EP2593945B1 - Dispositif de positionnement électromagnétique - Google Patents

Dispositif de positionnement électromagnétique Download PDF

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Publication number
EP2593945B1
EP2593945B1 EP11735400.1A EP11735400A EP2593945B1 EP 2593945 B1 EP2593945 B1 EP 2593945B1 EP 11735400 A EP11735400 A EP 11735400A EP 2593945 B1 EP2593945 B1 EP 2593945B1
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EP
European Patent Office
Prior art keywords
unit
magnetic field
coil
flux
magnetic
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.)
Active
Application number
EP11735400.1A
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German (de)
English (en)
Other versions
EP2593945A2 (fr
Inventor
Thomas Schiepp
Stefan SCHÖLLER
Jörg BÜRSSNER
Peter Vincon
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
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ETO Magnetic GmbH
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Publication date
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Publication of EP2593945A2 publication Critical patent/EP2593945A2/fr
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Publication of EP2593945B1 publication Critical patent/EP2593945B1/fr
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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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • 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
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1844—Monitoring or fail-safe circuits
    • 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
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/031—Electromagnets

Definitions

  • the present invention relates to an electromagnetic actuator according to the preamble of the main claim.
  • Such devices are for example from the German utility model 201 14 466 known and are suitable for numerous adjusting devices.
  • a preferred application of such a device is the camshaft adjustment;
  • the sliding or tappet unit connected to the movable armature unit acts on a camshaft of an internal combustion engine and thus effects a desired adjustment functionality.
  • this technology has the disadvantage that a malfunction from a respective terminal signal is difficult to determine and, accordingly, a downstream evaluation electronics consuming and error prone itself.
  • this known induction technology can detect only a movement of the plunger or the anchor unit in principle, but not a respective plunger position; In particular, it is not possible with means for evaluating an induction coil voltage to reliably detect a (stationary) end position of the ram engaging approximately in the camshaft.
  • the not yet public utility model application at the time of the present application 20 2009 006 940 the applicant Alternatively to the measurement of a coil voltage (induced by the permanent magnet unit) for detecting the position of the armature stationary sensor means (as a magnetic field detection means) in a housing or a carrier unit of the adjusting device, which cooperate magnetically detecting with the permanent magnet means and in response to a movement or position the permanent magnet means (corresponding approximately to a movement or position of the armature unit) output an associated magnetic field detection signal for further processing.
  • This signal is initially independent of a Bestromungs- or non-BestromungsSh the coil unit and in particular also independent of a movement or standstill situation of the armature, such as Fig.
  • a stationary coil unit 10 is provided, which is formed around a stationary core 12 around. Relative to these stationary units in the axial direction (ie longitudinal direction in the Fig. 9 ) is movably mounted an anchor unit 14 with ansaftender ram unit 16, which is formed with its engagement-side end 18 in otherwise known manner for cooperation with a groove of a camshaft adjustment.
  • the armature unit 14 has a (disk-shaped) permanent magnet unit 20, which is axially magnetized in the manner shown, and thus faces the core unit 12, that in response to an energization of the coil unit 10, the armature unit 14 together with ansaftender ram unit 16 (this is either fixed or through Holding force of the permanent magnet unit 20 releasably held on this) in the axial direction (ie in the Fig. 9 downwards) is moved.
  • a (disk-shaped) permanent magnet unit 20 which is axially magnetized in the manner shown, and thus faces the core unit 12, that in response to an energization of the coil unit 10, the armature unit 14 together with ansaftender ram unit 16 (this is either fixed or through Holding force of the permanent magnet unit 20 releasably held on this) in the axial direction (ie in the Fig. 9 downwards) is moved.
  • the permanent magnet unit 20 a stationary sensor unit 22 (suitable in the case not shown in the figures) assigned, which detects the permanent magnetic field and, realized as a Hall sensor, this magnetic field and its change Detect movement of the anchor unit 14 and perform a subsequent electronic evaluation.
  • an electromagnetic actuator is known, with an in response to an energization of a stationary, axially aligned coil unit along or parallel to the axial direction driven armature unit, which is designed to cooperate with a extending in the axial direction slide and / or tappet unit, wherein permanent magnet means are provided on and / or in the armature unit and / or the slide or tappet unit and the armature unit and the armature unit are accommodated at least partially in a housing or support unit, wherein the support unit for stationary contact magnetic magnetic interaction with the permanent magnet means Assigned detection means and are designed so that in an energization and a non-BestromungsSh the coil unit by evaluating a magnetic field detection signal of the magnetic field detection means an axial position of the armature unit and / or the slider or pusher unit can be determined electronically and the coil unit magnetic flux guide are assigned so that this one generated by the coil unit derive magnetic coil field of the magnetic field detection means and / or mitigate against these.
  • the device described, or more precisely the coil unit is additionally associated with magnetic flux guides which are designed such that they adequately derive, shield and / or shield the magnetic coil field generated by the coil unit in the energized state from the magnetic field detection means Mitigate the decryption without at the same time significantly impairing or adversely affecting a detection of the permanent magnetic field of the permanent magnet means by the magnetic field detection means.
  • the flux-conducting means in the form of a magnetically conductive material, e.g. Soft iron, realized flux guide elements are formed and are provided adjacent to the coil unit and / or axially parallel to this running, that in these flux-conducting elements, the coil magnetic field is bundled, thus shielding or weakening the (coil) magnetic field takes place on the sensor unit.
  • a magnetically conductive material e.g. Soft iron
  • such a flux guide (either alone, or provided as a group and more preferably approximately with a common, for example, based on the coil unit front side, plate connected) elongate form, more preferably plate or profile-like shape and to arrange this / s with respect to the magnetic field sensor so that the sensor is suitably outside, approximately at the front, by a Flußleit-, bundle or shielding generated by the Flußleitstoff, so that even interact with the anchor-side permanent magnet means can not interfere.
  • each a single coil unit or a plurality of coil units individually or together on the shell side to assign a shell of a magnetically conductive material, such as soft iron, which realizes the magnetic flux-conducting means;
  • This shell can then be bent approximately cylindrically or cylinder-section-shaped, in accordance with further development, for example in the case of a coil pair, an axially extending, elongated shielding plate as flux guide element.
  • the slide or ram unit is releasably connected to the armature unit, in such a way that permanent magnet force of the permanent magnet means (releasably) holds the plunger unit to the armature unit.
  • the stationary magnetic field detection means realized, for example, as a stationary sensor unit
  • the permanent magnet unit provides the reliable, yet detachable one Connection between slide or ram unit and anchor unit forth (in that the anchor unit itself suitable permanent magnet means, such as a correspondingly magnetized disc has, and then the ram unit of magnetically conductive material, eg soft iron exists).
  • this arrangement is magnetically shielded from potentially interfering with the sensor detection influences the coil magnetic field.
  • the present invention is not limited thereto; rather, there are numerous ways and possibilities to realize a magnetic field sensor for the magnetic field detection means and suitably provide the armature unit adjacent to the housing.
  • the present invention can in principle already be realized favorably for a simple configuration from a single coil with this associated armature unit and corresponding to a sensor
  • the present invention Invention is not limited to such a configuration, but it is within the scope of preferred embodiments of the invention to provide a plurality of coil units, as well as a plurality of axially parallel or skew each other extending anchor units provide, which in turn are assigned to coil units, in which case either here individual flux guide elements can be provided for a common sensor, or multiple flux guide elements for a common sensor, or multiple flux guide elements can screen a plurality of sensors or suitably influence a coil field for them.
  • the present invention makes it possible in a surprisingly simple and effective manner to improve the technology already known from the internal state of the art with regard to its detection behavior, in particular its insensitivity to possible magnetic field influences of the energized coil, and thus also the present invention In view of a magnetic flux to make demanding or problematic operating conditions accessible.
  • the sensor unit 22 sits at the end side and at the end side of the strip-like-planar and in turn longitudinally formed flux-conducting element 35;
  • a shielding plate 36 is provided opposite the end face for further influencing the flux of the coil magnetic field of the coil pair 10a, 10b.
  • the single flux guide element 34 is replaced by a group of four cross-sectionally square flux guide elements 38, which are connected at one end by means of the shielding plate 36, a cuboid, the pair of coil units 10 a, 10 b receiving space span, thus providing an effective magnetic flux influencing while turn the sensor unit 22 outside this clamped interior for cooperation with the anchor units (or the permanent magnet disks 20 provided there) is held.
  • the fourth embodiment of Fig. 6 shows a conceptual connection of the embodiments two ( Fig. 4 ) and three ( Fig. 5 ):
  • the flux guide elements are realized from a pair of corner-side rods 38 having a square cross-section and a between the pair of coils 10 a, 10 b provided baffle 35 (analogous to Fig. 4 ).
  • the fifth embodiment according to Fig. 7 provides that both coils 10a, 10b are largely surrounded on the shell side by cylinder-section-like shell elements 40, 42, which in turn are brought together at the end, the sensor unit 22 opposite, flow-conducting to the plate 36.
  • the shells 40, 42 made of soft iron provide a predetermined flow and reach a principle according to Fig. 1a, 1b analogous effect.

Claims (10)

  1. Dispositif de réglage électromagnétique, en particulier dispositif de réglage d'arbre à cames, comprenant
    une unité d'induit (14) pouvant être entraînée le long de ou parallèlement à la direction axiale en réponse à une alimentation électrique d'une unité de bobine (10) stationnaire, orientée axialement, l'unité d'induit étant réalisée de manière à coopérer avec une unité de coulisseau et/ou de poussoir (16) s'étendant dans la direction axiale, en particulier une unité de poussoir provoquant un réglage d'arbre à cames d'un moteur à combustion interne,
    des moyens d'aimants permanents (20) sous forme d'une unité d'aimants permanents (14) étant prévus sur et/ou dans l'unité d'induit, laquelle est réalisée de telle sorte qu'elle entraîne l'unité d'induit par effet de répulsion magnétique du fait de l'alimentation électrique de l'unité de bobine, et l'unité de bobine et l'unité d'induit étant reçues au moins en partie dans une unité de boîtier ou de support,
    à l'unité de support étant associés des moyens de détection de champ magnétique stationnaires (22) réalisés en vue de la coopération magnétique sans contact avec les moyens d'aimants permanents et réalisés de telle sorte que dans un état alimenté en courant et dans un état non alimenté en courant de l'unité de bobine, une position axiale de l'unité d'induit et/ou de l'unité de coulisseau ou de poussoir puisse être déterminée par voie électronique par analyse d'un signal de détection de champ magnétique des moyens de détection de champ magnétique,
    à l'unité de bobine étant associés des moyens de conduction de flux magnétiques (30, 32 ; 34 ; 35 ; 36 ; 38 ; 40, 42) de telle sorte que ceux-ci dérivent un champ magnétique de bobine généré par l'unité de bobine par les moyens de détection de champ magnétique et/ou l'affaiblissent par rapport à ceux-ci,
    et les moyens de détection de champ magnétique présentant un capteur de champ magnétique étant au moins en partie entourés par une pulvérisation ou un surmoulage, en particulier polymère, réalisé(e) dans l'unité de boîtier ou de support.
  2. Dispositif selon la revendication 1, caractérisé en ce que les moyens de conduction de flux magnétiques sont réalisés à proximité de l'unité de bobine et de manière à s'étendre avec leur axe au moins en partie parallèlement à celle-ci.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les moyens de conduction de flux magnétiques sont réalisés sous forme d'au moins un élément de conduction de flux longiligne, de préférence en forme de plaque ou de profilé (30, 32 ; 34), auquel sont associés les moyens de détection de champ magnétique présentant le capteur de champ magnétique du côté frontal.
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé par une pluralité d'éléments de conduction de flux longilignes s'étendant parallèlement les uns aux autres (30, 32 ; 38) en tant que moyens de conduction de flux, qui couvrent un espace interne dans lequel est prévue l'au moins une unité de bobine, les moyens de détection de champ magnétique présentant le capteur de champ magnétique étant disposés à l'extérieur de l'espace interne couvert.
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que l'au moins un élément de conduction de flux longiligne est connecté au niveau d'un côté frontal opposé au capteur de champ magnétique à une plaque de support et/ou de blindage (36) conduisant le flux, laquelle s'étend de préférence dans un plan s'étendant perpendiculairement à l'axe.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les moyens de conduction de flux magnétiques sont réalisés sous forme d'au moins une coque (40, 42) en matériau magnétiquement conducteur entourant l'unité de bobine au moins en partie du côté de l'enveloppe.
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'unité de coulisseau ou de poussoir (16) est maintenue de manière desserrable sur l'unité d'induit par une force de rétention magnétique permanente des moyens d'aimants permanents (14).
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'une pluralité d'unités d'induit et/ou de coulisseau ou de poussoir (16) pouvant être entraînées de préférence indépendamment les unes des autres est prévue dans l'unité de boîtier ou de support.
  9. Dispositif selon la revendication 8, caractérisé en ce que dans l'unité de boîtier ou de support, est associé(e) à la pluralité des unités d'induit un élément de conduction de flux commun ou une pluralité correspondante d'éléments de conduction de flux, les moyens de conduction de flux présentant pour chaque unité de bobine au moins un élément de conduction de flux longiligne s'étendant avec son axe parallèle.
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que pour au moins deux de la pluralité des unités d'induit, il est prévu un capteur de champ magnétique commun en tant que moyen de détection de champ magnétique.
EP11735400.1A 2010-07-16 2011-06-29 Dispositif de positionnement électromagnétique Active EP2593945B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202010010371U DE202010010371U1 (de) 2010-07-16 2010-07-16 Elektromagnetische Stellvorrichtung
PCT/EP2011/060901 WO2012007279A2 (fr) 2010-07-16 2011-06-29 Dispositif de positionnement électromagnétique

Publications (2)

Publication Number Publication Date
EP2593945A2 EP2593945A2 (fr) 2013-05-22
EP2593945B1 true EP2593945B1 (fr) 2014-01-01

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EP11735400.1A Active EP2593945B1 (fr) 2010-07-16 2011-06-29 Dispositif de positionnement électromagnétique

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US (1) US9318247B2 (fr)
EP (1) EP2593945B1 (fr)
CN (1) CN103109331B (fr)
DE (1) DE202010010371U1 (fr)
WO (1) WO2012007279A2 (fr)

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EP3016117B1 (fr) 2014-10-31 2017-12-06 Husco Automotive Holdings LLC Appareil d'actionneur de broche-poussoir
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DE102017202592A1 (de) * 2017-02-17 2018-08-23 Robert Bosch Gmbh Steuerelektronik mit einem Magnetflussführungselement
DE102018102382A1 (de) 2018-02-02 2019-08-08 Eto Magnetic Gmbh Beheizbares elektromagnetisches Stellsystem sowie Verfahren
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Also Published As

Publication number Publication date
CN103109331B (zh) 2017-07-28
US9318247B2 (en) 2016-04-19
WO2012007279A3 (fr) 2012-03-08
WO2012007279A2 (fr) 2012-01-19
US20130113582A1 (en) 2013-05-09
EP2593945A2 (fr) 2013-05-22
DE202010010371U1 (de) 2011-10-17
CN103109331A (zh) 2013-05-15

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