EP2179430A1 - Actionneur electromagnetique - Google Patents

Actionneur electromagnetique

Info

Publication number
EP2179430A1
EP2179430A1 EP08786982A EP08786982A EP2179430A1 EP 2179430 A1 EP2179430 A1 EP 2179430A1 EP 08786982 A EP08786982 A EP 08786982A EP 08786982 A EP08786982 A EP 08786982A EP 2179430 A1 EP2179430 A1 EP 2179430A1
Authority
EP
European Patent Office
Prior art keywords
armature
electromagnetic actuator
magnetic
actuator according
recess
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.)
Granted
Application number
EP08786982A
Other languages
German (de)
English (en)
Other versions
EP2179430B1 (fr
Inventor
Wilfried Haas
Werner Hartmann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2179430A1 publication Critical patent/EP2179430A1/fr
Application granted granted Critical
Publication of EP2179430B1 publication Critical patent/EP2179430B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
    • 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
    • H01F7/1638—Armatures not entering the winding
    • 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
    • H01F2007/083—External yoke surrounding the coil bobbin, e.g. made of bent magnetic sheet
    • 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
    • H01F2007/086—Structural details of the armature

Definitions

  • the invention relates to an electromagnetic actuator, in particular an electromagnetic actuator for the actuation of a switching element.
  • the electromagnetic actuator comprises a magnet system 2 with a magnet yoke 4 fixed in a housing and an armature 6 movably mounted in the housing. In an initial position the armature 6 by a force acting on it magnetic force F M (holding force) held on Magnetj och 4.
  • the armature 6 is arranged on a carrier 8 made of an electrically insulating material and mounted with a guide rod 10 axially displaceable in a guide 12 fixed in the housing.
  • a spring 16 in the example of the figure, a cup spring package is supported.
  • the spring 16 is biased and exerts on the armature 6 acting against the magnetic force F M spring force F F , which is smaller than the force exerted by the magnetic yoke 4 on the armature 6 magnetic holding force or magnetic force F M.
  • the flange 14 is mechanically coupled to the movable contact 18 of an electrical switching element 20, the power supply via the flange 14 and a fixed flange 21 takes place.
  • the magnet yoke 4 of such an actuator arrangement may be a pure DC magnet or a combination of a DC magnet and a permanent magnet.
  • the magnetic force F M by one in a coil of the DC magnet flowing current I generated.
  • the magnetic force F M is provided exclusively by the permanent magnet.
  • the direct current I is switched off or, by switching on a direct current I or a pulsed current, the magnetic field generated by the permanent magnet is compensated by an electromagnetically generated opposing field.
  • the armature 6 is set in motion and actuates the switching element 20 via the flange 14.
  • magnetic force F M and spring force F F must be matched to one another in such a way that the armature 6 remains securely in the starting position even under mechanical loading of the switching device and does not trigger upon vibration.
  • the spring force F F must be large enough to accelerate the armature so that in a short time covers a distance sufficient to operate the switching element 20 safely.
  • paths in the range of a few tenths of a millimeter to about 2 mm are often covered in very short times ( ⁇ 1 ms).
  • high holding forces on the one hand and short switching times on the other hand are mutually contradictory demands. High holding forces require namely a correspondingly high anchor volume and thus a high anchor mass. These in turn lead to a greater inertia of the armature when it is accelerated by the spring.
  • an electromagnet for use as an actuator comprising a cup-shaped magnet housing with a magnet housing centrally arranged iron core, a coil for generating a magnetic flux in the magnet housing and a relative to the longitudinal axis of the magnet housing tiltable anchor plate.
  • Essential to the function of this solenoid as an actuator is to be the tiltable armature plate, which has the same outer diameter as the pot edge of the magnet housing.
  • the present invention seeks to provide an electromagnetic actuator for actuating an electromagnetic switching element, with which it is possible to realize short switching times at the same time high holding forces.
  • the electromagnetic actuator includes a magnetic yoke including an inner magnetic core portion surrounded by an electric coil and an outer magnetic core portion between which there is a gap surrounding the inner magnetic core portion in which a coil surrounding the inner magnetic core portion is disposed , And an anchor, which is provided in the region of the gap with at least one recess.
  • the magnetic field traversed by the magnetic iron cross section of the armature from the center of the armature to its edge is minimal and there are no saturation properties.
  • the mass of the armature relative to a solid armature in the form of a disc or plate can be reduced with opposite plane-parallel flat sides, so that the armature is accelerated faster with otherwise identical construction of the switching device and in this way shorter switching times compared to the prior art are possible.
  • the invention is based on the consideration that it is possible to reduce the anchor volume in the region of the magnetic-field-free gap, without this leading to a reduction in the magnetic force or holding force exerted between magnet yoke and armature.
  • the at least one recess may be present in the armature in the form of a recess or a through hole or window, which achieved by the introduction of through holes a particularly effective reduction in mass of the armature who can.
  • armature used for the actuator according to the invention, wherein the armature in particular comprises an inner and a surrounding outer anchor region, which are connected to each other via a plurality of webs.
  • the armature is also provided on its rear side remote from the Magnetj och with at least one recess, a further reduction of the armature mass can be achieved.
  • a particularly space-saving and manufacturing technology easy to manufacture embodiment is achieved when the magnetic yoke is designed as a pot core.
  • the electromagnetic actuator according to the invention may be a pure electromagnet or an electromagnet combined with a permanent magnet, in which the magnetic yoke comprises a permanent magnet whose magnetic axis coincides with the magnetic axis of the inner magnetic core region.
  • FIG. 2 shows an alternative embodiment of the magnet system of an electromagnetic actuator according to the invention with a permanent magnet
  • 3 shows a further alternative embodiment of the electromagnetic actuator with a spring integrated in the magnet system
  • FIGS. 1 to 3 shows the armature illustrated in FIGS. 1 to 3 in a cross section perpendicular to the axis of movement
  • FIG. 5 is a plan view of an alternative embodiment of an anchor according to the invention.
  • Fig. 6 shows a further alternative embodiment of an armature according to the invention in an axial section
  • Fig. 7 shows the basic structure of a operated by an electromagnetic actuator switching device according to the prior art.
  • the electromagnetic actuator according to the invention comprises a magnetic yoke 40, which in the example is rotationally symmetrical about a first magnetic axis 42 as a pot core.
  • the magnetic yoke 40 comprises an inner cylindrical magnetic core region 46 surrounded by an electrical coil 44, which is surrounded by an outer hollow cylindrical magnetic core region 48 and separated therefrom by an annular circumferential gap 50 into which the coil 44 is inserted.
  • the pole faces 52 and 54 of the inner and outer magnetic core areas 46, 48 are arranged in a common plane 56.
  • the magnet yoke 40 is associated with a movably mounted, flat, approximately disk-shaped armature 60, which is provided in the region of the gap 50 with a plurality of recesses 62, which are designed in the example of this figure as a passage opening or window.
  • the armature 60 is a modification according to the invention of a dashed line shown in the figure circular disk-shaped solid anchor with plane-parallel flat sides. Opposite this circular disk shape of the armature 6 is not only provided with the recess 62 in the region of the gap 50 but also with a peripheral edge 60 of the armature 60 and in the side facing away from Magnetj och 40 back of the armature 60 recess 64 provided. Another rotationally symmetrical recess 66 on the back of the armature 60 is located in the middle. The recesses 64, 66 take into account the course of the magnetic flux in the armature and are accordingly introduced where the flux density is low.
  • the mass of the armature 60 is significantly reduced, without this leading to a holding force affecting change in the flux density between the armature 60 and Magnetj och 40 or saturation phenomena occur.
  • the magnetic holding force exerted by the magnet yoke 40 on the armature 60 is at least approximately the same as the holding force exerted by the same magnetic yoke 40 on a disk-shaped armature with plane-parallel flat sides according to the prior art.
  • a multipart magnet yoke 40 is provided as an alternative to the one-part yoke shown in FIG. 1, in which the inner magnet core region 46 is assigned a permanent magnet 462 on its rear side facing away from pole face 52 whose magnetic axis coincides with the magnetic axis 42 of FIG inner magnetic core region 46 coincides.
  • the holding force is generated exclusively by the action of the permanent magnet 462.
  • the discharge of the armature 6 is effected in that when switching on of the coil 44 and the coil core 464 electromagnet formed an opposing field is generated, which at least approximately reverses the effect of the permanent magnet 462.
  • the spring 16 which generates the linear acceleration of the armature 60 when the electromagnet is switched off as shown in FIG. 1 or in the compensated magnetic field of the permanent magnet according to FIG. 2, is integrated into the magnet yoke 40.
  • the armature 60 is provided with four recesses 62, which are designed as passage openings.
  • the magnetic flux is thereby guided by an inner region 68 of the armature 60 to an annular äuße Ren area 70 via webs 72.
  • the recesses 62 are introduced in the form of through bores.
  • window-shaped recesses 62 it is also possible, according to FIG. 6, to provide such recesses 62, which are present only in the form of recesses and form material recesses.
  • a rotationally symmetrical armature 60 is shown, in which the recess 62 is formed by an annular circumferential groove.

Landscapes

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

Abstract

Cet actionneur électromagnétique destiné à actionner un élément de commutation électrique (20) contient une culasse magnétique (40) qui comprend une zone intérieure de noyau magnétique (46) et une zone extérieure de noyau magnétique (48), entre lesquelles se trouve un entrefer (50) qui entoure la zone intérieure de noyau magnétique (46) et dans lequel est disposée une bobine (44) entourant la zone intérieure de noyau magnétique. Un induit (60), qui est pourvu d'au moins un évidement (62) dans la région de l'entrefer (50), est associé à la culasse magnétique (40).
EP08786982.2A 2007-08-13 2008-08-07 Actionneur electromagnetique Not-in-force EP2179430B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710038165 DE102007038165B4 (de) 2007-08-13 2007-08-13 Elektromagnetischer Aktor
PCT/EP2008/060383 WO2009021899A1 (fr) 2007-08-13 2008-08-07 Actionneur électromagnétique

Publications (2)

Publication Number Publication Date
EP2179430A1 true EP2179430A1 (fr) 2010-04-28
EP2179430B1 EP2179430B1 (fr) 2017-02-01

Family

ID=39930672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08786982.2A Not-in-force EP2179430B1 (fr) 2007-08-13 2008-08-07 Actionneur electromagnetique

Country Status (3)

Country Link
EP (1) EP2179430B1 (fr)
DE (1) DE102007038165B4 (fr)
WO (1) WO2009021899A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010014072A1 (de) * 2010-04-07 2011-10-13 Hydac Fluidtechnik Gmbh Betätigungsvorrichtung
DE102011082114B3 (de) * 2011-09-05 2013-01-31 Siemens Aktiengesellschaft Elektromagnetischer Antrieb
DE102011115614B4 (de) * 2011-09-27 2014-03-06 Thomas Magnete Gmbh Proportionalmagnet
EP3439013A1 (fr) 2017-08-04 2019-02-06 ABB Schweiz AG Armature pour actionneur électromagnétique, actionneur électromagnétique, dispositif de commutation et procédé de fabrication d'une armature

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3912042A1 (de) * 1988-04-12 1990-01-11 Scholz Joachim Elektromagnet
DE19852287C2 (de) * 1998-11-13 2000-11-09 Daimler Chrysler Ag Elektromagnetischer Aktuator und Verwendung des Aktuators
DE19922424C2 (de) * 1999-05-14 2003-04-30 Siemens Ag Elektromagnetischer Stellantrieb
DE102005026415A1 (de) * 2005-06-03 2006-12-07 Siemens Ag Elektromagnetische Antriebseinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009021899A1 *

Also Published As

Publication number Publication date
WO2009021899A1 (fr) 2009-02-19
DE102007038165A1 (de) 2009-02-26
DE102007038165B4 (de) 2011-06-09
EP2179430B1 (fr) 2017-02-01

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