EP1351262B1 - Electroaimant à courant continu - Google Patents

Electroaimant à courant continu Download PDF

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Publication number
EP1351262B1
EP1351262B1 EP03003903A EP03003903A EP1351262B1 EP 1351262 B1 EP1351262 B1 EP 1351262B1 EP 03003903 A EP03003903 A EP 03003903A EP 03003903 A EP03003903 A EP 03003903A EP 1351262 B1 EP1351262 B1 EP 1351262B1
Authority
EP
European Patent Office
Prior art keywords
armature
air gap
central web
yoke
arrangement according
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
EP03003903A
Other languages
German (de)
English (en)
Other versions
EP1351262A3 (fr
EP1351262A2 (fr
Inventor
Volker Lang
Rudolf Scholz
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
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 Moeller GmbH filed Critical Moeller GmbH
Publication of EP1351262A2 publication Critical patent/EP1351262A2/fr
Publication of EP1351262A3 publication Critical patent/EP1351262A3/fr
Application granted granted Critical
Publication of EP1351262B1 publication Critical patent/EP1351262B1/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
    • 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
    • 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
    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding

Definitions

  • the invention relates to a DC electromagnet made of laminated magnet parts for use in an electrical switching device, in particular in a contactor with a drive coil.
  • DC electromagnets which are used in particular for contactors, come in various forms. If such electromagnets comprise two pairs of pole faces, for example a U-shaped magnetic yoke with a rod-shaped magnet yoke closing armature or E-shaped magnet parts, the relative adjustment of the position of the pole face pairs is necessary. Furthermore, there are at least two working air gaps in such electromagnets, whereby the size of the power loss is co-determined.
  • each with E-shaped fixed and movable magnetic cores are known ( DE 28 44 361 A1 and US 4,700,165 B).
  • the ends of the lateral legs of the magnetic cores are also chamfered and guide means are also used which stabilize the relative movement of the magnetic cores to one another.
  • the invention has for its object to provide a DC electromagnet with comparatively similar power loss and functionality, with reduced cost in the production, or with the smallest possible number of magnetic parts and in which the number of Pol vompare is reduced.
  • the invention consists in that the fixed magnetic yoke is ring-shaped or C-shaped and comprises a central web and two, from the central web angled protruding Magnetjochschenkel. Furthermore, a single working air gap is formed between the free end of the movable prismatic armature and the center of the central web perpendicular to the longitudinal axis of the armature; the two free leg ends of the magnetic yoke are brought close to the armature, where a narrow passage gap for the armature is formed.
  • the armature is guided by guide means during its displacement stroke.
  • the free end of the armature is directed to the central web of the magnetic yoke and the surfaces of the working air gap are formed obliquely against the axis of the armature.
  • the formed between the free ends of the yoke legs and the armature narrow passage gap represents only a parasitic air gap whose magnetic resistance does not change in Verschiebungshubchien.
  • the surfaces are wedge-shaped.
  • the wedge shape of the working air gap is formed at the free end of the armature such that the wedge tip lies in the plane of symmetry of the central web and the wedge is directed to the central web.
  • Corresponding to the wedge shape of the working air gap is formed on the central web as a wedge-shaped recess.
  • the working air gap is out with at least one stop provided with nonmagnetic material, wherein the material forms the remanence air gap with closed magnetic circuit.
  • yoke profile is understood to mean the interior space which is formed by the inner surfaces of the lateral limbs and of the middle web.
  • the yoke profile facing surface of the central web may preferably be formed without elevations or jumps into the yoke in profile.
  • an extension web is formed on the central web of the magnetic yoke, which carries the wedge-shaped depression as correspondence to the trained at the end of the armature working air gap.
  • the advantage of the magnet arrangement described is that higher contact pressure forces can be achieved compared to arrangements with a comparable drive volume and comparable power loss. Furthermore, it is advantageous that the structure of stamped hurtier sheets is created, which may be welded or riveted. The installation of the drive can be made simple because only a few coupling elements must be used by the symmetrical structure of the magnet assembly. Overall, therefore, the profitability of production can be improved.
  • the design of the working air gap is adjusted to this requirement (first embodiment) so that the magnet armature facing the entire inner surface of the transverse leg forms a single plane that has no physical formations (survey) into the yoke profile, whereby the insertion of the drive coil would be hindered ,
  • embodiments are proposed which differ in the length of the armature used or in the position of the working air gap with respect to the central web of the magnetic yoke.
  • the magnet parts (yoke 10 and armature 60) of the magnet arrangement consist of stamped sheet packages and have a rectangular cross section.
  • the packages are riveted without cover plates (rivets 80), resulting in the mechanical cohesion.
  • the fixed, ring or C-shaped magnetic yoke 10 is arranged, which comprises two side legs 11 which project perpendicularly from the central web 12 and are thus aligned parallel to each other.
  • the ends 14 of the side legs 11 are angled inwardly towards the armature 60 out.
  • the leg ends are brought close to the armature where they form a narrow passage gap 23 for the armature.
  • the width of the air gaps is a few tenths of a millimeter. Compliance with the air gap width during the anchor movement should be ensured by precise guide elements or - preferably - by a platelet assignment of non-magnetic material.
  • the material support (made of foil or plate) takes place on the air gap surfaces in the passage gap on the magnetic parts 14,14 ', 60th With friction-reducing material support, the friction in the passage gap 23 can be minimized.
  • guide means of the armature is passed during the displacement stroke.
  • the armature 60 is designed prismatic or rod-shaped. Its free end 64 is directed to the center of the central web 12 of the magnetic yoke.
  • the head side 66 of the magnet armature 60 carries a groove 80 for insertion of coupling elements, not shown, for the drive mechanism.
  • a restoring force can be generated by at least one spring.
  • the armature 60 is comprised of a drive coil, not shown, with bobbin and field winding.
  • the magnet assembly is completed by the drive coil, which occupies the space (yoke or inner profile 300) between the central web 12, side legs 11 and leg ends 14 almost completely, and in the interior of the armature 60 is moved in the direction of the central web 12 of the magnetic yoke.
  • the armature has a corresponding stroke in the working air gap 22.
  • the shape of the working air gap 22 is designed wedge-shaped or triangular.
  • the magnet arrangement is formed symmetrically to a vertical plane of symmetry of the C-shaped magnetic yoke.
  • the yoke profile 300 spanned by the magnetic yoke 10 is square or rectangular.
  • the cross section formed by the yoke profile allows according to the embodiment Fig. 1 the unimpeded insertion of the drive coil, not shown, including bobbin perpendicular to the plane of symmetry of the magnetic yoke.
  • the working air gap is formed such that the magnet armature facing the entire inner surface 17 of the transverse leg 12 forms such a surface beyond which no elevation projects into the yoke 300.
  • the two embodiments according to Fig. 1 and Fig. 2 differ in the length of the armature and the position of the working air gap 22 and also in the size of the winding space for the drive coil.
  • the embodiment according to Fig. 2 has the yoke profile a larger space, since the central web 12 with a smallest possible cross section is executable.
  • an extension web 13 is formed on the central web 12 of the magnetic yoke.
  • a wedge-shaped working air gap is formed, according to the corresponding embodiment Fig. 1 ,
  • the leg ends 14 are formed integrally with the magnetic yoke 10.
  • the entire magnetic yoke 10 consists of uniform punching plates, which are held together with rivets 80.
  • the flux guides 14 'with notches 114 may be inserted in grooves on the head side of the side legs 11.
  • the multi-part design is necessary because it allows the assembly of the drive coil in the yoke in time before the assembly of the magnetic yoke.
  • stop plates of non-magnetic material for example, plastic or metal foil.
  • Two stop plates can be arranged symmetrically on the armature or on the magnetic yoke or both. With the stop plates, a defined air gap thickness is formed, which excludes a sticking together and whereby the anti-maneuvering function of the air gap is met.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Impact Printers (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Soft Magnetic Materials (AREA)

Claims (9)

  1. Dispositif d'électro-aimant à courant continu formé de pièces magnétiques feuilletées pour l'utilisation dans un appareil de commutation électrique, notamment dans un contacteur pourvu d'une bobine d'entraînement,
    comprenant une culasse magnétique (10) fixe formée d'un élément intermédiaire (12) et de deux branches (11),
    les extrémités libres (14, 14') des branches (11) de la culasse magnétique, situées à une distance l'une de l'autre, formant une fente de passage étroite (23) pour une armature prismatique (60) mobile,
    l'armature (60) étant guidée par des dispositifs de guidage (40) lors de sa course de déplacement,
    l'extrémité libre (64) de l'armature (60) étant dirigée vers l'élément intermédiaire (12) de la culasse magnétique (10) et un entrefer de travail (22) perpendiculaire à l'axe longitudinal de l'armature (60) et dont les surfaces (15, 65) sont exécutées d'une manière oblique inclinée par rapport à l'axe de l'armature (60) étant présent entre l'extrémité libre (64) de l'armature (60) et le milieu de l'élément intermédiaire (12),
    caractérisé par le fait que les surfaces (15, 65) de l'entrefer de travail (22) sont exécutées de manière à avoir la forme d'un coin situé dans l'axe de l'armature (60) et que les surfaces d'extrémité libres des pièces magnétiques (14, 14', 60) tournées vers l'armature sont revêtues d'une feuille non magnétique.
  2. Dispositif d'électro-aimant à courant continu selon la revendication 1, caractérisé par le fait que la forme en coin de l'entrefer de travail (22) au niveau de l'armature (60) est exécutée de manière à ce que la pointe du coin s'étende dans le plan de symétrie de l'élément intermédiaire (12).
  3. Dispositif d'électro-aimant à courant continu selon la revendication 2, caractérisé par le fait que la pointe du coin est située en direction de l'élément intermédiaire (12).
  4. Dispositif d'électro-aimant à courant continu selon l'une des revendications 2, 3 ou 4, caractérisé par le fait que la forme en coin de l'entrefer de travail (22) au niveau de la culasse magnétique (10) est exécutée en tant que creux en forme de coin.
  5. Dispositif d'électro-aimant à courant continu selon l'une des revendications précédentes, caractérisé par le fait que la surface intérieure (17) de l'élément intermédiaire (12) tournée vers le profil de culasse (300) est exécutée sans reliefs saillant dans le profil de culasse (300).
  6. Dispositif d'électro-aimant à courant continu selon la revendication 4, caractérisé par le fait que l'entrefer de travail (22) au niveau de la culasse magnétique est exécuté sur une traverse d'extension (13) au milieu de l'élément intermédiaire (12).
  7. Dispositif d'électro-aimant à courant continu selon l'une des revendications précédentes, caractérisé par le fait que l'entrefer de travail est pourvu d'au moins une plaque de butée (77) en matériau non magnétique.
  8. Dispositif d'électro-aimant à courant continu selon l'une des revendications précédentes, caractérisé par le fait que les extrémités de branches (14) sont solidaires de la culasse magnétique (10).
  9. Dispositif d'électro-aimant à courant continu selon l'une des revendications 1 à 7, caractérisé par le fait que les extrémités de branches (14') sont formées par des pièces à conduction magnétique sur la culasse magnétique (10).
EP03003903A 2002-04-05 2003-02-21 Electroaimant à courant continu Expired - Lifetime EP1351262B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10215018A DE10215018A1 (de) 2002-04-05 2002-04-05 Gleichstrom-Elektromagnet
DE10215018 2002-04-05

Publications (3)

Publication Number Publication Date
EP1351262A2 EP1351262A2 (fr) 2003-10-08
EP1351262A3 EP1351262A3 (fr) 2004-12-08
EP1351262B1 true EP1351262B1 (fr) 2008-08-20

Family

ID=27816154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03003903A Expired - Lifetime EP1351262B1 (fr) 2002-04-05 2003-02-21 Electroaimant à courant continu

Country Status (5)

Country Link
US (1) US6731191B2 (fr)
EP (1) EP1351262B1 (fr)
AT (1) ATE405939T1 (fr)
DE (2) DE10215018A1 (fr)
ES (1) ES2312673T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10359640B3 (de) * 2003-12-18 2004-10-14 Moeller Gmbh Elektromagnetanordnung
DE102004002528A1 (de) * 2004-01-12 2005-08-04 Siemens Ag Elektromagnetischer Linearantrieb
JP4285354B2 (ja) * 2004-07-26 2009-06-24 株式会社デンソー リニアソレノイドおよび電磁弁
EP1892739A1 (fr) * 2006-08-25 2008-02-27 Siemens Aktiengesellschaft Unité d'entraînement électromagnétique et appareil de commutation électromécanique
US8451080B2 (en) * 2011-02-16 2013-05-28 Toyota Motor Engineering & Manufacturing North America, Inc. Magnetic field focusing for actuator applications
US8736128B2 (en) 2011-08-10 2014-05-27 Toyota Motor Engineering & Manufacturing North America, Inc. Three dimensional magnetic field manipulation in electromagnetic devices
US8570128B1 (en) 2012-06-08 2013-10-29 Toyota Motor Engineering & Manufacturing North America, Inc. Magnetic field manipulation devices and actuators incorporating the same
US9231309B2 (en) 2012-07-27 2016-01-05 Toyota Motor Engineering & Manufacturing North America, Inc. Metamaterial magnetic field guide
WO2017023235A1 (fr) * 2015-07-31 2017-02-09 Compagnie Generale Des Etablissements Michelin Dispositif et procédé pour l'inspection de matériau polymère à renfort ferreux
CN110911233B (zh) * 2018-09-17 2022-08-30 伊顿电气有限公司 一种直流磁系统及电力设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB532905A (en) * 1939-09-23 1941-02-03 Igranic Electric Co Ltd Improvements in or relating to electromagnets
CH366333A (fr) * 1957-08-16 1962-12-31 Renault Electro-aimant
DE2530536A1 (de) * 1975-07-09 1977-01-13 Licentia Gmbh Elektromagnet
FR2406885A1 (fr) * 1977-10-18 1979-05-18 Telemecanique Electrique Electro-aimant pour contacteur alimente en courant continu
FR2560429B1 (fr) * 1984-02-28 1987-06-19 Telemecanique Electrique Electro-aimant silencieux et contacteur utilisant un tel electro-aimant
FR2566571B1 (fr) * 1984-06-25 1986-09-26 Telemecanique Electrique Dispositif amortiseur de surtensions pour electroaimant et electroaimant equipe d'un tel dispositif

Also Published As

Publication number Publication date
EP1351262A3 (fr) 2004-12-08
DE10215018A1 (de) 2003-10-23
ATE405939T1 (de) 2008-09-15
US6731191B2 (en) 2004-05-04
US20030189474A1 (en) 2003-10-09
EP1351262A2 (fr) 2003-10-08
ES2312673T3 (es) 2009-03-01
DE50310337D1 (de) 2008-10-02

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