EP0592804A1 - Dispositif pour la commande de plusieurs actionneurs à courant stabilisé au moyen d'un ordinateur de commande - Google Patents

Dispositif pour la commande de plusieurs actionneurs à courant stabilisé au moyen d'un ordinateur de commande Download PDF

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Publication number
EP0592804A1
EP0592804A1 EP93114215A EP93114215A EP0592804A1 EP 0592804 A1 EP0592804 A1 EP 0592804A1 EP 93114215 A EP93114215 A EP 93114215A EP 93114215 A EP93114215 A EP 93114215A EP 0592804 A1 EP0592804 A1 EP 0592804A1
Authority
EP
European Patent Office
Prior art keywords
control
actuators
measuring
individual
resistor
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.)
Withdrawn
Application number
EP93114215A
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German (de)
English (en)
Inventor
Wolfgang Dipl.-Ing. Bullmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0592804A1 publication Critical patent/EP0592804A1/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/577—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices for plural loads

Definitions

  • the invention relates to a device for current-controlled control of a plurality of actuators by means of a control computer, an individual control transistor being provided for each actuator and the actual current value being detected by means of a measuring resistor.
  • a separate measuring resistor is provided in the circuit of each actuator, and an analog control circuit is assigned to each actuator, in which the measured variable recorded in analog form is converted into a control signal for influencing the duty cycle of a control signal sequence from the control computer becomes.
  • the analog circuitry becomes very large and leads to a costly implementation of the entire control arrangement. The large number of necessary precise measuring resistors also increases the cost.
  • the device according to the invention with the characterizing features of the main claim has the advantage that even with a larger number of individually controlled or regulated actuators only a single measuring resistor is required in a single measuring circuit.
  • Special analog control circuits to control the control transistors in the individual circuits of the actuators are no longer necessary, rather the control takes place directly via the control computer, and all control processes take place in it.
  • the circuitry and thus the costs are significantly reduced, and the number of connected actuators to be controlled can be very large.
  • Subsequent addition of further actuators is also possible without the control process itself having to be changed.
  • the only measuring resistor or measuring path can be used unchanged with such an extension.
  • control connections of the control transistors are connected directly or via at least one amplifier stage to control outputs of the control computer, as a result of which the circuit complexity can be kept very low.
  • the switching means for each actuator have two switching elements which can be controlled in opposite directions, by means of which this actuator can be connected either to the measuring and control arrangement or to the associated individual control transistor. To implement the switching means, therefore, only two switching elements and possibly an inverter for controlling the switching elements in opposite directions are required per actuator.
  • freewheeling diodes are expediently provided, each bridging the actuator, the switching means and the associated resistor in order to be able to regulate to an average current value.
  • controllable switching elements and / or the control transistors and / or the freewheeling diodes are expediently all of the same type and have the same properties.
  • control circuits on the one hand and in the measuring and control circuit on the other hand so that a transfer of the control signal sequence determined in the measuring and control circuit into the control circuit is readily possible.
  • the switchover to the measuring and control arrangement takes place in a fixed time pattern and / or in a fixed sequence.
  • the changeover of these actuators can advantageously take place during the dynamic changes in the case of individual actuators by means of the switching means to the measuring and control arrangement in a narrower time frame and / or more frequently than the other actuators .
  • dynamic processes are regulated faster and more precisely.
  • the time intervals between switchovers and / or the frequency of the switchovers can be a function of the dynamics of the respective actuators.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the single figure shows a circuit device for current control of three actuators by a control computer.
  • three inductive actuators 10-12 are controlled in a current-controlled manner by a control computer 13, which can be a microcomputer, for example.
  • the inductive actuators can be electrohydraulic or electropneumatic actuators, for example pressure regulators for a transmission control of a motor vehicle transmission or the like.
  • a switching element 14-16, a resistor 17-19 and a control transistor 20-22 are connected in series with the actuators 10-12. These three series connections are each acted upon by a supply voltage Uv, the positive connection 23 being connected to the actuators 10-12, while the opposite connections of the series connections are connected to ground or are connected to the negative pole of the supply voltage Uv.
  • control electrodes of the switching elements 14-16 and the control transistors 20-22 are connected to control outputs of the control computer 13.
  • connections of the actuators 10 - 12 which are not at the positive connection 23 are also connected to one another via a respective switching element 24 - 26, the connection point being connected to ground via the series connection of a measuring resistor 27 with a further control transistor 28.
  • the switching elements 24-26 are controlled in opposite directions to the switching elements 14-16.
  • the control connections of the switching elements 14-16 are each connected to the control connections of the switching elements 24-26 via inverters 29-31.
  • the two connections of the measuring resistor 27 are connected to the inputs of a measuring amplifier 32, which can be a differential amplifier, for example. Its output is connected to an input of the control computer 13.
  • junctions between the resistors 17-19 and 27 with the control transistors 20-22 and 28 are connected to the positive terminal 23 via free-wheeling diodes 34-37.
  • the measuring resistor 27 has the same resistance value as the resistors 17-19. All switching elements 14-16 and 24-26 are of the same type and have the same electrical properties. This also applies to the control transistors 20-22 and 28 with one another, as well as to the freewheeling diodes 34-37. In the exemplary embodiment, the switching elements 14-16 and 24-26 are designed as switching transistors, but they can also be implemented using other known switches or semiconductor switches be realized.
  • the mode of operation of the exemplary embodiment shown in the single figure is that first the control transistors 20-22 are acted upon by the control computer 13 with individual control signal sequences during operation in order to generate the respectively desired average current values in the inductive actuators 10-12, which are above setpoints in the Control computer 13 can be specified, be it via a program or by external target signals.
  • the switching elements 14-16 are electrically conductive and the switching elements 24-26 are blocked.
  • control signals are sequentially applied to the control outputs 38-40 of the control computer 13 connected to the switching elements 14-16.
  • a control signal should be present at the control output 38. This control signal, for example a 0 signal, blocks the switching element 14 and the switching element 24 conducts electricity.
  • the last control signal sequence applied to the control transistor 20 is fed to the control transistor 28, so that initially the mean current value in the inductive actuator 10 does not change, since the series circuit consisting of the switching element 14, the resistor 17 and the control transistor 20 with the switching element 24, the measuring resistor 27 and the control transistor 28 existing series circuit is identical.
  • the current value detected via the measuring resistor 27, processed in the measuring amplifier 32 and converted is supplied to the control computer 13 as the actual value. There it is compared by means of a conventional control program known per se with the predetermined target value for the inductive actuator 10, the control signal sequence for the control transistor 28 being changed until there is a control deviation Control deviation becomes zero. Then, by switching the control signal at the control output 38, the switching element 14 is again conductive and the switching element 24 is blocked.
  • control signal sequence that was last adjusted is supplied to the control transistor 20 with a duty cycle that is now adapted to the desired value, so that the newly adjusted current value is retained in the inductive actuator 10.
  • the same process now continues sequentially for the other actuators 11 and 12, so that after one cycle, all actuators 10 to 12 have been adjusted or readjusted to their respectively specified setpoint with respect to the desired average current value. The cycle can then start again.
  • the number of actuators to be controlled in this way is of course not limited to the number 3, but further actuators can be connected in parallel in the same way.
  • the control computer 13 determines at which actuators 10 to 12 the setpoint remains unchanged and at which actuators this setpoint changes dynamically. If a dynamic change is detected, the actuator concerned is readjusted more frequently, for example every 20 ms, while the other actuators are readjusted with a static setpoint only about every second.
  • the actuator which is subjected to a dynamic process, is therefore more frequently acted upon in shorter time intervals by the measuring and regulating arrangement formed by the measuring resistor 27 and the control transistor 28, in order to achieve a more precise readjustment of the mean current value which is adapted to the dynamic process.
  • the control signal sequence applied to one of the control transistors 20-22 can also change outside of a measurement and control interval by interpolation in the control computer 13.
  • the measuring resistor 27 or the corresponding resistor 17-19 lie in the other parallel paths within the freewheeling circuit, which is formed by the respective freewheeling diode 37 or 34-36 and the actuators 10-12 becomes.
  • control computer 13 at its control outputs connected to the control transistors 20-22 and 28 does not have the necessary output power to control these control transistors, amplifier stages can of course be connected in a known manner to these control outputs. The same applies to the actuation of the switching elements 14-16 and 24-26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Linear Motors (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Electronic Switches (AREA)
EP93114215A 1992-10-13 1993-09-04 Dispositif pour la commande de plusieurs actionneurs à courant stabilisé au moyen d'un ordinateur de commande Withdrawn EP0592804A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4234421A DE4234421A1 (de) 1992-10-13 1992-10-13 Vorrichtung zur stromgeregelten Steuerung mehrerer Stellglieder mittels eines Steuercomputers
DE4234421 1992-10-13

Publications (1)

Publication Number Publication Date
EP0592804A1 true EP0592804A1 (fr) 1994-04-20

Family

ID=6470306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114215A Withdrawn EP0592804A1 (fr) 1992-10-13 1993-09-04 Dispositif pour la commande de plusieurs actionneurs à courant stabilisé au moyen d'un ordinateur de commande

Country Status (4)

Country Link
US (1) US5343078A (fr)
EP (1) EP0592804A1 (fr)
JP (1) JPH06222844A (fr)
DE (1) DE4234421A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0768682A1 (fr) * 1995-10-10 1997-04-16 Nordson Corporation Dispositif et procédé d'identification d'un nombre de charges de charges inductives en parallèle
EP0837382A1 (fr) * 1996-10-21 1998-04-22 Eaton GmbH Dispositif pour le réglage d'une tension

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218782A1 (de) * 1992-06-06 1993-01-14 Zahnradfabrik Friedrichshafen Verfahren zum ansteuern von elektrischen, stromgesteuerten stellgliedern
JPH11224679A (ja) * 1998-02-06 1999-08-17 Matsushita Electric Ind Co Ltd 固体高分子型燃料電池及びその製造方法
US6371162B1 (en) * 2000-04-20 2002-04-16 Fisher Controls International, Inc. Electric actuator for fluid control valves
DE10041880B4 (de) * 2000-08-25 2008-04-10 Hella Kgaa Hueck & Co. Verfahren zum Betreiben von mindestens zwei elektrischen Verbrauchern
US7021072B2 (en) 2003-04-24 2006-04-04 Honeywell International Inc. Current control loop for actuator and method
WO2005036296A1 (fr) * 2003-09-23 2005-04-21 Honeywell International Inc. Dispositif et procede permettant de commander le courant electrique d'un actionneur
US8084982B2 (en) 2008-11-18 2011-12-27 Honeywell International Inc. HVAC actuator with output torque compensation
DE102019107135B3 (de) * 2019-03-20 2020-06-10 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren zur Fehlerdiagnose und/oder EME-Optimierung mittels Flankendetektion im Strommesspfad

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6020217A (ja) * 1983-07-15 1985-02-01 Fujitsu Ltd 電源回路の制御および監視方法
EP0168864A1 (fr) * 1984-07-03 1986-01-22 Ascom Hasler AG Circuit de régulation et de charge
EP0419993A2 (fr) * 1989-09-28 1991-04-03 BICC-Vero Electronics GmbH Module de commutation parallèle
EP0482536A2 (fr) * 1990-10-23 1992-04-29 International Business Machines Corporation Convertisseur de tension à sortie commutable
EP0515712A1 (fr) * 1991-05-27 1992-12-02 Moeller GmbH Dispositif de mesure des courants à phase dans des réseaux polyphasiques

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016474A (en) * 1975-04-25 1977-04-05 Ecc Corporation Circuit for controlling the charging current supplied to a plurality of battery loads in accordance with a predetermined program
US4514619A (en) * 1982-09-30 1985-04-30 The B. F. Goodrich Company Indirect current monitoring via voltage and impedance monitoring
DE3720683A1 (de) * 1987-06-23 1989-01-05 Bosch Gmbh Robert Vorrichtung und verfahren zur ansteuerung und kontrolle von elektrischen verbrauchern, insbesondere gluehkerzen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6020217A (ja) * 1983-07-15 1985-02-01 Fujitsu Ltd 電源回路の制御および監視方法
EP0168864A1 (fr) * 1984-07-03 1986-01-22 Ascom Hasler AG Circuit de régulation et de charge
EP0419993A2 (fr) * 1989-09-28 1991-04-03 BICC-Vero Electronics GmbH Module de commutation parallèle
EP0482536A2 (fr) * 1990-10-23 1992-04-29 International Business Machines Corporation Convertisseur de tension à sortie commutable
EP0515712A1 (fr) * 1991-05-27 1992-12-02 Moeller GmbH Dispositif de mesure des courants à phase dans des réseaux polyphasiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 141 (P - 364)<1864> 15 June 1985 (1985-06-15) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0768682A1 (fr) * 1995-10-10 1997-04-16 Nordson Corporation Dispositif et procédé d'identification d'un nombre de charges de charges inductives en parallèle
US5666286A (en) * 1995-10-10 1997-09-09 Nordson Corporation Device and method for identifying a number of inductive loads in parallel
EP0837382A1 (fr) * 1996-10-21 1998-04-22 Eaton GmbH Dispositif pour le réglage d'une tension

Also Published As

Publication number Publication date
JPH06222844A (ja) 1994-08-12
DE4234421A1 (de) 1994-04-14
US5343078A (en) 1994-08-30

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