EP0174467B1 - Ac contactor - Google Patents

Ac contactor Download PDF

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Publication number
EP0174467B1
EP0174467B1 EP85108836A EP85108836A EP0174467B1 EP 0174467 B1 EP0174467 B1 EP 0174467B1 EP 85108836 A EP85108836 A EP 85108836A EP 85108836 A EP85108836 A EP 85108836A EP 0174467 B1 EP0174467 B1 EP 0174467B1
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EP
European Patent Office
Prior art keywords
contact carrier
spring
contactor
additional mass
additional
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
EP85108836A
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German (de)
French (fr)
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EP0174467A1 (en
Inventor
Kurt Held
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
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Siemens AG
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Filing date
Publication date
Priority claimed from DE19843430363 external-priority patent/DE3430363A1/en
Priority claimed from DE19853505881 external-priority patent/DE3505881A1/en
Priority claimed from DE19853523051 external-priority patent/DE3523051A1/en
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT85108836T priority Critical patent/ATE51978T1/en
Publication of EP0174467A1 publication Critical patent/EP0174467A1/en
Application granted granted Critical
Publication of EP0174467B1 publication Critical patent/EP0174467B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H01H50/305—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature damping vibration due to functional movement of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/645—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection

Definitions

  • the invention relates to an alternating current contactor with an armature actuated by a magnet system, which is in operative connection with a restoring spring-loaded contact carrier holding the movable contact parts of the contact system.
  • the present invention has for its object to increase the contact reliability in AC contactors of the type mentioned. This is achieved according to the invention by the features specified in the characterizing part of claim 1.
  • the additional mass prevents the contact carrier from returning in the zero current passage. Due to the arrangement of the additional mass in connection with the spring, rebound damping is achieved, so that tearing open of the magnet system is impossible. In order to further optimize the rebound damping, it is advantageous if the coupling spring is stronger than the back pressure spring.
  • the arrangement according to the invention has proven particularly useful when the contactor has a hinged armature magnet.
  • the rebound damping is further improved if the additional mass is pressed against the contact carrier by the coupling spring against the switch-on direction.
  • a simple design of the AC contactor is obtained if, in the off position of the contactor, the coupling spring is supported at one end on the contact carrier and at the other end via the intermediate slide on one side of the additional mass, which is opposite that on the pressed-on side of the additional mass.
  • the coupling spring is supported at one end on the contact carrier and at the other end via the intermediate slide on one side of the additional mass, which is opposite that on the pressed-on side of the additional mass.
  • the additional spring causes a time delay in connection with the additional mass, with the advantage that the dynamic holding force is significantly greater than if the coupling spring is dimensioned according to the holding force valley without a time delay.
  • the additional spring can be dimensioned according to its function, i.e. it is possible to match the preload force and the spring steepness to the additional mass possible in terms of volume, so that the power requirement can be taken over for as long as possible, thereby bridging the holding force valley.
  • the preload force of the coupling spring is approximately ten times stronger than that of the additional spring.
  • a constructive design has been found to be advantageous, which consists in the additional spring being a leaf spring and two coil springs serving as coupling springs. Two relatively long springs with a small c-value can be used.
  • the contact carrier can be designed in the same way for direct current and alternating current drives, since additional mass and leaf spring can be omitted with direct current drives.
  • the AC contactor shown in the drawing has a housing 1 in which the magnet system with the core 2 and the coil 3 as well as the armature 4 and the contact carrier 6 spring-loaded by the back pressure spring 5 are mounted.
  • an additional mass 8 is firmly connected to the contact carrier 6.
  • the anchor 4 designed as a hinged anchor is via the spring 7 to one leg of the core pressed.
  • the armature 4 rests on the movable slide 9 relative to the contact carrier 6, which in turn is in operative connection with the contact carrier 6 via the coupling spring 10.
  • the current profile 11 in the magnet system shown in FIG. 2 results.
  • the armature 4 moves in the direction of the core 2; the intermediate part 9 is set in motion, the preloaded coupling spring 10 is further tensioned.
  • the contact carrier 6 With increasing pressure of the coupling spring 10, the contact carrier 6 is moved against the force of the back pressure spring 5 - see the curve in FIG. 2, which indicates the path of the contact carrier over time, opening contacts (not shown) being opened.
  • the contacts remain open, since the coupling of the armature 4 to the contact carrier 6 with the additional mass 8 takes place via the coupling spring 10, so that the contact carrier 6 in the. Zero current crossing of the excitation system is excluded.
  • the additional mass 8 is here with its one side against an extension 14 of the contact carrier 6.
  • the with respect to the contact carrier 6 and the additional mass 8 displaceable intermediate slide 9 rests with the angled end 15 at the other end of the additional mass 8 and is by one end of the coupling spring 10, the other end of which is supported on the projection 16 of the contact carrier 6, in the direction pressed onto the approach 14, ie the additional mass 8 is movable relative to the contact carrier 6 in the "on" direction, the pretensioned coupling spring 10 being compressed.
  • the coupling spring 10 is made stronger here than the back pressure spring 5. If the magnet system is energized according to the exemplary embodiment according to FIG. 3, the same current profile 11 results in the magnet system according to FIG. 4 as before in FIG. 2.
  • the armature 4 moves in Towards core 2.
  • the contact carrier 6 is set in motion via the intermediate slide 9 and the prestressed coupling spring 10, and with increasing pressure on the coupling spring 10, the contact carrier 6 is moved against the force of the back pressure spring 5.
  • the additional mass is moved to the right under further tension of the coupling spring 10.
  • the contact carrier 6 remains longer at the stop and the intermediate slide 9 strikes the armature 4 late. This behavior can be seen from curve 12 in FIG. 4.
  • the rebound damping is thus significantly improved by the arrangement according to FIG. 3.
  • the coupling spring 10 is divided into two coil springs, which are supported on the one hand on the contact carrier 6 and on the other hand on the movable intermediate slide 9.
  • the intermediate slide 9 is pressed against stops 17 of the contact carrier 6.
  • the direction of attack of the armature 4 is represented by an arrow as in FIG. 6.
  • the additional mass 8 is pressed here by a leaf spring 18 against the direction of movement of the contact carrier 6 in the switch-on direction against the stop 14 on the contact carrier 6.
  • the free ends of the leaf spring 18 are supported on projections 20 of the contact carrier 6. Approximately in the middle of the leaf spring 18, the spherical bearing surface 21 of the additional mass 8 lies.
  • the leaf spring 18 When moving the additional mass 8, the leaf spring 18 engages around the spherical contact surface 21 of the additional mass 8.
  • the leaf spring 18 is relatively weak in relation to the two coupling springs 10 and is dimensioned such that it can temporarily take over the contactor's power requirement (time delay).
  • the intermediate slide 9 covers a distance of approximately 0.4 mm when the contact carrier 6 together with its additional mass 8 strikes the armature 4. Thus, the back swing of the contact carrier 6 is only about 0.4 mm.
  • the magnet system is excited, the current profile 11 shown in FIG. 7 results in the magnet system, which is the same as that shown in FIG. 2.
  • the armature moves in the direction of the core 2.
  • the contact carrier 6 is set in motion via the intermediate slide 9 and the prestressed coupling spring (s) 10, and with increasing pressure on the coupling spring (s) 10, the additional mass 8 is also moved by the stop 14 with the contact carrier. Since the spring 18 is weaker than the coupling spring (s) 10, the additional mass 8 executes an additional path when the contact carrier 6 reaches the on stop, i.e. the snapback from the spring-loaded slide to the spring-loaded additional mass takes place with a time delay. This fact can be seen on curve 12 in FIG. 7.
  • the scattering range of the path-time behavior, due to the phase position, is shown in dashed lines in FIG. 7 and designated 19.
  • the dynamic holding force of the pole faces, plotted over time in FIG. 8, refers to the path / time diagram of the contact carrier of FIG. 7.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

Die Erfindung bezieht sich auf ein Wechselstromschütz mit einem von einem Magnetsystem betätigten Anker, der mit einem die beweglichen Kontaktteile des Kontaktsystems haltenden, rückstellfederkraftbelasteten Kontaktträger in Wirkverbindung steht.The invention relates to an alternating current contactor with an armature actuated by a magnet system, which is in operative connection with a restoring spring-loaded contact carrier holding the movable contact parts of the contact system.

Bei einem bekannten Wechselstromschütz dieser Art (DE-U-8 134 374) ist beim Einschalten ein Rücklauf des Kontaktträgers beim ersten Stromnulldurchgang des Erregerstroms für das Magnetsystem nicht auszuscdhließen, so daß Doppelkommandos auftreten können.In a known AC contactor of this type (DE-U-8 134 374), when the switch is turned on, a return of the contact carrier during the first current zero crossing of the excitation current cannot be ruled out for the magnet system, so that double commands can occur.

Aus der DE-B-1 765 237 ist es bekannt das Öffnen und Schließen von Hilfskontakten von Schützen zu Verzögern, in dem mann den einzelnen Kontaktbrücken Zusätzlichen Massen zuordnet.From DE-B-1 765 237 it is known to delay the opening and closing of auxiliary contacts of shooters by assigning additional masses to the individual contact bridges.

Bei einem weiterhin bekannten elektromagnetischen Relais (US-A-2 233 925) ist eine nachgiebige Kupplung zwischen dem die beweglichen Kontakte tragenden Kontaktträger und dem Anker in Form von Federn derart vorgesehen, daß sich ein Reibkontakt zwischen den beweglichen Kontaktbrücken und den feststehenden Kontaktteilen bei Betätigen der Relaisschließer- bzw. -öffner-kontakte ergibt.In a further known electromagnetic relay (US-A-2 233 925), a flexible coupling between the contact carrier carrying the movable contacts and the armature in the form of springs is provided such that there is a frictional contact between the movable contact bridges and the fixed contact parts when actuated the relay normally open or normally closed contacts results.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Kontaktsicherheit bei Wechselstromschützen der eingangs genannten Art zu erhöhen. Dies wird erfindungsgemäß durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale erreicht. Die Zusatzmasse verhindert einen Rücklauf des Kontaktträgers im Stromnulldurchgang. Durch die Anordnung der Zusatzmasse in Verbindung mit der Feder wird eine Rückpralldämpfung erreicht, so daß ein Aufreißen des Magnetsystems ausgeschlossen ist. Um die Rückpralldämpfung weiter zu optimieren ist es vorteilhaft, wenn die Koppelfeder stärker als die Rückdruckfeder ist. Die erfindungsgemäße Anordnung hat sich besonders bewährt, wenn das Schütz einen Klappankermagneten besitzt.The present invention has for its object to increase the contact reliability in AC contactors of the type mentioned. This is achieved according to the invention by the features specified in the characterizing part of claim 1. The additional mass prevents the contact carrier from returning in the zero current passage. Due to the arrangement of the additional mass in connection with the spring, rebound damping is achieved, so that tearing open of the magnet system is impossible. In order to further optimize the rebound damping, it is advantageous if the coupling spring is stronger than the back pressure spring. The arrangement according to the invention has proven particularly useful when the contactor has a hinged armature magnet.

Die Rückpralldämpfung wird noch weiter verbessert, wenn die Zusatzmasse von der Koppelfeder entgegen der Einschaltrichtung des Kontaktträger an diesen angedrückt wird.The rebound damping is further improved if the additional mass is pressed against the contact carrier by the coupling spring against the switch-on direction.

Eine einfache Ausführung des Wechselstromschützes ergibt sich, wenn sich in der Aus-Stellung des Schützes die Koppelfeder mit ihrem einen Ende am Kontaktträger und mit ihrem anderen Ende über den Zwischenschieber an einer Seite der Zusatzmasse abstützt, die der an den angedrückten Seite der Zusatzmasse gegenüberliegt. Hierdurch wird beim Aufpressen des Zwischenschiebers auf den Anker praktisch nur die Vorspannkraft der Koppelfeder am Anker wirksam. Der Rückschwingweg des Kontakkträgers kann noch kleiner werden, wenn die Zusatzmasse von einer Zusatzfeder entgegen der Einschaltrichtung des Kontaktträgers gegen einen Anschlag am Kontaktträger gedrückt ist. Die Zusatzmasse verhindert zunächst einen Rücklauf des Kontaktträgers im Stromnulldurchgang und bewirkt in Verbindung mit der Zusatzfeder ein zeitverzögertes Auftreffen des Kontaktträgers auf den Anker. Die Zusatzfeder bewirkt in Verbindung mit der Zusatzmasse eine Zeitverzögerung, mit dem Vorteil, daß die dynamische Haltekraft wesentlich größer ist als wenn die Koppelfeder ohne Zeitverzögerung nach dem Haltekrafttal dimensioniert ist. Für die optimale Zeitverzögerung (Kraftgewinn) kann die Zusatz- feder ihrer Funktion entsprechend dimensioniert werden, d.h. eine Abstimmung von Vorspannkraft und Federsteilheit auf die dem Volumen nach mögliche Zusatzmasse ist möglich, so daß der Kraftbedarf möglichst lange übernommen werden kann, wodurch das Haltekraft-Tal überbrückt wird. Hier hat es sich als vorteilhaft erwiesen, wenn die Vorspannkraft der Koppelfeder gegenüber der Zusatzfeder ca. zehnmal stärker ist. Als vorteilhaft hat sich eine konstruktive Ausführung ergeben, die darin besteht, daß die Zusatzfeder eine Blattfeder ist und als Koppelfeder zwei Schraubenfedern dienen. Es können zwei relativ lange Federn mit kleinem c-Wert Verwendung finden. Der Kontaktträger kann bei Gleich- und Wechselstromantrieb gleich ausgeführt werden, da Zusatzmasse und Blattfeder bei Gleichstromantrieb entfallen kann.A simple design of the AC contactor is obtained if, in the off position of the contactor, the coupling spring is supported at one end on the contact carrier and at the other end via the intermediate slide on one side of the additional mass, which is opposite that on the pressed-on side of the additional mass. As a result, when the intermediate slide is pressed onto the armature, practically only the pretensioning force of the coupling spring on the armature is effective. The return path of the contact carrier can become even smaller if the additional mass is pressed against a stop on the contact carrier by an additional spring against the switch-on direction of the contact carrier. The additional mass initially prevents the contact carrier from returning in the zero current passage and, in conjunction with the additional spring, causes the contact carrier to strike the armature with a time delay. The additional spring causes a time delay in connection with the additional mass, with the advantage that the dynamic holding force is significantly greater than if the coupling spring is dimensioned according to the holding force valley without a time delay. For the optimal time delay (gain of force) the additional spring can be dimensioned according to its function, i.e. it is possible to match the preload force and the spring steepness to the additional mass possible in terms of volume, so that the power requirement can be taken over for as long as possible, thereby bridging the holding force valley. Here it has proven to be advantageous if the preload force of the coupling spring is approximately ten times stronger than that of the additional spring. A constructive design has been found to be advantageous, which consists in the additional spring being a leaf spring and two coil springs serving as coupling springs. Two relatively long springs with a small c-value can be used. The contact carrier can be designed in the same way for direct current and alternating current drives, since additional mass and leaf spring can be omitted with direct current drives.

Anhand der Zeichnung wird ein Ausführungsbeispiel des Gegenstandes der Erfindung einschließlich der Wirkungsweise näher erläutert.An exemplary embodiment of the subject matter of the invention, including the mode of operation, is explained in more detail with reference to the drawing.

Es zeigen:

  • Fig. 1 eine schematische Darstellung des Wechselstromschützes,
  • Fig. 2 den Stromverlauf im Erregersystem über der Zeit, den Weg des Kontaktträgers über der Zeit sowie den Zustand eines Öffner- und Schlie- ßerkontaktes über der Zeit für eine Anordnung gemäß Fig. 1,
  • Fig. 3 eine gegenüber der Ausführung nach Fig. 1 verbesserte Ausführung des Wechselstromschützes in schematischer Darstellung,
  • Fig. 4 die durch die Verbesserung erreichte Verflachung der Kurve des Weges des Kontaktträgers über der Zeit gegenüber der Darstellung in Fig. 2,
  • Fig. 5 eine gegenüber der nach Fig. 3 weiter verbesserte Ausführung des Wechselstromschützes in schematischer Darstellung,
  • Fig. 6 eine Ausführung gemäß Figur 5 mit einer Blattfeder als Zusatzfeder,
  • Fig. 7 die durch die Verbesserung erreichte Verflachung der Kurve des Weges des Kontaktträgers über der Zeit in der Darstellung gemäß Fig. 2 und
  • Fig. 8 die dynamische Haltekraft der Magnetteile über der Zeit.
Show it:
  • 1 is a schematic representation of the AC contactor,
  • 2 shows the current profile in the excitation system over time, the path of the contact carrier over time and the state of an NC and NO contact over time for an arrangement according to FIG. 1,
  • 3 is a schematic representation of an improved version of the AC contactor compared to the embodiment according to FIG. 1,
  • 4 shows the flattening of the curve of the path of the contact carrier over time achieved by the improvement compared to the representation in FIG. 2,
  • 5 shows a schematic illustration of the AC contactor which is further improved compared to FIG. 3,
  • 6 shows an embodiment according to FIG. 5 with a leaf spring as an additional spring,
  • 7 shows the flattening of the curve of the path of the contact carrier over time achieved by the improvement in the illustration according to FIGS. 2 and
  • Fig. 8 shows the dynamic holding force of the magnetic parts over time.

Das in der Zeichnung dargestellte Wechselstromschütz hat ein Gehäuse 1, in dem das Magnetsystem mit dem Kern 2 und der Spule 3 sowie der Anker 4 und der durch die Rückdruckfeder 5 federkraftbelastete Kontaktträger 6 gelagert sind. Mit dem Kontaktträger 6 ist gemäß Ausführung Fig. 1 eine Zusatzmasse 8 fest verbunden. Der als Klappanker ausgebildete Anker 4 ist über die Feder 7 an den einen Schenkel des Kernes gedrückt. An der anderen Seite liegt der Anker 4 an dem relativ zum Kontaktträger 6 beweglichen Zwischen schieber 9 an, der seinerseits über die Koppelfeder 10 mit dem Kontakttraäger 6 in Wirkverbindung steht.The AC contactor shown in the drawing has a housing 1 in which the magnet system with the core 2 and the coil 3 as well as the armature 4 and the contact carrier 6 spring-loaded by the back pressure spring 5 are mounted. According to the embodiment in FIG. 1, an additional mass 8 is firmly connected to the contact carrier 6. The anchor 4 designed as a hinged anchor is via the spring 7 to one leg of the core pressed. On the other hand, the armature 4 rests on the movable slide 9 relative to the contact carrier 6, which in turn is in operative connection with the contact carrier 6 via the coupling spring 10.

Wird nun das Magnetsystem erregt, so ergibt sich der aus Fig. 2 ersichtliche Stromverlauf 11 im Magnetsystem. Der Anker 4 bewegt sich in Richtung auf den Kern 2 zu; der Zwischenteil 9 wird in Bewegung gesetzt, die vorgespannte Koppelfeder 10 weiter gespannt. Mit zunehmendem Druck der Koppelfeder 10 wird der Kontaktträger 6 entgegen der Kraft der Rückdruckfeder 5 bewegt - siehe hierzu die Kurvenz in Fig. 2, die den Weg des Kontaktträgers über der Zeit angibt, wobei nicht näher dargestellte Öffner-Kontakte geöffnet werden. Die Kontakte bleiben, offen, da die Ankopplung des Ankers 4 an den Kontaktträger 6 mit der Zusatzmasse 8 über die Koppelfeder 10 erfolgt, so daß infolge der bis dahin gespeicherten kinetischen Energie ein Rückschwingen des Kontaktträgers 6 im. Stromnulldurchgang des Erregersystems ausgeschlossen ist.If the magnet system is now excited, the current profile 11 in the magnet system shown in FIG. 2 results. The armature 4 moves in the direction of the core 2; the intermediate part 9 is set in motion, the preloaded coupling spring 10 is further tensioned. With increasing pressure of the coupling spring 10, the contact carrier 6 is moved against the force of the back pressure spring 5 - see the curve in FIG. 2, which indicates the path of the contact carrier over time, opening contacts (not shown) being opened. The contacts remain open, since the coupling of the armature 4 to the contact carrier 6 with the additional mass 8 takes place via the coupling spring 10, so that the contact carrier 6 in the. Zero current crossing of the excitation system is excluded.

Zur Ausführungsform nach Fig. 3: Die Zusatzmasse 8 liegt hier mit ihrer einen Seite an einem Ansatz 14 des Kontaktträgers 6 an. der gegenüber dem Kontaktträger 6 und der Zusatzmasse 8 verschiebbare Zwischenschieber 9 liegt mit dem abgewinkelten Ende 15 am anderen Ende der Zusatzmasse 8 an und wird durch das eine Ende der Koppelfeder 10, deren anderes Ende sich an dem Vorsprung 16 des Kontaktträgers 6 abstützt, in Richtung auf den Ansatz 14 gepreßt, d.h. die Zusatzmasse 8 ist relativ zum Kontaktträger 6 in Richtung "Ein" beweglich, wobei die vorgespannte Koppelfeder 10 zusammengedrückt wird. Die Koppelfeder 10 ist hier stärker ausgeführt als die Rückdruckfeder 5. Wird nach dem Ausführungsbeispiel nach Fig. 3 das Magnetsystem erregt, so ergibt sich entsprechend Fig. 4 der gleiche Stromverlauf 11 im Magnetsystem wie vorher in Fig. 2. Der Anker 4 bewegt sich in Richtung auf den Kern 2 zu. Der Kontaktträger 6 wird über den Zwischenschieber 9 und die vorgespannte Koppelfeder 10 in Bewegung gesetzt, und mit zunehmendem Druck auf die Koppelfeder 10 wird der Kontaktträger 6 entgegen der Kraft der Rückdruckfeder 5 bewegt. Im weiteren Verlauf, auch noch nachdem der Kontakt träger seinen Anschlag erreicht hat, wird die Zusatzmasse unter weiterer Spannung der Koppelfeder 10 nach rechts bewegt. Hierdurch verharrt der Kontaktträger 6 länger am Anschlag und der Zwischenschieber 9 trifft verspätet auf den Anker 4 auf. Dieses Verhalten ist aus der Kurve 12 in Fig. 4 zu erkennen. Die Rückpralldämpfung wird durch die Anordnung nach Fig. 3 somit wesentlich verbessert.Regarding the embodiment according to FIG. 3: the additional mass 8 is here with its one side against an extension 14 of the contact carrier 6. the with respect to the contact carrier 6 and the additional mass 8 displaceable intermediate slide 9 rests with the angled end 15 at the other end of the additional mass 8 and is by one end of the coupling spring 10, the other end of which is supported on the projection 16 of the contact carrier 6, in the direction pressed onto the approach 14, ie the additional mass 8 is movable relative to the contact carrier 6 in the "on" direction, the pretensioned coupling spring 10 being compressed. The coupling spring 10 is made stronger here than the back pressure spring 5. If the magnet system is energized according to the exemplary embodiment according to FIG. 3, the same current profile 11 results in the magnet system according to FIG. 4 as before in FIG. 2. The armature 4 moves in Towards core 2. The contact carrier 6 is set in motion via the intermediate slide 9 and the prestressed coupling spring 10, and with increasing pressure on the coupling spring 10, the contact carrier 6 is moved against the force of the back pressure spring 5. In the further course, even after the contact carrier has reached its stop, the additional mass is moved to the right under further tension of the coupling spring 10. As a result, the contact carrier 6 remains longer at the stop and the intermediate slide 9 strikes the armature 4 late. This behavior can be seen from curve 12 in FIG. 4. The rebound damping is thus significantly improved by the arrangement according to FIG. 3.

Bei der Ausführungsform nach Fig. 6 ist die Koppelfeder 10 in zwei Schraubenfedern aufgeteilt, die sich einerseits am Kontaktträger 6 und andererseits an dem beweglichen Zwischenschieber 9 abstützen. Der Zwischenschieber 9 ist gegen Anschläge 17 des Kontaktträgers 6 gedrückt. Die Angriffsrichtung des Ankers 4 ist wie in Fig. 6 durch einen Pfeil dargestellt. Die Zusatzmasse 8 wird hier durch eine Blattfeder 18 entgegen der Bewegungsrichtung des Kontaktträgers 6 im Einschaltsinne gegen den Anschlag 14 am Kontaktträger 6 gedrückt. Die freien Enden der Blattfeder 18 stützen sich an Vorsprüngen 20 des Kontaktträgers 6 ab. Etwa in der Mitte der Blattfeder 18 liegt die ballig ausgeführte Anlagefläche 21 der Zusatzmasse 8 an. Beim Bewegen der Zusatzmasse 8 umgreift die Blattfeder 18 die ballige Anlagefläche 21 der Zusatzmasse 8. Die Blattfeder 18 ist im Verhältnis zu den den beiden Koppelfedern 10 relativ schwach ausgeführt und so dimensioniert, daß sie kurzzeitig den Kraftbedarf des Schützes übernehmen kann (Zeitverzögerung). Der Zwischenschieber 9 legt etwa einen Weg von 0,4 mm zurück, wenn der Kontaktträger 6 samt seiner Zusatzmasse 8 auf den Anker 4 auftrifft. Somit beträgt das Rückschwingen des Kontaktträgers 6 nur etwa 0,4 mm.In the embodiment according to FIG. 6, the coupling spring 10 is divided into two coil springs, which are supported on the one hand on the contact carrier 6 and on the other hand on the movable intermediate slide 9. The intermediate slide 9 is pressed against stops 17 of the contact carrier 6. The direction of attack of the armature 4 is represented by an arrow as in FIG. 6. The additional mass 8 is pressed here by a leaf spring 18 against the direction of movement of the contact carrier 6 in the switch-on direction against the stop 14 on the contact carrier 6. The free ends of the leaf spring 18 are supported on projections 20 of the contact carrier 6. Approximately in the middle of the leaf spring 18, the spherical bearing surface 21 of the additional mass 8 lies. When moving the additional mass 8, the leaf spring 18 engages around the spherical contact surface 21 of the additional mass 8. The leaf spring 18 is relatively weak in relation to the two coupling springs 10 and is dimensioned such that it can temporarily take over the contactor's power requirement (time delay). The intermediate slide 9 covers a distance of approximately 0.4 mm when the contact carrier 6 together with its additional mass 8 strikes the armature 4. Thus, the back swing of the contact carrier 6 is only about 0.4 mm.

Wird nach dem Ausführungsbeispiel nach Fig. 5 oder 6 das Magnetsystem erregt, so ergibt sich der in Fig. 7 gezeigte Stromverlauf 11 im Magnetsystem, der gleich ist dem in Fig. 2 gezeigten. Der Anker bewegt sich in Richtung auf den Kern 2 zu. Der Kontaktträger 6 wird über den Zwischenschieber 9 und die vorgespannte(n) Koppelfeder(n) 10 in Bewegung gesetzt, und mit zunehmenden Druck auf die Koppelfeder(n) 10 wird mit dem Kontaktträger auch die Zusatzmasse 8 durch den Anschlag 14 bewegt. Da die Feder 18 schwächer als die Koppelfeder(n) 10 ausgebildet ist, führt die Zusatzmasse 8 bei Erreichen des Ein-Anschlages des Kontaktträgers 6 einen Zusätzlichen Weg aus, d.h. das Zurückschnellen vom federbelasteten Schieber zu federbelasteter Zusatzmasse erfolgt mit einer Zeitverzögerung. Dieser Sachverhalt ist auf der Kurve 12 in Fig. 7 zu entnehmen. Der Streubereich des Weg-Zeitverhaltens, bedingt durch die Phasenlage, ist gestrichelt in Fig. 7 dargestellt und mit 19 bezeichnet. Die in Fig. 8 über der Zeit aufgetragene dynamische Haltekraft der Polflächen nimmt Bezug auf das Weg/Zeit-Diagramm des Kontaktträgers der Fig. 7.If, according to the exemplary embodiment according to FIG. 5 or 6, the magnet system is excited, the current profile 11 shown in FIG. 7 results in the magnet system, which is the same as that shown in FIG. 2. The armature moves in the direction of the core 2. The contact carrier 6 is set in motion via the intermediate slide 9 and the prestressed coupling spring (s) 10, and with increasing pressure on the coupling spring (s) 10, the additional mass 8 is also moved by the stop 14 with the contact carrier. Since the spring 18 is weaker than the coupling spring (s) 10, the additional mass 8 executes an additional path when the contact carrier 6 reaches the on stop, i.e. the snapback from the spring-loaded slide to the spring-loaded additional mass takes place with a time delay. This fact can be seen on curve 12 in FIG. 7. The scattering range of the path-time behavior, due to the phase position, is shown in dashed lines in FIG. 7 and designated 19. The dynamic holding force of the pole faces, plotted over time in FIG. 8, refers to the path / time diagram of the contact carrier of FIG. 7.

Claims (9)

1. Alternating current contactor with an anchor (4) actuated by a magnetic system (2, 3), the anchor being effectively connected to a contact carrier (6) which holds the movable contact parts of the contact system and which is return spring power loaded, characterized in that the effective connection between the anchor (4) and the contact carrier (6) is produced by means of a coupling spring (10) and in that the contact carrier (6) is provided with an additional mass (8) which is arranged and quantified in such a way that in the switch-on phase of the contactor a return motion of the contact carrier (6) in the region of the current zero passage is avoided.
2. Contactor according to claim 1, characterized in that the coupling spring (10) is stronger than the back pressure spring (5).
3. Contactor according to claim 1 or 2, characterized in that it has a clapper anchor magnet.
4. Contactor according to claim 1 or 2, characterized in that the anchor (4) is effectively connected to the contact carrier (6) by means of an intermediate slide (9), which is mounted so that it can be displaced relative to the contact carrier (6), and by means of the coupling spring (10).
5. Contactor according to claim 1 or 4, characterized in that the additional mass (8) is pressed by the coupling spring (10) against the switch-on direction of the contact carrier (6) onto the latter (Figure 3).
6. Contactor according to claim 5, characterized in that in the "off" position of the contactor, the coupling spring (10) is supported with its one end on the contact carrier (6) and with its other end by means of the intermediate slide (9) on one side of the additional mass (8), which lies opposite the side of the additional mass (8) which is pressed against the contact carrier (6) (Figure 3).
7. Contactor according to claim 4, characterized in that the additional mass (8) is pressed by an additional spring (18) against the switch-on direction of the contact carrier (6) against a stop (14) on the contact carrier (6) (Figure 5).
8. Contactor according to claim 7, characterized in that the coupling spring (10) is prestressed about ten times more strongly than the additional spring (18).
9. Contactor according to claim 7 or 8, characterized in that the additional spring is a leaf spring (18) and two screw springs serve as coupling spring (10).
EP85108836A 1984-08-17 1985-07-15 Ac contactor Expired - Lifetime EP0174467B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108836T ATE51978T1 (en) 1984-08-17 1985-07-15 AC PROTECTOR.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19843430363 DE3430363A1 (en) 1984-08-17 1984-08-17 AC contactor
DE3430363 1984-08-17
DE3505881 1985-02-20
DE19853505881 DE3505881A1 (en) 1985-02-20 1985-02-20 AC contactor
DE3523051 1985-06-27
DE19853523051 DE3523051A1 (en) 1985-06-27 1985-06-27 AC contactor

Publications (2)

Publication Number Publication Date
EP0174467A1 EP0174467A1 (en) 1986-03-19
EP0174467B1 true EP0174467B1 (en) 1990-04-11

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ID=27192257

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Application Number Title Priority Date Filing Date
EP85108836A Expired - Lifetime EP0174467B1 (en) 1984-08-17 1985-07-15 Ac contactor

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US (1) US4625194A (en)
EP (1) EP0174467B1 (en)
JP (1) JPH0648614B2 (en)
DE (1) DE3577159D1 (en)

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US4716480A (en) * 1986-08-29 1987-12-29 Seagate Technology Carriage latch for a disc drive
DE3640312A1 (en) * 1986-11-26 1988-06-09 Tox Duebel Werk SPREADING DOWEL
DE3644172A1 (en) * 1986-12-23 1988-07-07 Bbc Brown Boveri & Cie ELECTROMAGNETIC SWITCH DRIVE FOR AN ELECTRICAL SWITCHGEAR
US4862127A (en) * 1988-11-23 1989-08-29 Datacard Corporation Solenoid shock absorbing bumper arrangement and method
DE58908154D1 (en) * 1989-12-13 1994-09-08 Siemens Ag AC contactor.
IT1238592B (en) * 1990-02-21 1993-08-18 Sasib Spa DIRECT CURRENT RELAYS, IN PARTICULAR SUITABLE FOR RAILWAY SIGNALING SYSTEMS, ESPECIALLY RELEASE OF THE TYPE F.S. 80
FR2707794B1 (en) * 1993-07-12 1995-08-18 Telemecanique Protection switch device.
DE29604046U1 (en) * 1996-03-05 1996-05-02 Klöckner-Moeller GmbH, 53115 Bonn Electromagnetic switching device with positive guidance
DE102007000056A1 (en) * 2007-01-31 2008-09-18 Hilti Aktiengesellschaft Vibration damper for hand tool
US8217741B1 (en) * 2009-08-26 2012-07-10 Patterson Paul D Magnetically loaded electromechanical switches
US8476999B1 (en) 2009-08-26 2013-07-02 Paul D. Patterson Magnetically loaded electromechanical switches
CN103065875B (en) * 2012-12-29 2016-03-02 浙江汇港电器有限公司 A kind of Subminiature large-current electromagnetic relay

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JPS5060755A (en) * 1973-09-28 1975-05-24
DE8134374U1 (en) * 1981-11-25 1982-04-01 Siemens AG, 1000 Berlin und 8000 München Electromagnetic system for electromagnetic switching devices

Also Published As

Publication number Publication date
DE3577159D1 (en) 1990-05-17
JPH0648614B2 (en) 1994-06-22
US4625194A (en) 1986-11-25
JPS6149337A (en) 1986-03-11
EP0174467A1 (en) 1986-03-19

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