EP4419406A1 - Kontrolleinrichtung für eine magnetschienenbremse - Google Patents
Kontrolleinrichtung für eine magnetschienenbremseInfo
- Publication number
- EP4419406A1 EP4419406A1 EP22821878.0A EP22821878A EP4419406A1 EP 4419406 A1 EP4419406 A1 EP 4419406A1 EP 22821878 A EP22821878 A EP 22821878A EP 4419406 A1 EP4419406 A1 EP 4419406A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic
- current
- measurement
- magnetic field
- rail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
-
- 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
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H7/00—Brakes with braking members co-operating with the track
- B61H7/02—Scotch-blocks, skids, or like track-engaging shoes
- B61H7/04—Scotch-blocks, skids, or like track-engaging shoes attached to railway vehicles
- B61H7/06—Skids
- B61H7/08—Skids electromagnetically operated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/008—Brakes acting on a linearly moving member
Definitions
- the invention relates to a control device and a method for monitoring the function of a magnetic rail brake.
- Magnetic rail brakes are well known in the field of railway technology.
- a magnetic track brake has at least one magnetic field generating device for generating a magnetic field.
- the magnetic rail brake rests on a trackside rail and generates a braking effect through friction; by feeding in a current through the magnetic field generating device, a magnetic attraction force can be generated between the magnetic rail brake and the rail, as a result of which the friction and thus the braking force are increased.
- the magnetic rail brake is raised and separated from the rail.
- the invention is based on the object of specifying a control device for a magnetic track brake, with which at least one measurement data relating to the magnetic track brake can be formed.
- control device comprises: an alternating source for generating an alternating current through the magnetic field generating device or at least an alternating current component in a current flowing through the magnetic field generating device and for generating an alternating magnetic field and an evaluation device for this purpose is designed, on the basis of measurement results, the AC behavior of the magnetic field generation unit describe the direction of forming at least one measurement data relating to the magnetic track brake.
- An essential advantage of the control device according to the invention can be seen in the fact that it works on the basis of measurement results that describe the AC behavior of the magnetic field generating device.
- the idea according to the invention is that the essential function of the magnetic track brake is based on the magnetic flux that is generated by the magnetic field generating device when current is flowing through it.
- the magnetic flux is in turn influenced by several factors, for example the distance between the magnetic rail brake and the rail. If the magnetic rail brake is on the rail, the magnetic flux is at its maximum due to the magnetic influence of the iron of the rail, whereas the magnetic flux is comparatively small when the magnetic rail brake is raised.
- the influence of the distance has an effect on the electrical properties, for example the inductance, of the magnetic rail brake or its magnetic field generating device, which makes it possible, for example, by evaluating the AC behavior of the magnetic field generating device to determine the position of the Magnetic rail brake to close relative to the rail.
- other effects can also be identified by evaluating the AC behavior of the magnetic field generating device, as will be explained in detail further below, for example wear or soiling of the magnetic track brake.
- the magnetic field generating device of the magnetic track brake preferably comprises one or more coils or is formed by one or more coils.
- the control device preferably includes a voltage measuring device for measuring a voltage applied to the magnetic rail brake, the magnetic field generating device or the alternating source, and a current measuring device for measuring sen of the current flowing through the magnetic field generating device.
- the evaluation device is preferably designed to form the at least one measurement information relating to the magnetic rail brake on the basis of measurement results that are supplied by the voltage measurement device and the current measurement device.
- the evaluation device is designed such that it generates a contact signal indicating that the magnetic rail brake is in contact with the rail, depending on whether the at least one measurement data satisfies a contact condition.
- the at least one measurement item or one of the measurement items in the case of two or more measurement items is preferably a phase shift-related measurement item and the seating condition is preferably a phase shift-related seating condition.
- the evaluation device is preferably designed in such a way that it determines a measured phase value indicating the phase shift between a current measured by the current measuring device and a voltage measured by the voltage measuring device, with the measured phase value forming the phase-shift-related measurement information and the phase-shift-related measurement information Seating condition as fulfilled when the measured phase value reaches or exceeds a predetermined phase position threshold value.
- the evaluation device is preferably designed in such a way that it forms an impedance indicator that indicates an impedance of the magnetic field generating device, with the amount of the impedance pointer forms the measurement information related to the absolute value of the impedance, and the seating condition related to the absolute value of the impedance is considered to be met if the amount of the impedance indicator reaches or exceeds a predetermined impedance absolute value threshold value.
- the at least one measurement or one of the measurements in the case of two or more measurements is a pointer angle-related measurement and the seated condition is a pointer angle-related seated condition.
- the evaluation device is preferably designed in such a way that it forms an impedance vector describing an impedance of the magnetic field generating device, with the phase angle of the impedance vector forming the measurement information related to the vector angle, and considering the seated condition related to the vector angle to be fulfilled when the phase angle of the impedance vector reaches or exceeds a predetermined angle threshold value.
- the at least one measurement or one of the measurements in the case of two or more measurements is a quotient-related measurement and the seating condition is a quotient-related seating condition and the measurement results of the voltage measuring device and the current measuring device are effective or peak values of the current or the voltage.
- the evaluation device is preferably designed in such a way that it forms the quotient between the rms or peak value of the voltage and the rms or peak value of the current as the quotient-related measurement information and considers the quotient-related seating condition to be fulfilled if the latter ratio meets or exceeds a predetermined resistance threshold, and/or the ratio-related measurement is the quotient between the rms or peak value of the current and the rms or peak value of the voltage and considers the ratio-related seating condition to be met if the latter quotient reaches or falls below a predetermined conductance threshold value.
- the evaluation device is designed in such a way that it forms a measured phase value indicating the phase shift between current and voltage on the basis of measurement results supplied by the voltage measuring device and the current measuring device, and generates the signal er - indicates when the phase measurement value meets or exceeds a predetermined phase shift threshold value.
- the evaluation device is designed in such a way that it forms an impedance vector describing an impedance of the magnetic field generating device on the basis of measurement results supplied by the voltage measuring device and the current measuring device and generates the signal , if the magnitude of the impedance vector reaches or exceeds a predetermined impedance magnitude threshold value and/or the phase angle of the impedance vector reaches or exceeds a predetermined angle threshold value.
- the measurement results of the voltage measuring device and the current measuring device indicate effective or peak values of the current or voltage and the evaluation device is designed in such a way that it generates the signal when a the quotient between the rms or peak value of the voltage and the rms or peak value of the current reaches or exceeds a predetermined resistance threshold value, and/or a quotient between the rms or peak value of the current that forms at least one measurement and the rms or peak value of the voltage reaches or falls below a specified conductance threshold value.
- the evaluation device includes a Fourier transformation device and is designed in such a way that it subjects the time profile of current and voltage measurement values of the voltage measurement device and the current measurement device to a Fourier transformation to form a spectrum and converts the signal into Dependence on the spectrum generated.
- the alternating source can be or have an alternating current source or alternating voltage source, which feeds an alternating current into the magnetic field generating device.
- the alternating source is or has a modulation device that modulates the amplitude of the current flowing through the magnetic field generating device over time, forming the alternating current component.
- the alternating source can therefore be a passive component which itself does not supply any current or voltage, but only a current or a voltage of another component, such as a direct current source or a direct voltage source, modulated over time. lated to create an alternating magnetic flux.
- the alternating current or alternating current component can be purely sinusoidal over time, i.e. only have a single frequency. Alternatively, it can be provided that the alternating current or alternating current component has two or more frequencies in the frequency spectrum.
- the frequency or at least one of the frequencies of the alternating current or the alternating current component is in the frequency range between 10 and 40 Hz.
- the evaluation device is designed in such a way that it generates a splintering signal which indicates that at the interface to the rail on the Magnetic track brake deposits are generated, depending on whether the at least one measurement specification fulfills a scalding condition.
- the evaluation device is designed in such a way that it generates a wear signal, which indicates the state of wear of pole shoes and end members of the magnetic track brake, depending on whether the at least one measurement data satisfies a wear condition.
- the evaluation device is designed in such a way that it generates a fault warning signal, which indicates that the function of the magnetic rail brake is faulty, if - although there is a lowering signal indicating that the magnetic rail brake should be resting on the rail - the at least a measurement indicates the fulfillment of a specified fault condition.
- the fault condition can be regarded as fulfilled, for example, if the magnetic flux of the alternating magnetic field falls below a minimum flux value and/or there is no stall signal.
- the evaluation device is designed in such a way that it generates a high-level signal when the at least one measurement data or one of the measurement data satisfies a high-level condition. For example, it can generate the high-level signal if the measurement data or the measurement data do not enable the generation of the contact signal or the warning signal or the AC behavior of the magnetic field generation device indicates a magnetic flux below a minimum flux threshold and/or an inductance below a minimum inductance.
- the measurement data and signals based on them can be generated solely on the basis of stored comparative values that were measured and stored in the initial state after the magnetic rail brake was first installed or after maintenance.
- measurement results that show the alternating current describe the behavior of the magnetic field generating device (such as the measured phase value), measured and stored in each case for the up position and the support position (down position).
- a corresponding measurement data and a corresponding signal i.e. a contact signal or a rest signal, can be generated and be issued.
- the invention also relates to a method for monitoring the function of a magnetic rail brake, which comprises at least one magnetic field generating device for generating a magnetic field, the magnetic rail brake being designed in such a way that it is lowered in active, trouble-free braking operation and on a trackside rests on the rail and when inactive is raised and separated from the rail.
- a current in the form of an alternating current or at least a current with an alternating current component is fed into the magnetic field generating device to generate an alternating magnetic field and, on the basis of measurement results that describe the alternating current behavior of the magnetic field generating device, at least one relating to the magnetic track brake measurement is formed.
- the method is preferably carried out using the control device described above.
- the advantages and advantageous configurations of the method according to the invention reference is made to the above statements in connection with the control device according to the invention and its advantageous configurations.
- FIG. 1 shows, in a simplified representation, components of a magnetic track brake that is placed on a rail of a railway track system and is controlled by a control device that is equipped with an exemplary embodiment of a control device according to the invention
- FIG. 2 shows the control device according to FIG. 1 in more detail
- FIG. 3 shows the time course of an alternating current applied to the magnetic rail brake according to FIG. 1 and an alternating current flowing through the magnetic rail brake according to FIG. 1 in the lowered position of the magnetic rail brake shown in FIG
- FIG. 4 shows the time course of the alternating voltage and the alternating current in the case that the magnetic rail brake is in its upper position and is spatially separated from the rail.
- FIG. 1 shows an exemplary embodiment of a magnetic rail brake 10 of a rail vehicle, not shown in any more detail, which rests on a rail 20 of a trackside railway track system and when the rail vehicle is moving vehicle can generate a braking effect due to friction.
- the magnetic rail brake 10 can be raised with a lifting device, not shown in FIG. 1 for reasons of clarity, or brought into an elevated position in which it is spatially separated from the rail 20; it can also be lowered onto the rail 20 with the lifting device or brought into a lower support position, as is shown schematically by way of example in FIG.
- the magnetic track brake 10 includes, among other things, a magnetic field generating device and a magnetizable core 11, the ends of which can be formed, for example, by two pole shoes 11a and 11b.
- the magnetic field generating device which generates a magnetic field during active operation, can have one or more coils or be formed by one or more such coils; in the exemplary embodiment according to FIG. 1, the magnetic field generating device comprises only a single coil 12 for reasons of illustration.
- the structural and electrical configuration of the magnetic track brake 10 is to be understood here only as an example; Magnetic rail brakes 10 as such are generally known in railway technology, which is why a detailed description of the structural design of the magnetic rail brake 10 is not required to understand the present invention.
- the magnetic rail brake 10 is in its active state, in which it rests on the rail 20 and a direct current Ig flows through it in order to generate a desired braking effect.
- the direct current Ig flows through the coil 12 which—excited by the direct current Ig—causes a constant magnetic field and a magnetic flux Bg through the coil 12, the pole shoes 11a and 11b and the external trackside rail 20.
- the coil 12, the pole shoes 11a and 11b and the trackside rail 20 form a closed magnetic circuit in the lowered state of the magnetic rail brake 10 according to FIG.
- the magnetic flux Bg in the magnetic circuit leads to a magnetic attraction between the pole shoes 11a and 11b and the trackside rail 20, whereby the magnetic rail brake 10 is pressed onto the rail 20 and the friction-related braking effect of the magnetic rail brake 10 is increased.
- the direct current Ig through the magnetic track brake 10 can thus also be referred to as the braking current of the magnetic track brake 10 .
- a control device 30 is used in the exemplary embodiment according to FIG. an exemplary embodiment of the control device 30 according to FIG. 1 is shown in FIG. 2, to which reference is made below.
- the activation and deactivation of the active braking operation of the magnetic rail brake 10, ie the switching on and off of the direct current Ig, can take place, for example, by a switch 31 and the switch 31 activating device 32 of a control device 30.
- Activation device 32 can be connected to a vehicle control unit (not shown in the figures), in particular a vehicle brake control unit, and can be controlled by it or be integrated into such as a component, for example in the form of a software module.
- a direct current or direct voltage source 33 can be present, which—as shown in FIG. 2 by way of example—can form a component part of the control device 30 .
- the direct current Ig can be provided by an external direct current network.
- the control device 30 according to FIG. 1 is additionally equipped with a control device 34 which causes an alternating magnetic flux Bw in the magnetic track brake 10 and thus in the magnetic circuit according to FIG.
- the control device 34 has an electrical See AC power source 341, which may be an AC electrical power source 341, as shown in FIG. 2, or an AC electrical power source.
- the electrical alternating voltage source 341 feeds an alternating current Iw into the coil 12 . It is assumed below, for example, that the AC voltage source 341 generates alternating current or AC voltage with a single frequency, which is preferably in the range between 10 and 40 Hz.
- the control device 34 also includes an evaluation device 342, the task of which is to generate one or more measurement data MA that directly or indirectly describe the state of the magnetic rail brake 10 or its position.
- the measurement data MA or at least one of them is preferably dependent on the alternating magnetic field that is produced by the alternating voltage source 341 .
- the evaluation device 342 can be connected to a vehicle-side control unit (not shown in the figures), in particular a vehicle-side brake control unit, or can be integrated into such as a component, for example in the form of a software module.
- the evaluation device 342 is connected to a voltage measuring device 343, which measures the AC voltage Uw at the AC voltage source 341, forming measured voltage values Uwm.
- the voltage measuring device 343 can also be connected in parallel to the coil 12 and measure the coil voltage Us at the coil 12; the alternating component of the coil voltage Us corresponds to the alternating voltage Uw at the alternating voltage source 341.
- the inductance L is minimal because of the missing or only very small influence of the iron of the rail 20, so that the amount
- FIG. bar is seated on the rail 20, as shown in FIG. 1, and the rail 20 forms a closed magnetic circuit with the magnetic rail brake. It can be seen that the alternating current Iw and the alternating voltage Uw are clearly phase-shifted; a phase measurement value describing the phase position or the phase shift is marked with the reference symbol V.
- FIG. 4 shows, by way of example, the time profile of the AC voltage Uw and the time profile of the alternating current Iw over time t in the event that the magnetic rail brake is separated from the rail 20.
- the alternating current Iw and the alternating voltage Uw are less phase-shifted than in FIG. 3; the measured phase value V is therefore smaller than in FIG. 3.
- the effective value leff of the alternating current Iw or its peak value Imax is greater than when the magnetic rail brake 10 is fitted or greater than in FIG. 3, since the magnitude of the impedance IZ
- the direction of the changes is to be understood as an example. Due to different resonance and measurement frequencies or in the case of more complex electrical conditions, it can happen that the changes between active and inactive operation of the magnetic rail brake or changes in the position of the magnetic rail brake lead to an opposite direction of change.
- the evaluation device 342 can generate one or more measurement data MA relating to the magnetic rail brake. They can also generate various signals on their basis, for example a contact signal Sa, which is in the contact position magnetic track brake 10 on the rail 20, a fault signal Sst, which indicates a fault, a skewing signal, which indicates skewing on the magnetic track brake 10, and/or a wear signal, which indicates the state of wear of the pole shoes 11a and 11b ; this is explained below using examples:
- the measured phase value V as such can form one of the measurement data MA, for example, and the evaluation device 342 can generate a contact signal Sa, for example, which indicates the contact position of the magnetic rail brake 10 or its contact with the rail 20 when the measured phase value V reaches a predetermined phase shift threshold value Vsoll or exceeds, so the following applies:
- the phase shift threshold value Vsoll is preferably of the order of 5° and can be 5°, for example.
- the phase shift threshold value can also be defined as a function of a high-position reference phase value Vref, which has been measured and stored in the high-position of the magnetic track brake 10;
- the evaluation device 342 can always select the phase shift threshold value Vsoll to be greater than the high-level reference phase value Vref by a predefined differential phase value Vdiff of, for example, 3°, for example according to:
- Vset Vref + Vdiff
- the phase difference dV between the current measured phase value V and the high reference phase value Vref can be used to form the contact signal Sa;
- the change threshold value dVsoll is preferably 3° or more.
- the warning signal W is generated, for example.
- the impedance Z can form one of the measurement data MA and the evaluation device 342 can generate the signal Sa when the amount
- the specified impedance absolute threshold value SW1 if, for example, the following applies:
- the warning signal W is preferably generated.
- the evaluation device 342 can generate the signal Sa when the phase angle arg(Z) of the impedance Z reaches or exceeds a predetermined angle threshold value, ie: arg(Z)>SW2
- phase angle arg(Z) of the impedance Z corresponds—apart from any conversion or detection deviations—to the phase measurement value V above, so that the angle threshold value can correspond to the phase shift threshold value Vsoll.
- the warning signal W is preferably generated if, for example, the following applies:
- the peak values Umax and Imax or quotients formed from them can form measurement data MA and the evaluation device 342 can generate the presence signal Sa, for example, if the quotient between the peak value Umax of the AC voltage and the peak value Imax of the current reaches or exceeds a predetermined resistance threshold value SW3. if for example:
- the warning signal W is preferably generated, ie if, for example, the following applies:
- the quotient between the peak value Imax of the alternating current and the peak value Umax of the voltage can be formed and compared with a predetermined conductance threshold value in order to generate the deadlock signal Sa or the warning signal W.
- the rms values or quotients formed from them can form measurement data MA and the evaluation device 342 can generate the presence signal Sa if the quotient between the rms value Ueff of the voltage and the rms value of the current reaches or exceeds the specified resistance threshold value SW3 , if, for example, the following applies:
- the warning signal W is preferably generated, ie if, for example, the following applies:
- the quotient between the rms value leff of the alternating current and the rms value Ueff of the voltage can be formed and compared with the specified conductance threshold value in order to generate the service signal Sa or the warning signal W.
- evaluation device 342 is connected to a position sensor which detects the high position of the magnetic track brake 10 and Can generate position indicating high position signal HLS.
- evaluation device 342 can check whether the measurement data MA, for example the above-mentioned measured phase value V, deviates from a high position setpoint value stored for the high position beyond a predetermined high position tolerance measure or not. If the tolerance band defined by the high position tolerance measure is not left, the evaluation device 342 can emit a signal which indicates that the magnetic track brake 10 is operating within the normal range; if the tolerance band is left, a maintenance signal Sw is preferably output, which indicates that the magnetic track brake 10 is to be serviced.
- the high position setpoint is defined, for example, by recording the measurement MA, for example the measured phase value V, after the initial installation and/or after each maintenance has been carried out, and storing the measurement MA, for example the measured phase value, as the high position setpoint .
- the evaluation device 342 generates a cleavage signal Si when the measured phase value V falls below the high position setpoint minus the high position tolerance measure, and/or generates a wear signal Sv if the phase measured value V exceeds the high position setpoint plus the high position tolerance measure - tet.
- the evaluation device 342 can generate a fault warning signal Sst if - for example from the position sensor already mentioned - there is a lowering signal ABS, according to which the magnetic rail brake 10 should be in the lowered state, i.e. on the rail 20, but neither that Aufliegesignal Sa nor the warning signal W is present.
- a fault warning signal Sst can signal that the magnetic rail brake 10 despite the presence of the lowering nals ABS probably either not sitting on the rail 20 or the control device 34 is disturbed.
- the evaluation device 342 can generate its own high-level signal SH, for example if the measurement information MA explained above does not enable the generation of the contact signal Sa or the warning signal W, or if the AC behavior of the magnetic field generating device causes a magnetic flux below a minimum flux threshold indicates.
- the alternating source (here the alternating voltage source 341) generates a single alternating frequency; alternatively, the alternating source can also generate more than one frequency, for example a frequency spectrum in which at least one of the frequencies is preferably in the range between 10 and 40 Hz.
- the above steps for generating the measurement data MA and the signals, such as the contact signal Sa, the warning signal W, the foliation signal Si, the maintenance signal Sw, the wear signal Sv and the fault warning signal Sst, are preferably carried out for at least two or more frequencies in the case of two or more frequencies one of the frequencies, particularly preferably for each of the frequencies.
- an analysis of the measurement signals can include a Fourier transformation, for example, in order to enable frequency-specific signal evaluation in a simple and rapid manner.
- FIGS. 1 to 4 are only to be understood as examples; they are primarily intended for general understanding. In concrete terms, it should only be explained by way of example how measurement data MA relating to the magnetic rail brake 10 can be formed on the basis of measurement results which describe the AC behavior of the magnetic field generation device. In this sense, the physical model used above, according to which the magnetic track brake 10 according to FIG. least can be described approximately by a series connection of an ohmic resistor R and an inductance L according to
- the measurement information MA and signals based thereon can be generated solely on the basis of stored comparison values that were measured and stored in the initial state after the magnetic track brake 10 was first installed or after maintenance.
- measurement results that describe the AC behavior of the magnetic field generating device such as the measured phase value V
- the stored measurement results can be measured and stored for the upper position and the rest position (lower position).
- it can be determined, for example, whether the magnetic track brake 10 is in the up position or the contact position, and a corresponding measurement data MA and a corresponding contact signal Sa or contact signal SH can be generated .
- the other measurement data MA explained above and the other signals described above, such as the warning signal W, the cleavage signal Si, the maintenance signal Sw, the wear signal Sv and the fault warning signal Sst are formed; the above statements apply accordingly in this regard.
- the AC behavior of the magnetic field generating device can be detected during normal operation of the magnetic track brake, ie for example when direct current is switched on, or in the switched-off state, ie for example when direct current is switched off, in order to generate the measurement data and signals described above.
- a measuring voltage can be applied to the magnet coil(s) and AC variables can be measured. Measuring the AC characteristics can provide information about the position and condition of the magnetic rail brake.
- the magnetic rail brake can have two brake magnets or consist of such.
- Each brake magnet can be viewed as an inductor with an iron core and a gap. Therefore, the condition of the magnet can be assessed using classic AC measurement technology. Any change in the state of the iron core leads to changes in the response behavior to an alternating current load and can therefore be detected very precisely.
- the state of a new brake magnet in the up position can be used as a reference point. If the brake now touches down, the air gap is closed and the AC behavior of the brake changes significantly.
- a measurement of the AC properties can be carried out ideally before starting the journey with the vehicle stationary. The best results can be expected here, since vibrations and other disturbing influences are minimal.
- the conventional switching technology can be replaced by a quasi-analogue output stage, which modulates the measuring current.
- a technical improvement can lie in transferring the AC current measurements to the frequency domain using Fourier transformation. This simplifies the measurement of some AC characteristics.
- the procedure described can supplement the diagnosis for high-level detection with the information as to whether the magnetic rail brake has also been lowered to the top edge of the rail.
- the method can offer the possibility of detecting sloughing and thus provide information on the braking force of the magnetic track brake.
- the method can provide an indication of the wear condition of the pole pieces and end members, at least the New and Worn condition.
- the method can offer the possibility of carrying out the diagnosis dynamically, ie also while driving or braking.
- the diagnosis for detection of bottoming as well as for detection of splintering and wear can be carried out without additional sensors.
- the measuring technology typically used can enable the internal resistance of the brake to be measured without any further effort and can therefore be used to detect faults on the electrical side. If measurement technology is used that can also measure when it is switched on, further switching and suppression elements for the magnetic rail brakes can be omitted.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021213119.0A DE102021213119A1 (de) | 2021-11-22 | 2021-11-22 | Kontrolleinrichtung für eine Magnetschienenbremse |
| PCT/EP2022/082586 WO2023089166A1 (de) | 2021-11-22 | 2022-11-21 | Kontrolleinrichtung für eine magnetschienenbremse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4419406A1 true EP4419406A1 (de) | 2024-08-28 |
Family
ID=84487759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22821878.0A Pending EP4419406A1 (de) | 2021-11-22 | 2022-11-21 | Kontrolleinrichtung für eine magnetschienenbremse |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4419406A1 (de) |
| DE (1) | DE102021213119A1 (de) |
| WO (1) | WO2023089166A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3445061A1 (de) | 1984-12-11 | 1986-06-12 | Knorr-Bremse AG, 8000 München | Magnetschienenbremse fuer schienenfahrzeuge |
| DE29505955U1 (de) | 1995-04-06 | 1996-08-01 | Hanning & Kahl GmbH & Co., 33813 Oerlinghausen | Magnetschienenbremse mit Entmagnetisierungseinrichtung |
| DE102008029312B3 (de) * | 2008-06-20 | 2009-12-24 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Verfahren zur Wirküberwachung von Schienenbremsen |
| DE102008059882B4 (de) * | 2008-12-01 | 2010-07-15 | Schaltbau Gmbh | Vorrichtung und Verfahren zur Überwachung einer Magnetbremse an Schienenfahrzeugen |
| DE102010024686A1 (de) | 2010-06-23 | 2011-12-29 | Schaltbau Gmbh | Verfahren zur Überwachung einer Magnetschienenbremse an Schienenfahrzeugen |
| CN106394598A (zh) | 2016-12-05 | 2017-02-15 | 中车株洲电力机车有限公司 | 一种轨道交通车辆磁轨制动装置及其控制方法 |
| CN110091889B (zh) | 2018-01-29 | 2020-08-04 | 中车唐山机车车辆有限公司 | 一种磁轨制动控制系统、方法及磁悬浮列车 |
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2021
- 2021-11-22 DE DE102021213119.0A patent/DE102021213119A1/de active Pending
-
2022
- 2022-11-21 EP EP22821878.0A patent/EP4419406A1/de active Pending
- 2022-11-21 WO PCT/EP2022/082586 patent/WO2023089166A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023089166A1 (de) | 2023-05-25 |
| DE102021213119A1 (de) | 2023-05-25 |
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