagram of a traction rod, a locking rod and a jumper when a locking assembly is in a second position according to an embodiment of the present application;

[0035] Fig. 11 is an exploded view of the operating mechanism according to an embodiment of the application;

[0036] Fig. 12 is another schematic view of the draw bar, the catch bar and the transmission mechanism according to an embodiment of the application;

[0037] Fig. 13 is a partial view of the switch device of Fig. 12;

[0038] Fig. 14 is an exploded view of the operating mechanism and the movable contact according to an embodiment of the application;

[0039] Fig. 15 is a schematic view of the switch device according to an embodiment of the application in an open state;

[0040] Fig. 16 is a partial view of the switch device of Fig. 15;

[0041] Fig. 17 is a schematic view of the switch device according to an embodiment of the application in a tripped state;

[0042] Fig. 18 is a partial view of the switch device of Fig. 17;

[0043] Fig. 19 is a schematic view of the release according to an embodiment of the application;

[0044] Fig. 20 is a schematic view of the release according to an embodiment of the application in an energized state;

[0045] Fig. 21 is another schematic view of the release according to an embodiment of the application in an energized state;

[0046] Fig. 22 is another schematic view of the switch device according to an embodiment of the application;

[0047] Fig. 23 is a schematic view of the release of Fig. 22;

[0048] Fig. 24 is another schematic view of the release of Fig. 22.

[0049] Reference numerals: 10-photovoltaic power generation system 20-power system 21-controller 30-switching device 31-operation handle 32-operation mechanism 33-contact assembly 34-trip unit 311-knob 321-pulling rod 322-locking rod 323-first mounting plate 324-second mounting plate 325-spring 326-driving crank 331-moving contact 341-coil winding 342-driving assembly 343-first magnetic yoke 344-second magnetic yoke 3221-groove 3222-hook 3231-first sliding groove 3241-second sliding groove 3411-connection shaft 3412-coil 3421-magnetic assembly 3422-driving part 34211-first magnetic pole part 34212-second magnetic pole part 34213-permanent magnet 34214-first magnetic conducting plate 34215-second magnetic conducting plate 34221-rotating rod 34222-pushing rod 34223-opening S1-first surface S2-second surface COD-input crank DF-input connecting rod FG-rocker HE-snap HJ-upper connecting rod JK-lower connecting rod KO’L’-output crank LL’-output shaft DETAILED DESCRIPTION

[0050] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0051] For the convenience of understanding the switching device and the inverter provided in the embodiments of the present application, the application scenarios thereof are described as follows. The switching device and the inverter provided in the embodiments of the present application can be widely applied in various power supply and distribution systems. In an example provided in the present application, the inverter can be applied in a photovoltaic power generation system, which is a system for generating electricity by using solar energy. The photovoltaic power generation system converts solar energy into electric energy, and provides clean and renewable energy for people. FIG. 1 is a schematic diagram of an application scenario of a power system provided in the embodiments of the present application, and FIG. 2 is a partial schematic diagram of an electric power system in the dotted frame in FIG. 1. As shown in FIG. 1 and FIG. 2, the photovoltaic power generation system 10 includes an energy storage system and a photovoltaic assembly. The photovoltaic assembly includes a plurality of photovoltaic cell panel groups connected in series. The photovoltaic cell panel groups convert solar energy into direct current through photovoltaic effect. The inverter converts the direct current output by the photovoltaic assembly into alternating current, and further transmits the alternating current to a box-type substation. The box-type substation converts the low-voltage alternating current output by the inverter into medium-voltage alternating current, and further transmits the alternating current to a booster station, a power grid or a box-type substation corresponding to the energy storage system. The energy storage system is used for storing unstable electric energy from the photovoltaic assembly. The energy storage system includes a plurality of battery clusters connected in parallel. The battery clusters output stable electric energy to the power grid through an energy storage converter and a corresponding box-type substation. The power system 20 includes a photovoltaic assembly and an inverter. In the power system 20, the inverter includes an inverter circuit, a controller 21 and a switching device 30. The inverter circuit is electrically connected to the photovoltaic assembly through the switching device 30. The switching device 30 is used for turning on or turning off the electrical connection between the photovoltaic assembly and the inverter circuit. When the battery cluster or the photovoltaic cell panel group needs to be maintained, repaired or replaced, the electrical connection between the photovoltaic assembly and the inverter circuit can be turned off by turning off the switching device 30. In this way, it can be ensured that the personnel and the inverter will not be in danger when the power system 20 is maintained and repaired. In addition, the switching device 30 can also be used for adjusting and controlling the photovoltaic power generation system 10. The controller 21 is electrically connected to the switching device 30, and the controller 21 is used for controlling the switching device 30 to turn on and turn off.

[0052] The switch device 30 of the present application can be applied to multiple circuits. In one embodiment, the switch device 30 comprises an operating handle, an operating mechanism, a plurality of moving contacts and a plurality of stationary contacts, the operating handle is in transmission connection with the operating mechanism, the number of the plurality of moving contacts is equal to the number of the plurality of stationary contacts and the plurality of moving contacts and the plurality of stationary contacts are arranged one by one in correspondence, and the plurality of moving contacts are respectively in transmission connection with the operating mechanism. A single moving contact and a corresponding stationary contact can form a layer of contact assembly and be used to turn on or turn off a circuit. FIG. 3 is a schematic diagram of a switch device provided by an embodiment of the present application. As shown in FIG. 3, in one embodiment, the switch device 30 can be a rotary disconnecting switch, and the rotary disconnecting switch comprises multiple layers of contact assemblies. For example, the power system 20 comprises 14 strings of photovoltaic cell panel strings, and the 14 strings of photovoltaic cell panel strings are connected with the rotary disconnecting switch. The rotary disconnecting switch comprises at least 12 layers of contact assemblies, and each contact assembly comprises a pair of moving contact and stationary contact. The stationary contacts of the multiple layers of contact assemblies are installed in a form of mutual insertion and stacking through a connecting mechanism. When the operating handle is rotated, the operating handle can drive the operating mechanism to move, so that the operating mechanism drives the moving contact in each layer of contact assembly to move and contact or separate from the stationary contact layer by layer, achieving the effect of synchronous movement.

[0053] As shown in FIG. 2, when a fault occurs outside the inverter or inside the inverter, the controller 21 generates a drive signal and sends it to the switch device 30, wherein the drive signal can be a trip command sent by the controller 21 or a change in the current parameter. When the switch device 30 receives the drive signal, the switch device 30 performs a tripping action (i.e., the switch device 30 is tripped and the operating handle cannot perform a closing operation), and the photovoltaic module and the inverter circuit at both ends of the switch device 30 are disconnected. At this time, the operating mechanism in the switch device 30 is tripped from the operating handle, and the operating handle cannot perform a closing operation. Since the manual driving of the operating handle can make the operating handle and the operating mechanism retransmission connection, before the fault is solved, the manual operation of the operating handle can briefly close the switch device 30.

[0054] However, since the fault has not been solved, the switch device will trip again after a brief closing, and multiple closing operations can easily damage the switch device, leading to the failure of the switch device and affecting the safety and voltage output stability of the inverter.

[0055] In view of this, the present application provides a switch device and an inverter to keep the operating handle of the switch device and the operating mechanism in a tripped state when a fault occurs, so that the switch device cannot be closed, thereby improving the stability of the switch device in the tripped state.

[0056] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0057] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" or "in other embodiments" or "in still other embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, but can refer to different embodiments. Furthermore, the terms "comprise," "have," "include," and "contain" or variations thereof, do not preclude the presence or addition of one or more other features, structures, or characteristics not expressly listed or inherent in a particular embodiment. As used in this specification, the term "or" means "and / or" unless stated otherwise.

[0058] Figure 4 is a schematic diagram of a switch device according to an embodiment of the present application, Figure 5 is another schematic diagram of a switch device according to an embodiment of the present application, and Figure 6 is an exploded schematic diagram of a switch device according to an embodiment of the present application. As shown in Figures 4, 5 and 6, the switch device 30 comprises a housing (not shown in the figures), an operating handle 31, an operating mechanism 32, a contact assembly 33 and a trip unit 34, wherein the operating handle 31 is in transmission connection with the operating mechanism 32. The contact assembly 33 comprises a movable contact 331 and a stationary contact, and the operating mechanism 32 is connected with the movable contact 331. The part of the operating handle 31 at least close to the operating mechanism 32, the operating mechanism 32, the contact assembly 33 and the trip unit 34 are located in the housing. The operating handle 31 is used to control the operating mechanism 32 to drive the movable contact 331 to move, so that the movable contact 331 can be in contact with or separated from the stationary contact. In an embodiment, the end of the operating handle 31 away from the operating mechanism 32 can extend out of the housing, so that the operating handle 31 can be pushed by the staff to perform closing and opening operations. As shown in Figure 3, in another embodiment, a knob 311 is arranged on the outer surface of the housing, so that the closing and opening of the switch device 30 can be realized by knob operation. Specifically, the end of the operating handle 31 away from the operating mechanism 32 extends out of the housing and is connected with the knob 311. When the staff performs knob operation, the knob 311 is rotated and drives the operating handle 31 to move. In another embodiment, the switch device 30 can further comprise a remote controller and an electric operating device, wherein the electric operating device is connected with the operating handle 31 and the remote controller, so that the closing and opening of the switch device 30 can be realized by electric operation. When the staff performs electric operation, the remote controller sends a closing instruction or an opening instruction, and the remote controller can control the electric operating device to drive the operating handle 31 to move. In this embodiment, the staff can issue the instruction close to the switch device 30, or can issue the instruction remotely through a communication device.

[0059] As shown in Figure 6, the operating mechanism 32 comprises a lock catch assembly and a transmission assembly. The lock catch assembly comprises a traction rod 321 and a lock catch rod 322. The transmission assembly comprises a trip hook HE. The traction rod 321 and the lock catch rod 322 are arranged close to the transmission assembly, and the traction rod 321 and the lock catch rod 322 are respectively rotatable relative to the housing. That is, the rotation center A of the traction rod 321 and the rotation center B of the lock catch rod 322 do not overlap. The lock catch rod 322 is used to be buckled or separated from the trip hook HE.

[0060] Figure 7 is a cooperation schematic diagram of the traction rod and the lock catch rod according to an embodiment of the present application, and Figure 8 is a cooperation schematic diagram of the traction rod, the lock catch rod and the trip hook according to an embodiment of the present application. As shown in Figures 7 and 8, the lock catch rod 322 is provided with a recess 3221. The side of the trip hook HE close to the lock catch rod 322 is provided with a hook 3222. The hook 3222 can hook the recess 3221, so as to realize the buckling of the lock catch rod 322 and the trip hook HE.

[0061] FIG. 9 is a schematic view of the towing bar, the locking bar and the jumper in the first position of the locking assembly according to an embodiment of the present application. As shown in FIG. 9, when the locking assembly is in the first position, the first surface S1 of the towing bar 321 abuts against the locking bar 322, so that the locking bar 322 is kept in engagement with the jumper HE. FIG. 10 is a schematic view of the towing bar, the locking bar and the jumper in the second position of the locking assembly according to an embodiment of the present application. As shown in FIG. 10, when the locking assembly is in the second position, the second surface S2 of the towing bar 321 abuts against the locking bar 322, so that the locking bar 322 is disengaged from the jumper HE. The first surface S1 and the second surface S2 of the towing bar 321 are arranged adjacently. The tripper 34 drives the towing bar 321 to rotate counterclockwise about point A, so that the locking assembly is rotated from the first position to the second position. In the process of rotating the locking assembly from the first position to the second position, the towing bar 321 drives the locking bar 322 to rotate counterclockwise about point B, and the locking bar 322 slides from the first surface S1 to the second surface S2 of the towing bar 321, so that the locking bar 322 is disengaged from the jumper HE.

[0062] FIG. 11 is an exploded schematic view of the operating mechanism according to an embodiment of the present application. As shown in FIG. 6 and FIG. 11, the operating mechanism 32 further comprises a first mounting plate 323 and a second mounting plate 324. The transmission assembly further comprises an input crank COD, an input link DF, a rocker arm FG, an upper link HJ, a lower link JK, an output crank KO’L’, an output shaft LL’ (not shown in the figure) and a spring 325. The first mounting plate 323 and the second mounting plate 324 are arranged oppositely, and the first mounting plate 323 and the second mounting plate 324 are fixed to the housing respectively. The operating handle 31 penetrates through the first mounting plate 323 and the second mounting plate 324, and one end of the operating handle 31 is located on the side of the first mounting plate 323 away from the second mounting plate 324. The input crank COD and the input link DF are both located on the side of the first mounting plate 323 away from the second mounting plate 324. The jumper HE, the rocker arm FG, the upper link HJ, the lower link JK and the output crank KO’L’ are all located between the first mounting plate 323 and the second mounting plate 324.

[0063] FIG. 12 is another schematic view of the towing bar, the locking bar and the transmission mechanism according to an embodiment of the present application. As shown in FIG. 12, specifically, the operating handle 31 can be rotated clockwise or counterclockwise relative to the first mounting plate 323. The input crank COD is sleeved on the operating handle 31, and the input crank COD is fixedly connected with the operating handle 31. In this way, when the operating handle 31 is rotated, the input crank COD can rotate with the operating handle 31 about point O. One end of the input link DF is rotatably connected with the input crank COD at point D, and the other end of the input link DF is rotatably connected with the rocker arm FG at point F. The rocker arm FG is rotatably connected with the first mounting plate 323 and the second mounting plate 324 at point G respectively, so that the rocker arm FG can rotate relative to the first mounting plate 323 and the second mounting plate 324 about point G.

[0064] Fig. 13 is a partial schematic view of the switch device in Fig. 12. As shown in Figs. 12 and 13, the jumper HE is pivotally connected to the first mounting plate 323 and the second mounting plate 324 at point E, respectively, so that the jumper HE can pivot relative to the first mounting plate 323 and the second mounting plate 324 about point E. The jumper HE is pivotally connected to one end of the upper link HJ at point H. The other end of the upper link HJ is pivotally connected to one end of the lower link JK at point J. The other end of the lower link JK is pivotally connected to the output crank KO’L’ at point K. The output crank KO’L’ is coaxially arranged with the operating handle 31, and the output crank KO’L’ can pivot relative to the second mounting plate 324 about point O’. The output shaft LL’ is fixedly connected to the output crank KO’L’ at point L. The first mounting plate 323 is provided with a first sliding slot 3231, and the second mounting plate 324 is provided with a second sliding slot 3241. The output shaft LL’ passes through the first sliding slot 3231 and the second sliding slot 3241, and the output shaft LL’ can simultaneously slide in the first sliding slot 3231 and the second sliding slot 3241. One end of the spring 325 is fixedly connected to the rocker arm FG at point P. The upper link HJ and the lower link JK are pivotally connected at point J by a pivot shaft, and the other end of the spring 325 can be fixedly connected to the pivot shaft at point J.

[0065] Fig. 14 is an exploded schematic view of the operating mechanism and the movable contact provided in the embodiment. As shown in Figs. 10 and 14, the operating mechanism 32 further includes a drive crank 326, which is located on the side of the second mounting plate 324 away from the first mounting plate 323. The drive crank 326 is coaxially arranged with the operating handle 31, and the drive crank 326 can pivot relative to the second mounting plate 324 about point O’. One end of the output shaft LL’ passes through the second sliding slot 3241 and is fixedly connected to the drive crank 326, so that when the output shaft LL’ slides in the second sliding slot 3241, the drive crank 326 follows the output shaft LL’ to pivot about point O’. The drive crank 326 is fixedly connected to the movable contact 331, so that the drive crank 326 can drive the movable contact 331 to pivot.

[0066] In one embodiment, the pulling rod 321 is provided with a reset member, which is used to drive the locking assembly to pivot from the second position to the first position, so that the locking rod 322 is buckled with the pulling rod 321 when the operating handle 31 drives the operating mechanism 32 to move. In this way, after the tripping device 34 is separated from the pulling rod 321, the locking assembly can be reset to the first position under the action of the reset member, so as to wait for the locking rod 322 to be buckled with the jumper again, so that the switch device 30 can be closed and opened.

[0067] The closing, opening and tripping of the switch device 30 will be described in detail below.

[0068] As shown in FIGS. 12 and 13, the switch device 30 is in the closed state, and the moving contact 331 and the stationary contact are in contact. At this time, the locking assembly is in the first position, and the hook 3222 hooks the groove 3221, so that the locking lever 322 is buckled with the jumper HE. In this way, the jumper HE is kept stationary. One end of the spring 325 is at the P point, and the P point is on the right side of the upper link HJ, and the other end of the spring 325 is at the J point, so that the spring 325 exerts a rightward force on the rotation axis of the J point. If the rocker arm FG continues to rotate clockwise around the G point from the position in FIG. 13, the P point can continue to move to the right. In this case, the lower link JK has a tendency to move clockwise under the action of the spring 325, i.e., the K point has a tendency to move clockwise around O', so that the output crank KO' L' has a tendency to rotate clockwise around the O' point. However, the first sliding groove 3231 and the second sliding groove 3241 limit the rotation of the output shaft LL', thereby limiting the movement of the output crank KO' L', the lower link JK, the upper link HJ, and the rocker arm FG in turn, and further causing the rocker arm FG to remain in the position in FIG. 13, keeping the closed state of the switch device 30.

[0069] FIG. 15 is a schematic view of the switch device in the open state according to an embodiment of the present application, and FIG. 16 is a partial schematic view of the switch device in FIG. 15. As shown in FIGS. 15 and 16, the switch device 30 is in the open state, and the moving contact 331 and the stationary contact are separated. At this time, the locking assembly is in the first position, and the hook 3222 hooks the groove 3221, so that the locking lever 322 is buckled with the jumper HE. In this way, the jumper HE is kept stationary. When the switch device 30 is switched from the closed state to the open state, the operating handle 31 rotates counterclockwise around the O point, thereby driving the input crank COD to rotate counterclockwise around the O point following the operating handle 31. In the process of counterclockwise rotation of the input crank COD, the D point moves to the right and the F point moves to the right and upward, thereby driving the rocker arm FG to rotate counterclockwise around the G point. In the process of counterclockwise rotation of the rocker arm FG around the G point, the P point of the spring 325 moves from the right side of the upper link HJ to the left side of the upper link HJ. When the P point is on the left side of the upper link HJ, the spring 325 exerts a leftward force on the rotation axis of the J point, thereby driving the J point to move to the left and upward, and further driving the lower link JK to rotate counterclockwise. In the process of counterclockwise rotation of the lower link JK, the output crank KO' L' rotates clockwise around the O' point, thereby causing the moving contact 331 to rotate clockwise and separate from the stationary contact.

[0070] When the switch device 30 is switched from the open state to the closed state, the operating handle 31 rotates clockwise around the O point, thereby driving the input crank COD to rotate clockwise around the O point following the operating handle 31. In the process of the clockwise rotation of the input crank COD, the D point moves leftward and drives the F point to move leftward and downward, thereby driving the rocker arm FG to rotate clockwise around the G point. In the process of the clockwise rotation of the rocker arm FG around the G point, the P point of the spring 325 moves from the left side of the upper connecting rod HJ to the right side of the upper connecting rod HJ. When the P point is located at the right side of the upper connecting rod HJ, the spring 325 exerts a rightward force on the rotation shaft of the J point, thereby driving the J point to move rightward and downward, and further driving the lower connecting rod JK to rotate clockwise. In the process of the clockwise rotation of the lower connecting rod JK, the output crank KO’L’ rotates counterclockwise around the O’ point, thereby driving the movable contact 331 to rotate counterclockwise and contact the static contact.

[0071] FIG. 17 is a schematic view of the switch device in a tripped state according to an embodiment of the present application, and FIG. 18 is a partial schematic view of the switch device in FIG. 17. As shown in FIGS. 17 and 18, the switch device 30 is in the tripped state, and the movable contact 331 and the static contact are separated. At this time, the locking assembly is located at the second position, and the hook 3222 is disengaged from the groove 3221, so that the locking lever 322 is disengaged from the trip lever HE. When the switch device 30 is switched from the closed state to the tripped state, the trip device 34 drives the pulling lever 321 to rotate counterclockwise around the A point, thereby reducing the force of the pulling lever 321 abutting against the locking lever 322, so that the locking lever 322 rotates counterclockwise around the B point, and further so that the locking lever 322 is disengaged from the trip lever HE. At the moment when the trip lever HE is disengaged from the locking lever 322, the trip lever HE rotates clockwise around the E point, thereby driving the H point to move rightward. In the process of the clockwise rotation of the trip lever HE, the upper connecting rod HJ is driven to rotate clockwise, thereby driving the J point to move leftward and upward, and further driving the lower connecting rod JK to rotate counterclockwise. In the process of the counterclockwise rotation of the lower connecting rod JK, the output crank KO’L’ rotates clockwise around the O’ point, thereby driving the movable contact 331 to rotate clockwise and separate from the static contact, so as to realize the tripping of the switch device 30.

[0072] Fig. 19 is a schematic view of a trip unit according to an embodiment of the present application. As shown in Fig. 19, the trip unit 34 includes a coil winding 341, a trip assembly 342, a first magnetic yoke 343 and a second magnetic yoke 344. The coil winding 341 is configured to generate an induced magnetic field, which is configured to drive the trip assembly 342 to move through the first magnetic yoke 343 and the second magnetic yoke 344. The coil winding 341 is fixedly connected to the housing. Specifically, the coil winding 341 can be fixedly connected to the housing, or the coil winding 341 can be fixedly connected to the first mounting plate 323 and the second mounting plate 324 of the operating mechanism 32. The coil winding 341 includes a connecting shaft 3411 and a coil 3412. The coil 3412 is arranged around the outer periphery of the connecting shaft 3411. The first magnetic yoke 343 and the second magnetic yoke 344 are arranged at opposite ends of the connecting shaft 3411. The trip assembly 342 is arranged between the coil winding 341 and the operating mechanism 32. The trip assembly 342 includes a magnetic assembly 3421 and a driving component 3422. The magnetic assembly 3421 is fixedly connected to the driving component 3422. The magnetic assembly 3421 includes a first magnetic pole portion 34211 and a second magnetic pole portion 34212. The first magnetic pole portion 34211 and the second magnetic pole portion 34212 are arranged opposite to each other, and the magnetic pole of the first magnetic pole portion 34211 and the magnetic pole of the second magnetic pole portion 34212 are opposite. For example, in one embodiment, the first magnetic pole portion 34211 can be an N-pole, and the second magnetic pole portion 34212 can be an S-pole. Alternatively, in another embodiment, the first magnetic pole portion 34211 can be an S-pole, and the second magnetic pole portion 34212 can be an N-pole. The first magnetic yoke 343 extends from one end of the connecting shaft 3411 to one end of the first magnetic pole portion 34211 and is arranged between the first magnetic pole portion 34211 and the second magnetic pole portion 34212. The second magnetic yoke 344 extends from one end of the connecting shaft 3411 to the other end of the first magnetic pole portion 34211 and is arranged between the first magnetic pole portion 34211 and the second magnetic pole portion 34212. The driving component 3422 is drivingly connected to the traction rod 321.

[0073] The switch device 30 is applied to the inverter, and is used to turn on or turn off the inverter circuit and the photovoltaic module. The switch device 30 can be electrically connected with the controller 21. The switch device 30 is used to energize the coil winding 341 according to the driving signal. For example, when the driving signal received by the switch device 30 is a current signal, the coil winding 341 is directly energized by the current signal. Alternatively, when the driving signal received by the switch device 30 is a signal instruction sent by the controller 21, the coil winding 341 is energized by the controller 21. FIG. 20 is a schematic diagram of an energized state of the tripping device according to an embodiment of the present application. As shown in FIG. 20, specifically, the tripping device 34 is used to energize the coil winding 341 to generate a first induced magnetic field according to the driving signal, so as to generate an attractive force on the first magnetic pole part 34211 and a repulsive force on the second magnetic pole part 34212 by the first magnetic yoke 343, and generate a repulsive force on the first magnetic pole part 34211 and an attractive force on the second magnetic pole part 34212 by the second magnetic yoke 344, so as to drive the magnetic assembly 3421 to rotate in a first rotation direction and drive the driving part 3422 to move, thereby driving the locking assembly to rotate from the first position to the second position, so as to separate the traction rod 321 from the locking rod 322 and keep the state of separation. Therefore, when a fault occurs, even if the operating handle 31 is operated, the tripping device 34 still separates the traction rod 321 from the locking rod 322, so that the operating mechanism 32 cannot drive the movable contact 331 to move, and the switch device 30 cannot be closed, thereby improving the stability of the switch device 30 in the tripped state.

[0074] FIG. 21 is another schematic diagram of an energized state of the tripping device according to an embodiment of the present application. As shown in FIG. 21, the tripping device 34 is also used to energize the coil winding 341 to generate a second induced magnetic field according to the reset signal, so as to generate a repulsive force on the first magnetic pole part 34211 and an attractive force on the second magnetic pole part 34212 by the first magnetic yoke 343, and generate an attractive force on the first magnetic pole part 34211 and a repulsive force on the second magnetic pole part 34212 by the second magnetic yoke 344, so as to drive the magnetic assembly 3421 to rotate in a second rotation direction and drive the driving part 3422 to move, thereby enabling the locking assembly to reset from the second position to the first position, so as to lock the traction rod 321 and the locking rod 322 when the operating handle 31 drives the operating mechanism 32 to move. In this embodiment, the reset signal can be a current signal, which directly energizes the coil winding 341. Alternatively, the reset signal can be a signal instruction sent by the controller 21, which energizes the coil winding 341 by the controller 21.

[0075] In the above embodiment, when the inverter is externally or internally faulty, the controller 21 generates a drive signal to trip the switch device 30. When the controller 21 sends a reset signal to the switch device 30, the locking lever 322 is engaged with the traction lever 321, so that the switch device 30 can be closed and opened. Therefore, both the locking scenario and the unlocking scenario can energize the coil winding 341. In this way, the first magnetic pole part 34211 and the second magnetic pole part 34212 of the magnetic assembly 3421 are subjected to different directions of magnetic force of the first magnetic yoke 343 and the second magnetic yoke 344, so that the driving component 3422 can be driven to rotate, and the switch device 30 can remain in the tripped state or remain in the normal working state before the signal disappears. Moreover, the bistable function can be achieved by changing the current direction of the coil winding 341 when energized, so as to achieve the bistability of the switch device 30 and improve the safety of the power system 20.

[0076] When the inverter is internally faulty, the switch device 30 receives the reset signal after the fault is solved. When the inverter is externally faulty, the switch device 30 receives the reset signal before the fault is solved. The internal fault of the inverter can be caused by the failure of the internal equipment of the inverter itself, including but not limited to overvoltage failure, overcurrent failure, breakdown failure, etc., so that the internal fault of the inverter needs to be solved by professional maintenance personnel, and cannot be completed by user inspection. The external fault of the inverter can be caused by the external environment failure of the inverter. Among them, the external environment failure of the inverter can occur in the internal part of the inverter, or in the external part of the inverter, which is regarded as the external fault of the inverter in this application. The external fault of the inverter can be checked and solved by the user or the system. Therefore, when the inverter is internally faulty, the controller 21 of the inverter sends a reset signal to the switch device 30 after the fault is solved, so that the user can avoid closing the switch device 30 without solving the fault, which can cause damage to the inverter. When the inverter is externally faulty, the controller 21 of the inverter can send a reset signal to the switch device 30 before the fault is solved. In this way, the user can normally close and open the switch device 30 after checking or after self-checking of the system.

[0077] In the above embodiment, in the scenario of the external fault of the inverter, the controller 21 of the inverter sends a reset signal to the switch device 30 before the fault is solved, specifically, the controller 21 sends the reset signal to the switch device 30 immediately after the controller 21 sends a drive signal to the switch device 30. That is, when the inverter is externally faulty, the switch device 30 receives the drive signal and the reset signal in sequence, so that the driving component 3422 first moves towards the traction lever 321, and then resets. In this way, after the fault is solved, the operating handle 31 can be directly driven to rotate, without waiting for the driving component 3422 to reset.

[0078] It should be noted that in the embodiments of the present application, the switch device 30 can be an isolating switch, a circuit breaker, a load switch, or other types of switches, etc.

[0079] The magnetic assembly 3421 of the switch device of the present application can be in the shape of an I-beam. As shown in FIG. 19, in one embodiment, the magnetic assembly 3421 includes a permanent magnet 34213, a first magnetic conducting plate 34214, and a second magnetic conducting plate 34215. The first magnetic conducting plate 34214 and the second magnetic conducting plate 34215 are magnetically attracted to the two sides of the permanent magnet 34213. The magnetic pole of the end of the first magnetic conducting plate 34214 that is magnetically attracted to the permanent magnet 34213 is opposite to the magnetic pole of the end of the second magnetic conducting plate 34215 that is magnetically attracted to the permanent magnet 34213. In this embodiment, the first magnetic conducting plate 34214 is the first magnetic pole portion 34211, and the second magnetic conducting plate 34215 is the second magnetic pole portion 34212. The first magnetic conducting plate 34214 and the second magnetic conducting plate 34215 are made of a magnetic conducting material, such as iron or nickel, etc. In another embodiment, the I-beam permanent magnet includes an integral intermediate connecting portion, the first magnetic pole portion 34211, and the second magnetic pole portion 34212. The intermediate connecting portion is connected between the first magnetic pole portion 34211 and the second magnetic pole portion 34212, and the first magnetic yoke 343 and the second magnetic yoke 344 are located on the two sides of the intermediate connecting portion away from the end of the connecting shaft 3411. In another embodiment, the magnetic assembly 3421 includes two separable T-shaped magnets that are identical in shape and opposite in magnetic circuit direction, and the two T-shaped magnets magnetically attract to form an I-beam permanent magnet. The first magnetic pole portion 34211 is the end portion of one of the two T-shaped magnets, and the second magnetic pole portion 34212 is the end portion of the other of the two T-shaped magnets.

[0080] In the embodiments of the present application, the shapes of the first magnetic yoke 343 and the second magnetic yoke 344 are not specifically limited, and can be, for example, L-shaped, U-shaped or other bent shapes. As shown in FIGS. 19-21, in one embodiment, the shapes of the first magnetic yoke 343 and the second magnetic yoke 344 are L-shaped, which is conducive to miniaturization of the release 34. Specifically, a portion of the first magnetic yoke 343 close to the connecting shaft 3411 is perpendicular to the axial direction of the connecting shaft 3411 (as shown by the dotted line in FIG. 19), and another portion of the first magnetic yoke 343 away from the connecting shaft 3411 is parallel to the axial direction of the connecting shaft 3411. A portion of the second magnetic yoke 344 close to the connecting shaft 3411 is perpendicular to the axial direction of the connecting shaft 3411, and another portion of the second magnetic yoke 344 away from the connecting shaft 3411 is parallel to the axial direction of the connecting shaft 3411. The other portion of the first magnetic yoke 343 is oppositely arranged with the other portion of the second magnetic yoke 344 and located between the first magnetic pole portion 34211 and the second magnetic pole portion 34212. In this way, the other portion of the first magnetic yoke 343 and the other portion of the second magnetic yoke 344 not only can attract and repel the first magnetic pole portion 34211 and the second magnetic pole portion 34212 of the magnetic assembly 3421, but also can limit the rotation angle of the first magnetic pole portion 34211 and the second magnetic pole portion 34212, so as to limit the movement stroke of the driving component 3422.

[0081] In the above release assembly 342, the driving component 3422 is used to implement the locking operation mechanism 32 or the unlocking operation mechanism 32. The structure of the driving component 3422 will be described in detail below.

[0082] As shown in FIGS. 19-21, in one embodiment, the driving component 3422 includes a rotating rod 34221 and a push rod 34222. The rotating rod 34221 rotates relative to the housing, the rotating rod 34221 is fixedly connected with the magnetic assembly 3421, and the rotating rod 34221 is movably connected with the push rod 34222. The push rod 34222 is slidably connected with the housing. The magnetic assembly 3421 is used to drive the rotating rod 34221 to rotate, so as to drive the push rod 34222 to move towards the traction rod 321 and abut against the traction rod 321, thereby driving the lock release assembly to rotate from the first position to the second position; and drive the push rod 34222 to move away from the lock release assembly to reset from the second position to the first position. In this embodiment, the induced magnetic field generated by the coil 3412 acts on the first magnetic pole portion 34211 and the second magnetic pole portion 34212 through the first magnetic yoke 343 and the second magnetic yoke 344, so as to drive the magnetic assembly 3421 to rotate. In the process of rotating the magnetic assembly 3421, the rotating rod 34221 rotates with the magnetic assembly 3421, and drives the push rod 34222 to slide, i.e., converts the rotating motion into sliding motion, so as to move the push rod 34222 towards or away from the traction rod 321.

[0083] Please continue to refer to FIG. 19 to FIG. 21, the movable connection between the push rod 34222 and the rotating rod 34221 can be achieved by simple structural design. In one embodiment, the push rod 34222 is provided with an opening 34223, and the rotating rod 34221 has a protrusion. The protrusion is accommodated in the opening 34223, and the movable connection between the push rod 34222 and the rotating rod 34221 is achieved by rotation in the opening 34223.

[0084] FIG. 22 is another schematic view of the switch device provided in the embodiments of the present application, FIG. 23 is a schematic view of the tripper in FIG. 22, and FIG. 24 is another schematic view of the tripper in FIG. 22. As shown in FIG. 22, FIG. 23 and FIG. 24, the driving component 3422 includes a rotating rod 34221. The rotating rod 34221 rotates relative to the housing, and the rotating rod 34221 is fixedly connected with the magnetic assembly 3421. The magnetic assembly 3421 is used to drive the rotating rod 34221 to rotate, so as to make the lock assembly rotate from the first position to the second position, and rotate from the second position to the first position. In this embodiment, the induced magnetic field generated by the coil 3412 acts on the first magnetic pole part 34211 and the second magnetic pole part 34212 through the first magnetic yoke 343 and the second magnetic yoke 344, so as to drive the magnetic assembly 3421 to move. In the movement process of the magnetic assembly 3421, the rotating rod 34221 rotates with the magnetic assembly 3421, and directly drives the traction rod 321 to rotate, so as to directly drive the lock assembly to rotate between the first position and the second position.

[0085] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A switching device, characterized by The device comprises a shell, an operating handle, an operating mechanism, a moving contact, a static contact and a tripping device, wherein: the operating handle is connected with the operating mechanism, the operating mechanism is connected with the moving contact; the operating handle at least the part close to the operating mechanism, the operating mechanism, the moving contact, the static contact and the tripping device are located in the shell; the operating mechanism comprises a lock assembly and a transmission assembly; the operating handle and the moving contact are respectively in transmission connection with the transmission assembly; the transmission assembly comprises a jump buckle, the jump buckle and the lock assembly are respectively in relative rotation with the shell; when the lock assembly is in a first position, the lock assembly keeps in engagement with the jump buckle, so that the operating handle can control the operating mechanism to drive the moving contact to move, thereby making the moving contact contact or separate from the static contact; when the lock assembly is in a second position, the lock assembly is disengaged from the jump buckle, so that the operating handle is tripped from the transmission assembly, so that the operating handle cannot control the operating mechanism to drive the moving contact, and the moving contact keeps in a separated state from the static contact; the tripping device comprises a coil winding, a first magnetic yoke, a second magnetic yoke and a tripping assembly; the coil winding is fixed relative to the shell; the first magnetic yoke and the second magnetic yoke are arranged at both ends of the coil winding; the tripping assembly comprises a fixedly connected magnetic assembly and a driving part; the magnetic assembly is located between the first magnetic yoke and the second magnetic yoke, the magnetic assembly comprises a first magnetic pole part and a second magnetic pole part, the first magnetic pole part and the second magnetic pole part are arranged oppositely and have opposite magnetic poles; one end of the first magnetic yoke away from the coil winding extends to between the first magnetic pole part and the second magnetic pole part, one end of the second magnetic yoke away from the coil winding extends to between the first magnetic pole part and the second magnetic pole part; the driving part is in transmission connection with the lock assembly, so that the lock assembly rotates between the first position and the second position; the tripping device is used to make the coil winding be electrified and generate a first induced magnetic field according to a driving signal, so that the first magnetic yoke generates an attractive force on the first magnetic pole part and a repulsive force on the second magnetic pole part; and the second magnetic yoke generates a repulsive force on the first magnetic pole part and an attractive force on the second magnetic pole part, to drive the magnetic assembly to rotate in a first rotation direction and drive the driving part to move, thereby making the lock assembly rotate from the first position to the second position, so that the lock assembly is disengaged from the jump buckle and keeps in a disengaged state.

2. The switching device of claim 1, wherein The tripping device is also configured to, according to a reset signal, energize the coil winding and generate a second induced magnetic field, so that the first magnetic yoke generates repulsion force on the first magnetic pole part and attraction force on the second magnetic pole part, and the second magnetic yoke generates attraction force on the first magnetic pole part and repulsion force on the second magnetic pole part, to drive the magnetic assembly to rotate in a second rotation direction and drive the driving component to reset, so that the lock assembly can be reset from the second position to the first position to be engaged with the trip latch when the operating handle drives the operating mechanism to move.

3. A switching device as claimed in claim 1 or 2, characterized in that The driving component comprises a rotating rod and a push rod; the rotating rod is relatively rotatable with the shell, the rotating rod is fixedly connected with the magnetic assembly, and the rotating rod is movably connected with the push rod; the push rod is slidably connected with the shell; The magnetic assembly is configured to drive the rotating rod to rotate, so as to drive the push rod to move towards the lock assembly and abut against the lock assembly, thereby driving the lock assembly to rotate from the first position to the second position, and drive the push rod to move away from the lock assembly and disengage from the lock assembly, so that the lock assembly can be reset from the second position to the first position.

4. The switching device of claim 3, wherein The push rod has an opening, and the rotating rod has a protrusion accommodated in the opening and movably connected with the push rod by rotation in the opening.

5. A switching device as claimed in claim 3 or 4, characterised in that the first and second switching elements are formed by a single switching element. The lock assembly is provided with a reset member; the reset member is configured to drive the lock assembly to reset from the second position to the first position to be engaged with the trip latch when the operating handle drives the operating mechanism to move.

6. The switching device of claim 1 or 2, wherein The driving component comprises a rotating rod; the rotating rod is relatively rotatable with the shell, the rotating rod is fixedly connected with the magnetic assembly, and the rotating rod is relatively fixed with the lock assembly; The magnetic assembly is configured to drive the rotating rod to rotate, so as to drive the lock assembly to rotate from the first position to the second position, and drive the lock assembly to rotate from the second position to the first position.

7. The switch device according to any one of claims 1 to 6, wherein The coil winding comprises a connecting shaft and a coil wound around the outer periphery of the connecting shaft; the first magnetic yoke and the second magnetic yoke are respectively connected to two ends of the connecting shaft; The first magnetic yoke and the second magnetic yoke are respectively L-shaped; a part of the first magnetic yoke close to the connecting shaft is perpendicular to the axial direction of the connecting shaft, and another part of the first magnetic yoke away from the connecting shaft is parallel to the axial direction of the connecting shaft; a part of the second magnetic yoke close to the connecting shaft is perpendicular to the axial direction of the connecting shaft, and another part of the second magnetic yoke away from the connecting shaft is parallel to the axial direction of the connecting shaft; the other part of the first magnetic yoke and the other part of the second magnetic yoke are oppositely arranged and extend between the first magnetic pole part and the second magnetic pole part.

8. The switch device according to any one of claims 1 to 7, wherein The magnetic assembly comprises a permanent magnet, a first magnetic conducting plate and a second magnetic conducting plate, the first magnetic conducting plate and the second magnetic conducting plate are oppositely arranged on two sides of the permanent magnet, and the permanent magnet magnetically attracts the first magnetic conducting plate and the second magnetic conducting plate; the first magnetic conducting plate is the first magnetic pole part, and the second magnetic conducting plate is the second magnetic pole part; or The magnetic assembly comprises an I-shaped permanent magnet, and the I-shaped permanent magnet comprises an integral intermediate connecting part, the first magnetic pole part and the second magnetic pole part; the intermediate connecting part is connected between the first magnetic pole part and the second magnetic pole part.

9. The switch device according to any one of claims 1 to 8, wherein The lock assembly comprises a traction rod and a lock rod, the traction rod and the lock rod are respectively rotationally connected with the shell, and the traction rod is located on the side of the lock rod away from the jump buckle; the lock rod is used for buckling or separating from the jump buckle; When the lock assembly is located at the first position, the first surface of the traction rod abuts against the lock rod, and the lock rod is buckled with the jump buckle; when the lock assembly is located at the second position, the second surface of the traction rod abuts against the lock rod, and the lock rod is separated from the jump buckle; when the lock assembly rotates from the first position to the second position, the lock rod slides from the first surface to the second surface of the traction rod; when the lock assembly resets from the second position to the first position, the lock rod slides from the second surface to the first surface of the traction rod.

10. The switch device according to any one of claims 1 to 9, wherein The switch device comprises a circuit breaker or an isolating switch.

11. The switch device according to any one of claims 1 to 10, wherein The switch device comprises a plurality of moving contacts and a plurality of static contacts, the number of the plurality of moving contacts is equal to and one-to-one corresponds to the number of the plurality of static contacts, and the plurality of moving contacts are respectively in transmission connection with the transmission assembly.

12. An inverter, characterized by comprising: The inverter circuit, the controller and the switch device as claimed in any one of claims 1 to 11 are comprised. The inverter circuit is electrically connected with a photovoltaic module through the switch device, the switch device is used for turning on or turning off the electrical connection between the photovoltaic module and the inverter circuit; the controller is electrically connected with the switch device; The controller is used for sending the drive signal to the switch device when an internal fault or an external fault occurs in the inverter, and a trip device of the switch device is used for making the operating handle trip from the operating mechanism according to the drive signal, so that the operating handle cannot control the operating mechanism to drive the moving contact, so that the moving contact and the static contact are kept separated to turn off the electrical connection between the photovoltaic module and the inverter circuit.

13. The inverter of claim 12, wherein, The controller is also used for sending a reset signal to the switch device; The trip device of the switch device is used for making the operating handle control the operating mechanism to drive the moving contact to move according to the reset signal, so that the moving contact and the static contact are in contact or separated, so as to turn on or turn off the electrical connection between the photovoltaic module and the inverter circuit.

14. The inverter of claim 13, wherein, When the external fault occurs, the controller is used for sending the reset signal to the switch device before the fault; The controller is configured to send a reset signal to the switch device after a fault within the inverter.

Images