EP0051231B1 - Electromagnetic holding or release device - Google Patents

Electromagnetic holding or release device Download PDF

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Publication number
EP0051231B1
EP0051231B1 EP19810108858 EP81108858A EP0051231B1 EP 0051231 B1 EP0051231 B1 EP 0051231B1 EP 19810108858 EP19810108858 EP 19810108858 EP 81108858 A EP81108858 A EP 81108858A EP 0051231 B1 EP0051231 B1 EP 0051231B1
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EP
European Patent Office
Prior art keywords
yoke
flux
permanent magnets
magnet
holding
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EP19810108858
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German (de)
French (fr)
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EP0051231A1 (en
Inventor
Gottfried Prof. Ing. Dr. Phil. Biegelmeier
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BBC Brown Boveri AG Germany
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Brown Boveri und Cie AG Germany
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements

Definitions

  • the invention describes a holding magnet release of high sensitivity, with a yoke body made of two parallel, ferromagnetic sheets, spaced apart by non-ferromagnetic material or air, with at least one window for at least one field winding, in which the field flux closes without a gap and the strong one Has a reduction in the cross section for the excitation flux at the point at which the trigger armature rests, and with a permanent magnet arrangement bridging the yoke plates for generating the holding flux of the trigger which is adjustable in height.
  • Holding magnet releases are known in the art, such as, for example, the blocking magnet release according to DE-C-911 755 and DE-C-949 502, the holding magnet release with short intrinsic time according to AT-B-197 895 and the holding magnet release with multi-layer yoke according to AT-B-242 777.
  • AT-B-278 954 also describes a release which has an iron-closed, air-gap-free, magnetic excitation circuit and has a simple construction.
  • the tripping armature and the permanent magnet are arranged side by side on the narrow side of a double yoke.
  • the double yoke consists of two yoke sheets made of highly permeable material, which are spaced by a layer of non-ferromagnetic material or air.
  • the setting is very sensitive to lateral displacements of the permanent magnets.
  • the trigger sensitivity of the permanent magnet release is set by turning the permanent magnet. It is advantageous if the induction in the armature air gap depends as evenly as possible on the angle of rotation of the permanent magnet. In the known arrangement, however, the change in the permanent flow with respect to the angle of rotation is relatively large, so that the setting accuracy is relatively low. This is due to the fact that the permanent magnet is arranged on the end face of the yoke and is only partially covered by the faces of the two yoke sheets.
  • AT-B-337 811 represents an improvement. It describes a holding magnet release in which the permanent magnet is fully covered by the yoke plates.
  • the yoke sheets are L-shaped, so that two pole shoes are formed, on which the permanent magnet is seated and are thus completely covered by them. In this way, the yoke assumes the shape of a T when assembled.
  • the permanent magnet is no longer arranged on the end face of the yoke, on which the tripping armature also rests, but is placed on the surface formed by the crossbar of the T-shaped double yoke, which thus has the function of pole pieces.
  • a bearing plate made of non-ferromagnetic material which has an opening adapted to the shape of the permanent magnet, into which the permanent magnet is rotatably inserted and which determines its position.
  • the object of the invention is therefore to create a holding magnet release of the type mentioned, the setting of which can be changed as precisely as possible within a narrow tolerance range.
  • the permanent magnet arrangement consists of at least two separate permanent magnets, of which a first magnet providing a base flux of a certain height is fixed with respect to the yoke plates and a second magnet is arranged so that it can move with respect to the two yoke plates provides a flow component which is adjustable in height and which optionally strengthens or weakens the basic flow.
  • the trigger can be reduced in size in that the permanent magnets are distributed in a rotatable, displaceable or fixed arrangement on the two narrow sides of the yoke body with respect to the excitation winding and with respect to the armature.
  • the trigger can be further reduced according to the invention in that the permanent magnets are distributed in a rotatable, displaceable or fixed arrangement on a narrow side of the yoke body and on a further window in the yoke body.
  • a magnet is fixed in its position and provides a constant permanent flux and thus a constant holding force for the release armature.
  • This basic flow is determined by the design of the trigger and the manufacturing requirements.
  • the second, usually smaller magnet is rotatably arranged and provides the permanent control flow, by means of which the required holding force and thus the correct triggering range can be adjusted additively or subtractively to the basic flow.
  • the yoke plates Due to the high control accuracy, the yoke plates only need to be equipped with small pole pieces, or these can be omitted at all. This makes it possible to build the trigger in a particularly space-saving manner.
  • a permanent magnet preferably a cylindrical magnet
  • the second permanent magnet preferably in the form of a prism (magnetic strip)
  • the second permanent magnet can be arranged fixedly or rotatably on another narrow side of the yoke body , for example opposite the anchor.
  • Fig. 1 which shows a graphical representation of the dependence of the permanent flux on the twist angle
  • 1 is the curve which shows the permanent flux for two magnets
  • 2 the curve which shows the permanent flux for one magnet.
  • 45R is the control flow, i.e. the flow that can be influenced by adjustment
  • PB is the base flow.
  • the total flow in the yoke body is now 60% of the initial value.
  • the control accuracy therefore has a value of around 0.02% per degree of twist angle. If you would only work with a permanent magnet according to AT-B-278 954, the permanent flux changes by 100% at an angle of rotation of 90 °. The control accuracy would then only have a value of around 1% per degree.
  • the two figures show a holding magnet release in two views. It consists of two permanent magnets 1a and 1b, an excitation winding 2 (there may of course also be more excitation windings) for generating the excitation flux, a tripping armature 3, and one with windows 2a for the excitation winding, consisting of two ferromagnetic ones running parallel to each other through one layer 6 made of non-ferromagnetic material or air-spaced sheets 4 and 5 yoke body, in which the excitation flow closes without air gap and which has a strong cross-sectional reduction for the excitation flow at the point at which the trigger armature 3 rests. This area is designated by the reference number 5a.
  • the armature and the permanent magnets bridge the yoke plates 4 and 5 and the armature is under the tensile force of a tension spring 7.
  • the two permanent magnets 1 and 1b are arranged on the narrow side of the yoke body opposite the excitation winding 2, a permanent magnet 1a fixing in position and the other 1b is rotatably arranged to regulate the permanent flow.
  • the rotatable permanent magnet 1b is arranged on the narrow side of the yoke body opposite the excitation winding 2, whereas the permanent magnet 1a fixed in its position is on the narrow side of the yoke body opposite the armature 3.
  • FIG. 5 shows a view of the trigger according to FIG. 4 in the direction of arrow A
  • FIG. 6 shows the view of the trigger according to FIG. 4 in the direction of arrow B.
  • FIG. 7 and 8 show an embodiment of the invention in which a permanent magnet is arranged in a further window 12 of the yoke body.
  • the position of the permanent magnet 1a is fixed in the further window 12, whereas the permanent magnet 1b is rotatably arranged on a narrow side of the yoke body 4, 5 and 6.
  • FIGS. 9 and 10 show a yoke body in which, for better stabilization of the magnets, the air gap 6 is widened in the region 14 by angling the yoke plates 4 and 5.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Description

Die Erfindung beschreibt einen Haltemagnetauslöser hoher Empfindlichkeit, mit einem aus zwei parallel zueinander verlaufenden, ferromagnetischen, durch nicht ferromagnetisches Material beziehungsweise Luft distanzierten Blechen aufgebauten, mit wenigstens einem Fenster für wenigstens eine Erregerwicklung versehenen Jochkörper, in dem sich der Erregerfluß luftspaltlos schließt und der eine starke Herabsetzung des Querschnittes für den Erregerfluß an jener Stelle aufweist, an der der Auslöseanker aufliegt, sowie mit einer die Jochbleche überbrückenden Permanentmagnetanordnung zur Erzeugung des in seiner Höhe einstellbaren Halteflusses des Auslösers.The invention describes a holding magnet release of high sensitivity, with a yoke body made of two parallel, ferromagnetic sheets, spaced apart by non-ferromagnetic material or air, with at least one window for at least one field winding, in which the field flux closes without a gap and the strong one Has a reduction in the cross section for the excitation flux at the point at which the trigger armature rests, and with a permanent magnet arrangement bridging the yoke plates for generating the holding flux of the trigger which is adjustable in height.

Haltemagnetauslöser sind in der Technik bekannt, wie zum Beispiel der Sperrmagnetauslöser nach der DE-C-911 755 und der DE-C-949 502, der Haltmagnetauslöser mit kleiner Eigenzeit gemäß der AT-B-197 895 und der Haltemagnetauslöser mit mehrschichtigem Joch gemäß der AT-B-242 777. Auch die AT-B-278 954 beschreibt einen Auslöser, der einen eisengeschlossenen, luftspaltlosen, magnetischen Erregerkreis besitzt und einen einfachen Aufbau hat. Der Auslöseanker und der Permanentmagnet sind nebeneinander auf der Schmalseite eines Doppeljoches angeordnet. Das Doppeljoch besteht aus zwei Jochblechen aus hochpermeablem Material, die durch eine Schicht aus nicht ferromagnetischem Material oder Luft distanziert sind. Dadurch jedoch, daß nur ein Permanentmagnet auf der Schmalseite des Joches angeordnet ist, ist die Einstellung gegen seitliche Verschiebungen der Permanentmagneten sehr empfindlich. Die Einstellung der Auslöseempfindlichkeit des Permanentmagnetauslösers erfolgt durch Verdrehen des Permanentmagneten. Es ist vorteilhaft, wenn die Induktion im Ankerluftspalt möglichst gleichmäßig vom Verdrehungswinkel des Permanentmagneten abhängt. Bei der bekannten Anordnung ist jedoch die Veränderung des Permanentflusses bezogen auf den Verdrehungswinkel relativ groß, so daß die Einstellgenauigkeit relativ gering ist. Dies ist darauf zurückzuführen, daß der Permanentmagnet auf der Stirnfläche des Joches angeordnet ist und nur zum Teil von den Flächen der beiden Jochbleche bedeckt wird.Holding magnet releases are known in the art, such as, for example, the blocking magnet release according to DE-C-911 755 and DE-C-949 502, the holding magnet release with short intrinsic time according to AT-B-197 895 and the holding magnet release with multi-layer yoke according to AT-B-242 777. AT-B-278 954 also describes a release which has an iron-closed, air-gap-free, magnetic excitation circuit and has a simple construction. The tripping armature and the permanent magnet are arranged side by side on the narrow side of a double yoke. The double yoke consists of two yoke sheets made of highly permeable material, which are spaced by a layer of non-ferromagnetic material or air. However, because only one permanent magnet is arranged on the narrow side of the yoke, the setting is very sensitive to lateral displacements of the permanent magnets. The trigger sensitivity of the permanent magnet release is set by turning the permanent magnet. It is advantageous if the induction in the armature air gap depends as evenly as possible on the angle of rotation of the permanent magnet. In the known arrangement, however, the change in the permanent flow with respect to the angle of rotation is relatively large, so that the setting accuracy is relatively low. This is due to the fact that the permanent magnet is arranged on the end face of the yoke and is only partially covered by the faces of the two yoke sheets.

Eine Verbesserung stellt die in der AT-B-337 811 beschriebene Lösung dar. Darin wird ein Haltemagnetauslöser beschrieben, bei dem der Permanentmagnet voll durch die Jochbleche bedeckt wird. Um dies zu erreichen, werden die Jochbleche L-förmig ausgebildet, so daß sich zwei Polschuhe bilden, auf denen der Permanentmagnet sitzt und so von ihnen voll überdeckt wird. Auf diese Weise nimmt das Joch im zusammengebauten Zustand die Form eines T an. Der Permanentmagnet wird nicht mehr an der Stirnfläche des Joches angeordnet, an der auch der Auslöseanker aufliegt, sondern wird auf die durch den Querbalken des T-förmigen Doppeljoches gebildete Fläche aufgesetzt, die damit die Funktion von Polschuhen erhält. Um den Permanentmagneten in seine Lage zu positionieren und während der Verdrehung zu führen, wird ein Lagerblech aus nicht ferromagnetischem Material vorgesehen, das eine der Form des Permanentmagneten angepaßte Öffnung besitzt, in die der Permanentmagnet verdrehbar eingesetzt ist, und die seine Lage bestimmt.The solution described in AT-B-337 811 represents an improvement. It describes a holding magnet release in which the permanent magnet is fully covered by the yoke plates. In order to achieve this, the yoke sheets are L-shaped, so that two pole shoes are formed, on which the permanent magnet is seated and are thus completely covered by them. In this way, the yoke assumes the shape of a T when assembled. The permanent magnet is no longer arranged on the end face of the yoke, on which the tripping armature also rests, but is placed on the surface formed by the crossbar of the T-shaped double yoke, which thus has the function of pole pieces. In order to position the permanent magnet in its position and to guide it during the rotation, a bearing plate made of non-ferromagnetic material is provided which has an opening adapted to the shape of the permanent magnet, into which the permanent magnet is rotatably inserted and which determines its position.

Bei dem in der AT-B-337 811 beschriebenen Haltemagnetauslöser ist die Einstellbarkeit durch Verdrehen des Permanentmagneten nur ungenau. Dies rührt daher, daß bei einer Verdrehung des Permanentmagneten um 90° der Permanentfluß eine Änderung von seinem Maximalwert bis auf Null erfährt. Für die Einstellung eines Auslösers würde es aber genügen, den Fluß in einem relativ engen Toleranzbereich, aber dafür möglichst genau, verändern zu können.In the case of the holding magnet release described in AT-B-337 811, the adjustability by turning the permanent magnet is only imprecise. This is because when the permanent magnet is rotated through 90 °, the permanent flux changes from its maximum value to zero. To set a trigger, it would be sufficient to be able to change the flow within a relatively narrow tolerance range, but as precisely as possible.

Aufgabe der Erfindung ist es daher, einen Haltemagnetauslöser der eingangs genannten Art zu schaffen, dessen Einstellung in einem engen Toleranzbereich möglichst genau verändert werden kann.The object of the invention is therefore to create a holding magnet release of the type mentioned, the setting of which can be changed as precisely as possible within a narrow tolerance range.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Permanentmagnetanordnung aus mindestens zwei getrennten Permanentmagneten besteht, von denen ein erster einen Basisfluß bestimmter Höhe liefernder Magnet in bezug auf die Jochbleche fest und ein zweiter Magnet in bezug auf die beiden Jochbleche derart bewegbar angeordnet ist, daß er eine in ihrer Höhe einstellbare, den Basisfluß wahlweise verstärkende oder schwächende Flußkomponente liefert.This object is achieved in that the permanent magnet arrangement consists of at least two separate permanent magnets, of which a first magnet providing a base flux of a certain height is fixed with respect to the yoke plates and a second magnet is arranged so that it can move with respect to the two yoke plates provides a flow component which is adjustable in height and which optionally strengthens or weakens the basic flow.

Eine Verkleinerung des Auslösers kann dadurch erzielt werden, daß die Permanentmagneten in drehbarer, verschiebbarer oder fester Anordnung auf die beiden Schmalseiten des Jochkörpers gegenüber der Erregerwicklung und gegenüber dem Anker aufgeteilt sind.The trigger can be reduced in size in that the permanent magnets are distributed in a rotatable, displaceable or fixed arrangement on the two narrow sides of the yoke body with respect to the excitation winding and with respect to the armature.

Darüber hinaus kann der Auslöser erfindungsgemäß dadurch weiter verkleinert werden, daß die Permanentmagneten in drehbarer, verschiebbarer oder fester Anordnung auf eine Schmalseite des Jochkörpers und auf ein weiteres Fenster im Jochkörper aufgeteilt sind.In addition, the trigger can be further reduced according to the invention in that the permanent magnets are distributed in a rotatable, displaceable or fixed arrangement on a narrow side of the yoke body and on a further window in the yoke body.

Damit wird nicht ein Magnet, sondern ein Doppelmagnetsystem für die Einstellung des Auslösers verwendet. Ein Magnet ist in seiner Lage fixiert und liefert einen konstanten Permanentfluß und damit eine konstante Haltekraft für den Auslöseanker. Dieser Basisfluß wird durch die Konstruktion des Auslösers und die Fertigungserfordernisse bestimmt und festgelegt. Der zweite, normalerweise kleinere Magnet ist verdrehbar angeordnet und liefert den permanenten Regelfluß, durch den additiv oder subtraktiv zum Basisfluß die erforderliche Haltekraft und damit der vorschriftsmäßige Auslösebereich eingestellt werden kann.This means that not a magnet, but a double magnet system is used to set the trigger. A magnet is fixed in its position and provides a constant permanent flux and thus a constant holding force for the release armature. This basic flow is determined by the design of the trigger and the manufacturing requirements. The second, usually smaller magnet is rotatably arranged and provides the permanent control flow, by means of which the required holding force and thus the correct triggering range can be adjusted additively or subtractively to the basic flow.

Damit kann eine wesentlich größere Genauigkeit der Einstellung erreicht werden, als bei den bisher bekannten Lösungen, beispielsweise eine fünfmal so hohe Regelgenauigkeit. Durch eine entsprechende Wahl des Verhältnisses von Basisfluß zu Regelfluß kann man eine beliebige Regelgenauigkeit erreichen (vergleiche auch Fig. 1).This allows a much greater accuracy of the setting to be achieved than with previously known solutions, for example a control accuracy five times as high. An appropriate control accuracy can be achieved by a corresponding choice of the ratio of the base flow to the control flow (see also FIG. 1).

Infolge der hohen Regelgenauigkeit brauchen die Jochbleche nur mit kleinen Polschuhen ausgestattet werden, oder diese können überhaupt entfallen. Dadurch ist es möglich, den Auslöser besonders raumsparend zu bauen.Due to the high control accuracy, the yoke plates only need to be equipped with small pole pieces, or these can be omitted at all. This makes it possible to build the trigger in a particularly space-saving manner.

Es ist auch vorteilhaft, einen Permanentmagneten, vorzugsweise einen Zylindermagneten, drehbar oder fix auf einer Schmalseite des Jochkörpers, zum Beispiel gegenüber der Erregerwicklung anzuordnen, während der zweite Permanentmagnet, vorzugsweise als Prisma (Magnetblechstreifen) ausgebildet, fix oder drehbar auf einer anderen Schmalseite des Jochkörpers, zum Beispiel gegenüber dem Anker, befestigt wird.It is also advantageous to arrange a permanent magnet, preferably a cylindrical magnet, rotatably or fixedly on a narrow side of the yoke body, for example opposite the excitation winding, while the second permanent magnet, preferably in the form of a prism (magnetic strip), can be arranged fixedly or rotatably on another narrow side of the yoke body , for example opposite the anchor.

Anhand der Zeichnung, in der erfindungsgemäße Ausführungsbeispiele dargestellt sind, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen näher erläutert und beschrieben werden. Es zeigt

  • Fig. 1 eine graphische Darstellung der Abhängigkeit des Permanentflusses vom Verdrehungswinkel zu dem Permanentfluß,
  • Fig. 2 und 3 zwei Ansichten eines ersten erfindungsgemäßen Auslösers,
  • Fig. 4 bis 10 weitere Ausgestaltungen der Erfindung.
The invention and further advantageous refinements and improvements are to be explained and described in more detail with reference to the drawing, in which exemplary embodiments according to the invention are shown. It shows
  • 1 is a graphical representation of the dependence of the permanent flow on the angle of twist to the permanent flow,
  • 2 and 3 two views of a first trigger according to the invention,
  • 4 to 10 further embodiments of the invention.

In der Fig. 1, die eine graphische Darstellung der Abhängigkeit des Permanentflusses vom Verdrehungswinkel zeigt, ist 1 die Kurve, die den Permanentfluß bei zwei Magneten und 2 die Kurve, die den Permanentfluß bei einem Magneten zeigt. Dabei ist 45R der Regelfluß, also derjenige Fluß, der durch Verstellung beeinflußt werden kann, wogegen PB der Basisfluß ist. Es sei beispielsweise ein Gesamtfluß von 100% mit einem Basisfluß von 80% und einem Regelfluß von 20% angenommen, wenn die beiden Magnete additiv in der Maximalstellung sind. Nach einer Verdrehung von 180° des drehbar angeordneten Permanentmagneten für den Regelfluß, also bei der maximal möglichen Subtraktion der beiden Permanentflüsse, beträgt dann der Gesamtfluß im Jochkörper nunmehr 60% des Ausgangswertes. Die Regelgenauigkeit hat also einen Wert von rund 0,02% pro Grad Verdrehungswinkel. Würde man etwa nach der AT-B-278 954 nur mit einem Permanentmagneten arbeiten, so ändert sich der Permanentfluß bei einem Verdrehungswinkel von 90° um 100%. Die Regelgenauigkeit hätte dann nurmehr einen Wert von rund 1% pro Grad.In Fig. 1, which shows a graphical representation of the dependence of the permanent flux on the twist angle, 1 is the curve which shows the permanent flux for two magnets and 2 the curve which shows the permanent flux for one magnet. 45R is the control flow, i.e. the flow that can be influenced by adjustment, whereas PB is the base flow. For example, assume a total flux of 100% with a base flux of 80% and a control flux of 20% when the two magnets are additively in the maximum position. After a rotation of 180 ° of the rotatably arranged permanent magnet for the control flow, ie with the maximum possible subtraction of the two permanent flows, the total flow in the yoke body is now 60% of the initial value. The control accuracy therefore has a value of around 0.02% per degree of twist angle. If you would only work with a permanent magnet according to AT-B-278 954, the permanent flux changes by 100% at an angle of rotation of 90 °. The control accuracy would then only have a value of around 1% per degree.

In den Fig. 2 und 3 ist ein erstes Ausführungsbeispiel der Erfindung dargestellt. Die beiden Figuren zeigen einen Haltemagnetauslöser in zwei Ansichten. Er besteht aus zwei Permanentmagneten 1a und 1b, einer Erregerwicklung 2 (es können selbstverständlich auch mehr Erregerwicklungen sein) zur Erzeugung des Erregerflusses, einem Auslöseanker 3, und einem mit Fenstern 2a für die Erregerwicklung versehenen, aus zwei parallel zueinander verlaufenden ferromagnetischen, durch eine Schicht 6 aus nicht ferromagnetischem Material beziehungsweise Luft distanzierten Blechen 4 und 5 aufgebauten Jochkörper, in welchem sich der Erregerfluß luftspaltlos schließt und der eine starke Querschnittsherabsetzung für den Erregerfluß an der Stelle aufweist, an der der Auslöseanker 3 aufliegt. Dieser Bereich ist mit der Bezugsziffer 5a bezeichnet. Dabei überbrücken der Anker und die Permanentmagnete die Jochbleche 4 und 5 und der Anker steht unter der Zugkraft einer Zugfeder 7. Die beiden Permanentmagnete 1 und 1b sind auf der der Erregerwicklung 2 gegenüberliegenden Schmalseite des Jochkörpers angeordnet, wobei ein Permanentmagnet 1a in seiner Lage fixiert und der andere 1b zur Regelung des Permanentflusses drehbar angeordnet ist.2 and 3, a first embodiment of the invention is shown. The two figures show a holding magnet release in two views. It consists of two permanent magnets 1a and 1b, an excitation winding 2 (there may of course also be more excitation windings) for generating the excitation flux, a tripping armature 3, and one with windows 2a for the excitation winding, consisting of two ferromagnetic ones running parallel to each other through one layer 6 made of non-ferromagnetic material or air-spaced sheets 4 and 5 yoke body, in which the excitation flow closes without air gap and which has a strong cross-sectional reduction for the excitation flow at the point at which the trigger armature 3 rests. This area is designated by the reference number 5a. The armature and the permanent magnets bridge the yoke plates 4 and 5 and the armature is under the tensile force of a tension spring 7. The two permanent magnets 1 and 1b are arranged on the narrow side of the yoke body opposite the excitation winding 2, a permanent magnet 1a fixing in position and the other 1b is rotatably arranged to regulate the permanent flow.

Die Fig. 4 bis 6 zeigen eine weitere Ausgestaltung der Erfindung. Dabei ist der drehbare Permanentmagnet 1b auf der der Erregerwicklung 2 gegenüberliegenden Schmalseite des Jochkörpers angeordnet, wogegen der in seiner Lage fixierte Permanentmagnet 1a auf der dem Anker 3 gegenüberliegenden Schmalseite des Jochkörpers ist.4 to 6 show a further embodiment of the invention. The rotatable permanent magnet 1b is arranged on the narrow side of the yoke body opposite the excitation winding 2, whereas the permanent magnet 1a fixed in its position is on the narrow side of the yoke body opposite the armature 3.

Die Fig. 5 zeigt eine Ansicht auf den Auslöser gemäß Fig.4 in Pfeilrichtung A und die Fig.6 zeigt die Ansicht auf den Auslöser gemäß Fig. 4 in Pfeilrichtung B.5 shows a view of the trigger according to FIG. 4 in the direction of arrow A and FIG. 6 shows the view of the trigger according to FIG. 4 in the direction of arrow B.

Die Fig. 7 und 8 zeigen eine Ausgestaltung der Erfindung, bei der ein Permanentmagnet in einem weiteren Fenster 12 des Jochkörpers angeordnet ist. Der Permanentmagnet 1a ist in dem weiteren Fenster 12 in seiner Lage fixiert, wogegen der Permanentmagnet 1b auf einer Schmalseite des Jochkörpers 4, 5 und 6 drehbar angeordnet ist.7 and 8 show an embodiment of the invention in which a permanent magnet is arranged in a further window 12 of the yoke body. The position of the permanent magnet 1a is fixed in the further window 12, whereas the permanent magnet 1b is rotatably arranged on a narrow side of the yoke body 4, 5 and 6.

Die Fig. 9 und 10 zeigen einen Jochkörper, bei dem zur besseren Stabilisierung der Magnete der Luftspalt 6 im Bereich 14 durch Abkröpfung der Jochbleche 4 und 5 verbreitert ist.FIGS. 9 and 10 show a yoke body in which, for better stabilization of the magnets, the air gap 6 is widened in the region 14 by angling the yoke plates 4 and 5.

Claims (4)

1. Holding magnet release of high sensitivity having a yoke body made of two ferromagnetic sheets (4, 5), extending in parallel with each other, and spaced by non-ferromagnetic material and/or air, respectively, and provided with, at least, one window (2a) for, at least, one exciting winding (2), wherein the excitation flux closes without air-gap and which comprises a considerable reduction of the cross-section for the excitation flux at that location, where the releasing armature (3) is supported, and having an arrangement of permanent magnets, bridging the yoke sheets (4, 5), for the generation of the holding flux, adjustable in its height, of the release, characterized in that the arrangement of permanent magnets consists of, at least, two separate permanent magnets (la, 1b), a first magnet (1a) of which, providing a basis flux of a determined height, is arranged stationarily in regard to the yoke sheets (4, 5), and a second magnet (1b) is arranged movably in regard to the two yoke sheets (4, 5) in such a manner that same provides a flux component, adjustable in its height and optionally increasing or decreasing the basis flux.
2. Holding magnet release according to claim 1, characterized in that the permanent magnets (1a or 1b) are distributed in rotatable, slidable, or stationary arrangement to the two narrow sides of the yoke body (4, 5, 6) oppositely to the exciting winding (2) and oppositely to the armature (3) (fig. 4, 5).
3. Holding magnet release according to claim 1, characterized in that the permanent magnets are distributed in rotatable, slidable, or stationary arrangement to one narrow side of the yoke body (4, 5, 6) and to a further window (12) in the yoke body.
4. Holding magnet release according to one of the preceding claims, that the permanent magnets (1 a, 1 b) are cylindrical or strip-shaped.
EP19810108858 1980-11-04 1981-10-24 Electromagnetic holding or release device Expired EP0051231B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT541780A AT372217B (en) 1980-11-04 1980-11-04 MAGNETIC RELEASE HIGH SENSITIVITY
AT5417/80 1980-11-04

Publications (2)

Publication Number Publication Date
EP0051231A1 EP0051231A1 (en) 1982-05-12
EP0051231B1 true EP0051231B1 (en) 1984-09-19

Family

ID=3575573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810108858 Expired EP0051231B1 (en) 1980-11-04 1981-10-24 Electromagnetic holding or release device

Country Status (3)

Country Link
EP (1) EP0051231B1 (en)
AT (1) AT372217B (en)
DE (1) DE3166197D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389018B (en) * 1987-11-09 1989-10-10 Felten & Guilleaume Ag Oester HOLDING MAGNETIC RELEASE
ATE259539T1 (en) * 1996-01-23 2004-02-15 Abb Schweiz Ag YOKE FOR A MAGNETIC RELEASE, PREFERABLY USABLE IN A RESIDUAL CURRENT PROTECTION SWITCH
DE19637077A1 (en) * 1996-09-12 1998-03-19 Maier & Cie C Permanent magnet for the magnetic circuit of a magnetic release that can preferably be used in a residual current circuit breaker
DE102013113456A1 (en) * 2013-12-04 2015-06-11 Eaton Electrical Ip Gmbh & Co. Kg Magnetic release for a switching device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1819419U (en) * 1958-03-20 1960-10-13 Siemens Ag LOCKING MAGNET.
AT242777B (en) * 1963-04-26 1965-10-11 Felten & Guilleaume Ag Oester Holding magnet release with at least three-part yoke body
AT278954B (en) * 1968-10-22 1970-02-25 Felten & Guilleaume Ag Oester Magnetic trigger
AT337811B (en) * 1975-12-02 1977-07-25 Felten & Guilleaume Ag Oester DOUBLE YOCKS HOLDING MAGNETIC RELEASE

Also Published As

Publication number Publication date
EP0051231A1 (en) 1982-05-12
DE3166197D1 (en) 1984-10-25
ATA541780A (en) 1983-01-15
AT372217B (en) 1983-09-12

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