EP0436448B1 - Relais électromagnétique polarisé par un aimant permanent - Google Patents

Relais électromagnétique polarisé par un aimant permanent Download PDF

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Publication number
EP0436448B1
EP0436448B1 EP90420542A EP90420542A EP0436448B1 EP 0436448 B1 EP0436448 B1 EP 0436448B1 EP 90420542 A EP90420542 A EP 90420542A EP 90420542 A EP90420542 A EP 90420542A EP 0436448 B1 EP0436448 B1 EP 0436448B1
Authority
EP
European Patent Office
Prior art keywords
core
flux
yoke
relay according
permanent magnet
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
EP90420542A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0436448A1 (fr
Inventor
Pierre Schueller
Pierre Laffont
Bruno Querlioz
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin 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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0436448A1 publication Critical patent/EP0436448A1/fr
Application granted granted Critical
Publication of EP0436448B1 publication Critical patent/EP0436448B1/fr
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
    • 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
    • H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature

Definitions

  • Such a relay is described in document EP-A-187055.
  • the flux distributor and the permanent magnet are annular to allow the passage of the return spring which bears on the bottom of the magnetic circuit.
  • the other end of the spring is housed in a blind hole in the frame.
  • the spring housing inside a blind hole in the magnetic circuit increases the overall dimensions of the relay, and the mass of the movable armature.
  • the hole in the flux distributor does not ensure correct isolation of the magnetic attachment zone from the permanent magnet.
  • the tubular cylinder head is produced by an expensive bar turning operation.
  • the object of the invention is to increase the speed and reliability of a high-sensitivity polarized relay, and to reduce its overall dimensions and the manufacturing cost.
  • the relay according to the invention is characterized in that the return spring passes completely through the armature by being inserted between the flow distributor, and the outer end of a guide tube, which passes axially through a passageway of the second cylinder head, being secured to the frame.
  • the hole emerging from the armature, and the axial length less than half the overall length of the relay makes it possible to reduce the mass of the armature, which favors the speed of the relay during tripping.
  • the permanent magnet and the flow distributor have substantially identical outside diameters, corresponding to the internal diameter of the insulating sheath.
  • the shunt flux is then reduced to a minimum, which makes it possible to use a permanent magnet of reduced volume and cost.
  • the guide tube is shaped as a neck having an enlarged housing part of the frame, and a narrowed part capable of sliding in the lumen.
  • the sheath is provided with a connection base passing through an orifice in the bottom of the first cylinder head for the passage of the connection conductors of the coil.
  • the first cylinder head and / or the armature guide tube are produced by a deep drawing operation.
  • a high sensitivity electromagnetic relay 10 serves as a triggering member for a mechanism of an electric circuit breaker.
  • the relay 10 comprises a fixed magnetic circuit 12, and a movable armature 14 mounted for axial sliding in the direction of the longitudinal axis XX ′ between a position of attraction (half view from the right) and a tripping position half view from the left).
  • the magnetic circuit 12 is made of ferromagnetic material, and comprises a first tubular yoke 16 closed at one end by a bottom 18 extending perpendicular to the longitudinal axis XX ′.
  • the cylinder head 16 and the bottom 18 constitute the same part obtained by a deep drawing operation.
  • a second yoke 20 is attached to the open end of the first yoke 16 to close the magnetic circuit 12.
  • the two yokes 16,20 are assembled either by direct crimping or by by means of an additional cover 22 covering the first cylinder head 16, and having a front edge 24 capable of being folded over an annular shoulder 26 of the second cylinder head 20.
  • the cover 22 is made of a magnetic or non-magnetic material, and has a thickness less than that of the first cylinder head 16.
  • the magnetic circuit 12 is polarized by a magnet 28 with axial magnetization bearing on the bottom 18 inside the first yoke 16.
  • a flow distributor 30 is superimposed on the magnet 28, and cooperates directly with the pole surface 32 of the movable armature 14 through an axial air gap 33.
  • the magnet 28 and the flow distributor 30 have cylindrical shapes having substantially the same diameter.
  • the second cylinder head 20 is equipped with an internal tubular sleeve 34 made of ferromagnetic material partially extending in an annular space formed coaxially between the movable frame 14 and an insulating sheath 36 serving to support a cylindrical control coil 38.
  • the opposite end faces of the cylindrical sheath 36 are arranged between the bottom 18 and the second cylinder head 20 and one of them has a connection base 40 passing through an orifice 42 in the bottom 18 for the passage of the coil connection conductors 38 .
  • the coil 38 is mounted coaxially on the insulating sheath 36, the internal lateral wall of which has an annular protuberance 44 disposed axially between the free end of the sleeve 34 and the base 40.
  • the role of the protuberance 44 consists in wedging the distributor flux 30 against the magnet 28.
  • the central part of the flux distributor 30 is provided with a centering cleat 46, on which is threaded a return spring 48 urging the movable armature 14 towards the trigger position during the coil excitation 38.
  • the frame 14 is fixed inside the enlarged part of a neck-shaped guide tube 50, the end of the narrow part of which axially passes through a circular passageway 52 formed in a bearing 54 of the second cylinder head 20.
  • the spring 48 passes completely through the frame 14, bearing on the flow distributor 30 and the end of the guide tube 50.
  • the guide tube 50 is advantageously produced by a deep drawing operation of a non-magnetic or insulating material having a low coefficient of friction.
  • the frame 14 is fixed in the tube 50 by gluing or crimping.
  • the end of the tube 50 is capped by a cap 56 arranged as an external trigger button.
  • the axial length of the movable armature 14 is less than half the overall length of the relay 10 corresponding to the distance between the external faces of the bottom 18 and of the second cylinder head 20.
  • the mass of the movable assembly is thus reduced as a minimum allowing the speed of relay 10 to be increased.
  • the operation of the polarized relay 10 is similar to that described in the document EP-A-187055. Since the flux distributor 30 and the permanent magnet 28 have substantially identical external diameters, corresponding to the clearance close to the internal diameter of the sheath 36, the shunt flow Os which loops directly between the permanent magnet 28 and the first yoke 16 is very small. This results in a minimum overall size of the permanent magnet 28 formed in particular by a simple washer made of a rare earth material with very high coercivity. The operation of the relay 10 takes place by means of two predominant opposite fluxes, comprising the first magnetic polarization flux Or of the permanent magnet 28, and the second magnetic control flux Oc of the coil 38.
  • the coil 38 is not excited and the armature 14 is held in the position of attraction against the flux distributor 30 by the action of the first polarization flux Ou.
  • the second opposite control flow Oc only appears when the coil 38 is energized by the trigger signal. As soon as the return force of the spring 48 becomes greater than the magnetic attraction force, the armature 14 and the guide tube 50 are propelled towards the release position (half view from the left).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
EP90420542A 1990-01-05 1990-12-12 Relais électromagnétique polarisé par un aimant permanent Expired - Lifetime EP0436448B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000142 1990-01-05
FR9000142A FR2656953B1 (fr) 1990-01-05 1990-01-05 Relais electromagnetique polarise par un aimant permanent.

Publications (2)

Publication Number Publication Date
EP0436448A1 EP0436448A1 (fr) 1991-07-10
EP0436448B1 true EP0436448B1 (fr) 1994-12-07

Family

ID=9392584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90420542A Expired - Lifetime EP0436448B1 (fr) 1990-01-05 1990-12-12 Relais électromagnétique polarisé par un aimant permanent

Country Status (10)

Country Link
US (1) US5126710A (pt)
EP (1) EP0436448B1 (pt)
JP (1) JPH04212230A (pt)
CA (1) CA2033522C (pt)
DE (1) DE69014849T2 (pt)
ES (1) ES2067714T3 (pt)
FR (1) FR2656953B1 (pt)
HK (1) HK1006891A1 (pt)
PT (1) PT96423B (pt)
ZA (1) ZA9140B (pt)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9115607U1 (de) * 1991-12-17 1992-02-13 ABB Patent GmbH, 6800 Mannheim Leitungsschutzschalter
DE4344143B4 (de) * 1993-12-23 2004-04-01 Moeller Gmbh Elektromagnetischer Schnellauslöser für elektrische Schaltgeräte
US5597930A (en) * 1995-05-18 1997-01-28 Bayer Corporation Aspartate-functional polyhydantoin prepolymers and their use in coating compositions
US5596044A (en) * 1995-05-18 1997-01-21 Bayer Corporation Hydroxy-functional prepolymers containing hydantoin group precursors and their use in coating compositions
ES2199897T3 (es) * 1999-12-15 2004-03-01 First Inertia Switch Limited Dispositivo y procedimiento para la desconexion de baterias.
DE102009015833B4 (de) * 2009-04-01 2011-04-28 Hydac Electronic Gmbh Elektromagnetische Stellvorrichtung
DE102009049009B4 (de) * 2009-10-09 2012-10-04 Pierburg Gmbh Aktuator für eine Verbrennungskraftmaschine
DE102012213660A1 (de) * 2012-08-02 2014-02-06 Schaeffler Technologies AG & Co. KG Magnetaktor eines Schiebenockensystems
FR2997546B1 (fr) * 2012-10-26 2016-04-01 Valeo Sys Controle Moteur Sas Actionneur electromagnetique lineaire
JP6172065B2 (ja) * 2013-09-19 2017-08-02 アンデン株式会社 電磁継電器
CN113299527B (zh) * 2021-07-26 2021-11-12 广东电网有限责任公司东莞供电局 一种永磁体可移动式中低压断路器驱动装置及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984795A (en) * 1976-02-09 1976-10-05 I-T-E Imperial Corporation Magnetic latch construction
FR2412160A1 (fr) * 1977-12-19 1979-07-13 Alsthom Cgee Dispositif electromecanique de percussion
FR2535107A1 (fr) * 1982-10-21 1984-04-27 Alsthom Atlantique Percuteur a grande sensibilite
FR2573570B1 (fr) * 1984-11-22 1988-05-27 Merlin Gerin Relais electromagnetique polarise a accrochage magnetique pour un declencheur d'un disjoncteur electrique
CA1294305C (en) * 1987-08-25 1992-01-14 Donald R. Boyd Tripping coil with flux shifting coil and booster coil

Also Published As

Publication number Publication date
PT96423A (pt) 1992-09-30
DE69014849D1 (de) 1995-01-19
EP0436448A1 (fr) 1991-07-10
PT96423B (pt) 1998-06-30
ZA9140B (en) 1991-10-30
US5126710A (en) 1992-06-30
DE69014849T2 (de) 1995-06-08
FR2656953B1 (fr) 1996-08-30
HK1006891A1 (en) 1999-03-19
ES2067714T3 (es) 1995-04-01
CA2033522C (en) 2000-08-08
JPH04212230A (ja) 1992-08-03
FR2656953A1 (fr) 1991-07-12
CA2033522A1 (en) 1991-07-06

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