EP1203389B1 - Circuitry for an electromagnetic switchgear - Google Patents

Circuitry for an electromagnetic switchgear Download PDF

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Publication number
EP1203389B1
EP1203389B1 EP00963898A EP00963898A EP1203389B1 EP 1203389 B1 EP1203389 B1 EP 1203389B1 EP 00963898 A EP00963898 A EP 00963898A EP 00963898 A EP00963898 A EP 00963898A EP 1203389 B1 EP1203389 B1 EP 1203389B1
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EP
European Patent Office
Prior art keywords
current
circuit
drive coil
switching
energy store
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EP00963898A
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German (de)
French (fr)
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EP1203389A1 (en
Inventor
Norbert Mitlmeier
Bernhard Streich
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Siemens AG
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Siemens AG
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    • 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
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
    • H01H47/043—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current making use of an energy accumulator

Definitions

  • the present invention relates to a circuit for a electromagnetic switching device with at least one drive coil, the one when a pulling current is applied Contact arrangement of the electromagnetic switching device actuated and when subsequently subjected to a holding current, which is smaller than the pull-in current, the contact arrangement keeps pressed, with a current limiter on the input side with a power supply and on the output side with the Drive coil is connected and outputs a limiter current.
  • Electromagnetic switching devices i.e. contactors and relays, take a high power supply when switching on Starting current.
  • the pull-in current is, among other things, from the one present Supply voltage dependent.
  • the electromagnetic switching device a current limiter to subordinate the starting current regardless of the supply voltage to the minimum possible Value limited. Nevertheless, this is still minimal Starting current required, which has a very high value. Especially with large shooters due to the high Current pollution can even affect the grid.
  • the object of the present invention is a To create circuitry for an electromagnetic switching device, with which on the one hand the drive coil with certainty the required starting current can be supplied, on the other hand the current drawn from the power supply is considerably lower is.
  • the task is based on the state described at the beginning the technology - solved in that the limiter current is smaller than the starting current is that between the current limiter and the drive coil, an energy storage device is arranged and that a switching element between the energy store and the drive coil is arranged, the energy content of the energy storage recorded and the energy storage only on the Drive coil turns on when the energy storage with a sufficient for actuating the contact arrangement Energy content is applied.
  • the load on the power supply is less than the starting current relatively low. Because of the storage of energy in the energy storage is the one for switching the switching device required energy available. Because of the switching element prevents the stored energy from becoming one Time is switched through to the drive coil at which no safe switching of the switching device is guaranteed yet is.
  • the energy store can be of any type.
  • an electrical energy storage is used, thus an accumulator or in particular a capacitor.
  • the operational safety of the electromagnetic switching device is increased significantly when the energy storage device reaches a maximum Has energy content and the maximum energy content for at least two successive actuations of the contact arrangement sufficient.
  • the wiring is universal for various electromagnetic switching devices can be used which require different holding currents.
  • the limiter current can be set such that that it is slightly larger than the holding current.
  • the adjustability of the limiter current can, for example can be achieved in that the current limiter is a charging switching element with adjustable switching ratio.
  • the switching ratio can be set, for example done by pulse width modulation.
  • the charging switching element has a choke with an anti-parallel is connected upstream free-wheeling diode No abrupt changes in current on the supply side.
  • the circuit is for different electromagnetic switching devices with different Tightening currents adjustable.
  • a switching signal can be supplied to the switching element is and the switching element only the energy storage
  • the switching signal is applied to the drive coil, it is possible to pre-charge the energy storage and when the switching signal is present, the contact arrangement immediately to operate.
  • the wiring is universal both when supplying with Can be used both directly and with AC power.
  • the electromagnetic switching device 1 shows an electromagnetic switching device 1 Drive coil 2 and a contact arrangement 3.
  • the electromagnetic switching device 1 is the electromagnetic switching device 1 as Contactor trained. But it could also be designed as a relay his.
  • the contact arrangement 3 When a drive current 2 A is applied to the drive coil 2, the contact arrangement 3 is actuated. After the contact arrangement 3 has been actuated, the drive coil 2 can be subjected to a holding current I H which is smaller than the starting current I A in order to keep the contact arrangement 3 actuated. If the drive coil 2 is supplied with a current which is less than the holding current I H , the contact arrangement 3 changes into the unactuated state. A renewed actuation of the contact arrangement 3 is then only possible again by applying the starting current I A to the drive coil 2.
  • the switching device 1 is preceded by a coil current control 4 which regulates the current flowing through the drive coil 2 to the starting current I A , the holding current I H or zero. Without further measures, the circuit described so far would nevertheless cause a high current load of a supply network with the starting current I A when the contact arrangement 3 is actuated.
  • the coil current control 4 upstream of a current limiter 5.
  • the current limiter 5 is connected on the input side to a power supply, which has a supply voltage U: output side is the current limiter 5 on other components which will be discussed in more detail below with the coil current control 4 and thus indirectly connected to the drive coil 2.
  • the current limiter 5 is controlled in such a way that it outputs a limiter current I L which is less than the starting current I A.
  • the limiter current I L is slightly larger than the holding current I H , e.g. B. five to 10 percent larger.
  • the limiter current I L is used to charge an energy store 6, which is arranged between the current limiter 5 and the drive coil 2 or the coil current control 4. According to FIG. 1, the energy store 6 is designed as a storage capacitor 6.
  • a switching element 7 is arranged in the coil current control 4.
  • the energy content of the energy store 6 detected.
  • the switching element 7 then switches the energy storage device 6 to the drive coil 2 or the coil current control 4 by when the energy storage 6 is acted upon with an energy content that for a Operating the contact arrangement 3 is sufficient.
  • the energy store 6 When the energy store 6 is designed as a storage capacitor 6, the energy content of the energy store 6 is given directly by the capacitance of the storage capacitor 6 and a storage voltage U s dropping across the storage capacitor 6. In this case, only the memory voltage must U s to an externally predetermined and adjustable switching threshold U S * compared. In this case, the switching element 7 switches the energy store 6 through to the drive coil 2 when the storage voltage U s is greater than or equal to the switching threshold U s *.
  • the circuit is connected to a supply voltage U supplied.
  • the maximum energy content of the energy storage 6 is in training as a storage capacitor 6 thus by its capacity and the supply voltage U certainly.
  • the capacitance of the storage capacitor is preferably 6 dimensioned such that the energy content of the storage capacitor 6 for at least two successive ones Actuations of the contact arrangement 3 is sufficient.
  • the current limiter 5 has a charging switching element 8 which is controlled by a control circuit 9.
  • the charging switching element 8 is thus switched through and blocked alternately.
  • the ratio between switching time and blocking time indicates the switching ratio.
  • the switching ratio can be set, for example, by pulse width modulation.
  • a choke 10 is arranged upstream of the current limiter 5.
  • the Choke 10 is connected in parallel with a freewheeling diode 11. This results in a more even current load on the Supply network because the choke limits current changes.
  • the switching device 1 is actuated by applying the supply voltage U.
  • the switching device 1 is actuated by applying the supply voltage U.
  • the switching element 7 only switches the energy store 6 through to the drive coil 2 or the coil current control 4 when both the energy store 6 has sufficient energy content and the switch-through signal S is present. In this case, it is possible to pre-charge the energy store 6.
  • the current limiter 5 together with choke 10 and Free-wheeling diode 11, a rectifier 12 with a backup capacitor 13 upstream.
  • the wiring is optionally available with DC voltage or can be supplied with AC voltage.
  • the coil current control 4 described in connection with FIG. 1 can be omitted. This is because after the energy store 6 has been discharged, the current supplied to the drive coil 2 inevitably drops to the limiter current I L. If the limiter current I L is slightly larger than the holding current I H and the energy content of the energy store 6 is dimensioned sufficiently small, the current limiter 5 also acts as a coil current control. A separate coil current control 4 is then no longer necessary.

Description

Die vorliegende Erfindung betrifft eine Beschaltung für ein elektromagnetisches Schaltgerät mit mindestens einer Antriebsspule, die bei Beaufschlagung mit einem Anzugsstrom eine Kontaktanordnung des elektromagnetischen Schaltgeräts betätigt und bei nachfolgender Beaufschlagung mit einem Haltestrom, der kleiner als der Anzugsstrom ist, die Kontaktanordnung betätigt hält, mit einem Strombegrenzer, der eingangsseitig mit einer Stromversorgung und ausgangsseitig mit der Antriebsspule verbunden ist und einen Begrenzerstrom ausgibt.The present invention relates to a circuit for a electromagnetic switching device with at least one drive coil, the one when a pulling current is applied Contact arrangement of the electromagnetic switching device actuated and when subsequently subjected to a holding current, which is smaller than the pull-in current, the contact arrangement keeps pressed, with a current limiter on the input side with a power supply and on the output side with the Drive coil is connected and outputs a limiter current.

Derartige Beschaltungen sind allgemein bekannt.Such circuits are generally known.

Elektromagnetische Schaltgeräte, also Schütze und Relais, entnehmen einem Stromversorgung beim Einschalten einen hohen Anzugsstrom. Der Anzugsstrom ist unter anderem von der anliegenden Versorgungsspannung abhängig. Im Stand der Technik ist bekannt, dem elektromagnetischen Schaltgerät einen Strombegrenzer vorzuordnen, der den Anzugsstrom unabhängig von der anliegenden Versorgungsspannung auf den minimal möglichen Wert begrenzt. Dennoch aber wird nach wie vor dieser minimale Anzugsstrom benötigt, der einen sehr hohen Wert aufweist. Insbesondere bei großen Schützen sind aufgrund der hohen Strombelastung sogar Netzrückwirkungen möglich.Electromagnetic switching devices, i.e. contactors and relays, take a high power supply when switching on Starting current. The pull-in current is, among other things, from the one present Supply voltage dependent. In the prior art known, the electromagnetic switching device a current limiter to subordinate the starting current regardless of the supply voltage to the minimum possible Value limited. Nevertheless, this is still minimal Starting current required, which has a very high value. Especially with large shooters due to the high Current pollution can even affect the grid.

Aus der US-A 4,716,490 ist eine Beschaltung für ein elektromagnetisches Schaltgerät mit einer Antriebsspule bekannt. Bei Beaufschlagen mit einem Anzugsstrom betätigt die Antriebsspule ein Ventil einer Bewässerungseinrichtung und hält es bei nachfolgender Beaufschlagung mit einem Haltestrom, der kleiner als der Anzugsstrom ist, im betätigten Zustand. Die Beschaltung weist einen Strombegrenzer auf, der eingangsseitig mit einer Stromversorgung und ausgangsseitig mit einer Antriebsspule verbunden ist. Er gibt einen Begrenzerstrom aus, der kleiner als der Anzugsstrom ist. Zwischen dem Strombegrenzer und der Antriebsspule ist ein Energiespeicher angeordnet, zwischen dem Energiespeicher und der Antriebsspule ein Durchschaltelement. Das Durchschaltelement schaltet den Energiespeicher verzögert auf die Antriebsspule durch. Dadurch erfolgt das Durchschalten in der Regel erst, wenn der Energiespeicher mit einem für ein Betätigen des Ventils ausreichenden Energieinhalt beaufschlagt ist.From US-A 4,716,490 is a circuit for an electromagnetic Switchgear known with a drive coil. at Applying a pull-in current actuates the drive coil a valve of an irrigation system and maintains it subsequent application of a holding current that is smaller than the pull-in current is in the actuated state. The wiring has a current limiter on the input side with a power supply and on the output side with a drive coil connected is. It outputs a limiter current which is smaller than the starting current. Between the current limiter and the drive coil is arranged an energy store, between the energy storage and the drive coil a switching element. The switching element switches the Energy storage is delayed by the drive coil. Thereby Switching usually takes place only when the Energy storage with a sufficient for actuating the valve Energy content is applied.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine Beschaltung für ein elektromagnetisches Schaltgerät zu schaffen, mit der einerseits die Antriebsspule mit Sicherheit mit dem benötigten Anzugsstrom versorgbar ist, andererseits aber der aus der Stromversorgung entnommene Strom erheblich geringer ist.The object of the present invention is a To create circuitry for an electromagnetic switching device, with which on the one hand the drive coil with certainty the required starting current can be supplied, on the other hand the current drawn from the power supply is considerably lower is.

Die Aufgabe wird- ausgehend vom eingangs beschriebenen Stand der Technik - dadurch gelöst, daß der Begrenzerstrom kleiner als der Anzugsstrom ist, daß zwischen dem Strombegrenzer und der Antriebsspule ein Energiespeicher angeordnet ist und daß zwischen dem Energiespeicher und der Antriebsspule ein Durchschaltelement angeordnet ist, das der Energieinhalt des Energiespeichers erfasst und den Energiespeicher nur dann auf die Antriebsspule durchschaltet, wenn der Energiespeicher mit einem für ein Betätigen der Kontaktanordnung ausreichenden Energieinhalt beaufschlagt ist.The task is based on the state described at the beginning the technology - solved in that the limiter current is smaller than the starting current is that between the current limiter and the drive coil, an energy storage device is arranged and that a switching element between the energy store and the drive coil is arranged, the energy content of the energy storage recorded and the energy storage only on the Drive coil turns on when the energy storage with a sufficient for actuating the contact arrangement Energy content is applied.

Aufgrund der Begrenzung des Begrenzerstroms auf einen Wert kleiner als der Anzugsstrom ist die Belastung der Stromversorgung relativ gering. Aufgrund der Speicherung der Energie im Energiespeicher steht die zum Schalten des Schaltgeräts benötigte Energie zur Verfügung. Aufgrund des Durchschaltelements wird verhindert, daß die gespeicherte Energie zu einem Zeitpunkt auf die Antriebsspule durchgeschaltet wird, zu dem noch kein sicheres Schalten des Schaltgeräts gewährleistet ist. Due to the limitation of the limiter current to one value the load on the power supply is less than the starting current relatively low. Because of the storage of energy in the energy storage is the one for switching the switching device required energy available. Because of the switching element prevents the stored energy from becoming one Time is switched through to the drive coil at which no safe switching of the switching device is guaranteed yet is.

Der Energiespeicher kann prinzipiell beliebiger Natur sein. Beispielsweise kommen mechanische Schwungmassen oder Vorspannung von Federn durch kleine Elektromotoren in Frage. In der Regel wird aber ein elektrischer Energiespeicher verwendet, also ein Akkumulator oder insbesondere ein Kondensator.In principle, the energy store can be of any type. For example, mechanical centrifugal masses or preloading of springs by small electric motors in question. In the Usually an electrical energy storage is used, thus an accumulator or in particular a capacitor.

Die Betriebssicherheit des elektromagnetischen Schaltgeräts wird deutlich erhöht, wenn der Energiespeicher einen maximalen Energieinhalt aufweist und der maximale Energieinhalt für mindestens zwei aufeinanderfolgende Betätigungen der -Kontaktanordnung ausreicht.The operational safety of the electromagnetic switching device is increased significantly when the energy storage device reaches a maximum Has energy content and the maximum energy content for at least two successive actuations of the contact arrangement sufficient.

Wenn der Begrenzerstrom einstellbar ist, ist die Beschaltung universell bei verschiedenen elektromagnetischen Schaltgeräten einsetzbar, welche verschiedene Halteströme benötigen. Insbesondere ist in diesem Fall der Begrenzerstrom so einstellbar, daß er geringfügig größer als der Haltestrom ist.If the limiter current is adjustable, the wiring is universal for various electromagnetic switching devices can be used which require different holding currents. In this case, in particular, the limiter current can be set such that that it is slightly larger than the holding current.

Die Einstellbarkeit des Begrenzerstroms kann beispielsweise dadurch erreicht werden, daß der Strombegrenzer ein Ladeschaltelement mit einstellbarem Schaltverhältnis aufweist. The adjustability of the limiter current can, for example can be achieved in that the current limiter is a charging switching element with adjustable switching ratio.

Das Einstellen des Schaltverhältnisses kann beispielsweise durch Pulsweitenmodulation erfolgen.The switching ratio can be set, for example done by pulse width modulation.

Wenn dem Ladeschaltelement eine Drossel mit einer antiparallel gegengeschalteten Freilaufdiode vorgeordnet ist, erfolgen versorgungsseitig keine abrupten Stromänderungen.If the charging switching element has a choke with an anti-parallel is connected upstream free-wheeling diode No abrupt changes in current on the supply side.

Wenn das Durchschaltelement den Energiespeicher bei Erreichen einer Schaltschwelle auf die Antriebsspule durchschaltet und die Schaltschwelle einstellbar ist, ist die Schaltung für verschiedene elektromagnetische Schaltgeräte mit verschiedenen Anzugsströmen anpaßbar.When the switching element reaches the energy store a switching threshold switches through to the drive coil and the switching threshold is adjustable, the circuit is for different electromagnetic switching devices with different Tightening currents adjustable.

Wenn dem Durchschaltelement ein Durchschaltsignal zuführbar ist und das Durchschaltelement den Energiespeicher nur bei Anliegen des Durchschaltsignals auf die Antriebsspule durchschaltet, ist es möglich, den Energiespeicher vorzuladen und bei Anliegen des Durchschaltsignals sofort die Kontaktanordnung zu betätigen.If a switching signal can be supplied to the switching element is and the switching element only the energy storage The switching signal is applied to the drive coil, it is possible to pre-charge the energy storage and when the switching signal is present, the contact arrangement immediately to operate.

Wenn dem Strombegrenzer ein Gleichrichter vorgeordnet ist, ist die Beschaltung universell sowohl bei Versorgung mit Gleich- als auch bei Versorgung mit Wechselstrom einsetzbar.If a rectifier is installed upstream of the current limiter, the wiring is universal both when supplying with Can be used both directly and with AC power.

Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels. Dabei zeigt die Prinzipdarstellung der einzigen

FIG 1
ein elektromagnetisches Schaltgerät mit vorgeordneter Beschaltung.
Further advantages and details emerge from the following description of an exemplary embodiment. The basic diagram shows the only one
FIG. 1
an electromagnetic switching device with upstream wiring.

Gemäß FIG 1 weist ein elektromagnetisches Schaltgerät 1 eine Antriebsspule 2 und eine Kontaktanordnung 3 auf. Gemäß Ausführungsbeispiel ist das elektromagnetische Schaltgerät 1 als Schütz ausgebildet. Es könnte aber auch als Relais ausgebildet sein. 1 shows an electromagnetic switching device 1 Drive coil 2 and a contact arrangement 3. According to the embodiment is the electromagnetic switching device 1 as Contactor trained. But it could also be designed as a relay his.

Wenn die Antriebsspule 2 mit einem Anzugsstrom IA beaufschlagt wird, wird die Kontaktanordnung 3 betätigt. Nach dem Betätigen der Kontaktanordnung 3 kann die Antriebsspule 2 mit einem Haltestrom IH beaufschlagt werden, der kleiner als der Anzugsstrom IA ist, um die Kontaktanordnung 3 betätigt zu halten. Wird die Antriebsspule 2 mit einem Strom beaufschlagt, der kleiner als der Haltestrom IH ist, so geht die Kontaktanordnung 3 in den unbetätigten Zustand über. Ein erneutes Betätigen der Kontaktanordnung 3 ist dann nur durch Beaufschlagen der Antriebsspule 2 mit dem Anzugsstrom IA wieder möglich.When a drive current 2 A is applied to the drive coil 2, the contact arrangement 3 is actuated. After the contact arrangement 3 has been actuated, the drive coil 2 can be subjected to a holding current I H which is smaller than the starting current I A in order to keep the contact arrangement 3 actuated. If the drive coil 2 is supplied with a current which is less than the holding current I H , the contact arrangement 3 changes into the unactuated state. A renewed actuation of the contact arrangement 3 is then only possible again by applying the starting current I A to the drive coil 2.

Dem Schaltgerät 1 ist eine Spulenstromregelung 4 vorgeordnet, welche den durch die Antriebsspule 2 fließenden Strom auf den Anzugsstrom IA, den Haltestrom IH oder Null regelt. Ohne weitere Maßnahmen träte mit der bisher beschriebenen Schaltung aber dennoch beim Betätigen der Kontaktanordnung 3 eine hohe Strombelastung eines versorgenden Netzes mit dem Anzugsstrom IA auf.The switching device 1 is preceded by a coil current control 4 which regulates the current flowing through the drive coil 2 to the starting current I A , the holding current I H or zero. Without further measures, the circuit described so far would nevertheless cause a high current load of a supply network with the starting current I A when the contact arrangement 3 is actuated.

Um diese hohe Spitzenbelastung zu vermeiden, ist der Spulenstromregelung 4 ein Strombegrenzer 5 vorgeordnet. Der Strombegrenzer 5 ist eingangsseitig mit einer Stromversorgung verbunden, die eine Versorgungsspannung U aufweist: Ausgangsseitig ist der Strombegrenzer 5 über weitere Komponenten, auf die nachstehend näher eingegangen wird, mit der Spulenstromregelung 4 und damit indirekt mit der Antriebsspule 2 verbunden.To avoid this high peak load, the coil current control 4 upstream of a current limiter 5. The current limiter 5 is connected on the input side to a power supply, which has a supply voltage U: output side is the current limiter 5 on other components which will be discussed in more detail below with the coil current control 4 and thus indirectly connected to the drive coil 2.

Der Strombegrenzer 5 wird derart gesteuert, daß er einen Begrenzerstrom IL ausgibt, der kleiner als der Anzugsstrom IA ist. Im Idealfall ist der Begrenzerstrom IL geringfügig größer als der Haltestrom IH, z. B. um fünf bis 10 Prozent größer.The current limiter 5 is controlled in such a way that it outputs a limiter current I L which is less than the starting current I A. Ideally, the limiter current I L is slightly larger than the holding current I H , e.g. B. five to 10 percent larger.

Mit dem Begrenzerstrom IL wird ein Energiespeicher 6 geladen, der zwischen dem Strombegrenzer 5 und der Antriebsspule 2 bzw. der Spulenstromregelung 4 angeordnet ist. Der Energiespeicher 6 ist gemäß FIG 1 als Speicherkondensator 6 ausgebildet.The limiter current I L is used to charge an energy store 6, which is arranged between the current limiter 5 and the drive coil 2 or the coil current control 4. According to FIG. 1, the energy store 6 is designed as a storage capacitor 6.

Zwischen dem Energiespeicher 6 und der Antriebsspule 2 bzw. der Spulenstromregelung 4 ist ein Durchschaltelement 7 angeordnet. Mittels des Durchschaltelements 7 wird der Energieinhalt des Energiespeichers 6 erfaßt. Das Durchschaltelement 7 schaltet den Energiespeicher 6 nur dann auf die Antriebsspule 2 bzw. die Spulenstromregelung 4 durch, wenn der Energiespeicher 6 mit einem Energieinhalt beaufschlagt ist, der für ein Betätigen der Kontaktanordnung 3 ausreicht.Between the energy store 6 and the drive coil 2 or a switching element 7 is arranged in the coil current control 4. By means of the switching element 7, the energy content of the energy store 6 detected. The switching element 7 then switches the energy storage device 6 to the drive coil 2 or the coil current control 4 by when the energy storage 6 is acted upon with an energy content that for a Operating the contact arrangement 3 is sufficient.

Bei Ausbildung des Energiespeichers 6 als Speicherkondensator 6 ist der Energieinhalt des Energiespeichers 6 direkt durch die Kapazität des Speicherkondensators 6 und eine über dem Speicherkondensator 6 abfallende Speicherspannung Us gegeben. In diesem Fall muß also lediglich die Speicherspannung Us mit einer extern vorgebbaren und damit einstellbaren Schaltschwelle Us* verglichen werden. In diesem Fall schaltet das Durchschaltelement 7 den Energiespeicher 6 auf die Antriebsspule 2 durch, wenn die Speicherspannung Us größer oder gleich der Schaltschwelle Us* ist.When the energy store 6 is designed as a storage capacitor 6, the energy content of the energy store 6 is given directly by the capacitance of the storage capacitor 6 and a storage voltage U s dropping across the storage capacitor 6. In this case, only the memory voltage must U s to an externally predetermined and adjustable switching threshold U S * compared. In this case, the switching element 7 switches the energy store 6 through to the drive coil 2 when the storage voltage U s is greater than or equal to the switching threshold U s *.

Wie bereits erwähnt, wird die Beschaltung mit einer Versorgungsspannung U versorgt. Der maximale Energieinhalt des Energiespeichers 6 ist bei Ausbildung als Speicherkondensator 6 somit durch seine Kapazität und die Versorgungsspannung U bestimmt. Vorzugsweise ist die Kapazität des Speicherkondensators 6 derart bemessen, daß der Energieinhalt des Speicherkondensators 6 für mindestens zwei unmittelbar aufeinanderfolgende Betätigungen der Kontaktanordnung 3 ausreicht.As already mentioned, the circuit is connected to a supply voltage U supplied. The maximum energy content of the energy storage 6 is in training as a storage capacitor 6 thus by its capacity and the supply voltage U certainly. The capacitance of the storage capacitor is preferably 6 dimensioned such that the energy content of the storage capacitor 6 for at least two successive ones Actuations of the contact arrangement 3 is sufficient.

Gemäß FIG 1 weist der Strombegrenzer 5 ein Ladeschaltelement 8 auf, das von einer Steuerschaltung 9 angesteuert wird. Das Ladeschaltelement 8 wird also abwechselnd durchgeschaltet und gesperrt. Das Verhältnis zwischen Durchschaltzeit und Sperrzeit gibt das Schaltverhältnis an. Durch Variation des Schaltverhältnisses kann der Begrenzerstrom IL auf einen Maximalstrom IL* eingestellt werden. Das Einstellen des Schaltverhältnisses kann beispielsweise durch Pulsweitenmodulation erfolgen.According to FIG. 1, the current limiter 5 has a charging switching element 8 which is controlled by a control circuit 9. The charging switching element 8 is thus switched through and blocked alternately. The ratio between switching time and blocking time indicates the switching ratio. By varying the duty ratio of the limiter current I L can be to a maximum current I L * set. The switching ratio can be set, for example, by pulse width modulation.

Dem Strombegrenzer 5 ist eine Drossel 10 vorgeordnet. Der Drossel 10 ist eine Freilaufdiode 11 parallel gegengeschaltet. Damit ergibt sich eine gleichmäßigere Strombelastung des Versorgungsnetzes, da die Drossel Stromänderungen begrenzt.A choke 10 is arranged upstream of the current limiter 5. The Choke 10 is connected in parallel with a freewheeling diode 11. This results in a more even current load on the Supply network because the choke limits current changes.

Es ist möglich, das Durchschaltelement 7 bei Erreichen der Schaltschwelle Us* stets und unbedingt zu betätigen. In diesem Fall wird das Schaltgerät 1 durch Anlegen der Versorgungsspannung U betätigt. Es ist aber auch möglich, die Versorgungsspannung U permanent anzulegen und dem Durchschaltelement 7 ein separates Durchschaltsignal S zuzuführen. In diesem Fall schaltet das Durchschaltelement 7 den Energiespeicher 6 nur dann auf die Antriebsspule 2 bzw. die Spulenstromregelung 4 durch, wenn sowohl der Energiespeicher 6 einen hinreichenden Energieinhalt aufweist als auch das Durchschaltsignal S anliegt. In diesem Fall ist es also möglich, den Energiespeicher 6 vorzuladen.It is possible to always and unconditionally actuate the switching element 7 when the switching threshold U s * is reached. In this case, the switching device 1 is actuated by applying the supply voltage U. However, it is also possible to permanently apply the supply voltage U and to supply the switching element 7 with a separate switching signal S. In this case, the switching element 7 only switches the energy store 6 through to the drive coil 2 or the coil current control 4 when both the energy store 6 has sufficient energy content and the switch-through signal S is present. In this case, it is possible to pre-charge the energy store 6.

Gemäß FIG 1 ist dem Strombegrenzer 5 nebst Drossel 10 und Freilaufdiode 11 ein Gleichrichter 12 mit einem Stützkondensator 13 vorgeordnet. Damit ist die Beschaltung wahlweise mit Gleichspannung oder mit Wechselspannung versorgbar.According to FIG 1, the current limiter 5 together with choke 10 and Free-wheeling diode 11, a rectifier 12 with a backup capacitor 13 upstream. This means that the wiring is optionally available with DC voltage or can be supplied with AC voltage.

Bei geeigneter Dimensionierung der Beschaltung kann die in Verbindung mit FIG 1 beschriebene Spulenstromregelung 4 entfallen. Denn nach dem Entladen des Energiespeichers 6 fällt der der Antriebsspule 2 zugeführte Strom zwangsweise auf den Begrenzerstrom IL ab. Wenn also der Begrenzerstrom IL geringfügig größer als der Haltestrom IH ist und der Energieinhalt des Energiespeichers 6 hinreichend klein bemessen ist, wirkt der Strombegrenzer 5 zugleich als Spulenstromregelung. Eine separate Spulenstromregelung 4 ist dann nicht mehr erforderlich.With suitable dimensioning of the circuitry, the coil current control 4 described in connection with FIG. 1 can be omitted. This is because after the energy store 6 has been discharged, the current supplied to the drive coil 2 inevitably drops to the limiter current I L. If the limiter current I L is slightly larger than the holding current I H and the energy content of the energy store 6 is dimensioned sufficiently small, the current limiter 5 also acts as a coil current control. A separate coil current control 4 is then no longer necessary.

Claims (10)

  1. Circuit for an electromagnetic switching device (1) with at least one drive coil (2) which on application of an inrush current (IA) activates a contact arrangement (3) of the electromagnetic switching device (1) and on subsequent application of a hold current (1H), which is smaller than the inrush current (IA) keeps the contact arrangement (3) activated, with a current limiter (5), which is linked on the input side with a power supply and on the output side with the drive coil (2) and outputs a Limiting current (IL),
       whereby the limiter current (IL) is smaller than the inrush current (IA), with an energy store (6) being located between the current limiter (5) and the drive coil (2)and whereby a through switching element (7) is located between the energy store (6) and the drive coil (2), that records the energy content of the energy store (6) and only switches the energy store (6) through to the drive coil (2) if the energy store(6) is charged with a sufficient energy content for activating the contact arrangement (3).
  2. Circuit in accordance with claim 1, characterized in that, the energy store (6) takes the form of a storage capacitor (6).
  3. Circuit in accordance with claim 1 or 2, characterized in that, the energy store (6) features a maximum energy content and that the maximum energy content is sufficient for at least two consecutive activations of contact arrangement (3).
  4. Circuit in accordance with claim 1, 2 or 3, characterized in that, the limiter current(IL) is adjustable.
  5. Circuit in accordance with claim 4, characterized in that, the current limiter (5) features a load switch element (8) with adjustable switching ratio.
  6. Circuit in accordance with claim 5, characterized in that, the switching ratio is set by pulse width modulation.
  7. Circuit in accordance with 5 or 6, characterized in that, a choke (10) with an antiparallel reverse switched freewheeling diode (11) is located before the charge switching element (8).
  8. Circuit in accordance with one of the above claims, characterized in that, through switching element (7) switches energy store (6) through to drive coil (2) when a switching threshold (Us*) is reached and that the switching threshold (Us*) is adjustable.
  9. Circuit in accordance with one of the above claims, characterized in that, a through switching signal (S) can be applied to the through switching element (7) and that the through switching element (7) only switches through the energy store (6) when through switching signal (S) is present at drive coil (2).
  10. Circuit in accordance with one of the above claims, characterized in that, a rectifier (12) is located before current limiter (5).
EP00963898A 1999-08-12 2000-08-11 Circuitry for an electromagnetic switchgear Expired - Lifetime EP1203389B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19938112 1999-08-12
DE19938112 1999-08-12
PCT/DE2000/002707 WO2001013396A1 (en) 1999-08-12 2000-08-11 Circuitry for an electromagnetic switchgear

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EP1203389A1 EP1203389A1 (en) 2002-05-08
EP1203389B1 true EP1203389B1 (en) 2003-10-22

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EP00963898A Expired - Lifetime EP1203389B1 (en) 1999-08-12 2000-08-11 Circuitry for an electromagnetic switchgear

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CN (1) CN1369100A (en)
DE (1) DE50004180D1 (en)
WO (1) WO2001013396A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004038527A1 (en) * 2004-08-07 2006-03-16 Audi Ag Circuit arrangement for motor vehicles has device suitable for limiting current amplitude by feeding clocked signal, especially by high frequency clocking
US7903383B2 (en) 2007-07-09 2011-03-08 Smc Kabushiki Kaisha Solenoid valve driving circuit and solenoid valve

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2455569B (en) * 2007-12-14 2010-02-17 Renium Ltd Electro-mechanical actuator
DE102008045149B4 (en) * 2008-09-01 2016-03-31 Phoenix Contact Gmbh & Co. Kg Circuit arrangement for connection to a fail-safe output of a controller
DE102010030693A1 (en) * 2010-06-30 2012-01-05 Bayerische Motoren Werke Aktiengesellschaft Circuit arrangement for e.g. motor car, has switching element coupled to connection unit and pre-charge circuit in switch positions, where pre-charge circuit is provided with ohmic resistor and inductor that are connected in series
CN104064403B (en) * 2013-03-22 2016-05-04 海洋王（东莞）照明科技有限公司 A kind of control circuit that reduces relay power consumption

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716490A (en) * 1987-04-03 1987-12-29 George Alexanian Power saving module
DE19617110A1 (en) * 1996-04-19 1997-10-23 Siemens Ag Circuit arrangement for operating an electromagnet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004038527A1 (en) * 2004-08-07 2006-03-16 Audi Ag Circuit arrangement for motor vehicles has device suitable for limiting current amplitude by feeding clocked signal, especially by high frequency clocking
US7903383B2 (en) 2007-07-09 2011-03-08 Smc Kabushiki Kaisha Solenoid valve driving circuit and solenoid valve

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WO2001013396A1 (en) 2001-02-22
DE50004180D1 (en) 2003-11-27
EP1203389A1 (en) 2002-05-08
CN1369100A (en) 2002-09-11

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