EP4540090A1 - Stromabnehmer mit bruchüberwachung - Google Patents
Stromabnehmer mit bruchüberwachungInfo
- Publication number
- EP4540090A1 EP4540090A1 EP23768178.8A EP23768178A EP4540090A1 EP 4540090 A1 EP4540090 A1 EP 4540090A1 EP 23768178 A EP23768178 A EP 23768178A EP 4540090 A1 EP4540090 A1 EP 4540090A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- test pressure
- compressed air
- actual
- current collector
- 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
- 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
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/22—Supporting means for the contact bow
- B60L5/24—Pantographs
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
-
- 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
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/20—Details of contact bow
- B60L5/205—Details of contact bow with carbon contact members
-
- 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
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/22—Supporting means for the contact bow
- B60L5/28—Devices for lifting and resetting the collector
- B60L5/32—Devices for lifting and resetting the collector using fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/30—Trolleys
-
- 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
- B60L2250/00—Driver interactions
- B60L2250/10—Driver interactions by alarm
Definitions
- the invention relates to a current collector according to the preamble of patent claim 1.
- Such a current collector is designed and provided for an electrically or hybrid-electrically powered vehicle for feeding in electrical energy from an overhead line system having at least one contact wire. It comprises at least one contact strip for electrically contacting the at least one contact wire, which has a contact piece carried by a contact piece holder.
- the current collector also comprises a compressed air channel that is at least partially delimited by the contact piece and a compressed air supply connected to the compressed air channel for feeding in compressed air. It also comprises a test pressure sensor for measuring an actual test pressure prevailing in the compressed air channel.
- Such a current collector is known from the publication DE 39 14 675 A1, which discloses a contact strip with a break detector device.
- the contact strip has a gas-tight channel, which is connected to a device for generating an increased air or gas pressure in the channel and to a detector that signals a drop in pressure. If the contact strip breaks or becomes excessively worn, the channel becomes leaky and the break or wear is indicated by the drop in pressure.
- the supports on the overrun horns provided according to the invention are also included in this break monitoring. These also have a corresponding channel, which is connected to the channel of the carbon strip via an inserted piece of hose.
- the connection to the gas supply and the monitoring device can be made via a connection nipple in the area of one of the overrun horns.
- the supports of the overrun Horns can also be manufactured in one piece with the grinding strip.
- a non-rail-bound, electrically or hybrid-electrically driven vehicle with a pantograph for feeding in electrical traction energy from an overhead line system is known.
- the pantograph has a contact strip arrangement that can be raised and lowered and which can be brought into contact with a contact wire of the overhead line system that runs over a lane.
- the contact strip arrangement has laterally projecting insulation horns with a predetermined breaking point.
- the contact strip arrangement also has a detection device which is designed to detect the breakage of an insulation horn and to trigger an automatic lowering of the contact strip arrangement.
- the air duct of the automatic emergency lowering can be connected to the emergency lowering up to the predetermined breaking point and the emergency lowering can thus be initiated via the safety relay.
- the known monitoring devices are based on detecting a pressure drop in the pressure channel as an indication of a major leak in the form of a break in the grinding piece or in the form of a broken running horn.
- the monitoring device can also incorrectly evaluate a drop in feed pressure from the compressed air supply as a detection event.
- the invention is therefore based on the object of providing a current collector of the type mentioned at the beginning, the breakage monitoring of which generates fewer false error messages.
- the pantograph is for an electric or hybrid-electric vehicle, such as a road vehicle. vehicle or a rail vehicle, designed, for example, as a pantograph. It is used to feed in electrical energy from a single-pole or two-pole overhead line system, which has a contact wire for rail vehicles and two contact wires designed as forward and return conductors for road vehicles.
- the current collector includes at least one contact strip for each contact pole for electrically contacting the respective contact wire, but can also include two contact strips arranged one behind the other in the direction of travel per contact pole.
- Each grinding strip has a grinding piece carried by a grinding piece holder, which is preferably made of carbon.
- the one or more contact strips of a contact pole can each be stored on a rocker arrangement, which can be carried by a pantograph-like adjustable support frame.
- the current collector comprises a compressed air channel at least partially delimited by the grinding piece, to which a compressed air supply for feeding in compressed air is connected.
- the compressed air channel extends from the compressed air supply into each of the at least one grinding strip and is at least partially delimited there by the respective grinding piece.
- the current collector also includes a test pressure sensor for measuring an actual test pressure prevailing in the compressed air duct.
- the current collector comprises a pneumatic throttle arranged in the compressed air duct between the compressed air supply and the grinding piece, the test pressure sensor cyclically measuring an actual test pressure prevailing in the compressed air duct downstream of the throttle. It also includes a feed pressure sensor for cyclically measuring an actual feed pressure prevailing in the compressed air channel upstream of the throttle. Furthermore, the current collector comprises an evaluation device which is designed to determine a target test pressure prevailing in the compressed air duct downstream of the throttle as a function of the measured actual feed pressure from the difference between a supply air mass flow flowing in through the throttle and one through a downstream in the pressure duct to cyclically calculate any leak present in the throttle in the exhaust air mass flow flowing out into the surroundings. The evaluation device is further designed to cyclically determine a test pressure deviation of the actual test pressure from the target test pressure, and to generate an error message if a first threshold value is exceeded by the determined test pressure deviation.
- cyclic should mean continuously at discrete, fixed time intervals, for example every 5 ms.
- the time intervals can also be given by a clock of a control device of the current collector, which controls the compressed air supply and a lifting device for raising and lowering the at least one contact strip.
- the evaluation device includes known means for electronic data processing, such as a computer unit and data memory with stored calculation algorithms for calculating the target test pressure in the test volume, i.e. the volume of the compressed air channel downstream of the throttle.
- the difference between the supply air mass flow flowing in through the throttle and the exhaust air mass flow flowing out through a leak is used as a key variable in the calculation of the target test pressure.
- the supply air mass flow is determined by the current actual feed pressure upstream of the throttle, by a passage cross-section of the throttle and by the actual test pressure prevailing in the test volume.
- the exhaust air mass flow is determined by the actual test pressure in the test volume, by the size of the leak in the test volume and by the ambient air pressure prevailing in the area.
- a flow model of the throttle and the leak is used, in which a distinction is made between subcritical and supercritical flow depending on the pressure conditions upstream and downstream of the throttle or the leak. Even with an intact grinding piece, a small leak can occur due to a leak in a practical implementation of the compressed air channel. nals can be assumed. From the size of the test pressure deviation, the evaluation unit recognizes a crack or break in the grinding piece with a gap width that is equivalent to a passage cross-section of, for example, 2 mm. Since the flow model continually calculates the behavior of the target test pressure in the test volume as a function of the measured actual feed pressure upstream of the throttle, the determined test pressure deviation is insensitive to pressure fluctuations in the feed pressure.
- Such pressure fluctuations occur, for example, when other consumers, such as a pneumatic lifting device on the pantograph, are connected to the compressed air supply.
- pressure drops in the pressure channel which are due to a reduction in feed pressure on the part of the compressed air supply or to temperature fluctuations, can be avoided that pressure drops in the pressure channel, which are due to a reduction in feed pressure on the part of the compressed air supply or to temperature fluctuations, are no longer incorrectly interpreted as break detections in the grinding piece. This reduces the number of false error messages.
- the evaluation device is designed to cyclically calculate an actual rate of change of the actual test pressure from successive measurements of the actual test pressure, and one from successive calculations of the target test pressure To calculate the target rate of change of the calculated target test pressure, to determine a change rate deviation of the actual rate of change from the target rate of change, and to generate an error message if a second threshold value is exceeded by the determined rate of change deviation.
- the respective rate of change indicates how quickly the target test pressure or the actual test pressure changes, which mathematically corresponds to the first derivative of the test pressure with respect to time.
- the evaluation device is designed to calculate the supply air mass flow from the measured actual feed pressure, the measured actual test pressure and a flow coefficient of the throttle, and to calculate the exhaust air mass flow from the measured actual test pressure, an ambient air pressure and a flow coefficient of the leak.
- determination equations for the mass flow with different approximation assumptions to simplify the equations are known, for example from https : / /de . wikipedia . org/wiki/Düsenströmung .
- a concrete simplified form is, for example, given by the equations
- PI inlet pressure upstream of the nozzle in bar
- P2 counter pressure downstream of the nozzle in bar
- KV flow coefficient in kg/h
- pN density in kg/m 3
- T temperature in K 297 K can be used for the temperature and 1.2 kg/m 3 for the density.
- the flow coefficients K v for throttle and leak are determined empirically for a current collector model and are then unchangeable.
- the actual feed pressure is used as the inlet pressure for the throttle and the actual test pressure is used as the counterpressure
- the actual test pressure is used as the inlet pressure for the leak and the ambient air pressure is used as the counterpressure.
- the current collector according to the invention further comprises a pneumatic lifting device for raising and lowering the at least one contact strip and a control device connected to the evaluation device for controlling the lifting device.
- the evaluation device is designed to transmit a generated error message to the control device and, when an error message is transmitted, to trigger a lowering of the at least one contact strip and/or to generate a driver message.
- the lifting device can have a pantograph-like frame that supports the contact strips and can be raised using an air bellows. The air bellows can be supplied with compressed air from the compressed air supply.
- the lifting device is electrically controlled by means of the control device of the current collector in order to put it into or out of operation and to trigger a raising or lowering of the contact strips.
- the control device can block the raising of the contact strips or lower the contact strips that are in contact with the contact wire in order to prevent defective pantographs with a cracked or broken contact piece from contacting the contact wire.
- the evaluation device is designed to detect an exceedance of the first threshold value by the test pressure deviation and/or the second threshold value by to recognize the change rate deviation as a blockage in the pressure channel and to generate a corresponding error message.
- Such blockages in the pressure channel can be caused by production or assembly errors and would prevent a correct determination of a test pressure deviation and/or a change rate deviation and thus an error detection "compressed air is escaping through a break or crack, for example in the grinding piece".
- Such a blockage reduces the test volume in the pressure channel, which is why the measured actual test pressure increases faster than the calculated target test pressure. This applies even more to the rate of change of the test pressure.
- the evaluation device can thus quickly issue an existing failure disclosure - for example when the feed pressure is increased to the nominal feed pressure - and use an error message to prompt the control device to prevent the grinding bars from being raised.
- This can detect an error, such as a blockage in the pressure channel, which prevents the actual purpose, such as the detection of a crack in or breakage of the grinding piece, from being fulfilled.
- the evaluation device is designed to recognize an exceedance of the first threshold value by the test pressure deviation and/or the second threshold value by the change rate deviation as a crack or break in the contact piece after the nominal feed pressure has been reached and to generate a corresponding error message. If a crack in a contact piece or a break in a contact piece occurs during operation of the vehicle, which can occur, for example, with a heavily worn contact piece with no remaining wear reserve, the Actual test pressure deviates from its nominal value more than the calculated target test pressure.
- This drop is detected early on by the corresponding exceedance of the second threshold value by the change rate deviation, so that only a very short reaction time elapses between the occurrence of the error and the triggering of an intervention by the control device. This means that possible consequential damage that a defective contact piece can cause can be avoided or reduced by interrupting contact between the contact piece and the contact wire by lowering the pantograph.
- the invention also relates to an electrically or hybrid-electrically powered vehicle, in particular a road vehicle, which is equipped with a current collector according to one of the claims described above.
- FIG 1 a road vehicle with a pantograph according to the invention in front view
- FIG 2 a time diagram of target and actual test pressure during the error-free ramp-up of the feed pressure to the nominal value
- FIG 3 is a time diagram of the target and actual rate of change of the test pressure corresponding to FIG 2,
- FIG. 5 shows a time diagram of the rate of change deviation corresponding to FIG. 4,
- FIG 6 a time diagram of target and actual test pressure during the ramp-up of the feed pressure in the presence of a blockage in the pressure channel
- FIG. 7 shows a time diagram of the target and I st rate of change corresponding to FIG. 6, and 8 shows a time diagram of the I st test pressure and the I st rate of change of the test pressure based on the nominal feed pressure when a crack suddenly occurs in a grinding piece.
- a road vehicle 1 designed for example as a heavy commercial vehicle, with an electric or hybrid electric drive, uses an electrified lane of a roadway, for example a multi-lane motorway, over which there are two contact wires 2 of a two-pole overhead line system 3, designed as forward and return conductors.
- the road vehicle 1 has a current collector 4, which has two contact strips 4 arranged one behind the other in the longitudinal direction of the vehicle for electrically contacting the respective contact wire 2 for each contact pole.
- the current collector 4 comprises a pantograph-like support frame 5, for example with a lower arm and two upper arms, which are articulated to one another and to the vehicle.
- Each upper arm carries a rocker 6 which can be rotated about a transverse axis of the vehicle and on which a pair of contact strips 7 are spring-mounted.
- Each of the grinding strips 7 has an elongated grinding piece 9 made of graphite, which is carried by a grinding piece holder 8. At the lateral ends of the grinding strips, downwardly bent overrun horns are arranged.
- the support frame 5 is coupled to a lifting device 10 designed as an air bellows for raising and lowering the grinding strips 7.
- the lifting device 10 is fed with compressed air from a compressed air supply 11.
- the current collector 4 comprises a control device 12 which electrically controls valves in order to connect the lifting device 10 to the compressed air supply 11 for raising the support frame 5 or to shut off the lifting device 10 from the compressed air supply 11 for gravity-driven lowering of the support frame 5.
- the current collector 4 comprises a compressed air duct 13 connected to the compressed air supply 11.
- the Compressed air channel 13 can be partially formed by separate compressed air lines that can be laid flexibly along the support frame 5, branch off and extend into each of the grinding strips 7. In the grinding strips 7, the compressed air channel 13 is at least partially delimited by the respective grinding piece 9.
- the current collector 4 comprises a pneumatic throttle 14 arranged in the compressed air channel 13 between the compressed air supply 11 and the sliding piece 9.
- a feed pressure sensor 15 is connected to the compressed air channel 13 for the cyclical measurement of an actual feed pressure SDist prevailing upstream of the throttle 14.
- a test pressure sensor 16 is connected to the compressed air channel 13 for the cyclical measurement of an actual test pressure PDist prevailing in the test volume downstream of the throttle 14.
- the evaluation device 17 is also designed to cyclically determine a test pressure deviation APD of the actual test pressure PDact from the target test pressure PDsoll, and to generate an error message El when a first threshold value S 1 is exceeded by the determined test pressure deviation APD.
- cyclic should mean continuously at fixed time intervals, for example every 5 ms. The time intervals can also be given by a clock of the control device 12 of the current collector 4.
- the evaluation device 17 includes known means for electronic data processing, such as computer units and data memories not shown in detail Calculation algorithms for calculating the target test pressure PDsoll in the test volume.
- the difference between the supply air mass flow Qzu flowing in through the throttle 14 and the exhaust air mass flow Qab of the compressed air flowing out through the leak L is used as a value essential to the invention in the calculation of the target test pressure PDsoll.
- the supply air mass flow Qzu is determined by the current actual feed pressure SDist upstream of the throttle 14, by a passage cross-section of the throttle 14 and by the actual test pressure PDist prevailing in the test volume.
- the exhaust air mass flow Qab is determined by the actual test pressure PDist in the test volume, by the size of the leak L in the test volume and by the ambient pressure UD prevailing in the environment U.
- the calculation of the mass flows Qzu and Qab of the compressed air is based on a flow model of the throttle 14 and the leak L, in which a distinction is made between subcritical and supercritical flow depending on the pressure conditions upstream and downstream of the throttle 14 or the leak L.
- the evaluation device 17 is preferably designed to calculate the supply air mass flow Qzu from the measured actual feed pressure SDist, the measured actual test pressure PDist and a flow coefficient KV14 of the throttle 14 and the exhaust air mass flow Qab from the measured actual test pressure PDist, an ambient pressure DU and a flow coefficient KVL of the leak L.
- Pl pre-pressure upstream of the nozzle in bar
- P2 counter pressure downstream of the nozzle in bar
- KV flow coefficient in kg/h
- pN standard density in kg/m3
- T temperature in K.
- 297 K can be used for the temperature and 1.2 kg/m3 for the density.
- the flow coefficients KV for throttle 14 and leak L are determined empirically for a model of the pantograph 4 and are then unchangeable.
- the actual feed pressure SDist is used as the form PI and the actual test pressure PDist is used as the counterpressure P2
- the actual test pressure PDist is used as the form PI and as the counterpressure P2 the ambient pressure UD.
- the evaluation unit 17 From the size of the test pressure deviation APD, the evaluation unit 17 detects a crack or break in a grinding piece 9 with a gap width that is equivalent to a passage cross-section starting from, for example, 2 mm. Since the flow model continuously calculates the behavior of the target test pressure PDsoll in the test volume as a function of the measured actual feed pressure SDist upstream of the throttle 14, the specific test pressure deviation APD is insensitive to pressure fluctuations in the feed pressure SD. Such pressure fluctuations occur, for example, when additional consumers, such as the pneumatic lifting device 10, are connected to the compressed air supply 11.
- the evaluation device 17 is also designed to cyclically calculate an I st rate of change PD 'is of the actual test pressure PDist from successive measurements of the actual test pressure PDist, and a target from successive calculations of the target test pressure PDsoll - Rate of change PD 'should be calculated from the calculated target test pressure PDset, a change rate deviation APD 'of the actual rate of change PD 'is to be determined from the target rate of change PD 'should be determined, and if a second threshold value S2 is exceeded by the determined rate of change deviation APD ' to generate an error message E2.
- the respective rate of change indicates how quickly the target test pressure PDsoll or the actual test pressure PDist changes, which mathematically corresponds to the first derivative of the test pressure with respect to time.
- the lifting device 10 is electrically controlled in order to put it into or out of operation and to raise or lower the grinding strips 7. If the evaluation device 17 transmits a generated error message El or E2 to the control device 12, this can block the lifting of the contact strips 7 or lower the contact wire 2 contacting contact strips 7 in order to prevent a defective current collector 4 from having a cracked or broken one Wearing piece 9 contacts the contact wire 2.
- the evaluation device 17 is further designed to detect an exceedance of the first threshold value S 1 by the test pressure deviation APD and/or the second threshold value S2 by the rate of change deviation APD 'that occurs during the ramp-up of the feed pressure SD from an ambient pressure UD to a nominal feed pressure SDnenn To detect a blockage in the pressure channel 13 and generate a corresponding error message E3.
- Such blockages in the pressure channel 13 can be caused by production or assembly errors and would prevent a correct determination of a test pressure deviation APD and / or a change rate deviation APD 'and thus an error detection "Compressed air escapes through a break or crack, for example in the grinding piece".
- the evaluation device is designed in particular to detect an exceedance of the first threshold value S 1 by the test pressure deviation APD and/or the second threshold value S2 that occurs after the nominal feed pressure SDnenn has been reached through the change rate deviation APD ' as a crack or breakage of a grinding piece 9 and a corresponding error message El or. to generate E2. If a crack in a grinding piece 9 or a break in a grinding piece 9 occurs during operation of the vehicle 1, which can occur, for example, with a heavily ground grinding piece 9 without any remaining wear reserve, the actual test pressure PDist drops from its nominal value stronger than the calculated target test pressure PDsoll.
- FIG 2 shows how the measured actual test pressure PDist and the calculated target test pressure PDsoll develop over time t when the feed pressure SD is increased by means of the compressed air supply 11 in the test volume downstream of the throttle 14.
- FIG 4 shows the test pressure deviation APD between the actual test pressure PDist and the target test pressure PDsoll, which does not exceed a predetermined first threshold value Sl.
- the measured actual change rate PD'ist of the actual test pressure PDist follows the calculated target change rate PD'soll of the target test pressure PDsoll just as well, whereby the actual change rate PD'ist scatters around the curve of the calculated target change rate PD'soll approximately every 5 ms due to the discrete measurements.
- the change rate deviation APD' between the actual change rate PD'ist and the target change rate PD'soll does not exceed the predetermined second threshold value S2.
- the situation is different in the case of a blockage in the pressure channel 13, in which, according to FIG 6, the actual test pressure PDist rises faster than the target test pressure PDsoll and at the time shown, the test pressure deviation APD exceeds the first threshold value Sl. If one looks at the corresponding course of the rate of change according to FIG 7, the rate of change deviation APD' between the actual rate of change PD'ist and the target rate of change PD'soll already exceeds the second threshold value S2 at an earlier time, which is also shown. A failure of the break detection caused by a blockage in the pressure channel 13 can therefore be revealed earlier by monitoring the second threshold value S2.
- FIG. 8 shows, starting from regular operation, in which the nominal feed pressure SDnenn prevails in the test volume, how the actual test pressure PDist (upper curve in FIG. 8) and even faster the actual rate of change PD'act of the actual test pressure PDist drops when A leak occurs in the pressure channel 13, for example a break in a contact piece 9. Due to the faster drop in the rates of change PD'actual and PD'soll compared to the test pressures PDactual and PDsoll, the change rate deviation APD' will also exceed the second threshold value S2 earlier than the test pressure deviation APD will exceed the first threshold value Sl. By monitoring the second threshold value S2, the reaction time for a control intervention is shortened.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022210380.7A DE102022210380A1 (de) | 2022-09-30 | 2022-09-30 | Stromabnehmer mit Bruchüberwachung |
| PCT/EP2023/074027 WO2024068180A1 (de) | 2022-09-30 | 2023-09-01 | Stromabnehmer mit bruchüberwachung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4540090A1 true EP4540090A1 (de) | 2025-04-23 |
Family
ID=88016208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23768178.8A Pending EP4540090A1 (de) | 2022-09-30 | 2023-09-01 | Stromabnehmer mit bruchüberwachung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4540090A1 (de) |
| CN (1) | CN119907752A (de) |
| DE (1) | DE102022210380A1 (de) |
| WO (1) | WO2024068180A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3905962C1 (de) * | 1989-02-25 | 1990-04-26 | Schunk Bahntechnik Ges.M.B.H., Salzburg, At | |
| FR2646381B1 (fr) * | 1989-04-28 | 1991-07-26 | Faiveley Sa | Dispositif pour regler la force d'appui d'un pantographe sur un fil catenaire et procede s'y rapportant |
| DE3914675A1 (de) | 1989-05-03 | 1990-11-15 | Hoffmann Elektrokohle | Schleifstueck fuer stromabnehmer |
| AU2016202487A1 (en) * | 2015-04-19 | 2016-11-03 | Unique Engineering Australia Pty Ltd | Pantograph emergency lowering system |
| EP3147152A1 (de) | 2015-09-28 | 2017-03-29 | Siemens Aktiengesellschaft | Nicht schienengebundenes fahrzeug |
| DE102018214873A1 (de) * | 2018-08-31 | 2020-03-05 | Siemens Mobility GmbH | Stromabnehmer für ein nicht schienengebundenes, elektrisches Triebfahrzeug, Triebfahrzeug mit einem solchen Stromabnehmer und Verfahren zum Betreiben eines solchen Stromabnehmers |
| ES2999508T3 (en) * | 2019-08-12 | 2025-02-26 | Schunk Transit Sys Gmbh | Drive system for a current collector and method for raising or lowering |
| FR3102414B1 (fr) * | 2019-10-24 | 2021-10-08 | Faiveley Transp Tours | Dispositif de descente rapide pour pantographe, pantographe ainsi équipé, procédé de mise en œuvre et procédé d’amélioration d’un tel pantographe |
-
2022
- 2022-09-30 DE DE102022210380.7A patent/DE102022210380A1/de not_active Withdrawn
-
2023
- 2023-09-01 EP EP23768178.8A patent/EP4540090A1/de active Pending
- 2023-09-01 CN CN202380069373.1A patent/CN119907752A/zh active Pending
- 2023-09-01 WO PCT/EP2023/074027 patent/WO2024068180A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN119907752A (zh) | 2025-04-29 |
| WO2024068180A1 (de) | 2024-04-04 |
| DE102022210380A1 (de) | 2024-04-04 |
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