EP0159207B1 - Schnelle Überstrom-Auslösevorrichtung - Google Patents

Schnelle Überstrom-Auslösevorrichtung Download PDF

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Publication number
EP0159207B1
EP0159207B1 EP85400257A EP85400257A EP0159207B1 EP 0159207 B1 EP0159207 B1 EP 0159207B1 EP 85400257 A EP85400257 A EP 85400257A EP 85400257 A EP85400257 A EP 85400257A EP 0159207 B1 EP0159207 B1 EP 0159207B1
Authority
EP
European Patent Office
Prior art keywords
core
yoke
nose
coil
projecting
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
Application number
EP85400257A
Other languages
English (en)
French (fr)
Other versions
EP0159207A1 (de
Inventor
Luc Moreau
Pierre Lemarquand
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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 La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Publication of EP0159207A1 publication Critical patent/EP0159207A1/de
Application granted granted Critical
Publication of EP0159207B1 publication Critical patent/EP0159207B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • 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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to rapid overcurrent release devices used in small short-circuit protection devices. These devices include a winding associated with a magnetic circuit comprising a yoke, a fixed core and a movable core with low inertia for the mechanical control of the cut-out of the associated protective device, the cores being of complementary shapes and arranged in the same plan by delimiting between them an air gap placed in the region of maximum flux.
  • the object of the present invention is in particular to optimize in a very simple manner the evolution of the force of attraction produced between the fixed core and the movable core as a function of their air gap. It also aims to facilitate the realization, in a space and with a reduced cost, of a quick release device for thin protective device.
  • this result is achieved in a device of the type described in the preamble and is characterized in that the two cores are obtained by flat cutting and have complementary profiles of generally curvilinear shape, that of the two cores which is projecting comprising a nose and a body, the nose being connected to the body by sides whose slope with respect to the main axis of the projecting core gradually increases from the nose to the body.
  • the protruding nose core thus has a relatively tapered end along a main axis and inscribed inside a triangle whose base is of dimension equal to the width of the core body and whose height is substantially carried by the axis main nucleus.
  • the attraction force between the cores remains substantially constant over a wide range thanks to the progressive variation in the slope of their sides, the variation of this slope being for example between approximately 5 ° near the nose and 90 ° near the body of the projecting core.
  • the absence on each core of sides parallel to their main axis removes from the effort / gap curve any bump detrimental to the acceleration of the movable core.
  • the end of the nose of the projecting core may have a width - and / or the curvilinear sides of this core may have sections cut to length - at least equal to the thickness of the sheet from which the core is cut.
  • the fixed core may advantageously have at least one flat which is housed in a corresponding opening on one face of the cylinder head or of the protective device, while the movable core is mounted in an oblong guide window formed in a parallel face. of the breech.
  • the fixed cut core forms, for example, a flow closure bridge, the ends of which constitute the support flats.
  • the trigger device shown in the figures comprises a magnetic circuit with yoke 1, for example made of electrolytic copper-plated steel or of colaminated steel and copper, and a flat movable core 3, as well as a flat fixed core 2, of complementary profiles obtained by cutting and located in the same plane.
  • the movable core 3 plays the role of a rapid magnetic trigger capable of acting, as a function of the current flowing in a coil 4 supported by an insulating carcass in the form of a sheath 5, on a protection device not shown by means of a transmission mechanism also not shown.
  • the movable core is housed so that it can slide in a window 6 formed in a branch 7 of the cylinder head, the latter having, on the other hand, as the case may be, an opposite parallel branch 8 and two lateral branches 9, 10 (FIGS. 1 and 2) or only two lateral branches 9, 10 ( Figures 3 and 4).
  • the fixed core 2 has a nose or nipple-shaped end 11 a, a body 11 b and a particular curvilinear profile for connecting the nose to the body, the role of which, in connection with a recess 12 with a complementary profile. of the mobile core 3, will be explained later.
  • the protruding core here represented by the fixed core can also well be constituted by the mobile core; the two cores could also be mobile.
  • the fixed core 2 is engaged and crimped by means of a flat 13 in a window 14 of the branch 8 of the cylinder head; this therefore offers a U shape closed by the branch 7 constituted by a nested bar and crimped on the branches 9, 10 (FIG. 1) or consists of two L, 1a, 1b, nested and comprising one of the branches 7, 10 and the other the branches 8, 9 ( Figure 2).
  • the cylinder head consists of a single U-shaped piece comprising the three branches 7, 9, 10; the fixed core 2 has, at its rear part, a bridge 15 for closing the flow provided with two lateral flats 16, 17 allowing the core 2 to be fixed by welding to shoulders 18, 19 (FIG. 3) or by crimping and / or welding in slots 20, 21 (FIG. 4), the shoulders or the slots coming from cutting at the ends of the branches 9, 10 of the cut cylinder head 1.
  • notch 22 for passage for a coil connection wire 4 and in branch 9 of the cylinder head, a notch 23 for passage of the other coil connection wire.
  • the first connection wire is welded to the notch 22 and the corresponding branch of the cylinder head acts as a support for the fixed contact of the protective device, including the support not shown the movable contact cooperates directly with the outer face of the branch 9; the output of the coil through the notch 23 is obviously isolated.
  • Notches such as 24 are provided in the fixed core 2 to facilitate the positioning of the coil 4 and its carcass 5.
  • the coil carcass and the fixed core 2 are supported by an insulating part not shown possibly coming from molding with the protective device, and the cylinder head 1 takes a simplified shape in L one of the branches 25 of which comprises the window 6 for guiding the movable core 3 and the other branch 26 of which serves as a support for the fixed contact of the protective device.
  • One of the connection wires can be welded to the branch 25 of the cylinder head at 27, the other to a notch 28 formed on the fixed core.
  • the trigger shown in FIG. 7 can be given the evolution of the attraction force F as a function of the air gap "e".
  • curve III in solid line obtained thanks to the trigger of the invention produces a work area Z of substantially constant effort.
  • a preferred profile of the end of the fixed protruding core 2 is illustrated in FIG.
  • the slope of the curvilinear sides 29 connecting the nose 11 a to the body 11 b of the projecting core gradually increases by approximately 5 ° to 90 ° from the nose towards the body; the width "e" of the end of the nose 11 a is at least equal to the thickness "e" of the sheet from which the core is cut; similarly, the width "e” of cut sections provided at the base of the curvilinear sides 29 is at least equal to the thickness "e” of the sheet.
  • the force and acceleration communicated to the movable core during actuation of the trigger are thus made substantially constant over a wide range by means of extremely simple arrangements.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Breakers (AREA)

Claims (11)

1. Schnelle Überstrom-Auslösevorrichtung für ein Schutzgerät im Falle von Kurzschlüssen, mit einer Wicklung (4) die einem Magnetkreis zugeordnet ist, welcher ein Joch (1) und zwei Kerne (2, 3) enthält, von denen mindestens einer (3) beweglich ist, um die Ausschaltung des Schutzgerätes zu steuern, wobei die Kerne (2, 3) komplementäre Formen besitzen, in derselben Ebene angeordnet sind und zwischen ihnen ein Luftspalt besteht, dadurch gekennzeichnet, dass die beiden Kerne (2, 3) durch Flachstanzen hergestellt werden und komplementäre, im wesentlichen gekrümmte Umrisse haben, wobei derjenige (2) der zwei Kerne (2, 3), welcher vorspringt, eine Nase (11a) und einen Körper (11b) besitzt und die Nase mit dem Körper durch Flächen (29) verbunden ist, deren Neigung im Verhältnis zur Hauptachse (X-X) des vorspringenden Kerns von der Nase zum Körper hin allmählich zunimmt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Ende des Kerns (2) mit der vorspringenden Nase (11a) in einem Dreieck liegt, dessen Basis (30) die gleiche Grösse hat wie die Breite des Kernkörpers und dessen Höhe im wesentlichen entlang der Hauptachse (X-X) des Kerns verläuft.
3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die allmähliche Neigungsänderung der gekrümmten Seiten (29) des hervorspringenden Kerns (2) zwischen 5° in der Nähe der Nase (11a) und 90° in der Nähe des Körpers (11b) des Kerns verläuft.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Breite (e1) des Nasen (11a) endes des vorspringenden Kerns (2) mindestens gleich der Dicke des Blechs ist, aus dem der Kern ausgestanzt wurde.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die gekrümmten Seiten (29) des Kerns (2) am Verbindungspunkt mit dem Körper (11b) des Kerns zugeschnittene Flächen haben, deren Länge (e2) mindestens gleich der Blechdicke ist.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der unbewegliche Kern (2) mindestens eine Abflachung (13, 16, 17) besitzt, welche sich in eine entsprechende Öffnung (14, 18, 19) in einer Fläche (8) des Jochs (1) oder des Schutzgerätes einfügt, während der bewegliche Kern (3) in eine parallele Fläche (7, 25) des Jochs eingebaut ist.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Joch (1) die Form eines U besitzt und der flache unbewegliche Kern (2) eine Brücke (15) zur Stromunterbrechung bildet, deren Enden die Abflachungen (16,17) bilden, welche auf Schultern (18, 19) aufliegen oder in Schlitzen (20, 21) der seitlichen Schenkel (9, 10) des Jochs angeordnet sind.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass einer (10) der seitlichen Schenkel des U-förmigen Jochs (1) elektrisch bei (22, 27) mit einem der Verbindungsdrähte der Wicklung (4) verbunden ist und den Träger für den festen Kontakt des Schutzgerätes bildet.
9. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Joch (1) die Form eines L hat, in dessen einem Schenkel (25) das Führungsfenster (6) des beweglichen Kerns (3) angeordnet ist und dessen anderer Schenkel (26) den Träger für den festen Kontakt des Schutzgerätes bildet und elektrisch an einen der Verbindungsdrähte der Wicklung (4) angeschlossen ist, während der unbewegliche, gegenüber dem L-förmigen Joch isolierte Kern (2) den Träger für den Wicklungskörper (5) bildet und elektrisch an einen anderen Verbindungsdraht der Wicklung angeschlossen ist.
10. Schutzgerät gegen Kurzschlüsse mit der Schnellauslösevorrichtung nach einem der Ansprüche 1 - 9.
EP85400257A 1984-03-20 1985-02-14 Schnelle Überstrom-Auslösevorrichtung Expired EP0159207B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404260A FR2561818B1 (fr) 1984-03-20 1984-03-20 Dispositif de declenchement rapide a maximum de courant
FR8404260 1984-03-20

Publications (2)

Publication Number Publication Date
EP0159207A1 EP0159207A1 (de) 1985-10-23
EP0159207B1 true EP0159207B1 (de) 1987-07-22

Family

ID=9302213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400257A Expired EP0159207B1 (de) 1984-03-20 1985-02-14 Schnelle Überstrom-Auslösevorrichtung

Country Status (5)

Country Link
US (1) US4605918A (de)
EP (1) EP0159207B1 (de)
JP (1) JPS60212937A (de)
DE (1) DE3560377D1 (de)
FR (1) FR2561818B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355108A (en) * 1992-10-05 1994-10-11 Aura Systems, Inc. Electromagnetically actuated compressor valve
DE19841499A1 (de) * 1998-09-10 2000-03-30 Beru Ag Hubmagnet
CN104485194B (zh) * 2014-12-14 2016-08-17 成都大学 一种变磁力线分布比例电磁铁

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992304A (en) * 1958-01-06 1961-07-11 Cook Electric Co Electromagnetic thrust motor
FR1529258A (fr) * 1967-06-27 1968-06-14 Binder Magnete électro-aimant à noyau plongeur
US3593240A (en) * 1969-03-10 1971-07-13 Whirlpool Co Solenoid structure having single sheet metal plunger and/or yoke
DE3175082D1 (en) * 1981-12-14 1986-09-11 Sprecher & Schuh Ag Pair of iron cores, and coil form bobbin for alternating current protection
US4441830A (en) * 1982-03-29 1984-04-10 Ncr Corporation Printing solenoid
FR2527831B1 (fr) * 1982-05-28 1986-08-29 Telemecanique Electrique Noyau plongeur, procede pour le fabriquer et relais a seuil d'intensite ainsi equipe

Also Published As

Publication number Publication date
EP0159207A1 (de) 1985-10-23
FR2561818A1 (fr) 1985-09-27
DE3560377D1 (en) 1987-08-27
JPS60212937A (ja) 1985-10-25
FR2561818B1 (fr) 1988-04-15
US4605918A (en) 1986-08-12

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