EP2474009A1 - Dispositif d'actionnement électromagnétique bistable - Google Patents

Dispositif d'actionnement électromagnétique bistable

Info

Publication number
EP2474009A1
EP2474009A1 EP10743039A EP10743039A EP2474009A1 EP 2474009 A1 EP2474009 A1 EP 2474009A1 EP 10743039 A EP10743039 A EP 10743039A EP 10743039 A EP10743039 A EP 10743039A EP 2474009 A1 EP2474009 A1 EP 2474009A1
Authority
EP
European Patent Office
Prior art keywords
unit
permanent magnet
armature
coil unit
magnet means
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
EP10743039A
Other languages
German (de)
English (en)
Other versions
EP2474009B1 (fr
Inventor
Thomas Golz
Thomas Schiepp
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.)
ETO Magnetic GmbH
Original Assignee
ETO Magnetic 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 ETO Magnetic GmbH filed Critical ETO Magnetic GmbH
Publication of EP2474009A1 publication Critical patent/EP2474009A1/fr
Application granted granted Critical
Publication of EP2474009B1 publication Critical patent/EP2474009B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
    • 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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • 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
    • H01F2007/1669—Armatures actuated by current pulse, e.g. bistable actuators

Definitions

  • the present invention relates to a bistable electromagnetic actuator according to the preamble of the main claim. Such a device is well known in the art.
  • Electromagnetic actuators in the form of actuators are used for a variety of control purposes, such as for the adjustment of a camshaft between different engagement positions in motor vehicles.
  • conventional actuators which are typically realized with a retraction anchor, have a single stable position (setting position) in which the anchor is usually held by a spring.
  • the coil unit In order to achieve a second setting position, the coil unit is subjected to a voltage application, with the effect that the spring force of the spring is overcome and the armature is moved into the second setting position.
  • the coil unit In such (monostable) actuators, the coil unit must be permanently energized to hold the anchor permanently in the second position, so that monostable solutions due to energy consumption are not or only limited for applications where the actuator is often in the second Parking position is.
  • bistable actuators are known from the prior art, in which the second setting position can be achieved by a time-limited (typically pulse-shaped) energization of the coil unit and then the armature in this position remains currentless (relative to the coil energization) stably ,
  • a time-limited (typically pulse-shaped) energization of the coil unit and then the armature in this position remains currentless (relative to the coil energization) stably
  • An example of such a known device is shown in DE 201 14 466 U1.
  • Object of the present invention is therefore to provide a bistable electromagnetic actuator which allows energetically favorable and with short switching times, the movement of the armature unit between the two parking positions, wherein both the movement of the armature unit from the first to the second control position, as well as the moving from the second setting position into the first setting position quickly, without external mechanical influence on the armature unit (by an actuating partner) and with minimization of switching times and energy expenditure to be made possible.
  • bistable electromagnetic actuator with the features of the main claim; advantageous developments of the invention are described in the subclaims.
  • the (stationary) coil unit in the axial (movement) direction is assigned on both sides to permanent magnet means at the armature, which act and are poled in such a way that, in response to a (impulse-shaped, in particular temporally limited to the movement process) DC signal, the armature movement takes place in the manner of a switching operation.
  • a first permanent magnet of the permanent magnet means is attracted to the armature of the coil unit (according to a preferred embodiment: a magnetically effective combination of coil unit and stationary core area axially surrounding a central region of the armature), while simultaneously, opposite to the coil unit, the electromagnetic Repulsion of a second permanent magnet at the anchor takes place.
  • the coil unit is to be energized so that the repulsive effect on the permanent magnet adhering to the core region exceeds the permanent magnetic adhesive force;
  • the permanent magnetic attraction by the (axially opposite) further permanent magnet is effective.
  • the armature unit is elongated to realize this basic functionality and has a central shaft portion, which extends in accordance with preferred embodiments of the invention through the coil unit or the stationary core area and at both ends a permanent magnet, each more preferably in disk form, realized and optionally provided with further magnetically conductive elements for flow guidance. It is particularly preferred to form such an arrangement radially symmetrical, so that then within a cylindrical space, the adjusting device can be formed, wherein, based on a reduced diameter central shaft portion, each end ansitzenden permanent magnets are increased in diameter.
  • the armature unit for realizing the engagement means frontally (one or both ends) on a preferably flat surface (anchor end face) on which then sits a plunger unit and is moved with the armature unit; this ram unit is then for cooperation with an actuator (aggregate), e.g. a camshaft for the adjustment formed.
  • an actuator e.g. a camshaft
  • such an engagement-side ram unit not to be firmly connected to the Kerkerü to connect, but to effect a detachable connection.
  • the present invention makes it possible for such a metallic ram unit to be magnetically adhered to an anchor end face by means of the permanent magnetic adhesive force of the permanent magnet means, insofar as a detachable connection is possible. It is also possible according to training and provided to form a plurality of such plunger, which can be guided not only axially or axially parallel to the direction of movement, but also skew or otherwise.
  • the plunger unit is intended to form the plunger unit not exclusively of magnetic or magnetically conductive material; Rather, it is useful for applications in which on the one hand the described releasable adhesive action between armature unit and ram unit to be achieved, on the other hand, however, the unwanted adhesion of metallic abrasion in the control range is to be avoided on the plunger unit, meaning the armature unit opposite engagement region of the plunger unit to realize a non-magnetic material, which further training in terms of its hardness, toughness or the like. for interaction with the intervention partner (eg the camshaft) can be optimized by suitable material treatment.
  • the intervention partner eg the camshaft
  • both sections (magnetically on the one hand for adhering to or on the armature end face, non-magnetic grip for an aggregate on the other hand) realize as a permanently connected unit, where they od particular connection methods such as sintering, friction welding .dgl. to offer.
  • it is also to support the movement of the armature unit (in one or both directions of the movement longitudinal axis) by a spring action.
  • a spring eg compression spring
  • inwards ie in the movement space between the core region and the permanent magnet
  • outwardly approximately surrounding a ram unit
  • a further preferred embodiment of the invention provides for the bistable actuating device before a housing, which takes over, consisting of magnetically conductive material, tasks of the flux conduction of the magnetic flux and insofar extends parallel to the longitudinal axis of movement preferably between the setting positions of the both sides provided on the armature unit permanent magnets.
  • the housing by means of at least one bow-shaped housing element, advantageously not the housing circumferentially around the permanent magnet means extends, but here only legs of a further preferred U (alternatively L) -shaped element are provided. If a pair of such brackets, axially aligned along respective openings for guiding the armature (more precisely: the shaft portion between the permanent magnets), then interleaved against each other, creates an easy to install, mechanically stable and magnetically effective housing construction.
  • the erfindunssiee bistable electromagnetic actuator as a tristable electromagnetic Stellvor- direction, which is to fall within the scope of the invention, the term "unstable” as a special education under the general term “bistable”.
  • the invention is encompassed by the invention according to a preferred development, not (only) two stable states by means of the inventive device. but to enable a third stable state in addition. According to training in the context of the invention, this is done by a third (preferably stable) center position along the longitudinal axis of movement of the armature unit can be stably occupied by the device, more preferably characterized in that also here (ie without energizing the coil unit) the armature in this position remains.
  • this tristillability-inducing position is achieved by the permantent magnet means of the armature unit, which are advantageously provided at both ends, cooperating with a (central) stationary core area in such a way that none of the permanent magnet units adhere to the core unit due to opposing attractive forces one (preferably the same) distance from the core unit, with the result that the armature unit occupies the stable third setting position in the middle between the end-side parking positions.
  • the armature unit can be moved into this third setting position by (once) pulse-shaped energization, whereby a further (one-time) pulse, in one or the other direction, is triggered by energizing pulses of corresponding polarity.
  • a further (one-time) pulse in one or the other direction, is triggered by energizing pulses of corresponding polarity.
  • it has proven to be favorable to keep the stable end position either de-energized or by means of an AC signal for the coil unit (or even to reach in the first place).
  • the putreliunsze advantageous tristability then allows completely new applications and control tasks, especially those in which then selectively an anchor unit along a longitudinal movement axis can be spent in one of three separate, each stable positions, wherein advantageously and further education, at least two of these, more preferably all three, each without current are stable.
  • advantageously and further education at least two of these, more preferably all three, each without current are stable.
  • FIG. 1 shows a schematic side view of the bistable electromagnetic actuating devices according to a first embodiment of the invention, wherein the armature is in a first parking position on the left;
  • FIG. 2 a representation analogous to FIG. 1 with the armature extended into the second setting position (right); FIG.
  • FIG. 3 shows a schematic longitudinal section through the devices of Figures 1, 2 in the de-energized state of the coil unit and in the first parking position on the left.
  • FIG. 4 a representation analogous to FIG. 3 at the beginning of the energization of the coil unit and before a movement into the second setting position;
  • Fig. 5 is a perspective view of a bow-shaped housing unit with a pair of legs;
  • FIG. 6 shows an arrangement of two nested housing bars (FIG. 5) with an anchor unit guided therein and a mounted coil unit; various views of the anchor end face (s) of the device of Figure 6 to illustrate the interaction with one or more plunger units.
  • FIG. 11 shows a variant of a spring insert between core region and permanent magnet armature disk;
  • Fig. 12 a longitudinal section through a bistable electromagnetic
  • Fig. 13 a view analogous to FIG. 12, but with an additional energization of the coil unit, through which then the (center) equilibrium of FIG. 12 dissolved and the anchor unit can be brought into an end position.
  • FIGS. 1 to 4 illustrate the essential functional components for realizing the bistable electromagnetic actuator according to a first preferred embodiment, including sketched field progressions:
  • An anchor unit consisting of an armature shaft 10, both sides ansitzenden permanent magnet discs 12 and 14, the permanent magnet discs each axially outwardly final armature discs 16th , 18 and the permanent Magnetic discs 12, 14 axially inward limiting inner discs 20, 22 is guided axially displaceably in a stationary core assembly 24.
  • the core unit 24 cooperates with a coil unit 26 which (see in particular the sectional views of FIGS. 3, 4) is arranged surrounding the shaft region 10. Radially shell side, the arrangement is enclosed by a stationary housing shell 30th
  • FIG. 2 illustrates the reverse, axially displaced state of the armature (second setting position).
  • Figures 3 and 4 illustrate in this context the effect of the permanent magnet or a Bestromungsimpulses the coil:
  • Figure 3 corresponding to the position of Figure 1, illustrates the permanent magnetic field of the disc-shaped permanent magnets 12, 14 (axially magnetized in the manner shown), wherein the magnetic circuit is closed via the disks 16, 20 or 18, 22 and the enclosing housing or shaft 10.
  • FIGs 5, 6 illustrate how the housing 30 can be made in an elegant manner of bow-shaped elements space and effort saving; More specifically, a U-shaped stirrup member 34 shown in Figure 5 is formed of a pair of legs 36 (these extend, as shown in Figure 6, parallel to the axial direction of travel) and a central portion 38 which is both legs 36 connects. The central portion 38 has a central opening 39 through which the shaft portion 10 of the armature can move.
  • FIG. 6 illustrates how, in an interleaved fashion, a pair of housing elements 34 form the housing for the actuator and enclose the core or coil area 24, 26, while seated on the shaft 10 at the end, the respective disc-shaped permanent magnets with associated inner or inner Anchor disks, between the respective pairs of legs 36, can be guided outwards.
  • an outer face of the armature disks 17 or 18 offers different possibilities for driving ram elements (ram units) 40 seated thereon.
  • at least one plunger element 40 (alternatively also two or more, see the figures 8, 9, wherein the figure 9 also carries in the opposite direction a plunger element) by means of magnetic adhesive force, characterized in that the plunger element 40 of magnetic Mate - Rial of the permanent magnet 12 and 14 is held on the respective flat end face (this can be parallel to the axis, centric, alternatively also skewed, depending on the configuration).
  • the tappet unit shown in elongated cylindrically is formed from a plurality of axially adjoining sections;
  • a section which engages on the outer surface of the armature disk is preferably magnetic in order to achieve the advantageous releasable adhesive effect.
  • Figures 10 and 11 illustrate ways in which, based on the configuration of Figures 1 and 2, one or two compression springs 50, 52 (from the outside) and 54 (between the core and inner disc 20, 22) force-enhancing, damping or on other, otherwise known manner can be used.
  • FIGS 12 and 13 illustrate a second embodiment of the present invention, wherein like reference numerals with the first embodiment in this regard denote identical or equivalent functional components.
  • FIG. 12 illustrates the slightly different structural design of the armature unit, in which case the central shaft region 10 has additionally been supplemented by permanent-magnetically flux-conducting sections 60 which likewise allow a flux-guiding action via the surrounding housing 30 as disks 62.
  • the closed thin arrowheads 66 illustrate a permanent magnetic flux, symmetrically in the manner shown in FIG. 12, which holds the anchor unit in a central position between both end positions, as in connection with FIG described first embodiment, allows. More specifically, two permanent magnetic force arrows shown in FIG.
  • This intermediate state can be achieved by pulsing the coil unit for a short time in order to bring the armature unit into this state, in which case the energizing is terminated before a stop takes place at the opposite end.
  • the now possible energization as produced by a pulse and according to the arrow 70, produces a repulsive effect in the left-hand area in the figure (insofar as the left-hand arrow is enlarged in relation to the right), with the effect that that, in response to the current pulse, the armature moves to the right end position from the stable center position.
  • the present invention is particularly suitable for forming a camshaft adjustment, so that the use for the purpose of the camshaft adjustment of an internal combustion engine is claimed as belonging to the present invention.
  • the present invention is not limited thereto. Rather, the present invention is suitable for any setting purpose, which allows or uses a bistable electromagnetic locations.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un dispositif d'actionnement électromagnétique bistable qui comprend un ensemble induit (10, 12, 14, 16, 18, 20, 22), qui peut être déplacé par rapport à un ensemble bobine fixe (26) et, en réponse à l'excitation dudit ensemble bobine, le long d'un axe de déplacement longitudinal entre au moins deux positions d'actionnement, et qui possède des moyens de mise en contact (40) sur une ou ses deux extrémités pour coopérer avec une unité à actionner montée en aval. Selon l'invention, l'ensemble induit possède des moyens à aimants permanents (12, 14) dans la direction de l'axe de déplacement longitudinal sur les deux côtés de l'ensemble bobine, lesdits moyens à aimants permanents étant conçus pour coopérer avec une zone de noyau fixe (24) associée à l'ensemble bobine de façon qu'en réponse à l'excitation de l'ensemble bobine par un signal de tension CC d'une première polarité, l'ensemble induit est amené dans une première position d'actionnement, qui se situe de préférence au niveau de l'extrémité, qui est stable et à l'état non excité, et, en réponse à l'excitation de l'ensemble bobine par un signal de tension CC d'une deuxième polarité, l'ensemble induit est amené dans une deuxième position d'actionnement, qui est axialement opposée à la première position d'actionnement, et qui est de préférence au niveau de l'extrémité, qui est stable et à l'état non excité.
EP10743039.9A 2009-09-01 2010-08-11 Dispositif d'actionnement électromagnétique bistable Not-in-force EP2474009B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009039562.8A DE102009039562B4 (de) 2009-09-01 2009-09-01 Bistabile elektromagnetische Stellvorrichtung
PCT/EP2010/004890 WO2011026553A1 (fr) 2009-09-01 2010-08-11 Dispositif d'actionnement électromagnétique bistable

Publications (2)

Publication Number Publication Date
EP2474009A1 true EP2474009A1 (fr) 2012-07-11
EP2474009B1 EP2474009B1 (fr) 2018-01-24

Family

ID=43426378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10743039.9A Not-in-force EP2474009B1 (fr) 2009-09-01 2010-08-11 Dispositif d'actionnement électromagnétique bistable

Country Status (3)

Country Link
EP (1) EP2474009B1 (fr)
DE (1) DE102009039562B4 (fr)
WO (1) WO2011026553A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102011103169B4 (de) * 2011-06-01 2017-03-02 Gerhard Kirstein Elektromagnetischer Antrieb, Antriebsanlage und deren Verwendung
EP3016117B1 (fr) 2014-10-31 2017-12-06 Husco Automotive Holdings LLC Appareil d'actionneur de broche-poussoir
DE102016106805A1 (de) 2016-04-13 2017-10-19 Eto Magnetic Gmbh Stromlos monostabile elektromagnetische Stellvorrichtung und Verwendung einer solchen
FR3087935B1 (fr) * 2018-10-26 2021-05-14 Moving Magnet Tech Actionneur bistable unipolaire de type balistique
DE102019215285A1 (de) 2019-10-04 2021-04-08 Robert Bosch Gmbh Brennstoffzellenschließsystem
DE102019133333A1 (de) 2019-12-06 2021-06-10 Eto Magnetic Gmbh Elektromagnetische Stellvorrichtung mit Zwischenposition

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GB1308145A (en) * 1969-08-01 1973-02-21 Wilmot Breeden Ltd Vehicle door latch mechanisms
JPS57132305A (en) * 1981-02-07 1982-08-16 Alps Electric Co Ltd Self-holding type solenoid
DE3341625A1 (de) * 1982-11-25 1984-05-30 Aisin Seiki Solenoideinheit
JPS6010707A (ja) * 1983-06-30 1985-01-19 Matsushita Electric Works Ltd ３安定型電磁石装置
JPH0274011A (ja) * 1988-09-09 1990-03-14 Omron Tateisi Electron Co 有極電磁石装置
DE20114466U1 (de) 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE10202628A1 (de) * 2002-01-21 2003-08-07 Prettl Rolf Multistabile Stellvorrichtung
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DE202006011905U1 (de) * 2006-08-03 2007-12-06 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE102007028600B4 (de) * 2007-06-19 2011-06-22 ETO MAGNETIC GmbH, 78333 Elektromagnetische Stellvorrichtung

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Also Published As

Publication number Publication date
EP2474009B1 (fr) 2018-01-24
DE102009039562B4 (de) 2020-03-19
WO2011026553A1 (fr) 2011-03-10
DE102009039562A1 (de) 2011-03-03

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