EP1033736B1 - Magnetischer Betätiger mit Klappanker, insbesondere für einen Schutzschalter, und Schutzschalter mit einem solchen Betätiger - Google Patents

Magnetischer Betätiger mit Klappanker, insbesondere für einen Schutzschalter, und Schutzschalter mit einem solchen Betätiger Download PDF

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Publication number
EP1033736B1
EP1033736B1 EP00410016A EP00410016A EP1033736B1 EP 1033736 B1 EP1033736 B1 EP 1033736B1 EP 00410016 A EP00410016 A EP 00410016A EP 00410016 A EP00410016 A EP 00410016A EP 1033736 B1 EP1033736 B1 EP 1033736B1
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EP
European Patent Office
Prior art keywords
blade
branch
bevelled
free end
actuator
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
EP00410016A
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English (en)
French (fr)
Other versions
EP1033736A1 (de
Inventor
Robert Schneider Electric Industries SA Diconne
Corinne Schneider Electric Industries SA Roux
Christophe Schneider Electric Ind. SA Seraudie
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.)
Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1033736A1 publication Critical patent/EP1033736A1/de
Application granted granted Critical
Publication of EP1033736B1 publication Critical patent/EP1033736B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • the invention relates to a magnetic actuator, in particular for opening the contacts of a breaking device such as a circuit breaker and / or tripping said circuit breaker in the event of an electrical fault, this actuator comprising a magnetic circuit formed by a ferromagnetic yoke, said cylinder head comprising a first and second branches substantially parallel to each other connected by a transverse base piece, a movable pallet mounted articulated by one of its ends on the free end of the first branch and cooperating at its other end with the free end of the second branch, means for producing a magnetic field capable of moving the pallet in rotation between an open position of rest of the pallet corresponding to the normal operation of the apparatus and an active position corresponding to the appearance of a defect in the apparatus, in which the free end of the pallet is held in the repositioning position minimal luctance with respect to the free end of the second branch.
  • a magnetic actuator in particular for opening the contacts of a breaking device such as a circuit breaker and / or tripping said circuit breaker in the event of
  • the yoke is U-shaped and comprises two branches of the same length, while the pallet is formed by a rectangular section plate.
  • the attraction force generated by the coil in case of electrical fault is minimum at the beginning of closing of the pallet, and grows as the pallet closes.
  • the initial speed of the pallet is reduced, and consequently the reaction time of the circuit breaker following an electrical fault is relatively high.
  • CH-A-72323 discloses a magnetic actuator according to the preamble of claim 1.
  • the present invention aims to achieve an actuator and a circuit breaker incorporating it, having a reduced reaction time in case of occurrence of an electrical fault.
  • the subject of the present invention is a magnetic actuator, this actuator being characterized in that the said pallet is L-shaped and comprises a first arm articulated on the first branch of the cylinder head and a second arm substantially perpendicular to the first arm. , and cooperating with the second leg of the yoke, the second leg and the second arm each having at their free end a beveled portion, the two beveled portions being of complementary shape and adapted to be brought into a position in which said bevelled portions are facing one another and substantially parallel to each other, in the closed position of the pallet.
  • the air gap between the beveled parts and the bevelled parts themselves are arranged with respect to the axis of rotation, in such a way that the torque associated with the attraction force of the pallet on the cylinder head is maximum in the open position of the pallet and decreases when the pallet moves from the open position to the closed position.
  • an actuator A for use in an electrical protection device such as a circuit breaker.
  • This circuit breaker (not shown) is intended to be placed in an electrical circuit comprising electrical devices, in order to protect said devices in case of overcurrent or short circuit.
  • This actuator A is formed mainly by a ferromagnetic yoke 1 which consists of two lateral branches 2,3 connected by a base part 4.
  • the magnetic circuit thus formed is closed by a pallet 5 capable of pivoting about an axis of rotation X between an open position (Fig. 1) and a closed position (Fig.
  • the pallet 5 has a first end 5a articulated on the free end 2a of a 2, said first, branches 2, 3 of the yoke 1, and a second end 5b adapted to be brought facing the free end 3a of the second leg 3 of the yoke 1 in order to close the magnetic circuit
  • the pallet 5 is returned to the open position by a return spring, not shown.
  • This open position corresponds to a normal operating state of the circuit breaker.
  • This actuator A also comprises a coil 6 traversed by the current which must be monitored, and capable of generating, when an electrical fault occurs in the circuit, a magnetic flux capable of generating a magnetic attraction force between the second end 5b of the pallet 5 and the free end 3a of the second branch 3.
  • the pallet 5 pivots in the closing direction until its free end 5b comes into contact with the free end 3a of the second branch 3, which causes the triggering of the circuit breaker and / or the opening of the contacts of said circuit breaker.
  • the pallet 5 is shaped in L and comprises a first arm 7 mounted articulated by one 7a of its ends, on the free end 2a of the first branch 2, and a second arm 8 extending substantially perpendicularly to the first arm 7 and having a free end 8a (5b) intended to cooperate with the free end 3a of the second leg 3.
  • these two ends 8a, 3a each comprise a beveled portion a , b and a non-beveled portion c, d.
  • the non-bevelled portions c, d are respectively parallel to the first arm 7, as regards the pallet 5, and parallel to the base portion 4, as regards the second leg 3 of the yoke 1.
  • These two bevelled parts a, b form an angle with respect to the second arm 8 and the second arm 3 respectively of approximately 45 ° and are arranged in such a way that in the closed position of the pallet 5, they are opposite one another relative to the other by extending parallel to each other.
  • the pallet 5 and the yoke 1 are offset parallel to the longitudinal direction of the base portion 4.
  • the position of the gap e between the two ends 5b and 3a respectively of the pallet 5 and the second leg 3, and the arrangement of the bevelled portions a, b have been chosen so that, in the vicinity of the closed position of the pallet 5, the torque exerted at the gap e by the force F of attraction, relative to the axis of rotation, is zero.
  • the arrow F representing the force passes through the hinge axis X of the pallet 5, from which a zero torque results.
  • the gap e between the two free ends 5b, 3a is inside the coil 6, and in particular in the middle of its length.
  • the pallet 5 is open, which corresponds to a normal state of the circuit breaker and the circuit to be protected.
  • a magnetic flux is generated by the coil 6. If the attraction force generated by this flux is sufficient to counteract the return force of the spring, an effort will be generated on the free end 5b of the pallet 5 tending to bring it closer to the cylinder head 1.
  • the generated torque is very important when the gap e is maximum, as is illustrated in FIG. 3, from which it follows that the speed of movement at the beginning of opening is maximum.
  • FIG. 3 illustrates three curves u, v, w representing the evolution as a function of the value of the gap, respectively, of the torque generated by the main air gap situated between the free ends 5b, 3a of the pallet and of the second branch (curve u), the torque generated by the secondary gap at the axis of articulation X (curve v) and the sum of these two pairs (curve w).
  • the value of the gap e is represented on the abscissa x on the curve and varies from 0 to 4 mm, while the value of the forces developed is represented on the y-ordinate and varies from 0 to 200 mm.N.
  • Figure 4 also illustrates three curves u, v, w representing the same data but for an actuator using a pallet of the conventional type as shown in Figure 2a. It can be seen in FIG. 3 that the force initially generated when the pallet 5 is open, by the main air gap (curve u), is around 160 and is therefore very high compared with that (about 4 mm.N). generated in the case of using a standard palette. This is because, for the same opening stroke of the pallet, and taking into account the existence of bevelled parts, the value of the gap in the case of the invention is decreased, compared to that of the gap of the prior art in which the air gap corresponded to the stroke of the pallet.
  • the value of the force in an actuator according to the invention is greater than that generated in the prior art.
  • the distance between the direction of the force F and the X axis is maximum in the open position of the pallet, since this direction is parallel to the branches 2,3 of the cylinder head 1.
  • the value of the torque is maximum in this position.
  • the torque F generated by the main air gap decreases to a value of about 70 mm.N.
  • the arrow F illustrating the force turns in the counterclockwise direction to a position shown in Figure 2.
  • the direction of the force F substantially passes through the axis of rotation X and the couple is therefore of a very low value.
  • the presence of the air gap e inside the coil 6 and in particular in the middle of its length also contributes to increasing the force, since this makes it possible to channel the magnetic flux by limiting the magnetic leakage fluxes generated for high currents.
  • the force goes from a maximum value to a minimum value (FIG. 3), unlike in the case of the actuator of the prior art (FIG. the opposite occurs, and this despite an increase in the inertia of the palette.
  • this decay effect can be increased so as to obtain an electromagnetic brake of the pallet, preventing said pallet from impacting its end stop too violently.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Push-Button Switches (AREA)
  • Vehicle Body Suspensions (AREA)
  • Switches With Compound Operations (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)

Claims (8)

  1. Magnetisches Betätigungsglied (A), insbesondere zur Abschaltung der Kontakte eines Schaltgerätes wie eines Leistungsschalters und/oder zur Auslösung des genannten Leistungsschalters bei Auftreten eines elektrischen Fehlers, welches Betätigungsglied einen Magnetkreis umfasst, der aus einem ferromagnetischen Rückschlusseisen (1), das einen ersten (2) und einen zweiten (3), annähernd parallel zueinander verlaufenden und über einen quer angeordneten Fußsteg (4) verbundenen Schenkel aufweist, aus einem beweglichen Anker (5), der mit einem seiner Enden (5a) am freien Ende (2a) des ersten Schenkels angelenkt ist und über sein anderes Ende (5b) mit dem freien Ende (3a) des zweiten Schenkels zusammenwirkt, sowie einem Mittel zur Erzeugung eines Magnetfeldes (6) besteht, das in der Lage ist, den Anker drehwirksam zwischen einer offenen Ruhestellung des Ankers, die dem Normalbetriebszustand des Schaltgeräts entspricht, und einer aktiven Stellung zu verschieben, die dem Auftreten eines elektrischen Fehlers im Schaltgerät entspricht und in der das freie Ende (5b) des Ankers relativ zum freien Ende des zweiten Schenkels in einer Stellung mit minimalem magnetischen Widerstand gehalten wird, wobei der genannte Anker (5) L-förmig ausgebildet ist und einen an den ersten Schenkel (2) des Rückschlusseisens (1) angelenkten ersten Arm (7) sowie einen, annähernd senkrecht zum ersten Arm (7) verlaufenden und mit dem zweiten Schenkel (3) des Rückschlusseisens (1) zusammenwirkenden zweiten Arm (8) umfasst und an den freien Enden (8a, 3a) des zweiten Schenkels (3) und des zweiten Arms (8) jeweils eine abgeschrägte Fläche (a, b) ausgebildet ist, welche beiden abgeschrägten Flächen (a, b) aneinander angepasste Formen aufweisen und dazu ausgelegt sind, in eine Stellung verbracht zu werden, in der die genannten abgeschrägten Flächen (a, b) in der Schließstellung des Ankers (5) einander gegenüber liegen und annähernd parallel zueinander verlaufen, dadurch gekennzeichnet, dass der zweite Schenkel (3) außerdem an seinem freien Ende eine nicht abgeschrägte Endfläche (d) aufweist, dass der erste Arm (7) kürzer ist als der genannte Fußsteg (4) und dass der Luftspalt (e) zwischen den abgeschrägten Flächen (a, b) sowie die abgeschrägten Flächen selbst in Bezug zur Drehachse (X) des Ankers (5) so angeordnet sind, dass das Drehmoment, welches durch die vom Anker (5) auf das Rückschlusseisen (1) ausgeübte Anziehungskraft (F) erzeugt wird, in der Offenstellung des Ankers (5) maximal ist und beim Übergang des Ankers (5) von der Offenstellung in die Schließstellung abnimmt.
  2. Betätigungsglied nach Anspruch 1, dadurch gekennzeichnet, dass der Luftspalt (e) zwischen den abgeschrägten Flächen (a, b) sowie die abgeschrägten Flächen (a, b) selbst in Bezug zur Drehachse (X) des Ankers (5) so angeordnet sind, dass in der Nähe der Schließstellung des Ankers (5) die Wirklinie der Anziehungskraft (F) durch die genannte Drehachse (X) verläuft, wobei in dieser Stellung des Ankers (5) das Drehmoment null ist.
  3. Betätigungsglied nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der genannte Anker (5) über die genannte Stellung mit einem Drehmoment von null hinaus in Schließrichtung etwas weiter verschwenkt werden kann, wobei während dieses Zusatzhubs die Wirkrichtung des Drehmoments umgekehrt und so eine Abbremsung des Ankers (5) bewirkt werden.
  4. Betätigungsglied nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass bei Auslegung des Mittels zur Erzeugung des Magnetfeldes mit einer Spule (6) der als Hauptluftspalt (e) bezeichnete Luftspalt zwischen dem Ende (3a) des zweiten Schenkels (3) und dem freien Ende (5b) des Ankers (5) im Inneren der Spule (6) angeordnet ist.
  5. Betätigungsglied nach Anspruch 4, dadurch gekennzeichnet, dass der als Hauptluftspalt (e) bezeichnete Luftspalt auf halber Länge der Spule (6) angeordnet ist.
  6. Betätigungsglied nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass beiden freien Enden (5b, 3a) des Ankers (5) bzw. des zweiten Schenkels (3) jeweils eine abgeschrägte Fläche (a, b) und eine nicht abgeschrägte Fläche (c, d) aufweisen.
  7. Betätigungsglied nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Magnetkreis geblecht ausgeführt ist
  8. Leistungsschalter mit einem Betätigungsglied nach irgendeinem der vorhergehenden Ansprüche.
EP00410016A 1999-03-02 2000-02-16 Magnetischer Betätiger mit Klappanker, insbesondere für einen Schutzschalter, und Schutzschalter mit einem solchen Betätiger Expired - Lifetime EP1033736B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9902839A FR2790593B1 (fr) 1999-03-02 1999-03-02 Actionneur magnetique a palette en particulier pour disjoncteur et disjoncteur equipe d'un tel actionneur
FR9902839 1999-03-02

Publications (2)

Publication Number Publication Date
EP1033736A1 EP1033736A1 (de) 2000-09-06
EP1033736B1 true EP1033736B1 (de) 2006-07-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00410016A Expired - Lifetime EP1033736B1 (de) 1999-03-02 2000-02-16 Magnetischer Betätiger mit Klappanker, insbesondere für einen Schutzschalter, und Schutzschalter mit einem solchen Betätiger

Country Status (10)

Country Link
EP (1) EP1033736B1 (de)
CN (1) CN1181506C (de)
AT (1) ATE332569T1 (de)
DE (1) DE60029152T2 (de)
DK (1) DK1033736T3 (de)
ES (1) ES2265899T3 (de)
FR (1) FR2790593B1 (de)
NO (1) NO20000754L (de)
PL (1) PL194996B1 (de)
PT (1) PT1033736E (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020171519A1 (en) * 2001-05-17 2002-11-21 Siemens Energy & Automation, Inc. Clapper-type electromagnet assembly having v-shaped air gap for use in a circuit breaker trip unit
FR2972844B1 (fr) * 2011-03-15 2014-06-06 Schneider Electric Ind Sas Actionneur rotatif et contacteur comportant un tel actionneur
CN102522271B (zh) * 2011-12-31 2014-06-18 常熟开关制造有限公司(原常熟开关厂） 断路器用脱扣电磁铁
JP6161694B2 (ja) 2012-06-11 2017-07-12 ラビナル・エル・エル・シー テーパー部を有する強磁性もしくは磁性接極子を含む電気的スイッチング装置および継電器
CN105190797A (zh) * 2012-12-21 2015-12-23 费斯托股份有限两合公司 电动机械的驱动装置和磁阀

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL12289C (de) * 1914-11-30 1924-06-16
GB103641A (en) * 1916-01-10 1917-07-05 Bbc Brown Boveri & Cie An Improved Resilient Pivotal Connection between an Alternating Current Electro Magnet and its Armature.
FR613481A (fr) * 1925-07-20 1926-11-18 Jules Richard Sa Des Ets Perfectionnement aux électro-aimants
DE572086C (de) * 1931-06-16 1933-03-10 Aeg Magnet mit Gleitanker, insbesondere fuer UEberstromausloeser elektrischer Schalter
CH209749A (fr) * 1938-08-29 1940-04-30 Sodeco Compteurs De Geneve Electroaimant, applicable notamment aux installations téléphoniques.
DE1098589B (de) * 1954-03-18 1961-02-02 Siemens Ag Schnellausloeser, insbesondere zum Einbau in Motorschutzschalter

Also Published As

Publication number Publication date
ES2265899T3 (es) 2007-03-01
PL194996B1 (pl) 2007-07-31
FR2790593B1 (fr) 2001-05-04
DK1033736T3 (da) 2006-11-06
DE60029152T2 (de) 2007-05-31
PT1033736E (pt) 2006-10-31
DE60029152D1 (de) 2006-08-17
FR2790593A1 (fr) 2000-09-08
NO20000754L (no) 2000-09-04
ATE332569T1 (de) 2006-07-15
CN1181506C (zh) 2004-12-22
EP1033736A1 (de) 2000-09-06
CN1265513A (zh) 2000-09-06
NO20000754D0 (no) 2000-02-15
PL338665A1 (en) 2000-09-11

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