Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
  • G01R31/34—Testing dynamo-electric machines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/02—Stopping, starting, unloading or idling control
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/06—Control using electricity
  • F04B49/065—Control using electricity and making use of computers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/10—Other safety measures
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B51/00—Testing machines, pumps, or pumping installations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
  • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
  • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B2203/00—Motor parameters
  • F04B2203/02—Motor parameters of rotating electric motors
  • F04B2203/0201—Current
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B2207/00—External parameters
  • F04B2207/70—Warnings
  • F04B2207/703—Stopping

Definitions

• the invention relates to a method for monitoring the function of an electric motor-driven pump according to the closer defined in the preamble of claim 1. Art also relates to the use of such a method.
• Electric motor-driven pumps are used in many systems, especially in motor vehicles, in which they are used for the promotion of media, for example for the promotion of cooling water.
• media for example for the promotion of cooling water.
• it is important that their function is constantly monitored in order to be able to react quickly to any errors or failures, for example to overheat components cooled by the cooling medium conveyed by the pump to be able to prevent.
• motor driven pump is connected to an internal communication interface, which in turn is connected to a central control unit.
• Typical vehicle applications are typically one
• Cooling medium should have been cooled.
• the object of the present invention is now to provide a method for monitoring the function of such an electric motor-driven pump, which ensures easy and efficient secure and reliable monitoring of the pump. According to the invention, this object is achieved by the method having the features in the characterizing part of claim 1. Advantageous embodiments of the method according to the invention will become apparent from the dependent therefrom
• Electromotive pump in the manner set out above it is in addition to a
• the method according to the invention uses only a few additional programming steps in the software of the central control unit, so that it is possible to dispense with additional sensors, the monitoring and evaluation of the measurement data supplied by them and so on.
• the structure is thus simple and efficient, and it can be retrofitted without problems in existing systems by updating the software of the control unit.
• a particularly preferred use of the method according to the invention is the monitoring of a media pump in a vehicle. Especially at
• Vehicle applications play the security of conveying media, in particular a cooling medium for cooling at least one component, a special role.
• systems in vehicles should be simple, efficient and very safe. Therefore, the inventive method is particularly well suited because it is able to realize the additional monitoring function for the electric motor-driven pump without additional effort in terms of the sensor, in terms of lines to be laid and the like.
• the vehicle is an electrically driven vehicle, in particular a vehicle with a fuel cell system.
• FIG. 1 is a schematic diagram of a structure for carrying out the method according to the invention.
• Fig. 2 shows an exemplary vehicle, in which the inventive method
• an electric motor driven pump 1 can be seen. This consists essentially of the edged with the dot-dash line components.
• An essential component of the electric motor-driven pump is the conveyor 2 and the electric motor 3. These are typically connected to each other via a shaft.
• An internal electronics 4 is connected via two indicated line elements 5 to a first voltage source Ui for supplying power to the pump 1 driven by an electric motor. About this internal electronics 4 in a known manner also a function monitoring of
• electromotive pump 1 realized.
• different function parameters are recorded.
• the values of the function parameters are then sent to an internal
• Communication interface 6 passed, as indicated by the dashed double arrow.
• This internal communication interface 6 is connected to a data bus 7, for example a CAN bus or a LIN bus. Of course, the use of other data bus systems is possible.
• a central control unit 8 Via a central control unit 8, which typically not only with the internal
• the internal communication interface 6 is connected via two indicated line elements 9 to a second voltage source U 2 for power supply.
• values of functional parameters are acquired via the internal electronics 4 of the pump 1 and sent to the internal communication interface 6
• Communication device 6 reports the values stored in the data via the data bus 7 to the control unit 8, even if, for example due to a failure of the first voltage source Ui from the internal electronics 4 of the pump 1 no actual values are delivered.
• the central control unit 8 then continues to receive these values, which were last delivered by the internal electronics 4 and which lie within the prescribed limit values, from the internal communication device 6. It is therefore assumed that the pump 1 is working properly, which is not the case or does not have to be the case.
• the time profiles of the values of the functional parameters, which are transmitted to the central control unit 8 by the internal communication interface 6, are monitored in the control unit 8.
• Interface 6 are further reported, as they continue in the event of failure of the pump 1 while continuing to supply the control voltage U 2 continues to receive the last values received from the pump 1, as long as they were not overwritten by other values.
• the central control unit 8 such a situation can now be detected by monitoring the time profile of the transmitted values, since a lack of time variation of the values in the area of the central control unit 8 is due to a disturbance in the communication between the internal communication interface 6 and the pump 1 closes.
• Such can potentially be a failure of the pump 1, for example due to a
• Fuel cell vehicle should be designed. This includes
• Fuel cell system with a fuel cell 10 This fuel cell 10, hydrogen from a pressure tank 11 and air-oxygen via an air conveyor 12 is provided.
• the electrical power generated is via a
• Cooling circuit 15 Power electronics 13, for example, removed from a traction motor 14.
• the fuel cell 10 is now typically cooled by means of a cooling medium through a cooling circuit 15, which is very simplified and schematically indicated here.
• the cooling medium is circulated in the cooling circuit 15 via the electric motor driven pump 1 and flows through a vehicle radiator 6, in the region of which it cools, and via a heat exchanger 17 in the region of the fuel cell 10, in which it absorbs waste heat of the fuel cell 10.
• a cooling circuit which in principle could of course also be arranged in a combustion engine driven vehicle, the use of the cooling medium
• inventive method for monitoring the function of the electric motor driven pump 1 of particular advantage is especially true, since in the area of the vehicle F due to the inventive method to additional sensors, additional to be laid pipe elements and the like for safe
• Function monitoring of the pump 1 can be completely dispensed with. On the other hand, can be safely and reliably excluded by the safe monitoring of the function of the pump 1, a malfunction in the cooling circuit 1, which would typically result in overheating of the fuel cell 10. This allows the fuel cell 10 spare, so that it reaches a longer life. In addition, critical situations or critical temperatures in the area of the fuel cell 10, in which hydrogen and oxygen are in regular operation, can be prevented. This creates a very safe vehicle F, which can be easily, inexpensively and trained very safe for its passengers.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Fuel Cell (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Control Of Electric Motors In General (AREA)
• Control Of Positive-Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2011
  • 2011-12-09 DE DE102011120686A patent/DE102011120686A1/de not_active Withdrawn
• 2012
  • 2012-10-19 EP EP12778245.6A patent/EP2788625A1/de not_active Withdrawn
  • 2012-10-19 CN CN201280059807.1A patent/CN103987966A/zh active Pending
  • 2012-10-19 WO PCT/EP2012/004399 patent/WO2013083217A1/de active Application Filing
  • 2012-10-19 JP JP2014545121A patent/JP2015504995A/ja active Pending
  • 2012-10-19 US US14/362,965 patent/US20140320163A1/en not_active Abandoned

Non-Patent Citations (1)

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