Train control bus driving and protecting circuit and electronic equipment

Abstract

The invention discloses a train control bus driving and protecting circuit and electronic equipment, and relates to the technical field of rail traffic control. The train control bus driving and protecting circuit comprises a first driving module, a second driving module and a protection module, the input end of the second driving module is electrically connected with the output end of the first driving module; the input end of the line compensation module is electrically connected with the output end of the second driving module, and the line compensation module is used for improving the response conduction rate of the first driving module; and the input end of the bus voltage drop path acceleration module is electrically connected with the output end of the line compensation module, and the output end of the bus voltage drop path acceleration module is grounded. The invention solves the problems that the steady-state current of the existing bus is only several milliamperes, the distributed capacitance of the cable is greatly influenced by factors such as temperature and humidity, wiring difference and the like, and the cable is capacitive; when a current control device is used for driving, the problems of slow response, no protection function and poor reliability during bus level rising and falling exist.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit control, and more particularly to a train control bus driving and protection circuit and electronic equipment. Background Art

[0002] With the advancement of electronic technology, MOSFETs have been widely used as switching devices, replacing electromagnetic relays, in rail transit vehicle control systems. The design of their drive circuits is crucial to the safety and reliability of vehicle operation. The control cable for a single vehicle is approximately 40 meters long, connected via vehicle jumper cables (connectors) to form the train control bus. The total length of the control bus for a six-car train is approximately 280 meters, and for an eight-car train, approximately 380 meters. Vibrating environments can cause connectors to loosen, water to enter, and cable insulation to wear.

[0003] The existing bus steady-state current is only a few milliamperes, and the distributed capacitance of the cable is greatly affected by factors such as temperature, humidity, and wiring differences, and has capacitive characteristics. When driven by the current control device, there are problems such as slow response when the bus level rises and falls, no protection function, and poor reliability. Summary of the Invention

[0004] Purpose of the invention: To provide a train control bus drive and protection circuit, device, equipment and storage medium to solve at least one of the problems existing in the above-mentioned prior art.

[0005] Technical solution: A train control bus drive and protection circuit, including:

[0006] a first driver module;

[0007] a second driving module, an input end of which is electrically connected to the output end of the first driving module;

[0008] a circuit compensation module, an input end of which is electrically connected to the output end of the second driving module, the circuit compensation module being configured to increase a response conduction rate of the first driving module; and

[0009] A bus voltage drop acceleration module, whose input end is electrically connected to the output end of the line compensation module and whose output end is grounded, is used to turn on when the first driving module or the second driving module is turned off, and quickly release the residual charge of the control bus to accelerate the voltage drop.

[0010] Preferably, the first driving module includes: a first main controller that receives a first network control signal, the output end of the first main controller is connected to the input end of a first signal isolation unit, the output end of the first signal isolation unit is connected to the input end of a first driving unit, and the output end of the first driving unit is connected to the gate of a first switching device.

[0011] Preferably, the drain of the first switching device is connected to the power input terminal, and the source of the first switching tube is connected to the input terminal of the first current collection unit.

[0012] Preferably, the first output end of the first current acquisition unit is connected to the input end of the first analog-to-digital converter, and the output end of the first analog-to-digital converter is connected to the input end of the first main controller;

[0013] The first main controller sends the received first network control signal to the first signal isolation unit for signal isolation and conversion, and the first driving unit controls the first driving module to turn on or off according to the processed first network control signal; and

[0014] The first current acquisition unit sends the acquired current to the first main controller, and the first main controller verifies the consistency between the driving result of the first switching device and the first network control signal according to the current value to achieve a self-diagnosis function.

[0015] Preferably, the second driving module includes: a second main controller receiving a second network control signal, the output end of the second main controller is connected to the input end of the second signal isolation unit, the output end of the second signal isolation unit is connected to the input end of the second driving unit, and the output end of the second driving unit is connected to the gate of the second switching device.

[0016] Preferably, the drain of the second switching device is connected to the second output end of the first current collection unit, and the source of the second switching device is connected to the input end of the second current collection unit.

[0017] Preferably, the first output end of the second current acquisition unit is connected to the input end of the second analog-to-digital converter, and the output end of the second analog-to-digital converter is connected to the input end of the second main controller;

[0018] The second main controller sends the received second network control signal to the second signal isolation unit for signal isolation and conversion, and the second drive unit controls the second drive module to turn on or off according to the processed second network control signal; and

[0019] The second current acquisition unit sends the acquired current to the second main controller, and the second main controller verifies the consistency between the driving result of the second switching device and the second network control signal according to the current value to achieve a self-diagnosis function.

[0020] Preferably, the line compensation module is composed of RL passive components; the line compensation module is connected to the second output end of the second current acquisition unit.

[0021] Preferably, the bus voltage drop acceleration module includes: a logic circuit receiving output signals of the first main controller and the second main controller, the output end of the logic circuit being connected to the input end of a third signal isolation unit, the output end of the third signal isolation unit being connected to the input end of a third driving unit, and the output end of the third driving unit being connected to the gate of a third switching device;

[0022] The drain of the third switch device is connected to the output end of the line compensation module, and the source of the third switch tube is connected to the bleeder resistor and the diode in sequence.

[0023] Preferably, the first switching device is an enhancement-mode N-MOSFET device, and the second switching device is a depletion-mode N-MOSFET device.

[0024] In order to achieve the above objective, according to another aspect of the present application, an electronic device is provided.

[0025] The electronic device according to the present application includes the train control bus drive and protection circuit and a load; the train control bus drive and protection circuit is connected to the load, and the train control bus drive and protection circuit is used to drive the load.

[0026] Beneficial effect: In the embodiment of the present application, a line compensation module and a bus voltage drop acceleration module are added, through a first driving module; a second driving module, whose input end is electrically connected to the output end of the first driving module; a line compensation module, whose input end is electrically connected to the output end of the second driving module, the line compensation module is used to improve the response conduction rate of the first driving module; and a bus voltage drop acceleration module, whose input end is electrically connected to the output end of the line compensation module and whose output end is grounded, the bus voltage drop acceleration module is used to turn on when the first driving module or the second driving module is turned off, and quickly turn on the bus voltage drop acceleration module. The residual charge of the control bus is quickly released to accelerate the voltage drop, thereby achieving the purpose of accelerating the conduction rate and rapid cutoff of the device, thereby improving the control bus voltage rise rate, reducing the turn-on delay, and at the same time suppressing the voltage oscillation caused by the rapid rise of the bus voltage, and reducing the delay effect of the control cable distributed capacitance on the controlled object, reducing the technical effect of reducing the turn-off delay, thereby solving the existing bus steady-state current of only a few milliamperes, the cable distributed capacitance is greatly affected by factors such as temperature and humidity, wiring differences, and presents capacitive characteristics; when using the current control device to drive, there are technical problems such as slow response when the bus level rises and falls, no protection function, and poor reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a structural diagram of the train control bus drive and protection circuit according to an embodiment of the present application.

[0028] The accompanying drawings are:

[0029] 10. First driving module;

[0030] 20. Second driving module;

[0031] 30. Line compensation module;

[0032] 40. Bus voltage drop acceleration module. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] like Figure 1As shown, the present application relates to a train control bus driving and protection circuit and electronic equipment. The train control bus driving and protection circuit comprises: a first driving module 10; which is used to independently control the on and off of the enhanced switching device Q1.

[0038] The second driver module 20 has an input end electrically connected to the output end of the first driver module 10; it can achieve a good electrical connection effect, thereby ensuring a good electrical signal transmission effect; at the same time, the second driver module 20 is used to independently control the on and off of the depletion-mode switching device Q2, and the enhancement-mode switching device Q1 and the depletion-mode switching device Q2 are connected in series at the bus output end.

[0039] The line compensation module 30 has an input terminal electrically connected to the output terminal of the second driving module 20. The line compensation module 30 is used to increase the response conduction rate of the first driving module 10 and to accelerate the driving voltage rise when the enhancement mode switching device Q1 is turned on.

[0040] The bus voltage drop acceleration module 40 has an input electrically connected to the output of the line compensation module 30 and an output connected to ground. The bus voltage drop acceleration module 40 is configured to turn on when the first driver module 10 or the second driver module 20 is off, rapidly releasing residual charge on the control bus to accelerate voltage drop. The drain of the enhancement-mode N-MOSFET is connected to the bus output node, and the source is connected to ground via a bleeder resistor R1 and a diode D1. The module is configured to turn on when the enhancement-mode switching device Q1 or the depletion-mode switching device Q2 is off, rapidly releasing residual charge on the cable to accelerate voltage drop.

[0041] From the above description, it can be seen that this application achieves the following technical effects:

[0042] In the embodiment of the present application, a line compensation module 30 and a bus voltage drop acceleration module 40 are added, through the first driver module 10; the second driver module 20, whose input end is electrically connected to the output end of the first driver module 10; the line compensation module 30, whose input end is electrically connected to the output end of the second driver module 20, the line compensation module 30 is used to improve the response conduction rate of the first driver module 10; and the bus voltage drop acceleration module 40, whose input end is electrically connected to the output end of the line compensation module 30 and whose output end is grounded, the bus voltage drop acceleration module 40 is used to increase the response conduction rate of the first driver module 10 or the second driver module 10. The active module 20 is turned on when it is turned off, and the residual charge of the control bus is quickly released to accelerate the voltage drop, thereby achieving the purpose of accelerating the conduction rate of the device and quickly cutting off, thereby improving the control bus voltage rise rate, reducing the turn-on delay, and at the same time suppressing the voltage oscillation caused by the rapid rise of the bus voltage, and reducing the delay effect of the distributed capacitance of the control cable on the controlled object, and reducing the technical effect of reducing the turn-off delay, thereby solving the problem that the existing bus steady-state current is only a few milliamperes, the distributed capacitance of the cable is greatly affected by factors such as temperature and humidity, and wiring differences, and has capacitive characteristics; when using the current control device to drive, there are technical problems such as slow response when the bus level rises and falls, no protection function, and poor reliability.

[0043] Furthermore, the first driver module 10 includes a first main controller that receives a first network control signal, an output of the first main controller connected to an input of a first signal isolation unit, an output of the first signal isolation unit connected to an input of a first driver unit, and an output of the first driver unit connected to a gate of a first switching device. It is understood that this can achieve good electrical signal transmission, thereby achieving good control of the first switching device.

[0044] Furthermore, the drain of the first switch device is connected to the power input terminal, and the source of the first switch tube is connected to the input terminal of the first current collection unit. It can be understood that good power supply and current collection effects can be achieved.

[0045] Furthermore, the first output end of the first current acquisition unit is connected to the input end of the first analog-to-digital converter, and the output end of the first analog-to-digital converter is connected to the input end of the first main controller;

[0046] The first main controller sends the received first network control signal to the first signal isolation unit for signal isolation and conversion, and the first driving unit controls the first driving module 10 to turn on or off according to the processed first network control signal; and

[0047] The first current acquisition unit sends the acquired current to the first main controller, which verifies the consistency between the driving result of the first switching device and the first network control signal based on the current value, thereby implementing a self-diagnosis function. It can be understood that good control and detection effects can be achieved, thereby ensuring good operating results.

[0048] It should be noted that the method for receiving the first network control signal includes but is not limited to: a first communication port; a first main controller is CPU1; a first signal isolation unit is op1, also an optocoupler; a first switching device is an enhancement mode N-MOSFET device Q1; and a first current acquisition unit IC1.

[0049] Specifically, the first driving module 10 is composed of a communication port 1 , a CPU 1 , an optocoupler 1 , a driving circuit 1 , an enhancement-mode N-MOSFET device Q 1 , a first analog-to-digital converter A / D 1 , and a current acquisition IC 1 .

[0050] Furthermore, the second driver module 20 includes a second main controller that receives a second network control signal, an output of the second main controller connected to an input of a second signal isolation unit, an output of the second signal isolation unit connected to an input of a second driver unit, and an output of the second driver unit connected to a gate of the second switching device. It will be appreciated that this can achieve good electrical signal transmission, thereby achieving good control of the second switching device.

[0051] Furthermore, the drain of the second switch device is connected to the second output terminal of the first current collection unit, and the source of the second switch device is connected to the input terminal of the second current collection unit. It can be understood that a good current collection effect can be achieved.

[0052] Furthermore, the first output end of the second current acquisition unit is connected to the input end of the second analog-to-digital converter, and the output end of the second analog-to-digital converter is connected to the input end of the second main controller;

[0053] The second main controller sends the received second network control signal to the second signal isolation unit for signal isolation and conversion, and the second driving unit controls the second driving module 20 to turn on or off according to the processed second network control signal; and

[0054] The second current acquisition unit transmits the acquired current to the second main controller, which verifies the consistency between the driving result of the second switching device and the second network control signal based on the current value, thereby implementing a self-diagnosis function. It can be understood that good control and detection effects can be achieved, thereby ensuring good operation.

[0055] It should be noted that the method for receiving the second network control signal includes but is not limited to: a second communication port; a second main controller is CPU2; a second signal isolation unit is op2, also an optocoupler; a second switching device is a depletion-type N-MOSFET device Q2; and a second current acquisition unit IC2.

[0056] Specifically, the second driving module 20 is composed of a communication port 2, a CPU 2, an optocoupler 2, a driving circuit 2, a depletion-type N-MOSFET device Q2, a second analog-to-digital converter A / D2 and a current acquisition IC2.

[0057] Furthermore, when the bus steady-state current is greater than a set threshold, the enhancement-mode N-MOSFET device Q1 and the depletion-mode N-MOSFET device Q2 are turned off, and a short-circuit message is sent;

[0058] When both the bus inrush current and steady-state current are greater than the set threshold, an insulation fault message is sent;

[0059] When the current is less than the normal value, a loose connector message is sent.

[0060] When the enhancement-mode N-MOSFET device Q1 or the depletion-mode N-MOSFET device Q2 is turned off, the enhancement-mode N-MOSFET device Q3 is turned on, and the control cable charge is released through the bleeder resistor R1, accelerating the control cable voltage drop; conversely, the enhancement-mode N-MOSFET device Q3 is turned off.

[0061] Furthermore, the line compensation module 30 is composed of RL passive components and is connected to the second output terminal of the second current acquisition unit. It is understood that by adding the line compensation module 30 to the driver, the VGS rise rate of the enhancement-mode N-MOSFET device is increased, accelerating the device's turn-on rate, thereby increasing the control bus voltage rise rate, reducing turn-on delay, and suppressing voltage oscillations caused by the rapid rise of the bus voltage.

[0062] Specifically, the line compensation module 30 is composed of RL passive components and does not affect the bus output steady-state current.

[0063] Furthermore, the bus voltage drop acceleration module 40 includes: a logic circuit receiving output signals of the first main controller and the second main controller, an output end of the logic circuit being connected to an input end of a third signal isolation unit, an output end of the third signal isolation unit being connected to an input end of a third driving unit, and an output end of the third driving unit being connected to a gate of a third switching device;

[0064] The drain of the third switching device is connected to the output terminal of the line compensation module 30, and the source of the third switching device is connected to the bleeder resistor R1 and the diode D1 in sequence. It can be understood that when the enhancement-mode switching device Q1 or the depletion-mode switching device Q2 is turned off, the control bus voltage drops rapidly, the optocoupler current flowing through the controlled component decreases rapidly, and the optocoupler is quickly turned off, thereby reducing the delay effect of the distributed capacitance of the control cable on the controlled object and shortening the shutdown delay.

[0065] Specifically, the bus voltage drop acceleration module is composed of a NAND gate logic circuit, an optocoupler 3, a drive circuit 3, an enhancement mode N-MOSFET device Q3, a bleeder resistor R1, and a diode D1.

[0066] Furthermore, the first switching device utilizes an enhancement-mode N-MOSFET device, and the second switching device utilizes a depletion-mode N-MOSFET device. It is understood that the driver modules utilize the enhancement-mode switching device Q1 and the depletion-mode switching device Q2, respectively, which provides improved safety and anti-interference performance. The serial output of the driver modules prevents the problem of a single device's DS pole breaking down and being unable to shut down the output via a gate signal, ensuring reliable bus shutdown.

[0067] The working principle of the present invention is as follows:

[0068] When the first driver module 10, the second driver module 20, the line compensation module 30 and the line voltage drop acceleration module are connected, the communication port of the driver receives the network control signal, the CPU sends the control signal to the optocoupler for signal isolation and conversion, and the driver receives the optocoupler signal to control the opening or closing of the enhancement-mode N-MOSFET device Q1 and the depletion-mode switching device Q2.

[0069] If the depletion-mode switch device Q2 receives V before the enhancement-mode N-MOSFET device Q1 GS(ON) The depletion-mode switching device Q2 conducts in nanoseconds. Thanks to the line compensation module, the drive voltage VGS of the enhancement-mode N-MOSFET device Q1 quickly climbs to the rated voltage. The turn-on time of the enhancement-mode N-MOSFET device Q1 is shortened from several seconds before compensation to several microseconds after compensation. The bus voltage quickly climbs to the rated voltage, and the total bus voltage rise time is approximately microseconds.

[0070] If the enhancement-mode N-MOSFET device Q1 receives V before the depletion-mode switch device Q2 GS(ON) Signal, since the depletion-mode switch device Q2 is not turned on, the conduction time of the enhancement-mode N-MOSFET device Q1 is not affected by the bus capacitance and is about several microseconds; the conduction speed of the depletion-mode switch device Q2 is in the nanosecond level, and the total time for the bus voltage to rise is about microseconds.

[0071] The enhancement-mode N-MOSFET device Q1 and the depletion-mode switch device Q2 do not have a strict turn-on sequence, and the control logic is simple. CPU1 and CPU2 receive the same control signal, but signal synchronization between the two is not required.

[0072] The line compensation module 30 is composed of RL passive components and does not affect the steady-state current of the bus.

[0073] The gate signals for turning on and off of the enhancement-mode N-MOSFET device Q1 and the depletion-mode switch device Q2 are different: the enhancement-mode N-MOSFET device Q1 is fully turned on, V GS(on) 15V, turn off V GS <V GS(th) ; Depletion mode switch device Q2, fully turned on V GS(on) 10V, turn off V GS(off) The enhancement-mode N-MOSFET device Q1 and the depletion-mode switch device Q2 are connected in series, providing good fail-safe guidance and reliable bus shutoff.

[0074] The vehicle cables adopt a π-type equivalent circuit, the connectors adopt an RC-type equivalent circuit, and the bus and load equivalent circuits are established according to the vehicle formation.

[0075] When the enhancement-mode N-MOSFET device Q1 is turned on and the depletion-mode switching device Q2 is turned on, the CPU outputs the current value through the current acquisition unit. When the monitored current value is consistent with the fault characteristic value of the equivalent circuit, the CPU reports a bus short circuit (steady-state current greater than the set threshold) to the vehicle TCMS, turns off the enhancement-mode N-MOSFET device Q1 and the depletion-mode switching device Q2; bus insulation fault (when both the inrush current and the steady-state current are greater than the set threshold); the connector is loose (the steady-state current is less than the normal value).

[0076] When the enhancement-mode N-MOSFET device Q1 or the depletion-mode switching device Q2 is turned off, the enhancement-mode N-MOSFET device Q3 is turned on, and the charge in the control cable is released to the vehicle body through the discharge resistor R1 and the diode D1, accelerating the voltage drop of the control cable and reducing the cut-off time of the optocoupler inside the control device from seconds to microseconds; conversely, the enhancement-mode N-MOSFET device Q3 is turned off.

[0077] The present application also relates to an electronic device, comprising the train control bus drive and protection circuit and a load; the train control bus drive and protection circuit is connected to the load, and the train control bus drive and protection circuit is used to drive the load.

[0078] The present invention also has the following beneficial effects:

[0079] 1. The control module monitors the load current in real time to achieve overcurrent protection, insulation monitoring, connector loose fault warning, etc.

[0080] 2. The control module collects and monitors the load current, completes signal acquisition, verifies the consistency between the drive command and the MOSFET gate signal, prevents false triggering caused by vehicle electromagnetic interference, and improves reliability.

[0081] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. Train control bus drive and protection circuit, characterized in that, include: A first driving module (10); a second driving module (20), the input end of which is electrically connected to the output end of the first driving module (10); a line compensation module (30), the input end of which is electrically connected to the output end of the second driving module (20), the line compensation module (30) being used to increase the response conduction rate of the first driving module (10); and A bus voltage drop acceleration module (40) has an input end electrically connected to the output end of the line compensation module (30) and an output end grounded. The bus voltage drop acceleration module (40) is used to be turned on when the first drive module (10) or the second drive module (20) is turned off, and to quickly release residual charge on the control bus to accelerate voltage drop.

2. The train control bus driving and protection circuit according to claim 1, characterized in that: The first driving module (10) comprises: a first main controller receiving a first network control signal, the output end of the first main controller being connected to the input end of a first signal isolation unit, the output end of the first signal isolation unit being connected to the input end of a first driving unit, and the output end of the first driving unit being connected to the gate of a first switching device.

3. The train control bus driving and protection circuit according to claim 2, characterized in that: The drain of the first switch device is connected to the power input terminal, and the source of the first switch tube is connected to the input terminal of the first current collection unit.

4. The train control bus driving and protection circuit according to claim 3, characterized in that: The first output end of the first current acquisition unit is connected to the input end of the first analog-to-digital converter, and the output end of the first analog-to-digital converter is connected to the input end of the first main controller; wherein the first main controller sends the received first network control signal to the first signal isolation unit for signal isolation and conversion, and the first drive unit controls the first drive module (10) to be turned on or off according to the processed first network control signal; and The first current acquisition unit sends the acquired current to the first main controller, and the first main controller verifies the consistency between the driving result of the first switching device and the first network control signal according to the current value to achieve a self-diagnosis function.

5. The train control bus driving and protection circuit according to claim 4, characterized in that: The second driving module (20) comprises: a second main controller receiving a second network control signal, the output end of the second main controller being connected to the input end of a second signal isolation unit, the output end of the second signal isolation unit being connected to the input end of a second driving unit, and the output end of the second driving unit being connected to the gate of a second switching device.

6. The train control bus driving and protection circuit according to claim 5, characterized in that: The drain of the second switch device is connected to the second output end of the first current collection unit, and the source of the second switch tube is connected to the input end of the second current collection unit.

7. The train control bus driving and protection circuit according to claim 6, characterized in that: The first output end of the second current acquisition unit is connected to the input end of the second analog-to-digital converter, and the output end of the second analog-to-digital converter is connected to the input end of the second main controller; wherein the second main controller sends the received second network control signal to the second signal isolation unit for signal isolation and conversion, and the second drive unit controls the second drive module (20) to be turned on or off according to the processed second network control signal; and The second current acquisition unit sends the acquired current to the second main controller, and the second main controller verifies the consistency between the driving result of the second switching device and the second network control signal according to the current value to achieve a self-diagnosis function.

8. The train control bus driving and protection circuit according to claim 7, characterized in that: The line compensation module (30) is composed of RL passive components; the line compensation module (30) is connected to the second output end of the second current acquisition unit.

9. The train control bus driving and protection circuit according to claim 8, characterized in that: The bus voltage drop acceleration module (40) comprises: a logic circuit receiving output signals of the first main controller and the second main controller, the output end of the logic circuit being connected to the input end of a third signal isolation unit, the output end of the third signal isolation unit being connected to the input end of a third drive unit, and the output end of the third drive unit being connected to the gate of a third switching device; The drain of the third switch device is connected to the output end of the line compensation module (30), and the source of the third switch tube is connected to the discharge resistor and the diode in sequence.

10. The train control bus driving and protection circuit according to claim 5, characterized in that: The first switch device is an enhancement-mode N-MOSFET device, and the second switch device is a depletion-mode N-MOSFET device.

11. An electronic device, characterized in that It comprises the train control bus drive and protection circuit and the load as described in any one of claims 1-10; the train control bus drive and protection circuit is connected to the load, and the train control bus drive and protection circuit is used to drive the load.

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