EP3211645A1 - Electromagnetic acutator device - Google Patents

Abstract

The invention relates to an electromagnetic actuator device comprising a first yoke portion of a stationary yoke unit and activatable by energizing coil unit (44, 46) and relative to the yoke unit movably guided, cooperating with a driven side actuator and driven to perform an actuating armature anchoring means (40) with a second yoke portion (42) of the yoke unit cooperating to form an air gap located outside the first yoke portion for a magnetic flux generated by the activated coil unit, the coil unit having a plurality of individual coils (44, 46) to which anchor means in the form of a common armature unit (40) are adjacently associated so as to form a plurality of flux guide circuits, each passing through a respective single coil and the common armature unit, a magnetic flux of the respective individual coils forming in the second yoke section when current flows through the coil unit is added and / or rectilinearly superimposed, wherein the working air gap between the shell side adjacent to the second yoke portion (42) and the shell side adjacent to each other provided individual coils.

Description

The present invention relates to an electromagnetic actuator device according to the preamble of the main claim.

Such a device is for example from the JP 2000 170951 A is known and relates to an electromagnetic actuator device for implementing a 3-way valve, in which, in departure from the usual and beyond known as vorzusetzenden actuator technologies, the coil winding does not surround the armature (or the associated working air gap), but the coil winding, in the Type of "outsourced coil" is offset laterally relative to an armature movement longitudinal axis (or an associated air gap) and a magnetic flux transfer to the armature unit or to the air gap by means of suitable flux-conducting portions of the yoke.

However, the disclosure is according to JP 2000 170951 A in a very special technical context, which in particular makes a transfer to other, generic actuating tasks (or else to other valve drives) only possible to a very limited extent. In addition, the known from this prior art device requires a not inconsiderable space, in addition, a heat dissipation from the known device is not without problems.

Object of the present invention is therefore to provide an electromagnetic actuator according to the preamble of the main claim, wherein a Bestrombare coil unit encloses a first yoke portion of a stationary yoke unit and relative to the yoke unit movably guided, cooperating with a control partner and drivable for performing an actuating anchor means a second yoke portion of the yoke unit to form the working air gap cooperate to improve in terms of a more compact, and in particular more flexible mechanical realization, in particular to provide the ability to separate the coil unit from the working air gap, and the ability to create an improved To realize heat dissipation or heat to be distributed locally (and thus less concentrated on one place).

The object is achieved by the electromagnetic actuator device having the features of the main claim; advantageous developments of the invention are described in the subclaims.

In an advantageous manner according to the invention, it is provided, on the one hand, with locally separated armature of the coil unit (ie the coil unit does not surround the working air gap) of the coil unit to assign at least one, preferably several working air gap (s) corresponding to one or more armature unit (s) ) interact. In that regard, the magnetic flux generated by the coil unit for the plurality of anchor units, according to a flow distribution to be described further development, can be used.

Thus, within the scope of the invention, it is already possible to solve the problem by a generic electromagnetic actuator device in which only one (at least one) armature unit is provided and laterally spaced from the coil unit or the first yoke section for realizing the inventive principle and / or adjacent.

Equally encompassed by the invention is the independently claimed solution principle that the coil unit is realized in the form of a plurality of separate, yet magnetic flux interconnected individual coils, which according to further preferred embodiments of the invention then in solution a locally distributed arrangement each (smaller to be dimensioned and thus also potentially less heat-generating) individual coils allow their respective magnetic flux then cumulatively for the common anchor (or the associated working air gap) merged and added so far.

It is common to all aspects of the invention that the working air gap (or the at least one air gap provided within the scope of the first aspect of the invention is / are formed outside the first yoke section, ie is not enclosed by a coil unit (typically cylindrical or rectangular in design) but instead is laterally outsourced in the sense discussed above.

In a particularly preferred embodiment of the first aspect of the invention, namely the formation of a single or a plurality of magnetic flux circuits in the yoke unit, wherein each of the flux circuits by the (common coil carrying) first yoke portion and via a respective one of the plurality of anchor units associated air gaps is a magnetic flux resistance of Flußleitmitteln of at least one of the magnetic flux control circuits in response to a flowing magnetic flux therein variable. This happens in particular in that saturation occurs as a result of suitable design of an effective flux-conducting cross-section of these flux-conducting means above a predetermined magnetic flux density, and therefore the magnetic flux resistance is increased from this threshold. The consequence of this effect is that a magnetic flux is then displaced from the relevant flux circuit into another of the flux circuits, insofar as an armature movement can then be triggered or influenced.

Further possibilities for presetting or predetermined influencing of the movement behavior of the plurality of anchor units (in the respective yoke branches) is to design the air gaps differently (in each case based on a predetermined, comparable anchor position, for example a stop position of the anchor units). In this case, it is preferable, in particular according to the invention, to vary the effective air gap in a respective yoke branch or to set it up differently according to an intended movement behavior (for example, an intended sequence of activation).

Another way to influence the switching or movement behavior of a respective armature unit of the anchor means is to associate this armature spring means or the like power storage and about further education to store one or more of the armature units against a restoring force of such a spring or lead (where in turn further education by different configurations such as the spring forces then the respective switching or movement behavior of the associated anchor units can be influenced in a predetermined manner).

The electromagnetic actuator device according to the second aspect of the invention, according to which a plurality of individual coils (in potentially small installation space) suitably arranged adjacent to the second yoke section with the working air gap, so that the working air gap lies between the individual coils, advantageously provides that at least one of the individual coils, more preferably, all of the individual coils extend parallel to a direction of movement of the armature unit, so that, for example, when arranging the individual coils around the working air gap around, a particularly compact unit can be created, which nevertheless must have no symmetry.

In particular, the present invention also makes it possible by the variability described to optimize one (or, in the case of several individual coils, several) effective cross-sectional areas of the first yoke section, so that, for example, the coil unit provided thereon (with regard, for example, to the copper weight of the winding) can be optimized ,

By further education suitable provided Flußleitmittel in the form of suitable elements (which can be further preferably realized as production technology favorable punched sheets or metal stacks) can be as a specific purpose (or respective site and the applicable installation conditions) implemented low-priced construction structures: Thus, for example, according to further developments, it is preferable to realize these flux-conducting elements as flat or planar elements, which are furthermore advantageous approximately both sides of central axes of both the plurality of coil devices, as well as the second yoke portion (with the working air gap) are provided for flux-conducting connection thereof, so again a simple and mass production manufacturable, nevertheless optimized in terms of a space utilization arrangement arises (in particular also constructive There are possibilities to make thermal optimizations).

Thus, it is advantageous and further development according to the invention in particular also allows to realize asymmetrical arrangements of the plurality of coil units in conjunction with the second yoke, for about this purpose and in an embodiment of the described flat plate-shaped flux guide these an angled (or with each other in a Angle approximately between 90 ° and 180 ° realized in a plane of a flat side to each other standing legs) structure can be.

Within the scope of further preferred embodiments of the second aspect of the invention, it is also possible and preferred to suitably provide analogously, for example, the cross-sectional influencing and / or flow resistance influencing provided within the respective flux circuit for the first aspect of the invention (according to main claim or independent claim 15), as well as, for example Anchoring means against a suitable restoring force offering spring means can be stored or guided.

Analogously, it is provided within the scope of further preferred embodiments of the first aspect of the invention to realize the yoke unit by means of suitable sheet-shaped, more preferably stacked by flow punching, optionally suitably stacked to reduce eddy currents here, in addition to manufacturing advantages.

It is also considered to be encompassed and disclosed by the present invention that, for example, the space-optimized (and, for further training, approximately angled) space-saving geometry realized by means of the flat or flat flux-conducting means is also analogous can be provided for implementation forms, in which about the end of the flux guide anchor units (with a respective working air gap) are provided suitable, while in a central region, the common coil unit is provided.

In the context of preferred developments of the invention, it is further to provide the individual coils within the scope of the invention with any circumferential contours or cross-sections, in order to turn to use the constructional-constructive optimization possibilities; In addition to cylindrical outer contours, it is claimed in particular advantageous and weiterbildungsgemäß to design one or more of the individual coils cross-sectionally rectangular.

As a result, the electromagnetic actuator device according to the invention is indeed preferably for the realization of hydraulic or pneumatic valve solutions, especially in the vehicle sector, but is not limited to these applications. On the contrary, the present invention can be used favorably and suitably configured for virtually any field of application in which structural or spatial flexibility can be used in conjunction with flexibly configurable magnetic flux guides or flow paths within the respective flux guide circuits.

Fig. 1:

eine Prinzipdarstellung einer elektromagnetischen Aktuatorvorrichtung gemäß dem ersten Erfindungsaspekt und gemäß einer ersten Ausführungsform dieser Erfindung zum Verdeutlichen des prinzipiellen Zusammenwirkens der verschiedenen Funktionskomponenten;

Fig. 2-Fig. 4:

verschiedene Betriebs- bzw. Magnetfluss- und Schaltzustände der Vorrichtung gemäß Fig. 1, verdeutlicht durch einen jeweiligen Magnetfluss symbolisierende Pfeilschaaren;

Fig. 5:

eine Perspektivansicht einer Ausführungsform der elektromagnetischen Aktuatorvorrichtung des zweiten Aspekts der Erfindung gemäß einem weiteren Ausführungsbeispiel;

Fig. 6 - Fig. 8:

konstruktive Varianten der Ausgestaltung eines Flussleitelements in weiteren Ausführungsbeispielen gegenüber dem Ausführungsbeispiel der Fig. 5.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings; these show in:

Fig. 1:

a schematic diagram of an electromagnetic actuator device according to the first aspect of the invention and according to a first embodiment of this invention to illustrate the basic interaction of the various functional components;

Fig. 2-Fig. 4:

various operating or magnetic flux and switching states of the device according to Fig. 1 , illustrates by a respective magnetic flux symbolizing arrow heads;

Fig. 5:

a perspective view of an embodiment of the electromagnetic actuator device of the second aspect of the invention according to another embodiment;

Fig. 6 - Fig. 8:

constructive variants of the embodiment of a Flußleitelements in further embodiments with respect to the embodiment of Fig. 5 ,

The Fig. 1 illustrates in the schematic longitudinal sectional view of an electromagnetic actuator device for driving two anchor units 10, 12 by means of a common, centrally located (centrally) between them on a yoke section 13 coil unit 14. More specifically, as schematically with reference to the graph of Fig. 1 recognizable, the elongated armature units 10 and 12 shown axially movably guided (in a movement and drive direction perpendicular in the plane), wherein the armature units 10 and 12 cooperate with stationary yoke sections 15 and 16 and, for the realization thereof, together by the coil unit 14 extending flow control circuits, which are guided over flow-conducting connection sections 18 to 24. Accordingly arise for the anchor units 10 and 12 effective air gaps 26 and 28 respectively.

The Fig. 2 to 4 illustrate various operating conditions in response to energization of the coil unit 14: So shows about the Fig. 3 two flow paths in the flux guide circuits running through the respective armatures 10 and 12, respectively, on the basis of the arrowheads 30 and 32, these magnetic fluxes flowing through the yoke section 13 ("first yoke section") associated with the coil unit 14, as symbolized by the arrowhead 34. Is against it, as in the Fig. 2 shown by a shortened air gap 28 an effective flow resistance in the right flux guide circuit (ie with respect to the armature unit 12) is reduced with respect to the other arm, the magnetic flux concentrates as indicated by the arrowhead 36 in FIG Fig. 2 shown on this right area, with the effect that primarily a driving effect on the armature unit 12 is formed in the direction of the static element 16, according to this air gap is then closed (representation of Fig. 4 ). Due to this effect and a corresponding (cross-sectional) dimensioning in the right-hand flux circuit (eg the flux-conducting components 16, 20, 24 and 12), however, saturation then occurs in this flux circuit, with the effect that this in turn increases the flow resistance Part of the magnetic flux in the left Flußleitkreis, effective for the anchor unit 10, is displaced. Accordingly, it comes through this displaced flow 38 to a force applied to the armature unit 10, which subsequently closes the air gap 30. Thus, the asymmetric configuration shown (starting from the Fig. 2 ), such as a different, here temporally successive, movement or switching behavior of the anchor units can be provoked.

Alternatively, such an effect can also be realized by suitably provided on the anchor units spring means (with correspondingly different spring forces), again in addition or alternatively by means of predetermined adjusted and then corresponding saturation reaching effective magnetic flux cross sections of the flux-conducting components involved.

Mechanically located in the embodiment of the Fig. 1 to 4 both anchor units 10 and 12 directly adjacent to the coil circumference or this, so that in potentially a coil efficiency increasing manner an optimized field line bundling over both armatures and thus takes place on both sides of the coil unit, compare the Fig. 3 , A geometric-mechanical asymmetry, such as by variation of the respective anchor distances from the central coil, then in turn permits the setting up of suitable deviating flow courses or anchor movements determined therefrom. Also, in the context of the first aspect of the invention, an embodiment of the invention is provided, which in the manner not shown in the figures, only one anchor unit with an associated second yoke portion, according to the invention preferably laterally spaced or adjacent to the coil unit, provides. Even this simplest embodiment already realizes an inventive principle of the outsourced armature, namely an armature provided within a flow circle branch and laterally or adjacently arranged (including the associated air gap), so that an armature movement direction while further education parallel to an extension direction of the coil unit (or the associated first Jochabschnitts) can take place, but these axes are no longer coaxial.

Based on Fig. 5 to 8 The second aspect of the invention will now be described with reference to a further embodiment. A first variant illustrates the Fig. 5 in the perspective view: on both sides of an axially movable armature 40 and a stationary yoke portion 42 having central arrangement, a pair of individual coils 44 and 46 is provided such that armature 40 and stator 42 are framed on both sides of the individual coils 44, 46. A magnetic flux (resulting when the coils are energized) of the coils 44 and 46, respectively, is fed into the armature 40 or the stator 42 via common elongated plate-shaped flux conducting elements 48 and 50, the elements 48 and 50 additionally being used for a mechanical connection the overall arrangement (with an outlet opening 52 for the anchor unit) provide.

With regard to a flow guide in this device, in turn, two flux guide circuits are formed, wherein a respective one of the flux circuits runs through one of the individual coils 44 and 46 and both flux circuits then flow together through the armature-stator arrangement 40, 42 (insofar the flow path corresponds analogously of the Fig. 3 but with a provision of a central armature-stator arrangement and two external individual coils).

This basic configuration of the Fig. 5 is, however, not limited to two individual coils, nor about the symmetrical arrangement shown; rather, by varying the geometry of the elements 48, 50, a change in distance can take place, it can also, as in the Fig. 6 to 8 clarifies, one opposite the elongated elements 48, 50 suitably kinked configuration, or there may be more than two individual coils to one (or even more) common armature-stator assembly (s) around provided: So describes about the Fig. 6 in plan view, a variation of the elements 48 and 50, such that now two legs 54, 56, angled away from each other by an angle 58 of about 135 °, extend and end, compare Fig. 8 , 44 are connected to the individual coils 44 and 46, respectively. A comparison arrangement of the presupposed as known, traditional type in the representation of Fig. 7 illustrates the resulting installation space or geometry advantage: namely, in order to produce a magnetic flux behavior comparable to the pair of individual coils 44, 46, a single coil of a winding cross-section 60, as in FIG Fig. 7 indicated to be present, but possibly in a limited installation space (adapted to the configuration of Fig. 6, 8 ) not possible.

A further advantage of the solution according to the invention with a plurality of individual coils provided adjacent to an armature-stator arrangement with an adding or overlapping flow profile, such as in FIG Fig. 5 respectively. 6 and 8 shown, is that possible lateral forces are reduced (to the anchor) compared to a solution with only one adjacent the anchor unit outsourced coil (as far as a mutual compensation takes place, see for example the flowchart of Fig. 3 in analogous application to an arrangement with two external individual coils). Especially for products with high service life requirements, such as in the valve area, such a reduction of the lateral forces on the anchor has a favorable effect on wear and therefore an effective service life.

The present invention, regardless of the possible or other possible embodiments, offers numerous practical advantages: For example, arranging one (or more) armature unit (s) in a use as a valve offers significantly more flexible connection possibilities in the configuration according to the invention adjacent to the coil unit (s) Coil units), as compared to the known prior art, in which typically the elongated armature unit is surrounded by the coil unit (typically cylindrical-radial). Accordingly, the working air gap can be made more flexible (and suitable for a particular application).

In addition, according to further education advantageous is provided, adapted to respective installation and room conditions, not to provide a respective coil (or the plurality of individual coils) with cylindrical windings, but to provide approximately rectangular or other coil cross-sections. This is especially true in cooperation with flux-conducting elements, which are realized by means of (typically produced by punching) sheets and further advantageously present in suitable stacking configurations.

This also makes it possible to use the advantage of an eddy-current reduction (especially for higher frequencies) of flat flux-conducting elements for the present invention.

Claims (8)

Electromagnetic actuator device with
An armature means (40), which surrounds a first yoke section of a stationary yoke unit and can be activated by energization and which is movably guided relative to the yoke unit and cooperates with an output side adjusting partner and which can be driven to execute an adjusting movement, comprising a second yoke section (42) Yoke unit to form an air gap located outside the first yoke portion for a magnetic flux generated by the activated coil unit,
characterized in that
the coil unit comprises a plurality of individual coils (44, 46) to which anchoring means in the form of a common armature unit (40) are adjacently associated so as to form a plurality of flux circulation circuits, each passing through a respective single coil and the common armature unit magnetic flux forming the respective individual coils in the second yoke section is added and / or rectified superimposed upon energization of the coil unit,
wherein the working air gap between the shell side adjacent to the second yoke portion (42) and the shell side adjacent to each other provided individual coils. Apparatus according to claim 1, characterized in that at least one of the individual coils has an axial extent which extends parallel to a direction of movement of the armature unit or with respect to the direction of movement forms an angle <10 °, preferably <5 °. Apparatus according to claim 1 or 2, characterized in that the plurality of individual coils on the shell side adjacent to the second yoke portion (42) is provided and / or the individual coils on the ends of the plurality of individual coils attacking, in a plane perpendicular to a coil longitudinal axis and / or the direction of movement of the armature unit extending flux conducting means (48, 50) are flux-conductively connected to each other and to the second yoke portion. Apparatus according to claim 3, characterized in that the Flußleitmittel as flat and / or a planar surface having elements and / or portions of the yoke unit are realized, the respective end contact the first yoke portion of a respective single coil flux and preferably at both ends and parallel to each other between the Extend plurality of individual coils and the second yoke portion. Apparatus according to claim 3 or 4, characterized in that the plane flux guide, based on a contact region for the second yoke portion, two legs (54, 56) form, which extend diametrically or between them an angle (58) <180 ° span. Device according to one of claims 1 to 5, characterized in that the individual coils have a cylindrical or polygonal, in particular rectangular, outer and / or cross-sectional contour. Device according to one of claims 1 to 6, characterized in that the yoke unit and / or the first yoke portion and / or the second yoke portion and / or a Flußleitabschnitt between the first and the second yoke portion as a sheet metal element, in particular stackable sheet metal element, and / or as a layer arrangement is realized from a plurality of sheet metal elements. Use of the electromagnetic actuator device according to one of claims 1 to 7 for the realization of a pneumatic or hydraulic valve, in particular for a motor vehicle.

Images