CN114715110B - Method and device for detecting short circuit fault of eddy current braking system - Google Patents

Method and device for detecting short circuit fault of eddy current braking system Download PDF

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Publication number
CN114715110B
CN114715110B CN202210407957.2A CN202210407957A CN114715110B CN 114715110 B CN114715110 B CN 114715110B CN 202210407957 A CN202210407957 A CN 202210407957A CN 114715110 B CN114715110 B CN 114715110B
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Prior art keywords
eddy current
current braking
braking device
braking system
resistance value
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CN114715110A (en
Inventor
陈嘉楠
殷振环
韩伟
刘冰
金炜
陈思默
张颖川
王可
王立超
蔡田
李松
曾一鸣
张波
杨伟君
曹宏发
赵红卫
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China Academy of Railway Sciences Corp Ltd CARS
Locomotive and Car Research Institute of CARS
Beijing Zongheng Electromechanical Technology Co Ltd
Tieke Aspect Tianjin Technology Development Co Ltd
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China Academy of Railway Sciences Corp Ltd CARS
Locomotive and Car Research Institute of CARS
Beijing Zongheng Electromechanical Technology Co Ltd
Tieke Aspect Tianjin Technology Development Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/228—Devices for monitoring or checking brake systems; Signal devices for railway vehicles
    • 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
    • B60L7/28—Eddy-current braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/415—Short-circuit, open circuit failure
    • 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
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The invention provides a method and a device for detecting short-circuit faults of an eddy current braking system, wherein the method comprises the following steps: acquiring a voltage value and a current value of an eddy current braking device in an eddy current braking system; determining the resistance value of the eddy current braking device according to the voltage value and the current value; and generating a short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device. The invention can detect the local short circuit of the eddy current braking device for diagnosing the eddy current braking system of the high-speed motor train unit, improves the safety of the eddy current braking system and the safety of train operation, avoids the long-term operation of a fault device, damages other equipment, and avoids the damage of a bogie of a vehicle or the burning loss of an eddy current braking electromagnet caused by the short circuit fault of an electromagnet, thereby causing larger economic loss.

Description

Method and device for detecting short circuit fault of eddy current braking system
Technical Field
The invention relates to a detection technology, in particular to a method and a device for detecting short-circuit faults of an eddy current braking system.
Background
The linear vortex braking is a non-adhesive braking technology, the vortex braking force is not limited by wheel track adhesion conditions, and the linear vortex braking can be used as an additional supplement for electric braking and friction braking, so that the technology is a key technology for further accelerating the high-speed motor train unit.
The eddy current braking system consists of an eddy current braking device, an eddy current control unit and an excitation power supply. The eddy current braking device is a final execution component for generating braking force and comprises an electromagnet, a dowel bar, a supporting lever and the like, wherein the electromagnet comprises a magnetic yoke beam, a coil assembly, an electric connecting piece and the like. When the eddy current braking is applied, the exciting power supply outputs exciting current to the coil assembly to form magnetic poles with N-S poles alternately arranged, and the relative motion of the alternating magnetic poles and the steel rail causes the surface of the steel rail to generate eddy current and form braking force parallel to the motion direction and suction force perpendicular to the motion direction under the action of a magnetic field. The eddy current brake assembly is typically mounted on the truck of the trailer with the electromagnet positioned between the wheels parallel to the rail.
Because the electromagnet of the vortex brake device is exposed in the environment outside the vehicle, the electromagnet is influenced by the environment such as rainwater, ice and snow, sand and the like for a long time and possibly is hit by foreign matters, the electric protection is possibly invalid, the local short circuit of the electromagnet is generated, and the safety of the train is endangered: (1) The braking force and the suction force generated by the electromagnets at two sides of the eddy current braking device are unbalanced, so that the eddy current braking device and the bogie are stressed unevenly, and the eddy current braking device or the bogie is damaged; (2) The electrical characteristics of the eddy current braking device change, which affects the current control of the excitation power supply, resulting in burning loss of the electromagnet. Therefore, in order to avoid the serious consequences, it is necessary to establish a monitoring mechanism for the electrical connection state of the coil assembly, so that the exciting power supply can identify the short-circuit fault of the electromagnet and perform emergency protection.
Disclosure of Invention
In order to detect a short-circuit fault of an electromagnet of an eddy current braking device of an eddy current braking system, the invention provides a method for detecting the short-circuit fault of the eddy current braking system, which comprises the following steps:
acquiring a voltage value and a current value of an eddy current braking device in an eddy current braking system;
determining the resistance value of the eddy current braking device according to the voltage value and the current value;
and generating a short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device.
In the embodiment of the present invention, the generating the detection result of the short-circuit fault of the eddy current braking system according to the determined resistance value of the eddy current braking device includes:
determining the resistance difference of the eddy current braking device in the eddy current braking system according to the determined resistance value of the eddy current braking device;
and when the determined resistance difference is larger than a preset deviation threshold value, determining that the eddy current braking device in the eddy current braking system has short circuit fault.
In the embodiment of the present invention, the generating the detection result of the short-circuit fault of the eddy current braking system according to the determined resistance value of the eddy current braking device includes:
when the determined resistance difference is not greater than a preset deviation threshold value, acquiring a reasonable resistance value of the eddy current braking device which is pre-determined;
and determining that the resistance value of the eddy current braking device does not accord with the reasonable resistance value, and determining that the eddy current braking device in the eddy current braking system has short circuit fault.
In the embodiment of the invention, the reasonable resistance values of the pre-determined eddy current braking device comprise:
acquiring the working environment temperature of the eddy current braking device;
and determining a reasonable resistance value of the eddy current braking device according to the working environment temperature.
In an embodiment of the present invention, the obtaining a voltage value and a current value of an eddy current braking device in an eddy current braking system includes:
sampling the output voltage and the output current of an excitation power supply of the eddy current braking system;
and determining the voltage value and the current value of an eddy current braking device in the eddy current braking system according to the sampling result.
Meanwhile, the invention also provides a short-circuit fault detection device of the eddy current braking system, which comprises:
the current and voltage value acquisition module is used for acquiring the voltage value and the current value of an eddy current braking device in the eddy current braking system;
the resistance value determining module is used for determining the resistance value of the eddy current braking device according to the voltage value and the current value;
and the fault detection module is used for generating a short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device.
In an embodiment of the present invention, the fault detection module includes:
the resistance difference determining unit is used for determining the resistance difference of the eddy current braking device in the eddy current braking system according to the determined resistance value of the eddy current braking device;
and the result generation unit is used for determining that the eddy current braking device in the eddy current braking system has short circuit fault when the determined resistance difference is larger than a preset deviation threshold value.
In an embodiment of the present invention, the fault detection module further includes:
the reasonable resistance value acquisition unit is used for acquiring a preselected reasonable resistance value of the eddy current braking device when the determined resistance value difference is not larger than a preset deviation threshold value;
and the result generating unit is used for determining that the resistance value of the eddy current braking device does not accord with the reasonable resistance value, and determining that the eddy current braking device in the eddy current braking system has short circuit fault.
The invention also provides a computer device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the method.
Meanwhile, the invention also provides a computer readable storage medium which stores a computer program for executing the method.
The method and the device for detecting the short-circuit fault of the eddy current braking system can detect the local short-circuit of the eddy current braking device of the eddy current motor train unit, can diagnose and protect the local short-circuit fault of the eddy current braking device, improve the safety of the eddy current braking system and the safety of train operation, guide personnel to conduct special inspection and maintenance on the fault device, avoid the long-term operation of the fault device, damage other equipment, and avoid the damage of a bogie of a vehicle or the burning loss of an eddy current braking electromagnet caused by the short-circuit fault of an electromagnet, thereby causing larger economic loss.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may 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 detecting a short circuit fault of an eddy current braking system according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of the present invention;
FIG. 3 is a flow chart of an embodiment of the present invention;
FIG. 4 is a block diagram of the eddy current braking system short circuit fault detection device provided by the invention;
fig. 5 is a schematic diagram of an electronic device according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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 invention provides a method for detecting short-circuit faults of an eddy-current braking system, which is characterized in that an electromagnet of the eddy-current braking device is exposed in an external environment of a vehicle and is influenced by the environment such as rainwater, ice and snow, sand wind and the like for a long time and possibly subjected to foreign matter striking, electric protection is possibly invalid, local short circuit of the electromagnet is generated, and the safety of a train is endangered.
As shown in fig. 1, a flow chart of a method for detecting a short-circuit fault of an eddy current braking system according to the present invention includes:
step S101, obtaining a voltage value and a current value of an eddy current braking device in an eddy current braking system;
step S102, determining the resistance value of the eddy current braking device according to the voltage value and the current value;
and step S103, generating a short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device.
According to the short-circuit fault detection method of the eddy current braking system, the resistance value of the eddy current braking device is determined according to the voltage value and the current value of the eddy current braking device in the eddy current braking system, and the fault detection result is generated according to the determined resistance value, so that the short-circuit fault of the electromagnet can be identified according to the voltage and current signals of the exciting power supply, and emergency protection is carried out.
In an embodiment of the present invention, the obtaining a voltage value and a current value of an eddy current braking device in an eddy current braking system includes:
sampling the output voltage and the output current of an excitation power supply of the eddy current braking system;
and determining the voltage value and the current value of an eddy current braking device in the eddy current braking system according to the sampling result.
Specifically, in the embodiment of the present invention, the generating the detection result of the short-circuit fault of the eddy current braking system according to the determined resistance value of the eddy current braking device includes:
determining the resistance difference of the eddy current braking device in the eddy current braking system according to the determined resistance value of the eddy current braking device;
and when the determined resistance difference is larger than a preset deviation threshold value, determining that the eddy current braking device in the eddy current braking system has short circuit fault.
In the embodiment of the invention, the eddy current braking system comprises two sets of eddy current braking devices, a coil assembly of each eddy current braking device is formed by winding an enameled wire, and the main electrical parameter is a resistance value. The exciting power supply outputs continuously adjustable current to the eddy current braking device according to the instruction of the eddy current control unit. The exciting power supply can calculate the resistance value of the electromagnet according to the change condition of the output voltage.
According to the operation condition of the vortex brake system, the resistance value of the vortex brake device is mainly influenced by the following factors:
the number of the series electromagnets is larger, the resistance value is larger, and the resistance value and the series number are in a linear relation.
In the embodiment of the invention, the resistance value and the temperature of the eddy current braking device in the eddy current braking system accord with the following formula relation:
Figure BDA0003602828440000051
wherein R is 1 、R 2 Respectively, the eddy current braking devices are at T 1 、T 2 Resistance under temperature conditions, wherein R 1 、T 1 Through experimental determination, in the embodiment of the invention, the arbitrary temperature T is determined by utilizing the formula 2 Resistance R of vortex brake device under condition 2 And when the resistance difference of the two sets of eddy current braking device resistors is larger than a preset deviation threshold value, determining that the eddy current braking devices in the eddy current braking system have short circuit faults.
In the process of applying the eddy-current brake, when the eddy-current brake device is locally shorted, coil assemblies among the shorted points are bypassed, which is equivalent to the reduction of the number of the coil assemblies connected in series, and the resistance value is reduced; on the other hand, the coil is continuously energized to heat the winding, and the resistance increases. The resistance value changes in real time, and the resistance value changes in opposite directions due to different reasons, and whether short circuit fault occurs is judged to be difficult only according to the resistance value of one set of eddy current braking device.
Based on the characteristics of the above eddy current brake configuration, the localized short circuit fault of the eddy current brake configuration can be diagnosed as follows:
mode (1), diagnosing a local short-circuit fault of the eddy current brake device according to whether the resistance deviation of the two sets of eddy current brake devices is excessive or not:
the 1 excitation power supply simultaneously supplies power to the eddy current braking devices on the 2 bogies, the electrical characteristics of the eddy current braking devices are the same, the flowing currents are the same, the heating and radiating conditions are approximate, and when any 1 eddy current braking device on the 2 bogies is abnormal or the excitation power supply is abnormal, the excitation power supply stops protecting, and the braking devices on the 2 bogies have no current, so that the temperature of the eddy current braking devices on the 2 bogies is close, and the resistance value is close.
The eddy current braking device generates a partial short circuit fault which is a small probability event, so that the probability that the eddy current braking devices on 2 bogies generate the partial short circuit fault simultaneously and the short circuit phenomenon is completely the same is extremely low, after the eddy current braking devices on 1 bogie generate the partial short circuit fault, the exciting power supply detects that the resistance values of the eddy current braking devices on 2 bogies generate deviation, when the deviation is overlarge and lasts for a certain time, namely, the determined resistance value difference is larger than a preset deviation threshold value and exceeds a preset time period, the eddy current braking device with a larger resistance value is judged to be in a normal working condition, and the eddy current braking device with a smaller resistance value generates the partial short circuit fault.
Further, in an embodiment of the present invention, the generating the detection result of the short-circuit fault of the eddy current braking system according to the determined resistance value of the eddy current braking device further includes:
when the determined resistance difference is not greater than a preset deviation threshold value, acquiring a reasonable resistance value of the eddy current braking device which is pre-determined;
and determining that the resistance value of the eddy current braking device does not accord with the reasonable resistance value, and determining that the eddy current braking device in the eddy current braking system has short circuit fault.
And (2) diagnosing whether the eddy current braking device has a local short circuit fault or not according to whether the resistance value of the eddy current braking device is reasonable.
The resistance value is affected by the temperature of the electromagnet, in this embodiment, the working environment range of the eddy current braking device is-40 to 160 ℃ with reference to the related technical standard of the high-speed motor train unit, so that the exciting power supply detects the theoretical resistance value when the resistance value of the eddy current braking device is not lower than-40 ℃ under any condition, and it should be noted that in this embodiment, the working environment temperature range is only used for explaining this embodiment, and the temperature range is not limited.
When the exciting power supply outputs current, the resistance value of the eddy current braking device is calculated to be lower than the theoretical resistance value at the lowest ambient temperature and is continued for a period of time, and the eddy current braking device is judged to have a local short circuit fault. And determining that the resistance value of the eddy current braking device does not accord with the reasonable resistance value and exceeds a preset time period, and determining that the eddy current braking device in the eddy current braking system has a short circuit fault.
The above two fault diagnosis modes can be used simultaneously, and the mode (2) is an important supplement to the mode (1). The mode (1) can accurately identify a coil short circuit by detecting the resistance difference of the two bogies through an analogy method, and the mode (2) can be used as a bottom protection measure when the eddy current braking devices on the 2 bogies have local short circuit faults.
When the exciting power supply detects that the eddy current braking device has a local short circuit fault, current output is stopped immediately, and fault information is sent to a train control system.
In an embodiment of the present invention, as shown in fig. 2, the exciting power source is composed of two independent power supply modules, the input side is connected to the middle dc link of the traction converter, and the output side is respectively connected to the braking devices of the two bogies. The exciting power supply takes electricity from the middle direct current link of the traction converter, and outputs continuously adjustable current to the braking device after a series of conversion. In this embodiment, each braking device includes two groups of electromagnets, each group includes coil assemblies having the same number and the same electrical characteristics, all the coil assemblies are connected in series, and are uniformly supplied with power by an excitation power source.
In this embodiment, the method for diagnosing a local short-circuit fault of an eddy current braking device is shown in fig. 3, and specifically includes the following steps:
and (3) two independent power supply modules in the excitation power supply in the step (1) respectively supply power to the eddy current braking devices on 2 bogies of the same vehicle, the output currents are the same, and the electrical parameters of the eddy current braking devices on each bogie are the same.
And (2) the exciting power supply calculates the resistance values of the eddy current braking devices on the 2 bogies according to the sampling values of the output voltage and the output current.
And (3) judging that the eddy current braking devices with larger resistance are in normal working conditions after the exciting power supply detects that the resistance deviation of the eddy current braking devices on the 2 bogies is overlarge and lasts for a certain time, wherein the eddy current braking devices with smaller resistance have local short circuit faults. When the exciting power supply detects that the resistance deviation of the eddy current braking devices on the 2 bogies is normal, the following step (4) is carried out.
And (4) judging that the eddy current braking device has a local short circuit fault after the exciting power supply calculates that the resistance value of the eddy current braking device is lower than the theoretical resistance value at the lowest ambient temperature and lasts for a period of time.
Step (5), when the exciting power supply detects a local short circuit fault in the step (3) or the step (4), simultaneously blocking the power supply of the eddy current braking devices on 2 bogies, and stopping the exciting power supply for protection;
and (6) no fault occurs, and the exciting power supply operates normally.
And in the process of supplying power to the eddy current braking device by the excitation power supply, the state of the electromagnet is monitored in real time according to the steps. Wherein steps (3) and (4) are key steps for detecting and diagnosing a local short-circuit fault, wherein:
and step (3) adopts the local short-circuit fault diagnosis mode (1) in the foregoing, so that the local short-circuit fault of the eddy current braking device can be diagnosed more accurately at any temperature.
When a deviation is detected, if the resistance R of the eddy current brake configuration 1 is 1 Higher resistance R of the vortex brake device 2 2 If the temperature is lower, assuming that the device 1 has no fault, the device 2 has a local short circuit fault, and the resistance difference deltar= |r of the two eddy current braking devices 1 -R 2 The I is the resistance value of the electromagnet bypassed by the short circuit point, the eddy current braking device is formed by connecting a plurality of electromagnets in series, and the proportion of the number of the electromagnets between the short circuit points to the total number is delta R/R 1 。
The higher the accuracy of the exciting power supply in calculating the number of electromagnets between the short circuit points is, the more accurate the diagnosis of the local short circuit fault is, and the calculation accuracy is mainly related to the accuracy of exciting power supply current and voltage sensors and is irrelevant to temperature.
If the eddy current braking device 1 and the eddy current braking device 2 have a local short circuit fault at the same time and the number of short circuit coils is the same under the extremely small possibility, the diagnosis accuracy of step (3) will be lowered, and even the fault cannot be diagnosed.
And (4) adopting the local short-circuit fault diagnosis mode (2) in the previous step, namely diagnosing whether the eddy-current braking device has a local short-circuit fault or not according to whether the resistance value of the eddy-current braking device is equal to the resistance value of the eddy-current braking device. The diagnostic accuracy of this step is not affected by the simultaneous occurrence of local short-circuit faults in the eddy current brake configuration 1 and the eddy current brake configuration 2.
In the embodiment of the invention, the software of the excitation power supply presets the resistance R of the eddy current braking device at the temperature of minus 40 DEG C L When detecting that the resistance value R of the device is less than R at a certain moment L And judging that the device has local short circuit fault.
Wherein, the resistance value of the eddy current braking device meets the requirement at any temperature T (-40 ℃ < T < 160 ℃)
Figure BDA0003602828440000081
When a local short circuit occurs and the proportion of the number of electromagnets between the short circuit points to the total number is greater than (T+40)/(T+234.5), the exciting power supply can diagnose faults. The calculation can be known that:
when the temperature of the electromagnets is-40 ℃, short circuit faults with the proportion of the number of the electromagnets among the short circuit points accounting for more than 0 in total number can be identified;
when the electromagnet temperature is 160 ℃, short-circuit faults with the proportion of the number of the electromagnets between the short-circuit points being more than 50.7% of the total number can be identified.
Thus, the accuracy of step (4) is related to the excitation supply current and voltage sensor accuracy and temperature.
According to the diagnosis method for the short circuit of the electromagnet, when the electromagnet of the eddy current braking device has a local short circuit fault, the exciting power supply can judge the fault of the eddy current braking device according to the diagnosis method and protect the fault. The method for diagnosing the local short circuit of the eddy current braking device, which is suitable for the eddy current braking system of the high-speed motor train unit, has the following beneficial effects:
(1) The safety of the eddy current braking system is improved:
the local short circuit of the eddy current braking device is caused by the fact that the electromagnet is exposed to the outside environment of the vehicle and is hit by foreign matters such as rainwater, ice and broken stone for a long time, and the electrical protection of the electromagnet is possibly invalid. After the fault occurs, the electromagnets between the short circuit points are bypassed, so that the braking force actually exerted by the eddy current braking system is reduced, and in severe cases, the electromagnetic force generated by the electromagnets on two sides of the same eddy current braking device is unbalanced, so that the stress of the eddy current braking device and the bogie is unbalanced, and equipment damage is caused. According to the method provided by the invention, the exciting power supply can diagnose and protect the local short circuit fault of the eddy current braking device, so that the safety of an eddy current braking system and the running safety of a train are improved.
(2) Improving the maintainability of the eddy current braking system:
the risk of local short circuits cannot be eliminated by routine maintenance of the eddy current brake electromagnets. According to the method provided by the invention, the exciting power supply can diagnose the local short-circuit fault of the eddy current braking device, and the fault information can guide personnel to perform special inspection and maintenance on the fault device, so that the fault device is prevented from operating for a long time and damaging other equipment.
(3) Improving the economy of the eddy current braking system:
after the excitation power supply in the eddy current braking system diagnoses the local short circuit fault of the eddy current braking device, the faulty coil component or the electrical connecting piece is replaced, and the eddy current braking device can be normally used. And the damage of the bogie of the vehicle or the burning loss of the eddy-current braking electromagnet caused by the short-circuit fault of the electromagnet is avoided, so that the larger economic loss is caused.
Meanwhile, the invention also provides a short-circuit fault detection device of the eddy current braking system, as shown in fig. 4, the device comprises:
a current-voltage value acquisition module 401, configured to acquire a voltage value and a current value of an eddy current braking device in an eddy current braking system;
a resistance value determination module 402 for determining a resistance value of the eddy current brake configuration based on the voltage value and the current value;
the fault detection module 403 is configured to generate a short-circuit fault detection result of the eddy current braking configuration according to the determined resistance value of the eddy current braking configuration.
In the embodiment of the present invention, the fault detection module 403 includes:
the resistance difference determining unit is used for determining the resistance difference of the eddy current braking device in the eddy current braking system according to the determined resistance value of the eddy current braking device;
and the result generation unit is used for determining that the eddy current braking device in the eddy current braking system has short circuit fault when the determined resistance difference is larger than a preset deviation threshold value.
In the embodiment of the present invention, the fault detection module 403 further includes:
the reasonable resistance value acquisition unit is used for acquiring a preselected reasonable resistance value of the eddy current braking device when the determined resistance value difference is not larger than a preset deviation threshold value;
and the result generating unit is used for determining that the resistance value of the eddy current braking device does not accord with the reasonable resistance value, and determining that the eddy current braking device in the eddy current braking system has short circuit fault.
The implementation manner of the short-circuit fault detection device for the eddy current braking system provided by the invention can be clearly known to those skilled in the art through the description of the foregoing embodiments, and will not be repeated here.
Meanwhile, the embodiment also provides an electronic device, which may be a desktop computer, a tablet computer, a mobile terminal, a special purpose computer, an industrial control computer, an embedded computer, or the like, and the embodiment is not limited thereto. In this embodiment, the electronic device may refer to the embodiments of the foregoing method and apparatus, and the content thereof is incorporated herein, and the repetition is not repeated.
Fig. 5 is a schematic block diagram of a system configuration of an electronic device 600 according to an embodiment of the present invention. As shown in fig. 5, the electronic device 600 may include a central processor 100 and a memory 140; memory 140 is coupled to central processor 100. Notably, the diagram is exemplary; other types of structures may also be used in addition to or in place of the structures to implement telecommunications functions or other functions.
In one embodiment, the eddy current braking system short fault detection function may be integrated into the central processing unit 100. Wherein the central processor 100 may be configured to control as follows:
acquiring a voltage value and a current value of an eddy current braking device in an eddy current braking system;
determining the resistance value of the eddy current braking device according to the voltage value and the current value;
generating a short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device
In another embodiment, the eddy current braking system short circuit fault detection device may be configured separately from the central processing unit 100, for example, the eddy current braking system short circuit fault detection device may be configured as a chip connected to the central processing unit 100, and the eddy current braking system short circuit fault detection function is implemented by control of the central processing unit.
As shown in fig. 5, the electronic device 600 may further include: a communication module 110, an input unit 120, a display 160, a power supply 170. It is noted that the electronic device 600 need not include all of the components shown in fig. 5; in addition, the electronic device 600 may further include components not shown in fig. 5, to which reference is made to the prior art.
As shown in fig. 5, the central processor 100, sometimes also referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device, which central processor 100 receives inputs and controls the operation of the various components of the electronic device 600.
The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. And the central processor 100 can execute the program stored in the memory 140 to realize information storage or processing, etc.
The input unit 120 provides an input to the central processor 100. The input unit 120 is, for example, a key or a touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used for displaying display objects such as images and characters. The display may be, for example, but not limited to, an LCD display.
The memory 140 may be a solid state memory such as Read Only Memory (ROM), random Access Memory (RAM), SIM card, or the like. But also a memory which holds information even when powered down, can be selectively erased and provided with further data, an example of which is sometimes referred to as EPROM or the like. Memory 140 may also be some other type of device. Memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application/function storage 142, the application/function storage 142 for storing application programs and function programs or a flow for executing operations of the electronic device 600 by the central processor 100.
The memory 140 may also include a data store 143, the data store 143 for storing data, such as contacts, digital data, pictures, sounds, and/or any other data used by the electronic device. The driver storage 144 of the memory 140 may include various drivers of the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging applications, address book applications, etc.).
The communication module 110 is a transmitter/receiver 110 that transmits and receives signals via an antenna 111. A communication module (transmitter/receiver) 110 is coupled to the central processor 100 to provide an input signal and receive an output signal, which may be the same as in the case of a conventional mobile communication terminal.
Based on different communication technologies, a plurality of communication modules 110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, etc., may be provided in the same electronic device.
The embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in an electronic device, the program causes a computer to execute the eddy current braking system short fault detection method as described in the above embodiment in the electronic device.
The embodiment of the invention also provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the eddy current braking system short circuit fault detection described in the above embodiment in an electronic device.
Preferred embodiments of the present invention are described above with reference to the accompanying drawings. The many features and advantages of the embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the embodiments which fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims (6)

1. A method for detecting a short-circuit fault in an eddy current braking system, said method comprising:
acquiring a voltage value and a current value of an eddy current braking device in an eddy current braking system;
determining the resistance value of the eddy current braking device according to the voltage value and the current value;
generating a short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device;
the method for generating the short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device comprises the following steps:
determining the resistance difference of the eddy current braking device in the eddy current braking system according to the determined resistance value of the eddy current braking device;
when the determined resistance difference is larger than a preset deviation threshold value, determining that a short circuit fault occurs in an eddy current braking device in the eddy current braking system;
when the determined resistance difference is not greater than a preset deviation threshold value, acquiring a preset reasonable resistance of the eddy current braking device; and when the resistance value of the eddy current braking device is determined to be not in accordance with the reasonable resistance value, determining that the eddy current braking device in the eddy current braking system has a short circuit fault.
2. The method for detecting a short-circuit fault in an eddy current braking system as claimed in claim 1 wherein said predetermined reasonable resistance of the eddy current braking configuration comprises:
acquiring the working environment temperature of the eddy current braking device;
and determining a reasonable resistance value of the eddy current braking device according to the working environment temperature.
3. The method for detecting a short-circuit fault in an eddy current braking system as claimed in claim 1 wherein said obtaining the voltage and current values of the eddy current braking device in the eddy current braking system comprises:
sampling the output voltage and the output current of an excitation power supply of the eddy current braking system;
and determining the voltage value and the current value of an eddy current braking device in the eddy current braking system according to the sampling result.
4. A short circuit fault detection device for an eddy current braking system, said device comprising:
the current and voltage value acquisition module is used for acquiring the voltage value and the current value of an eddy current braking device in the eddy current braking system;
the resistance value determining module is used for determining the resistance value of the eddy current braking device according to the voltage value and the current value;
the fault detection module is used for generating a short-circuit fault detection result of the eddy current braking system according to the determined resistance value of the eddy current braking device;
wherein, the fault detection module includes:
the resistance difference determining unit is used for determining the resistance difference of the eddy current braking device in the eddy current braking system according to the determined resistance value of the eddy current braking device;
the result generating unit is used for determining that the eddy current braking device in the eddy current braking system has a short circuit fault when the determined resistance difference is larger than a preset deviation threshold value;
the reasonable resistance value acquisition unit is used for acquiring a preset reasonable resistance value of the eddy current braking device when the determined resistance value difference is not larger than a preset deviation threshold value;
the result generation unit is further configured to: and when the resistance value of the eddy current braking device is determined to be not in accordance with the reasonable resistance value, determining that the eddy current braking device in the eddy current braking system has a short circuit fault.
5. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 3 when executing the computer program.
6. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program for executing the method of any one of claims 1 to 3.
CN202210407957.2A 2022-04-19 2022-04-19 Method and device for detecting short circuit fault of eddy current braking system Active CN114715110B (en)

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CN101030754A (en) * 2007-02-12 2007-09-05 盐城市步高汽配制造有限公司 Stepless torque braking controller of electric vortex speed releaser
CN201717818U (en) * 2010-06-09 2011-01-19 深圳市特尔佳科技股份有限公司 Drive controller of eddy current retarder
CN103197188A (en) * 2013-03-05 2013-07-10 上海翼锐汽车科技有限公司 Battery current sensor fault diagnosis system and method thereof
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