Solid state circuit breaker

Abstract

The utility model relates to a kind of solid-state circuit breaker, it is characterized by, including: first functional unit, including at least one mechanical switch element, the input end of the mechanical switch element is connected to main circuit;Second functional unit, including at least one group of semiconductor switch element, the input end of the at least one group of semiconductor switch element is electrically connected with the output end of the at least one mechanical switch element, the output end of the at least one group of semiconductor switch element is connected to the input end of downstream device;Control unit is respectively with first functional unit and second functional unit communication connection, is configured to control at least one mechanical switch element and the on-off of at least one group of semiconductor switch element;And connecting unit, be configured to detachably connect first functional unit with second functional unit. According to the utility model embodiment, only main application function module can be replaced without replacing semiconductor device, which avoids whole machine replacement, reduces maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of power products, and more specifically, to a solid-state circuit breaker. Background Technology

[0002] The power semiconductor devices in solid-state circuit breakers are expensive, and the maintenance costs of replacing the entire unit are also high. Furthermore, customers currently have diverse needs for human-machine interfaces (HMIs) and communication, and expect customization. Utility Model Content

[0003] This utility model provides a solid-state circuit breaker, comprising: a first functional unit, the first functional unit including at least one mechanical switching element, the input terminal of the mechanical switching element being connected to a main circuit; a second functional unit, the second functional unit including at least one set of semiconductor switching elements, the input terminal of the at least one set of semiconductor switching elements being electrically connected to the output terminal of the at least one mechanical switching element, and the output terminal of the at least one set of semiconductor switching elements being connected to the input terminal of a downstream device; a control unit, the control unit being communicatively connected to the first functional unit and the second functional unit respectively, and configured to control the on / off switching of the at least one mechanical switching element and the at least one set of semiconductor switching elements; and a connection unit, configured to detachably connect the first functional unit and the second functional unit.

[0004] In one example, the at least one mechanical switching element includes a main mechanical switching element and at least one standby mechanical switching element connected in parallel.

[0005] In one example, each group of semiconductor switching elements comprises at least three semiconductor switching elements connected in parallel, and every two groups of semiconductor switching elements are connected in series.

[0006] In one example, the first functional unit includes a first housing, the second functional unit includes a second housing, and the connecting unit includes a first connecting component and a second connecting component, the first connecting component being disposed on the first housing, the second connecting component being disposed on the second housing, and the first connecting component and the second connecting component being detachably connected.

[0007] In one example, the control unit is housed within the second housing.

[0008] In one example, the first connection component is one of the copper busbar and the terminal clamp, and the second connection component is the other of the copper busbar and the terminal clamp, and the connection unit is configured to transmit the main circuit power.

[0009] In one example, the connection unit includes a hardware connector, and the first connection component is one of the hardware socket and the hardware plug of the hardware connector, and the second connection component is the other of the hardware socket and the hardware plug, and the connection unit is also configured to communicatively connect the first functional unit and the second functional unit for bidirectional communication between the first functional unit and the second functional unit.

[0010] In one example, the first housing and the second housing are secured by at least one screw.

[0011] In one example, the solid-state circuit breaker further includes a third functional unit comprising a data processing module and an interaction module, wherein the data processing module is electrically connected to the interaction module to perform one-way and / or two-way data transmission with the interaction module, and the data processing module is electrically connected to the control unit via a hardware connector to receive data from the control unit and / or send data to the control unit.

[0012] In one example, the interaction module includes at least one of a communication component and a human-machine interface.

[0013] In one example, at least a portion of the third functional unit is disposed on the first housing.

[0014] In one example, at least a portion of the third functional unit is housed within the first housing.

[0015] In one example, the solid-state circuit breaker also includes a power supply unit disposed on the first housing, connected to the main circuit power supply, and configured to provide power to the drive circuit, data processing module, and control circuit of at least one mechanical switching element.

[0016] In one example, the main mechanical switching element is configured to control the connection between the front-end power supply and at least one set of semiconductor switching elements, and the main circuit power supply is provided to the second functional unit via the main mechanical switching element and the connection unit.

[0017] In one example, the first housing is connected to the second housing along a first direction, and the second housing is fixed to a DIN rail along the first direction.

[0018] In one example, a downstream circuit breaker is connected to the second housing along the first direction.

[0019] Therefore, according to the embodiments of this utility model, only the main application function module needs to be replaced without replacing the semiconductor devices, which avoids the need to replace the entire machine and reduces maintenance costs. Attached Figure Description

[0020] The above and other aspects, features, and advantages of specific embodiments of the present invention will become clearer from the following description taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 This is a schematic block diagram illustrating a solid-state circuit breaker according to an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a solid-state circuit breaker according to an embodiment of the present invention is shown;

[0023] Figure 3 This diagram illustrates a case where a first functional unit and a second functional unit are connected via a connecting unit according to an embodiment of the present invention.

[0024] Figure 4 A schematic structural diagram of a solid-state circuit breaker according to another embodiment of the present invention is shown;

[0025] Figure 5 A schematic structural diagram of a solid-state circuit breaker according to another embodiment of the present invention is shown;

[0026] Figure 6 A schematic diagram of a solid-state circuit breaker in a connected state according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic block diagram of a solid-state circuit breaker according to another embodiment of the present invention is shown; and

[0028] Figure 8 A view showing a schematic layout of a solid-state circuit breaker according to an embodiment of the present invention. Detailed Implementation

[0029] Before proceeding with the detailed description below, it may be advantageous to define certain words and phrases used throughout this invention. The terms “comprising” and “including” and their derivatives mean, but are not limited to, any of the following. The term “controller” or “control unit” means any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware, or a combination of hardware and software and / or firmware. For example, a controller may include, for instance, an application-specific integrated circuit (ASIC), a general-purpose or special-purpose central processing unit (CPU), a digital signal processor (DSP), and programmable logic devices such as a field-programmable gate array (FPGA). A controller may be manufactured as a single printed circuit board (PCB) or distributed across several interconnected PCBs. A controller may include other processing circuitry; for example, a controller may include two processing circuits such as an FPGA and a CPU interconnected on a PCB. The functionality associated with any particular controller may be centralized or distributed, either local or remote. The phrase “at least one,” when used with a list of items, means that different combinations of one or more of the listed items may be used, and perhaps only one item from the list is required. For example, "at least one of A, B, and C" includes any one of the following combinations: A, B, C, A and B, A and C, B and C, A and B and C. Furthermore, in the description of this utility model, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance or order. In embodiments of this disclosure, unless otherwise expressly stated, "connection" does not necessarily mean "direct connection" or "direct contact," but only requires electrical connection.

[0030] Definitions of other specific words and phrases are provided throughout this invention. Those skilled in the art will understand that, in many, if not most, cases, such definitions apply to the prior and future use of the words and phrases thus defined.

[0031] The various embodiments of the present invention described below with reference to the accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of the present invention in any way. Those skilled in the art will understand that the principles of the present invention can be implemented in any suitably arranged system or device. In some cases, the actions described in the present invention can be performed in different orders and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific order or sequential sequence shown to achieve the desired result. In certain embodiments, multitasking and parallel processing may be advantageous.

[0032] The text and accompanying drawings are provided by way of example only to aid in understanding the present invention. They should not be construed as limiting the scope of the appended claims in any way. Although certain embodiments and examples have been provided, it will be clear to those skilled in the art, based on the content of the present invention, that changes can be made to the illustrated embodiments and examples without departing from the scope of the present invention.

[0033] Figure 1 This is a schematic block diagram showing a solid-state circuit breaker 100 according to an embodiment of the present invention.

[0034] like Figure 1 As shown, the solid-state circuit breaker 100 according to the present invention may include a first functional unit 101, a second functional unit 102, a control unit 103, and a connection unit 104.

[0035] The first functional unit 101 may include at least one mechanical switching element, the input terminal of which is connected to the main circuit.

[0036] The second functional unit 102 may include at least one set of semiconductor switching elements, the input terminals of the at least one set of semiconductor switching elements being electrically connected to the output terminals of the at least one mechanical switching element, and the output terminals of the at least one set of semiconductor switching elements being connected to the input terminals of downstream devices.

[0037] The control unit 103 can be communicatively connected to the first functional unit 101 and the second functional unit 102 respectively, and is configured to control the on / off state of at least one mechanical switching element and at least one set of semiconductor switching elements.

[0038] The connection unit 104 can be configured to detachably connect the first functional unit 101 to the second functional unit 102.

[0039] Therefore, the solid-state circuit breaker according to the present invention separates and detachably / separately connects the first functional unit including mechanical switching elements and the second functional unit including semiconductor switching elements, so that only the first functional unit can be replaced when needed without replacing the semiconductor device, which avoids the replacement of the whole machine and reduces maintenance costs.

[0040] In one example, the control unit 103 can control the tripping of at least one mechanical switching element and the opening / closing of at least one set of semiconductor switching elements to perform the protection function of the solid-state circuit breaker.

[0041] In one example, at least one mechanical switching element may include a main mechanical switching element, and the main mechanical switching element may be connected to the main circuit power supply.

[0042] In one example, at least one mechanical switching element may include a main mechanical switching element and at least one backup mechanical switching element.

[0043] The switching element is connected in parallel with at least one spare mechanical switching element, and both can be connected to the main circuit power supply.

[0044] In one example, the main mechanical switching element can be configured to control the connection between the front-end power supply and at least one set of semiconductor switching elements, and the main circuit power supply is provided to the second functional unit 102 via the main mechanical switching element and the connection unit. At least one spare mechanical switching element can be used for the self-testing process of the solid-state circuit breaker.

[0045] In one example, during the self-test process of the solid-state circuit breaker, when a button (not shown) on the first functional unit 101 is pressed, the microprocessor unit (MCU) of the first functional unit 101 can receive a self-test command and notify the protection MCU of the second functional unit 102 (e.g., ) through a data transmission channel. Figure 8 The second functional unit 102 shown in the figure is a control unit. Then, the MCU of the second functional unit 102 causes the solid-state circuit breaker to trip and reset, and the main mechanical switching element to disconnect.

[0046] During the brief moment when the main mechanical switch element disconnects, the backup mechanical switch element can continue to supply power to the downstream power source. After the self-test is completed, the main mechanical switch element will close again to supply power to the downstream power source.

[0047] In one example, the MCU of the first functional unit 101 is included in the detection control circuit, such as Figure 8 As shown in the image.

[0048] In one example, the main mechanical switching element is connected to the input terminal of the main circuit and receives the main circuit power supply, and is configured to control the connection between the upstream power supply and the electronic switch of the solid-state circuit breaker.

[0049] In one example, the main mechanical switching element, together with the electronic switch of the solid-state circuit breaker, forms an isolating switch.

[0050] In one example, the main circuit power is supplied to the second functional unit via the main mechanical switching element.

[0051] In one example, each group of semiconductor switching elements comprises at least three semiconductor switching elements connected in parallel, and every two groups of semiconductor switching elements are connected in series. Each pair of semiconductor switching elements connected in series can be used for a single phase line. However, those skilled in the art will understand that the number of semiconductor switching elements is not limited to this; the specific number is related to the magnitude of the current passing through, and any suitable number of semiconductor switching elements can be used as needed.

[0052] In one example, the first functional unit 101 may include a first housing (not shown), and the second functional unit 102 may include a second housing (not shown), and the connection unit 104 may include a first connection component and a second connection component, the first connection component may be disposed on the first housing, the second connection component may be disposed on the second housing, and the first connection component and the second connection component are detachably connected.

[0053] In other words, the first housing and the second housing can be detachably connected by detachably connecting the first connecting component and the second connecting component, thereby detachably connecting the first functional unit 101 and the second functional unit 102 together.

[0054] In one example, the control unit 103 may be housed within the second housing. That is, the control unit 103 and the second functional unit 102 may be housed within the same housing, i.e., within the second housing.

[0055] Figure 2 A schematic structural diagram of a solid-state circuit breaker 200 according to an embodiment of the present invention is shown. Figure 2 A schematic structural diagram of the solid-state circuit breaker 200 in the unconnected state is shown.

[0056] like Figure 2 As shown, the solid-state circuit breaker 200 may include a first functional unit 101, a second functional unit 102, and a connection unit 204. For ease of description and illustration, in... Figure 2 The control unit is not shown, however, those skilled in the art will understand that the solid-state circuit breaker 200 also includes a control unit.

[0057] Figure 2 The first functional unit 101 and the second functional unit 102 in Figure 1 The first functional unit 101 and the second functional unit 102 shown in the figure have the same function and result, which will not be described again here.

[0058] Similarly, the connection unit 204 may include a first connection component and a second connection component. In one example, the first connection component may be one of a copper busbar (e.g., a stationary contact) and a terminal clamp, and the second connection component may be the other of a copper busbar and a terminal clamp.

[0059] In one example, connection unit 204 can be configured to transmit main circuit power. That is, the main circuit power is transmitted to the second functional unit via at least one mechanical switching element and connection unit 204.

[0060] In one example, the first connecting component may be a copper busbar, and the second connecting component may be a terminal clamp. In this case, the copper busbar is disposed on the first functional unit 101, and the terminal clamp is disposed on the second functional unit 102.

[0061] Figure 3 This diagram illustrates a case where a first functional unit and a second functional unit are connected via a connection unit 204, according to an embodiment of the present invention.

[0062] Figure 3 The left side shows a schematic diagram of the first functional unit 101 and the second functional unit 102 being detachably connected together by the connecting unit 204. The solid coil shows the first connecting component as a copper busbar and the second connecting component as a terminal clamp being connected together.

[0063] Figure 3 The right side shows an enlarged schematic diagram of the wiring clamp, which can be located on the second housing.

[0064] Figure 3 The connection unit 204 shown is a pluggable component and can carry a large current, such as 63A, for the transmission of main circuit current.

[0065] Therefore, according to the embodiments of the present invention, the first functional unit 101 and the second functional unit 102 can be quickly assembled and disassembled by means of copper busbar-terminal clamp, which can save installation time and facilitate production and transportation.

[0066] Figure 4 A schematic structural diagram of a solid-state circuit breaker 400 according to another embodiment of the present invention is shown. Figure 4 A schematic structural diagram of the solid-state circuit breaker 400 in the unconnected state is shown.

[0067] like Figure 4 As shown, the solid-state circuit breaker 400 may include a first functional unit 101, a second functional unit 102, and a connection unit 404. For ease of description and illustration, in... Figure 4The control unit is not shown, however, those skilled in the art will understand that the solid-state circuit breaker 400 also includes a control unit.

[0068] Figure 4 The first functional unit 101 and the second functional unit 102 in Figure 1 The first functional unit 101 and the second functional unit 102 shown in the figure have the same function and result, which will not be described again here.

[0069] Similarly, the connection unit 404 may include a first connection component and a second connection component. The connection unit 404 may be a hardware connector, and the first connection component may be one of a hardware socket and a hardware plug of the hardware connector, and the second connection component may be the other of a hardware socket and a hardware plug.

[0070] The connection unit 404 can also be configured to communicatively connect the first functional unit 101 and the second functional unit 102 for bidirectional communication between the first functional unit 101 and the second functional unit 102.

[0071] Connection unit 404 (hardware connector) can be configured to communicatively connect the first functional unit 101 and the second functional unit 102 for bidirectional communication, such as bidirectional electronic communication, between the first functional unit 101 and the second functional unit 102. For example, the first functional unit 101 and the second functional unit 102 can send and receive signals, data, and / or control commands to each other via the hardware connector. For example, the first functional unit 101 can receive data and / or commands from the control unit 103 via the hardware connector.

[0072] In one example, the hardware connector could be a pluggable connector.

[0073] In one example, the hardware connector can be any suitable type of connector.

[0074] In one example, the hardware connector can transmit and receive signals, data, control commands, power, etc., between the first functional unit 101 and the second functional unit 102 via Universal Asynchronous Receiver / Transmitter (UART), Universal Synchronous / Asynchronous Receiver / Transmitter (USART), Serial Peripheral Interface (SPI), USB, etc. However, this embodiment of the invention is not limited to this; the hardware connector can use any suitable method to implement communication between the first functional unit 101 and the second functional unit 102.

[0075] Figure 5 A schematic structural diagram of a solid-state circuit breaker 500 according to another embodiment of the present invention is shown. Figure 5A schematic structural diagram of a solid-state circuit breaker 500 in an unconnected state is shown.

[0076] like Figure 5 As shown, the solid-state circuit breaker 500 may include a first functional unit 501, a second functional unit 502, and one or more screw components. For ease of description and illustration, in... Figure 5 The control unit is not shown, however, those skilled in the art will understand that the solid-state circuit breaker 500 also includes a control unit.

[0077] Figure 5 The first functional unit 101 and the second functional unit 102 in Figure 1 The first functional unit 101 and the second functional unit 102 shown in the figure have the same function and result, which will not be described again here.

[0078] In one example, the first housing and the second housing are secured together by at least one screw. In other words, the first functional unit 101 and the second functional unit 102 can be detachably connected and secured by at least one screw. The screw can extend from the first functional unit 101 to the second functional unit 102.

[0079] Although Figure 5 The diagram shows four screws; however, those skilled in the art will understand that the solid-state circuit breaker according to the present invention can be configured with more or fewer screws as needed and in accordance with relevant requirements.

[0080] In one example, the screw may be positioned at a location corresponding to at least one corner of the first housing of the first functional unit 101 and / or the second housing of the second functional unit 102. In another example, the screw may also be positioned at a location corresponding to the edge of the first housing of the first functional unit 101 and / or the second housing of the second functional unit 102. However, the present invention is not limited to this, and the screw may be positioned at any suitable location to securely connect the first functional unit 101 and / or the second functional unit 102 together.

[0081] Therefore, according to the present utility model embodiment, the first functional unit 101 and the second functional unit 102 can be reliably connected together through the connecting unit 204, the connecting unit 404 and the screw, and can also be quickly assembled and disassembled, which saves installation time and facilitates production and transportation.

[0082] Figure 6 A schematic diagram of a solid-state circuit breaker in a connected state according to an embodiment of the present invention is shown.

[0083] Figure 6 The solid-state circuit breaker shown can be used as a reference. Figures 1 to 5The solid-state circuit breakers described are 100, 200, 300, 400, or 500.

[0084] like Figure 6 As shown, the first functional unit 101 / first housing can be connected to the second functional unit 102 / second housing along a first direction, such as the X direction (negative X direction), and the second functional unit 102 / second housing can be fixed to a DIN rail along the first direction. After connecting the first functional unit 101 to the second functional unit 102 and connecting the second functional unit 102 to the DIN rail, the solid-state circuit breaker can be installed in the distribution cabinet.

[0085] In one example, the first housing is above the second housing, and the DIN rail is below the second housing. In other words, the first housing can be connected above the second housing along a first direction, and the second housing can be connected above the DIN rail along the first direction.

[0086] In addition, in one example, a downstream circuit breaker can be connected to the second housing along the first direction.

[0087] In one example, the downstream circuit breaker can be connected to the second housing in the same manner as the connection between the first functional unit 101 / first housing and the second functional unit 102 / second housing. In other words, one or more downstream circuit breakers can be arranged side by side with the first housing on the second housing, that is, one or more downstream circuit breakers can be arranged on the left or right side of the first housing.

[0088] In one example, the first housing and one or more downstream circuit breakers can be arranged side by side on the second housing along a second direction, such as the Y direction.

[0089] Figure 7 A schematic block diagram of a solid-state circuit breaker 700 according to another embodiment of the present invention is shown.

[0090] like Figure 7 As shown, the solid-state circuit breaker 700 according to the present invention may include a first functional unit 701, a second functional unit 702, a third functional unit 705, a control unit 703, and a connection unit 704.

[0091] The first functional unit 701, the second functional unit 702, the control unit 703, and the connection unit 704 can be referenced above. Figures 1 to 5 The first functional unit 101, the second functional unit 102, the control unit 103, and the connection units 104, 204, and 404 described have the same function and structure.

[0092] The first functional unit 701 may include at least one mechanical switching element, the input terminal of which is connected to the main circuit.

[0093] The second functional unit 702 may include at least one set of semiconductor switching elements, the input terminals of the at least one set of semiconductor switching elements being electrically connected to the output terminals of the at least one mechanical switching element, and the output terminals of the at least one set of semiconductor switching elements being connected to the input terminals of a downstream device.

[0094] The control unit 703 can be communicatively connected to the first functional unit 701 and the second functional unit 702 respectively, and is configured to control the on / off state of at least one mechanical switching element and at least one set of semiconductor switching elements.

[0095] The connection unit 704 can be configured to detachably connect the first functional unit 701 to the second functional unit 702.

[0096] The third functional unit 705 may include a data processing module and an interaction module. The data processing module is electrically connected to the interaction module to perform one-way and / or bidirectional data transmission with the interaction module. The data processing module may also be electrically connected to the control unit via a connection unit (hardware connector) to receive data from and / or send data to the control unit. The data processing module can control the operation of user-related components, such as communication components and / or human-machine interface (HMI), USB, etc.

[0097] In one example, the interaction module may include at least one of a communication component and a human-machine interface (HMI).

[0098] For example, the communication component may include components for Controller Area Network (CAN), Ethernet, Near Field Communication (NFC), Universal Serial Bus (USB), Bluetooth, and Bluetooth Low Energy (BLE), but the present invention is not limited thereto, and the communication component may also include components for any other communication.

[0099] Human-machine interfaces may include displays, speakers, keypads, buttons, touchpads, indicator lights, etc., but the embodiments of this utility model are not limited to these. Human-machine interfaces may also include any other suitable input / output devices to achieve partially or fully direct visual human-machine interaction.

[0100] In one example, at least a portion of the third functional unit 705 may be disposed on the first housing. For instance, the interaction module of the third functional unit 705 may be disposed on the first housing.

[0101] In one example, at least a portion of the third functional unit 705 may be housed within the first housing. For instance, the data processing module in the third functional unit 705 may be housed within the first housing.

[0102] The interaction module in the third functional unit 705 may include user-customized components, which can be added or removed according to the user's needs to meet various user requirements.

[0103] Therefore, the solid-state circuit breaker according to the present invention can be adapted to different customer needs, realize component customization, and reduce development costs.

[0104] Since the third functional unit 705 is disposed on and / or inside the first housing, the third functional unit 705 can be detachably connected to the second functional unit 102 / second housing, which facilitates replacement and allows for component customization, thereby improving the user experience.

[0105] In one example, the main mechanical switching element is configured to control the connection between the front-end power supply and at least one set of semiconductor switching elements, and the main circuit power supply is provided to the second functional unit via the main mechanical switching element.

[0106] In one example, the first functional unit 101 and / or 701 may further include a temperature sampling circuit (not shown) configured to detect the temperature of the connected unit.

[0107] In one example, the temperature sampling circuits of 101 and / or 701 in the first functional unit periodically or according to commands from the data processing module detect the temperature of the connection unit (e.g., connection unit 204). When the detected temperature of the connection unit is higher than a preset threshold temperature, the data processing module can control the system to issue a notification via a human-machine interface to inform the user to check or replace the relevant module. For example, audible and / or visual alarms can be issued via indicator lights, speakers, displays, etc.

[0108] In one example, the first functional unit 101 and / or 701 may also include a crystal oscillator circuit to provide a real-time clock signal. For example, the first functional unit 101 and / or 701 may periodically detect the temperature of the connection unit based on the clock signal to ensure stable insertion.

[0109] In one example, the solid-state circuit breaker may also include a power supply unit (see below). Figure 8 (Described as such), is disposed on the first housing, connected to the main circuit power supply, and configured to provide power to the drive circuit, data processing module, and control circuit of at least one mechanical switching element.

[0110] Specifically, the power supply unit can be configured to provide power to the drive circuit of at least one mechanical switching element, and can also be configured to provide power to control units 103 and / or 703. Furthermore, the power supply unit can also be configured to supply power to various detection circuits in the second functional units 102 and / or 702, the data processing module of the first functional units 101 and / or 701, and the control circuit of the downstream circuit breaker. For example, the power supply unit can be an auxiliary power board that draws power from the main circuit power input, converts it to AC / DC and steps it down to supply power to the internal components of the solid-state circuit breaker, such as providing power to the first functional units 101 and / or 701, and can also provide power to components in the second functional units 102 and / or 702.

[0111] In one example, the second functional unit 102 and / or 702 may further include at least one of a temperature detection circuit (e.g., a temperature sampling circuit), a voltage detection circuit (e.g., a voltage sampling circuit), and a current detection circuit (e.g., a current sampling circuit). The temperature detection circuit, voltage detection circuit, and current detection circuit are used for the power-off protection function of the solid-state circuit breaker.

[0112] The control units 103 and / or 703 in the second housing can be configured to control the tripping of the mechanical switch and the opening / closing of the electronic switch of the solid-state circuit breaker to perform the protection function of the solid-state circuit breaker. For example, under conditions such as overcurrent or short circuit, the mechanical switch of the solid-state circuit breaker trips, and the electronic switch opens and disconnects.

[0113] In one example, the second functional unit 102 and / or 702 can also be configured to connect to a downstream circuit breaker.

[0114] Power semiconductor devices are arranged in the second functional unit 102 and / or 702, so that only the first functional unit can be replaced when needed without replacing the semiconductor devices, which avoids the need for complete machine replacement and reduces maintenance costs.

[0115] Figure 8 A view showing a schematic layout of a solid-state circuit breaker according to an embodiment of the present invention. For ease of description, in... Figure 8 Only components relevant to examples of this invention are shown; however, those skilled in the art will understand that solid-state circuit breakers may not include these components. Figure 8 The components shown in the diagram may include more or fewer other components.

[0116] also, Figure 8 The layout shown is merely illustrative, but the embodiments of the present invention are not limited thereto. Those skilled in the art can arrange fewer or more components on the first functional unit 101 and / or 701 and the second functional unit 102 and / or 702 as needed.

[0117] In one example, an interactive module including communication components and an HMI is arranged on the first functional unit 101 and / or 701, for example, various components customized for the user according to user needs. The user can replace the first functional unit 101 and / or 701 with different components as needed.

[0118] Although not shown in the figure, the first functional unit 101 and / or 701 may also include flash memory, random access memory (RAM), read-only memory (ROM), power converter, etc.

[0119] In one example, the hardware connector can transmit and receive signals, data, control commands, power, etc. between the first functional unit 101 and / or 701 and the second functional unit 102 and / or 702 via Universal Asynchronous Receiver / Transmitter (UART), Universal Synchronous / Asynchronous Receiver / Transmitter (USART), Serial Peripheral Interface (SPI), USB communication, etc.

[0120] The main circuit power supply from the main circuit is input to the first functional unit 101 and / or 701, and passes through the main mechanical switching element and connection unit 204 on the first functional unit 101 and / or 701. Figure 8 (Not shown) is supplied to the second functional unit 102 and / or 702, and is also supplied to the power supply unit on the first functional unit 101 and / or 701. The main circuit power supply is... Figure 8 It is indicated by a thick black arrow.

[0121] The temperature detection circuit arranged on the second functional unit 102 and / or 702 may be, for example, Figure 8 The temperature sampling circuit shown in the figure, and the voltage detection circuit arranged on the second functional unit 102 and / or 702, can be, for example, Figure 8 The voltage sampling circuit shown in the figure, and the current detection circuit arranged on the second functional unit 102 and / or 702, can be, for example, a voltage sampling circuit. Figure 8 The current sampling circuit is shown in the figure.

[0122] Furthermore, the second functional units 102 and / or 702 may also include backplane circuitry, a power supply system, etc. In one example, the power supply unit may provide power to the backplane circuitry and the power supply system of the second functional units 102 and / or 702.

[0123] In addition, the power supply unit can provide power to the drive circuit and data processing module of at least one mechanical switching element in the first functional unit 101 and / or 701.

[0124] exist Figure 8The document also shows a USB power input to the USB interface; however, this USB power input is only enabled during configuration or maintenance and is not permitted to be enabled when the main circuit is powered on.

[0125] Through a multi-input power switching circuit, power from the power supply unit and USB power input are selectively supplied to the backplane circuitry of the second functional unit 102 and / or 702 and the power supply system.

[0126] In addition, through the power converter, power from the power supply unit and USB power input are selectively supplied to the protection function control board of the second functional unit 102 and / or 702 via hardware connectors.

[0127] Although the present invention has been described with reference to exemplary embodiments, various changes and modifications may be suggested to those skilled in the art. The present invention is intended to cover such changes and modifications that fall within the scope of the appended claims.

[0128] Any description in this invention should not be construed as implying that any particular element, step, or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined only by the claims.

Claims

1. A solid-state circuit breaker, characterized in that, include: The first functional unit includes at least one mechanical switching element, the input terminal of which is connected to the main circuit. The second functional unit includes at least one set of semiconductor switching elements, the input terminal of the at least one set of semiconductor switching elements is electrically connected to the output terminal of the at least one mechanical switching element, and the output terminal of the at least one set of semiconductor switching elements is connected to the input terminal of a downstream device. The control unit is communicatively connected to the first functional unit and the second functional unit, and is configured to control the on / off state of at least one mechanical switching element and at least one set of semiconductor switching elements. as well as The connection unit is configured to detachably connect the first functional unit and the second functional unit.

2. The solid-state circuit breaker according to claim 1, characterized in that, The at least one mechanical switching element includes a main mechanical switching element and at least one standby mechanical switching element connected in parallel.

3. The solid-state circuit breaker according to claim 1, characterized in that, Each of the at least one set of semiconductor switching elements comprises at least three semiconductor switching elements connected in parallel, and every two sets of semiconductor switching elements are connected in series.

4. The solid-state circuit breaker according to claim 1, characterized in that, The first functional unit includes a first housing, and the second functional unit includes a second housing. The connection unit includes a first connection component and a second connection component. The first connection component is disposed on a first housing, and the second connection component is disposed on a second housing. The first connection component and the second connection component are detachably connected.

5. The solid-state circuit breaker according to claim 4, characterized in that, The control unit is housed within the second housing.

6. The solid-state circuit breaker according to claim 4, characterized in that, The first connecting component is one of the copper busbar and the terminal clamp, and the second connecting component is the other of the copper busbar and the terminal clamp. The connection unit is configured to transmit the main circuit power.

7. The solid-state circuit breaker according to claim 4, characterized in that, The connection unit includes a hardware connector, and the first connection component is one of the hardware socket and the hardware plug of the hardware connector, and the second connection component is the other of the hardware socket and the hardware plug. The connection unit is also configured to communicatively connect the first functional unit and the second functional unit for bidirectional communication between the first functional unit and the second functional unit.

8. The solid-state circuit breaker according to claim 4, characterized in that, The first housing and the second housing are secured by at least one screw.

9. The solid-state circuit breaker according to claim 1, characterized in that, Also includes: The third functional unit includes a data processing module and an interaction module, wherein the data processing module is electrically connected to the interaction module to perform one-way and / or two-way data transmission with the interaction module. The data processing module is electrically connected to the control unit via a hardware connector to receive data from and / or send data to the control unit.

10. The solid-state circuit breaker according to claim 9, characterized in that, The interaction module includes at least one of a communication component and a human-machine interface.

11. The solid-state circuit breaker according to claim 9, characterized in that, At least a portion of the third functional unit is disposed on the first housing.

12. The solid-state circuit breaker according to claim 9, characterized in that, At least a portion of the third functional unit is disposed within the first housing.

13. The solid-state circuit breaker of claim 9 further includes a power supply unit disposed on the first housing, connected to the main circuit power supply, and configured to provide power to the drive circuit, data processing module, and control circuit of at least one mechanical switching element.

14. The solid-state circuit breaker according to claim 6, characterized in that, The main mechanical switching element is configured to control the connection between the pre-amplifier power supply and at least one set of semiconductor switching elements, and The main circuit power is supplied to the second functional unit via the main mechanical switching element and the connection unit.

15. The solid-state circuit breaker according to claim 4, characterized in that, The first housing is connected to the second housing along the first direction, and the second housing is fixed to the DIN rail along the first direction.

16. The solid-state circuit breaker according to claim 15, characterized in that, A downstream circuit breaker is connected to the second housing along the first direction.

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