Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
  • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
  • H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
  • H02P1/20—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor by progressive reduction of resistance in series with armature winding
• • 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
• • 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

Definitions

• the invention relates to an arrangement for controlling an electric vacuum pump for a vehicle.
• the control of such pumps can be made by means of relays or a separate control unit (ECU), which supply the pumps with the respective on-board voltage switched.
• ECU electronice control unit
• Inrush currents can occur in special situations with peaks up to 100A. In modern vehicle architectures, this peak power is attempted to be significantly reduced in order not to impair parallel systems. Therefore, one strives, in particular when starting actuators or pumps, limit inrush current to an acceptable level (20A - 30A).
• Pulse width modulation for controlling the
• the current is additionally ohmic static
• the duration of the start-up current depends on the respective system and can be specified.
• the ohmic load integrated in the circuit causes no difference to the PWM
• Resistors can also be connected in parallel in groups, whereby by suitable choice of each
• Vacuum pump motor a reduction of
• Starting (starting) currents depend on various parameters (eg on-board voltage, circuit or
• Resistance path remains activated longer. That e.g. the activation time increases linearly with the on-board voltage. As at lower temperatures also the ohmic
• the current consumption of the motor can also be measured by means of the voltage drop across the resistance branch.
• the current measurement can be used to determine the disconnection of the resistance branch. It is the
• Resistor branch at the time when the effective current has fallen below a maximum limit (e.g., 30A).
• the value should in turn be configurable here, possibly via a definable
• the power consumption of the motor cyclically, even if the
• the indication of a running pump motor for the switching of the resistance paths or the resistance paths can be used.
• the resistance path remains activated until a correct start-up of the pump is detected (for example via the pump speed).
• a limit value for the rated speed can be configurable.
• the additional resistive load under certain environmental conditions (eg undervoltage, low temperature)
• the additional resistor paths are connected sequentially (reduction of the total resistance).
• the temperature of the electronic board or the semiconductor elements can also be used. Exceeds the temperature of the semiconductor element or the modeled temperature of the element, or determined by the temperature of the electronic board temperature of the
• Figure 1 shows a first embodiment of
• Resistance path Figure 2 further embodiments of the
• FIG. 1 is a block diagram of a first embodiment
• the electric vacuum pump or its motor 1 is powered by a DC voltage source 2 with electrical energy. This is between minus pole of the
• the electronic switch 4 is by means of an electronic control not indicated in the figure
• start-up currents When closing this circuit and thus at a switch on the engine 1 or the vacuum pump would act without further measures in a start-up phase in which the engine 1 has not yet reached its rated speed, increased currents in the circuit, so-called start-up currents. These currents are undesirable, they stress the voltage source 2 unusually high, so that their voltage can drop, which in turn other components in the vehicle, which also from the
• Voltage source 2 are supplied with electrical energy, can be impaired in their function.
• the aim of the invention is therefore to reduce these start-up currents or avoid at all.
• the arrangement according to the invention according to FIG. 1 has a resistance path 5 with an ohmic resistance 6 and an electronic switch 7, which
• the two paths 3 and 5 are arranged in parallel and means of the switch 4 and 7 alternatively switchable in the circuit.
• the path 3 is virtually free of resistance, whereas the resistance path 5 has the ohmic resistance 6.
• Resistor 7 switchable.
• Resistor 6 connected in the circuit and limits the start-up ohmic.
• the switch 4 is closed and the switch 7 is opened. Then the arrangement is in its normal operation and the engine 1 is virtually free of resistance to the
• the resistor 6 is connected to the circuit for the purpose of ohmic limitation of the starting current only in the start-up phase.
• Switches 4 and 7 an extremely effective ohmic limitation of the starting current of the motor 1 of the vacuum pump, wherein the extent of this current limit by appropriate selection of the size of the ohmic resistance 6 is adjustable.
• For a second emergency shutdown option can be provided between plus-pole of the voltage source 2 and the second terminal of the motor 1 emergency switch 14.
• Figure 2 also shows a schematic diagram
• path 8 having an ohmic resistance 9 and an electronic switch 10
• path 11 having an ohmic resistance 12 and an electronic switch 13.
• the ohmic values of the two resistors 9 and 12 are chosen to be different. The following is about it assumed that the resistor 12 a higher
• the electronic control initially switches the higher resistance 12 active at the beginning of a start-up phase by closing the switch 13. In this phase, the switches 10 and 4 are opened.
• paths 8 and 14 can be increased by, in addition to the paths 8 and 14 further resistance paths are provided, as indicated in Figure 2 on the basis of the paths n-1 and n.
• These paths 8, 14, n-1 and n can be activated sequentially one after the other according to the sequence explained above. There is also the possibility, not always only one path at a time, but two or more

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• Motor And Converter Starters (AREA)
• Control Of Positive-Displacement Pumps (AREA)
• Valves And Accessory Devices For Braking Systems (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=46511498

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Family Cites Families (12)

• 2011
  • 2011-12-19 DE DE102011088976A patent/DE102011088976A1/de not_active Ceased
• 2012
  • 2012-01-24 US US13/982,591 patent/US20130342147A1/en not_active Abandoned
  • 2012-01-24 WO PCT/EP2012/051011 patent/WO2012104169A2/fr active Application Filing
  • 2012-01-24 KR KR1020137022764A patent/KR20140007878A/ko not_active Application Discontinuation
  • 2012-01-24 EP EP12700980.1A patent/EP2671317A2/fr not_active Withdrawn
  • 2012-01-24 CN CN201280007110.XA patent/CN103503301B/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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