EP0169748B1 - Dispositif amortisseur de surtensions pour électroaimant et électroaimant équipé d'un tel dispositif - Google Patents

Dispositif amortisseur de surtensions pour électroaimant et électroaimant équipé d'un tel dispositif Download PDF

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Publication number
EP0169748B1
EP0169748B1 EP85401063A EP85401063A EP0169748B1 EP 0169748 B1 EP0169748 B1 EP 0169748B1 EP 85401063 A EP85401063 A EP 85401063A EP 85401063 A EP85401063 A EP 85401063A EP 0169748 B1 EP0169748 B1 EP 0169748B1
Authority
EP
European Patent Office
Prior art keywords
magnetic circuit
electromagnet
fixed magnetic
mobile
air gap
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
EP85401063A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0169748A1 (fr
Inventor
Alain Brisson
Jean René Clément
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 EP0169748A1 publication Critical patent/EP0169748A1/fr
Application granted granted Critical
Publication of EP0169748B1 publication Critical patent/EP0169748B1/fr
Expired 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
    • H01H50/44—Magnetic coils or windings
    • H01H50/46—Short-circuited conducting sleeves, bands, or discs
    • 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
    • H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
    • H01F7/12—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements
    • H01F7/1205—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements having short-circuited conductors
    • 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

Definitions

  • the present invention relates to an overvoltage damping device for an electromagnet as well as an electromagnet equipped with such a device.
  • It relates more particularly to a device capable of ensuring at least two functions, namely: a function of limiting overvoltage cut-off of the electromagnet and a function of destroying the remanent induction of the magnetic circuit of the electromagnet when the control coil is not energized.
  • the elimination of the residual induction of the magnetic circuit when the control coil is not supplied is obtained by defining air gaps in the closed state of the electromagnet, by means of parts made of non-magnetic material which may also have damping properties.
  • the function of limiting cut-off overvoltages is ensured by means of a ring produced by cutting and bending a thin strip, and mounted on the core of the magnetic circuit.
  • molded rings for example made of silicone elastomer, mounted on the two lateral wings of the fixed magnetic circuit and on which the ends of the lateral wings of the mobile magnetic circuit come to bear.
  • the invention therefore more particularly aims to eliminate this drawback.
  • the overvoltage damping device in an electromagnet comprising a fixed magnetic circuit and a mobile magnetic circuit cooperating with the fixed magnetic circuit and forming, with the latter, in the "closed" position, at least one air gap, the overvoltage damping device according to the invention is consists of a ring mounted in short circuit on the fixed magnetic circuit so as to absorb overvoltages due to variations in the magnetic flux when the electromagnet is controlled, this ring being constituted by an electrically good and non-magnetic strip and comprising at least one part shaped so as to extend into said air gap.
  • the two wings of the short-circuited ring will only serve to participate in the guidance during the start of closing and do not will not have a function for defining the final air gap (anti-remanent air gap) since this function remains provided by the elastomer rings.
  • the first solution in which the overvoltage limitation ring simultaneously ensures the air gap centering guide at closing and the anti-persistence is more advantageous.
  • the fixing and centering of the fixed magnetic circuit 2 in the coil 13 are ensured by a cylindrical stud 19.
  • the invention is not limited to such an arrangement.
  • the fixed magnetic circuit 2 could, for example, simply be force-fitted into the carcass 14 of the coil 13.
  • the mobile magnetic circuit 5 comprises a key 21 cooperating with an axial groove provided in the carcass 14 of the coil 13.
  • the shapes of the air gaps 10 and 11 are determined during design to adapt the law of variation of the motor force to the resistant force.
  • the end of the central wing 9 of the fixed magnetic circuit has a V-shaped profile concavity, 24, in which the end 25 of the central wing 7 of the mobile magnetic circuit 5 which consequently has a substantially complementary convex V shape.
  • These two complementary shapes 24, 25 determine an air gap 11 substantially in the form of a V.
  • the ends of the two lateral wings 8 of the fixed magnetic circuit 2 each comprise a chamfered outer face 26, 27, and the ends of the two lateral wings 6 of the movable magnetic circuit 5 each comprise an chamfered inner face 28, 29, the faces chamfered outer 26, 27 of the fixed magnetic circuit 2 cooperating with the chamfered inner faces 28, 29 of the movable magnetic circuit 5 to form two lateral gaps 10 oblique to each other.
  • the overvoltage limitation function is obtained using a strip of copper alloy folded so as to have a U-shaped section, the core of which comprises a substantially rectangular central recess.
  • This strip is disposed on the core 3 of the fixed magnetic circuit 2 which it partially envelops, the central wing 9 passing through the recess. It performs the function of a short-circuit ring to absorb overvoltages when switching off by consuming energy during flow variations in the central wing 9 of the magnetic circuit.
  • the anti-persistence and damping function is, for its part, obtained by two dampers 35 each consisting of a ring of rectangular section made of silicone elastomer obtained by molding. They are fitted onto two respective studs 45 provided on the outer faces of the lateral wings 8 of the fixed magnetic circuit 2, substantially at the base of the chamfered faces 26, 27.
  • pins 45 are obtained by cutting the magnetic sheets at an appropriate angle 46 to facilitate the assembly of the rings constituting the shock absorbers 35.
  • shock absorbers 35 on which abuts the end of the wings 6 of the mobile magnetic circuit 5, makes it possible, in addition to the role of shock absorber, to provide the anti-persistence function of the air gaps 10, 11 materialized by the non-magnetic elastomer .
  • the choice of a silicone elastomer results from the requirements of the resistance of the antiremantent damper to the working temperatures of the electromagnet to sheet cutting oils and the high mechanical endurance.
  • the qualities of non-adhesion (exfoliation) of such an elastomer are useful. to guarantee the take-off of the mobile circuit over time when the power supply to the electromagnet is cut. It is obvious that any non-magnetic material having mechanical damping properties and suitable for the requirements of endurance resistance and environmental conditions can be used in the context of the invention.
  • FIG. 3 represents an overvoltage damping ring 50 according to the invention which makes it possible to avoid this problem of sticking.
  • This ring more particularly comprises a body similar to the ring used in FIG. 1 and which consequently has a U-shaped section, the core 51 of which has a substantially rectangular central recess 52, through which the wing can pass. central 9 of the fixed magnetic circuit 2.
  • the core 52 is extended, at each of its ends, by a tab 53, 54 having a first part folded at right angles 55, 56 which comes to extend against the inner face of a corresponding lateral wing 8 of the fixed magnetic circuit 2, this part 55, 56 itself being extended by an obliquely folded part 57, 58 which covers the chamfered outer face 26, 27 of the end of said lateral wing 8.
  • This ring 50 is made from a strip of non-magnetic material having both a high electrical conductivity and anti-friction properties, so that in addition to its function of limiting overvoltages, it allows thanks to the oblique parts 57, 58 a guiding the mobile magnetic circuit 5 without risk of sticking and the materialization of the air gaps 10 during closing.
  • the anti-persistence is provided by the shock absorbers 35. It is clear that if these shock absorbers were not used, the oblique parts of the ring, on which the chamfered ends would then come to abut the end of the closing stroke 28 , 29 of the lateral wings 6, 7 of the mobile magnetic circuit 5, would then alone carry out the anti-persistence function.
  • the invention is not limited to the shape of the electromagnet described above, and the combination of the surge suppressor ring and the antiremanent strip can be applied to any other type of continuous electromagnet, and, in particular, for the production of the overvoltage limitation ring of a movable vane relay such as that which is shown diagrammatically in FIG. 6.
  • the paddle relay consists of an electromagnet comprising a core 60 around which is mounted a coil 61 shown schematically in broken lines.
  • This core 60 comprises on one side a circular flat head 62 and is fixed at a right angle, on the other side, on one of the wings 63 of an L-shaped frame.
  • the overvoltage damping device consists of a ring in the shape of a crown 68 surrounding the core 60 and held under the head 62 by means of two wings 69, 70 folded over the magnetic surface 67 which serve anti-remanent air gaps.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Fluid-Damping Devices (AREA)
EP85401063A 1984-06-25 1985-05-30 Dispositif amortisseur de surtensions pour électroaimant et électroaimant équipé d'un tel dispositif Expired EP0169748B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8409964 1984-06-25
FR8409964A FR2566571B1 (fr) 1984-06-25 1984-06-25 Dispositif amortiseur de surtensions pour electroaimant et electroaimant equipe d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP0169748A1 EP0169748A1 (fr) 1986-01-29
EP0169748B1 true EP0169748B1 (fr) 1987-11-19

Family

ID=9305389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401063A Expired EP0169748B1 (fr) 1984-06-25 1985-05-30 Dispositif amortisseur de surtensions pour électroaimant et électroaimant équipé d'un tel dispositif

Country Status (6)

Country Link
US (1) US4700165A (da)
EP (1) EP0169748B1 (da)
JP (1) JPH0785448B2 (da)
DE (1) DE3561033D1 (da)
DK (1) DK159744C (da)
FR (1) FR2566571B1 (da)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010310A (en) * 1988-06-16 1991-04-23 General Signal Corporation Alternating current immunized relay and method of immunizing a relay to alternating current
SE504591C2 (sv) * 1995-11-24 1997-03-10 Ericsson Telefon Ab L M Induktiv komponent
US6942469B2 (en) 1997-06-26 2005-09-13 Crystal Investments, Inc. Solenoid cassette pump with servo controlled volume detection
US6208497B1 (en) 1997-06-26 2001-03-27 Venture Scientifics, Llc System and method for servo control of nonlinear electromagnetic actuators
US6982323B1 (en) * 1997-12-23 2006-01-03 Alexion Pharmaceuticals, Inc. Chimeric proteins for diagnosis and treatment of diabetes
JP3492228B2 (ja) * 1999-02-09 2004-02-03 株式会社テクノ高槻 鉄心および該鉄心を用いる電磁駆動機構
DE10206391B4 (de) * 2002-02-15 2004-02-12 Siemens Ag Herstellverfahren der Oberflächengeometrie von Elektromagneten
DE10215018A1 (de) * 2002-04-05 2003-10-23 Moeller Gmbh Gleichstrom-Elektromagnet
DE10359640B3 (de) * 2003-12-18 2004-10-14 Moeller Gmbh Elektromagnetanordnung
US8678140B2 (en) * 2005-10-11 2014-03-25 Otis Elevator Company Electromagnet and elevator door coupler
FR2920247B1 (fr) * 2007-08-20 2009-11-06 Schneider Electric Ind Sas Actionneur electromagnetique et appareil interrupteur dote d'un tel actionneur
US8212638B2 (en) 2008-12-10 2012-07-03 General Electric Company Electromagnet for an electrical contactor
FR2972844B1 (fr) * 2011-03-15 2014-06-06 Schneider Electric Ind Sas Actionneur rotatif et contacteur comportant un tel actionneur
KR200488063Y1 (ko) * 2014-06-30 2018-12-10 엘에스산전 주식회사 릴레이

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE536909C (de) * 1931-10-28 Bbc Brown Boveri & Cie Schaltmagnet fuer Gleich- und Wechselstrom
US1789417A (en) * 1926-10-26 1931-01-20 Oscar F Shepard Polyphase magnet
GB532905A (en) * 1939-09-23 1941-02-03 Igranic Electric Co Ltd Improvements in or relating to electromagnets
US2944195A (en) * 1958-04-28 1960-07-05 Honeywell Regulator Co Electromagnetic actuator
US3185902A (en) * 1963-07-25 1965-05-25 Whirlpool Co Anti-chatter solenoid
DE1295084B (de) * 1963-08-30 1969-05-14 Binder Magnete Kurzschlusswindungsanordnung fuer Wechselstrommagnete
DE1540472A1 (de) * 1965-07-14 1969-12-11 Siemens Ag Elektromagnetisches Schaltgeraet,insbesondere Schuetz
DE1909856A1 (de) * 1969-02-27 1970-09-10 Merk Gmbh Telefonbau Fried Elektromagnet mit Tauchanker
CH512819A (de) * 1969-07-15 1971-09-15 Sprecher & Schuh Ag Wechselstromschütz
US4262877A (en) * 1975-05-09 1981-04-21 Lang Gregor L Solenoid fluid valves
DE2703788C3 (de) * 1977-01-29 1979-10-04 Elektro-Mechanik Gmbh, 5963 Wenden Drehmomentmotor
FR2399721A1 (fr) * 1977-08-05 1979-03-02 Europ Commutation Dispositif electromagnetique a armature mobile

Also Published As

Publication number Publication date
DK159744B (da) 1990-11-26
DE3561033D1 (en) 1987-12-23
JPH0785448B2 (ja) 1995-09-13
DK284685D0 (da) 1985-06-24
FR2566571B1 (fr) 1986-09-26
JPS6181609A (ja) 1986-04-25
DK159744C (da) 1991-04-29
FR2566571A1 (fr) 1985-12-27
US4700165A (en) 1987-10-13
DK284685A (da) 1985-12-26
EP0169748A1 (fr) 1986-01-29

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