EP2133887A1 - Magnetic circuit with activatable permanent magnet - Google Patents

Magnetic circuit with activatable permanent magnet Download PDF

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Publication number
EP2133887A1
EP2133887A1 EP09007666A EP09007666A EP2133887A1 EP 2133887 A1 EP2133887 A1 EP 2133887A1 EP 09007666 A EP09007666 A EP 09007666A EP 09007666 A EP09007666 A EP 09007666A EP 2133887 A1 EP2133887 A1 EP 2133887A1
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EP
European Patent Office
Prior art keywords
magnetic circuit
coil
permanent magnet
armature
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.)
Granted
Application number
EP09007666A
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German (de)
French (fr)
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EP2133887B1 (en
Inventor
Andreas Rimbrecht
Sabine Krause
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.)
KENDRION (DONAUESCHINGEN/ENGELSWIES) GMBH
Original Assignee
Kendrion Magnettechnik GmbH
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Application filed by Kendrion Magnettechnik GmbH filed Critical Kendrion Magnettechnik GmbH
Publication of EP2133887A1 publication Critical patent/EP2133887A1/en
Application granted granted Critical
Publication of EP2133887B1 publication Critical patent/EP2133887B1/en
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    • 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
    • H01F7/1615—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
    • H01F7/081—Magnetic constructions
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

Definitions

  • the invention relates to a magnetic circuit having the features of the preamble of patent claim 1.
  • Magnetic circuits are known from the prior art, for example, from hinged armature magnets, rotary magnets or solenoids.
  • Known lifting magnets have a magnetic circuit with at least one energizable coil which is arranged on a pole core, at least one movable armature, a yoke for guiding the magnetic field and at least one permanent magnet.
  • the energizable coil is arranged circumferentially to the pole core and the movable armature, while the yoke closes the magnetic circuit between the poles of the energizable coil for guiding the magnetic field.
  • the known lifting magnet further comprises a return spring is provided which resets the armature in the currentless state of the coil in a starting position.
  • the permanent magnet is arranged in the magnetic circuit in the flow direction and thus amplifies the lifting force of the electromagnet formed by the magnetic circuit.
  • a disadvantage of the known arrangement is that the performance of magnetic circuits with a built-permanent magnet is only marginally better than without the permanent magnet, since a force component induced by the permanent magnet is permanently present and therefore the return spring and this amount must be more strongly dimensioned. In final defect so the force component of the permanent magnet is hardly usable.
  • a magnetic circuit according to the invention thus has at least one coil that can be energized, which is arranged on a pole core, at least one movable armature, a yoke for guiding a magnetic field and at least one permanent magnet, wherein the at least one permanent magnet is arranged switchable into the magnetic circuit.
  • the force component of the permanent magnet during a de-energized state of the coil is not involved in the magnetic circuits with and is directed only when current is applied to the coil in the magnetic circuit. It is thereby possible to use the force component of the permanent magnet almost completely.
  • the permanent magnet can be arranged for example in the de-energized state of the coil in a magnetic short circuit, which is interrupted by energizing the coil.
  • the armature may, for example, have a step which is designed in such a way that it is arranged in the deenergized state of the coil by the return spring, that the short circuit for the permanent magnet is closed and that in the energized state of the coil, the position of the armature is changed such that the short circuit of the permanent magnet is interrupted and the field lines are introduced into the magnetic circuit of the coil.
  • the armature further has a control cone for adjusting the stroke force characteristic.
  • the permanent magnet may be formed, for example, as a bar magnet, which is arranged laterally and in the circumferential direction of the coil turns.
  • the orientation of the magnetic poles preferably takes place corresponding to the orientation of the magnetic field that can be generated by the coil.
  • a common yoke is provided for the magnetic circuit and the short circuit of the permanent magnet to direct the magnetic field lines.
  • the coil may for example be arranged on a coil carrier made of plastic, whereby an electrical insulation of the coil opposite in the coil core and the armature and a simple interchangeability of the coil is achieved. It is also possible to ensure by the coil support a smooth surface to adjacent components of the magnetic circuit.
  • the permanent magnet can also be enclosed in plastic on the top and bottom side or on a corresponding carrier to sit.
  • a corresponding carrier made of plastic for the permanent magnet By a corresponding carrier made of plastic for the permanent magnet, a defined orientation and a correct arrangement of the permanent magnet is ensured.
  • a magnetic circuit according to the invention is preferably used in a lifting magnet, for example in a triggering magnet.
  • FIG. 1 shows a magnetic circuit 10 in which a coil 11 is disposed about a pole core 12A and about an armature 12B movable along a longitudinal axis.
  • a yoke 13 is provided, which connects the magnetic poles of the coil.
  • a permanent magnet 14 is arranged, which is aligned such that the magnetic field of the permanent magnet 14 extends in the same direction to the magnetic field generated by the coil.
  • the armature 12 b is arranged in a remote from the pole core 12 a starting position.
  • a short circuit 20 for the magnetic field of the permanent magnet 14 is provided, which is closed by the armature 12b in the de-energized state of the coil. Since magnetic field lines always choose the path of the lowest magnetic resistance, the majority of the magnetic field generated by the permanent magnet 14 is directed via the short circuit 20, so that only a small force component in the direction of the pole core 12 a occurs.
  • FIG. 2 shows the magnetic circuit FIG. 1 with energized coil.
  • the armature 12 b is designed such that it has a stage 121 which is arranged such that it generates an air gap 22 in the short circuit when the coil 11 is energized and thus the magnetic field lines of the permanent magnet 14 from the short circuit 20 in the magnetic circuit 10th with the coil 11 redirects. It is thus possible by a simple exemption in the contour of the armature 12 b to redirect the magnetic field lines in the magnetic circuit 10.
  • a transition between the pole core 12 a and the armature 12 b is also provided with a control cone 123 which serves to set a continuous control characteristic of the magnetic circuit 10.
  • FIG. 3 is the magnetic circuit 10 in a lifting magnet, as used for example in tripping magnets used.
  • the pole core 12a and the armature 12b are arranged in this embodiment on a plunger 18 which is fixedly connected to the armature.
  • a return spring 17 Between the pole core 12a and the armature 12b there is further arranged a return spring 17, which returns the armature 12a to the starting position with the short circuit 20 closed when the coil is not energized.
  • the Coil 11 is arranged concentrically and circumferentially to the pole core 12a and the armature 12b and is seated on a coil carrier 111 made of plastic.
  • the permanent magnet 14 is also surrounded on the upper side and lower side by plastic and is arranged below the coil 11 between the yoke 13 and a guide plate 15 for guiding the magnetic field lines.
  • the short circuit 20 in the lower part of FIG. 3 is like in the FIGS. 1 and 2 represented by the contour of the armature closable and openable whereby a strong magnetic field of the permanent magnet 14 by a relatively weakly dimensioned coil 11 is controllable.
  • FIG. 4 shows a plan view of a section along the line AA through the lifting magnet FIG. 3 ,
  • the arrangement of the permanent magnets 14 between the yoke 13 and the guide plate 15 can be seen particularly well.
  • the permanent magnets 14 are rod-shaped and are parallel to each other.
  • the centrally arranged and cylindrically shaped armature 12b with the concentrically arranged plunger 18 can be seen particularly well.

Abstract

The magnetic circuit (10) comprises a current carrying coil (11), which is arranged at a pole core (12a). A return spring (17) is provided, which resets an armature (12b) during currentless state of the coil. A yoke (13) is provided for guiding a magnetic field. A permanent magnet (14) is arranged in the magnetic circuit in an inserting manner.

Description

Die Erfindung betrifft einen magnetischen Kreis mit den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to a magnetic circuit having the features of the preamble of patent claim 1.

Magnetische Kreise sind aus dem Stand der Technik beispielsweise aus Klappankermagneten, Drehmagneten oder Hubmagneten bekannt. Bekannte Hubmagneten weisen einen magnetischen Kreis mit wenigstens einer bestrombaren Spule, die an einem Polkern angeordnet ist, wenigstens einem bewegbaren Anker, einem Joch zur Führung des Magnetfelds und wenigstens einem Permanentmagneten auf. Die bestrombare Spule ist dabei umfänglich zu dem Polkern und dem bewegbaren Anker angeordnet, während das Joch den magnetischen Kreis zwischen den Polen der bestrombaren Spule zur Führung des Magnetfelds schließt. In den bekannten Hubmagneten ist des weiteren eine Rückstellfeder vorgesehen, die den Anker in unbestromten Zustand der Spule in eine Ausgangsposition rückstellt. Der Permanentmagnet ist in dem magnetischen Kreis in Flussrichtung angeordnet und verstärkt damit die Hubkraft des durch den magnetischen Kreis ausgebildeten Elektromagneten.Magnetic circuits are known from the prior art, for example, from hinged armature magnets, rotary magnets or solenoids. Known lifting magnets have a magnetic circuit with at least one energizable coil which is arranged on a pole core, at least one movable armature, a yoke for guiding the magnetic field and at least one permanent magnet. The energizable coil is arranged circumferentially to the pole core and the movable armature, while the yoke closes the magnetic circuit between the poles of the energizable coil for guiding the magnetic field. In the known lifting magnet further comprises a return spring is provided which resets the armature in the currentless state of the coil in a starting position. The permanent magnet is arranged in the magnetic circuit in the flow direction and thus amplifies the lifting force of the electromagnet formed by the magnetic circuit.

Ein Nachteil der bekannten Anordnung ist, dass die Leistung von magnetischen Kreisen mit einem eingebauten Permanentmagneten nur unwesentlich besser als ohne den Permanentmagneten ist, da eine durch den Permanentmagneten induzierte Kraftkomponente dauerhaft vorhanden ist und daher die Rückstellfeder und diesen Betrag stärker dimensioniert sein muss. Im Enddefekt ist also die Kraftkomponente des Permanentmagneten kaum nutzbar.A disadvantage of the known arrangement is that the performance of magnetic circuits with a built-permanent magnet is only marginally better than without the permanent magnet, since a force component induced by the permanent magnet is permanently present and therefore the return spring and this amount must be more strongly dimensioned. In final defect so the force component of the permanent magnet is hardly usable.

Hier setzt die vorliegende Erfindung an.This is where the present invention begins.

Es ist die Aufgabe der Erfindung einen magnetischen Kreis mit einem Permanentmagneten zur Verfügung zu stellen, bei dem die Kraftkomponente des Permanentmagneten annährend vollständig nutzbar ist.It is the object of the invention to provide a magnetic circuit with a permanent magnet, in which the Force component of the permanent magnet is almost completely usable.

Diese Aufgabe wird durch einen magnetischen Kreis mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by a magnetic circuit having the features of patent claim 1.

Ein Erfindungsgemäßer magnetischer Kreis weist damit wenigstens eine bestrombare Spule, die an einem Polkern angeordnet ist, wenigstens einen bewegbaren Anker, ein Joch zur Führung eines Magnetfelds und wenigstens einen Permanentmagneten auf, wobei der wenigstens einen Permanentmagnet in den magnetischen Kreis zuschaltbar angeordnet ist.A magnetic circuit according to the invention thus has at least one coil that can be energized, which is arranged on a pole core, at least one movable armature, a yoke for guiding a magnetic field and at least one permanent magnet, wherein the at least one permanent magnet is arranged switchable into the magnetic circuit.

Durch eine zuschaltbare Ausbildung des Permanentmagneten ist die Kraftkomponente des Permanentmagneten während eines unbestromten Zustands der Spule nicht in den magnetischen Kreisen mit eingebunden und wird erst bei Bestromung der Spule in den magnetischen Kreis gelenkt. Es ist dadurch möglich die Kraftkomponente des Permanentmagneten annährend vollständig auszunutzen.By a switchable design of the permanent magnet, the force component of the permanent magnet during a de-energized state of the coil is not involved in the magnetic circuits with and is directed only when current is applied to the coil in the magnetic circuit. It is thereby possible to use the force component of the permanent magnet almost completely.

Der Permanentmagnet kann beispielsweise im unbestromten Zustand der Spule in einem magnetischen Kurzschlusskreis angeordnet sein, der durch Bestromung der Spule unterbrechbar ist.The permanent magnet can be arranged for example in the de-energized state of the coil in a magnetic short circuit, which is interrupted by energizing the coil.

Es ist dadurch möglich eine Rückstellfeder, die den Anker, in unbestromtem Zustand der Spule in eine Ausgangsposition zurückstellt, derart zu dimensionieren, dass sie lediglich die durch Gewichtskraft des Ankers sowie die entstehende Reibung überwindet. Die Kraftkomponente des Permanentmagneten ist dadurch annähernd vollständig nutzbar.It is thereby possible a return spring, which returns the armature, in the currentless state of the coil in an initial position, to be dimensioned such that it only overcomes the weight of the armature and the resulting friction. The force component of the permanent magnet is thereby almost completely usable.

Eine Möglichkeit um den Permanentmagneten in den magnetischen Kreis zu schalten ist durch eine konturierte Ausbildung des Ankers gegeben. Der Anker kann beispielsweise eine Stufe aufweisen, die derart ausgebildet ist, dass sie in unbestromtem Zustand der Spule durch die Rückstellfeder so angeordnet ist, dass der Kurzschlusskreis für den Permanentmagneten geschlossen ist und dass in bestromtem Zustand der Spule die Position des Ankers derart verändert wird, dass der Kurzschlusskreis des Permanentmagneten unterbrochen ist und die Feldlinien in den magnetischen Kreis der Spule eingeleitet werden.One way to switch the permanent magnet in the magnetic circuit is given by a contoured design of the armature. The armature may, for example, have a step which is designed in such a way that it is arranged in the deenergized state of the coil by the return spring, that the short circuit for the permanent magnet is closed and that in the energized state of the coil, the position of the armature is changed such that the short circuit of the permanent magnet is interrupted and the field lines are introduced into the magnetic circuit of the coil.

Es ist so auf einfache Art und Weise möglich mit einer schwachen Spule ein starkes Magnetfeld eines Permanentmagneten zu steuern.It is thus possible in a simple way with a weak coil to control a strong magnetic field of a permanent magnet.

In einer weiteren Ausbildungsform weist der Anker des weiteren einen Steuerkonus zur Anpassung der Hub-Kraftkennlinie auf.In a further embodiment, the armature further has a control cone for adjusting the stroke force characteristic.

Der Permanentmagnet kann beispielsweise als Stabmagnet ausgebildet sein, der seitlich und in Umfangsrichtung der Spulenwindungen angeordnet ist. Die Ausrichtung der Magnetpole erfolgt vorzugsweise korrespondierend zur Ausrichtung des durch die Spule erzeugbaren Magnetfelds.The permanent magnet may be formed, for example, as a bar magnet, which is arranged laterally and in the circumferential direction of the coil turns. The orientation of the magnetic poles preferably takes place corresponding to the orientation of the magnetic field that can be generated by the coil.

In einer bevorzugten Ausführungsform ist für den magnetischen Kreis und den Kurzschlusskreis des Permanentmagnets ein gemeinsames Joch vorgesehen um die Magnetfeldlinien zu lenken.In a preferred embodiment, a common yoke is provided for the magnetic circuit and the short circuit of the permanent magnet to direct the magnetic field lines.

Durch ein gemeinsames Joch ist es möglich eine Umlenkung des Magnetfelds des Permanentmagneten allein durch die konturierte Ausführung des Ankers zu gewährleisten.By a common yoke, it is possible to ensure a deflection of the magnetic field of the permanent magnet solely by the contoured design of the armature.

Die Spule kann beispielsweise auf einem Spulenträger aus Kunststoff angeordnet sein, wodurch einen elektrischen Isolierung der Spule gegenüber in dem Spulenkern und dem Anker sowie eine einfache Austauschbarkeit der Spule erzielt wird. Es ist des weiteren möglich durch den Spulenträger eine glatte Oberfläche zu angrenzenden Bauteilen des magnetischen Kreises zu gewährleisten.The coil may for example be arranged on a coil carrier made of plastic, whereby an electrical insulation of the coil opposite in the coil core and the armature and a simple interchangeability of the coil is achieved. It is also possible to ensure by the coil support a smooth surface to adjacent components of the magnetic circuit.

Der Permanentmagnet kann ebenfalls ober- und unterseitig in Kunststoff eingefasst sein bzw. auf einem entsprechenden Träger sitzen. Durch einen entsprechenden aus Kunststoff ausgebildeten Träger für den Permanentmagneten wird eine definierte Ausrichtung sowie eine korrekte Anordnung des Permanentmagneten gewährleistet.The permanent magnet can also be enclosed in plastic on the top and bottom side or on a corresponding carrier to sit. By a corresponding carrier made of plastic for the permanent magnet, a defined orientation and a correct arrangement of the permanent magnet is ensured.

Ein erfindungsgemäßer magnetischer Kreis wird bevorzugter Weise in einem Hubmagneten, beispielsweise in einem Auslösemagnet, eingesetzt.A magnetic circuit according to the invention is preferably used in a lifting magnet, for example in a triggering magnet.

Die vorliegende Erfindung wird nachfolgend unter Bezugnahme auf die beigefügten Figuren näher erläutert. Gleiche oder funktionsgleiche Komponenten tragen dabei stets gleiche Bezugszeichen.The present invention will be explained in more detail with reference to the accompanying figures. The same or functionally identical components always carry the same reference numerals.

Es zeigen:Show it:

Figur 1FIG. 1
einen magnetischen Kreis mit zuschaltbarem Permanentmagneten und unbestromter Spule,a magnetic circuit with a switchable permanent magnet and a non-energized coil,
Figur 2FIG. 2
den magnetischen Kreis aus Figur 1 mit bestromter Spule,the magnetic circuit FIG. 1 with energized coil,
Figur 3FIG. 3
ein Anwendungsbeispiel des magnetischen Kreises aus den Figuren 1 und 2 in einem Hubmagneten, undan example of application of the magnetic circuit of the FIGS. 1 and 2 in a lifting magnet, and
Figur 4FIG. 4
eine Draufsicht auf einen Schnitt entlang der Linie A-A durch den Hubmagneten aus Figur 3.a plan view of a section along the line AA through the lifting magnet FIG. 3 ,

Figur 1 zeigt einen magnetischen Kreis 10 bei dem eine Spule 11 um einen Polkern 12A sowie um einen entlang einer Längsachse bewegbaren Anker 12B angeordnet ist. Zur Führung eines durch die Spule 11 erzeugbaren Magnetfelds ist ein Joch 13 vorgesehen, das die magnetischen Pole der Spule verbindet. In einem ankerseitigen Teil des Jochs 13 ist ein Permanentmagnet 14 angeordnet, der derart ausgerichtet ist, dass das Magnetfeld des Permanentmagneten 14 gleichsinnig zu dem durch die Spule erzeugbaren Magnetfeld verläuft. In unbestromtem Zustand der Spule 11 ist der Anker 12b in einer vom Polkern 12a entfernt liegenden Ausgangsposition angeordnet. FIG. 1 shows a magnetic circuit 10 in which a coil 11 is disposed about a pole core 12A and about an armature 12B movable along a longitudinal axis. For guiding a magnetic field that can be generated by the coil 11, a yoke 13 is provided, which connects the magnetic poles of the coil. In an armature-side part of the yoke 13, a permanent magnet 14 is arranged, which is aligned such that the magnetic field of the permanent magnet 14 extends in the same direction to the magnetic field generated by the coil. In a de-energized state the coil 11, the armature 12 b is arranged in a remote from the pole core 12 a starting position.

Zur Steuerung der Magnetkraft des Permanentmagneten 14 ist ein Kurzschlusskreis 20 für das Magnetfeld des Permanentmagneten 14 vorgesehen, der durch den Anker 12b in unbestromten Zustand der Spule geschlossen ist. Da Magnetfeldlinien stets den Weg des geringsten magnetischen Widerstandes wählen wird der Großteil des durch den Permanentmagneten 14 erzeugten Magnetfelds über den Kurzschlusskreis 20 gelenkt, so dass nur eine geringe Kraftkomponente in Richtung des Polkerns 12a auftritt.For controlling the magnetic force of the permanent magnet 14, a short circuit 20 for the magnetic field of the permanent magnet 14 is provided, which is closed by the armature 12b in the de-energized state of the coil. Since magnetic field lines always choose the path of the lowest magnetic resistance, the majority of the magnetic field generated by the permanent magnet 14 is directed via the short circuit 20, so that only a small force component in the direction of the pole core 12 a occurs.

Figur 2 zeigt den magnetischen Kreis aus Figur 1 mit bestromter Spule. FIG. 2 shows the magnetic circuit FIG. 1 with energized coil.

Der Anker 12b ist derart ausgestaltet, dass er eine Stufe 121 aufweist, die derart angeordnet ist, dass sie in bestromten Zustand der Spule 11 einen Luftspalt 22 in dem Kurzschlusskreis erzeugt und damit die Magnetfeldlinien des Permanentmagneten 14 aus dem Kurzschlusskreis 20 in den magnetischen Kreis 10 mit der Spule 11 umleitet. Es ist damit möglich durch eine einfache Freistellung in der Kontur des Ankers 12b die Magnetfeldlinien in den magnetischen Kreis 10 umzuleiten.The armature 12 b is designed such that it has a stage 121 which is arranged such that it generates an air gap 22 in the short circuit when the coil 11 is energized and thus the magnetic field lines of the permanent magnet 14 from the short circuit 20 in the magnetic circuit 10th with the coil 11 redirects. It is thus possible by a simple exemption in the contour of the armature 12 b to redirect the magnetic field lines in the magnetic circuit 10.

Ein Übergang zwischen dem Polkern 12a und dem Anker 12b ist außerdem mit einem Steuerkonus 123 versehen, der zur Einstellung einer stetigen Steuerkennlinie des magnetischen Kreises 10 dient.A transition between the pole core 12 a and the armature 12 b is also provided with a control cone 123 which serves to set a continuous control characteristic of the magnetic circuit 10.

In Figur 3 ist der magnetische Kreis 10 in einem Hubmagneten, wie er beispielsweise in Auslösemagneten zum Einsatz kommt, dargestellt. Der Polkern 12a und der Anker 12b sind in dieser Ausführungsform an einem Stößel 18 angeordnet, der mit dem Anker feststehend verbunden ist. Zwischen dem Polkern 12a und dem Anker 12b ist des weiteren eine Rückstellfeder 17 angeordnet, die den Anker 12a bei unbestromter Spule in die Ausgangsposition mit geschlossenem Kurzschlusskreis 20 rückführt. Die Spule 11 ist konzentrisch und umfänglich zu dem Polkern 12a und dem Anker 12b angeordnet und sitzt auf einem Spulenträger 111 aus Kunststoff. Der Permanentmagnet 14 ist ebenfalls oberseitig und unterseitig von Kunststoff umgeben und ist unterhalb der Spule 11 zwischen dem Joch 13 und einer Leitplatte 15 zur Führung der Magnetfeldlinien angeordnet. Der Kurzschlusskreis 20 im unteren Teil der Figur 3 ist wie auch schon in den Figuren 1 und 2 dargestellt durch die Kontur des Ankers schließbar und öffenbar wodurch ein starkes Magnetfeld des Permanentmagneten 14 durch eine relativ schwach dimensionierte Spule 11 steuerbar ist.In FIG. 3 is the magnetic circuit 10 in a lifting magnet, as used for example in tripping magnets used. The pole core 12a and the armature 12b are arranged in this embodiment on a plunger 18 which is fixedly connected to the armature. Between the pole core 12a and the armature 12b there is further arranged a return spring 17, which returns the armature 12a to the starting position with the short circuit 20 closed when the coil is not energized. The Coil 11 is arranged concentrically and circumferentially to the pole core 12a and the armature 12b and is seated on a coil carrier 111 made of plastic. The permanent magnet 14 is also surrounded on the upper side and lower side by plastic and is arranged below the coil 11 between the yoke 13 and a guide plate 15 for guiding the magnetic field lines. The short circuit 20 in the lower part of FIG. 3 is like in the FIGS. 1 and 2 represented by the contour of the armature closable and openable whereby a strong magnetic field of the permanent magnet 14 by a relatively weakly dimensioned coil 11 is controllable.

Figur 4 zeigt eine Draufsicht auf einen Schnitt entlang der Linie A-A durch den Hubmagneten aus Figur 3. In dieser Schnittdarstellung ist besonders gut die Anordnung der Permanentmagneten 14 zwischen dem Joch 13 und der Leitplatte 15 zu erkennen. Die Permanentmagneten 14 sind stabförmig ausgebildet und liegen zueinander parallel. In Figur 4 ist des weiteren besonders gut der zentral angeordnete und zylindrisch ausgebildete Anker 12b mit dem konzentrisch angeordneten Stößel 18 zu erkennen. FIG. 4 shows a plan view of a section along the line AA through the lifting magnet FIG. 3 , In this sectional view, the arrangement of the permanent magnets 14 between the yoke 13 and the guide plate 15 can be seen particularly well. The permanent magnets 14 are rod-shaped and are parallel to each other. In FIG. 4 Furthermore, the centrally arranged and cylindrically shaped armature 12b with the concentrically arranged plunger 18 can be seen particularly well.

Bezugszeichenliste:

10
magnetischer Kreis
11
Spule
12a
Polkern
12b
Anker
13
Joch
14
Permanentmagnet
15
Leitplatte
17
Rückstellfeder
18
Stößel
20
Kurzschlusskreis
22
Luftspalt
111
Spulenträger
121
Stufe
123
Steuerkonus
LIST OF REFERENCE NUMBERS
10
magnetic circle
11
Kitchen sink
12a
pole core
12b
anchor
13
yoke
14
permanent magnet
15
baffle
17
Return spring
18
tappet
20
Short circuit
22
air gap
111
coil carrier
121
step
123
control cone

Claims (12)

Magnetischer Kreis (10) mit - wenigstens einer bestrombaren Spule (11), die an einem Polkern (12a) angeordnet ist, - wenigstens einem bewegbaren Anker (12b), - wenigstens einer Rückstellfeder (17), die den Anker (12b) in unbestromtem Zustand der Spule (11) rückstellt, - einem Joch (13) zur Führung eines Magnetfelds und - wenigstens ein Permanentmagnet (14), dadurch gekennzeichnet, dass der wenigstens eine Permanentmagnet (14) in den magnetischen Kreis (10) zuschaltbar angeordnet ist.Magnetic circuit (10) with - At least one energizable coil (11) which is arranged on a pole core (12 a), at least one movable armature (12b), - At least one return spring (17) which resets the armature (12b) in the de-energized state of the coil (11), - A yoke (13) for guiding a magnetic field and at least one permanent magnet (14), characterized in that the at least one permanent magnet (14) in the magnetic circuit (10) is arranged switchable. Magnetischer Kreis (10) nach Anspruch 1,
dadurch gekennzeichnet, dass der wenigstens eine Permanentmagnet (14) bei unbestromter Spule (11) in einem magnetischen Kurzschlusskreis (20) angeordnet ist.Magnetic circuit (10) according to claim 1,
characterized in that the at least one permanent magnet (14) is arranged in a magnetic short circuit (20) when the coil (11) is not energized. Magnetischer Kreis (10) nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass wenigstens eine Rückstellfeder (17), die den Anker (12b) in unbestromtem Zustand der Spule (11) rückstellt vorgesehen ist.Magnetic circuit (10) according to claim 1 or 2,
characterized in that at least one return spring (17) which restores the armature (12b) in the de-energized state of the coil (11) is provided. Magnetischer Kreis (10) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Kurzschlusskreis (20) durch Bestromung der Spule (11) unterbrechbar ausgebildet ist.Magnetic circuit (10) according to one of the preceding claims,
characterized in that the short circuit (20) is formed interruptible by energizing the coil (11). Magnetischer Kreis (10) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Anker (12b) konturiert ausgebildet ist.Magnetic circuit (10) according to one of the preceding claims,
characterized in that the armature (12b) is formed contoured. Magnetischer Kreis (10) nach Anspruch 5,
dadurch gekennzeichnet, dass der Anker (12b) eine Stufe (121) aufweist.Magnetic circuit (10) according to claim 5,
characterized in that the armature (12b) has a step (121). Magnetischer Kreis (10) nach Anspruch 5 oder 6,
dadurch gekennzeichnet, dass der Polkern (12a) und der Anker (12b) einen Steuerkonus (123) aufweisen.Magnetic circuit (10) according to Claim 5 or 6, characterized
characterized in that the pole core (12a) and the armature (12b) have a control cone (123). Magnetischer Kreis (10) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der wenigstens eine Permanentmagnet (14) als Stabmagnet ( ausgebildet ist.Magnetic circuit (10) according to one of the preceding claims,
characterized in that the at least one permanent magnet (14) as a bar magnet (is formed. Magnetischer Kreis (10) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass für den magnetischen Kreis (10) und den Kurzschlusskreis (20) ein gemeinsames Joch (13) vorgesehen ist.Magnetic circuit (10) according to one of the preceding claims,
characterized in that a common yoke (13) is provided for the magnetic circuit (10) and the short circuit (20). Magnetischer Kreis (10) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Spule (11) auf einem Spulenträger (111) aus Kunststoff sitzt.Magnetic circuit (10) according to one of the preceding claims,
characterized in that the coil (11) sits on a coil carrier (111) made of plastic. Magnetischer Kreis (10) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Permanentmagnet (14) oberseitig und unterseitig mit Kunststoff eingefasst ist.Magnetic circuit (10) according to one of the preceding claims,
characterized in that the permanent magnet (14) is enclosed on the upper side and underside with plastic. Hubmagnet mit einem magnetischen Kreis (10) nach einem der vorhergehenden Ansprüche.Solenoid with a magnetic circuit (10) according to one of the preceding claims.
EP20090007666 2008-06-13 2009-06-10 Magnetic circuit with activatable permanent magnet Active EP2133887B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810028125 DE102008028125B4 (en) 2008-06-13 2008-06-13 Magnetic circuit with switchable permanent magnet

Publications (2)

Publication Number Publication Date
EP2133887A1 true EP2133887A1 (en) 2009-12-16
EP2133887B1 EP2133887B1 (en) 2013-05-29

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Cited By (4)

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CN101834052A (en) * 2010-03-30 2010-09-15 浙江工业大学 Spring-free directly operated type high-speed switch electromagnet
RU2461904C2 (en) * 2010-07-13 2012-09-20 Российская Федерация, от имени которой выступает государственный заказчик - Государственная корпорация по атомной энергии "Росатом" Drive magnetic system
CN103430251A (en) * 2011-03-16 2013-12-04 Eto电磁有限责任公司 Electromagnetic actuator device
EP2306472A3 (en) * 2009-10-01 2014-06-18 Pierburg GmbH Actuator for a combustion engine

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DE102010025766B4 (en) * 2010-07-01 2012-07-12 Thomas Magnete Gmbh Bistable solenoid
DE102010032688B4 (en) * 2010-07-29 2012-11-29 Kendrion (Donaueschingen/Engelswies) GmbH Electromagnet with permanent magnet

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EP2306472A3 (en) * 2009-10-01 2014-06-18 Pierburg GmbH Actuator for a combustion engine
CN101834052A (en) * 2010-03-30 2010-09-15 浙江工业大学 Spring-free directly operated type high-speed switch electromagnet
RU2461904C2 (en) * 2010-07-13 2012-09-20 Российская Федерация, от имени которой выступает государственный заказчик - Государственная корпорация по атомной энергии "Росатом" Drive magnetic system
CN103430251A (en) * 2011-03-16 2013-12-04 Eto电磁有限责任公司 Electromagnetic actuator device
CN103430251B (en) * 2011-03-16 2017-02-08 Eto电磁有限责任公司 Electromagnetic actuator device

Also Published As

Publication number Publication date
DE102008028125B4 (en) 2012-09-13
DE102008028125A1 (en) 2009-12-17
EP2133887B1 (en) 2013-05-29

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