Solid-state high-power switch suitable for DC distribution looped network of more-electric aircraft

Abstract

The invention discloses a solid-state high-power switch suitable for a DC distribution looped network of a more-electric aircraft. The solid-state high-power switch comprises a main switch circuit, an auxiliary power supply circuit, an energy absorption circuit, a detection circuit and a single-chip microcomputer control circuit, the main switch circuit is used for supporting bidirectional flow of high-power current; the auxiliary power supply module comprises a switching power supply which is used for outputting the direct-current looped network voltage to direct-current power supply voltage required by each module, and the switching power supply comprises transformer isolation; the detection circuit comprises a current detection unit and a voltage detection unit and is used for detecting current and voltage signals of the circuit; the single-chip microcomputer control circuit is used for receiving measurement data of the detection circuit, carrying out initial processing on the measurement data and driving an IGBT to be switched on or switched off. According to the solid-state high-power switch, the problems that a traditional mechanical switch is low in response speed, prone to abrasion, complex in maintenance and the like are solved through the solid-state switch technology, and the reliability and the operation efficiency of a power distribution system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of power electronics, and in particular to a solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft. Background Art

[0002] With the development of aviation technology, modern electric aircraft are gradually replacing traditional aircraft to meet the energy needs of high efficiency, reliability and safety. Electric aircraft use multiple independent power systems to ensure the stability and redundancy of power supply during flight, which puts higher requirements on the aircraft's power distribution system, especially in terms of ring network management. Most of the existing aircraft power distribution ring network switches rely on static or mechanical switching devices. Although these ring network switching devices can work normally in some low-power applications, they generally have some technical bottlenecks when dealing with the complex requirements of high-power, multi-source power systems, which are mainly manifested in the following aspects:

[0003] 1. Slow response speed. Most existing ring network switches use mechanical contacts or static switches, which have relatively slow response speeds. During the flight of a more electric aircraft, the state of the power system changes frequently, and traditional ring network switches often have difficulty responding in a short period of time, which may cause delays in power distribution and affect the stability of the system.

[0004] 2. Insufficient stability. Existing ring network switches may face higher stability challenges in the operating environment of the power system of a multi-electric aircraft. The power system of an aircraft usually operates in harsh environments such as extreme temperatures such as -40°C. Due to the limitations of its structure and working principle, traditional ring network switches may not be stable enough under complex environmental conditions and are prone to failure.

[0005] 3. Existing protection and control technologies mostly rely on traditional mechanical protection devices or simple current monitoring systems, which cannot meet the high-precision control requirements of high-power power systems in more-electric aircraft applications. These traditional technologies may not be able to respond in time or provide sufficient protection under high-power working conditions when dealing with the protection needs of complex power systems, posing certain safety risks.

[0006] Therefore, how to provide an efficient and reliable bidirectional distribution ring network switch in the power system of more-electric aircraft has become a key technical challenge in the design of aviation power systems. Summary of the invention

[0007] The purpose of the present invention is to provide a solid-state high-power switch suitable for a DC power distribution ring network of a more-electric aircraft, aiming to solve the technical bottlenecks of existing ring network switches in terms of response speed, stability and bidirectional current flow control, and to achieve efficient, stable and reliable power switching and distribution in a complex more-electric aircraft power system.

[0008] To achieve the above object, the present invention provides a solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft, comprising a main switch circuit, an auxiliary power supply circuit, an energy absorption circuit, a detection circuit and a single-chip microcomputer control circuit;

[0009] The main switch circuit is used to support the bidirectional flow of high-power current;

[0010] The auxiliary power supply module includes a switching power supply for outputting the DC ring network voltage to the DC supply voltage required by each module, and the switching power supply includes a transformer for isolation;

[0011] The energy absorption circuit is used to reduce the current stress of the main switch branch through the fault current transfer branch and release energy through the energy absorption branch to quickly block the short-circuit current when the main circuit branch fails and shuts down;

[0012] The detection circuit includes a current detection unit and a voltage detection unit, which are used to detect the current and voltage signals of the circuit;

[0013] The single chip control circuit is used to receive the measurement data of the detection circuit and perform preliminary processing on the measurement data.

[0014] Preferably, the main switch circuit includes a DC power supply, a load, a first IGBT module and a second IGBT module, the first IGBT module and the second IGBT module are connected in parallel, the first IGBT module includes a first IGBT and a first diode, the first IGBT is connected in series with the first diode, the second IGBT module includes a second IGBT and a second diode, the second IGBT is connected in series with the second diode.

[0015] Preferably, the anode of the first diode is connected to the first DC terminal, the collector of the first IGBT is connected to the cathode of the first diode, the emitter of the first IGBT is connected to the second DC terminal, the emitter of the second IGBT is connected to the anode of the second diode, the collector of the second IGBT is connected to the second DC terminal, and the cathode of the second diode is connected to the first DC terminal.

[0016] Preferably, the first DC terminal is connected to the DC power supply, and the second DC terminal is connected to the load, or the second DC terminal is connected to the DC power supply, and the first DC terminal is connected to the load.

[0017] Preferably, the energy absorption circuit includes a capacitor, a resistor and a metal oxide varistor, the first DC end is connected to the capacitor, the capacitor is connected to the second DC end after being connected in series with the resistor, and the metal oxide varistor is connected in parallel with the capacitor and the resistor.

[0018] Preferably, the current detection unit includes two current transformers and a shunt, and the voltage detection unit includes two voltage transformers; the two current transformers are respectively connected to the first DC end and the second DC end, and are used to sense and detect the current magnitudes of the first DC end and the second DC end; the two voltage transformers are respectively connected in parallel at both ends of the first IGBT module and the second IGBT module, and are used to sense and detect the voltage magnitude.

[0019] Preferably, the single chip microcomputer control circuit includes an isolation circuit, an operational amplifier, a follower, a filtering module and an analog-to-digital conversion module.

[0020] Preferably, it also includes an isolation drive module, a communication module, a PLC and a human-computer interaction module:

[0021] The isolation driving circuit includes an isolation circuit 2 and a driving circuit, which is used to isolate the control signal of the driving circuit from the gates of the two IGBTs and provide sufficient current and voltage for the gates;

[0022] The communication module includes a CAN communication bus, which is used to isolate the data transmission between the drive circuit and the PLC, and the CAN communication bus is connected to the human-computer interaction module through the PLC;

[0023] The PLC is used to receive status information from the drive circuit and communicate with the human-computer interaction module through a TCP / IP interface, and send control commands to the drive circuit;

[0024] The human-computer interaction module is responsible for providing an intuitive operation interface for users.

[0025] Preferably, the second isolation circuit comprises an optical isolator and an optical coupler, and the optical coupler is internally provided with an LED and a photodiode.

[0026] Preferably, the driving circuit includes a microcontroller, the output pins of the microcontroller are connected to the gates of two IGBTs, the digital quantity obtained by the single-chip control circuit is sent to the microcontroller for processing, and the high and low level signals are output through the output pins to control the switching states of the two IGBTs.

[0027] Therefore, the present invention adopts the above-mentioned solid-state high-power switch suitable for the DC power distribution ring network of a multi-electric aircraft, which has the following beneficial effects:

[0028] (1) The ring network switch of the present invention is connected in series in the DC branch, and can be turned on or off according to different states of the DC system. It has bidirectional transmission and is used to achieve efficient and reliable distribution and switching of electric energy in the DC power distribution network.

[0029] (2) It has various electrical performance protections. When a short circuit occurs, the ring network switch can quickly cut off the loop and block the short circuit current. When the voltage or current is higher than the set rated value, the protection logic can also be triggered to shut down the IGBT. It has the characteristics of fast response and high reliability.

[0030] (3) Equipped with CAN bus communication, data can be transmitted bidirectionally through PLC and Mcgspro configuration software. The configuration software can display the ring network switch status in real time, and the ring network switch can also be opened or closed by operating the configuration software.

[0031] (4) This device is based on solid-state switching technology and supports bidirectional current flow by integrating IGBT power devices, real-time monitoring modules and efficient control systems. It also combines the intelligent control of PLC and MCU to achieve rapid response and dynamic protection.

[0032] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A circuit topology schematic diagram of a solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of unidirectional current flow in a solid-state high-power switch according to an embodiment of the present invention;

[0035] Figure 3 This is a flow chart of current and voltage simulation signal processing of a solid-state high-power switch according to an embodiment of the present invention;

[0036] Figure 4 is a flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] Example

[0040] like Figure 1-2 As shown, the present invention provides a solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft, including a main switch circuit, an auxiliary power supply circuit, an energy absorption circuit, a detection circuit, a single-chip microcomputer control circuit, an isolation drive module, a communication module, a PLC and a human-computer interaction module.

[0041] The main switch circuit can support the bidirectional flow of high-power current, including DC power supply, load, first IGBT module and second IGBT module. The first IGBT module includes a first IGBT (i.e. insulated gate bipolar transistor) and a first diode, the first IGBT is connected in series with the first diode, the second IGBT module includes a second IGBT and a second diode, the second IGBT is connected in series with the second diode, and the first IGBT is connected in parallel with the second IGBT. The rated current of the ring network is set to 1000A high current, and the IGBT can choose BYD Semiconductor's BG1000F12D34S4, which is an IGBT designed for high-power applications and includes an integrated temperature detection function for real-time monitoring of the internal temperature of the module.

[0042] Figure 1 In the embodiment, T1 is a first IGBT, T2 is a second IGBT, D1 is a first diode, and D2 is a second diode. The anode of D1 is connected to the first DC terminal, the collector of T1 is connected to the cathode of D1, and the emitter of T1 is connected to the second DC terminal. The emitter of T2 is connected to the anode of D2, the collector of T2 is connected to the second DC terminal, and the cathode of D2 is connected to the first DC terminal. The first DC terminal is connected to a DC power supply, and the second DC terminal is connected to a load, or the second DC terminal is connected to a DC power supply, and the first DC terminal is connected to a load.

[0043] The two parallel diodes are used to absorb reverse voltage and enhance protection capability. The diode can be MDK1000A-16 from Shanghai Shangzheng Company, which supports a maximum rectification current of 1000A and can meet the needs of high power. At the same time, a good heat dissipation interface is integrated at the bottom of the diode, and an external heat sink ensures thermal management. The diode has a high surge current bearing capacity and can cope with the impact of transient large currents.

[0044] The auxiliary power supply module, including the switching power supply, is responsible for providing different DC voltage levels (24V, 12V, 5V) to supply power to the isolation drive circuit, detection circuit and single-chip control circuit, etc., and converts the DC ring network 270V voltage through various types of switching power supplies to output the DC power supply voltage required by each module. The switching power supply includes transformer isolation, transfers energy through electromagnetic coupling, and also provides physical isolation. Each circuit is independent of each other and does not interfere with each other, which improves the anti-interference ability.

[0045] The energy absorption circuit is used to quickly absorb the energy generated when a fault occurs, reduce current stress, and provide protection for the safe operation of the DC system. The energy absorption circuit includes a capacitor C1, a resistor R1, and a metal oxide varistor MOV. The first DC terminal is connected to the capacitor C1, and the capacitor C1 is connected in series with the resistor R1 and then connected to the second DC terminal. The metal oxide varistor (MOV) is connected in parallel with the capacitor C1 and the resistor R1. The above devices form an energy absorption branch. When the main circuit branch fails and is shut down, the fault current transfer branch reduces the current stress of the main switch branch, and releases energy through the energy absorption branch to quickly block the short-circuit current and ensure the safe operation of the DC system.

[0046] The detection circuit includes a current detection unit and a voltage detection unit, and transformer detection can be selected, that is, the current detection unit includes two current transformers and a shunt, and the voltage detection unit includes two voltage transformers. The two current transformers are respectively connected to the first DC terminal and the second DC terminal to sense and detect the current magnitude of the first DC terminal and the second DC terminal; the two voltage transformers are respectively connected in parallel to the first IGBT module and the second IGBT module to sense and detect the voltage magnitude of the DC system.

[0047] During detection, the wire or line through which the load current flows needs to pass through the current transformer, and then the induced current in a certain proportion to the load current is output at the output end of the current transformer. The advantages of this are: ① It has electrical isolation, and the measurement is carried out through magnetic field induction, which realizes the complete electrical isolation of the primary circuit and the secondary circuit; ② The measurement range is wide and can detect a wide range of current and voltage; ③ The dynamic response is fast, the measurement signal delay is small, and the anti-interference ability is strong.

[0048] In this embodiment, the detection circuit can use a Hall voltage transformer and a Hall current transformer. The Hall voltage transformer can be selected from the WHV1000AVDA24S4 model, and the Hall current transformer can be selected from the WHK50BSDA24S4 model. The Hall voltage transformer can measure 0-1000V DC, which can meet the measurement range of the 270V high-voltage DC system of the multi-electric aircraft. The output signal is a 0-5V linear voltage, which is easy to connect to the MCU and facilitate digital processing; since the rated current is 1000A and the measurement range of the Hall current transformer is 50A, a 10A current shunt is used to divide it into small currents to meet the measurement requirements. The shunt current (10A) of the current shunt passes through the Hall current transformer, so that the Hall sensor only needs to measure 10A of current, which is completely within its range. The current detection unit is located in the main switch circuit, the shunt is set in the current detection unit, and is connected in series with the main switch circuit, and the Hall current transformer is sleeved on the wire after the shunt is shunted by the shunt.

[0049] The digital quantity obtained by the detection circuit after signal conversion can also be displayed on the touch screen of the human-computer interaction module through the communication module. If the detection current exceeds the set safety threshold, the ring network switch will activate the overcurrent protection and disconnect the circuit. At the same time, undercurrent protection is designed. If the current value is lower than the normal working current, it is judged as a system failure or load abnormality, which will also trigger the switch action. In addition to the current itself, the instantaneous rate of change of the current is also very important. If the rate of change of the current exceeds the set threshold, it means that a short circuit fault may have occurred. The ring network switch will trigger the short-circuit protection and immediately disconnect the circuit.

[0050] The single-chip microcomputer control circuit is used to receive the measurement data of the detection circuit and perform preliminary processing on the measurement data. The preliminary processing includes signal isolation, amplification or reduction, impedance matching and filtering. The single-chip microcomputer control circuit includes an isolation chip, an amplifier chip, a follower, a filter module and an analog-to-digital conversion module connected in sequence. The analog-to-digital conversion modules are connected to the current transformer and the voltage transformer, and the analog-to-digital conversion module uses an analog-to-digital converter. The analog-to-digital conversion module and the filter module are respectively used to perform analog-to-digital conversion and filtering on the two-way induced current and voltage to obtain two-way digital current and voltage, and then send the obtained digital quantity to the MCU. Figure 3 As shown, after the detection circuit collects the analog signals of current and voltage, it is isolated by the isolation chip to obtain the sampled voltage, which is amplified by a certain proportion by the amplifier chip, and then impedance matched by the follower. Finally, it is filtered by the filter module to filter out the AC component in the signal. The obtained signal can be sent to the analog input end of the analog-to-digital converter (A / D converter). The analog-to-digital converter can use TLC1549, which is a single-channel ADC suitable for simple analog signal acquisition. The interface is a serial communication interface, which is easy to connect with the MCU.

[0051] The isolation driving circuit includes an isolation circuit and a driving circuit, which are used to isolate the control signal of the MCU from the gates of the two IGBTs, and provide sufficient current and voltage for the gates to ensure that the IGBTs can switch quickly and reliably. The isolation circuit includes an optical isolator and an optical coupler. The present invention uses an optical isolator for optical coupling isolation, and the high and low signals of the MCU are transmitted to the driving circuit through the optical coupler. An LED and a photodiode are arranged inside the optical coupler, and electrical isolation can be achieved between the LED and the photodiode. When the MCU outputs a high level, the LED inside the optical coupler emits light, and the driving circuit receives the light signal and converts it into a corresponding voltage signal, thereby driving the IGBT.

[0052] The drive circuit includes a microcontroller (MCU). The output pin (GPIO) of the MCU is connected to the gates of the two IGBTs. The single-chip control circuit obtains the digital quantity and sends it to the MCU for processing. The high and low level signals are output through the GPIO pins, that is, voltage drive is used to control the switch state of the IGBT. In general, the MCU mainly implements the following functions: ① Core control: Receive voltage and current detection signals, and determine whether to turn on or off the IGBT through internal logic. ② Drive signal generation: Control the drive circuit to provide a switch signal to the IGBT. ③ Communication interface: Communicate with the PLC through the CAN communication bus to transmit equipment status, fault information, etc.

[0053] The communication module includes a CAN communication bus, which is used to realize data transmission between the MCU and the PLC to ensure the coordinated operation of the system. The CAN communication bus is connected to the human-computer interaction module through the PLC, and the three are bidirectional. The CAN communication bus uses the SJA1000 controller chip to realize communication with the CAN bus protocol, provide an interface with the CAN network, and transmit data between different devices. The SJA1000 is connected to the MCU through the data bus to send control commands or read received CAN data.

[0054] The PLC is used to receive status information from the MCU and communicate with the human-computer interaction module (MCGS Pro software) through the TCP / IP interface. In addition, it can also send control commands (such as switch operations) to the MCU.

[0055] The human-computer interaction module uses MCGS Pro software, which is responsible for providing users with an intuitive operating interface. The TCP / IP network communication protocol is used between the human-computer interaction module and the PLC to achieve efficient and stable remote command transmission. When the user issues a control instruction (such as switch status switching) on ​​the MCGSPro interface, the human-computer interaction module transmits the instruction to the PLC through the TCP / IP network. After receiving the instruction, the PLC quickly transmits the instruction to the MCU through the built-in logic processing module, and finally the MCU drives the bidirectional switch module to perform the specified operation (such as conduction, shutdown or direction switching). Through the combination of PLC and human-computer interaction module, users can intuitively operate and monitor the switch status in real time, which improves the intelligence level and operation convenience of the system.

[0056] Reference Figure 4 The working principle of this device is: detect the current and voltage signals in the circuit, analyze the signal information through the MCU and send a control signal to the IGBT gate driver to determine whether the control signal is a conduction signal. If it is, the ring network switch is turned on and the current passes through one of the parallel ICBT modules. If not, the IGBT module is disconnected, that is, the ring network switch is disconnected. The control signal is sent through signal information in the following situations: the voltage or current value is greater than the set rated value, and the overcurrent or overvoltage protection is started; the voltage or current value is less than the set minimum value, and the undercurrent or overvoltage protection is started; a sharp rise in current is detected, and a short circuit may occur, and the short circuit protection is started; choose to open or close according to the actual situation.

[0057] Therefore, the present invention adopts the above-mentioned solid-state high-power switch suitable for the DC power distribution ring network of multi-electric aircraft. The present invention supports deployment in a multi-node DC ring network, has strong anti-interference ability and high scalability, adapts to the needs of complex power networks, and can also achieve high-speed power switching to meet the needs of efficient and safe power distribution.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft, characterized in that: It includes a main switch circuit, an auxiliary power supply circuit, an energy absorption circuit, a detection circuit and a single chip microcomputer control circuit; The main switch circuit is used to support the bidirectional flow of high-power current; The auxiliary power supply module includes a switching power supply for outputting the DC ring network voltage to the DC supply voltage required by each module, and the switching power supply includes a transformer for isolation; The energy absorption circuit is used to reduce the current stress of the main switch branch through the fault current transfer branch and release energy through the energy absorption branch to quickly block the short-circuit current when the main circuit branch fails and shuts down; The detection circuit includes a current detection unit and a voltage detection unit, which are used to detect the current and voltage signals of the circuit; The single chip control circuit is used to receive the measurement data of the detection circuit, perform preliminary processing on the measurement data, and drive the IGBT to turn on or off.

2. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 1, characterized in that: The main switch circuit includes a DC power supply, a load, a first IGBT module and a second IGBT module, the first IGBT module and the second IGBT module are connected in parallel, the first IGBT module includes a first IGBT and a first diode, the first IGBT is connected in series with the first diode, the second IGBT module includes a second IGBT and a second diode, the second IGBT is connected in series with the second diode.

3. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 2, characterized in that: The anode of the first diode is connected to the first DC terminal, the collector of the first IGBT is connected to the cathode of the first diode, the emitter of the first IGBT is connected to the second DC terminal, the emitter of the second IGBT is connected to the anode of the second diode, the collector of the second IGBT is connected to the second DC terminal, and the cathode of the second diode is connected to the first DC terminal.

4. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 3, characterized in that: The first DC terminal is connected to the DC power supply, and the second DC terminal is connected to the load, or the second DC terminal is connected to the DC power supply, and the first DC terminal is connected to the load.

5. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 3, characterized in that: The energy absorption circuit includes a capacitor, a resistor and a metal oxide varistor, the first DC end is connected to the capacitor, the capacitor is connected to the second DC end after being connected in series with the resistor, and the metal oxide varistor is connected in parallel with the capacitor and the resistor.

6. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 3, characterized in that: The current detection unit includes two current transformers and a shunt, and the voltage detection unit includes two voltage transformers; the two current transformers are respectively connected to the first DC terminal and the second DC terminal, and are used to sense and detect the current magnitudes of the first DC terminal and the second DC terminal; The two voltage transformers are respectively connected in parallel at both ends of the first IGBT module and the second IGBT module, and are used to sense and detect voltage.

7. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 1, characterized in that: The single chip control circuit comprises an isolation circuit 1, an operational amplifier, a follower, a filtering module and an analog-to-digital conversion module.

8. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 2, characterized in that: It also includes isolation drive module, communication module, PLC and human-computer interaction module: The isolation driving circuit comprises an isolation circuit 2 and a driving circuit, which is used to isolate the control signal of the driving circuit from the gates of the first IGBT and the second IGBT, and provide sufficient current and voltage for the gates; The communication module includes a CAN communication bus, which is used to isolate the data transmission between the drive circuit and the PLC, and the CAN communication bus is connected to the human-computer interaction module through the PLC; The PLC is used to receive status information from the drive circuit and communicate with the human-computer interaction module through a TCP / IP interface, and send control commands to the drive circuit; The human-computer interaction module is responsible for providing an intuitive operation interface for users.

9. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 8, characterized in that: The second isolation circuit includes an optical isolator and an optical coupler, and an LED and a photodiode are arranged inside the optical coupler.

10. A solid-state high-power switch suitable for a DC power distribution ring network of a multi-electric aircraft according to claim 9, characterized in that: The driving circuit includes a microcontroller, the output pins of which are connected to the gates of two IGBTs. The single-chip control circuit obtains digital quantities and sends them to the microcontroller for processing, and outputs high and low level signals through the output pins to control the switching states of the two IGBTs.

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