EP0225236B1 - Elektromagnetisches Relais - Google Patents

Elektromagnetisches Relais Download PDF

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Publication number
EP0225236B1
EP0225236B1 EP19860402438 EP86402438A EP0225236B1 EP 0225236 B1 EP0225236 B1 EP 0225236B1 EP 19860402438 EP19860402438 EP 19860402438 EP 86402438 A EP86402438 A EP 86402438A EP 0225236 B1 EP0225236 B1 EP 0225236B1
Authority
EP
European Patent Office
Prior art keywords
yoke
branches
vertical
permanent magnet
relay
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
EP19860402438
Other languages
English (en)
French (fr)
Other versions
EP0225236A1 (de
Inventor
Pierre Le Rolland
Jean-Yves Potiron
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.)
ITT Inc
Original Assignee
ITT Industries Inc
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 ITT Industries Inc filed Critical ITT Industries Inc
Publication of EP0225236A1 publication Critical patent/EP0225236A1/de
Application granted granted Critical
Publication of EP0225236B1 publication Critical patent/EP0225236B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
    • H01H71/323—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with rotatable armature

Definitions

  • the present invention relates to an electromagnetic relay. It more especially concerns a so-called “differential" relay designed to ensure the opening of a circuit breaker which cuts off the power supply from the circuit when a fault current develops in the user circuit.
  • Patent application FR-A-2 371 766 describes and illustrates an electromagnetic relay containing a magnetic circuit consisting of a yoke with two vertical branches between the bases whereof a permanent magnet is installed and of a moving flap closing the magnetic circuit, together with a control circuit coiled on one of the vertical branches of the yoke.
  • a spring subjects the moving flap to a flexible return force slightly less than the holding attraction force due to the magnetic flux created by the permanent magnet.
  • This document proposes doing away with the necessity of shunting the permanent magnet via a shunt branch, by using a permanent magnet in a very costly semi-remanent material; moreover it only proposes a basic pattern for the structure of the magnetic circuit without proposing the method of embodiment, easy to industriiialize.
  • Document FR-A-2 448 784 describes and illustrates a type of electromagnetic relay currently employed in the field of safety contactors in which the permanent magnetic is installed below the lower branch of the magnetic yoke. This arrangement, apart from the fact that it requires a more powerful permanent magnet, increases the overall height of the relay.
  • the purpose of the present invention is to propose an electromagnetic relay which remedies the drawbacks latent in the types of relay which have just been described.
  • the invention proposes an electromagnetic relay, characterized in that the bases of the said vertical branches are connected together by a horizontal magnetic shunt branch parallel to the lines of force of the magnetic flux created by the permanent magnet.
  • the said vertical branches and the said horizontal branch form a single part in magnetic material obtained by cutting out a plate and bending it parallel to the vertical direction of the said branches.
  • the electromagnetic relay 10 shown in the drawings contains a housing 12, closed by a cover 14, which contains the magnetic circuit of the relay and its control circuit.
  • the magnetic circuit basically consists of a yoke 16 and a flap 18 closing the magnetic circuit.
  • Yoke 16 contains two branches 20, 22 parallel and vertical (as shown in the drawings).
  • a permanent magnet 24 is installed between the respective bases 26, 28 of the vertical branches 20, 22 of the yoke.
  • the permanent magnet has a rectangular parallelepipedic form and its two parallel polar faces 30, 32 are placed parallel to the vertical plane in which branches 20 and 22 of yoke 16 extend.
  • the two vertical branches 20 and 22 are connected together by a horizontal magnetic shunt branch 34 which extends perpendicularly to the vertical plane of the two branches whose bases 26, 28 it connects, and parallel to the lines of force of the magnetic flux created by the permanent magnet 24.
  • yoke 16 consists of a single part formed of the two vertical branches 20, 22 and of connec ting branch 34.
  • Yoke 16 can be produced very simply by cutting out the developed structure of the yoke in a thick plate, in magnetic material, then through two successive bending operations along a direction parallel to the vertical direction of the two branches.
  • the closing flap 18 is hinged to yoke 16 close to the free end of branch 22 via a fastener 36 crimped to the said branch.
  • a return spring 38 whose one end is secured to the fastener, and whose other end is secured to flap 18 applies to the latter an elastic return force slightly less than the holding attraction force due to the permanent magnet 24.
  • the circuit controlling the relay here consists of a coil 40 wound round branch 20 of the yoke.
  • the differential relays of the type just described are high sensitive relays, and so as to maintain the sensitivity as constant as possible in the course of time, it is necessary to provide for certain positioning of the permanent magnet in relation to the yoke.
  • the yoke is inserted vertically into grooves 44, 46 in the housing which co-operate with the lateral faces 48, 50 opposite vertical branch 22. In this way yoke 16 is locked in position transversally in relation to housing 12.
  • the yoke is inserted into housing 12 with the permanent magnet 24 installed between bases 26, 28 and horizontal branch 34 between which it is not yet positioned accurately.
  • the lower face 52 of magnet 24 bears on the frame of coil 20 so as to define the height of the latter in relation to the horizontal plane delimiting bases 26, 28 of the vertical branches 20, 22.
  • Cover 14 whose position in relation to housing 12 is defined exactly when closing the housing, contains a rectangular parallelepipedic recess 54.
  • Two inclined faces 72, 74 located on sides 56 and 58 of recess 54 co-operate with the flat faces 82 and 84 of bases 26 and 28 of yoke 16 so as to lock the latter in position in housing 12.
  • the magnet always occupies the same transverse position in relation to the vertical branches 20, 22 of yoke 16 and a constant air gap is maintained between the polar face of 32 of magnet 24 and the inner face 64 of the vertical branch 22.
  • the final setting of the relay's sensitivity is only made after it has been fully assembled and inserted into the circuit whose safety it ensures, by modifying the magnetization of the permanent magnet. This latter operation is made very easy through the position of yoke 16 and magnet 24 located in recess 54 of the cover, on either side of which two polar branches can be brought close to a magnetiza- tion/demagnetization device.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Claims (5)

1. Elektromagnetisches Relais (10), enthaltend einen Magnetkreis aus einem Joch (16) mit zwei senkrechten Schenkeln (20, 22) an den Grundflächen (26, 28), zwischen denen ein Dauermagnet (24) und eine bewegliche den Magnetkreis schließende Klappe (18), angeordnet sind, sowie ferner enthaltend einen Steuerkreis (40), der um den einen (20) der Schenkel (20, 22) gewickelt ist, dadurch gekennzeiechnet, daß die Grundflächen (26, 28) der senkrechten Schenkel (20, 22) durch einen waagrechten, einen magnetischen Nebenschluß bewirkenden Steg (34) verbunden sind, der parallel zu den Kraftlinien des durch den Dauermagneten erzeugten Magnetflusses liegt.
2. Relais nach Anspruch 1, dadurch gekennzeichnet, daß die senkrechten Schenkel (20, 22) und der waagrechte Steg (34) ein einteiliges Joch (16) aus magnetischem Material bilden.
3. Relais nach Anspruch 2, dadurch gekennzeichnet, daß das Joch (16) durch Ausschneiden aus einer Platte von magnetischem Material und Umbiegen parallel zu der senkrechten Richtung der Schenkel (20, 22) hergestellt wird.
4. Relais nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Dauermagnet (24) ein rechtwinkliger, ein Parallelepiped darstellender Magnet ist, dessen zwei Polflächen (30, 32) parallel zu der senkrechten Ebene der Schenkel liegen.
5. Relais nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß es ein Gehäuse (12) enthält, in dem das Joch (16) eingesetzt ist, wobei das Gehäuse (12) durch einen Deckel (14) verschlossen ist, der eine Aussparung (54) enthält, deren Flächen (58) und (68) mit den dem Dauermagnet gegenüberliegenden Flächen (32) und (70) zusammenwirken, um dessen Position bezüglich der beiden senkrechten Schenkel festzulegen.
EP19860402438 1985-10-31 1986-10-30 Elektromagnetisches Relais Expired EP0225236B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8516188A FR2589623B1 (fr) 1985-10-31 1985-10-31 Relais electromagnetique
FR8516188 1985-10-31

Publications (2)

Publication Number Publication Date
EP0225236A1 EP0225236A1 (de) 1987-06-10
EP0225236B1 true EP0225236B1 (de) 1989-06-28

Family

ID=9324388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860402438 Expired EP0225236B1 (de) 1985-10-31 1986-10-30 Elektromagnetisches Relais

Country Status (3)

Country Link
EP (1) EP0225236B1 (de)
DE (1) DE3664176D1 (de)
FR (1) FR2589623B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130048A (en) * 1988-03-04 1992-07-14 Displaytech, Inc. Ferroelectric liquid crystal compositions containing chiral haloalkoxy tails units
USRE34726E (en) * 1988-03-04 1994-09-13 Displaytech, Inc. Ferroelectric liquid crystal compositions containing chiral haloalkoxy tail units
US5180520A (en) * 1988-03-04 1993-01-19 University Research Corporation Ferroelectric liquid crystal compositions containing halogenated cores and chiral halogenated cores and chiral haloalkoxy tail units
US5167855A (en) * 1988-03-04 1992-12-01 University Research Corporation Ferroelectric liquid crystal compositions chiral haloalkoxy tail units
FR2644285B1 (fr) * 1989-03-08 1994-07-01 Itt Composants Instr Relais electromagnetique, notamment pour la commande d'un disjoncteur ou d'un interrupteur differentiel
DE4240031A1 (de) * 1992-11-28 1994-06-01 Felten & Guilleaume Energie Magnetauslöser für Fehlerstromschutzschalter
DE19820768A1 (de) * 1998-05-08 1999-11-11 Siemens Ag Haltemagnetauslöser
FR2823369B1 (fr) * 2001-04-06 2003-10-24 Realisation De Disjoncteurs So Declencheur electromagnetique comportant un circuit electromagnetique reposant sur un socle deformable elastiquement et declencheur electromagnetique comprenant une bobine flottante

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1277420B (de) * 1963-12-03 1968-09-12 Siemens Ag Haltemagnet fuer Selbstschalter, insbesondere Fehlerstromschutzschalter
FR2371766A1 (fr) * 1976-11-23 1978-06-16 Metalimphy Relais polarise
EP0006829A1 (de) * 1978-06-29 1980-01-09 CMC Carl Maier + Cie AG Magnetauslöser für Fehlerstromschutzschalter
DE2905275A1 (de) * 1979-02-12 1980-08-21 Felten & Guilleaume Carlswerk Magnetsystem fuer einen ausloeser, insbesondere in einem fehlerstrom-schutzschalter

Also Published As

Publication number Publication date
DE3664176D1 (en) 1989-08-03
EP0225236A1 (de) 1987-06-10
FR2589623A1 (fr) 1987-05-07
FR2589623B1 (fr) 1989-12-22

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