EP0225444B1 - Process for the control of an electromagnet - Google Patents

Process for the control of an electromagnet Download PDF

Info

Publication number
EP0225444B1
EP0225444B1 EP86113598A EP86113598A EP0225444B1 EP 0225444 B1 EP0225444 B1 EP 0225444B1 EP 86113598 A EP86113598 A EP 86113598A EP 86113598 A EP86113598 A EP 86113598A EP 0225444 B1 EP0225444 B1 EP 0225444B1
Authority
EP
European Patent Office
Prior art keywords
electromagnet
current
frequency
circuit
controlling
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.)
Expired - Lifetime
Application number
EP86113598A
Other languages
German (de)
French (fr)
Other versions
EP0225444A1 (en
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.)
Audi AG
Original Assignee
Audi AG
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 Audi AG filed Critical Audi AG
Publication of EP0225444A1 publication Critical patent/EP0225444A1/en
Application granted granted Critical
Publication of EP0225444B1 publication Critical patent/EP0225444B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/32—Energising current supplied by semiconductor device
    • H01H47/325—Energising current supplied by semiconductor device by switching regulator

Definitions

  • the invention relates to a method according to the preamble of claim 1. Furthermore, a circuit arrangement for carrying out the method is specified in claim 4.
  • the holding phase can only start when the armature has been reliably attracted by the magnet, since the holding current is sufficient to hold an armature that has been tightened in the working position, but not to attract the armature.
  • Circuits are therefore known which are based on measuring the current rise during the excitation of the coil and which detect a possibly occurring negative value of the first derivative of the current rise in order to derive a hit detection therefrom.
  • the functional reliability of such circuits has not proven itself, in particular they are heavily dependent on the supply voltage and, in particular, no longer function if the supply voltage increases.
  • This evaluation circuit is relatively complicated and requires fine measuring methods.
  • the object of the invention is to provide a method and a switching arrangement corresponding to the method, which enables reliable determination of whether the armature is an electromagnet in the working or in the rest position.
  • the invention is based on a clocked power supply in the holding phase for the electromagnet, wherein the supply current for the electromagnet is always switched off when it exceeds an upper limit value and is switched on again when it falls below a lower limit value.
  • the current flow does not suddenly increase due to the inductance of the magnet, and during the switch-off process it does not drop suddenly, a free-wheeling circuit being able to provide a longer maintenance of a current flow through the magnet.
  • the clock frequency is dependent on the supply voltage, the temperature of the coil and the inductance of the magnet.
  • the deviations in the clock frequency caused by temperature changes and also by the change in the supply voltage are negligibly small compared to the deviations caused by the changes in the inductance of the magnet due to the fact that the magnet has a significantly different inductance in the working state, i.e. with the armature plate attracted than in the rest position, in which the armature plate is spaced from the pole faces.
  • the change in the clock frequency caused thereby is evaluated, so that reliable detection is possible as to whether the magnet has attracted the armature plate or not.
  • FIG. 2 shows a circuit in which an electromagnetic consumer 10 has a freewheeling circuit 12 lying parallel to it, which is indicated by a diode.
  • This electromagnetic consumer 10 with its free-wheeling circuit 12 is connected to a supply voltage 14 on one side, the other side is connected at 16 to ground.
  • an output stage 18 or a switching element which is indicated here as a transistor, it is possible to let the current flow from the positive pole 14 through the electromagnetic consumer 10 to the ground connection 16. If the output stage 18 is blocked, the current flows from the coil 10 via its free-wheeling circuit 12.
  • a measuring resistor 26 is provided in the freewheeling circuit 10, 12, from which information about the current strength is tapped via a line 24. This information is fed to a control circuit 22, which also receives external control signals via an input 20.
  • the rising phase is designated with the letter A
  • the falling phase with the letter B.
  • the duration of the interval A + B determines the frequency of the clocking.
  • This frequency value can be tapped at the output of the control circuit 22, there even as a clean square-wave signal, and is fed to a frequency measuring element 30.
  • the frequency measuring element 30 detects this frequency and compares it with a predetermined reference value, and if the actual value deviates too much from the target value, the frequency element 30 emits an error signal to the control circuit 22.
  • Fig. 1 the curves for the frequency of the clock current for the electromagnetic consumption 10 for the two different positions of the anchor plate are shown and designated by the letters K 1 and K 2 .
  • K 1 and K 2 the curves for the frequency of the clock current for the electromagnetic consumption 10 for the two different positions of the anchor plate are shown and designated by the letters K 1 and K 2 .
  • a comparison makes it easy to see that the frequency of the curves undergoes a significant change depending on whether the anchor plate is tightened or not.
  • the frequency change is up to 50%, so that there is a significant and easily evaluable value to determine whether the anchor plate has been tightened or not.
  • a signal is generated in the control circuit 22, which has received this information from the frequency measuring element 30, and a new switch-on process is started.
  • a first switch-on current with a high amplitude is generated, while the current strength of the subsequent holding current can be significantly lower and has a current strength that is only about 20% of the maximum switch-on current.
  • the circuit according to the invention can be used to control a gas exchange valve of an internal combustion engine, which is held in its end positions by electromagnetic force.
  • the working position of the armature corresponds to an excited magnet that holds the gas exchange valve in the open position
  • the second work position corresponds to the excitation of a second magnet that holds the gas exchange valve in the closed position. Since a malfunction would result in the combustion process failing, immediate and reliable detection is essential. As soon as a failure of the system is reported by the function monitoring according to the invention, a restart is initiated in order to bring the gas exchange valve into the intended working position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Valve Device For Special Equipments (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Electromagnets (AREA)
  • Relay Circuits (AREA)

Description

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruches 1. Weiterhin wird in Anspruch 4 eine Schaltungsanordnung zur Durchführung des Verfahrens vorgegeben.The invention relates to a method according to the preamble of claim 1. Furthermore, a circuit arrangement for carrying out the method is specified in claim 4.

Es ist bekannt, zur Energieeinsparung einen in Haltephase befindlichen Elektromagneten mit einer getakteten Stromversorgung anzusteuern, wobei jeweils während des abgeschalteten Stromes eine Freilaufschaltung für den Stromdurchfluß durch den Elektromagneten sorgen kann. Eine derartige Schaltung kann beispielsweise der DE-OS 24 25 585 entnommen werden.It is known to control an electromagnet which is in the holding phase with a clocked power supply in order to save energy, a free-wheeling circuit being able to ensure the current flow through the electromagnet during the current being switched off. Such a circuit can be found, for example, in DE-OS 24 25 585.

Dabei existiert jedoch das Problem, daß die Haltephase erst dann anlaufen kann, wenn der Anker zuverlässig vom Magneten angezogen wurde, da der Haltestrom zwar ausreichend ist, um einen einmal angezogenen Anker in der Arbeitsstellung zu halten, jedoch nicht, um den Anker anzuziehen.However, there is the problem that the holding phase can only start when the armature has been reliably attracted by the magnet, since the holding current is sufficient to hold an armature that has been tightened in the working position, but not to attract the armature.

Es sind deshalb Schaltungen bekannt, die darauf aufbauen, den Stromanstieg während der Erregung der Spule zu messen und einen eventuell auftretenden negativen Wert der ersten Ableitung des Stromanstiegs erfassen, um daraus eine Auftrefferkennung abzuleiten. Die Funktionssicherheit derartiger Schaltungen jedoch hat sich nicht bewährt, insbesondere sind sie stark von der Versorgungsspannung abhängig und funktionieren insbesondere bei einem Anstieg der Versorgungsspannung nicht mehr.Circuits are therefore known which are based on measuring the current rise during the excitation of the coil and which detect a possibly occurring negative value of the first derivative of the current rise in order to derive a hit detection therefrom. However, the functional reliability of such circuits has not proven itself, in particular they are heavily dependent on the supply voltage and, in particular, no longer function if the supply voltage increases.

Aus der DE-OS 33 26 605 ist eine Schaltung bekannt, mit der die Hublage des Ankers überwacht wird. Dabei wird ausgegangen von einer Spannungsversorgung für den Elektromagneten, die aus einem Gleichstrom mit einem überlagerten Wechselstromanteil besteht. Durch eine Auswertung der Größe des Wechselstromanteils, der sich durch die unterschiedliche Induktivität des Elektromagneten mit angezogener und beabstandeter Ankerplatte unterscheidet, soll erfaßt werden, ob der Elektromagnet die Ankerplatte angezogen hat.From DE-OS 33 26 605 a circuit is known with which the stroke position of the armature is monitored. A voltage supply for the electromagnet is assumed, which consists of a direct current with a superimposed alternating current component. An evaluation of the size of the AC component, which differs in the different inductance of the electromagnet with the armature plate attracted and spaced apart, is intended to determine whether the electromagnet has attracted the armature plate.

Diese Auswertschaltung ist verhältnismäßig kompliziert und bedarf feiner Meßmethoden.This evaluation circuit is relatively complicated and requires fine measuring methods.

Aufgabe der Erfindung ist es, ein Verfahren und eine dem Verfahren entsprechende Schaltanordnung anzugeben, das zuverlässig ermöglicht festzustellen, ob der Anker eine Elektromagneten sich in der Arbeits- oder in der Ruhestellung befindet.The object of the invention is to provide a method and a switching arrangement corresponding to the method, which enables reliable determination of whether the armature is an electromagnet in the working or in the rest position.

Die Aufgabe wird durch die Ansprüche 1 und 4 gelöst.The object is solved by claims 1 and 4.

Die Erfindung geht von einer getakteten Stromversorgung in der Haltephase für den Elektromagneten aus, wobei der Versorgungsstrom für den Elektromagneten stets dann abgeschaltet wird, wenn er einen oberen Grenzwert überschreitet, und wiederum eingeschaltet wird, wenn er einen unteren Grenzwert unterschreitet. Während des Einschaltvorganges steigt der Stromfluß aufgrund der Induktivität des Magneten nicht schlagartig an, und während des Abschaltvorganges fällt er nicht schlagartig ab, wobei eine Freilaufschaltung für eine längere Aufrechterhaltung eines Stromdurchflusses durch den Magneten sorgen kann.The invention is based on a clocked power supply in the holding phase for the electromagnet, wherein the supply current for the electromagnet is always switched off when it exceeds an upper limit value and is switched on again when it falls below a lower limit value. During the switch-on process, the current flow does not suddenly increase due to the inductance of the magnet, and during the switch-off process it does not drop suddenly, a free-wheeling circuit being able to provide a longer maintenance of a current flow through the magnet.

Da die Regelung für die Stromversorgung von einem oberen Grenzwert und einem unteren Grenzwert abhängig ist, gehen in die sich ausbildende Taktfrequenz verschiedene Faktoren ein.Since the regulation for the power supply is dependent on an upper limit value and a lower limit value, various factors are included in the clock frequency that is formed.

So ist die Taktfrequenz abhängig von der Versorgungsspannung, von der Temperatur der Spule und von der Induktivität des Magneten.The clock frequency is dependent on the supply voltage, the temperature of the coil and the inductance of the magnet.

Überraschenderweise sind die durch Temperaturänderungen und auch durch die Änderung der Versorgungsspannung hervorgerufenen Abweichungen in der Taktfrequenz vernachlässigbar klein gegenüber den Abweichungen, die durch die Induktivitätsänderungen des Magneten hervorgerufen werden aufgrund der Tatsache, daß der Magnet im Arbeitszustand, also mit angezogener Ankerplatte eine deutlich andere Induktivität besitzt als in Ruhestellung, in dem die Ankerplatte von den Polflächen beabstandet ist.Surprisingly, the deviations in the clock frequency caused by temperature changes and also by the change in the supply voltage are negligibly small compared to the deviations caused by the changes in the inductance of the magnet due to the fact that the magnet has a significantly different inductance in the working state, i.e. with the armature plate attracted than in the rest position, in which the armature plate is spaced from the pole faces.

Erfindungsgemäß wird die dadurch hervorgerufene Änderung der Taktfrequenz ausgewertet, so daß die zuverlässige Erkennung möglich ist, ob der Magnet die Ankerplatte angezogen hat oder nicht.According to the invention, the change in the clock frequency caused thereby is evaluated, so that reliable detection is possible as to whether the magnet has attracted the armature plate or not.

Weitere Ausführungsformen sind in den Unteransprüchen beschrieben.Further embodiments are described in the subclaims.

Im folgenden wird die Erfindung anhand der Zeichnung erläutert.The invention is explained below with reference to the drawing.

Es zeigen:

  • Fig. 1 eine graphische Darstellung des zeitlichen Stromverlaufes zur Erläuterung der Erfindung; und
  • Fig. 2 eine Schaltung zur Durchführung des Verfahrens.
Show it:
  • Figure 1 is a graphical representation of the current profile over time to explain the invention. and
  • Fig. 2 shows a circuit for performing the method.

In Fig. 2 ist eine Schaltung dargestellt, in der ein elektromagnetischer Verbraucher 10 eine parallel dazu liegende Freilaufschaltung 12 besitzt, was durch eine Diode angedeutet ist. Dieser elektromagnetische Verbraucher 10 mit seiner Freilaufschaltung 12 ist an einer Versorgungsspannung 14 mit seiner einen Seite angeschlossen, die andere Seite ist bei 16 mit Masse verbunden.FIG. 2 shows a circuit in which an electromagnetic consumer 10 has a freewheeling circuit 12 lying parallel to it, which is indicated by a diode. This electromagnetic consumer 10 with its free-wheeling circuit 12 is connected to a supply voltage 14 on one side, the other side is connected at 16 to ground.

Durch das Öffnen einer Endstufe 18 oder eines Schaltglieds, die hier als Transistor angedeutet ist, ist es möglich, den Strom vom Pluspol 14 durch den elektromagnetischen Verbraucher 10 zum Masseanschluß 16 fließen zu lassen. Ist die Endstufe 18 gesperrt, fließt der Strom von der Spule 10 über seine Freilaufschaltung 12.By opening an output stage 18 or a switching element, which is indicated here as a transistor, it is possible to let the current flow from the positive pole 14 through the electromagnetic consumer 10 to the ground connection 16. If the output stage 18 is blocked, the current flows from the coil 10 via its free-wheeling circuit 12.

Im Freilaufkreis 10, 12 ist ein Meßwiderstand 26 vorgesehen, an dem über eine Leitung 24 eine Information über die Stromstärke abgegriffen wird. Diese Information wird einer Regelungsschaltung 22 zugeführt, die außerdem über einen Eingang 20 externe Steuersignale erhält.A measuring resistor 26 is provided in the freewheeling circuit 10, 12, from which information about the current strength is tapped via a line 24. This information is fed to a control circuit 22, which also receives external control signals via an input 20.

Zur Diskussion der Beschaltung des elektromagnetischen Verbrauchers 10 wird auf Fig. 1 zurückgegriffen. Wenn der Anker des Elektromagneten 10 sich in seiner angezogenen Stellung befindet, ist es zum Halten des Ankers notwendig, einen gewissen Haltestrom fließen zu lassen, wobei der Haltestrom zwischen einem oberen Stromwert 11, und einem unteren Stromwert 12 schwanken kann. Wird also die Endstufe 18 geöffnet, steigt der Strom an, bis er den Wert 11 erreicht hat. In diesem Fall sperrt die Regelungseinheit 22 die Endstufe 18, so daß der Strom nicht weiter ansteigen kann, sondern durch die Freilaufschaltung 12 abfließt. Dabei fällt jedoch die Stromstärke ab, abhängig von einigen Parametern, wobei die Induktivität des Elektromagneten 10 in einem Maße eingeht, daß die übrigen Parameter vernachlässigbar sind. Dies ist insbesondere darauf zurückzuführen, daß die übrigen Parameter wie Versorgungsspannung den Stromanstiegsteil der Kurve beeinflussen, dessen Anteil an einer Frequenzperiode in der Regel kleiner als 25 % ist. Die Zeitdauer des wesentlich längeren abfallenden Teils wird im wesentlichen durch die Induktivität bestimmt. Hat der Strom den unteren Wert 12 erreicht, steuert die Regelung 22 über eine Treiberstufe 28 die Endstufe 18 wiederum an, so daß der Strom wieder auf den Wert 11 ansteigen kann.1 is used to discuss the wiring of the electromagnetic consumer 10. When the armature of the electromagnet 10 is in its attracted position, it is necessary to let a certain holding current flow in order to hold the armature, the holding current being able to fluctuate between an upper current value 1 1 and a lower current value 1 2 . If the output stage 18 is opened, the current increases until it reaches the value 11. In this case, the control unit 22 blocks the output stage 18, so that the Current can not continue to rise, but flows through the freewheeling circuit 12. However, the current intensity drops, depending on some parameters, the inductance of the electromagnet 10 being taken into account to such an extent that the other parameters are negligible. This is due in particular to the fact that the other parameters such as supply voltage influence the current rise part of the curve, the proportion of which in a frequency period is generally less than 25%. The duration of the much longer falling part is essentially determined by the inductance. If the current has reached the lower value 1 2 , the controller 22 in turn controls the output stage 18 via a driver stage 28, so that the current can rise again to the value 11.

In Fig. 1 ist die Anstiegsphase mit dem Buchstaben A bezeichnet, die abfallende Phase mit dem Buchstaben B. Die Zeitdauer des Intervalls A + B bestimmt die Frequenz der Taktung.In Fig. 1, the rising phase is designated with the letter A, the falling phase with the letter B. The duration of the interval A + B determines the frequency of the clocking.

Dieser Frequenzwert ist am Ausgang der Regelschaltung 22, dort sogar als sauberes Rechtecksignal, abgreifbar und wird einem Frequenzmeßglied 30 zugeführt. Das Frequenzmeßglied 30 erfaßt diese Frequenz und vergleicht sie mit einem vorgegebenen Referenzwert, und bei einer allzu großen Abweichung des Ist-Wertes vom Soll-Wert gibt das Frequenzglied 30 ein Fehlersignal an die Regelschaltung 22 ab.This frequency value can be tapped at the output of the control circuit 22, there even as a clean square-wave signal, and is fed to a frequency measuring element 30. The frequency measuring element 30 detects this frequency and compares it with a predetermined reference value, and if the actual value deviates too much from the target value, the frequency element 30 emits an error signal to the control circuit 22.

In Fig. 1 sind die Kurven für die Frequenz des Taktstromes für den elektromagnetischen Verbrauch 10 für die beiden verschiedenen Stellungen der Ankerplatte dargestellt und mit den Buchstaben K1 und K2 bezeichnet. Ein Vergleich läßt unschwer erkennen, daß die Frequenz der Kurven eine deutliche Änderung erfährt, je nach dem, ob die Ankerplatte angezogen ist oder nicht. Die Frequenzänderung beträgt dabei bis zu 50 %, so daß hier ein signifikanter und leicht auswertbarer Wert vorliegt, um festzustellen, ob die Ankerplatte angezogen wurde oder nicht.In Fig. 1, the curves for the frequency of the clock current for the electromagnetic consumption 10 for the two different positions of the anchor plate are shown and designated by the letters K 1 and K 2 . A comparison makes it easy to see that the frequency of the curves undergoes a significant change depending on whether the anchor plate is tightened or not. The frequency change is up to 50%, so that there is a significant and easily evaluable value to determine whether the anchor plate has been tightened or not.

Ergibt die Auswertung der Frequenz, daß die Ankerplatte nicht angezogen ist, wird in der Regelschaltung 22, die diese Information von dem Frequenzmeßglied 30 erhalten hat, ein Signal erzeugt, und ein erneuter Einschaltvorgang in Gang gesetzt. Beim Einschaltvorgang wird ein erster Einschaltstrom mit hoher Amplitude erzeugt, während die Stromstärke des anschließenden Haltestromes deutlich geringer sein kann und eine Stromstärke hat, die nur etwa 20 % des maximalen Einschaltstromes beträgt.If the evaluation of the frequency reveals that the armature plate is not tightened, a signal is generated in the control circuit 22, which has received this information from the frequency measuring element 30, and a new switch-on process is started. During the switch-on process, a first switch-on current with a high amplitude is generated, while the current strength of the subsequent holding current can be significantly lower and has a current strength that is only about 20% of the maximum switch-on current.

Die erfindungsgemäße Schaltung kann verwendet werden, um ein Gaswechselventil einer Brennkraftmaschine, das in seinen Endlagen durch elektromagnetische Kraft gehalten ist, anzusteuern. Die Arbeitslage des Ankers entspricht einem erregten Magneten, der das Gaswechselventil in Öffnungsstellung hält, die zweite Arbeitslage entspricht der Erregung eines zweiten Magneten, der das Gaswechselventil in Schließstellung hält. Da hier eine Fehlfunktion zum Ausfall des Verbrennungsvorganges führen würde, ist die sofortige und zuverlässige Erkennung wesentlich. Sobald durch die erfindungsgemäße Funktionsüberwachung ein Ausfall des Systems gemeldet wird, wird ein Neustart veranlaßt, um das Gaswechselventil in die beabsichtigte Arbeitsstellung zu bringen.The circuit according to the invention can be used to control a gas exchange valve of an internal combustion engine, which is held in its end positions by electromagnetic force. The working position of the armature corresponds to an excited magnet that holds the gas exchange valve in the open position, the second work position corresponds to the excitation of a second magnet that holds the gas exchange valve in the closed position. Since a malfunction would result in the combustion process failing, immediate and reliable detection is essential. As soon as a failure of the system is reported by the function monitoring according to the invention, a restart is initiated in order to bring the gas exchange valve into the intended working position.

Claims (5)

1. Method for controlling an electromagnet (10) which attracts an armature, in which the electromagnet (10) in its holding phase is controlled with pulsed current from a power supply, the current being switched off when an upper threshold value is exceeded and is switched on when it falls below a lower threshold value, characterized in that the frequency of the pulsing is measured during the holding phase and compared with a preset frequency value, and an error signal is initiated when a maximum deviation is exceeded.
2. Method according to claim 1, in which a larger excitation current flows through the electromagnet at the start of the controlling phase followed by a smaller holding current, characterized in that the controlling process is started again on initiation of the error signal.
3. Method according to Claims 1 or 2, characterized in that the maximum deviation is approximately 20%.
4. Circuit configuration for carrying out the method according to one of Claims 1 to 3 for controlling an electromagnet (10) with pole faces and an armature plate which is at a distance when the magnet is in a disconnected state and is moved towards the pole faces in the excited state, a free-wheeling circuit (12) parallel to the electromagnet, a switching device (18) which controls the current in the electromagnet (10), a control circuit (22) which controls the switching device (18) to the pulsed power supply during the holding phase of the electromagnet (10), characterized in that a frequency-measuring element (30) is provided which measures the frequency of the pulsed current and controls the control circuit (22) and/or re-activates the magnet system.
5. Circuit configuration according to claim 4, characterized in that the frequency-measuring element (30) picks off the frequency at the output from the control circuit (22).
EP86113598A 1985-12-05 1986-10-02 Process for the control of an electromagnet Expired - Lifetime EP0225444B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3543055A DE3543055C1 (en) 1985-12-05 1985-12-05 Circuit arrangement for driving an electromagnet
DE3543055 1985-12-05

Publications (2)

Publication Number Publication Date
EP0225444A1 EP0225444A1 (en) 1987-06-16
EP0225444B1 true EP0225444B1 (en) 1990-10-24

Family

ID=6287740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113598A Expired - Lifetime EP0225444B1 (en) 1985-12-05 1986-10-02 Process for the control of an electromagnet

Country Status (5)

Country Link
EP (1) EP0225444B1 (en)
JP (1) JPS62134911A (en)
CA (1) CA1276679C (en)
DE (2) DE3543055C1 (en)
ES (1) ES2018147B3 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701985A1 (en) * 1987-01-23 1988-08-04 Knorr Bremse Ag Ballast electronics for an apparatus which can be energised by DC voltage
DE3703089A1 (en) * 1987-02-03 1988-08-11 Vdo Schindling Method and arrangement for operating an electromechanical actuating element (servo element)
DE3741734C2 (en) * 1987-12-09 1996-09-26 Herion Werke Kg Device for measuring the inductance of a coil, in particular for measuring the armature position of a coil / armature magnet system
US5038247A (en) * 1989-04-17 1991-08-06 Delco Electronics Corporation Method and apparatus for inductive load control with current simulation
US5053911A (en) * 1989-06-02 1991-10-01 Motorola, Inc. Solenoid closure detection
DE3923477A1 (en) * 1989-07-15 1991-01-24 Fev Motorentech Gmbh & Co Kg METHOD FOR CONTROLLING THE ANCHOR MOTION OF SHIFTING MAGNETS
GB9006973D0 (en) * 1990-03-28 1990-05-23 Vickers Systems Ltd Digital pulse-width-modulation generator for current control
US5243296A (en) * 1990-11-06 1993-09-07 Tokimec Inc. Method and apparatus for checking operation of solenoid
DE4130040A1 (en) * 1991-09-10 1993-03-11 Heidelberger Druckmasch Ag CIRCUIT ARRANGEMENT FOR MONITORING AN ELECTROMAGNETICALLY ACTUATED CLUTCH
GB2260030A (en) * 1991-09-14 1993-03-31 Kloeckner Humboldt Deutz Ag Control systems for electromagnetic valves
IT1263110B (en) * 1992-03-24 1996-07-30 Magneti Marelli Spa STARTING SYSTEM FOR AN INTERNAL COMBUSTION AND SOLENOID ENGINE USABLE IN SUCH STARTING SYSTEM
GB2306679B (en) * 1995-11-03 2000-05-17 Motorola Ltd Method for detecting closure of a solenoid coil
DE19623436A1 (en) * 1996-06-12 1997-12-18 Rapp Franz Josef Apparatus for displaying performance of electromagnetic (EM) relay or valve
US5784245A (en) * 1996-11-27 1998-07-21 Motorola Inc. Solenoid driver and method for determining solenoid operational status
WO1999046783A1 (en) * 1998-03-11 1999-09-16 Btr Industries Limited Control of electrically powered actuation device
DE19821804C1 (en) * 1998-05-15 1999-08-12 Daimler Chrysler Ag Method of functional monitoring of an electromagnetically actuated gas changeover valve
IT1321161B1 (en) 2000-03-24 2003-12-30 Magneti Marelli Spa METHOD FOR THE ADJUSTMENT OF CURRENTS DURING STATIONING PHASES ELECTROMAGNETIC INACTORS FOR THE ACTIVATION OF VALVES OF
DE10302988B3 (en) * 2003-01-25 2004-10-28 Festo Ag & Co. Circuit device for generating a coil current flowing through a magnet coil arrangement and regulated by clocking
DE10358858A1 (en) 2003-12-16 2005-07-14 Robert Bosch Gmbh Method and device for operating an inductive load with different electrical voltages
US7527002B2 (en) * 2004-07-07 2009-05-05 Cwa Constructions S.A. Cableway cabin

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2102595A1 (en) * 1971-01-20 1972-08-03 Siemens Ag Circuit arrangement for an electromagnet that can be controlled via an amplifier
DE2208135C3 (en) * 1972-02-22 1975-04-17 Voith Getriebe Kg, 7920 Heidenheim Operating circuit for an electromagnet
DE2251472C3 (en) * 1972-10-20 1983-11-10 Robert Bosch Gmbh, 7000 Stuttgart Circuit arrangement for controlling the mechanical movement of a solenoid valve armature
DD106243A1 (en) * 1973-07-19 1974-06-05
DE2601799A1 (en) * 1976-01-20 1977-07-21 Licentia Gmbh Switch for electromagnetic contact actuation - has sensor in contactor electromagnetic range whose signals affect electronic switching element
US4123729A (en) * 1977-07-22 1978-10-31 General Motors Corporation Displacement transducer
DE3326605A1 (en) * 1983-07-23 1985-02-07 Binder Magnete GmbH, 7730 Villingen-Schwenningen Method and circuit arrangement for monitoring the stroke position of the armature of a lifting electromagnet, in particular a valve magnet

Also Published As

Publication number Publication date
CA1276679C (en) 1990-11-20
ES2018147B3 (en) 1991-04-01
EP0225444A1 (en) 1987-06-16
JPH0368522B2 (en) 1991-10-28
DE3543055C1 (en) 1986-12-11
DE3675167D1 (en) 1990-11-29
JPS62134911A (en) 1987-06-18

Similar Documents

Publication Publication Date Title
EP0225444B1 (en) Process for the control of an electromagnet
EP0449852B1 (en) Process and device for controlling and detecting the movement of an armature of an electromagnetic switching device
EP0205807B1 (en) Control process and system for an electromagnetic engine valve
DE3942836C2 (en)
DE3730523C2 (en)
DE19533452B4 (en) Method for adapting a control for an electromagnetic actuator
DE4237706C2 (en) Device for detecting the time of impact for the armature of a solenoid valve
DE19742038A1 (en) Solenoid valve state detection method
DE2805876C2 (en)
DE4322199C2 (en) Method and device for controlling an electromagnetic consumer
DE3508608C2 (en)
DE19742037B4 (en) Method for detecting the waste of a magnetically operated device
DE19526038A1 (en) Electromagnetic switch-fuse and control method
CH659345A5 (en) ELECTRONIC CIRCUIT ARRANGEMENT FOR CONTROLLING AN ELECTROMAGNETIC COMPONENT.
DE19880737B4 (en) Method for monitoring the function of an electromagnetic actuator
DE102010043306B4 (en) Method for operating a magnetic switching element, electrical circuit for operating the magnetic switching element and a control and/or regulating device
EP1234316B1 (en) Electromagnetic switchgear comprising a controlled drive, a corresponding method and a circuit
DE3543017C1 (en) Circuit arrangement for the periodic control of an electromagnet
EP2884233B1 (en) Measuring of parameters in an electromagnetic drive of a switching device
EP0575792B1 (en) Method and device for driving an electromagnetic switch
WO2008090047A1 (en) Device and method for controlling an electromagnetic valve
DE4242432A1 (en) Control of electromagnetic valve, solenoid rotary electromagnet or relay
EP0880787B1 (en) Control device for an internal combustion engine
DE102018218799B4 (en) Actuator device, valve device and method for detecting a position of an actuator
DE10134346A1 (en) Device for controlling an electromagnet

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19871203

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AUDI AG

17Q First examination report despatched

Effective date: 19900223

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 3675167

Country of ref document: DE

Date of ref document: 19901129

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 86113598.6

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20031010

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040831

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20041008

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20041020

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20041026

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051002

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051003

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051003

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20051002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060630

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20051003