EP0272617A2 - Commande électromagnétique pour un interrupteur électrique - Google Patents

Commande électromagnétique pour un interrupteur électrique Download PDF

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Publication number
EP0272617A2
EP0272617A2 EP87118708A EP87118708A EP0272617A2 EP 0272617 A2 EP0272617 A2 EP 0272617A2 EP 87118708 A EP87118708 A EP 87118708A EP 87118708 A EP87118708 A EP 87118708A EP 0272617 A2 EP0272617 A2 EP 0272617A2
Authority
EP
European Patent Office
Prior art keywords
hinged
hinged armature
contact carrier
pole face
armature
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.)
Withdrawn
Application number
EP87118708A
Other languages
German (de)
English (en)
Other versions
EP0272617A3 (fr
Inventor
Georgi Dipl.-Ing. Cwetanski
Reiner Dipl.-Ing. Dick (Fh)
Peter Dr. Dipl.-Ing. Hoyer
Roland Klempp
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
BBC Brown Boveri AG Switzerland
Asea Brown Boveri AG Germany
BBC Brown Boveri AG Germany
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 BBC Brown Boveri AG Switzerland, Asea Brown Boveri AG Germany, BBC Brown Boveri AG Germany filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0272617A2 publication Critical patent/EP0272617A2/fr
Publication of EP0272617A3 publication Critical patent/EP0272617A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H50/24—Parts rotatable or rockable outside coil
    • H01H50/26—Parts movable about a knife edge

Definitions

  • the invention relates to an electromagnetic switch drive provided for an electrical switching device with a magnetic core surrounded by a magnetic coil and with a diapered magnetic yoke firmly connected to the magnetic core, the free ends of both the magnetic core and the magnetic yoke being designed as pole faces which are connected to one or cooperate with the hinged armature mounted near the pole face of the magnetic yoke, the latter leading a contact carrier from a first contact position, preferably a contact opening position, into a second contact position, preferably into the contact closing position, when the magnet coil is excited against a spring force.
  • Such an electromagnetic switch drive can be found, for example, in DE-OS 35 05 881 with regard to its basic mechanical structure.
  • cost-saving design principles have already been implemented, which - at least in the case of small shooters and their electromagnetic switch drives - are increasingly being used.
  • hinged anchors are no longer provided in the traditional way by means of an elaborate axle bearing and are also not equipped with separate return springs, but rather are loosely assigned to the magnetic core and magnet yoke construction and their return to an open position is taken over by the reset mechanism of a contact carrier arrangement.
  • a pressure spring that is too weak cannot adequately fulfill its task, but a pressure spring that is too strong can have an unfavorable effect on the friction phenomena that cannot be completely avoided with this construction, with the disadvantages already mentioned, and also otherwise have an unfavorable effect on switch operation.
  • the object of the present invention is to further improve the storage of the hinged anchor, to further reduce the required number of functional parts and to simplify the assembly steps or to favor the possibilities for at least partially automated assembly by means of a corresponding part design, without the reliability and the To affect the service life of the switch drive or the switching device.
  • the support of the hinged armature is provided on the pole face of the magnetic yoke and is located in an angular recess which is formed from the pole face of the magnetic yoke and an immediately adjacent wall surface which is at least approximately perpendicular to this pole face, whereby the end edge of the hinged anchor located in this angular recess and facing the pole face forms a bearing edge; Furthermore, it is provided for the solution of the task that the hinged armature - starting from its bearing on the pole face of the magnetic yoke - extends over the pole face of the magnetic core to a movable contact carrier influenced by at least one return spring and is in direct non-positive connection with it, whereby its area extending across the pole faces tapers almost suddenly in width compared to its previous longitudinal area; it is also provided that the hinged armature is guided and held therein by the movable contact carrier in the open position upon interruption of the excitation current for the magnetic coil, and finally that the hinged armature in
  • a tapering of the width of the hinged armature in the area which extends over the magnetic core up to the contact carrier is advantageous insofar as the mass to be moved can thereby be reduced, as a result of which impact loads and the on and off duration can be favorably influenced .
  • a particularly advantageous effect can be seen in the fact that the hinged anchor is not only guided into its open position and held therein by means of the spring-loaded contact carrier, son which also lies in its open position on the abovementioned stop edge and is pressed against it by a residual force of the return spring of the contact carrier. In this way, the effect of a bell crank is achieved and the hinged armature is held in a force-fitting manner on the pole face of the magnetic yoke.
  • the pressure spring which is generally present in the known prior art has become unnecessary, which is not only advantageous in terms of the number of parts required, but also brings with it the advantages already mentioned above in terms of storage and bearing friction.
  • a particularly advantageous storage can be seen from a design proposal for the invention, according to which it is provided that the end face of the hinged armature, which is located in the angular recess, runs at an acute angle to its face facing the pole face of the magnetic yoke, which angle is less than or at most equal to an angle of 90 °, minus the intended opening angle of the hinged anchor.
  • the friction forces that occur are thus kept to a minimum and wear phenomena are practically completely avoided.
  • a further, useful design suggestion finally relates to the hinged armature itself.
  • a protruding elevation in the form of a deformation or an additionally arranged part, for example a round head rivet, can be provided on the wall area facing the pole face of the magnetic core.
  • the amount of this protruding deformation or the runk head of a rivet should only be very small, but this is a point contact between the Folding armature and the associated pole surface of the magnetic core can be achieved, which has a very favorable effect on the so-called tearing force of the folding armature when it is opened.
  • FIG. 1 illustrates in a longitudinal section, ie in a central section along the central axis of a magnet coil 10, an electromagnetic switch drive for an electrical switching device.
  • This switch drive essentially consists of the magnetic coil 10 just mentioned, a magnet Core 11, which is surrounded by the magnet coil 10, further from an angular magnetic yoke 12 which is firmly connected to the magnetic core 11 and from a hinged armature 13.
  • This hinged armature 13 lies at its left-hand end in the illustration on a pole face 14 of the magnet yoke 12 on and otherwise acts together with a pole face 15 of the magnetic core during switch operation.
  • the magnet coil 10 As far as the magnet coil 10 is concerned, it should be added that it is wound on a coil body 16, the winding volume (based on the illustration) of which is limited at the top and bottom by coil body flanges 17 and 18. As far as its overall impression is concerned, the coil former flange 18 has a strong "thickening", ie it is still connected to a superstructure 19 in terms of shape.
  • a contact carrier 20 is also to be mentioned, which is influenced by a spring element 21 designed as a compression spring, further an intermediate layer 22, which is located between the magnet coil 10 or the coil body 16 and the contact carrier 20, and finally - if recognizable - Angled housing wall 23, on which the two legs of the angular magnetic yoke bear directly against the inside of the housing.
  • FIG. 2 This represents two half-cuts moved together on a center line 24, one of which is located along the section line AA indicated in FIG. 1 and the other along the section line BB indicated in FIG. 1.
  • This represents the means Line 24 also represents a mirror axis, ie the continuation of the individual half-sections AA and BB is a mirror image of the half-section shown in each case.
  • All previously mentioned parts of the electromagnetic switch drive are contained in FIG. 2 and provided with the same reference numbers as in FIG. 1.
  • this bearing end of the hinged armature 13 rests on the pole face 14 of the magnetic yoke 12 and is otherwise located in an angular recess which is formed from the pole face 14 just mentioned and the immediately adjacent wall surface of the housing wall 23 running perpendicular to this pole face . It is noteworthy that the end face 25 of the hinged anchor 13 located in this angular recess does not run perpendicular to the face of the hinged anchor 13 facing the magnetic yoke 12, but instead at an acute angle, which in the present case is significantly smaller than a right angle, minus the indicated opening angle "Alpha" of the hinged armature 13.
  • the lower front edge of the hinged armature which is in contact with the pole face 14, forms a regular bearing cutting edge, which is located and supported in the outermost corner of the angular recess described. Except for this cutting edge with very low friction values, no end-face friction occurs on the hinged armature 13 during switching operation.
  • the hinged anchor 13 has further, remarkable shapes, namely laterally projecting tabs 27 and 28, the first of which can be seen in the upper part of FIG. 2 and the other in FIGS. 1 and 3.
  • these side tabs 27 and 28 are located in mirror-image-like wall recesses in the superstructure 19 of the coil former 16, one of which, namely the wall recess 29, can be seen in FIGS. 1 and 3.
  • this wall recess 29 is shown again in a perspective view and on a larger scale than that shown in FIG. 1, in FIG. 4 .
  • a small section of the superstructure 19 of the coil former 16 and - in the direction of the viewer in front of it - a corner of the armature 13 with its laterally projecting tab 27 and its oblique end face 25 can be seen.
  • This lateral tab 27 of the hinged armature 13 can be inserted into the said wall recess 29 and then captured therein, wherein the wall regions 30 to 33 the freedom of movement of the hinged armature 13 or that of its tab 27 laterally outwards, downwards and upwards (in relation to the underside facing the pole faces and the opposite top side of the hinged armature 13) and on limit their side pointing in the direction of the contact carrier (here the wall area 33).
  • protruding beads 34 and 35 are formed within the wall recess 29, specifically on the wall area 30 and 33 thereof, which serve to keep the tab 27 friction during the movement of the hinged anchor 13 as low as possible. Such friction can occur in particular when the switchgear is in a lying position. It does not need to be specifically explained that there is also the other tab 28 of the hinged anchor 13 is located in a mirror-image, but otherwise identically designed wall recess, which however cannot be seen from the present representations.
  • the hinged anchor 13 is initially almost rectangular in its longitudinal area extending from the end face 25 in the direction of the contact carrier 20 (if one disregards the side tabs 27 and 28). This design extends up to the wall of the magnetic core 11 or the pole face 15 (on the right in the representations according to FIG. 1 and FIG. 2).
  • the hinged armature 13 tapers more or less abruptly in its width and opens into a tab-like longitudinal region 36, which protrudes into a continuous opening 37 in the contact carrier 20.
  • the tab-like longitudinal region 36 of the hinged armature 13 rests on a spherical surface 38 within the opening 37 and is thus in a force-locking connection with the contact carrier 20 - due to the action of the spring element 21.
  • the interaction of the hinged armature 13 with the contact carrier 20 does not require a particularly detailed explanation; it is sufficiently clear to the person skilled in the art that in the event of excitation of the magnetic coil 10, the hinged armature 13 is attracted to the pole face 15 of the magnetic core 11 (by the way until a protrusion 39 protruding above the lower face of the hinged armature strikes the pole face 15), whereby the tab-like longitudinal region 36 of the hinged armature 13 moves the contact carrier 20 downward against the force of the spring element 21 (in the illustration) and now — not shown — closes or opens contact elements. If the voltage supply to the magnetic coil 10 is interrupted, the magnetic holding force is also no longer given the contact carrier 20 is returned to its starting position (as shown) by the spring element 21 already mentioned, taking the hinged armature 13 with it.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
EP87118708A 1986-12-23 1987-12-17 Commande électromagnétique pour un interrupteur électrique Withdrawn EP0272617A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863644172 DE3644172A1 (de) 1986-12-23 1986-12-23 Elektromagnetischer schalterantrieb fuer ein elektrisches schaltgeraet
DE3644172 1986-12-23

Publications (2)

Publication Number Publication Date
EP0272617A2 true EP0272617A2 (fr) 1988-06-29
EP0272617A3 EP0272617A3 (fr) 1989-09-13

Family

ID=6317054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118708A Withdrawn EP0272617A3 (fr) 1986-12-23 1987-12-17 Commande électromagnétique pour un interrupteur électrique

Country Status (2)

Country Link
EP (1) EP0272617A3 (fr)
DE (1) DE3644172A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758412A1 (fr) * 1997-01-14 1998-07-17 Schneider Electric Sa Appareil interrupteur electromagnetique

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19502322C1 (de) * 1995-01-26 1996-05-09 Kloeckner Moeller Gmbh Klappanker-Magnetantrieb für elektrische Schaltgeräte und Verfahren zu seiner Vormontage
DE19606884C1 (de) * 1996-02-23 1997-04-30 Schrack Components Ag Elektromagnetisches Relais
DE19606883C1 (de) * 1996-02-23 1997-04-30 Schrack Components Ag Elektromagnetisches Relais mit kombinierter Kontakt- und Rückstellfeder
DE19718985C1 (de) * 1997-05-05 1998-10-08 Schrack Components Ag Relais mit Kontaktfedern
ES2162446T3 (es) * 1997-05-05 2001-12-16 Tyco Electronics Austria Gmbh Rele electromagnetico.
DE19804572A1 (de) 1997-05-05 1999-08-12 Schrack Components Ag Relais mit Kontaktfedern
DE19903751A1 (de) * 1999-01-30 2000-08-24 Eltako Gmbh Schaltgeraete Elektromechanisches Schaltgerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232638B (de) * 1963-06-20 1967-01-19 Licentia Gmbh Elektromagnetischer Zeitwaechter
EP0080123A2 (fr) * 1981-11-25 1983-06-01 Siemens Aktiengesellschaft Système d'électro-aimant pour interrupteurs électromagnétiques
FR2561037A1 (fr) * 1984-03-10 1985-09-13 Bbc Brown Boveri & Cie Relais a armature en forme de l.
EP0174467A1 (fr) * 1984-08-17 1986-03-19 Siemens Aktiengesellschaft Contacteur pour courant alternatif

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE893095C (de) * 1944-09-29 1953-10-12 Siemens Ag Ankerlagerung fuer Relais
DE2112085A1 (de) * 1971-03-12 1972-09-14 Siemens Ag Elektromagnetisches Relais
DE7432774U (de) * 1974-09-30 1975-01-02 Siemens Ag Elektromagnetisches Relais
DE8208103U1 (de) * 1982-03-22 1985-05-15 Siemens AG, 1000 Berlin und 8000 München Aus formschlüssig ineinandergreifenden Teilen aufgebautes Luftschütz
DE3335732A1 (de) * 1983-10-01 1985-04-11 Brown, Boveri & Cie Ag, 6800 Mannheim Einrichtung zur rueckstellung des kontakttraegers eines elektromagnetischen schaltgeraetes, insbesondere eines schuetzes
DE3505881A1 (de) * 1985-02-20 1986-08-21 Siemens AG, 1000 Berlin und 8000 München Wechselstromschuetz

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232638B (de) * 1963-06-20 1967-01-19 Licentia Gmbh Elektromagnetischer Zeitwaechter
EP0080123A2 (fr) * 1981-11-25 1983-06-01 Siemens Aktiengesellschaft Système d'électro-aimant pour interrupteurs électromagnétiques
FR2561037A1 (fr) * 1984-03-10 1985-09-13 Bbc Brown Boveri & Cie Relais a armature en forme de l.
EP0174467A1 (fr) * 1984-08-17 1986-03-19 Siemens Aktiengesellschaft Contacteur pour courant alternatif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758412A1 (fr) * 1997-01-14 1998-07-17 Schneider Electric Sa Appareil interrupteur electromagnetique
EP0854489A1 (fr) * 1997-01-14 1998-07-22 Schneider Electric Sa Appareil interrupteur électromagnétique

Also Published As

Publication number Publication date
EP0272617A3 (fr) 1989-09-13
DE3644172A1 (de) 1988-07-07
DE3644172C2 (fr) 1991-12-19

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