Train braking method, device, storage medium and electronic equipment

Abstract

The present invention provides a train braking method, device, storage medium, and electronic device, relating to the field of train braking technology. The train includes an eddy current braking device, and the method includes: obtaining a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device; determining a numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force; and when the numerical relationship satisfies a preset relationship, adding eddy current braking so that the train brakes based on the braking method after adding eddy current braking. The technical solution provided by the present invention can effectively brake when the train is running at high speed and can reduce the loss of the windings during braking, thereby ensuring the safe operation of the train.

Description

Technical Field

[0001] The present invention relates to the technical field of train braking, and in particular to a train braking method, device, storage medium and electronic equipment. Background Art

[0002] When braking rail trains, hybrid air-electric braking is currently commonly used, combining electric and air braking. However, due to the limitations of the traction motor's electric braking power, electric braking generally cannot cover the highest level of normal braking. Normal braking also requires air braking, which results in watt loss. Using pure air braking during emergency braking results in significant watt loss, which imposes significant operating and maintenance costs on train operations. In addition, due to the limitations of brake adhesion, traditional adhesion braking methods (electric and air braking) can no longer meet the braking distance requirements of rail trains at high speeds (e.g., 400 kilometers per hour), resulting in longer braking distances and unsafe conditions for train operation. Summary of the Invention

[0003] In response to the above-mentioned problems in the prior art, the present invention proposes a train braking method, device, storage medium and electronic equipment, which can effectively brake the train when it is running at high speed and reduce the loss of the braking pad during braking, thereby ensuring the safe operation of the train.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] In a first aspect, an embodiment of the present invention provides a train braking method, wherein the train includes an eddy current braking device; the method includes:

[0006] Obtaining a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device;

[0007] determining a numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force;

[0008] When the numerical relationship satisfies a preset relationship, eddy current braking is added so that the train is braked based on the braking method after the eddy current braking is added.

[0009] Preferably, the traction system of the train includes a permanent magnet traction motor; the power supply of the eddy current braking device is provided by the permanent magnet traction motor.

[0010] Preferably, the traction system of the train further includes a traction converter, the traction converter includes an inverter; the eddy current braking device includes: an eddy current braking power supply device and an eddy current excitation coil; the permanent magnet traction motor, the inverter, the eddy current braking power supply device and the eddy current excitation coil are electrically connected in sequence; the permanent magnet traction motor supplies power to the eddy current braking device in the following manner:

[0011] The electric energy generated by the permanent magnet traction motor is converted into direct current by the inverter, and then converted into a pulse square wave by the eddy current brake power supply device and input into the eddy current excitation coil to power the eddy current excitation coil.

[0012] Preferably, when the numerical relationship satisfies a preset relationship, eddy current braking is added so that the train is braked based on the braking mode after the eddy current braking is added, including:

[0013] When the numerical relationship satisfies F Re <F To ≤F Re +F Ed When the value is increased to F To -F Re eddy current braking force, so that the train is braked based on a braking method based on the combination of electric braking and eddy current braking;

[0014] When the numerical relationship satisfies F To >F Re +F Ed When the value is increased to F Ed eddy current braking force, so that the train is braked based on a braking method coordinated by electric braking, eddy current braking and air braking;

[0015] Among them, F Re is the maximum electric braking force, F Ed is the maximum eddy current braking force, F To is the total braking force required.

[0016] Preferably, when the numerical relationship satisfies F To >F Re +F Ed When the train brakes, the value of the air brake applied is: F To -F Re -F Ed .

[0017] Furthermore, the method further comprises:

[0018] When the numerical relationship does not satisfy the preset relationship, the train is braked using a pure electric braking method.

[0019] Furthermore, the method further comprises:

[0020] When the train performs emergency braking, obtaining maximum air braking force;

[0021] Emergency braking is performed on the train based on the maximum air braking force and the maximum eddy current braking force.

[0022] Furthermore, the method further comprises:

[0023] When the eddy current braking device and / or the traction system of the train fails, performing a reset operation on the eddy current braking device and / or the traction system of the train;

[0024] After the reset operation, determining whether the fault is eliminated;

[0025] When the fault is not eliminated, the train is braked using a pure air brake.

[0026] In a second aspect, an embodiment of the present invention provides a train braking device, wherein the train includes an eddy current braking device; the device includes:

[0027] a first acquiring unit, configured to acquire a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device;

[0028] a determining unit, configured to determine a numerical relationship between the required total braking force, the maximum electric braking force, and the maximum eddy current braking force;

[0029] The first braking unit is used to add eddy current braking when the numerical relationship meets a preset relationship, so that the train is braked based on the braking method after adding eddy current braking.

[0030] In a third aspect, an embodiment of the present invention provides a storage medium having program code stored thereon. When the program code is executed by a processor, the train braking method as described in any one of the above embodiments is implemented.

[0031] In a fourth aspect, an embodiment of the present invention provides an electronic device, which includes a memory and a processor, wherein the memory stores program code that can be run on the processor, and when the program code is executed by the processor, a train braking method as described in any one of the above embodiments is implemented.

[0032] The embodiments of the present invention provide a train braking method, device, storage medium and electronic device. By obtaining the maximum electric braking force, the maximum eddy current braking force and the required total braking force, and determining the numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force, when the numerical relationship satisfies the preset relationship, eddy current braking is added so that the train brakes based on the braking method after adding eddy current braking, so that the train adds eddy current braking on the basis of the existing braking method. Since the method of adding eddy current braking can reduce the air braking force accordingly, the watt loss during braking can be reduced; the added eddy current braking cooperates with the existing electric braking and air braking, so that the train can effectively brake even when running at high speed. It can be seen that the technical solution provided by the embodiments of the present invention can effectively brake when the train is running at high speed, and can reduce the watt loss during braking, thereby ensuring the safety of the train operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The scope of the present invention can be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, which include:

[0034] Figure 1 The method flow of the embodiment of the present invention is Figure 1 ;

[0035] Figure 2 The method flow of the embodiment of the present invention is Figure 2 ;

[0036] Figure 3 This is a schematic diagram of a main control circuit according to an embodiment of the present invention;

[0037] Figure 4 Schematic diagram of energy flow during normal braking of a train in an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of energy flow during emergency braking of a train in an embodiment of the present invention;

[0039] Figure 6 This is another schematic diagram of a main control circuit according to an embodiment of the present invention;

[0040] Figure 7 This is another schematic diagram of a main control circuit according to an embodiment of the present invention;

[0041] Figure 8 This is another schematic diagram of a main control circuit according to an embodiment of the present invention;

[0042] Figure 9 This is another schematic diagram of a main control circuit according to an embodiment of the present invention;

[0043] Figure 10 2 is a structural diagram of a device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention clearer, the implementation method of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0046] Example 1

[0047] Since the existing adhesion braking method cannot meet the braking requirements when the train is running at high speed, other non-adhesion braking methods such as eddy current braking need to be considered to reduce the braking distance of the train.

[0048] According to an embodiment of the present invention, a train braking method is provided, wherein the train includes an eddy current braking device, such as Figure 1 As shown, the method described in the embodiment of the present invention includes:

[0049] Step S101, obtaining a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device;

[0050] In this embodiment, the train's traction system is a permanent magnet traction system, which includes a permanent magnet traction motor. The eddy current braking device is powered by the permanent magnet traction motor. This permanent magnet traction motor not only powers the eddy current braking device when the train's pantograph is powered, but also when the pantograph is de-energized, ensuring effective braking of the train.

[0051] Among them, the maximum electric braking force is calculated by the train's transmission control unit according to the electric braking force curve; the maximum eddy current braking force is calculated by the eddy current braking device; and the required total braking force is calculated by the train's braking control unit according to the train's braking curve.

[0052] like Figure 3As shown, the train traction system in this embodiment also includes a traction converter, which includes an inverter; the eddy current brake device includes an eddy current brake power supply device and an eddy current excitation coil; the permanent magnet traction motor, the inverter, the eddy current brake power supply device, and the eddy current excitation coil are electrically connected in sequence. In this embodiment, the permanent magnet traction motor supplies power to the eddy current brake device in the following manner: the electrical energy generated by the permanent magnet traction motor is converted into direct current by the inverter, then converted into a pulsed square wave by the eddy current brake power supply device and input into the eddy current excitation coil to power the eddy current excitation coil.

[0053] Step S102, determining a numerical relationship between the required total braking force, the maximum electric braking force, and the maximum eddy current braking force;

[0054] In this embodiment, the maximum electric braking force F obtained in step S101 is Re , the numerical value of the maximum eddy current braking force F Ed and the numerical value of the required total braking force F To To determine the numerical relationship between the three.

[0055] Step S103: When the numerical relationship satisfies a preset relationship, eddy current braking is added so that the train is braked based on the braking method after the eddy current braking is added.

[0056] In this embodiment, when the numerical relationship satisfies a preset relationship, eddy current braking is added so that the train brakes based on the braking method after the eddy current braking is added, including:

[0057] When the numerical relationship satisfies F Re <F To ≤F Re +F Ed When the value is increased to F To -F Re eddy current braking force, so that the train is braked based on a braking method based on the combination of electric braking and eddy current braking;

[0058] When the numerical relationship satisfies F To >F Re +F Ed When the value is increased to F Ed eddy current braking force, so that the train is braked based on a braking method coordinated by electric braking, eddy current braking and air braking;

[0059] Among them, F Re is the maximum electric braking force, F Ed is the maximum eddy current braking force, F To is the total braking force required.

[0060] Wherein, when the numerical relationship satisfies F To >F Re +F Ed When the train brakes, the value of the air brake applied is: F To -F Re -F Ed .

[0061] Eddy current braking utilizes an eddy current excitation coil mounted on the bogie. When the excitation coil is energized, the electromagnet and track move relative to each other, cutting through the magnetic lines of force. This generates a closed, vortex-shaped induced current (eddy current) within the track, distorting and deflecting the main magnetic field. The tangential force generated by this deflection of the magnetic lines of force is opposite to the direction of the train's travel, generating eddy current braking force to slow the train. Eddy current braking is a form of non-adhesion braking.

[0062] Rail trains utilize eddy current braking, combined with traditional electric and air braking, to minimize wattage losses during braking, reducing operating costs while also shortening braking distances and ensuring safe operation. However, if the pantograph and catenary of a rail train are without power, the eddy current brakes lack a power source and, without power, cannot provide electric braking force. The train's permanent magnet traction system, however, can generate electricity without excitation of the permanent magnet traction motor, providing power for the eddy current brake coils. This solves the problem of eddy current brakes being unable to provide power when the pantograph and catenary are without power.

[0063] In order to further perform effective braking, the method described in this embodiment further includes:

[0064] When the numerical relationship does not satisfy the preset relationship, the train is braked by using pure electric braking. That is, in this embodiment, when the required total braking force is not within the above numerical range, that is, when F To ≤F Re When the train is in a state of being ...

[0065] This embodiment determines the corresponding braking mode based on the numerical range of the total braking force required by the train. Specifically, when F To ≤F Re When F Re <F To ≤F Re +F Ed When the vehicle is in the state of being braked, the braking method of electric braking and eddy current braking is adopted, and the air brake is not applied. At this time, the magnitude of the eddy current braking force distributed is F To -F Re When FTo >F Re +F Ed When the vehicle is in the state of being braked, the braking method of electric braking, eddy current braking and air braking is adopted, and the magnitude of the eddy current braking force distributed at this time is F Ed The magnitude of the distributed air braking force is F To -F Re -F Ed .

[0066] In order to further perform effective braking, the method described in this embodiment also includes: obtaining a maximum air braking force when the train performs emergency braking; and performing emergency braking on the train based on the maximum air braking force and the maximum eddy current braking force.

[0067] Specifically, when the train performs emergency braking, the eddy current braking device is still powered by the permanent magnet traction motor. At this time, the eddy current braking device outputs the maximum eddy current braking force F Ed At the same time, the train braking system outputs the maximum air braking force F Air At this point, the train can output F Ed +F Air emergency braking force.

[0068] In order to further perform effective braking, the method described in this embodiment further includes:

[0069] When a fault occurs in the eddy current braking device and / or the traction system of the train, a reset operation is performed on the eddy current braking device and / or the traction system of the train; after the reset operation, it is determined whether the fault is eliminated; when the fault is not eliminated, the train is braked using a pure air brake; when the fault is eliminated, normal braking or emergency braking is performed in the manner described in steps S101 to S103.

[0070] An embodiment of the present invention provides a train braking method, which obtains the maximum electric braking force, the maximum eddy current braking force and the required total braking force, and determines the numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force. When the numerical relationship satisfies the preset relationship, eddy current braking is added so that the train brakes based on the braking method after adding eddy current braking, so that the train adds eddy current braking on the basis of the existing braking method. Since the method of adding eddy current braking can reduce the air braking force accordingly, the watt loss during braking can be reduced; the added eddy current braking is coordinated with the existing electric braking and air braking, so that the train can effectively brake even when running at high speed. It can be seen that the technical solution provided by the embodiment of the present invention can effectively brake when the train is running at high speed, and can reduce the watt loss during braking, thereby ensuring the safety of the train operation.

[0071] In addition, the present invention uses a permanent magnet traction motor to provide power for the eddy current braking device, so that the eddy current braking device can normally provide eddy current braking force even when the pantograph of the train is out of power, and no additional equipment is required for excitation operation, which greatly facilitates the eddy current braking of the train and further ensures the driving safety of the train.

[0072] Example 2

[0073] This embodiment takes the actual braking of a train while it is running as an example to further explain in detail the specific implementation process of train braking.

[0074] This embodiment first combines Figure 3 Explain the main circuit principle of the control object:

[0075] The control principle of the main circuit of this embodiment is as follows Figure 3 As shown in FIG, it mainly consists of a traction converter, a permanent magnet traction motor, an eddy current brake power supply device, an eddy current excitation coil, etc. Among them, the eddy current brake power supply device and the eddy current excitation coil are components of the eddy current brake device.

[0076] The permanent magnet traction motor acts as a generator to generate electrical energy during braking, providing electric braking force for the train and power for the eddy current braking device.

[0077] The traction converter performs energy conversion, converting the electrical energy generated by the permanent magnet traction motor and feeding it back to the grid. It also converts the electrical energy generated by the permanent magnet traction motor and provides power for the eddy current brake. The traction converter consists of a rectifier and an inverter. The rectifier converts AC power into DC power, providing energy for the intermediate circuit and stabilizing the intermediate DC voltage. It can also perform reverse conversion, converting DC power back into AC power and feeding it back to the grid. The inverter converts DC power in the intermediate DC circuit back into AC power, providing energy for the motor and driving its operation. It can also perform reverse conversion, rectifying AC power into DC power and feeding energy back to the motor.

[0078] The eddy current brake draws power from the traction converter's intermediate circuit, converting the converter's DC voltage into a pulse voltage with adjustable pulse width to power the eddy current excitation coil. By adjusting the duty cycle of the pulse voltage, the output current, and therefore the eddy current braking force, can be adjusted.

[0079] The eddy current excitation coil is installed on the bogie of the train and is powered by the eddy current brake power supply device. When the excitation coil is energized, the electromagnet formed moves relative to the track, and the track cuts the magnetic lines of force. A closed vortex-shaped induced current (eddy current) is generated in the track, causing the main magnetic field to be distorted and deflected. The tangential component force generated by the deflection of the magnetic lines of force is opposite to the direction of the train's movement, thereby generating eddy current braking force to slow down the train.

[0080] The braking system has the function of calculating and distributing the braking force, and includes a braking control unit. The braking control unit can communicate with the transmission control unit and the eddy current brake power supply control unit through network communication or hard-wired communication.

[0081] K1, K2, and K3 contactor switches are used to introduce power and isolate components.

[0082] like Figure 2 As shown, the train braking described in this embodiment is divided into three situations: normal braking of the train, emergency braking of the train when its pantograph is out of power, and braking of the train when a fault occurs. The following describes the train braking methods in the above three situations respectively:

[0083] (1) Normal braking

[0084] Under normal braking conditions, energy flows as follows Figure 4 As shown, the transmission control unit controls K2 and K1 to close, while the eddy current brake power supply control unit controls K3 to close. At this point, the permanent magnet traction motor acts as a generator, generating electrical energy and providing electric braking force. The energy generated by the permanent magnet traction motor is fed back to the traction converter through the inverter. This energy is then fed back to the grid through the rectifier and, after conversion by the eddy current brake power supply unit, outputs a pulsed square wave with a controllable duty cycle, which powers the eddy current excitation coil. When current is applied to the eddy current excitation coil, it provides eddy current braking force.

[0085] When the train speed is v, the transmission control unit feeds back the maximum electric braking capacity value F according to the electric braking force curve. Re Feedback the maximum eddy current braking force value F to the brake control unit and eddy current brake power control unit Ed The braking control unit calculates the required total braking force F according to the braking curve of the train. To If the brake control unit determines that F To ≤F Re , then no eddy current braking force and air control force are applied, and braking is performed by electric braking; if the brake control unit determines that F Re <F To ≤F Re +F Ed , then assign F to the eddy current brake power supply control device To -F Re The eddy current braking force is not applied, and the air braking force is not applied; if F To >F Re +F Ed When the brake system applies F To -F Re -F Ed The air braking force is distributed to the eddy current brake power control device.Ed Eddy current braking force.

[0086] The electric braking force and eddy current braking force generated by the train can minimize the loss of the winding when the train is parked and reduce the operating cost of the train.

[0087] (2) Emergency braking when the pantograph is out of power

[0088] In the emergency braking condition when the pantograph is out of power, the energy flows as follows Figure 5 As shown, the transmission control unit controls K2 to close and K1 to open, while the eddy current brake power supply control unit controls K3 to close. At this point, the permanent magnet traction motor acts as a generator, generating electricity to provide electric braking force (the electric braking force at this point is very small and negligible). The energy generated by the permanent magnet traction motor is fed back to the traction converter through the inverter. After conversion by the eddy current brake power supply unit, it outputs a pulsed square wave with a controllable duty cycle, which powers the eddy current excitation coil. When current is applied to the eddy current excitation coil, it provides eddy current braking force.

[0089] When the train speed is v, the transmission control unit maintains the intermediate voltage stable and continuously outputs power to the eddy current brake power supply unit. The eddy current brake power supply control unit outputs the maximum eddy current braking force F Ed At the same time, the braking system outputs the maximum air braking force F Air The train can output F Ed +F Air emergency braking force.

[0090] In this way, when the pantograph and catenary are without electricity, there is no need to excite the motor. The permanent magnet traction motor can generate electricity to provide eddy current braking force, which increases the emergency braking force of the train, reduces the emergency braking distance, and improves the safety of the train.

[0091] (3) Train braking when a fault occurs

[0092] If a fault in the traction system or eddy current brake device causes the K2 contactor to disconnect and the inverter to lock during braking, the train's regenerative braking is interrupted and the permanent magnet traction motor's energy cannot be fed back. At this point, the transmission control unit and eddy current brake device automatically reset. If the fault is eliminated after reset, the inverter is restarted and the K2 contactor is closed. The energy generated by the permanent magnet motor is fed back into the traction inverter, and braking is performed according to the control method in (1) or (2). If the fault cannot be eliminated after reset, the braking system will use air braking.

[0093] In this case, if a fault occurs in the train traction system or eddy current braking device, causing the K2 contactor to disconnect and the inverter to be locked, if the fault can be eliminated through automatic reset, there is no need to excite the motor. The permanent magnet traction motor can generate electrical energy to continue to provide electric braking force and eddy current braking force for the train. The response time is short, minimizing the impact of the fault on train braking.

[0094] It should be noted that, in another embodiment, Figure 3 When the circuit schematic diagram shown is applied to a subway train, the traction converter can be without a rectifier. The circuit schematic diagram after removing the rectifier is as follows Figure 6 shown.

[0095] In another embodiment, the Figure 3 The eddy current braking power supply device in the traction converter is integrated into the traction converter. The integrated circuit schematic is shown in the figure below. Figure 7 and Figure 8 shown.

[0096] In another embodiment, there may be multiple permanent magnet traction motors and corresponding multiple inverters. The circuit schematic diagram for increasing the number of permanent magnet traction motors and inverters is as follows: Figure 9 shown.

[0097] It should be noted that in order to make the diagram more concise and clear, the above Figure 6-Figure 9 The braking system is not shown.

[0098] The above method uses the permanent magnet traction motor of the wheel-rail train to generate electricity, which is then converted to power the eddy current braking device. On the one hand, it provides eddy current braking force for the train during normal braking, reducing the train's watt loss. On the other hand, when emergency braking is still required even when the train's pantograph and catenary are without power, the permanent magnet motor can generate electricity, which can power the eddy current braking device without external excitation, providing sufficient braking force for emergency braking in the absence of power to the train's pantograph and catenary, reducing the emergency braking distance and ensuring the safety of train operation. In addition, if a fault occurs in the train's traction system or eddy current braking device, preventing the train from regenerative braking, and if the fault can be eliminated through automatic reset, there is no need to excite the motor, and the permanent magnet traction motor can generate electricity to continue to provide electric braking force and eddy current braking force for the train. This has a short response time and minimizes the impact of the fault on the train's braking.

[0099] An embodiment of the present invention provides a train braking method, which obtains the maximum electric braking force, the maximum eddy current braking force and the required total braking force, and determines the numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force. When the numerical relationship satisfies the preset relationship, eddy current braking is added so that the train brakes based on the braking method after adding eddy current braking, so that the train adds eddy current braking on the basis of the existing braking method. Since the method of adding eddy current braking can reduce the air braking force accordingly, the watt loss during braking can be reduced; the added eddy current braking is coordinated with the existing electric braking and air braking, so that the train can effectively brake even when running at high speed. It can be seen that the technical solution provided by the embodiment of the present invention can effectively brake when the train is running at high speed, and can reduce the watt loss during braking, thereby ensuring the safety of the train operation.

[0100] In addition, the present invention uses a permanent magnet traction motor to provide power for the eddy current braking device, so that the eddy current braking device can normally provide eddy current braking force even when the pantograph of the train is out of power, and no additional equipment is required for excitation operation, which greatly facilitates the eddy current braking of the train and further ensures the driving safety of the train.

[0101] Example 3

[0102] Corresponding to the above method embodiment, the present invention also provides a train braking device, wherein the train includes an eddy current braking device, such as Figure 10 As shown, the device includes:

[0103] A first acquiring unit 201 is configured to acquire a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device;

[0104] a determination unit 202, configured to determine a numerical relationship between the required total braking force, the maximum electric braking force, and the maximum eddy current braking force;

[0105] The first braking unit 203 is configured to add eddy current braking when the numerical relationship satisfies a preset relationship, so that the train is braked based on the braking method after adding eddy current braking.

[0106] In this embodiment, the traction system of the train includes a permanent magnet traction motor; the power supply of the eddy current braking device is provided by the permanent magnet traction motor.

[0107] In this embodiment, the traction system of the train further includes a traction converter, which includes an inverter; the eddy current braking device includes an eddy current braking power supply device and an eddy current excitation coil; the permanent magnet traction motor, the inverter, the eddy current braking power supply device, and the eddy current excitation coil are electrically connected in sequence; and the permanent magnet traction motor supplies power to the eddy current braking device in the following manner:

[0108] The electric energy generated by the permanent magnet traction motor is converted into direct current by the inverter, and then converted into a pulse square wave by the eddy current brake power supply device and input into the eddy current excitation coil to power the eddy current excitation coil.

[0109] In this embodiment, the first braking unit 203 adopts the following method to add eddy current braking, so that the train brakes based on the braking method after adding eddy current braking:

[0110] When the numerical relationship satisfies F Re <F To ≤F Re +F Ed When the value is increased to F To -F Re eddy current braking force, so that the train is braked based on a braking method based on the combination of electric braking and eddy current braking;

[0111] When the numerical relationship satisfies F To >F Re +F Ed When the value is increased to F Ed eddy current braking force, so that the train is braked based on a braking method coordinated by electric braking, eddy current braking and air braking;

[0112] Among them, F Re is the maximum electric braking force, F Ed is the maximum eddy current braking force, F To is the total braking force required.

[0113] In this embodiment, when the numerical relationship satisfies F To >F Re +F Ed When the train brakes, the value of the air brake applied is: F To -F Re -F Ed .

[0114] Furthermore, the device described in this embodiment also includes:

[0115] The second braking unit is used to brake the train by adopting a pure electric braking method when the numerical relationship does not satisfy the preset relationship.

[0116] Furthermore, the device described in this embodiment also includes:

[0117] a second obtaining unit, configured to obtain a maximum air braking force when the train performs emergency braking;

[0118] A third braking unit is configured to perform emergency braking on the train based on the maximum air braking force and the maximum eddy current braking force.

[0119] Furthermore, the device described in this embodiment also includes:

[0120] a reset unit, configured to reset the eddy current brake device and / or the traction system of the train when a failure occurs in the eddy current brake device and / or the traction system of the train;

[0121] a judging unit, configured to judge whether the fault is eliminated after the reset operation;

[0122] The fourth braking unit is used to brake the train by adopting a pure air braking method when the fault is not eliminated.

[0123] The working principle, work flow and other contents related to the specific implementation of the above-mentioned device can be found in the specific implementation of the train braking method provided by the present invention, and the same technical contents will not be described in detail here.

[0124] An embodiment of the present invention provides a train braking device, which obtains the maximum electric braking force, the maximum eddy current braking force and the required total braking force, and determines the numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force. When the numerical relationship satisfies the preset relationship, eddy current braking is added so that the train brakes based on the braking method after adding eddy current braking, so that the train adds eddy current braking on the basis of the existing braking method. Since the method of adding eddy current braking can reduce the air braking force accordingly, the watt loss during braking can be reduced; the added eddy current braking cooperates with the existing electric braking and air braking, so that the train can effectively brake even when running at high speed. It can be seen that the technical solution provided by the embodiment of the present invention can effectively brake when the train is running at high speed, and can reduce the watt loss during braking, thereby ensuring the safety of the train operation.

[0125] In addition, the present invention uses a permanent magnet traction motor to provide power for the eddy current braking device, so that the eddy current braking device can normally provide eddy current braking force even when the pantograph of the train is out of power, and no additional equipment is required for excitation operation, which greatly facilitates the eddy current braking of the train and further ensures the driving safety of the train.

[0126] Example 4

[0127] According to an embodiment of the present invention, a storage medium is further provided, on which a program code is stored. When the program code is executed by a processor, the train braking method as described in any one of the above embodiments is implemented.

[0128] Example 5

[0129] According to an embodiment of the present invention, an electronic device is also provided, which includes a memory and a processor, wherein the memory stores program code that can be run on the processor, and when the program code is executed by the processor, the train braking method as described in any one of the above embodiments is implemented.

[0130] The embodiments of the present invention provide a train braking method, device, storage medium and electronic device. By obtaining the maximum electric braking force, the maximum eddy current braking force and the required total braking force, and determining the numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force, when the numerical relationship satisfies the preset relationship, eddy current braking is added so that the train brakes based on the braking method after adding eddy current braking, so that the train adds eddy current braking on the basis of the existing braking method. Since the method of adding eddy current braking can reduce the air braking force accordingly, the watt loss during braking can be reduced; the added eddy current braking cooperates with the existing electric braking and air braking, so that the train can effectively brake even when running at high speed. It can be seen that the technical solution provided by the embodiments of the present invention can effectively brake when the train is running at high speed, and can reduce the watt loss during braking, thereby ensuring the safety of the train operation.

[0131] In addition, the present invention uses a permanent magnet traction motor to provide power for the eddy current braking device, so that the eddy current braking device can normally provide eddy current braking force even when the pantograph of the train is out of power, and no additional equipment is required for excitation operation, which greatly facilitates the eddy current braking of the train and further ensures the driving safety of the train.

[0132] The present invention has the following advantages:

[0133] 1) The present invention uses a permanent magnet traction motor to generate electricity for the eddy current braking device, providing eddy current braking force for the train, reducing the train's watt loss and lowering the train's operating costs. At the same time, when the train's pantograph is without power, eddy current braking force can still be provided for the rail train, providing sufficient braking force for the train's emergency braking, reducing the train's braking distance, and ensuring the safety of the rail train.

[0134] 2) The present invention uses a permanent magnet motor to generate electricity to power the eddy current brake device, eliminating the need for external excitation or additional excitation equipment. This results in a relatively simple circuit structure and control method. Furthermore, if a failure in the train's traction system or eddy current brake device prevents the train from performing regenerative braking, automatic reset can eliminate the need for motor excitation if the failure is resolved. The permanent magnet traction motor generates electricity to continue providing electric and eddy current braking forces for the train, resulting in a short response time and minimizing the impact of the failure on the train's braking.

[0135] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another system, or ignoring or not implementing certain features.

[0136] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the objectives of the embodiments of the present invention.

[0137] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0138] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling an electronic device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0139] Although the embodiments disclosed herein are as described above, the contents described herein are merely embodiments for facilitating understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art may make any modifications and variations in the form and details of the embodiments without departing from the spirit and scope of the present invention. However, the scope of protection of the present invention shall remain subject to the scope defined by the appended claims.

Claims

1. A train braking method, characterized in that: The train includes an eddy current braking device; the method includes: Obtaining a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device; determining a numerical relationship between the required total braking force and the maximum electric braking force and the maximum eddy current braking force; When the numerical relationship satisfies a preset relationship, eddy current braking is added so that the train is braked based on the braking mode after the eddy current braking is added; When the numerical relationship satisfies a preset relationship, eddy current braking is added so that the train is braked based on the braking mode after the eddy current braking is added, including: When the numerical relationship satisfies F Re <F To ≤F Re +F Ed When the value is increased to F To -F Re eddy current braking force, so that the train is braked based on a braking method based on the combination of electric braking and eddy current braking; When the numerical relationship satisfies F To >F Re +F Ed When the value is increased to F Ed The eddy current braking force of the train is used to brake based on the braking method of electric braking, eddy current braking and air braking; when the numerical relationship satisfies F To >F Re +F Ed When the train brakes, the value of the air brake applied is: F To -F Re -F Ed Among them, F Re is the maximum electric braking force, F Ed is the maximum eddy current braking force, F To is the total braking force required; The method further comprises: When the numerical relationship does not satisfy the preset relationship, the train is braked using a pure electric braking method; The method further comprises: When the train performs emergency braking, obtaining maximum air braking force; Emergency braking is performed on the train based on the maximum air braking force and the maximum eddy current braking force.

2. The train braking method according to claim 1, characterized in that: The traction system of the train includes a permanent magnet traction motor; the power supply of the eddy current braking device is provided by the permanent magnet traction motor.

3. The train braking method according to claim 2, characterized in that: The traction system of the train also includes a traction converter, which includes an inverter; the eddy current braking device includes an eddy current braking power supply device and an eddy current excitation coil; the permanent magnet traction motor, the inverter, the eddy current braking power supply device, and the eddy current excitation coil are electrically connected in sequence; the permanent magnet traction motor supplies power to the eddy current braking device in the following manner: The electric energy generated by the permanent magnet traction motor is converted into direct current by the inverter, and then converted into a pulse square wave by the eddy current brake power supply device and input into the eddy current excitation coil to power the eddy current excitation coil.

4. The train braking method according to claim 1, characterized in that: The method further comprises: When the eddy current braking device and / or the traction system of the train fails, performing a reset operation on the eddy current braking device and / or the traction system of the train; After the reset operation, determining whether the fault is eliminated; When the fault is not eliminated, the train is braked using a pure air brake.

5. A train braking device, characterized in that: The train includes an eddy current braking device; the device includes: a first acquiring unit, configured to acquire a maximum electric braking force, a maximum eddy current braking force, and a required total braking force; wherein the maximum eddy current braking force is provided by the eddy current braking device; a determining unit, configured to determine a numerical relationship between the required total braking force, the maximum electric braking force, and the maximum eddy current braking force; a first braking unit, configured to add eddy current braking when the numerical relationship satisfies a preset relationship, so that the train is braked based on a braking mode after adding eddy current braking; The first braking unit adopts the following method to increase eddy current braking, so that the train brakes based on the braking method after the eddy current braking is added: When the numerical relationship satisfies F Re <F To ≤F Re +F Ed When the value is increased to F To -F Re eddy current braking force, so that the train is braked based on a braking method based on the combination of electric braking and eddy current braking; When the numerical relationship satisfies F To >F Re +F Ed When the value is increased to F Ed The eddy current braking force of the train is used to brake based on the braking method of electric braking, eddy current braking and air braking; when the numerical relationship satisfies F To >F Re +F Ed When the train brakes, the value of the air brake applied is: F To -F Re -F Ed Among them, F Re is the maximum electric braking force, F Ed is the maximum eddy current braking force, F To is the total braking force required; The device further comprises: a second braking unit, configured to brake the train using a pure electric braking method when the numerical relationship does not satisfy the preset relationship; The device further comprises: a second obtaining unit, configured to obtain a maximum air braking force when the train performs emergency braking; A third braking unit is configured to perform emergency braking on the train based on the maximum air braking force and the maximum eddy current braking force.

6. A storage medium having program code stored thereon, characterized in that: When the program code is executed by a processor, the train braking method according to any one of claims 1 to 4 is implemented.

7. An electronic device, characterized in that: The electronic device includes a memory and a processor. The memory stores program codes that can be run on the processor. When the program codes are executed by the processor, the train braking method according to any one of claims 1 to 4 is implemented.

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