EP1203389A1 - Circuitry for an electromagnetic switchgear - Google Patents

Circuitry for an electromagnetic switchgear

Info

Publication number
EP1203389A1
EP1203389A1 EP00963898A EP00963898A EP1203389A1 EP 1203389 A1 EP1203389 A1 EP 1203389A1 EP 00963898 A EP00963898 A EP 00963898A EP 00963898 A EP00963898 A EP 00963898A EP 1203389 A1 EP1203389 A1 EP 1203389A1
Authority
EP
European Patent Office
Prior art keywords
current
limiter
energy store
drive coil
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
EP00963898A
Other languages
German (de)
French (fr)
Other versions
EP1203389B1 (en
Inventor
Norbert Mitlmeier
Bernhard Streich
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1203389A1 publication Critical patent/EP1203389A1/en
Application granted granted Critical
Publication of EP1203389B1 publication Critical patent/EP1203389B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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 an electromagnetic switching device with at least one drive coil, which actuates a contact arrangement of the electromagnetic switching device when it is acted on by a pull-in current and, when subsequently acted on by a holding current which is smaller than the pull-in current, holds the contact arrangement actuated a current limiter which is connected on the input side to a power supply and on the output side to the drive coil and outputs a limiter current.
  • Electromagnetic switching devices i.e. contactors and relays, draw a high starting current from a power supply when switched on.
  • the starting current depends, among other things, on the supply voltage applied. It is known in the prior art to provide the electromagnetic switching device with a current limiter which limits the starting current to the minimum possible value regardless of the supply voltage present. Nevertheless, this minimal starting current, which has a very high value, is still required. With large contactors in particular, even mains interference is possible due to the high current load.
  • the object of the present invention is to provide a circuit for an electromagnetic switching device with which, on the one hand, the drive coil can be supplied with the required starting current, but on the other hand the current drawn from the power supply is considerably lower.
  • the object is achieved in that the limiter current is smaller than the starting current, that an energy store is arranged between the current limiter and the drive coil and that a switching element is arranged between the energy store and the drive coil, which switches the energy store through to the drive coil only when the energy store is acted upon with an energy content sufficient for actuating the contact arrangement.
  • the load on the power supply is relatively low. Because the energy is stored in the energy store, the energy required to switch the switching device is available. The switching element prevents the stored energy from being switched through to the drive coil at a point in time at which no reliable switching of the switching device is yet guaranteed.
  • the energy store can be of any type.
  • mechanical flywheels or preloading of springs by means of small electric motors can be considered.
  • an electrical energy store is used, that is to say an accumulator or in particular a capacitor.
  • the operational safety of the electromagnetic switching device is significantly increased if the energy store has a maximum energy content and the maximum energy content is sufficient for at least two successive actuations of the contact arrangement.
  • the circuit can be used universally with different electromagnetic switching devices that require different holding currents.
  • the limiter current can be set so that it is slightly larger than the holding current.
  • the adjustability of the limiter current can be achieved, for example, in that the current limiter has a charging switching element with an adjustable switching ratio.
  • the switching ratio can be set, for example, by pulse width modulation.
  • the circuit can be adapted for different electromagnetic switching devices with different starting currents.
  • the switching element can be supplied with a switching signal and the switching element only supplies the energy store
  • the switching signal is applied to the drive coil, it is possible to precharge the energy store and to actuate the contact arrangement immediately when the switching signal is applied.
  • the circuit can be used universally for both direct and alternating current supply.
  • 1 shows an electromagnetic switching device with upstream circuitry.
  • an electromagnetic switching device 1 has a drive coil 2 and a contact arrangement 3.
  • the electromagnetic switching device 1 is designed as a contactor. But it could also be designed as a relay.
  • a drive current 2 A is applied to the drive coil 2
  • the contact arrangement 3 is 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 supplying network with the starting current I A when the contact arrangement 3 is actuated.
  • a current limiter 5 is arranged upstream of the coil current control 4.
  • the current limiter 5 is connected on the input side to a power supply which has a supply voltage U.
  • the current limiter 5 is connected to the coil current control 4 and thus indirectly to the drive coil 2 via further components, which will be discussed in more detail below.
  • 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.
  • An energy store 6 is charged with the limiter current I, which is located between the current limiter 5 and the drive coil 2 or the coil current control 4 is arranged. According to FIG. 1, the energy store 6 is designed as a storage capacitor 6.
  • a switching element 7 is arranged between the energy store 6 and the drive coil 2 or the coil current control 4.
  • the energy content of the energy store 6 is detected by means of the switching element 7.
  • the switching element 7 switches the energy store 6 through to the drive coil 2 or the coil current control 4 only when the energy store 6 is supplied with an energy content which is sufficient for actuating the contact arrangement 3.
  • 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 * are compared. In this case, the switching element 7 switches the energy store 6 through to the drive coil 2 when the storage voltage U ⁇ is greater than or equal to the switching threshold U ⁇ *.
  • the circuit is supplied with a supply voltage U.
  • the maximum energy content of the energy store 6 is thus determined by its capacitance and the supply voltage U when it is designed as a storage capacitor 6.
  • the capacitance of the storage capacitor 6 is preferably measured such that the energy content of the storage capacitor 6 is sufficient for at least two immediately successive actuations of the contact arrangement 3.
  • 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 relationship between switching time and blocking time indicates the switching ratio.
  • a choke 10 is arranged upstream of the current limiter 5.
  • the choke 10 is connected in parallel with a free-wheeling diode 11. This results in a more uniform current load on the supply network, since 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 switches the energy store 6 through to the drive coil 2 or the coil current control 4 only 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.
  • Free-wheeling diode 11 precedes a rectifier 12 with a backup capacitor 13.
  • the circuit can thus be supplied with either DC voltage or AC voltage.

Abstract

The invention relates to an electromagnetic switchgear (1) which comprises a current limiter (5). Said current limiter limits the electric current supplied from a current supply to a limiter current (IL) that is lower than the break-away starting current (IA). In order to be able to supply the excitation coil (2) with the required break-away starting current (IA), an energy storage element (6) is located downstream of the current limiter (5). Said energy storage element is switched to the excitation coil (2) by a switching element (7) only if enough energy has been accumulated.

Description

Beschreibungdescription
Beschaltung für ein elektromagnetisches SchaltgerätCircuit for an electromagnetic switching device
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 Halte- ström, der kleiner als der Anzugsstrom ist, die Kontaktanordnung betätigt hält, mit einem Strombegrenzer, der eingangs- seitig mit einer Stromversorgung und ausgangsseitig mit der Antriebsspule verbunden ist und einen Begrenzerstrom ausgibt.The present invention relates to a circuit for an electromagnetic switching device with at least one drive coil, which actuates a contact arrangement of the electromagnetic switching device when it is acted on by a pull-in current and, when subsequently acted on by a holding current which is smaller than the pull-in current, holds the contact arrangement actuated a current limiter which is connected on the input side to a power supply and on the output side to the drive coil 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 anlie- genden 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, draw a high starting current from a power supply when switched on. The starting current depends, among other things, on the supply voltage applied. It is known in the prior art to provide the electromagnetic switching device with a current limiter which limits the starting current to the minimum possible value regardless of the supply voltage present. Nevertheless, this minimal starting current, which has a very high value, is still required. With large contactors in particular, even mains interference is possible due to the high current load.
Die Aufgabe der vorliegenden Erfindung besteht darin, eine Beschaltung für ein elektromagnetisches Schaltgerät zu schaffen, mit der einerseits die Antriebsspule mit dem benötigten Anzugsstrom versorgbar ist, andererseits aber der aus der Stromversorgung entnommene Strom erheblich geringer ist.The object of the present invention is to provide a circuit for an electromagnetic switching device with which, on the one hand, the drive coil can be supplied with the required starting current, but on the other hand the current drawn from the power supply is considerably lower.
Die Aufgabe wird 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 den Energiespeicher nur dann auf die Antriebsspule durchschaltet, wenn der Energiespeicher mit einem für ein Betätigen der Kontaktanordnung ausreichenden Energieinhalt beaufschlagt ist.The object is achieved in that the limiter current is smaller than the starting current, that an energy store is arranged between the current limiter and the drive coil and that a switching element is arranged between the energy store and the drive coil, which switches the energy store through to the drive coil only when the energy store is acted upon with an energy content sufficient for actuating the contact arrangement.
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 Durchschaltele- ments 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 a value smaller than the starting current, the load on the power supply is relatively low. Because the energy is stored in the energy store, the energy required to switch the switching device is available. The switching element prevents the stored energy from being switched through to the drive coil at a point in time at which no reliable switching of the switching device is yet guaranteed.
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 flywheels or preloading of springs by means of small electric motors can be considered. As a rule, however, an electrical energy store is used, that is to say an accumulator or in particular a capacitor.
Die Betriebssicherheit des elektromagnetischen Schaltgeräts wird deutlich erhöht, wenn der Energiespeicher einen maxima- len Energieinhalt aufweist und der maximale Energieinhalt für mindestens zwei aufeinanderfolgende Betätigungen der Kontaktanordnung ausreicht .The operational safety of the electromagnetic switching device is significantly increased if the energy store has a maximum energy content and the maximum energy content is sufficient for at least two successive actuations of the contact arrangement.
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 circuit can be used universally with different electromagnetic switching devices that require different holding currents. In this case, in particular, the limiter current can be set so that it is slightly larger than the holding current.
Die Einstellbarkeit des Begrenzerstroms kann beispielsweise dadurch erreicht werden, daß der Stro begrenzer ein Ladeschaltelement mit einstellbarem Schaltverhältnis aufweist. Das Einstellen des Schaltverhältnisses kann beispielsweise durch Pulsweitenmodulation erfolgen.The adjustability of the limiter current can be achieved, for example, in that the current limiter has a charging switching element with an adjustable switching ratio. The switching ratio can be set, for example, by pulse width modulation.
Wenn dem Ladeschaltelement eine Drossel mit einer antiparal- lel gegengeschalteten Freilaufdiode vorgeordnet ist, erfolgen versorgungsseitig keine abrupten Stromänderungen.If a choke with an anti-parallel freewheeling diode is arranged upstream of the charging switching element, there are 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.If the switching element switches the energy store through to the drive coil when a switching threshold is reached and the switching threshold is adjustable, the circuit can be adapted for different electromagnetic switching devices with different starting currents.
Wenn dem Durchschaltelement ein Durchschaltsignal zuführbar ist und das Durchschaltelement den Energiespeicher nur beiIf the switching element can be supplied with a switching signal and the switching element only supplies the energy store
Anliegen des Durchschaltsignals auf die Antriebsspule durchschaltet, ist es möglich, den Energiespeicher vorzuladen und bei Anliegen des Durchschaltsignals sofort die Kontaktanordnung zu betätigen.If the switching signal is applied to the drive coil, it is possible to precharge the energy store and to actuate the contact arrangement immediately when the switching signal is applied.
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 circuit can be used universally for both direct and alternating current supply.
Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels . Dabei zeigt die Prinzipdarstellung der einzigenFurther advantages and details emerge from the following description of an exemplary embodiment. The schematic diagram shows the only one
FIG 1 ein elektromagnetisches Schaltgerät mit vorgeordne- ter Beschaltung.1 shows an electromagnetic switching device with upstream circuitry.
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. 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.According to FIG. 1, an electromagnetic switching device 1 has a drive coil 2 and a contact arrangement 3. According to the exemplary embodiment, the electromagnetic switching device 1 is designed as a contactor. But it could also be designed as a relay. 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 supplying 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. Ausgangssei- tig 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.In order to avoid this high peak load, a current limiter 5 is arranged upstream of the coil current control 4. The current limiter 5 is connected on the input side to a power supply which has a supply voltage U. On the output side, the current limiter 5 is connected to the coil current control 4 and thus indirectly to the drive coil 2 via further components, which will be discussed in more detail below.
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 I 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.An energy store 6 is charged with the limiter current I, which is located between the current limiter 5 and the drive coil 2 or the coil current control 4 is arranged. 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.A switching element 7 is arranged between the energy store 6 and the drive coil 2 or the coil current control 4. The energy content of the energy store 6 is detected by means of the switching element 7. The switching element 7 switches the energy store 6 through to the drive coil 2 or the coil current control 4 only when the energy store 6 is supplied with an energy content which is sufficient for actuating the contact arrangement 3.
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 Schalt- schwelle Us* verglichen werden. In diesem Fall schaltet das Durchschaltelement 7 den Energiespeicher 6 auf die Antriebsspule 2 durch, wenn die SpeicherSpannung UΞ größer oder gleich der Schaltschwelle UΞ* 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 * are compared. In this case, the switching element 7 switches the energy store 6 through to the drive coil 2 when the storage voltage U Ξ is greater than or equal to the switching threshold U Ξ *.
Wie bereits erwähnt, wird die Beschaltung mit einer Versorgungsspannung U versorgt. Der maximale Energieinhalt des E- nergiespeichers 6 ist bei Ausbildung als Speicherkondensator 6 somit durch seine Kapazität und die Versorgungsspannung U bestimmt. Vorzugsweise ist die Kapazität des Speicherkonden- sators 6 derart gemessen, daß der Energieinhalt des Speicherkondensators 6 für mindestens zwei unmittelbar aufeinanderfolgende Betätigungen der Kontaktanordnung 3 ausreicht.As already mentioned, the circuit is supplied with a supply voltage U. The maximum energy content of the energy store 6 is thus determined by its capacitance and the supply voltage U when it is designed as a storage capacitor 6. The capacitance of the storage capacitor 6 is preferably measured such that the energy content of the storage capacitor 6 is sufficient for at least two immediately successive actuations of the contact arrangement 3.
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 Sperr- zeit 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 relationship 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 free-wheeling diode 11. This results in a more uniform current load on the supply network, since 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 Versor- gungsspannung 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 Spulen- Stromregelung 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 switches the energy store 6 through to the drive coil 2 or the coil current control 4 only 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 undAccording to FIG 1, the current limiter 5 together with choke 10 and
Freilaufdiode 11 ein Gleichrichter 12 mit einem Stützkondensator 13 vorgeordnet. Damit ist die Beschaltung wahlweise mit Gleichspannung oder mit Wechselspannung versorgbar.Free-wheeling diode 11 precedes a rectifier 12 with a backup capacitor 13. The circuit can thus be supplied with either DC voltage or AC voltage.
Bei geeigneter Dimensionierung der Beschaltung kann die inWith suitable dimensioning of the wiring, the 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 gering- fügig 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. Connection with coil current control 4 described in FIG. 1 is eliminated. 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 required.

Claims

Patentansprüche claims
1. Beschaltung für ein elektromagnetisches Schaltgerät (1) mit mindestens einer Antriebsspule (2), die bei Beaufschla- gung mit einem Anzugsstrom (IA) eine Kontaktanordnung (3) des elektromagnetischen Schaltgeräts (1) betätigt und bei nachfolgender Beaufschlagung mit einem Haltestrom (IH) , der kleiner als der Anzugsstrom (IA) ist, die Kontaktanordnung (3) betätigt hält, mit einem Strombegrenzer (5), der eingangssei- tig mit einer Stromversorgung und ausgangsseitig mit der Antriebsspule (2) verbunden ist und einen Begrenzerstrom (IL) ausgibt, d a d u r c h g e k e n n z e i c h n e t , daß der Begrenzerstrom (IL) kleiner als der Anzugsstrom (IA) ist, daß zwischen dem Strombegrenzer (5) und der Antriebsspule (2) ein Energiespeicher (6) angeordnet ist und daß zwischen dem Energiespeicher (6) und der Antriebsspule (2) ein Durchschaltelement (7) angeordnet ist, das den Energiespeicher (6) nur dann auf die Antriebsspule (2) durchschaltet, wenn der Energiespeicher (6) mit einem für ein Betätigen der Kontaktanordnung (3) ausreichenden Energieinhalt beaufschlagt ist.1. Wiring for an electromagnetic switching device (1) with at least one drive coil (2), which actuates a contact arrangement (3) of the electromagnetic switching device (1) when it is acted on by a pull-in current (I A ) and when subsequently subjected to a holding current ( I H ), which is smaller than the starting current (I A ), keeps the contact arrangement (3) actuated, with a current limiter (5), which is connected on the input side to a power supply and on the output side to the drive coil (2), and a limiter current (I L ) outputs, characterized in that the limiter current (I L ) is smaller than the starting current (I A ), that an energy store (6) is arranged between the current limiter (5) and the drive coil (2) and that between the energy store (6) and the drive coil (2), a switching element (7) is arranged, which switches the energy store (6) through to the drive coil (2) only when the energy store (6) is used for a bed actuation of the contact arrangement (3) sufficient energy content is applied.
2. Beschaltung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Energiespeicher (6) als Speicherkondensator (6) ausgebildet ist.2. Circuit according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the energy store (6) is designed as a storage capacitor (6).
3. Beschaltung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß der Energiespeicher (6) einen maximalen Energieinhalt aufweist und daß der maximale Energieinhalt für mindestens zwei aufeinanderfolgende Betätigungen der Kontaktanordnung (3) ausreicht. 3. Circuit according to claim 1 or 2, characterized in that the energy store (6) has a maximum energy content and that the maximum energy content is sufficient for at least two successive operations of the contact arrangement (3).
4. Beschaltung nach Anspruch 1, 2 oder 3, d a d u r c h g e k e n n z e i c h n e t , daß der Begrenzerstrom (IL) einstellbar ist.4. The circuit as claimed in claim 1, 2 or 3, characterized in that the limiter current (I L) is adjustable.
5. Beschaltung nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß der Strombegrenzer (5) ein Ladeschaltelement (8) mit einstellbarem Schaltverhältnis aufweist.5. Circuit according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the current limiter (5) has a charging switching element (8) with adjustable switching ratio.
6. Beschaltung nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , daß das Einstellen des Schaltverhältnisses durch Pulsweitenmodulation erfolgt.6. Circuit according to claim 5, d a d u r c h g e k e n n z e i c h n e t that the switching ratio is set by pulse width modulation.
7. Beschaltung nach Anspruch 5 oder 6, d a d u r c h g e k e n n z e i c h n e t , daß dem Ladeschaltelement (8) eine Drossel (10) mit einer antiparallel gegengeschalteten Freilaufdiode (11) vorgeordnet ist .7. Circuit according to claim 5 or 6, that the charge switching element (8) is preceded by a choke (10) with an anti-parallel freewheeling diode (11).
8. Beschaltung nach einem der obigen Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß das Durchschaltelement (7) den Energiespeicher (6) bei Erreichen einer Schaltschwelle (UΞ*) auf die Antriebsspule (2) durchschaltet und daß die Schaltschwelle (Us*) einstellbar ist.8. Wiring according to one of the above claims, characterized in that the switching element (7) switches through the energy store (6) on reaching the switching threshold (U Ξ *) on the drive coil (2) and that the switching threshold (U s *) is adjustable.
9. Beschaltung nach einem der obigen Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß dem Durchschaltelement (7) ein Durchschaltsignal (S) zuführbar ist und daß das Durchschaltelement (7) den Energiespeicher (6) nur bei Anliegen des Durchschaltsignals (S) auf die Antriebsspule (2) durchschaltet . 9. Wiring according to one of the above claims, characterized in that the switching element (7) a switching signal (S) can be fed and that the switching element (7) the energy store (6) only when the switching signal (S) is applied to the drive coil (2) switches through.
10. Beschaltung nach einem der obigen Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß dem Strombegrenzer (5) ein Gleichrichter (12) vorgeordnet ist. 10. Circuit according to one of the above claims, d a d u r c h g e k e n n z e i c h n e t that the current limiter (5) is preceded by a rectifier (12).
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

Publications (2)

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

Family

ID=7918089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00963898A Expired - Lifetime EP1203389B1 (en) 1999-08-12 2000-08-11 Circuitry for an electromagnetic switchgear

Country Status (4)

Country Link
EP (1) EP1203389B1 (en)
CN (1) CN1369100A (en)
DE (1) DE50004180D1 (en)
WO (1) WO2001013396A1 (en)

Families Citing this family (6)

* 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
JP4359855B2 (en) 2007-07-09 2009-11-11 Ｓｍｃ株式会社 Solenoid valve drive circuit and solenoid valve
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0113396A1 *

Also Published As

Publication number Publication date
WO2001013396A1 (en) 2001-02-22
EP1203389B1 (en) 2003-10-22
CN1369100A (en) 2002-09-11
DE50004180D1 (en) 2003-11-27

Similar Documents

Publication Publication Date Title
EP1527470B1 (en) Control circuit for an electromagnetic drive
DE102004005770A1 (en) Operating circuit and power switching device using the operating circuit
DE102005035658B3 (en) Operation of switching device uses control device which receives switching command, determines phase position of load phase or voltage and determines time path for governing state of switch sets governing state according to same
WO2001013396A1 (en) Circuitry for an electromagnetic switchgear
EP1269597A1 (en) Switching method for an electromagnetic switching device and an electromagnetic switching device corresponding thereto
DE3623908A1 (en) Control circuit for the magnet coil of an electromagnet
DE2019184C3 (en) Heavy current switchgear
DE3925767A1 (en) Control procedure for electromechanical relay - using circuit to reduce coil current and maintain switched state after response
DE3738493C2 (en) Fault location device
WO2001009910A1 (en) Timed tripping circuit for an electromechanical switching device
DE1288194B (en) Circuit arrangement for the rapid excitation of DC-operated electromagnets
DE2816361A1 (en) METHOD FOR OPERATING A POWER CAPACITOR FOR BLIND CURRENT COMPENSATION
DE19508885A1 (en) Electrical transformer-circuits peak voltage generation device
DE10036519B4 (en) A method for controlling a controllable current source and a controllable voltage source for charging the energy storage of a power modulator
DE822128C (en) Arrangement for interrupting electrical circuits
DE102020215711B4 (en) Tripping device for a circuit breaker
DE2347508C3 (en) Device for remote control of electrically operated switchgear
DE19516995A1 (en) Relay switch control circuit including oscillator
AT242242B (en) Circuit arrangement, in particular to avoid disturbances when switching on dormant DC-AC converters equipped with switching diodes, which are controlled by a square-wave current
DE759383C (en) Voltage-dependent relay device
DE917856C (en) Electrical converter
DE1640067B1 (en) CIRCUIT ARRANGEMENT FOR REGULATING THE ENERGY SUPPLY FOR ELECTRIC CONSUMERS BY CONVERTING AC INPUT ENERGY INTO DC OUTPUT ENERGY
DE2536638B2 (en) Switching device to eliminate or at least dampen the "inrush" effect (surge current effect)
DE1174957B (en) Circuit arrangement for lifting magnets
CH228078A (en) Contact converter with switching reactors.

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

17P Request for examination filed

Effective date: 20020109

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50004180

Country of ref document: DE

Date of ref document: 20031127

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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

Effective date: 20040723

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

Ref country code: DE

Payment date: 20061023

Year of fee payment: 7

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

Ref country code: IT

Payment date: 20070829

Year of fee payment: 8

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

Ref country code: FR

Payment date: 20070828

Year of fee payment: 8

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: 20080301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090430

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

Effective date: 20080811

Ref country code: FR

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

Effective date: 20080901