CN117601658A - Magnetic levitation train braking control method and system - Google Patents

Magnetic levitation train braking control method and system Download PDF

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Publication number
CN117601658A
CN117601658A CN202410031007.3A CN202410031007A CN117601658A CN 117601658 A CN117601658 A CN 117601658A CN 202410031007 A CN202410031007 A CN 202410031007A CN 117601658 A CN117601658 A CN 117601658A
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CN
China
Prior art keywords
braking
braking force
landing
electric
force
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CN202410031007.3A
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Chinese (zh)
Inventor
罗贤辉
罗华军
张文会
李林
张海丰
曹芬
郑田田
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CRRC Zhuzhou Locomotive Co Ltd
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CRRC Zhuzhou Locomotive Co Ltd
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Priority to CN202410031007.3A priority Critical patent/CN117601658A/en
Publication of CN117601658A publication Critical patent/CN117601658A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H9/00—Brakes characterised by or modified for their application to special railway systems or purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a magnetic levitation train braking control method and a system, wherein the braking control method comprises the steps of triggering maximum-level landing braking when emergency braking is triggered, controlling all levitation electromagnets to lose electricity according to the maximum-level landing braking, and executing landing braking; when the emergency braking is not triggered, the braking force of the whole vehicle is calculated according to the braking instruction, the electric braking force and the landing braking force are distributed according to the braking force of the whole vehicle, the electric braking is executed according to the distributed electric braking force, the landing braking grade is calculated according to the distributed landing braking force, the power failure of the corresponding number of suspension electromagnets is controlled according to the landing braking grade, and the landing braking is executed. The invention eliminates the hydraulic braking system and solves the problems of heavy weight, more parts and inconvenient maintenance and overhaul caused by the existence of the hydraulic braking system.

Description

Magnetic levitation train braking control method and system
Technical Field
The invention belongs to the technical field of magnetic levitation trains, and particularly relates to a magnetic levitation train braking control method and system.
Background
The medium-low speed magnetic levitation train braking system consists of an electric braking system, a hydraulic braking system and a landing braking system, wherein the hydraulic braking system is realized by controlling a mechanical clamp by a hydraulic control unit, and the landing braking system realizes braking effect by landing all levitation points of the train under extreme conditions. The hydraulic braking system comprises an energy accumulator, an electrohydraulic control unit, a power management module, 15 pairs of clamps and pipelines distributed on the bottom of the vehicle, and has the defects of heavy weight, multiple parts and the like.
In recent years, the requirements of the maglev train on weight reduction are higher and higher, the requirements on new functions and intellectualization are higher and higher, the weight of the train and the crowded underframe space cannot meet the increasingly required installation requirements of the new functions and the intellectualization, and the crowded underframe space causes great inconvenience for maintenance and overhaul.
Therefore, how to achieve weight reduction and save installation space of chassis equipment is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a magnetic levitation train braking control method and system, which are used for solving the problems of large weight, more parts and inconvenience in maintenance and overhaul caused by the fact that a traditional braking system comprises a hydraulic braking system.
The invention solves the technical problems by the following technical scheme: a magnetic levitation train braking control method comprises the following steps:
step 1: judging whether emergency braking is triggered according to the braking instruction, if not, turning to step 2; if yes, triggering the maximum-stage vehicle-falling braking, and turning to step 5;
step 2: calculating the braking force of the whole vehicle according to the braking instruction;
step 3: distributing electric braking force and landing braking force according to the whole vehicle braking force;
step 4: performing electric braking according to the distributed electric braking force;
calculating a landing brake grade according to the distributed landing brake force;
step 5: and controlling the power failure of the corresponding number of suspension electromagnets according to the landing braking grade, and executing landing braking.
Further, in the step 2, a specific calculation formula of the braking force of the whole vehicle is as follows:
F＝G×a max ×η level bit -F Resistance force
Wherein F is the braking force of the whole vehicle, G is the total weight of the whole vehicle, and a max For maximum braking deceleration, eta Level bit For level of driver, F Resistance force The resistance to the whole car.
Further, in the step 3, the electric braking force and the landing braking force are distributed according to the braking force of the whole vehicle specifically includes:
step 3.1: judging whether the electric brake is effective, if so, turning to step 3.2;
if the electric braking is invalid, the allocated braking force of the falling vehicle is equal to the braking force of the whole vehicle, the allocated electric braking force is equal to zero, and the step 4 is carried out;
step 3.2: judging whether the braking force of the whole vehicle is smaller than or equal to the maximum electric braking force, if the braking force of the whole vehicle is smaller than or equal to the maximum electric braking force, distributing the electric braking force to be equal to the braking force of the whole vehicle, distributing the braking force of the falling vehicle to be equal to zero, and turning to the step 4;
if the whole vehicle braking force is larger than the maximum electric braking force, the whole vehicle braking force is equal to the sum of the distributed electric braking force and the distributed landing braking force, and the step 4 is carried out.
Further, in step 3.1, whether the electric brake is effective is determined according to feedback information of the traction inverter in the traction control system.
Further, in the step 3.2, when the braking force of the whole vehicle is greater than the maximum electric braking force, the distributed electric braking force is equal to the maximum electric braking force, and the distributed landing braking force is equal to the difference between the braking force of the whole vehicle and the maximum electric braking force.
Further, in the step 4, the step of calculating the landing brake level according to the allocated landing brake force specifically includes:
calculating the number of the suspension points of the falling vehicle according to the distributed braking force of the falling vehicle, wherein the specific formula is as follows:
wherein n is the number of suspension points for vehicle falling; f (F) Falling down For distributing the braking force for falling vehicles F Falling down ＝F-F Electric power F is the braking force of the whole vehicle, F Electric power For the distributed electric braking force; f (F) Single sheet A drop braking force for a single suspension point;
and determining the landing brake grade according to the number of the landing suspension points.
Further, the method comprises the steps of,
the specific calculation formula of the vehicle falling braking force of the single suspension point is as follows:
wherein N is the number of suspension points, G is the total weight of the whole vehicle, G is the gravity acceleration, and eta is the friction coefficient between the vehicle falling brake and the F rail.
Based on the same conception, the invention also provides a magnetic levitation train braking control system, which comprises an electric braking system, a landing braking system and a control system;
the control system is used for acquiring a braking instruction and judging whether emergency braking is triggered or not according to the braking instruction; when the emergency braking is not triggered, the braking force of the whole vehicle is calculated according to the braking instruction, the electric braking force and the landing braking force are distributed according to the braking force of the whole vehicle, the electric braking force instruction is generated according to the distributed electric braking force, the landing braking grade is calculated according to the distributed landing braking force, and the mechanical braking force instruction is generated; when the emergency braking is triggered, a mechanical braking force command is generated according to the maximum-level landing braking;
the electric brake system is used for executing electric braking according to the electric braking force command;
the vehicle-falling braking system is used for controlling the power failure of the corresponding number of suspension electromagnets according to the mechanical braking force command and executing vehicle-falling braking.
Further, the electric braking system comprises a traction control system and a linear motor, and the traction control system is used for controlling the linear motor to act according to the electric braking force command so as to realize electric braking.
Further, the drop brake system comprises a suspension controller, a plurality of suspension electromagnets and a drop brake; the suspension electromagnets are arranged on the suspension frame and used for providing suspension force for the train; the vehicle falling braking piece is arranged on the suspension frame and is used for contacting with the F rail when the suspension electromagnet is powered off to generate friction force so as to realize vehicle falling braking; the suspension controller is used for controlling the current of the suspension electromagnet to realize the floating and landing of the train.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
according to the invention, the landing brake grade is calculated according to the distributed landing brake force, the landing brake and the hydraulic brake are replaced by the classified landing brake, a hydraulic brake system is omitted, the weight and the cost are greatly reduced, the space of the underframe and the maintenance space are increased, and the problems of large weight, more parts and inconvenience for maintenance and overhaul caused by the existence of the hydraulic brake system are solved.
The invention utilizes the graded falling brake to supplement the charging and braking deficiency part, thereby ensuring the safety and effectiveness of the brake; the maximum-level vehicle falling braking action is used as emergency braking, so that the safety and effectiveness of the emergency braking are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawing in the description below is only one embodiment of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for controlling braking of a maglev train in an embodiment of the invention;
FIG. 2 is a flow chart of a calculation of a drop brake level in an embodiment of the present invention;
fig. 3 is a block diagram of a brake control system of a maglev train in an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully by reference to the accompanying drawings, in which it is shown, however, only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The technical scheme of the present application is described in detail below with specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
As shown in fig. 1, the method for controlling braking of a maglev train provided by the embodiment of the invention comprises the following steps:
step 1: acquiring a braking instruction of a driver controller or a vehicle safety loop, judging whether to trigger emergency braking according to the braking instruction, and if not, turning to step 2; if yes, triggering the maximum-stage vehicle-falling braking, and turning to step 5;
step 2: calculating the braking force of the whole vehicle according to the braking instruction;
step 3: distributing electric braking force and landing braking force according to the braking force of the whole vehicle;
step 4: performing electric braking according to the distributed electric braking force; calculating a landing brake grade according to the distributed landing brake force;
step 5: and controlling the corresponding number of suspension electromagnets to lose power according to the landing braking level, and executing landing braking.
In one embodiment of the present invention, a specific calculation formula of the braking force of the whole vehicle is:
F＝G×a max ×η level bit -F Resistance force (1)
Wherein F is the braking force of the whole vehicle; g is the total weight of the whole vehicle; a, a max Is the maximum braking deceleration; η (eta) Level bit The level of the driver is generally 1% -100%; f (F) Resistance force The resistance of the whole vehicle comprises the resistance of a current collector, wind resistance, magnetic resistance and the like.
In one embodiment of the present invention, in step 3, the electric braking force and the landing braking force are distributed according to the braking force of the whole vehicle specifically includes:
step 3.1: judging whether the electric brake is effective, if so, turning to step 3.2;
if the electric braking is invalid, the allocated braking force of the falling vehicle is equal to the braking force of the whole vehicle, the allocated electric braking force is equal to zero, and the step 4 is carried out;
step 3.2: judging whether the braking force of the whole vehicle is smaller than or equal to the maximum electric braking force, if the braking force of the whole vehicle is smaller than or equal to the maximum electric braking force, the distributed electric braking force is equal to the braking force of the whole vehicle, the distributed braking force of the falling vehicle is equal to zero, and turning to the step 4;
if the braking force of the whole vehicle is larger than the maximum electric braking force, the braking force of the whole vehicle is equal to the sum of the distributed electric braking force and the distributed landing braking force, and the step 4 is carried out.
In this embodiment, when the braking force of the whole vehicle is greater than the maximum electric braking force, the allocated electric braking force is equal to the maximum electric braking force, and the allocated landing braking force is equal to the difference between the braking force of the whole vehicle and the maximum electric braking force, that is, when the braking force of the whole vehicle is allocated, the electric braking is preferentially allocated.
The hydraulic braking system is canceled, the braking force of the whole vehicle is realized through electric braking and vehicle-falling braking, and when the electric braking is invalid, the braking force of the whole vehicle is realized through the vehicle-falling braking (namely, the braking force of the whole vehicle is completely distributed to the vehicle-falling braking), and the electric braking force is 0 (namely, the electric braking is not performed), so that the safe and effective braking when the electric braking is invalid is ensured; when the electric braking is effective, the braking force of the whole vehicle is preferentially distributed to the electric braking, and when the electric braking is insufficient, the electric braking is supplemented by the vehicle falling braking.
In this embodiment, whether the electric brake is effective is determined based on feedback information from the traction inverter in the traction control system.
In one embodiment of the present invention, as shown in fig. 2, the step of calculating the drop brake level according to the allocated drop brake force specifically includes:
step 4.1: calculating the number of the suspension points of the falling vehicle according to the distributed braking force of the falling vehicle, wherein the specific formula is as follows:
wherein n is the number of suspension points for vehicle falling; f (F) Falling down For distributing the braking force for falling vehicles F Falling down ＝F-F Electric power F is the braking force of the whole vehicle, F Electric power F when electric braking is not effective for distributed electric braking force Electric power Taking 0, when the electric brake is effective, F Electric power Taking the maximum electric braking force; f (F) Single sheet A drop braking force for a single suspension point;
step 4.2: and determining the drop brake grade according to the drop suspension point number.
In the present embodiment
The specific calculation formula of the vehicle falling braking force of the single suspension point is as follows:
wherein N is the number of suspension points, G is the total weight of the whole vehicle, G is the gravity acceleration, and eta is the friction coefficient between the vehicle falling brake and the F rail.
In step 4.2, when the number of suspension points for vehicle falling is N, the vehicle falling braking level is the nth level, and the maximum vehicle falling braking level is that all suspension points fall or land, namely that the N suspension points fall or land.
When triggering emergency braking, triggering the maximum-level vehicle-falling braking, controlling all suspension electromagnets to lose electricity according to the maximum-level vehicle-falling braking, and executing vehicle-falling braking; when the emergency braking is not triggered, the braking force of the whole vehicle is calculated according to the braking instruction, the electric braking force and the landing braking force are distributed according to the braking force of the whole vehicle, the electric braking is executed according to the distributed electric braking force, the landing braking grade is calculated according to the distributed landing braking force, the power failure of the corresponding number of suspension electromagnets is controlled according to the landing braking grade, and the landing braking is executed. The invention cancels the hydraulic braking system, realizes great weight reduction and cost reduction, increases the space of the underframe and the maintenance space, and solves the problems of heavy weight, more parts and inconvenience for maintenance and overhaul caused by the existence of the hydraulic braking system.
As shown in fig. 3, the embodiment of the invention also provides a magnetic levitation train braking control system, which comprises an electric braking system, a landing braking system and a control system. In this embodiment, the control system is a train network system, and the train network system is connected to the traction control system of the electric brake system and the suspension controller of the landing brake system through a communication cable.
The train network system is arranged in the carriage and used for acquiring a braking instruction and judging whether emergency braking is triggered according to the braking instruction; when the emergency braking is not triggered, the whole vehicle braking force is calculated according to a braking instruction (shown as a formula (1)), electric braking force and landing braking force are distributed according to the whole vehicle braking force, an electric braking force instruction is generated according to the distributed electric braking force, a landing braking grade is calculated according to the distributed landing braking force (shown as formulas (2) - (3)), and a mechanical braking force instruction is generated; when the emergency braking is triggered, a mechanical braking force command is generated according to the maximum-level landing braking.
An electric brake system for performing electric braking in accordance with an electric braking force command. In this embodiment, the electric brake system includes a traction control system and a linear motor, where the traction control system is mounted on the chassis and is used to control the movement of the linear motor according to the electric brake force command to implement electric braking, and to control the movement of the linear motor to implement traction control. The linear motor is mounted on the suspension frame and is used for providing traction and electric braking force under the action of the traction control system.
And the vehicle-falling braking system is used for controlling the corresponding number of suspension electromagnets to lose electricity according to the mechanical braking force command and executing vehicle-falling braking. In this embodiment, the landing brake system includes a suspension controller, a plurality of suspension electromagnets, and a landing brake. The plurality of suspension electromagnets are arranged on the suspension frame and are used for providing suspension force for the train, namely, after the suspension electromagnets are electrified, suction force is formed between the suspension electromagnets and the F rail, so that the train floats; after the suspension electromagnet is powered off, the corresponding suspension point drops or falls, and the falling brake is realized. The landing brake piece is arranged on the suspension frame and is used for contacting with the F rail when the suspension electromagnet is powered off, so that friction force is generated, landing brake is realized, and a supporting effect is achieved. In this embodiment, the landing brake is a vertical skid. The suspension controller is arranged on the chassis of the train body, and realizes suspension force adjustment by controlling the current of the suspension electromagnet, thereby realizing the floating and landing of the train.
In one specific embodiment of the invention, a train network system is respectively arranged at the head and tail of a train, and 20 suspension controllers, 10 suspension electromagnets and 20 vertical skids are arranged at each train; each section of vehicle is provided with 1 traction control system and 10 linear motors; the train network systems of each head car are communicated through a train communication bus; the train network system of each head car is communicated with the suspension controller through a train communication cable; the train network system of each head car is communicated with the traction control system through a train communication cable; the plurality of suspension controllers of each car are communicated through a train communication cable. Each set of train network system has the same structure and function, can independently operate, and can realize information interaction through a communication bus, thereby realizing cooperative work and switching of the head and tail train network systems for train control.
Under normal conditions, the main functions of the train network system are completed by the system at the driver's possession, and the systems at the non-possession are in a hot standby state.
For the train network system, a redundant configuration mode is adopted in each head car, so that the reliability of the control system is ensured. And 20 suspension controllers are arranged on each section of vehicle, so that the control reliability of the suspension electromagnet is ensured. And 10 suspension electromagnets are arranged on each section of the train, so that the stability of train suspension is ensured. And 20 vertical skids are arranged on each section of vehicle, so that the reliability of vehicle falling braking is ensured. Each section of vehicle is provided with 1 traction control system, so that the reliability of electric braking is ensured. And 10 linear motors are arranged on each section of vehicle, so that the reliability of electric braking is ensured.
The train network system acquires a braking instruction and calculates the braking force of the whole train, and selects a braking executing mechanism according to the effective condition of electric braking, the maximum electric braking force and the magnitude of the braking force of the whole train according to whether the emergency braking is triggered to apply different braking forces or not: traction control systems and/or levitation controllers. The traction control system controls the linear motor to apply electric braking according to the distributed electric braking force demand; the suspension controller controls the corresponding number of suspension electromagnets to drop according to the allocated drop braking force demand, and indirectly controls the friction between the vertical skids and the F cabinet to generate braking force, so that the safe and reliable braking of the train is realized.
According to the invention, the vertical skid and the F rail are rubbed to realize the landing braking during the landing braking, the landing braking is divided into different landing braking grades according to the number of the suspension points of the train, and the friction force corresponding to the landing of the suspension points with different numbers is utilized to realize the multistage landing braking force adjustment. The train network system is utilized to realize braking force management, and the control of suspension point landing is realized through a protocol between the train network system and the suspension controller; the hydraulic braking system is omitted, the weight and the space of the underframe are saved, the hydraulic braking pressing noise is reduced, and the hydraulic braking system is safe, green and reliable.
The foregoing disclosure is merely illustrative of specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art will readily recognize that changes and modifications are possible within the scope of the present invention.

Claims (10)

1. The magnetic levitation train braking control method is characterized by comprising the following steps of:
step 1: judging whether emergency braking is triggered according to the braking instruction, if not, turning to step 2; if yes, triggering the maximum-stage vehicle-falling braking, and turning to step 5;
step 2: calculating the braking force of the whole vehicle according to the braking instruction;
step 3: distributing electric braking force and landing braking force according to the whole vehicle braking force;
step 4: performing electric braking according to the distributed electric braking force;
calculating a landing brake grade according to the distributed landing brake force;
step 5: and controlling the power failure of the corresponding number of suspension electromagnets according to the landing braking grade, and executing landing braking.
2. The method for controlling braking of a maglev train according to claim 1, wherein in the step 2, a specific calculation formula of braking force of the whole train is as follows:
F＝G×a max ×η level bit -F Resistance force
Wherein F is the braking force of the whole vehicle, G is the total weight of the whole vehicle, and a max For maximum braking deceleration, eta Level bit For level of driver, F Resistance force The resistance to the whole car.
3. The method according to claim 1, wherein in the step 3, the step of distributing the electric braking force and the landing braking force according to the braking force of the whole vehicle specifically comprises:
step 3.1: judging whether the electric brake is effective, if so, turning to step 3.2;
if the electric braking is invalid, the allocated braking force of the falling vehicle is equal to the braking force of the whole vehicle, the allocated electric braking force is equal to zero, and the step 4 is carried out;
step 3.2: judging whether the braking force of the whole vehicle is smaller than or equal to the maximum electric braking force, if the braking force of the whole vehicle is smaller than or equal to the maximum electric braking force, distributing the electric braking force to be equal to the braking force of the whole vehicle, distributing the braking force of the falling vehicle to be equal to zero, and turning to the step 4;
if the whole vehicle braking force is larger than the maximum electric braking force, the whole vehicle braking force is equal to the sum of the distributed electric braking force and the distributed landing braking force, and the step 4 is carried out.
4. The method according to claim 3, wherein in step 3.1, it is determined whether the electric brake is effective according to feedback information of the traction inverter in the traction control system.
5. The method according to claim 3, wherein in the step 3.2, when the braking force of the whole vehicle is greater than the maximum electric braking force, the electric braking force is equal to the maximum electric braking force, and the landing braking force is equal to the difference between the braking force of the whole vehicle and the maximum electric braking force.
6. The method according to any one of claims 1 to 5, wherein in the step 4, the landing brake level is calculated based on the allocated landing brake force, and the method specifically comprises:
calculating the number of the suspension points of the falling vehicle according to the distributed braking force of the falling vehicle, wherein the specific formula is as follows:
wherein n is the number of suspension points for vehicle falling; f (F) Falling down For distributing the braking force for falling vehicles F Falling down ＝F-F Electric power F is the braking force of the whole vehicle, F Electric power For the distributed electric braking force; f (F) Single sheet A drop braking force for a single suspension point;
and determining the landing brake grade according to the number of the landing suspension points.
7. The method for controlling braking of a maglev train according to claim 6, wherein,
the specific calculation formula of the vehicle falling braking force of the single suspension point is as follows:
wherein N is the number of suspension points, G is the total weight of the whole vehicle, G is the gravity acceleration, and eta is the friction coefficient between the vehicle falling brake and the F rail.
8. A magnetic levitation train braking control system comprises an electric braking system, a landing braking system and a control system; the method is characterized in that:
the control system is used for acquiring a braking instruction and judging whether emergency braking is triggered or not according to the braking instruction; when the emergency braking is not triggered, the braking force of the whole vehicle is calculated according to the braking instruction, the electric braking force and the landing braking force are distributed according to the braking force of the whole vehicle, the electric braking force instruction is generated according to the distributed electric braking force, the landing braking grade is calculated according to the distributed landing braking force, and the mechanical braking force instruction is generated; when the emergency braking is triggered, a mechanical braking force command is generated according to the maximum-level landing braking;
the electric brake system is used for executing electric braking according to the electric braking force command;
the vehicle-falling braking system is used for controlling the power failure of the corresponding number of suspension electromagnets according to the mechanical braking force command and executing vehicle-falling braking.
9. The maglev train brake control system of claim 8, wherein: the electric braking system comprises a traction control system and a linear motor, and the traction control system is used for controlling the linear motor to act according to the electric braking force command so as to realize electric braking.
10. The maglev train brake control system of claim 8 or 9, wherein: the landing braking system comprises a suspension controller, a plurality of suspension electromagnets and a landing braking piece; the suspension electromagnets are arranged on the suspension frame and used for providing suspension force for the train; the vehicle falling braking piece is arranged on the suspension frame and is used for contacting with the F rail when the suspension electromagnet is powered off to generate friction force so as to realize vehicle falling braking; the suspension controller is used for controlling the current of the suspension electromagnet to realize the floating and landing of the train.
CN202410031007.3A 2024-01-09 2024-01-09 Magnetic levitation train braking control method and system Pending CN117601658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410031007.3A CN117601658A (en) 2024-01-09 2024-01-09 Magnetic levitation train braking control method and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410031007.3A CN117601658A (en) 2024-01-09 2024-01-09 Magnetic levitation train braking control method and system

Publications (1)

Publication Number Publication Date
CN117601658A true CN117601658A (en) 2024-02-27

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Application Number Title Priority Date Filing Date
CN202410031007.3A Pending CN117601658A (en) 2024-01-09 2024-01-09 Magnetic levitation train braking control method and system

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Country Link
CN (1) CN117601658A (en)

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