Switching device and inverter

Abstract

The utility model provides a switching device and an inverter. The switching device comprises a shell, an operating handle, an operating mechanism, a moving contact, a static contact, a first release and a second release. When a fault occurs outside the inverter, the first tripper trips the switching device according to the first driving signal. And the first release can be reset by rotating the operating handle, so that a user or a system can automatically recover the switching-on and switching-off of the switching device after inspection. And when a fault occurs in the inverter, the second tripper of the switching device trips the switching device according to the second driving signal. And after the maintenance personnel solve the internal fault, the second tripper is recovered, so that the switching device can be switched on and switched off. When faults occur inside and outside the inverter, the switching device trips through different trips, so that a user or a system recovers tripping caused by external faults, maintenance personnel recovers tripping caused by internal faults, and the safety of the inverter is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power, and particularly relates to a switching device and an inverter. BACKGROUND

[0002] With the emergence of electric power, switching electrical appliances play an important role in many production processes and technical equipment. Switching electrical appliances are used for power distribution, control and protection in power systems. Taking a rotary disconnector as an example, the rotary disconnector is a commonly used switching device in an electric circuit. In the field of photovoltaic power generation, the rotary disconnector is usually composed of an operating mechanism, a multi-pole switching unit and a remote tripper.

[0003] In the photovoltaic power generation scenario, multi-path photovoltaic panel leads are connected to the input end of a multi-path controllable direct-current switch (hereinafter referred to as a switch). Due to the limitations of lead length, quantity, scene and other site conditions, failures inevitably occur in practice. In addition, internal failures of the inverter may also occur. At this time, the switch is opened under the action of a 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.

[0004] However, in actual application, the user 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 that the fault current signal still exists, which leads to the failure of the switch. Practical new type content

[0005] The present application provides a switching device and an inverter, so that when internal and external failures of the inverter occur, different trippers are used to trip the switching device, thereby enabling the user or system to restore the tripping caused by external failures, and enabling maintenance personnel to restore the tripping caused by internal failures, and thus improving the safety of the inverter.

[0006] In a first aspect, the application provides a switching device. The switching device comprises a housing, an operating handle, an operating mechanism, a movable contact, a stationary contact, a first tripping device and a second tripping 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 in part close to the operating mechanism, the operating mechanism, the movable contact, the stationary contact, the first tripping device and the second tripping device are located in the housing. The operating mechanism comprises a locking 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 jumper and a rocker, and the jumper, the rocker and the locking assembly are respectively relatively rotatable with the housing. The jumper is in transmission connection with the rocker. The operating handle and the movable contact are respectively in transmission connection with the rocker. The rocker is provided with a reset driving part. When the locking assembly is in a first position, the locking assembly keeps in engagement with the jumper, 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 locking assembly is in a second position, the locking assembly is disengaged from the jumper, 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 to move, and the movable contact keeps in a separated state from the stationary contact. The first tripping device comprises a first driving part. The first tripping device is used to drive the first driving part to drive the locking assembly to rotate from the first position to the second position according to a first driving signal, so that the locking assembly is disengaged from the jumper. When the operating handle drives the rocker to rotate in a direction close to the first tripping device, the reset driving part moves towards the first driving part and drives the first driving part to reset, so that the locking assembly can reset from the second position to the first position. While the operating handle drives the rocker to rotate in the direction close to the first tripping device, the rocker can drive the jumper to rotate towards the locking assembly, so that the jumper is engaged with the locking assembly, and the operating handle can control the operating mechanism to drive the movable contact to move. The second tripping device comprises a second driving part. The second tripping device is used to lock the movement of the operating mechanism according to a second driving signal, so that the operating handle cannot control the operating mechanism to drive the movable contact to move, and the movable contact keeps in a separated state from the stationary contact.

[0007] The switch device of the present application can be applied in an inverter for turning on or off the electrical connection between the inverter circuit of the inverter and the photovoltaic module. When the inverter fails, the controller of the inverter can send a driving signal to the switch device, so that the switch device trips. The internal failure 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 failure of the inverter needs to be solved by professional maintenance personnel, and cannot be completed by user inspection only. The external failure of the inverter can be caused by the external environmental failure of the inverter. Among them, the failure caused by the external environmental failure of the inverter can occur in the internal part of the inverter, or can occur in the external part of the inverter, which is regarded as the external failure of the inverter in the present application. The external failure of the inverter can be checked and solved by the user or the system. Specifically, when the external failure of the inverter occurs, the first driving part of the first tripping device drives the lock catch assembly to rotate from the first position to the second position, so that the lock catch assembly is separated from the trip catch, thereby making the operating mechanism and the operating handle tripped, and the moving contact and the stationary contact are separated. In this way, the operating handle cannot control the operating mechanism to drive the moving contact to move, so that the moving contact and the stationary contact remain in a separated state. At this time, the operating handle can drive the rocker arm to approach the first tripping device, so that the reset driving part moves towards the first driving part and drives the first driving part to reset, and the trip catch and the lock catch assembly are re-engaged. In this way, the operating handle can control the operating mechanism to drive the moving contact to move. When the internal failure of the inverter occurs, the second driving part of the second tripping device locks the operating mechanism, and the moving contact and the stationary contact are separated. In this way, the operating handle cannot control the operating mechanism to drive the moving contact to move, so that the moving contact and the stationary contact remain in a separated state. Therefore, when the internal and external failures of the inverter occur, the switch device is tripped by different tripping devices, so that the user or the system recovers the trip caused by the external failure, and the maintenance personnel recovers the trip caused by the internal failure, thereby improving the safety of the inverter.

[0008] The movement of the above-mentioned second tripping device for locking the operating mechanism can be achieved by locking different parts of the operating mechanism.

[0009] In one possible implementation, the second tripping device can lock the position of the lock catch assembly to achieve the engagement and disengagement of the lock catch assembly and the trip catch. Specifically, the second tripping device is configured to drive the second driving part to drive the lock catch assembly to rotate from the first position to the second position according to the second driving signal, so that the lock catch assembly and the trip catch remain in a disengaged state.

[0010] In another possible implementation, the second trip device can trip the operating handle from the operating mechanism by locking the movement of the transmission assembly. Specifically, the transmission assembly further includes a first mounting plate, a second mounting plate and an output shaft. Specifically, the first mounting plate and the second mounting plate are oppositely arranged, the operating handle passes through the first mounting plate and the second mounting plate and rotates relative to the first mounting plate and the second mounting plate. The rocker arm is located between the first mounting plate and the second mounting plate and is rotatably connected to the first mounting plate and the second mounting plate. The rocker arm is drivingly connected to the movable contact through the output shaft. The first mounting plate is provided with a first sliding groove, and the second mounting plate is provided with a second sliding groove. One end of the output shaft is accommodated in the first sliding groove, and the other end is accommodated in the second sliding groove. When the operating handle drives the rocker arm to rotate, the rocker arm drives the output shaft to slide in the first sliding groove and the second sliding groove, thereby driving the movable contact to move. In another possible implementation, the second trip device is configured to drive the second driving component to extend between the rocker arm and the first mounting plate or to extend between the rocker arm and the second mounting plate according to the second driving signal, so that the rocker arm cannot rotate, thereby locking the movement of the transmission assembly, so that the operating handle cannot control the operating mechanism to drive the movable contact to move. In another possible implementation, the second trip device is configured to drive the second driving component to extend into the first sliding groove or the second sliding groove according to the second driving signal, so as to lock the sliding of the output shaft in the first sliding groove and the second sliding groove, so that the rocker arm cannot rotate, thereby locking the movement of the transmission assembly, so that the operating handle cannot control the operating mechanism to drive the movable contact to move.

[0011] In one possible implementation, the first trip device can be an electromagnetic trip device. Specifically, the first trip device further includes a first coil assembly, a first permanent magnet assembly and a first spring, the first spring being connected to the first driving component. The first permanent magnet assembly generates a first magnetic field to exert a first force on the first driving component. The first coil assembly is configured to be energized according to the first driving signal, so that the first coil assembly generates a first induced magnetic field to exert a second force on the first driving component, and the second force counteracts the first force, thereby driving the first spring to drive the first driving component to move towards the locking assembly, and driving the locking assembly to rotate from the first position to the second position.

[0012] In one possible implementation, the first tripping device is an electromagnetic tripping device. The first driving component includes a first moving iron core, the first permanent magnet assembly includes a first permanent magnet, and the first coil assembly includes a first coil. The first tripping device further includes a first stationary iron core having a first accommodating space, one end of the first moving iron core, the first permanent magnet and the first coil being located in the first accommodating space. The first permanent magnet is located at one end of the first moving iron core, and the first coil is sleeved on the first moving iron core. The other end of the first moving iron core extends out of the first accommodating space and is arranged towards the locking assembly. The first spring is sleeved on the other end of the first moving iron core, one end of the first spring is fixed opposite to the first stationary iron core, and the other end of the first spring is fixed opposite to the other end of the first moving iron core. When the first coil is energized, the first induced magnetic field generated by the first coil is opposite to the first magnetic field generated by the first permanent magnet and is offset, so that the first moving iron core moves away from the first stationary iron core under the action of the first spring. When the operating handle drives the rocker arm to rotate towards the first tripping device, the reset driving part drives the first moving iron core to reset, so that the first permanent magnet magnetically attracts the first moving iron core, and the first moving iron core presses the first spring, so that the first tripping device returns to the initial state. The first tripping device has a simple structure and can reduce the manufacturing cost of the switch device.

[0013] Similarly, the second tripping device can also be an electromagnetic tripping device. Specifically, the second tripping device further includes a second coil assembly, a second permanent magnet assembly and a second spring, and the second spring is connected with the second driving component. The second magnetic field generated by the second permanent magnet assembly applies a third acting force to the second driving component, and the second coil assembly is used to be energized according to the second driving signal, so that the second induced magnetic field generated by the second coil assembly applies a fourth acting force to the second driving component, and the fourth acting force and the third acting force are offset, so that the second spring drives the second driving component to move towards the locking assembly, and drives the locking assembly to rotate from the first position to the second position.

[0014] In a possible implementation, the second tripping device is of an electromagnetic tripping device type, and the second driving component includes a second moving iron core, the second permanent magnet assembly includes a second permanent magnet, and the second coil assembly includes a second coil. The second tripping device further includes a second stationary iron core having a second accommodating space, and the one end of the second moving iron core, the second permanent magnet and the second coil are located in the second accommodating space. The second permanent magnet is located at the one end of the second moving iron core, and the second coil is sleeved on the second moving iron core. The other end of the second moving iron core extends out of the second accommodating space and is arranged towards the locking assembly. A second spring is sleeved on the other end of the second moving iron core, one end of the second spring is fixed opposite to the second stationary iron core, and the other end of the second spring is fixed opposite to the other end of the second moving iron core. When the second coil is energized, a second induced magnetic field generated by the second coil is opposite to a second magnetic field of the second permanent magnet and is offset, so that the second moving iron core moves away from the second stationary iron core under the action of the second spring. When the operating handle drives the rocker arm to rotate towards the second tripping device, the reset driving part drives the second moving iron core to reset, so that the second permanent magnet magnetically attracts the second moving iron core, and the second moving iron core presses the second spring, so that the second tripping device returns to the initial state. The second tripping device has a simple structure, and can reduce the manufacturing cost of the switch device.

[0015] In another possible implementation, the second tripping device can be a bistable tripping device. Specifically, the second tripping device further comprises a third coil assembly and a third permanent magnet assembly. The third permanent magnet assembly generates a third magnetic field that exerts a fifth force on the second driving component. The third coil assembly is configured to be energized according to a second driving signal, so that the third coil assembly generates a third induced magnetic field that exerts a sixth force on the second driving component, and a part of the sixth force counteracts the fifth force, so that the second driving component is driven to move toward the locking assembly under the action of another part of the sixth force, and the locking assembly is driven to rotate from the first position to the second position. The third coil assembly is further configured to be energized according to a reset signal, so that the third coil assembly generates a fourth induced magnetic field that exerts a seventh force on the second driving component, and a part of the seventh force counteracts the fifth force, so that the second driving component is reset under the action of another part of the seventh force. In this technical solution, when an internal fault occurs, even if the operating handle is operated, the second tripping device still locks the movement of the operating mechanism, so that the operating mechanism cannot drive the movable contact to move, and the switch device cannot be closed, thereby improving the stability of the switch device in the tripped state. After the internal fault is solved, the second driving component can be reset, so that the locking assembly can be reset to the first position and kept in the first position. Therefore, when the operating handle drives the operating mechanism to move, the locking assembly can be engaged with the tripping latch, so that the closing and opening of the switch device can be realized through 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 bistability of the switch device.

[0016] In one possible implementation, the second tripping device is of a bistable tripping device type. The third coil assembly includes a coil winding, a first magnetic yoke and a second magnetic yoke. 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 third permanent magnet assembly is fixedly connected with the second driving component. The third permanent magnet assembly is located between the first magnetic yoke and the second magnetic yoke, and includes a first magnetic pole portion and a second magnetic pole portion oppositely arranged with opposite magnetic poles. The first magnetic yoke extends to between the first magnetic pole portion and the second magnetic pole portion at an end away from the coil winding, and the second magnetic yoke extends to between the first magnetic pole portion and the second magnetic pole portion at an end away from the coil winding. The coil winding is configured to be energized according to the second driving signal, so that a third induced magnetic field generated by the coil winding generates an attractive force on the first magnetic pole portion and a repulsive force on the second magnetic pole portion through the first magnetic yoke, and generates a repulsive force on the first magnetic pole portion and an attractive force on the second magnetic pole portion through the second magnetic yoke, to drive the third permanent magnet assembly to rotate in a first rotation direction and drive the second driving component to move, thereby locking the movement of the operating mechanism. The coil winding is also configured to be energized according to a reset signal, so that a fourth induced magnetic field generated by the coil winding generates a repulsive force on the first magnetic pole portion and an attractive force on the second magnetic pole portion through the first magnetic yoke, and generates an attractive force on the first magnetic pole portion and a repulsive force on the second magnetic pole portion through the second magnetic yoke, to drive the third permanent magnet assembly to rotate in a second rotation direction and drive the second driving component to reset, thereby unlocking the movement of the operating mechanism.

[0017] In the above switch device, the driving component includes a rotating rod and a push rod. The rotating rod is rotatable relative to the housing, and is fixedly connected with the third permanent magnet assembly. The rotating rod is movably connected with the push rod. The push rod is movably connected with the housing. The third permanent magnet assembly is configured to drive the rotating rod to rotate, to drive the push rod to move towards the operating mechanism, and to drive the push rod to move away from the operating mechanism. In this technical solution, the induced magnetic field generated by the coil winding acts on the first magnetic pole portion and the second magnetic pole portion through the first magnetic yoke and the second magnetic yoke, to drive the third permanent magnet assembly to move. During the movement of the third permanent magnet assembly, the rotating rod rotates with the third permanent magnet assembly, and drives the push rod to slide, i.e., converts the rotating movement into sliding movement, thereby enabling the push rod to move towards or away from the operating mechanism.

[0018] 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.

[0019] In another possible implementation, the driving component includes a rotating rod. The rotating rod is relatively rotatable with the housing, and the rotating rod is fixedly connected with the third permanent magnet assembly. The rotating rod is relatively fixed with the locking catch assembly. The third permanent magnet assembly is configured to drive the rotating rod to rotate, so as to drive the locking catch assembly to rotate from the first position to the second position, and to drive the locking catch assembly to rotate from the second position to the first position. Alternatively, the rotating rod is relatively fixed with the rocker arm. The third permanent magnet assembly is configured to drive the rocker arm to rotate, so as to limit the movement of the rocker arm. 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 third permanent magnet assembly to move. In the movement process of the third permanent magnet assembly, the rotating rod follows the third permanent magnet assembly to rotate, and directly drives the locking catch assembly to rotate, so as to directly drive the locking catch assembly to rotate between the first position and the second position. Alternatively, the rotating rod drives the rocker arm to rotate, so as to lock the position of the rocker arm.

[0020] In another possible implementation, the second tripping device is of a bistable tripping device type, the drive component includes a moving shaft, the third coil assembly includes a third coil and a fourth coil, and the third permanent magnet assembly includes a third permanent magnet and a fourth permanent magnet. The moving shaft is relatively slidable with the housing, and the moving shaft is in transmission connection with the operating mechanism. The third coil and the fourth coil are in series and are arranged around the outer periphery of the moving shaft. The third permanent magnet and the fourth permanent magnet are relatively fixed with the housing, and the third permanent magnet and the fourth permanent magnet are located between the third coil and the fourth coil. Along the sliding direction of the moving shaft, the third permanent magnet and the fourth permanent magnet are located on two sides of the moving shaft. The magnetic path direction in the third permanent magnet is opposite to the magnetic path direction in the fourth permanent magnet and is perpendicular to the sliding direction. In the part of the moving shaft located on the side of the third permanent magnet facing the third coil, the magnetic path direction of the magnetic field generated by the third permanent magnet and the fourth permanent magnet is a first direction. In the part of the moving shaft located on the side of the third permanent magnet facing the fourth coil, the magnetic path direction of the magnetic field generated by the third permanent magnet and the fourth permanent magnet is a second direction. The first direction is opposite to the second direction, and the first direction and the second direction are parallel to the sliding direction. The third coil and the fourth coil are configured to be energized according to the second drive signal and generate a third induced magnetic field, so that the magnetic path direction of the third induced magnetic field in the moving shaft is the same as the first direction and opposite to the second direction, so that the moving shaft slides in the first direction and approaches the operating mechanism, thereby locking the movement of the operating mechanism. The third coil and the fourth coil are also configured to be energized according to a reset signal and generate a fourth induced magnetic field, so that the magnetic path direction of the fourth induced magnetic field in the moving shaft is the same as the second direction and opposite to the first direction, so that the moving shaft slides in the second direction to reset, thereby unlocking the movement of the operating mechanism. In this technical solution, when an internal fault occurs, even if the operating handle is operated, the second tripping device still locks the movement of the operating mechanism, so that the operating mechanism cannot drive the movable contact to move, causing the switch device to be unable to close, thereby improving the stability of the switch device in the tripped state. After the internal fault is solved, the second drive component can be reset, so that 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 locking assembly can be engaged with the tripping latch, so that the closing and opening of the switch device can be realized through 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 bistability of the switch device.

[0021] In the above switch device, the second trip unit further comprises a third mounting plate and a third yoke. The third mounting plate is fixed relative to the housing. The third yoke is a U-shaped yoke, and the third mounting plate covers an opening of the U-shaped yoke and forms a third accommodating space. The moving shaft, the third coil, the fourth coil, the third permanent magnet, and the fourth permanent magnet are located in the third accommodating space. In one possible implementation, the third mounting plate is located at a side of the U-shaped yoke close to the locking assembly, and the third mounting plate is provided with a first opening, and one end of the moving shaft extends out of the third accommodating space through the first opening. In another possible implementation, the third mounting plate is located at a side of the U-shaped yoke away from the locking assembly. The U-shaped yoke comprises two parallel sidewalls and a bottom wall connecting the two sidewalls, and the bottom wall is located opposite to the third mounting plate. The bottom wall is provided with a second opening. One end of the moving shaft extends out of the third accommodating space through the second opening. In this technical solution, when the second coil and the third coil are energized, the third yoke can diffuse the induced magnetic field generated by the second coil and the third coil to the entire accommodating space, so that the induced magnetic field can cover the moving shaft.

[0022] In one possible implementation, the locking assembly comprises a traction rod and a locking rod, and the traction rod and the locking rod are rotationally connected to the housing respectively. The traction rod is located at a side of the locking rod away from the trip lever. The locking rod is configured to be buckled with or separated from the trip lever. When the locking assembly is located at the first position, the first surface of the traction rod abuts against the locking rod, and the locking rod is buckled with the trip lever. When the locking assembly is located at the second position, the second surface of the traction rod abuts against the locking rod, and the locking rod is separated from the trip lever. When the locking assembly rotates from the first position to the second position, the locking rod slides from the first surface of the traction rod to the second surface. When the locking assembly resets from the second position to the first position, the locking rod slides from the second surface of the traction rod to the first surface. By changing the surface of the traction rod abutting against the locking rod, the locking rod can be buckled with or separated from the trip lever. In actual applications, the traction rod can be rotated to achieve this.

[0023] In one possible implementation, the locking assembly is provided with a reset member configured to drive the locking assembly to reset from the second position to the first position, so that the locking assembly is buckled with the trip lever when the operating handle drives the operating mechanism to move. In this way, after the first trip unit and the second trip unit are separated from the locking assembly, the locking assembly can reset to the first position under the action of the reset member, so as to wait for the locking assembly to be buckled with the trip lever again, and the switch device can be closed and opened.

[0024] The specific type of the switch device of the present application is not limited, for example, the switch device can comprise a circuit breaker, an isolating switch, or other circuit switches.

[0025] In a possible implementation, the switch device comprises a plurality of moving contacts and a plurality of static contacts, the number of the moving contacts and the number of the static contacts are equal and one-to-one corresponding, and the moving contacts are respectively in transmission connection with the transmission assembly of the operating mechanism. A single moving contact and a corresponding static contact can form a layer of contact assembly and be used to turn on or turn off a branch. The switch device of the technical scheme can be applied to multiple branches in a circuit.

[0026] In a second aspect, the application provides an inverter. The inverter comprises an inverter circuit, a controller and the switch device of the first aspect. The inverter circuit is electrically connected with the photovoltaic module through the switch device, and the switch 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 switch device. The controller is used to send a first driving signal to the switch device when a fault occurs outside the inverter. The first tripping device of the switch device is used to drive the locking assembly to rotate from the first position to the second position according to the first driving signal, so that the locking assembly and the jump buckle are kept in a disengaged state, so that the operating handle cannot control the operating mechanism to drive the moving contact to move, and the moving contact and the static contact are kept in a separated state to turn off the electrical connection between the photovoltaic module and the inverter circuit. The controller is also used to send a second driving signal to the switch device when a fault occurs inside the inverter. The second tripping device of the switch device is used to lock the movement of the operating mechanism according to the second driving signal, so that the operating handle cannot control the operating mechanism to drive the moving contact, and the moving contact and the static contact are kept in a separated state, thereby turning off the electrical connection between the photovoltaic module and the inverter circuit.

[0027] When an inverter malfunctions, its controller can send a drive signal to the switching device, causing it to trip. Internal inverter faults may be caused by inherent defects in the inverter's internal components, including but not limited to overvoltage, overcurrent, and breakdown faults. Therefore, internal inverter faults require professional maintenance personnel to resolve, and cannot be handled solely by the user. External inverter faults may be caused by environmental factors. These external environmental faults can occur either inside or outside the inverter; in this application, they are both considered external faults. External faults can be inspected and resolved by the user or the system. In both internal and external inverter faults, different trip units trip the switching device, allowing the user or system to restore tripping caused by external faults and enabling maintenance personnel to restore tripping caused by internal faults, thereby improving inverter safety. After resolving external inverter faults, the user or system can automatically close the switching device to restore the electrical connection between the inverter circuit and the photovoltaic modules. After external faults occur in the inverter, and the internal faults are resolved by maintenance personnel, the personnel will then close the circuit breaker to restore the electrical connection between the inverter circuit and the photovoltaic modules. This avoids the user closing the circuit breaker without resolving the internal problem, thus preventing damage to the inverter. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an application scenario of a power system provided in an embodiment of this application;

[0029] Figure 2 for Figure 1 A partial schematic diagram of the Zhongyi Power System within the dashed box;

[0030] Figure 3 A schematic diagram of a switching device provided in an embodiment of this application;

[0031] Figure 4 Another schematic diagram of the switching device provided in the embodiments of this application;

[0032] Figure 5 Another schematic diagram of the switching device provided in the embodiments of this application;

[0033] Figure 6 An exploded schematic diagram of a switching device provided in an embodiment of this application;

[0034] Figure 7 A schematic diagram of the traction rod, locking rod, and transmission mechanism provided in an embodiment of this application;

[0035] Figure 8 for Figure 7 A cross-sectional schematic diagram of the central traction rod, locking rod, and transmission mechanism along the XX direction;

[0036] Figure 9 A schematic view of a drawbar and a catchbar provided for embodiments of the present application;

[0037] Figure 10 Another schematic view of a drawbar and a catchbar provided for embodiments of the present application;

[0038] Figure 11 A schematic view of a drawbar, a catchbar and a jumper provided for embodiments of the present application with the catch assembly in a first position;

[0039] Figure 12 A schematic view of Figure 11 a drawbar and a catchbar provided for embodiments of the present application;

[0040] Figure 13 A schematic view of a drawbar, a catchbar and a jumper provided for embodiments of the present application with the catch assembly in a second position;

[0041] Figure 14 A schematic view of Figure 13 a drawbar and a catchbar provided for embodiments of the present application;

[0042] Figure 15 An exploded schematic view of a drawbar, a catchbar and a transmission provided for embodiments of the present application;

[0043] Figure 16 Another schematic view of a drawbar, a catchbar and a transmission provided for embodiments of the present application;

[0044] Figure 17 Another schematic view of a drawbar, a catchbar and a transmission provided for embodiments of the present application;

[0045] Figure 18 Another schematic view of a drawbar, a catchbar and a transmission provided for embodiments of the present application;

[0046] Figure 19 A schematic view of a switchgear in a closed state provided for embodiments of the present application;

[0047] Figure 20 A schematic view of Figure 19 a switchgear provided for embodiments of the present application;

[0048] Figure 21 A schematic view of a switchgear in an open state provided for embodiments of the present application;

[0049] Figure 22 A schematic view of Figure 21 a switchgear provided for embodiments of the present application;

[0050] Figure 23A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0051] Figure 24 A schematic view of a switch device according to an embodiment of the application in a tripped state; Figure 23 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0052] Figure 25 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0053] Figure 26 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0054] Figure 27 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0055] Figure 28 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0056] Figure 29 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0057] Figure 30 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0058] Figure 31 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0059] Figure 32 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0060] Figure 33 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0061] Figure 34 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0062] Figure 35 A schematic view of a switch device according to an embodiment of the application in a tripped state; Figure 34 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0063] Figure 36 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0064] Figure 37 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0065] Figure 38 A schematic view of a switch device according to an embodiment of the application in a tripped state;

[0066] Reference signs:

[0067] 10 - Photovoltaic power generation system

[0068] 20 - Power system

[0069] 21 - Controller

[0070] 30 - Switching device

[0071] 31 - Operating handle

[0072] 32 - Operating mechanism

[0073] 33 - Contact assembly

[0074] 34 - Towing bar

[0075] 35 - Latch bar

[0076] 36 - First release

[0077] 37 - Second release

[0078] 41 - Electromagnetic release

[0079] 311 - Knob

[0080] 321 - First mounting plate

[0081] 322 - Second mounting plate

[0082] 323 - First spring

[0083] 324 - Drive crank

[0084] 328 - Reset drive portion

[0085] 351 - Groove

[0086] 352 - Hook

[0087] 360 - First drive component

[0088] 370 - Second drive component

[0089] 371 - Coil winding

[0090] 372 - First magnetic yoke

[0091] 373 - Second magnetic yoke

[0092] 374 - Drive assembly

[0093] 375 - Movement axis

[0094] 376 - Second coil

[0095] 377 - Third coil

[0096] 378 - second permanent magnet

[0097] 379 - third permanent magnet

[0098] 380 - mounting plate

[0099] 381 - third magnetic yoke

[0100] 411 - moving iron core

[0101] 412 - stationary iron core

[0102] 413 - first permanent magnet

[0103] 414 - first coil

[0104] 415 - second spring

[0105] 3211 - first sliding slot

[0106] 3221 - second sliding slot

[0107] 3741 - magnetic assembly

[0108] 3742 - driving component

[0109] 3801 - first opening

[0110] 3811 - second opening

[0111] 37411 - first magnetic pole portion

[0112] 37412 - second magnetic pole portion

[0113] 37421 - rotating rod

[0114] 37422 - shifting rod

[0115] S1 - first surface

[0116] S2 - second surface

[0117] COD - input crank

[0118] DF - input connecting rod

[0119] FG - rocker arm

[0120] HE - jump ring

[0121] HJ - upper connecting rod

[0122] JK - lower connecting rod

[0123] KO' L' - output crank

[0124] LL' - output shaft DETAILED DESCRIPTION

[0125] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0126] To facilitate understanding of the switching device and inverter provided in the embodiments of this application, their application scenarios are described below. The switching device and inverter provided in the embodiments of this application can be widely used in various power supply and distribution systems. In one example provided in this application, the switching device can be applied to a photovoltaic power generation system, which is a system that uses solar energy to generate electricity, providing people with clean and renewable energy by converting solar energy into electrical energy. Figure 1 This is a schematic diagram of an application scenario of a power system provided in an embodiment of this application. Figure 2 for Figure 1 A partial schematic diagram of the Zhongyi power system within the dashed box. (See attached diagram.) Figure 1 and Figure 2 As shown, the photovoltaic power generation system 10 includes an energy storage system and photovoltaic modules. The photovoltaic modules, with their strings of photovoltaic panels, convert solar energy into direct current (DC) through the photovoltaic effect. An inverter converts the DC output from the photovoltaic modules into alternating current (AC) and further transmits the AC to a prefabricated substation. The prefabricated substation converts the low-voltage AC output from the inverter into medium-voltage AC and further transmits the AC to a step-up substation, the power grid, or a prefabricated substation corresponding to the energy storage system. The energy storage system stores the unstable electrical energy from the photovoltaic modules. The energy storage system includes multiple parallel-connected battery clusters, which output stable electrical energy to the power grid through an energy storage converter and the corresponding prefabricated substation. The power system 20 includes photovoltaic modules and an inverter. In this 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 modules through the switching device 30. The switching device 30 is used to connect or disconnect the electrical connection between the photovoltaic modules and the inverter circuit. When maintenance, repair, or replacement of the battery clusters or photovoltaic panel strings is required, the electrical connection between the photovoltaic modules and the inverter circuit can be disconnected by disconnecting the switch device 30. This ensures that no danger to personnel or the inverter will be posed during maintenance and repair of the electrical connection between the photovoltaic modules and the inverter circuit. Additionally, the switch device 30 can also be used for the regulation and control of the photovoltaic power generation system 10. The controller 21 is electrically connected to the switch device 30 and is used to control the switching device 30 to turn on and off.

[0127] 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, 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. Figure 3 A schematic diagram of the switch device provided by the embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, in one embodiment, the switch device 30 can be a rotary disconnecting switch, and the rotary disconnecting switch comprises a plurality of 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 plurality of 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. Figure 3

[0128] As shown in FIG. 2, when the inverter fails, the controller 21 generates a drive signal and sends it to the switch device 30, wherein the drive signal can be a trip command or a change in current parameter sent by the controller 21. 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 artificial handle can make the operating handle and the operating mechanism retransmission connection, the artificial handle can temporarily close the switch device 30 before the fault is solved. Figure 2

[0129] However, the inverter can have external faults or internal faults. Since the inverter fault has not been solved, the switch device will still trip after a short closing, and multiple closing operations can easily damage the switch device, leading to the failure of the switch device and affecting the safety of the inverter and the stability of the voltage output; and since the user cannot determine whether the fault is an external fault or an internal fault, closing the switch device in the case that the internal fault has not been solved can cause serious damage to the inverter.

[0130] ​​In view of this, the application provides a switching device and an inverter, so that the switching device is tripped by different trippers when internal and external faults of the inverter occur, thereby enabling a user or a system to recover from tripping caused by external faults and enabling a maintenance personnel to recover from tripping caused by internal faults, and thus improving the safety of the inverter.

[0131] It should be noted that the terminology used in the following description merely for the purpose of describing particular embodiments and is not intended to be limiting of the application. As used in this description and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0132] 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 present application. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" or "in some embodiments" or "in other embodiments" or "in still other embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, unless otherwise indicated. Furthermore, the terms "comprises an," "comprises," "comprising," "includes," "including," "has," "having," "contains" or "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, includes, has, contains a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An exception to this is when a claim expressly recites only one element as being included in a "comprising," "including," "has," "has

[0133] As Figure 2As shown, the power system 20 includes a photovoltaic assembly and an inverter. The inverter includes an inverter circuit, a controller 21 and a switching device 30. The inverter circuit is electrically connected with the photovoltaic assembly through the switching device 30. The switching device 30 is used to turn on or turn off the photovoltaic assembly and the inverter circuit. The controller 21 is electrically connected with the switching device 30. In the present application, the internal failure 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 and breakdown failure, etc. Therefore, the internal failure of the inverter needs to be solved by professional maintenance personnel after the internal failure of the inverter, and cannot be completed only by user inspection. The external failure of the inverter can be caused by the external environmental failure of the inverter. The external environmental 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 failure of the inverter in the present application. The external failure of the inverter can be checked and solved by the user or the system. Specifically, when the external failure of the inverter occurs, the controller 21 sends a first driving signal to the switching device 30, so that the switching device 30 trips, thereby turning off the photovoltaic assembly and the inverter circuit. Before the failure is solved, the switching device 30 can be reset and closed and opened, thereby turning on the photovoltaic assembly and the inverter circuit, or turning off the photovoltaic assembly and the inverter circuit. When the internal failure of the inverter occurs, the controller 21 sends a second driving signal to the switching device 30, so that the switching device 30 trips, thereby turning off the photovoltaic assembly and the inverter circuit. After the failure is solved, the switching device 30 can be reset and closed and opened, thereby turning on the photovoltaic assembly and the inverter circuit, or turning off the photovoltaic assembly and the inverter circuit.

[0134] The structure of the switching device 30 will be described in detail below.

[0135] Figure 4 Another schematic diagram of the switching device provided by the embodiment of the present application, Figure 5 Another schematic diagram of the switching device provided by the embodiment of the present application, Figure 6 Another schematic diagram of the switching device provided by the embodiment of the present application. As Figure 4 、 Figure 5 and Figure 6As shown, the switch device 30 comprises a housing (not shown in the figure), an operating handle 31, an operating mechanism 32, a contact assembly 33, a first tripping device 36 and a second tripping device 37, the operating handle 31, the operating mechanism 32, the contact assembly 33, the first tripping device 36 and the second tripping device 37 are located in the housing, and the contact assembly 33 comprises a moving contact 331 and a stationary contact (not shown in the figure). Specifically, the operating handle 31 is in transmission connection with the operating mechanism 32. At least a part of the operating handle 31 away from the operating mechanism 32 extends out of the housing, so as to be operated by a user to close or open the switch device 30. The operating mechanism 32 is in transmission connection with the moving contact 331, and the operating handle 31 is used to control the operating mechanism 32 to drive the moving contact 331 to move, so that the moving contact 331 can be in contact with or separated from the stationary contact. In an embodiment, an end of the operating handle 31 away from the operating mechanism 32 can extend out of the housing, so as to be pushed by a worker to close or open the switch device 30. In another embodiment, a knob 311 is arranged on the outer surface of the housing, so as to realize the closing and opening of the switch device 30 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 worker performs the 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, the electric operating device is connected with the operating handle 31 and the remote controller, so as to realize the closing and opening of the switch device 30 by electric operation. When the worker performs the electric operation, a closing instruction or an opening instruction is sent to the remote controller, and the remote controller can control the electric operating device to push the operating handle 31. In this embodiment, the worker can issue the instruction close to the switch device 30, or can issue the instruction remotely through a communication device. The operating mechanism 32 comprises a lock catch assembly and a transmission assembly. The lock catch assembly comprises a traction rod 34 and a lock catch rod 35. The transmission assembly comprises a trip HE.

[0136] Figure 7 A schematic view of the traction rod, the lock catch rod and the transmission mechanism provided in the embodiment of the present application, Figure 8 A schematic view of the traction rod, the lock catch rod and the transmission mechanism provided in the embodiment of the present application, Figure 7 A schematic view of the traction rod, the lock catch rod and the transmission mechanism provided in the embodiment of the present application, Figure 7 A schematic view of the traction rod, the lock catch rod and the transmission mechanism provided in the embodiment of the present application, Figure 8 As shown, the traction rod 34 and the lock catch rod 35 are arranged close to the operating mechanism 32, and the traction rod 34 and the lock catch rod 35 are respectively in opposite rotation with the housing. That is, the rotation center A of the traction rod 34 and the rotation center B of the lock catch rod 35 do not overlap. The lock catch rod 35 is used to be buckled or separated from the trip HE. The traction rod 34 is located on the side of the lock catch rod 35 away from the trip HE, and the traction rod 34 abuts against the lock catch rod 35.

[0137] Figure 9 A schematic view of the traction rod, the lock catch rod and the transmission mechanism provided in the embodiment of the present application, Figure 10Another schematic view of the towing bar and the locking bar provided by the embodiment of the present application. As shown in Figure 9 and Figure 10 , the locking bar 35 is provided with a groove 351. The jumper HE is provided with a hook 352 near one side of the locking bar 35. The hook 352 can be hooked in the groove 351, so as to realize the buckling of the locking bar 35 and the jumper HE.

[0138] Figure 11 A schematic view of the towing bar, the locking bar and the jumper provided by the embodiment of the present application when the locking assembly is in the first position, Figure 12 for Figure 11 , an enlarged schematic view of the towing bar and the locking bar. As shown in Figure 11 and Figure 12 , when the locking assembly is in the first position, the locking assembly and the jumper HE are kept in the buckling state, so as to enable the operating handle 31 to control the operating mechanism 32 to drive the movable contact 331 to move, so as to make the movable contact 331 contact or separate from the static contact. Specifically, the first surface S1 of the towing bar 34 abuts against the locking bar 35, so as to keep the locking bar 35 and the jumper HE in the buckling state. Figure 13 A schematic view of the towing bar, the locking bar and the jumper provided by the embodiment of the present application when the locking assembly is in the second position, Figure 14 for Figure 13 , an enlarged schematic view of the towing bar and the locking bar. As shown in Figure 13 and Figure 14 , when the locking assembly is in the second position, the locking assembly and the jumper HE are separated, so as to make the operating handle 31 and the transmission assembly decoupled, so as to make the operating handle 31 unable to control the operating mechanism 32 to drive the movable contact 331 to move, and make the movable contact 331 keep in the separated state from the static contact. Specifically, the second surface S2 of the towing bar 34 abuts against the locking bar 35, and the locking bar 35 is separated from the jumper HE. The first surface S1 and the second surface S2 of the towing bar 34 are adjacently arranged. The first decoupler 36, or the first decoupler 36 and the second decoupler 37 can drive the towing bar 34 to rotate counterclockwise around the point A, so as to make the locking assembly rotate 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 34 drives the locking bar 35 to rotate counterclockwise around the point B, and the locking bar 35 slides from the first surface S1 to the second surface S2 of the towing bar 321, so as to finally separate the locking bar 35 from the jumper HE.

[0139] Figure 15 An exploded schematic view of the towing bar, the locking bar and the transmission mechanism provided by the embodiment of the present application. As shown in Figure 7 , Figure 8 and Figure 15As shown, the operating mechanism 32 also includes a first mounting plate 321 and a second mounting plate 322. The transmission assembly also includes an input crank (COD), an input connecting rod (DF), a rocker arm (FG), an upper connecting rod (HJ), a lower connecting rod (JK), an output crank (KO'L'), an output shaft (LL'), and a first spring 323. The first mounting plate 321 and the second mounting plate 322 are arranged opposite to each other, and the first mounting plate 321 and the second mounting plate 322 are respectively fixed relative to the housing. The operating handle 31 passes through the first mounting plate 321 and the second mounting plate 322, with one end of the operating handle 31 located on the side of the first mounting plate 321 away from the second mounting plate 322. The input crank (COD) and the input connecting rod (DF) are both located on the side of the first mounting plate 321 away from the second mounting plate 322. The jumper (HE), the rocker arm (FG), the upper connecting rod (HJ), the lower connecting rod (JK), and the output crank (KO'L') are all located between the first mounting plate 321 and the second mounting plate 322.

[0140] Figure 16 Another schematic diagram of the traction rod, locking rod, and transmission mechanism provided in an embodiment of this application. (See diagram below.) Figure 16 As shown, specifically, the operating handle 31 can rotate clockwise or counterclockwise relative to the first mounting plate 321 and the second mounting plate 322. The input crank COD is sleeved on the operating handle 31 and is fixedly connected to it. Thus, when the operating handle 31 rotates, the input crank COD can rotate around point O relative to the first mounting plate 321. One end of the input connecting rod DF is rotatably connected to the input crank COD at point D, and the other end of the input connecting rod DF is rotatably connected to the rocker arm FG at point F. The rocker arm FG is rotatably connected to the first mounting plate 323 and the second mounting plate 324 at point G, allowing the rocker arm FG to rotate around G relative to the first mounting plate 321 and the second mounting plate 322. The rocker arm FG is provided with a reset drive unit 328. When the traction rod 321 is in the first position and the locking rod 322 is separated from the trip lock HE, the drive operating handle 31 is rotated to drive the rocker arm FG to rotate in the direction close to the first trip unit 34, thereby causing the reset drive unit 328 to drive the drive component of the first trip unit 34 to reset.

[0141] Figure 17 This is another schematic diagram of the traction rod, locking rod, and transmission mechanism provided in an embodiment of this application. Figure 18 Another schematic diagram of the traction rod, locking rod, and transmission mechanism provided in an embodiment of this application. (See diagram below.) Figure 17 and Figure 18As shown, the jumper HE is rotatably connected with the first mounting plate 323 and the second mounting plate 324 at E point respectively, so that the jumper HE can rotate relative to the first mounting plate 321 and the second mounting plate 322 around E point. The jumper HE is rotatably connected with one end of the upper connecting rod HJ at H point. The other end of the upper connecting rod HJ is rotatably connected with one end of the lower connecting rod JK at J point. The other end of the lower connecting rod JK is rotatably connected with the output crank KO’L’ at K point. The output crank KO’L’ is coaxially arranged with the operating handle 31, and the output crank KO’L’ can rotate relative to the second mounting plate 322 around O’ point. The output shaft LL’ is fixedly connected with the output crank KO’L’ at L point. The first mounting plate 321 is provided with a first sliding slot 3211, and the second mounting plate 322 is provided with a second sliding slot 3221. As shown in Figure 15 and Figure 17 As shown, the output shaft LL’ passes through the first sliding slot 3211 and the second sliding slot 3221, and the output shaft LL’ can simultaneously slide in the first sliding slot 3211 and the second sliding slot 3221. One end of the first spring 323 is fixedly connected with the rocker arm FG at P point. The upper connecting rod HJ and the lower connecting rod JK are rotatably connected with a rotating shaft at J point, and the other end of the first spring 323 can be fixedly connected with the rotating shaft at J point.

[0142] As shown in Figure 5 and Figure 6 The operating mechanism 32 further includes a drive crank 324, which is located on the side of the second mounting plate 322 away from the first mounting plate 321. The drive crank 324 is coaxially arranged with the operating handle 31, and the drive crank 324 can rotate relative to the second mounting plate 322 around O’ point. One end of the output shaft LL’ passes through the second sliding slot 3221 and is fixedly connected with the drive crank 324, so that when the output shaft LL’ slides in the second sliding slot 3221, the drive crank 324 follows the output shaft LL’ to rotate around O’ point. The drive crank 324 is fixedly connected with the movable contact 331, so that the drive crank 324 can drive the movable contact 331 to rotate.

[0143] In one embodiment, the pulling rod 34 is provided with a reset member for driving the locking assembly to rotate from the second position to the first position, so that the locking rod 35 is buckled with the pulling rod 34 when the operating handle 31 drives the operating mechanism 32 to move. In this way, after the first tripping device 36 and the second tripping device 37 are separated from the pulling rod 34, 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 35 to be buckled with the jumper HE again, so that the switch device 30 can be closed and opened.

[0144] The first tripping device 36 comprises a first driving component 360. The first tripping device 36 is configured to drive the first driving component 360 to drive the locking assembly to rotate from the first position to the second position according to the first driving signal, so as to keep the locking assembly and the hook HE in a disengaged state. When the operating handle 31 drives the rocker arm FG to rotate towards the first tripping device 36, the reset driving component moves towards the first driving component 360 and drives the first driving component 360 to reset, so as to enable the locking assembly to reset from the second position to the first position. While the operating handle 31 drives the rocker arm FG to rotate towards the first tripping device 36, the rocker arm FG can drive the hook HE to rotate towards the locking assembly, so as to enable the operating handle 31 to control the operating mechanism 32 to drive the movable contact 331 to move. The second tripping device 37 comprises a second driving component 370. The second tripping device 37 is configured to lock the movement of the operating mechanism 32 according to the second driving signal, so as to prevent the operating handle 31 from controlling the operating mechanism 32 to drive the movable contact 331 to move, and keep the movable contact 331 and the static contact in a separated state.

[0145] The closing, opening and tripping of the switch device 30 will be described in detail below.

[0146] Figure 19 A schematic view of the switch device in a closed state according to an embodiment of the present application is shown in FIG. 1. Figure 20 A schematic view of the switch device in a closed state according to an embodiment of the present application is shown in FIG. 1. Figure 19 A schematic view of the switch device in a closed state according to an embodiment of the present application is shown in FIG. 1. Figure 19 A schematic view of the switch device in a closed state according to an embodiment of the present application is shown in FIG. 1. Figure 20 A schematic view of the switch device in a closed state according to an embodiment of the present application is shown in FIG. 1. Figure 20 If the rocker arm FG continues to rotate clockwise around the point G from the position shown in FIG. 1, the point P 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 first spring 323, i.e., the point K has a tendency to move clockwise around the point O', so that the output crank KO' L' has a tendency to rotate clockwise around the point O'. However, the first sliding groove 3211 and the second sliding groove 3221 limit the rotation of the output shaft LL', and thus limit the movement of the output crank KO' L', the lower link JK, the upper link HJ and the rocker arm FG in sequence, so that the rocker arm FG remains in the position shown in FIG. 1, maintaining the closed state of the switch device 30. Figure 20

[0147] Figure 21 ​A schematic view of the switch device provided in the embodiments of the present application in an open state, Figure 22 A partial schematic view of the switch device in the embodiments of the present application. As shown in Figure 21 and Figure 21 and Figure 22 shown, the switch device 30 is in an 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 352 hooks the groove 351, so that the locking lever 35 is engaged with the trip lever HE. In this way, the trip lever HE is kept stationary.

[0148] 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 upper right, thereby driving the rocker FG to rotate counterclockwise around the G point. In the process of counterclockwise rotation of the rocker FG around the G point, the P point of the first spring 323 moves from the right side of the upper link HJ to the left side of the upper link HJ. When the P point is located on the left side of the upper link HJ, the first spring 323 exerts a leftward force on the rotation axis of the J point, thereby driving the J point to move to the upper left, 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 driving the moving contact 331 to rotate clockwise and separate from the stationary contact.

[0149] 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 clockwise rotation of the input crank COD, the D point moves to the left and the F point moves to the lower left, thereby driving the rocker FG to rotate clockwise around the G point. In the process of clockwise rotation of the rocker FG around the G point, the P point of the first spring 323 moves from the left side of the upper link HJ to the right side of the upper link HJ. When the P point is located on the right side of the upper link HJ, the first spring 323 exerts a rightward force on the rotation axis of the J point, thereby driving the J point to move to the lower right, and further driving the lower link JK to rotate clockwise. In the process of clockwise rotation of the lower link JK, the output crank KO’L’ rotates counterclockwise around the O’ point, thereby driving the moving contact 331 to rotate counterclockwise and contact the stationary contact.

[0150] Figure 23 A schematic view of the switch device provided in the embodiments of the present application in a tripped state, Figure 24 A partial schematic view of the switch device in the embodiments of the present application. As shown in Figure 23 and Figure 23 and Figure 24As shown, the switch device 30 is in the tripped state, and the moving contact 331 and the stationary contact are separated. At this time, the traction rod 34 is in the second position, and the hook 352 is disengaged from the groove 351, so that the locking rod 35 is disengaged from the trip latch HE. When the switch device 30 is switched from the closed state to the tripped state, the first trip unit 36 and / or the second trip unit 37 drives the traction rod 34 to rotate counterclockwise around point A, so that the force of the traction rod 34 abutting against the locking rod 35 is reduced, so that the locking rod 35 rotates counterclockwise around point B, and then the locking rod 35 is disengaged from the trip latch HE. At the moment when the trip latch HE is disengaged from the locking rod 35, the trip latch HE rotates clockwise around point E, so that point H moves to the right. In the process of the clockwise rotation of the trip latch HE, the upper connecting rod HJ is driven to move clockwise, so that point J moves to the upper left, and then the lower connecting rod JK moves counterclockwise. In the process of the counterclockwise movement of the lower connecting rod JK, the output crank KO’L’ rotates clockwise around point O’, so that the moving contact 331 rotates clockwise and is separated from the stationary contact, and the tripping of the switch device 30 is realized.

[0151] When the switch device 30 is switched from the tripped state to the open state, the reset of the first driving component 360 and the engagement of the locking rod 322 and the trip latch HE are simultaneously realized by rotating the operating handle 31. Specifically, the operating handle 31 is driven to rotate counterclockwise around point O, so that the input crank COD follows the operating handle 31 to rotate counterclockwise around point O. In the process of the counterclockwise rotation of the input crank COD, point D moves to the right and point F moves to the upper right, and then the rocker arm FG rotates counterclockwise around point G. In the process of the counterclockwise rotation of the rocker arm FG, the reset driving part 328 drives the first driving component 360 of the first trip unit 36 to reset; at the same time, the rocker arm FG drives the trip latch HE to rotate counterclockwise around point E through the first spring 323, so that the hook 3222 hooks the groove 3221, and the locking rod 322 is engaged with the trip latch HE. In this way, the switch device 30 is switched from the tripped state to the open state.

[0152] In the switch device 30 of the present application, when the latch assembly is in the first position, the traction rod 34 can abut against the latch rod 35 and keep the latch rod 35 engaged with the jumper HE, so that the operating handle 31 can control the operating mechanism 32 to drive the movable contact 331 to move, thereby making the movable contact 331 contact or separate from the static contact. When the latch assembly is in the second position, the latch rod 35 is disengaged from the jumper HE, so that the operating handle 31 is disengaged from the operating mechanism 32, thereby making the operating handle 31 unable to control the operating mechanism 32 to drive the movable contact 331, and making the movable contact 331 keep separated from the static contact. When an external fault occurs in the inverter, the controller 21 sends a first driving signal to the switch device 30. The first tripping device 36 is configured to drive the latch assembly to rotate from the first position to the second position according to the first driving signal, so that the latch rod 35 keeps disengaged from the jumper HE. In this way, the operating handle 31 is unable to control the operating mechanism 32 to drive the movable contact 331 to move, thereby making the movable contact 331 keep separated from the static contact. Before the fault is solved, driving the operating handle 31 can make the rocker arm FG reset the first driving component 360, thereby making the latch assembly able to reset from the second position to the first position, so that the latch rod 35 can be engaged with the jumper HE when the operating handle 31 drives the operating mechanism 32 to move. Therefore, after the user detects or the system self-checks, and after other faults are solved, the user or the system can close the switch device 30 by themselves, thereby restoring the electrical connection between the photovoltaic assembly and the inverter circuit.

[0153] When an internal fault occurs in the inverter, the controller 21 sends a second driving signal to the switch device 30. The second tripping device 37 is configured to drive the latch assembly to rotate from the first position to the second position according to the second driving signal, so that the latch rod 35 keeps disengaged from the jumper HE. In one embodiment, when the fault is solved, driving the operating handle 31 can make the rocker arm FG reset the second driving component 370, thereby making the latch assembly able to reset from the second position to the first position, so that the latch rod 35 can be engaged with the jumper HE when the operating handle 31 drives the operating mechanism 32 to move. In another embodiment, when the fault is solved, the controller 21 sends a reset signal to the switch device 30. The second tripping device 37 is configured to reset the second driving component 370 according to the reset signal, so that the latch assembly is able to reset from the second position to the first position, so that the latch rod 35 can be engaged with the jumper HE when the operating handle 31 drives the operating mechanism 32 to move. Therefore, after the maintenance personnel solve the internal fault, the maintenance personnel can close the switch device 30, thereby restoring the electrical connection between the photovoltaic assembly and the inverter circuit. In this way, the user can avoid closing the switch device 30 without solving the internal problem, thereby preventing the inverter from being damaged.

[0154] The second tripping device 37 can realize the tripping of the operating handle 31 and the operating mechanism 32 by switching the position of the locking assembly. The second driving component 370 drives the traction rod 34 in a similar principle to the first driving component 360, which will not be repeated here. When the switch device 30 is switched from the tripped state to the off state, the reset of the second driving component 370 and the locking of the hook rod 322 and the hook HE are realized by rotating the operating handle 31. Specifically, the operating handle 31 is driven to rotate counterclockwise around the O point, thereby driving the input crank COD to rotate counterclockwise around the O point. During the counterclockwise rotation of the input crank COD, the D point moves to the right and the F point moves to the upper right, thereby driving the rocker arm FG to rotate counterclockwise around the G point. During the counterclockwise rotation of the rocker arm FG, the reset driving component 328 drives the second driving component 370 of the second tripping device 37 to reset; at the same time, the rocker arm FG drives the hook HE to rotate counterclockwise around the E point through the first spring 323, so that the hook 3222 hooks the groove 3221, and the hook rod 322 and the hook HE are locked. In this way, the switch device 30 is switched from the tripped state to the off state. In another embodiment, the second tripping device 37 can also realize the tripping of the switch device 30 by locking the movement of the transmission assembly. In this embodiment, when the inverter fails internally and / or externally, the controller 21 sends a driving signal to the switch device 30, and the first tripping device 36 drives the traction rod 34 to rotate according to the corresponding driving signal. The second tripping device 37 locks the transmission assembly according to the corresponding driving signal.

[0155] In the embodiments of the present application, the first tripping device 36 and the second tripping device 37 can both be electromagnetic tripping devices. Figure 25 A schematic diagram of the electromagnetic tripping device provided in the embodiments of the present application, Figure 26 A schematic diagram of the electromagnetic tripping device provided in the embodiments of the present application. As Figure 25 and Figure 26As shown, the electromagnetic trip unit 41 may include a moving iron core 411, a stationary iron core 412, a first permanent magnet 413, a first coil 414, and a second spring 415. The stationary iron core 412 has a first receiving space. One end of the moving iron core 411, the first permanent magnet 413, and the first coil 414 are located within the first receiving space. The first permanent magnet 413 is located at one end of the moving iron core 411, and the first coil 414 is sleeved on the moving iron core 411. The other end of the moving iron core 411 extends out of the first receiving space and is positioned towards the traction rod 34. The second spring 415 is sleeved on the other end of the moving iron core 411. One end of the second spring 415 is fixed relative to the stationary iron core 412, and the other end of the second spring 415 is fixed relative to the other end of the moving iron core 411. The electromagnetic trip unit 41 is used to energize the first coil 414 and generate a first induced magnetic field opposite to the magnetic field direction of the first permanent magnet 413 according to the first drive signal and / or the second drive signal, so that the moving iron core 411 moves toward the traction rod 34 under the action of the second spring 415. Figure 25 and Figure 26 (In the vertically upward direction), and drive the locking assembly to rotate from the first position to the second position. In this embodiment, the first trip unit 36 ​​can be an electromagnetic trip unit 41, or the second trip unit 37 can be an electromagnetic trip unit 41, or both the first trip unit 36 ​​and the second trip unit 37 can be electromagnetic trip units 41. The electromagnetic trip unit 41 is in the initial state (e.g., in the vertically upward direction), and drives the locking assembly to rotate from the first position to the second position. Figure 25 When the first permanent magnet 413 magnetically attracts the moving iron core 411 and compresses the second spring 415, the first induced magnetic field generated by the first coil 414 cancels out the magnetic field of the first permanent magnet 413. Therefore, the second spring 415 drives the other end of the moving iron core 411 to move away from the stationary iron core 412, thereby causing the moving iron core 411 to move toward the traction rod 34 (as shown). Figure 26 (As shown). When the first drive signal or the second drive signal disappears, the first coil 414 is not energized, and the moving iron core 411 remains in the position abutting against the traction rod 34. When the switching device 30 receives the first reset signal or the second reset signal, it can manually drive the moving iron core 411 to move in the opposite direction, so that the first permanent magnet 413 magnetically attracts the moving iron core 411 and compresses the second spring 415.

[0156] In one embodiment, the moving iron core 411 of the second trip unit 37 can lock the movement of the transmission component. Figure 27 This is a partial schematic diagram of the second trip unit and operating mechanism provided in an embodiment of this application. Figure 27As shown in another embodiment, the second tripping device 37 is located on the side of the second mounting plate 322 away from the first mounting plate 321, and the other end of the moving iron core 411 is arranged towards the second mounting plate 322. When the moving iron core 411 of the second tripping device 37 moves away from the static iron core 412, the moving iron core 411 extends into the space between the rocker arm FG and the first mounting plate 321, or extends into the space between the rocker arm FG and the second mounting plate 322, so as to limit the rotation of the rocker arm FG, thereby locking the position of the rocker arm FG. Figure 28 Another partial schematic view of the second tripping device and operating mechanism provided in the embodiments of the present application is shown. As shown in Figure 28 As shown in another embodiment, the second tripping device 37 is located on the side of the second mounting plate 322 away from the first mounting plate 321, and the other end of the moving iron core 411 is arranged towards the second mounting plate 322. When the moving iron core 411 of the second tripping device 37 moves away from the static iron core 412, the moving iron core 411 extends into the first sliding groove 3211 or the second sliding groove 322, so as to limit the sliding of the output shaft LL' in the first sliding groove 3211 or the second sliding groove 322, thereby locking the position of the output shaft LL'.

[0157] In another embodiment, the second tripping device 37 can be a bistable tripping device. Figure 29 Another partial schematic view of the second tripping device provided in the embodiments of the present application is shown. As shown in Figure 29 As shown, the second tripping device 37 includes a coil winding 371, a first magnetic yoke 372, a second magnetic yoke 373, and a driving assembly 374. The coil winding 371 is fixed relative to the housing. The first magnetic yoke 372 and the second magnetic yoke 373 are arranged at two ends of the coil winding 371. The driving assembly 374 includes a magnetic assembly 3741 fixedly connected and a driving component 3742. The magnetic assembly 3741 is located between the first magnetic yoke 372 and the second magnetic yoke 373, and includes a first magnetic pole portion 37411 and a second magnetic pole portion 37412 arranged opposite to each other and having opposite magnetic poles. An end of the first magnetic yoke 372 away from the coil winding 371 extends to between the first magnetic pole portion 37411 and the second magnetic pole portion 37412, and an end of the second magnetic yoke 373 away from the coil winding 371 extends to between the first magnetic pole portion 37411 and the second magnetic pole portion 37412. The driving component 3742 is in transmission connection with the traction rod 34. Figure 30 Another partial schematic view of the second tripping device provided in the embodiments of the present application is shown. As shown in Figure 30As shown, the second tripping device 37 is configured to, according to the second driving signal, energize the coil winding 371 to generate a first induced magnetic field, so that the first magnetic yoke 372 generates an attractive force on the first magnetic pole part 37411 and a repulsive force on the second magnetic pole part 37412, and the second magnetic yoke 373 generates a repulsive force on the first magnetic pole part 37411 and an attractive force on the second magnetic pole part 37412, to drive the magnetic assembly 3741 to rotate in the first rotation direction and drive the driving component 3742 to move, so that the driving component 3742 abuts against the traction rod 34 and drives the locking assembly to rotate from the first position to the second position. Figure 31 Another schematic diagram of the second tripping device provided in the embodiments of the present application is shown in FIG. 6. As shown in FIG. 6, Figure 31 As shown, the second tripping device 37 is also configured to, according to the second reset signal, energize the coil winding 371 to generate a second induced magnetic field, so that the first magnetic yoke 372 generates a repulsive force on the first magnetic pole part 37411 and an attractive force on the second magnetic pole part 37412, and the second magnetic yoke 373 generates an attractive force on the first magnetic pole part 37411 and a repulsive force on the second magnetic pole part 37412, to drive the magnetic assembly 3741 to rotate in the second rotation direction and drive the driving component 3742 to move, so that the locking assembly can be reset from the second position to the first position. In this embodiment, when an internal fault occurs in the inverter, even if the operating handle 31 is operated, the second tripping device 37 will still make the locking rod 35 disengage from the jump ring HE, so that the operating mechanism 32 cannot drive the movable contact 331 to move, resulting in that the switch device 30 cannot be closed, thereby improving the stability of the switch device 30 in the tripped state. After the internal fault is solved, the locking assembly can be reset to the first position and remain in the first position. Therefore, when the operating handle 31 drives the operating mechanism 32 to move, the locking rod 35 can be engaged with the jump ring HE, so that the closing and opening of the switch device 30 can be realized through the operating handle 31, thereby improving the stability of the switch device 30 in the normal working state. By changing the current direction of the coil winding 371 when energized, the stability of the switch device 30 in the tripped state and the normal working state can be realized, thereby realizing the bistability of the switch device 30.

[0158] In the switch device 30 described above, the driving component 3742 includes a rotating rod 37421 and a push rod 37422. The rotating rod 37421 rotates relative to the housing, the rotating rod 37421 is fixedly connected with the magnetic assembly 3741, and the rotating rod 37421 is movably connected with the push rod 37422. The push rod 37422 is movably connected with the housing. The magnetic assembly 3741 is configured to drive the rotating rod 37421 to rotate, so as to drive the push rod 37422 to move towards the traction rod 34 and abut against the traction rod 34, thereby driving the locking assembly to rotate from the first position to the second position, and drive the push rod 37422 to move away from the traction rod 34 and disengage from the traction rod 34, so that the locking assembly can be reset from the second position to the first position. In this embodiment, the induced magnetic field generated by the coil winding 371 acts on the first magnetic pole portion 37411 and the second magnetic pole portion 37412 through the first magnetic yoke 372 and the second magnetic yoke 373, so as to drive the magnetic assembly 3741 to move. During the movement of the magnetic assembly 3741, the rotating rod 37421 rotates with the magnetic assembly 3741, and drives the push rod 37422 to slide, i.e. converts the rotating motion into sliding motion, so that the push rod 37422 moves towards or away from the traction rod 34.

[0159] The movable connection between the push rod 37422 and the rotating rod 37421 described above can be achieved by simple structural design. In one embodiment, the push rod 37422 has an opening, and the rotating rod 37421 has a protrusion. The protrusion is accommodated in the opening, and the movable connection between the push rod 37422 and the rotating rod 37421 is achieved by rotation in the opening.

[0160] Figure 32 Another schematic view of the second tripping device provided in the embodiments of the present application, Figure 33 Another schematic view of the second tripping device provided in the embodiments of the present application. As Figure 32 and Figure 33 As shown in another embodiment, the driving component 3742 includes a rotating rod 37421. The rotating rod 37421 rotates relative to the housing, the rotating rod 37421 is fixedly connected with the magnetic assembly 3741, and the rotating rod 37421 is fixed relative to the traction rod 34. The magnetic assembly 3741 is configured to drive the rotating rod 37421 to rotate, so as to drive the locking assembly to rotate from the first position to the second position, and drive the locking assembly to rotate from the second position to the first position. In this embodiment, the induced magnetic field generated by the coil winding 371 acts on the first magnetic pole portion 37411 and the second magnetic pole portion 37412 through the first magnetic yoke 372 and the second magnetic yoke 373, so as to drive the magnetic assembly 3741 to move. During the movement of the magnetic assembly 3741, the rotating rod 37421 rotates with the magnetic assembly 3741, and directly drives the traction rod 34 to rotate, thereby directly driving the locking assembly to rotate between the first position and the second position.

[0161] Figure 34 Another schematic view of the second tripping device provided in the embodiments of the present application, Figure 35 Figure 34 An exploded schematic view of the second tripping device. As shown in Figure 34 Figure 35 In another embodiment, the bistable tripping device of the second tripping device 37 can also have other structures. Specifically, the second tripping device 37 includes a moving shaft 375, a second coil 376, a third coil 377, a second permanent magnet 378 and a third permanent magnet 379. The moving shaft 375 is relatively slidably connected to the housing, and the moving shaft 375 is drivingly connected to the traction rod 34. The second coil 376 and the third coil 377 are connected in series and are arranged around the outer periphery of the moving shaft 375. The second permanent magnet 378 and the third permanent magnet 379 are relatively fixed to the housing, and the second permanent magnet 378 and the third permanent magnet 379 are located between the second coil 376 and the third coil 377. Along the sliding direction of the moving shaft 375, the second permanent magnet 378 and the third permanent magnet 379 are located on both sides of the moving shaft 375. The magnetic circuit direction in the second permanent magnet 378 is opposite to the magnetic circuit direction in the third permanent magnet 379 and is perpendicular to the sliding direction. Figure 36 Another schematic view of the second tripping device provided in the embodiments of the present application. As shown in Figure 36 ​​As shown, in the part of the moving shaft 375 located on the side of the second permanent magnet 378 facing the second coil 376, the magnetic path direction of the magnetic field generated by the second permanent magnet 378 and the third permanent magnet 379 is the first direction. In the part of the moving shaft 375 located on the side of the second permanent magnet 378 facing the third coil 377, the magnetic path direction of the magnetic field generated by the second permanent magnet 378 and the third permanent magnet 379 is the second direction. The first direction is opposite to the second direction, and the first direction and the second direction are parallel to the sliding direction. The second tripper 37 is configured to, according to the second driving signal, cause the second coil 376 and the third coil 377 to be energized and generate a first induced magnetic field, so that the magnetic path direction of the first induced magnetic field in the moving shaft 375 is the same as the first direction and opposite to the second direction, so that the moving shaft 375 slides along the first direction and abuts against the traction rod 34, thereby causing the locking assembly to rotate from the first position to the second position. The second tripper 37 is also configured to, according to the second reset signal, cause the second coil 376 and the third coil 377 to be energized and generate a second induced magnetic field, so that the magnetic path direction of the second induced magnetic field in the moving shaft 375 is the same as the second direction and opposite to the first direction, so that the moving shaft 375 slides along the second direction and is disengaged from the traction rod 34, thereby enabling the locking assembly to reset from the second position to the first position. In this embodiment, when an internal fault occurs, even if the operating handle 31 is operated, the tripper will disengage the traction rod 34 from the locking rod 35, so that the operating mechanism 32 cannot drive the movable contact 331 to move, causing the switch device 30 to be unable to close, thereby improving the stability of the switch device 30 in the tripped state. After the internal fault is resolved, the locking assembly can reset to the first position and remain in the first position. Therefore, when the operating handle 31 drives the operating mechanism 32 to move, the locking rod 35 can be engaged with the trip HE, thereby achieving the closing and opening of the switch device 30 through the operating handle 31, thereby improving the stability of the switch device 30 in the normal working state. By changing the current direction of the coil winding when energized, the stability of the switch device 30 in the tripped state and the normal working state can be achieved, thereby realizing the bistability of the switch device 30.

[0162] In the switch device 30 described above, the second tripping device 37 can further include a mounting plate 380 and a third magnetic yoke 381. The mounting plate 380 is fixed relative to the housing, and the third magnetic yoke 381 is a U-shaped magnetic yoke. The mounting plate 380 covers an opening of the U-shaped magnetic yoke and forms a second accommodating space. The moving shaft 375, the second coil 376, the third coil 377, the second permanent magnet 378, and the third permanent magnet 379 are located in the second accommodating space. In one embodiment, the mounting plate 380 is located at a side of the U-shaped magnetic yoke close to the traction rod 34, and the mounting plate 380 is provided with a first opening 3801. One end of the moving shaft 375 passes through the first opening 3801 and extends out of the second accommodating space. In another embodiment, the mounting plate 380 is located at a side of the U-shaped magnetic yoke away from the traction rod 34. The U-shaped magnetic yoke includes two side walls arranged in parallel and a bottom wall connecting the two side walls, and the bottom wall is arranged opposite to the mounting plate 380. The bottom wall is provided with a second opening 3811. One end of the moving shaft 375 passes through the second opening 3811 and extends out of the second accommodating space. In another embodiment, the mounting plate 380 is provided with the first opening 3801. The U-shaped magnetic yoke includes two side walls arranged in parallel and a bottom wall connecting the two side walls, and the bottom wall is arranged opposite to the mounting plate 380. The bottom wall is provided with the second opening 3811. One of the first opening 3801 and the second opening 3811 is arranged close to the traction rod 34. One end of the moving shaft 375 passes through the first opening 3801 and extends out of the second accommodating space, and the other end passes through the second opening 3811 and extends out of the second accommodating space. In the above-described embodiments, when the second coil 376 and the third coil 377 are energized, the third magnetic yoke 381 can spread the induced magnetic field generated by the second coil 376 and the third coil 377 to the entire second accommodating space, so that the induced magnetic field can cover the moving shaft 375 described above.

[0163] Similarly, when the second trip unit 37 is a bistable trip unit, in one embodiment, the lever 37422 or the moving shaft 375 of the second trip unit 37 can directly switch the position of the traction rod 34. In another embodiment, the lever 37422 or the moving shaft 375 of the second trip unit 37 can extend between the rocker arm FG and the first mounting plate 321, or between the rocker arm FG and the second mounting plate 322, to limit the rotation of the rocker arm FG, thereby locking the position of the rocker arm FG. In another embodiment, when the moving iron core 411 of the second trip unit 37 moves away from the stationary iron core 412, the lever 37422 or the moving shaft 375 of the second trip unit 37 can extend into the first slide groove 3211 or the second slide groove 322 to limit the sliding of the output shaft LL' within the first slide groove 3211 or the second slide groove 322, thereby locking the position of the output shaft LL'. In another embodiment, the rotating rod 37421 of the second trip unit 37 can be fixedly connected to the rocker arm FG, thereby directly limiting the rotation of the rocker arm FG through the rotating rod 37421, thus locking the position of the rocker arm FG. In another embodiment, the rotating rod 37421 of the second trip unit 37 can be fixedly connected to the output shaft LL', thereby directly limiting the sliding of the output shaft LL' within the first slide groove 3211 and the second slide groove 322 through the rotating rod 37421, thus locking the position of the output shaft LL'.

[0164] Figure 37 This is a schematic diagram showing the second trip unit being powered on, as provided in an embodiment of this application. Figure 37 As shown, when the second trip unit 37 receives the second reset signal, the second coil 376 and the third coil 377 are energized, and the current direction of the coils is the first current direction. In this embodiment, the magnetic field generated by the second coil 376 and the third coil 377 has the same magnetic circuit direction in the moving shaft 375 as the first direction. Thus, the induced magnetic field generated by the second coil 376 and the third coil 377 acts on the third force F3 in the moving shaft 375, part of which is superimposed on the first force F1, and the other part is canceled out by the second force F2 (as shown by the dashed arrow). Thus, the superimposed force is greater than the canceled force, which can make the moving shaft 375 slide along the first direction and remain in contact with the locking assembly, so that the locking assembly is disengaged and unlocked from the trip unit HE.

[0165] Figure 38 Another power-on schematic diagram of the second trip unit provided in an embodiment of this application. (See diagram below.) Figure 38As shown, when the second trip device 37 receives the second driving signal, the second coil 376 and the third coil 377 are energized, and the current direction of the coils is the second current direction. The first current direction is opposite to the second current direction, and thus the second coil 376 and the third coil 377 generate different induced magnetic fields after the circuit fault and the fault is solved, so as to drive the moving shaft 375 to move differently, and thus the second trip device 37 can distinguish the second driving signal and the second reset signal by setting the current direction. In this embodiment, the magnetic path direction of the induced magnetic field generated by the second coil 376 and the third coil 377 in the moving shaft 375 is the same as the second direction. In this way, the induced magnetic field generated by the second coil 376 and the third coil 377 acts on the third force F3 in the moving shaft 375, a part of which is superimposed with the second force F2, and another part of which is canceled with the first force F1 (as shown by the dashed arrow). In this way, the superimposed force is greater than the canceled force, so as to make the moving shaft 375 slide along the second direction and be kept at the second position, so as to lock the locking operation mechanism 32. In this way, the second trip device 37 keeps the locking operation state before the fault is removed, and the manual operation cannot be closed, so as to ensure the safety of the circuit.

[0166] The magnetic path direction of the magnetic field generated by the second permanent magnet 378 in the second permanent magnet 378 is opposite to the magnetic path direction of the magnetic field generated by the third permanent magnet 379 in the third permanent magnet 379, and can specifically include that, in an embodiment, the magnetic pole of the end of the second permanent magnet 378 facing the third permanent magnet 379 is an N pole, and the magnetic pole of the end of the third permanent magnet 379 facing the second permanent magnet 378 is an N pole. In an embodiment, the magnetic pole of the end of the second permanent magnet 378 facing the third permanent magnet 379 is an S pole, and the magnetic pole of the end of the third permanent magnet 379 facing the second permanent magnet 378 is an S pole.

[0167] It should be noted that in the embodiments of the present application, the switch device 30 can be an isolating switch, and can also be a circuit breaker, a load switch, or other types of switches.

[0168] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within 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, a first tripping device and a second tripping device, wherein: The operating handle is connected with the operating mechanism, and the operating mechanism is connected with the moving contact; at least a part of the operating handle close to the operating mechanism, the operating mechanism, the moving contact, the static contact, the first tripping device and the second 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 and a rocker arm, and the jump buckle, the rocker arm and the lock assembly are respectively relatively rotatable with the shell; the jump buckle is in transmission connection with the rocker arm; the operating handle and the moving contact are respectively in transmission connection with the rocker arm; the rocker arm is provided with a reset driving part; When the lock assembly is located at 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 located at 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 to move, and the moving contact keeps in a separated state from the static contact; The first tripping device comprises a first driving part; the first tripping device is used for driving the first driving part to drive the lock assembly to rotate from the first position to the second position according to a first driving signal, so that the lock assembly is tripped from the jump buckle; when the operating handle drives the rocker arm to rotate in a direction close to the first tripping device, the reset driving part moves towards the first driving part and drives the first driving part to reset, so that the lock assembly can be reset from the second position to the first position; at the same time, the rocker arm drives the jump buckle to rotate towards the lock assembly, so that the jump buckle is engaged with the lock assembly, so that the operating handle can control the operating mechanism to drive the moving contact to move; The second tripping device comprises a second driving part; the second tripping device is used for locking the movement of the operating mechanism according to a second driving signal, so that the operating handle cannot control the operating mechanism to drive the moving contact to move, and the moving contact keeps in a separated state from the static contact.

2. The switching device of claim 1, wherein The second tripping device is used for driving the second driving part to drive the lock assembly to rotate from the first position to the second position according to the second driving signal, so that the lock assembly keeps in a tripped state from the jump buckle.

3. The switching device of claim 1, wherein The transmission assembly further comprises a first mounting plate, a second mounting plate and an output shaft, wherein: The first mounting plate and the second mounting plate are oppositely arranged, the operating handle passes through the first mounting plate and the second mounting plate and rotates relative to the first mounting plate and the second mounting plate, the rocker arm is located between the first mounting plate and the second mounting plate and is rotationally connected to the first mounting plate and the second mounting plate, and the rocker arm is drivingly connected to the movable contact through the output shaft. The first mounting plate is provided with a first sliding groove, the second mounting plate is provided with a second sliding groove, one end of the output shaft is accommodated in the first sliding groove, and the other end of the output shaft is accommodated in the second sliding groove, when the operating handle drives the rocker arm to rotate, the rocker arm drives the output shaft to slide in the first sliding groove and the second sliding groove, thereby driving the movable contact to move, the second trip device is used for driving the second driving component to extend between the rocker arm and the first mounting plate or between the rocker arm and the second mounting plate according to the second driving signal, so that the rocker arm cannot rotate, thereby locking the movement of the transmission assembly, and so that the operating handle cannot control the operating mechanism to drive the movable contact to move, or The second trip device is used for driving the second driving component to extend into the first sliding groove or the second sliding groove according to the second driving signal, so as to lock the sliding of the output shaft in the first sliding groove and the second sliding groove, so that the rocker arm cannot rotate, thereby locking the movement of the transmission assembly, and so that the operating handle cannot control the operating mechanism to drive the movable contact to move. The first trip device further comprises a first coil assembly, a first permanent magnet assembly and a first spring, the first spring is connected to the first driving component, the first permanent magnet assembly generates a first magnetic field to exert a first acting force on the first driving component, the first coil assembly is used for being electrified according to the first driving signal, so that the first coil assembly generates a first induced magnetic field to exert a second acting force on the first driving component, and the second acting force counteracts the first acting force, thereby driving the first driving component to move towards the locking assembly by the first spring, and driving the locking assembly to rotate from the first position to the second position.

4. The switch device according to any one of claims 1 to 3, wherein The first driving component comprises a first movable iron core, the first permanent magnet assembly comprises a first permanent magnet, and the first coil assembly comprises a first coil.

5. The switching device of claim 4, wherein The first trip device further comprises a first static iron core, the first static iron core has a first accommodating space, one end of the first movable iron core, the first permanent magnet and the first coil are located in the first accommodating space, the first permanent magnet is located at the one end of the first movable iron core, and the first coil is sleeved on the first movable iron core, the other end of the first movable iron core extends out of the first accommodating space and is arranged towards the locking assembly, the first spring is sleeved on the other end of the first movable iron core, one end of the first spring is fixed relative to the first static iron core, and the other end of the first spring is fixed relative to the other end of the first movable iron core. ​ When the first coil is energized, the first induced magnetic field generated by the first coil is opposite to and counteracts the first magnetic field direction of the first permanent magnet, so that the first moving iron core moves away from the first static iron core under the action of the first spring; When the operating handle drives the rocker arm to rotate towards the first tripping device, the reset driving part drives the first moving iron core to reset, so that the first permanent magnet magnetically attracts the first moving iron core, and the first moving iron core presses the first spring.

6. The switch device according to any one of claims 1 to 3, wherein The second tripping device further comprises a second coil assembly, a second permanent magnet assembly and a second spring, the second spring being connected with the second driving part; the second permanent magnet assembly generates a second magnetic field to apply a third acting force to the second driving part, and the second coil assembly is energized according to the second driving signal, so that the second induced magnetic field generated by the second coil assembly applies a fourth acting force to the second driving part, and the fourth acting force counteracts the third acting force, so that the second spring drives the second driving part to move towards the locking assembly, and drives the locking assembly to rotate from the first position to the second position.

7. The switching device of claim 6, wherein The second driving part comprises a second moving iron core, the second permanent magnet assembly comprises a second permanent magnet, and the second coil assembly comprises a second coil; The second tripping device further comprises a second static iron core, the second static iron core having a second accommodating space, one end of the second moving iron core, the second permanent magnet and the second coil being located in the second accommodating space, the second permanent magnet being located at the one end of the second moving iron core, and the second coil being sleeved on the second moving iron core; the other end of the second moving iron core extends out of the second accommodating space and is arranged towards the locking assembly; the second spring is sleeved on the other end of the second moving iron core, one end of the second spring being fixed opposite to the second static iron core, and the other end of the second spring being fixed opposite to the other end of the second moving iron core; When the second coil is energized, the second induced magnetic field generated by the second coil is opposite to and counteracts the second magnetic field direction of the second permanent magnet, so that the second moving iron core moves away from the second static iron core under the action of the second spring; When the operating handle drives the rocker arm to rotate towards the second tripping device, the reset driving part drives the second moving iron core to reset, so that the second permanent magnet magnetically attracts the second moving iron core, and the second moving iron core presses the second spring.

8. The switching device of any one of claims 1 to 3, wherein, The second tripping device further comprises a third coil assembly and a third permanent magnet assembly; the third permanent magnet assembly generates a third magnetic field to apply a fifth acting force to the second driving part; The third coil assembly is configured to be energized according to the second driving signal to generate a third induced magnetic field, and the third induced magnetic field exerts a sixth force on the second driving component, and a part of the sixth force counteracts the fifth force, so that the second driving component is driven to move towards the lock assembly under the action of another part of the sixth force, and the lock assembly is driven to rotate from the first position to the second position; The third coil assembly is also configured to be energized according to a reset signal to generate a fourth induced magnetic field, and the fourth induced magnetic field exerts a seventh force on the second driving component, and a part of the seventh force counteracts the fifth force, so that the second driving component is driven to reset under the action of another part of the seventh force.

9. The switching device of claim 8, wherein, The third coil assembly comprises a coil winding, a first magnetic yoke and a second magnetic yoke; the coil winding is fixed relative to the shell; the first magnetic yoke and the second magnetic yoke are oppositely arranged at two ends of the coil winding; the third permanent magnet assembly and the second driving component are fixedly connected; the third permanent magnet assembly is located between the first magnetic yoke and the second magnetic yoke, and comprises a first magnetic pole part and a second magnetic pole part, which are oppositely arranged 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, and 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 coil winding is configured to be energized according to the second driving signal to generate the third induced magnetic field, and the third induced magnetic field generates an attractive force on the first magnetic pole part through the first magnetic yoke and generates a repulsive force on the second magnetic pole part, and the third induced magnetic field generates a repulsive force on the first magnetic pole part through the second magnetic yoke and generates an attractive force on the second magnetic pole part, so as to drive the third permanent magnet assembly to rotate in a first rotation direction and drive the second driving component to move, thereby locking the movement of the operating mechanism; The coil winding is also configured to be energized according to the reset signal to generate the fourth induced magnetic field, and the fourth induced magnetic field generates a repulsive force on the first magnetic pole part through the first magnetic yoke and generates an attractive force on the second magnetic pole part, and the fourth induced magnetic field generates an attractive force on the first magnetic pole part through the second magnetic yoke and generates a repulsive force on the second magnetic pole part, so as to drive the third permanent magnet assembly to rotate in a second rotation direction and drive the second driving component to reset, thereby unlocking the movement of the operating mechanism.

10. The switching device of claim 9, wherein The driving component comprises a rotating rod and a push rod; the rotating rod rotates relative to the shell, the rotating rod is fixedly connected with the third permanent magnet assembly, and the rotating rod is movably connected with the push rod; the push rod is slidably connected with the shell; The third permanent magnet assembly is configured to drive the rotating rod to rotate, so as to drive the push rod to move towards the operating mechanism and drive the push rod to move away from the operating mechanism.

11. The switching device of claim 9, wherein, The driving component comprises a rotating rod; the rotating rod is opposite to the shell in rotation; the rotating rod is fixedly connected with the third permanent magnet assembly; The rotating rod is opposite to the lock catch assembly in fixation; the third permanent magnet assembly is used to drive the rotating rod to rotate, so as to make the lock catch assembly rotate from the first position to the second position, and make the lock catch assembly rotate from the second position to the first position; or, The rotating rod is opposite to the rocker in fixation; the third permanent magnet assembly is used to drive the rocker to rotate, so as to limit the movement of the rocker.

12. The switching device of claim 8, wherein, The driving component comprises a moving shaft, the third coil assembly comprises a third coil and a fourth coil, and the third permanent magnet assembly comprises a third permanent magnet and a fourth permanent magnet; the moving shaft is opposite to the shell in sliding; the moving shaft is in transmission connection with the operating mechanism; the third coil and the fourth coil are in series and are arranged on the outer periphery of the moving shaft; the third permanent magnet and the fourth permanent magnet are opposite to the shell in fixation, and are located between the third coil and the fourth coil; along the sliding direction of the moving shaft, the third permanent magnet and the fourth permanent magnet are opposite to each other and are located on both sides of the moving shaft; the magnetic path direction in the third permanent magnet is opposite to and perpendicular to the magnetic path direction in the fourth permanent magnet and is perpendicular to the sliding direction; In the part of the moving shaft on the side of the third permanent magnet facing the third coil, the magnetic path direction of the magnetic field generated by the third permanent magnet and the fourth permanent magnet is a first direction; in the part of the moving shaft on the side of the third permanent magnet facing the fourth coil, the magnetic path direction of the magnetic field generated by the third permanent magnet and the fourth permanent magnet is a second direction; wherein the first direction is opposite to the second direction, and the first direction and the second direction are parallel to the sliding direction; The third coil and the fourth coil are used to be electrified according to the second driving signal and generate the third induced magnetic field, so that the magnetic path direction of the third induced magnetic field in the moving shaft is the same as the first direction and opposite to the second direction, so that the moving shaft slides along the first direction and approaches the operating mechanism, thereby locking the movement of the operating mechanism; The third coil and the fourth coil are also used to be electrified according to the reset signal and generate the fourth induced magnetic field, so that the magnetic path direction of the fourth induced magnetic field in the moving shaft is the same as the second direction and opposite to the first direction, so that the moving shaft slides along the second direction and resets, thereby unlocking the movement of the operating mechanism.

13. The switching device of claim 12, wherein, The second tripping device further comprises a third mounting plate and a third magnetic yoke; the third mounting plate is opposite to the shell in fixation; the third magnetic yoke is a U-shaped magnetic yoke, the third mounting plate covers the opening of the U-shaped magnetic yoke and forms a third accommodating space; the moving shaft, the third coil, the fourth coil, the third permanent magnet and the fourth permanent magnet are located in the third accommodating space; The third mounting plate is located on one side of the U-shaped yoke close to the lock assembly, and is provided with a first opening through which one end of the moving shaft extends out of the third accommodating space; or The third mounting plate is located on one side of the U-shaped yoke away from the lock assembly; the U-shaped yoke comprises two side walls arranged in parallel and a bottom wall connecting the two side walls, and the bottom wall is arranged opposite to the third mounting plate; the bottom wall is provided with a second opening through which one end of the moving shaft extends out of the third accommodating space.

14. The switching device of any one of claims 1 to 3, wherein, The lock assembly comprises a pulling rod and a lock rod, and the pulling rod and the lock rod are respectively rotationally connected with the shell, and the pulling 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 pulling 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 pulling 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 pulling 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 pulling rod.

15. The switching device of any one of claims 1 to 3, wherein, The lock assembly is provided with a reset member; the reset member is used to drive the lock assembly to reset from the second position to the first position.

16. The switching device of any one of claims 1 to 3, wherein, The switch device comprises a circuit breaker or an isolating switch.

17. The switching device of any one of claims 1 to 3, wherein, The switch device comprises 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 are equal and one-to-one corresponding, and the plurality of moving contacts are respectively in transmission connection with the transmission assembly.

18. An inverter, characterized by, The inverter comprises an inverter circuit, a controller and the switch device according to any one of claims 1 to 17; the inverter circuit is electrically connected with the photovoltaic module through the switch device, and the switch 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 switch device; The controller is used to send a first driving signal to the switch device when a fault occurs outside the inverter, and a first tripping device of the switch device is used to drive the lock assembly to rotate from the first position to the second position according to the first driving signal, so that the lock assembly is separated from the jump buckle, and the moving contact is separated from the static contact, so as to turn off the electrical connection between the photovoltaic module and the inverter circuit; The controller is also used to send a second driving signal to the switch device when a fault occurs inside the inverter, and a second tripping device of the switch device is used to lock the movement of the operating mechanism according to the second driving signal, so that the operating handle cannot control the operating mechanism to drive the moving contact, and the moving contact and the static contact remain in a separated state, thereby turning off the electrical connection between the photovoltaic module and the inverter circuit.

19. The inverter of claim 18, wherein, The controller is further configured to send a reset signal to the switch device after a fault occurring inside the inverter is solved, and the second tripping device is configured to reset the second driving component according to the reset signal, to unlock the movement of the operating mechanism, so that the operating handle can control the operating mechanism to drive the movable contact, so that the movable contact is in contact with or separated from the static contact, to turn on or turn off the electrical connection between the photovoltaic module and the inverter circuit.

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