EP1830370A2 - Dispositif destiné à la commande d'un mécanisme de commande électromagnétique - Google Patents

Dispositif destiné à la commande d'un mécanisme de commande électromagnétique Download PDF

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Publication number
EP1830370A2
EP1830370A2 EP07004336A EP07004336A EP1830370A2 EP 1830370 A2 EP1830370 A2 EP 1830370A2 EP 07004336 A EP07004336 A EP 07004336A EP 07004336 A EP07004336 A EP 07004336A EP 1830370 A2 EP1830370 A2 EP 1830370A2
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EP
European Patent Office
Prior art keywords
current
supply voltage
actuator
voltage
switching
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.)
Granted
Application number
EP07004336A
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German (de)
English (en)
Other versions
EP1830370B1 (fr
EP1830370A3 (fr
Inventor
Karl Hehl
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.)
KEINATH, RENATE
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Individual
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Publication of EP1830370A3 publication Critical patent/EP1830370A3/fr
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Publication of EP1830370B1 publication Critical patent/EP1830370B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1844—Monitoring or fail-safe circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
    • F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1816—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current making use of an energy accumulator
    • H01F2007/1822—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current making use of an energy accumulator using a capacitor to produce a boost voltage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F2007/1888—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings using pulse width modulation

Definitions

  • the invention relates to a device for controlling an electromagnetic actuator such as a solenoid, in particular a solenoid to hydraulic or pneumatic control valves, preferably in the field of plastic injection molding machines according to the preamble of claim 1.
  • an electromagnetic actuator such as a solenoid, in particular a solenoid to hydraulic or pneumatic control valves, preferably in the field of plastic injection molding machines according to the preamble of claim 1.
  • a method and a device which, with the aid of pulse-width-modulated supply voltage, permit energy-reduced operation with readjusted power adaptation of an electromagnetic actuator.
  • This method reduces the power cyclically to a minimum power (P 0 ) and can thus reach the limit of the holding torque of the actuator.
  • P 0 minimum power
  • coil current and coil voltage are measured and the power in the coil is reduced continuously or in fixed stages until the actuator moves, ie the counterinduction in the coil is detected by the coil current.
  • This power P 0 is provided with an offset and delivered to the coil as a minimum power.
  • the method is independent of the connected load, with small inductive loads, the recognition of the actuator movement is difficult because of the low mutual induction by coil current and voltage. There is also a risk that in critical applications under high load or at spontaneously acting disturbances at least partially moves the load out of the desired state.
  • the DE 41 09 233 C2 shows a control electronics with pulse width modulated output signal for driving electrical actuators of a hydraulic system, which determined without overexcitation on the basis of the determined impedance, the characteristics of the actuator and these are controlled by the pulse width modulation. (see also DE 101 04 754 A1 ).
  • the present invention seeks to identify valve spools according to their rated voltage and make them available for industrial use.
  • valves lower nominal power can be operated at higher switching speed even under higher voltage.
  • the supply voltage is at least as high as the rated voltage of the actuator. Due to the overexcitation, variations in the duty cycle via different actuators of a series and / or different operating points (for Valves eg pressure, flow rate, temperature, viscosity of the medium) minimized.
  • valve coils of different nominal voltages By adapting the switch-on duration by means of the pulse-width-modulated supply, the electromagnetic actuators can be utilized for a wide range of different supply voltages.
  • the height of the supply voltage is essentially limited only by the permissible insulation voltage of the coil. In operation, fluctuations in the supply voltage are compensated by adjusting the duty cycle, so that the average coil current remains constant.
  • the method described below is preferably used on actuators of valves on an injection molding machine for processing plasticizable materials, in particular on a plastic injection molding machine.
  • a supply voltage U V is applied via the outputs 80.4, 80.5 to a connected load 100 via at least one switching element 10.
  • This load is in the exemplary embodiment, for example, the coil of an actuator of a valve with actuator and slider.
  • the circuit is connected via input 80.2 to the supply voltage U V and via input 80.3 to GND.
  • the switching element 10 is switched on or off via a control 60 via terminals 60.2.
  • a current sensor 20 is provided. If the switching element 10 is closed, current flows from the supply pin 80.2 via current sensor 20, switching element 10 and via the connected load 100 to GND.
  • the electromagnetic actuator turns on.
  • the supply voltage is at least as high as the rated voltage of the actuator.
  • the thereby flowing current is the control element 60 provided by the current sensor 20 as information available.
  • the height of the supply voltage U V is measured. From the two information current (here coil current) and voltage (here supply voltage), the impedance of the load 100 can be calculated.
  • the device for detecting current and supply voltage can be integrated in the control element 60 or be present externally.
  • the current sensor 20 may also be integrated in the switching element 10.
  • the decision with which power the load (coil of the electromagnetic actuator) must be operated is determined in the control element 60 on the basis of the calculated impedance.
  • the switching element 10 is switched by the control 60 in the clock mode and thus adapted via a pulse width modulated voltage, the power to the load of the coil.
  • the duty cycle within the clock mode is also dependent on the applied supply voltage U V. With increasing supply voltage, the duty cycle is reduced and vice versa. As a result of this adaptation, the average coil current is kept constant even when the supply voltage U V is variable.
  • the control is a variety of different inductive loads of different rated power known.
  • the switching frequency of the pulse width modulation (PWM) is selected so high that the inductive load acts like the storage inductor of a switching regulator.
  • a "quasi" DC current sets in with little residual ripple.
  • Coil current and supply voltage are preferably measured in each cycle.
  • the supply voltage U V must be at least as high as the nominal voltage of the connected Load. If the supply voltage exceeds the rated power of the control element, it is dynamically switched to cycle mode (and back again).
  • the control elements can thus be operated significantly above rated voltage (limited only by the insulation resistance of the insulation of the coil wire).
  • the PWM is dynamically adapted to the supply voltage. Thus, with a voltage source loads of different nominal voltage can be operated.
  • the switching of the load can be detected and thus valve clamps, e.g. by foreign bodies.
  • the monitoring of the coil current can be used as a short-circuit detection, as an electronic fuse. This increases the short circuit safety of the actuator itself
  • the circuit device may have an additional control input 80.1, by which the switching on and off of the circuit itself can be controlled
  • two switching elements 10, 30 are provided in the drive circuit 80. Both switching elements, which are designed here as a MOSFET switch, logically as normally open, are switched on and off via control 60 via terminals 60.2, 60.3.
  • a current sensor 20 here, for example, a shunt resistor
  • Indicated at 70 is an internal extinguishing element.
  • both switching elements 10, 30 are closed, current flows from the input 80.2 via switching element 10, current sensor 20, via the connected load 100 and via switching element 30 to GND.
  • the electromagnetic actuator turns on.
  • the thereby flowing current is the control element 60 from the current sensor 20 via the A / D converter 40 to the control 60 at the input 60.5 provided as information.
  • the level of the supply voltage is measured and provided via the A / D converter 50 for voltage measurement to the control element 60 at the input 60.4. From the two information current and voltage, the inductive load is determined.
  • the circuit works as follows. According to FIG. 3, a digital control signal is present at the input 60.1 of the control element at the time tIN1 .
  • the control simultaneously closes both switching elements 10, 30.
  • the voltage U LAST U V - losses on the switching elements 10, 30 and the current sensor 20
  • the coil current I LOAD increases in an e-function until the time t 1 .
  • time t 3 identifies the control on the basis of the coil current and the supply voltage, the rated power of the connected load 100.
  • no power adjustment by means of PWM is required.
  • the inflection point occurring at the moment of time t 2 at the time of switch-on can be used to increase the current for function monitoring of the actuator, since this inflection point occurs as a result of the movement of the actuator.
  • the curve of the current over time at this point is not monotonically increasing or possibly even unsteady
  • a coil of lower rated voltage is connected as the load according to FIG. 4, after the actuator is safely in the end position, it is switched to the cyclic mode.
  • the current and thus the effective power across the coil is reduced to the nominal value of the device to prevent thermal destruction of the coil.
  • the control simultaneously closes both switching elements 10, 30.
  • the voltage U LAST is applied to the connected load 100.
  • the coil current I LAST increases in an e-function up to the time t 4 .
  • the current increase reaches the maximum value at time t 6 .
  • the control identifies the rated power of the connected load 100 based on the coil current and the supply voltage and clocks at least one of the switching elements 10, 30 at the times t 7 , t 8 . as a result, when the voltage U LAST is pulsed, the coil current I LOAD is reduced.
  • the overexcitation of the electromagnetic actuator minimizes the variations in duty cycle across various devices in a series and / or different operating points.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electronic Switches (AREA)
EP20070004336 2006-03-02 2007-03-02 Dispositif destiné à la commande d'un mécanisme de commande électromagnétique Active EP1830370B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610009628 DE102006009628A1 (de) 2006-03-02 2006-03-02 Vorrichtung zur Steuerung eines elektromagnetischen Stellantriebs

Publications (3)

Publication Number Publication Date
EP1830370A2 true EP1830370A2 (fr) 2007-09-05
EP1830370A3 EP1830370A3 (fr) 2009-04-15
EP1830370B1 EP1830370B1 (fr) 2012-08-15

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ID=37944893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070004336 Active EP1830370B1 (fr) 2006-03-02 2007-03-02 Dispositif destiné à la commande d'un mécanisme de commande électromagnétique

Country Status (2)

Country Link
EP (1) EP1830370B1 (fr)
DE (1) DE102006009628A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009105410A1 (fr) * 2008-02-22 2009-08-27 Baxter International Inc. Machine à fluide médical comportant un système de commande à solénoïde doté d’un courant de maintien réduit
US7746620B2 (en) 2008-02-22 2010-06-29 Baxter International Inc. Medical fluid machine having solenoid control system with temperature compensation
US8027572B2 (en) 2008-02-22 2011-09-27 Baxter International Inc. Dialysis machine having multiple line voltage heater
US9435459B2 (en) 2009-06-05 2016-09-06 Baxter International Inc. Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7153286B2 (en) 2002-05-24 2006-12-26 Baxter International Inc. Automated dialysis system
DE102009041451B4 (de) * 2009-09-16 2012-03-15 Küster Holding GmbH Ansteuereinheit für elektrische und/oder pneumatische Verstellantriebe
DE102009044953B4 (de) 2009-09-24 2019-12-05 Robert Bosch Gmbh Verfahren zum Ansteuern eines elektromagnetischen Verbrauchers sowie entsprechende Schaltung
DE102022200152B4 (de) 2022-01-10 2023-08-24 Festo Se & Co. Kg Magnetaktuator, Ventilanordnung und Verfahren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910810A1 (de) 1989-04-04 1990-10-11 Luetze Gmbh Co F Schaltungsanordnung fuer ein elektromagnetisches ventil
DE4109233C2 (fr) 1991-03-21 1993-06-17 Mannesmann Rexroth Gmbh, 8770 Lohr, De
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4031427A1 (de) * 1990-10-04 1992-04-09 Luetze Gmbh Co F Verfahren und vorrichtung zum energiereduzierten betrieb eines elektromagnetischen stellgliedes
JP4803882B2 (ja) * 2001-01-19 2011-10-26 本田技研工業株式会社 電磁アクチュエータ制御装置
DE10104754A1 (de) * 2001-02-02 2002-08-08 Volkswagen Ag Verfahren zum Betreiben eines elektromagnetischen Ventils
US7054772B2 (en) * 2003-09-30 2006-05-30 Delphi Technologies, Inc. Apparatus and method for monitoring and compensating for variation in solenoid resistance during use

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910810A1 (de) 1989-04-04 1990-10-11 Luetze Gmbh Co F Schaltungsanordnung fuer ein elektromagnetisches ventil
DE4109233C2 (fr) 1991-03-21 1993-06-17 Mannesmann Rexroth Gmbh, 8770 Lohr, De
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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009105410A1 (fr) * 2008-02-22 2009-08-27 Baxter International Inc. Machine à fluide médical comportant un système de commande à solénoïde doté d’un courant de maintien réduit
US7746620B2 (en) 2008-02-22 2010-06-29 Baxter International Inc. Medical fluid machine having solenoid control system with temperature compensation
US7782590B2 (en) 2008-02-22 2010-08-24 Baxter International Inc. Medical fluid machine having solenoid control system with reduced hold current
US8027572B2 (en) 2008-02-22 2011-09-27 Baxter International Inc. Dialysis machine having multiple line voltage heater
US8160433B2 (en) 2008-02-22 2012-04-17 Baxter International, Inc. Dialysis machine having multi-input voltage capable heater
US8644692B2 (en) 2008-02-22 2014-02-04 Baxter International Inc. Method for heating medical fluid using multi-input voltage capable heater
US9435459B2 (en) 2009-06-05 2016-09-06 Baxter International Inc. Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production
US9782577B2 (en) 2009-06-05 2017-10-10 Baxter International Inc. Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production

Also Published As

Publication number Publication date
DE102006009628A1 (de) 2007-09-06
EP1830370B1 (fr) 2012-08-15
EP1830370A3 (fr) 2009-04-15

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