CN114715110A - 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
CN114715110A
CN114715110A CN202210407957.2A CN202210407957A CN114715110A CN 114715110 A CN114715110 A CN 114715110A CN 202210407957 A CN202210407957 A CN 202210407957A CN 114715110 A CN114715110 A CN 114715110A
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Prior art keywords
eddy current
current braking
resistance value
braking system
braking device
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CN114715110B (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 fault 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 method can detect 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 damage to other equipment caused by long-term operation of a fault device, and avoids greater economic loss caused by damage to a vehicle bogie or burning loss of the eddy current braking electromagnet due to short circuit fault of the electromagnet.

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 a short-circuit fault of an eddy current braking system.
Background
The linear eddy current brake is a non-adhesive brake technology, the eddy current brake force is not limited by the wheel-rail adhesion condition, and the linear eddy current brake can be used as an additional supplement for electric brake and friction brake, so the linear eddy current brake is a key technology for further increasing the speed of a 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 brake device is a final execution component for generating braking force, and comprises an electromagnet, a dowel bar, a support lever and the like, wherein the electromagnet comprises a magnetic yoke beam, a coil assembly, an electrical connecting piece and the like. When eddy current brake is applied, the exciting power supply outputs exciting current to the coil assembly to form alternately arranged N-S poles, and the relative motion between the alternate poles and the steel rail makes the surface of the steel rail generate eddy current to form braking force parallel to the motion direction and attraction perpendicular to the motion direction under the action of magnetic field. Eddy current brakes are typically mounted on the trailer bogie with an electromagnet positioned between the two wheels and parallel to the rail.
Because eddy current arresting gear's electro-magnet exposes in the car external environment, receives environmental impact such as rainwater, ice and snow, sand blown by the wind for a long time and probably suffers the foreign matter and strikes, probably arouses the electrical protection inefficacy, takes place the local short circuit of electro-magnet, and then endangers train safety: (1) the braking force and the suction force generated by the electromagnets at the two sides of the eddy current braking device are not balanced, so that the eddy current braking device and the bogie are stressed unevenly, and the structure of 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 the burning loss of the electromagnet. Therefore, in order to avoid the above serious consequences, it is necessary to establish a monitoring mechanism for the electrical connection status of the coil, so that the excitation power supply can identify the short-circuit fault of the electromagnet and perform emergency protection.
Disclosure of Invention
In order to detect the short-circuit fault of the electromagnet of the eddy current braking device of the eddy current braking system, the invention provides a short-circuit fault detection method 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 an embodiment of the present invention, the 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 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 a short-circuit fault.
In an embodiment of the present invention, the 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 includes:
when the determined resistance difference is not larger than the preset deviation threshold value, obtaining the reasonable resistance value of the preselected and determined eddy current brake device;
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 an embodiment of the invention, said preselectively determining a reasonable resistance value of the eddy current braking device comprises:
acquiring the working environment temperature of the eddy current braking device;
and determining the 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 device for detecting the short-circuit fault of the eddy current braking system, which comprises:
the current-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 the embodiment of the present invention, the fault detection module includes:
the resistance value difference determining unit is used for determining the resistance value 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 a short-circuit fault when the determined resistance value difference is larger than a preset deviation threshold value.
In the embodiment of the present invention, the fault detection module further includes:
the reasonable resistance value obtaining unit is used for obtaining the reasonable resistance value of the preselected and determined eddy current braking device when the determined resistance value difference is not larger than the 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 then determining that the eddy current braking device in the eddy current braking system has short-circuit fault.
Meanwhile, the invention also provides computer equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the method when executing the computer program.
Meanwhile, the invention also provides a computer readable storage medium, and a computer program for executing the method is stored in the computer readable storage medium.
The eddy current braking system short circuit fault detection method and device provided by the invention can be used for detecting local short circuit of an eddy current braking device for diagnosing the eddy current braking system of a high-speed motor train unit, diagnosing the local short circuit fault of the eddy current braking device and protecting the local short circuit fault, improving the safety of the eddy current braking system and the safety of train operation, guiding personnel to carry out special inspection and maintenance on the fault device, avoiding the damage to other equipment due to long-term operation of the fault device and avoiding the damage to a vehicle bogie or the burning loss of an eddy current braking electromagnet due to the short circuit fault of the electromagnet and causing greater economic loss.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
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 in an embodiment of the invention;
FIG. 4 is a block diagram of an eddy current braking system short circuit fault detection apparatus provided in the present invention;
fig. 5 is a schematic diagram of an electronic device in an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a short-circuit fault detection method of an eddy current braking system, which enables an excitation power supply to identify short-circuit faults of electromagnets and carry out emergency protection.
As shown in fig. 1, a flowchart of a method for detecting a short-circuit fault of an eddy current braking system according to the present invention includes:
step S101, acquiring 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.
The eddy current braking system short-circuit fault detection method provided by the invention determines the resistance value according to the voltage value and the current value of an eddy current braking device in the eddy current braking system, and generates the fault detection result according to the determined resistance value, thereby realizing that the electromagnet short-circuit fault can be identified and the emergency protection can be carried out according to the voltage and current signals of an excitation power supply.
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 an embodiment of the present invention, the 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 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 a short-circuit fault.
In the embodiment of the invention, the eddy current braking system comprises two sets of eddy current braking devices, coil assemblies of the eddy current braking devices are formed by winding enameled wires, and the main electrical parameter is a resistance value. The excitation power supply outputs continuously adjustable current to the eddy current brake device according to the instruction of the eddy current control unit. The resistance value of the electromagnet can be calculated by the excitation power supply according to the change condition of the output voltage.
According to the operating mode of the eddy current braking system, the resistance value of the eddy current braking device is mainly affected by the following factors:
the more the number of the series electromagnets is, the larger the resistance value is, 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 an eddy current braking device in an eddy current braking system conform to the following formula relation:
Figure BDA0003602828440000051
wherein R is1、R2Respectively eddy current brake at T1、T2Resistance under temperature conditions, wherein R1、T1Through experimental determination, in the embodiment of the invention, the arbitrary temperature T is determined by using the formula2Resistance R of an eddy current brake under conditions2And when the resistance value 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 eddy current brake application process, when the eddy current brake device is locally short-circuited, the coil assemblies between the short-circuit points are bypassed, the number of the coil assemblies equivalent to the number of the coil assemblies connected in series is reduced, and the resistance value is reduced; on the other hand, the coil is continuously energized, and the coil generates heat, thereby increasing the resistance value. Because the resistance value changes in real time and the resistance values caused by different reasons have opposite change trends, whether short-circuit faults occur or not is judged to be difficult only according to the resistance value of one set of eddy current braking device.
According to the above characteristics of the eddy current braking device, a local short-circuit fault of the eddy current braking device can be diagnosed as follows:
the method comprises the following steps of diagnosing local short-circuit faults of the eddy current braking devices according to whether the resistance value deviation of the two sets of eddy current braking devices is too large:
1 excitation power supply is the eddy current arresting gear power supply on 2 bogies simultaneously, and eddy current arresting gear's electrical characteristic is the same, and the electric current that flows is the same, and it is similar with the heat dissipation condition to generate heat, and appears unusually when arbitrary 1 eddy current arresting gear on 2 bogies, or excitation power supply is unusual, excitation power supply shutdown protection, and the arresting gear on 2 bogies all has no current, therefore the eddy current arresting gear temperature on 2 bogies is close, and the resistance value is close.
The local short-circuit fault of the eddy current braking device is a small-probability event, so that the local short-circuit faults of the eddy current braking devices on 2 bogies are simultaneously generated, and the probability that the short-circuit phenomena are completely the same is extremely low, so that after the local short-circuit faults of the eddy current braking devices on 1 bogie are generated, the exciting power supply detects that the resistance values of the eddy current braking devices on 2 bogies are deviated, 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, the eddy current braking device with the larger resistance value is judged to be in a normal working condition, and the eddy current braking device with the smaller resistance value is subjected to the local short-circuit fault.
Further, in an embodiment of the present invention, the 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 further includes:
when the determined resistance difference is not larger than the preset deviation threshold value, obtaining the reasonable resistance value of the preselected and determined eddy current brake device;
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 secondly, whether the eddy current braking device has local short circuit fault or not is diagnosed according to whether the resistance value of the eddy current braking device is reasonable or not.
The resistance value is influenced by the temperature of the electromagnet, in this embodiment, referring to the relevant technical standard of the high-speed motor train unit, the operating environment range of the eddy current braking device is-40 to 160 ℃, so that the theoretical resistance value when the excitation power supply detects the resistance value of the eddy current braking device is not lower than-40 ℃ under any condition.
And after the excitation power supply outputs current, calculating that the resistance value of the eddy current braking device is lower than the theoretical resistance value at the lowest environmental temperature and continues for a period of time, and judging that the eddy current braking device has a local short-circuit fault. Namely, the resistance value of the eddy current braking device is determined to be not in accordance with the reasonable resistance value and exceed the preset time, and then the eddy current braking device in the eddy current braking system is determined to have short circuit fault.
The two fault diagnosis modes can be used simultaneously, and the mode II is an important supplement of the mode I. The method comprises the steps of firstly, detecting the resistance difference of two bogies by a similarity method, accurately identifying the short circuit of one coil, and secondly, taking a bottom-guaranteeing measure when local short-circuit faults occur in eddy current braking devices on 2 bogies.
And after detecting that the local short-circuit fault occurs in the eddy current braking device, the excitation power supply immediately stops current output and sends fault information to the train control system.
In an embodiment of the present invention, an excitation power supply is shown in fig. 2, and in this embodiment, the excitation power supply is composed of two independent power supply modules, an input side of the excitation power supply is connected to a middle direct current link of a traction converter, and an output side of the excitation power supply is respectively connected to braking devices of two bogies. The excitation power supply gets electricity from the middle direct current link of the traction converter, and continuously adjustable current is output to the braking device after a series of conversion. In this embodiment, each braking device includes two sets of electromagnets, each set includes coil assemblies of the same number and the same electrical characteristics, and all the coil assemblies are connected in series and supplied with power by an excitation power supply in a unified manner.
In this embodiment, the method for diagnosing the local short-circuit fault of the eddy current braking device is shown in fig. 3, and includes the following specific steps:
firstly, two independent power modules in the excitation power supply 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 secondly, respectively calculating the resistance values of the eddy current braking devices on the 2 bogies by the excitation power supply according to the sampling values of the output voltage and the output current.
And step three, after the excitation power supply detects that the resistance value deviation of the eddy current braking devices on the 2 bogies is overlarge and lasts for a certain time, judging that the eddy current braking device with the larger resistance value is in a normal working condition, and judging that the eddy current braking device with the smaller resistance value has a local short circuit fault. And when the excitation power supply detects that the resistance value deviation of the eddy current braking devices on the 2 bogies is normal, performing the following step (iv).
And fourthly, judging that the eddy current braking device has a local short circuit fault after the resistance value of the eddy current braking device calculated by the excitation power supply is lower than the theoretical resistance value at the lowest environmental temperature and continues for a period of time.
Fifthly, when the excitation power supply detects the local short-circuit fault in the third step or the fourth step, the power supply of the eddy current braking device on 2 bogies is blocked at the same time, and the excitation power supply is shut down for protection;
sixthly, no fault occurs, and the excitation power supply operates normally.
And in the process of supplying power to the eddy current braking device by the excitation power supply, monitoring the state of the electromagnet in real time according to the steps. Wherein, the third step and the fourth step are the key steps of detecting and diagnosing the local short-circuit fault, wherein:
and thirdly, the local short-circuit fault of the eddy current braking device can be diagnosed more accurately at any temperature by adopting the local short-circuit fault diagnosis mode.
When a deviation is detected, if the eddy-current braking device 1 has a resistance R1Higher, eddy current brake 2 resistance R2If the device 1 is not defective and the device 2 is in a partial short-circuit fault, the difference in resistance Δ R between the two eddy-current braking devices is | R1-R2I 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/R1。
The higher the precision of the exciting power supply for calculating the number of the electromagnets between the short-circuit points is, the more accurate the diagnosis of the local short-circuit fault is, and the calculation precision is mainly related to the precision of exciting power supply current and voltage sensors and is unrelated to temperature.
If local short-circuit faults occur simultaneously in the eddy current braking device 1 and the eddy current braking device 2 and the number of short-circuit coils is the same under the extremely low possibility, the diagnosis precision of the step (III) is reduced, and even the faults cannot be diagnosed.
And fourthly, adopting the local short-circuit fault diagnosis mode, namely diagnosing whether the eddy current braking device has the local short-circuit fault according to whether the resistance value of the eddy current braking device is correct or not. The diagnosis accuracy of this step is not affected by the occurrence of a local short-circuit fault in both the eddy current brake device 1 and the eddy current brake device 2.
In the embodiment of the invention, the software of the excitation power supply presets the resistance value R of the eddy current brake device at the temperature of minus 40 DEG CLWhen detecting that the resistance value R of the device is less than R at a certain momentLAnd judging that the device has a local short-circuit fault.
Wherein, the resistance value of the eddy current brake device meets the requirement of the eddy current brake device 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 excitation power supply can diagnose a fault. And calculating to obtain:
when the temperature of the electromagnets is minus 40 ℃, the short-circuit fault that the proportion of the number of the electromagnets between the short-circuit points in the total number is greater than 0 can be identified;
when the temperature of the electromagnet is 160 ℃, the short-circuit fault that the proportion of the number of the electromagnets between the short-circuit points accounts for more than 50.7 percent of the total number can be identified.
Therefore, the accuracy of step (iv) is related to the excitation supply current and voltage sensor accuracy and temperature.
According to the diagnosis method for the electromagnet short circuit provided by the embodiment of the invention, when the local short circuit fault occurs to the electromagnet of the eddy current braking device, the excitation 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 of the eddy current braking system of the high-speed motor train unit, provided by the embodiment of the invention, 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 that the electromagnet is exposed in the environment outside the vehicle and is hit by foreign matters such as rainwater, ice, snow, broken stones and the like for a long time, so that the electrical protection of the electromagnet is possibly disabled. 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 a serious case, 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 excitation power supply can diagnose and protect the local short-circuit fault of the eddy current braking device, and the safety of the eddy current braking system and the safety of train operation are improved.
(2) The maintainability of the eddy current braking system is improved:
the eddy current braking electromagnet cannot eliminate the risk of local short circuit through daily maintenance. According to the method provided by the invention, the excitation power supply can diagnose the local short-circuit fault of the eddy current braking device, and the fault information can guide personnel to carry out special inspection and maintenance on the fault device, so that the damage to other equipment caused by long-term operation of the fault device is avoided.
(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 coil component or the electrical connecting piece with the fault is replaced, and the eddy current braking device can be normally used. The damage of the vehicle bogie or the burning loss of the eddy current brake electromagnet caused by the short circuit fault of the electromagnet is avoided, and larger economic loss is caused.
Meanwhile, the present invention also provides an eddy current braking system short circuit fault detection apparatus, as shown in fig. 4, the apparatus includes:
a current-voltage value obtaining module 401, configured to obtain a voltage value and a current value of an eddy current braking device in an eddy current braking system;
a resistance value determining module 402, configured to determine a resistance value of the eddy current braking device according to the voltage value and the current value;
and a fault detection module 403, configured to generate 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 this embodiment of the present invention, the fault detection module 403 includes:
the resistance value difference determining unit is used for determining the resistance value 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 a short-circuit fault when the determined resistance value difference is larger than a preset deviation threshold value.
In this embodiment of the present invention, the fault detection module 403 further includes:
the reasonable resistance value obtaining unit is used for obtaining the reasonable resistance value of the preselected and determined eddy current braking device when the determined resistance value difference is not larger than the 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 then determining that the eddy current braking device in the eddy current braking system has short-circuit fault.
For those skilled in the art, the implementation manner of the short-circuit fault detection device for the eddy current braking system provided by the present invention can be clearly understood through the description of the foregoing embodiments, and details are not repeated herein.
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, and the like, but the embodiment is not limited thereto. In this embodiment, the electronic device may refer to the embodiments of the method and the apparatus, and the contents thereof are incorporated herein, and the repeated descriptions are omitted.
Fig. 5 is a schematic block diagram of a system configuration of an electronic apparatus 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, this diagram is exemplary; other types of structures may also be used in addition to or in place of the structure to implement telecommunications or other functions.
In one embodiment, the eddy current braking system short fault detection function may be integrated into the central processor 100. 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 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
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 realized by the control of the central processing unit.
As shown in fig. 5, the electronic device 600 may further include: communication module 110, input unit 120, display 160, power supply 170. It is noted that the electronic device 600 does not necessarily include all of the components shown in fig. 5; furthermore, the electronic device 600 may also comprise components not shown in fig. 5, which may be referred to in the prior art.
As shown in fig. 5, the central processor 100, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device, the central processor 100 receiving input and controlling 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 processing unit 100 may execute the program stored in the memory 140 to realize information storage or processing, etc.
The input unit 120 provides input to the cpu 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 to display an object to be displayed, such as an image or a character. The display may be, for example, an LCD display, but is not limited thereto.
The memory 140 may be a solid state memory such as Read Only Memory (ROM), Random Access Memory (RAM), a SIM card, or the like. There may also be a memory that holds information even when power is off, can be selectively erased, and is provided with more data, an example of which is sometimes called an EPROM or the like. The memory 140 may also be some other type of device. Memory 140 includes buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application/function storage section 142, and the application/function storage section 142 is used to store application programs and function programs or a flow for executing the operation of the electronic device 600 by the central processing unit 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 portion 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 application, address book application, etc.).
The communication module 110 is a transmitter/receiver 110 that transmits and receives signals via an antenna 111. The 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, may be provided in the same electronic device.
Embodiments of the present invention also provide a computer-readable program, where when the program is executed in an electronic device, the program causes a computer to execute the eddy current braking system short-circuit fault detection method as described in the above embodiments in the electronic device.
Embodiments of the present invention also provide a storage medium storing a computer-readable program, where the computer-readable program causes a computer to execute the eddy current braking system short-circuit fault detection described in the above embodiments in an electronic device.
The preferred embodiments of the present invention have been 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 that 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.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A method for detecting a short-circuit fault in an eddy current braking system, the 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;
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.
2. An eddy current braking system short circuit fault detection method as claimed in claim 1, wherein the generating an eddy current braking system short circuit fault detection result based on the determined resistance value of the eddy current braking device comprises:
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 a short-circuit fault.
3. An eddy current braking system short circuit fault detection method as claimed in claim 2, wherein the generating an eddy current braking system short circuit fault detection result based on the determined resistance value of the eddy current braking device comprises:
when the determined resistance value difference is not larger than the preset deviation threshold value, obtaining the reasonable resistance value of the vortex brake device which is determined in a pre-selection mode;
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.
4. An eddy current braking system short circuit fault detection method as claimed in claim 3, wherein the pre-selected determined reasonable resistance value of the eddy current braking device comprises:
acquiring the working environment temperature of the eddy current braking device;
and determining the reasonable resistance value of the eddy current braking device according to the working environment temperature.
5. An eddy current braking system short circuit fault detection method as claimed in claim 1, wherein the obtaining of the voltage value and the current value 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.
6. An eddy current braking system short circuit fault detection device, characterized in that the device comprises:
the current-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.
7. An eddy current braking system short circuit fault detection device as claimed in claim 6, wherein the fault detection module comprises:
the resistance value difference determining unit is used for determining the resistance value 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 a short-circuit fault when the determined resistance value difference is larger than a preset deviation threshold value.
8. An eddy current braking system short circuit fault detection device as claimed in claim 7, wherein the fault detection module further comprises:
the reasonable resistance value obtaining unit is used for obtaining the reasonable resistance value of the preselected and determined eddy current braking device when the determined resistance value difference is not larger than the 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 then determining that the eddy current braking device in the eddy current braking system has short-circuit fault.
9. 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 5 when executing the computer program.
10. 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 5.
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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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106249144A (en) * 2016-08-16 2016-12-21 株洲中车时代电气股份有限公司 Double-fed wind power generator interturn short-circuit failure diagnosing method and fault monitoring method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106249144A (en) * 2016-08-16 2016-12-21 株洲中车时代电气股份有限公司 Double-fed wind power generator interturn short-circuit failure diagnosing method and fault monitoring method

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