Load switch

Abstract

According to the load switch provided by the invention, corresponding current detection modules are respectively arranged in branches where switch controlled parts are located, and detected current detection signals can be output to a controller; and the controller can control the on-off of each switch controlled element through the magnetic flux tripping unit, so that when any current detection signal represents that the flow direction or the size of the current of the corresponding path is abnormal, the controller can control the on-off of each switch controlled element through the magnetic flux tripping unit. Namely, the system fault can be actively identified through current detection, protection is realized in time, and a protection element does not need to be added.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a load switch. Background Art

[0002] At present, inverters, especially string-type photovoltaic inverters, are increasingly adopting a multi-integration system, that is, a load switch is used to integrate multiple photovoltaic strings into the same input; however, in the multi-integration system, its protection function has different implementation methods.

[0003] For a multi-in-one system using a multi-pole rotary load switch, it is necessary to add protection elements such as fuses to each photovoltaic string to implement protection functions when the system has faults such as wrong connection, reverse connection, and multiple grounding points; this will lead to an increase in system components and increased costs.

[0004] In a multi-in-one system that uses a load switch that can remotely trip, the system detects the voltage and current of the line and then sends a trip signal to the load switch to achieve the system protection function. Although there is no need to add protection components, the time from the system detection, judgment and sending of signals to the system to the load switch tripping is relatively long, and the load switch cannot actively trip in the event of a fault. Utility Model Content

[0005] In view of this, the present application provides a load switch that can actively identify system faults, trip in time to perform protective actions, and does not require the addition of protective elements.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a load switch, comprising: a switch unit, a magnetic flux tripping unit, a current detection unit and a controller; wherein:

[0008] The switch unit comprises at least one switch control unit, one side of the switch control unit is connected to a corresponding interface of one pole on the input side of the load switch, and the other side of the switch control unit is connected to a corresponding interface of the same pole on the bus side of the load switch;

[0009] The current detection unit includes at least one current detection module, and the branch where the switch control unit is located is provided with a corresponding current detection module;

[0010] The output end of the current detection unit outputs a current detection signal to the controller;

[0011] The output end of the controller is connected to the input end of the magnetic flux tripping unit;

[0012] The on and off of the switch is controlled by the magnetic flux tripping unit.

[0013] Optionally, it also includes: a voltage detection unit;

[0014] The voltage detection unit includes at least one voltage detection module; each interface on the input side of the load switch is divided into at least one pair of positive and negative interfaces, and a corresponding voltage detection module is respectively arranged between each pair of positive and negative interfaces;

[0015] The output end of the voltage detection unit outputs a voltage detection signal to the controller.

[0016] Optionally, the switch unit further includes: at least one group of micro switches, and the micro switches are used to feed back the state of the switch control unit to the controller or the system controller.

[0017] Optionally, the controller includes: a processor, a memory, a flux release control circuit and at least one signal processing circuit; wherein,

[0018] The input end of the signal processing circuit receives the corresponding detection signal;

[0019] The output end of the signal processing circuit, the input end of the flux release control circuit and the memory are respectively connected to the processor;

[0020] The output end of the magnetic flux release control circuit is connected to the input end of the magnetic flux release unit.

[0021] Optionally, the controller further includes: a first isolation module;

[0022] One side of the first isolation module is communicatively connected to the system controller via the communication interface of the load switch;

[0023] The other side of the first isolation module is connected to the processor.

[0024] Optionally, when the switch unit further includes at least one micro switch, the controller further includes: a second isolation module;

[0025] The processor receives the state of the switch control component fed back by the micro switch through the second isolation module.

[0026] Optionally, the controller further includes: a display information interface;

[0027] The processor is connected to an external display unit via the display information interface.

[0028] Optionally, the controller further includes: a power module;

[0029] The output end of the power module supplies power to the signal processing circuit, the processor and the flux release control circuit respectively.

[0030] Optionally, the flux tripping unit comprises: an excitation tripping module and a linkage mechanism;

[0031] The input end of the excitation trip module serves as the input end of the flux trip unit;

[0032] The excitation tripping module controls the switch controlled device to open through the linkage mechanism.

[0033] Optionally, the excitation trip module includes: a lock, a trip rod, an iron core and a coil;

[0034] The coil is wound on the iron core, and two ends of the coil serve as input ends of the excitation tripping module;

[0035] When one end of the tripping rod is attracted by the iron core, the other end of the tripping rod pushes the lock to unlock, so that the switch is controlled to be opened.

[0036] Optionally, the linkage mechanism comprises: an upper connecting rod, a lower connecting rod, a main spring and a jump buckle;

[0037] One end of the main spring is connected to the handle, and the other end of the main spring is respectively connected to one end of the upper connecting rod and one end of the lower connecting rod;

[0038] The other end of the upper connecting rod is connected to the jump buckle;

[0039] The other end of the lower connecting rod is connected to the moving contact of the switch control component;

[0040] When the trip button is locked by the lock button, the moving contact and the static contact of the switch control unit are in a closed state; when the trip button is unlocked by the lock button, the moving contact and the static contact are in an open state.

[0041] Optionally, the controller and each unit are integrated or separately arranged.

[0042] The load switch provided by the present application has corresponding current detection modules in the branches where each switch control unit is located, and the detected current detection signal can be output to the controller; and the controller can control the on and off of each switch control unit through the flux trip unit, and then, when any current detection signal represents that the flow direction or magnitude of the corresponding path current is abnormal, the controller can control each switch control unit to disconnect through the flux trip unit. That is, the present application can actively identify system faults through current detection and implement protection in time without adding protection elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0044] Figure 1 A schematic diagram of the structure of a load switch provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the current flow direction and magnitude of each path in a load switch under normal conditions provided by an embodiment of the present application;

[0046] Figure 3 A schematic diagram of the current flow direction and magnitude of each path in the load switch under the reverse connection condition provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of the current flow direction and magnitude of each path in a load switch under multi-point grounding provided in an embodiment of the present application;

[0048] Figure 5 A schematic diagram of the current flow direction and magnitude of each path in a load switch under another multi-point grounding condition provided by an embodiment of the present application;

[0049] Figure 6 A schematic diagram of the transmission direction of signals of various devices in a load switch provided in an embodiment of the present application;

[0050] Figure 7 A schematic diagram of the structure of a controller in a load switch provided in an embodiment of the present application;

[0051] Figure 8 A schematic diagram of a flux trip unit module and a switch control unit in a load switch provided in an embodiment of the present application in a closed state;

[0052] Fig. 9 A schematic diagram of a flux trip unit module and a switch control unit in a load switch provided in an embodiment of the present application in an open state. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0054] In this application, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0055] The present application provides a load switch that can actively identify system faults, trip in time to perform protective actions, and does not require additional protective elements.

[0056] See also Figure 1 The load switch comprises: a switch unit 10, a magnetic flux tripping unit 20, a current detection unit 40 and a controller 30; wherein:

[0057] The switch unit 10 includes at least one switch control unit. Figure 1 In the figure, a 4-way switch control unit (as shown in K1 to K4) is used as an example. Moreover, for each switch control unit, one side is connected to the input side of the load switch corresponding to the first pole of the line interface, and the other side is connected to the same pole of the load switch corresponding to the line interface; for example, one side of the switch control unit K1 is connected to the first positive pole line interface of the input side of the load switch, and the other side is connected to the first positive pole line interface of the load switch on the bus side; the other switch control units K2 to K4 can be seen in Figure 1 , I will not go into details here.

[0058] The current detection unit 40 includes at least one current detection module (such as Figure 1 As shown in each A), a corresponding current detection module is provided in the branch where the switch control unit is located, and then each switch control unit can respectively collect the current flowing through itself through the current detection module in the branch where it is located. In practical applications, the current detection module can use a current sensor, but is not limited to this. Other devices that can collect the corresponding branch current are also within the protection scope of this application.

[0059] The output end of the current detection unit 40 outputs a current detection signal to the controller 30; that is, each current detection module outputs the current detection signal obtained by its own detection to the controller 30, so that the controller 30 can obtain the current information flowing through each switch controlled component, such as the magnitude and direction of the current.

[0060] The output end of the controller 30 is connected to the input end of the flux trip unit 20; the on and off of the switch controlled device is controlled by the flux trip unit 20; further, the controller 30 can control the action of the flux trip unit 20 through a corresponding control signal; and the action of the flux trip unit 20 can control the switch controlled device to be in an open state.

[0061] Below Figure 1 Taking the structure shown in the figure as an example, the working principle of the load switch is explained:

[0062] Figure 1 It is a demonstration of one of the wiring methods of the Wuhuiyi system, in which the positive pole PV1+ of the first photovoltaic string and the positive pole PV2+ of the second photovoltaic string are connected to the first switch control panel together; the positive pole PV3+ of the third photovoltaic string, the positive pole PV4+ of the fourth photovoltaic string and the positive pole PV5+ of the fifth photovoltaic string are connected to the second switch control panel together; the negative pole PV5- of the fifth photovoltaic string and the negative pole PV4- of the fourth photovoltaic string are connected to the third switch control panel together; the negative pole PV3- of the third photovoltaic string, the negative pole PV2- of the second photovoltaic string and the negative pole PV1- of the first photovoltaic string are connected to the fourth switch control panel together.

[0063] As shown in Figure 2, under normal circumstances, the current of each photovoltaic string is In, and the current after the positive and negative poles are merged is 5In respectively.

[0064] When the system is reverse connected, reverse the string (such as Figure 3 The current in the fifth photovoltaic string PV5) shown in the figure is the current summary 4In of the remaining photovoltaic strings. The currents of the switch control components connected to the reverse-connected string, that is, the second and third switch control components, have changed in direction and magnitude compared to normal conditions.

[0065] When there are multiple points in each photovoltaic string (such as Figure 4 PV4+ and PV5- as shown in, or Figure 5 When PV4+ and PV3-) shown in the figure are grounded, the instantaneous current of the two grounded photovoltaic strings increases to 4In, and the switches connected to them are controlled, that is, Figure 4 The second and third switches shown in the figure are controlled by the control unit, or Figure 5 The second and fourth switches shown in the figure are controlled, and their currents have changed in the opposite direction and magnitude compared to normal conditions.

[0066] Therefore, the control program design of the photovoltaic string line fault can be performed inside the controller 30 based on the flow direction and size change of each current in the multi-pole load switch. When the load switch adopts other wiring methods to realize five-in-one, or realizes other number of photovoltaic string confluence multi-pole load switches, it can control each switch controlled by the flux trip unit 20 to open when any current is detected to be abnormal.

[0067] The load switch provided in this embodiment has corresponding current detection modules in the branches where each switch control unit is located, and the detected current detection signal can be output to the controller 30; and the controller 30 can control the on and off of each switch control unit through the magnetic flux trip unit 20, and then, when any current detection signal represents that the flow direction or magnitude of the corresponding path current is abnormal, the controller 30 can control the disconnection of each switch control unit through the magnetic flux trip unit 20. That is, the present application can actively identify system faults through current detection and implement protection in time, and there is no need to add protection elements such as fuses, thereby avoiding increased costs.

[0068] This embodiment provides another load switch, which, based on the previous embodiment, also includes Figure 1 Shown in: voltage detection unit 50.

[0069] like Figure 1 As shown in the figure, the voltage detection unit 50 includes at least one voltage detection module (such as each V shown in the figure). Each input side interface of the load switch is divided into at least one pair of positive and negative interfaces, and a corresponding voltage detection module is respectively arranged between each pair of positive and negative interfaces; Figure 1 Taking the five-in-one system under the shown wiring method as an example, on the input side of the load switch, its first interface and the second interface are both two interfaces of its positive pole, and its third interface and the fourth interface are both two interfaces of its negative pole; its first interface and the fourth interface constitute a pair of positive and negative interfaces, and its second interface and the third interface constitute a pair of positive and negative interfaces, and corresponding voltage detection modules are respectively arranged between the two pairs of positive and negative interfaces.

[0070] The output end of the voltage detection unit 50 outputs a voltage detection signal to the controller 30; that is, each voltage detection module outputs the voltage detection signal detected by itself to the controller 30, so that the controller 30 can obtain the voltage information flowing through each pair of positive and negative interfaces, and assist the controller 30 in making protection judgments. In practical applications, the voltage detection module can be a voltage sensor, but is not limited to this, and other devices that can realize the voltage detection function are also within the protection scope of this application.

[0071] In addition, the switch unit 10 of the load switch may also include: at least one group of micro switches, each group of micro switches is connected to the flux trip unit 20 to feed back the state of each switch control unit to the controller 30 or the system controller. In practical applications, these switch control units can be equipped with multiple groups of micro switches, for example, a group of micro switches is set to feed back the state of these switch control units to the controller 30, another group of system micro switches is set to feed back the state of these switch control units to the controller, and another group of micro switches is set to feed back the state of these switch control units to the indicator light. The specific structure of the micro switch can be referred to the prior art, which will not be repeated here.

[0072] The load switch provided in this embodiment is a multi-pole load switch that can actively identify system faults and actively trip. It adds a current detection unit 40, a voltage detection unit 50, a controller 30 and a flux trip unit 20 on the basis of a traditional load switch. Figure 6 The current detection unit 40 is responsible for detecting the magnitude and direction of the current flowing through each switch control unit, and the voltage detection unit 50 can detect the voltage between the positive and negative poles on the input side of the load switch. Both detection data will be fed back to the controller 30; then, the controller 30 determines whether the system current and voltage are abnormal through a preset program. If a fault occurs, a trip signal is sent to the flux trip unit 20, and the flux trip unit 20 pushes the push rod of the switch control unit to perform the trip operation. At the same time, a micro switch is preset inside the load switch, which can feed back the current status of each switch control unit to the controller 30.

[0073] It should be noted that, in actual applications, the controller 30 and the above-mentioned units can be integrated or discretely arranged; that is, the main unit of the load switch (including the switch unit 10 and the flux trip unit 20), the current detection unit 40, the voltage detection unit 50 and the controller 30 can be integrated into a whole, or they can be discretely arranged in a modular form inside the load switch, and different control methods can be realized through later changes in installation.

[0074] On the basis of the above embodiment, this embodiment provides some specific examples for the configuration of the controller 30 in the load switch, such as:

[0075] See also Figure 7 The controller 30 includes: a processor 301, a memory 302, a flux release control circuit 303 and at least one signal processing circuit 304; wherein:

[0076] The input end of the signal processing circuit 304 receives the corresponding detection signal, such as the above-mentioned current detection signal or voltage detection signal; in actual applications, the signal processing circuit 304 may specifically include a rectifier circuit and a signal conditioning circuit, and their number and specific structure can refer to other controllers in the prior art. It can condition the detection signal output by the corresponding sensor to be suitable for the processor 301 to receive, which will not be elaborated here.

[0077] The output end of the signal processing circuit 304, the input end of the flux release control circuit 303 and the memory 302 are respectively connected to the processor 301; that is, the processor 301 can receive the output signal of the signal processing circuit 304, control the output signal of the flux release control circuit 303, and can also perform operations such as reading and writing information on the memory 302; the control program described in the above embodiment can be stored in the memory 302, so that the processor 301 can realize the detection information judgment and protection functions described in the above embodiment.

[0078] The output end of the flux release control circuit 303 is connected to the input end of the flux release unit 20; furthermore, the processor 301 can control the on and off of each switch controlled component through the flux release control circuit 303 and the flux release unit 20 in sequence.

[0079] Preferably, see Figure 7 The controller 30 may also include: a first isolation module 305; one side of the first isolation module 305 is connected to the system controller through the communication interface 306 of the load switch; the other side of the first isolation module 305 is connected to the processor 301. At this time, the controller 30 has a communication function and can communicate with the system controller to feedback the status and fault information of the switch control unit.

[0080] In addition, when the switch unit 10 of the load switch further includes at least one micro switch, the controller 30 may also include Figure 7 As shown in: the second isolation module 307; at this time, the processor 301 receives the state of the corresponding switch controlled component fed back by the micro switch through the second isolation module 307.

[0081] In practical applications, the first isolation module 305 and the second isolation module 307 can both be optoelectronic isolation modules, but are not limited thereto. Other devices that can achieve signal isolation between different devices are also within the protection scope of this application.

[0082] In order to facilitate the observation of the operation and maintenance personnel, the controller 30 may further include Figure 7As shown in: display information interface 308; at this time, the processor 301 is connected to the external display unit through the display information interface 308, so that the display unit can display the status and fault information of the switch control unit.

[0083] It should be noted that each circuit or module of the controller 30 in the load switch may need power supply to work. In this case, the corresponding power supply can be realized by means of an external power supply, or a Figure 7 As shown in: power module 310; the output end of the power module 310 supplies power to the signal processing circuit 304, the processor 301 and the flux release control circuit 303. In practical applications, the power module 310 can be powered by an external power supply, or by a current detection module or a voltage detection module, depending on the specific application environment, all of which are within the protection scope of this application.

[0084] In this embodiment, the micro switch can simultaneously feedback the status of the corresponding switch control unit to the system controller and the processor 301. The controller 30 detects the voltage and current of the main circuit through the voltage detection module and the current detection module, and feeds back to the processor 301 after rectification and signal conditioning inside the controller 30; at the same time, the power supply module 310 provides power to all circuits in the controller 30; when the processor 301 determines that the circuit is abnormal, the flux release control circuit 303 is turned on to make the flux release unit 20 perform the tripping operation. In addition, the processor 301 can also accept the tripping instruction issued by the system controller, quickly turn on the flux release control circuit 303, and also make the flux release unit 20 perform the tripping operation. Moreover, the processor 301 can also accept the query of the system controller through the communication interface 306, and feedback the fault information and the current status of each switch control unit.

[0085] Based on the above embodiment, this embodiment provides some specific examples of implementation methods of other units in the load switch, such as:

[0086] Its magnetic flux trip unit 20, such as Figure 8 and Fig. 9 As shown in the figure, it includes: an excitation tripping module 21 and a linkage mechanism 22; wherein, the input end of the excitation tripping module 21 serves as the input end of the flux tripping unit 20; the excitation tripping module 21 controls each switch controlled device to open the gate through the linkage mechanism 22.

[0087] The excitation trip module 21 includes Figure 8 and Fig. 9As shown in the figure: a lock 214, a trip rod 213, an iron core 212 and a coil 211; wherein the coil 211 is wound on the iron core 212, and both ends of the coil 211 serve as input ends of the excitation trip module 21; when one end of the trip rod 213 is attracted by the iron core 212, the other end thereof pushes the lock 214 to unlock, so that each switch is controlled to be opened.

[0088] In addition, the linkage mechanism 22 can be Figure 8 and Fig. 9 As shown in, it includes: an upper connecting rod 223, a lower connecting rod 224, a main spring 222 and a tripping buckle 221; wherein, one end of the main spring 222 is connected to the handle so that the handle can display the opening, closing or tripping state, and the other end of the main spring 222 is respectively connected to one end of the upper connecting rod 223 and one end of the lower connecting rod 224; the other end of the upper connecting rod 223 is connected to the tripping buckle 221; the other end of the lower connecting rod 224 is connected to the moving contact 101 of the switch control unit in the load switch; when the tripping buckle 221 is locked by the lock buckle 214, the moving contact 101 and the static contact 102 of the switch control unit are in the closing state (such as Figure 8 When the trip buckle 221 is unlocked by the lock buckle 214, the moving contact 101 and the static contact 102 are in the open state (as shown in Fig. 9 ).

[0089] See also Figure 8 In the normal closing state, the flux coil 211 is not energized, the iron core 212 is separated from the tripping rod 213, and the lock 214 locks the tripping buckle 221 to keep it in the closed state. Fig. 9 , the flux coil 211 is electrically attracted to one end of the tripping rod 213, and the other end of the tripping rod 213 is pushed out, pushing the lock 214 to unlock, so that the tripping buckle 221 drives the upper connecting rod 223, the lower connecting rod 224 and the moving contact 101 to achieve opening under the pulling force of the main spring 222; and when the tripping occurs, the main spring 222 drives the handle to the tripping position. In addition, when the handle is used to perform opening and closing operations, the handle can drive the main spring 222 to operate, so that each switch controlled device can achieve opening and closing.

[0090] In practical applications, when the number of switch control units is greater than 1, their respective moving contacts 101 are connected to the above-mentioned lower connecting rod 224, and are further controlled by the flux tripping unit 20 to achieve simultaneous disconnection of each switch control unit, thereby preventing the faulty circuit switch control unit from being unable to be disconnected individually under high current.

[0091] It should be noted that Figure 8 and Fig. 9 It is only an optional structural example for the flux trip unit 20 and the switch control unit, and is not the only implementation form of the two. Other structural forms in the prior art that can be controlled by the controller to achieve opening and closing operations are also within the protection scope of this application and will not be described one by one here.

[0092] The same and similar parts between the various embodiments in this specification can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0093] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present utility model.

[0094] With respect to the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other, so that professionals in the field can implement or use the present invention. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A load switch, characterized in that: include: A switch unit, a flux trip unit, a current detection unit and a controller; wherein, The switch unit comprises at least one switch control unit, one side of the switch control unit is connected to a corresponding circuit interface of one pole on the input side of the load switch, and the other side of the switch control unit is connected to a corresponding circuit interface of the same pole on the bus side of the load switch; The current detection unit includes at least one current detection module, and the branch where the switch control unit is located is provided with a corresponding current detection module; The output end of the current detection unit outputs a current detection signal to the controller; The output end of the controller is connected to the input end of the magnetic flux tripping unit; The on and off of the switch is controlled by the magnetic flux tripping unit.

2. The load switch according to claim 1, characterized in that: Also includes: Voltage detection unit; The voltage detection unit includes at least one voltage detection module; each interface on the input side of the load switch is divided into at least one pair of positive and negative interfaces, and a corresponding voltage detection module is respectively arranged between each pair of positive and negative interfaces; The output end of the voltage detection unit outputs a voltage detection signal to the controller.

3. The load switch according to claim 1, characterized in that: The switch unit further includes: at least one group of micro switches, and the micro switches are used to feed back the state of the switch control unit to the controller or the system controller.

4. The load switch according to any one of claims 1 to 3, characterized in that: The controller comprises: a processor, a memory, a flux release control circuit and at least one signal processing circuit; wherein, The input end of the signal processing circuit receives the corresponding detection signal; The output end of the signal processing circuit, the input end of the flux release control circuit and the memory are respectively connected to the processor; The output end of the magnetic flux release control circuit is connected to the input end of the magnetic flux release unit.

5. The load switch according to claim 4, characterized in that: The controller further includes: a first isolation module; One side of the first isolation module is communicatively connected to the system controller via the communication interface of the load switch; The other side of the first isolation module is connected to the processor.

6. The load switch according to claim 4, characterized in that: When the switch unit further includes at least one micro switch, the controller further includes: a second isolation module; The processor receives the state of the switch control component fed back by the micro switch through the second isolation module.

7. The load switch according to claim 4, characterized in that: The controller also includes: a display information interface; The processor is connected to an external display unit via the display information interface.

8. The load switch according to claim 4, characterized in that: The controller further includes: a power module; The output end of the power module supplies power to the signal processing circuit, the processor and the flux release control circuit respectively.

9. The load switch according to any one of claims 1 to 3, characterized in that: The magnetic flux tripping unit comprises: an excitation tripping module and a linkage mechanism; The input end of the excitation trip module serves as the input end of the flux trip unit; The excitation tripping module controls the switch controlled device to open through the linkage mechanism.

10. The load switch according to claim 9, characterized in that: The excitation tripping module comprises: a lock, a tripping rod, an iron core and a coil; The coil is wound on the iron core, and two ends of the coil serve as input ends of the excitation tripping module; When one end of the tripping rod is attracted by the iron core, the other end of the tripping rod pushes the lock to unlock, so that the switch is controlled to be opened.

11. The load switch according to claim 10, characterized in that: The linkage mechanism comprises: an upper connecting rod, a lower connecting rod, a main spring and a jump buckle; One end of the main spring is connected to the handle, and the other end of the main spring is respectively connected to one end of the upper connecting rod and one end of the lower connecting rod; The other end of the upper connecting rod is connected to the jump buckle; The other end of the lower connecting rod is connected to the moving contact of the switch control component; When the trip button is locked by the lock button, the moving contact and the static contact of the switch control unit are in a closed state; when the trip button is unlocked by the lock button, the moving contact and the static contact are in an open state.

12. The load switch according to any one of claims 1 to 3, characterized in that: The controller and each unit are integrated or separately arranged.

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