EP0081604A1 - Pair of iron cores, and coil form bobbin for alternating current protection - Google Patents

Pair of iron cores, and coil form bobbin for alternating current protection Download PDF

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Publication number
EP0081604A1
EP0081604A1 EP81110410A EP81110410A EP0081604A1 EP 0081604 A1 EP0081604 A1 EP 0081604A1 EP 81110410 A EP81110410 A EP 81110410A EP 81110410 A EP81110410 A EP 81110410A EP 0081604 A1 EP0081604 A1 EP 0081604A1
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EP
European Patent Office
Prior art keywords
armature
core
pair
shaped
coil former
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
EP81110410A
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German (de)
French (fr)
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EP0081604B1 (en
Inventor
Alex Blum
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Priority to EP81110410A priority Critical patent/EP0081604B1/en
Priority to DE8181110410T priority patent/DE3175082D1/en
Priority to AT81110410T priority patent/ATE21296T1/en
Priority to US06/382,759 priority patent/US4491816A/en
Priority to JP57118325A priority patent/JPS58139640A/en
Publication of EP0081604A1 publication Critical patent/EP0081604A1/en
Application granted granted Critical
Publication of EP0081604B1 publication Critical patent/EP0081604B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion
    • 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
    • H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
    • H01F7/12—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements
    • H01F7/1205—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements having short-circuited conductors

Definitions

  • the invention relates to the electromechanical converter of an AC contactor with an E-shaped armature and a U- or E-shaped core, such as in the Swiss P.S. 552,278.
  • Two mutually influencing, undesirable properties of such transducers are the hum caused by the AC voltage in the attracted state, and the tendency of the movable and fixed magnetic core part to stick to one another as a result of remanence.
  • Two known measures to counteract these phenomena are, on the one hand, the use of short-circuit rings and, on the other hand, a shaping of the pole faces, which ensures that suitable air gaps remain in the area of contact between the core and armature, even when tightened.
  • the choice of the mutual contact points of the core and armature is quite critical with regard to the rifle properties of the contactor.
  • the contact surfaces were previously always provided on the outer legs of both the E- or C-shaped iron parts.
  • the short-circuit rings mentioned above which are made of an electrically highly conductive, non-ferromagnetic material, such as Hard copper or brass are then also attached in the area of the outer legs, in such a way that the ratio of the pole surfaces enclosed by the rings to the non-enclosed surfaces optimally suppresses the hum.
  • an air gap is usually provided in the tightened state in the region of the central leg or limbs, which sufficiently reduces the remanence force.
  • a bending vibration of the magnetic core parts lying on the front sides of their outer legs can occur, and the residual hum caused thereby can hardly be suppressed.
  • the facing pole faces on the outer legs and the surfaces delimiting the air gap must be ground with a relatively small tolerance, because not only must the gap be exactly correct, but the outer contact surfaces must also be exactly aligned with one another.
  • the manufacturing cost of such magnetic core parts is correspondingly high and the invention aims to provide an AC contactor with good operating properties which can be produced more economically.
  • this construction result in part from the fact that the contact surface of the two magnetic core parts, which is created when tightened, is relatively small and, above all, coherent.
  • this contact surface consists of two sub-surfaces which are spaced apart from one another and which have to be aligned very precisely in order to ensure that both magnetic core parts are in good contact with one another.
  • such an alignment either requires costly precise punching out of the Sheets, or post-processing, for example, by grinding the pole faces after assembling the sheet stack.
  • the greatest extent of the contact area of the construction according to the invention is relatively small, so that before the package is finally riveted together, all the sheets within this area can be aligned precisely enough to make regrinding occasionally unnecessary.
  • the air gap on the outer legs tolerates much larger tolerances because its cross-section is larger than in the case of non-inclined boundary surfaces.
  • Such an oblique course of the opposing surfaces on the outer legs has already been proposed, but of course only for an arrangement in which these surfaces are contact surfaces and not only limits of the air gap.
  • the relatively large extent of these surfaces requires a high degree of machining precision, and the difficulty in optimally attaching a short-circuit ring in the area of such inclined surfaces has also limited their use on DC devices.
  • the armature has a middle leg which is guided through the fixed coil body, which results in a better ratio of the length and width of the guide in comparison with the outer guide, and thus increases the functional reliability.
  • the figure shows two axial half-sections of an embodiment of the invention, on the left in the non-tightened state, on the right in the tightened state. It denotes 1 den movable armature, 2 the core, 3 the coil body, 4 the coil of the electromagnet.
  • the immobile coil body 3 made of insulating material also forms the guide for the middle leg of the E-shaped armature 1, which consists of a sheet metal stack held together by rivets 5.
  • the E-shaped core 2 is of the same structure.
  • the central web of the anchor in FIG. 7 lies on the somewhat shorter central web of the core.
  • a short-circuit ring 6 is inserted in the latter to suppress the hum. In order to simplify the assembly, this ring can also be held in its position by means of corresponding projections of the coil body, in a manner not shown.
  • the outer legs of the two magnetic core pieces are chamfered on their opposing front surfaces 8, 9 and dimensioned such that there is still an air gap 10 between them when the center webs in FIG. 7 are mutually abutting.
  • the beveling of the outer legs enables the stroke to be increased for a given attraction force and, on the other hand, has a certain centering effect when tightening, in particular as long as the area between the levels 11, 12 at the ends of the bevels and normal to these is the bobbin and the central web of the anchor in an area 13 where they are in mutual engagement.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

The transducer comprises an armature and a core. Both pieces are E-shaped, and their geometrical dimensions are chosen so that when their central legs come into mutual contact, air gaps still exist between both pairs of outer legs where these face each other. A coil bobbin is fixed to the core and forms a straight guide for the central leg of the armature. The frontal surfaces of the outer legs are chamfered so that the limiting surfaces of the air gaps are inclined with respect to the travel direction of the armature. In order to minimize the hum, a short-circuit ring is embedded into the central leg of the core.

Description

Die Erfindung betrifft den elektromechanischen Wandler eines Wechselstromschützes mit E-förmigem Anker und U- oder E-förmigem Kern, wie etwa in der Schweizer P.S. 552.278 beschrieben. Zwei sich gegenseitig beeinflussende, unerwünschte Eigenschaften solcher Wandler sind das durch die Wechselspannung bedingte Brummen in angezogenem Zustand, und die Tendenz von beweglichem und festem Magnetkernteiles infolge Remanenz aneinander kleben zu bleiben. Zwei bekannte Massnahmen, um diesen Erscheinungen entgegenzuwirken sind einerseits die Verwendung von Kurzschlussringen und andererseits eine Formgebung der Polflächen, welche dafür sorgt, dass auch in angezogenem Zustande geeignete Luftspalte im Bereiche der Berührungsstellen von Kern und Anker bestehen bleiben.The invention relates to the electromechanical converter of an AC contactor with an E-shaped armature and a U- or E-shaped core, such as in the Swiss P.S. 552,278. Two mutually influencing, undesirable properties of such transducers are the hum caused by the AC voltage in the attracted state, and the tendency of the movable and fixed magnetic core part to stick to one another as a result of remanence. Two known measures to counteract these phenomena are, on the one hand, the use of short-circuit rings and, on the other hand, a shaping of the pole faces, which ensures that suitable air gaps remain in the area of contact between the core and armature, even when tightened.

Wie beispielsweise aus der erwähnten P.S. hervorgeht ist die Wahl der gegenseitigen Auflagestellen von Kern und Anker in bezug auf die Brummeigenschaften des Schützes recht kritisch. Aus Stabilitätsgründen waren bisher die Auflageflächen stets an den äusseren Schenkeln beider der E- oder C-förmigen Eisenteile vorgesehen. Die oben erwähnten Kurzschlussringe, welche aus einem elektrisch gut leitenden, nicht-ferromagnetischen Material, wie etwa Hartkupfer oder Messing bestehen, sind dann ebenfalls im Bereich der äusseren Schenkel angebracht, und zwar so, dass das Verhältnis der von den Ringen umschlossenen Polflächen zu den nicht umschlossenen eine optimale Unterdrückung des Brummens bewirkt.As can be seen, for example, from the aforementioned PS, the choice of the mutual contact points of the core and armature is quite critical with regard to the rifle properties of the contactor. For reasons of stability, the contact surfaces were previously always provided on the outer legs of both the E- or C-shaped iron parts. The short-circuit rings mentioned above, which are made of an electrically highly conductive, non-ferromagnetic material, such as Hard copper or brass are then also attached in the area of the outer legs, in such a way that the ratio of the pole surfaces enclosed by the rings to the non-enclosed surfaces optimally suppresses the hum.

Um ein Kleben der Magnetkernteile aufeinander zu verhindern ist üblicherweise in angezogenem Zustand im Bereich des oder der Mittelschenkel ein Luftspalt vorgesehen, der die Remanenzkraft genügend herabsetzt. Dadurch kann aber eine Biegeschwingung der an den Frontseiten ihrer äusseren Schenkel aufeinanderliegenden Magnetkernteile auftreten, und das dadurch bewirkte Restbrummen ist kaum zu unterdrücken. Zudem müssen die aufeinander zu liegen kommenden Polflächen an den äusseren Schenkeln sowie die den Luftspalt begrenzenden Flächen mit relativ geringer Toleranz geschliffen werden, denn nicht nur muss der Spalt exakt genau stimmen , sondern es müssen auch die äusseren Auflageflächen gegenseitig genau fluchten. Der Herstellungsaufwand solcher Magnetkernteile ist entsprechend hoch und die Erfindung zielt darauf, einen wirtschaftlicher herstellbaren Wechselstromschütz mit guten Betriebseigenschaften zu schaffen.In order to prevent the magnetic core parts from sticking to one another, an air gap is usually provided in the tightened state in the region of the central leg or limbs, which sufficiently reduces the remanence force. As a result, however, a bending vibration of the magnetic core parts lying on the front sides of their outer legs can occur, and the residual hum caused thereby can hardly be suppressed. In addition, the facing pole faces on the outer legs and the surfaces delimiting the air gap must be ground with a relatively small tolerance, because not only must the gap be exactly correct, but the outer contact surfaces must also be exactly aligned with one another. The manufacturing cost of such magnetic core parts is correspondingly high and the invention aims to provide an AC contactor with good operating properties which can be produced more economically.

Erfindungsgemäss wird dies durch die im Anspruch 1 beschriebene Konstruktion erreicht.According to the invention this is achieved by the construction described in claim 1.

Die Vorteile dieser Konstruktion ergeben sich zum Teil daraus, dass die im angezogenen Zustand entstehende Berührungsfläche beider Magnetkernteile verhältnismässig klein und vor allem zusammenhängend ist. Bei den bekannten Ausführungen besteht diese Berührungsfläche nämlich aus zwei voneinander entfernten Teilflächen, die gegenseitig sehr genau ausgerichtet sein müssen, um ein gutes gegenseitiges Anliegen beider Magnetkernteile zu gewährleisten. Insbesondere bei dem durchwegs üblichen Aufbau der Magnetkernteile aus geschichteten Blechen verlangt ein solches Ausrichten entweder ein kostspielig genaues Ausstanzen der Bleche, oder eine Nachbearbeitung etwa durch Schleifen der Polflächen nach dem Zusammenfügen des Blechpaketes. Demgegenüber ist die grösste Ausdehnung der Berührungsfläche der erfindungsgemässen Konstruktion verhältnismässig klein, so dass vor dem endgültigen Zusammennieten des Paketes alle Bleche innerhalb dieser Fläche genau genug ausgerichtet werden können, um ein Nachschleifen fallweise überflüssig zu machen. Gleichzeitig verträgt der Luftspalt an den Aussenschenkeln wesentlich grössere Toleranzen, weil sein Querschnitt grösser als bei nicht schrägen Begrenzungsflächen ist. Solch ein schräger Verlauf der einander gegenüberliegenden Flächen an den äusseren Schenkeln ist zwar schon vorgeschlagen worden, aber selbstredend nur für Anordnung, bei welcher diese Flächen Berührungsflächen, und nicht nur Begrenzungen des Luftspaltes sind. Dann verlangt aber gerade die relativ grosse Ausdehnung dieser Flächen eine hohe Präzision der Bearbeitung, und die Schwierigkeit, einen Kurzschlussring optimal im Bereich solch schräger Flächen anzubringen hat zudem ihre Verwendung auf Gleichstromgeräte eingeschränkt.The advantages of this construction result in part from the fact that the contact surface of the two magnetic core parts, which is created when tightened, is relatively small and, above all, coherent. In the known designs, this contact surface consists of two sub-surfaces which are spaced apart from one another and which have to be aligned very precisely in order to ensure that both magnetic core parts are in good contact with one another. Particularly in the case of the consistently customary construction of the magnetic core parts from layered metal sheets, such an alignment either requires costly precise punching out of the Sheets, or post-processing, for example, by grinding the pole faces after assembling the sheet stack. In contrast, the greatest extent of the contact area of the construction according to the invention is relatively small, so that before the package is finally riveted together, all the sheets within this area can be aligned precisely enough to make regrinding occasionally unnecessary. At the same time, the air gap on the outer legs tolerates much larger tolerances because its cross-section is larger than in the case of non-inclined boundary surfaces. Such an oblique course of the opposing surfaces on the outer legs has already been proposed, but of course only for an arrangement in which these surfaces are contact surfaces and not only limits of the air gap. Then, however, the relatively large extent of these surfaces requires a high degree of machining precision, and the difficulty in optimally attaching a short-circuit ring in the area of such inclined surfaces has also limited their use on DC devices.

Schliesslich sind die Brummprobleme bei Abstützung in der Mitte und seitlichen Luftspalten weniger einschneidend.Finally, the humming problems with support in the middle and side air gaps are less severe.

In einer bevorzugten Ausführung besitzt der Anker einen Mittelschenkel, der durch den feststehenden Spulenkörper geführt wird, was im Vergleich mit der Aussenführung ein besseres Verhältnis von Länge und Breite der Führung ergibt, und somit die Funktionssicherheit erhöht.In a preferred embodiment, the armature has a middle leg which is guided through the fixed coil body, which results in a better ratio of the length and width of the guide in comparison with the outer guide, and thus increases the functional reliability.

Im folgenden soll die Erfindung anhand der einzigen Figur und der Beschreibung näher erläutert werden. Die Figur zeigt zwei achsiale Halbschnitte einer Ausführungsform der Erfindung, links im nicht angezogenen Zustand, rechts im angezogenen Zustand. Es bezeichnet 1 den beweglichen Anker, 2 den Kern, 3 den Spulenkörper, 4 die Spule des Elektromagneten. Der aus Isoliermaterial gefertigte unbewegliche Spulenkörper 3 bildet zugleich die Führung für den Mittelschenkel des E-förmigen, aus einem mittels Nieten 5 zusammengehaltenen Blechstapels bestehenden Anker 1. Der ebenfalls E-förmige Kern 2 ist gleich aufgebaut. In angezogenem Zustand liegt der Mittelsteg des Ankers in 7 auf dem etwas kürzeren Mittelsteg des Kernes auf. In letzterem ist zur Unterdrückung der Brummschwingungen ein Kurzschlussring 6 eingelassen. Zur Vereinfachung des Zusammenbaues kann dieser Ring auch - in nicht gezeigter Weise - durch entsprechende Vorsprünge des Spulenkörpers in seiner Lage festgehalten werden.The invention will be explained in more detail below with reference to the single figure and the description. The figure shows two axial half-sections of an embodiment of the invention, on the left in the non-tightened state, on the right in the tightened state. It denotes 1 den movable armature, 2 the core, 3 the coil body, 4 the coil of the electromagnet. The immobile coil body 3 made of insulating material also forms the guide for the middle leg of the E-shaped armature 1, which consists of a sheet metal stack held together by rivets 5. The E-shaped core 2 is of the same structure. In the tightened state, the central web of the anchor in FIG. 7 lies on the somewhat shorter central web of the core. A short-circuit ring 6 is inserted in the latter to suppress the hum. In order to simplify the assembly, this ring can also be held in its position by means of corresponding projections of the coil body, in a manner not shown.

Die Aussenschenkel beider Magnetkernstücke sind an ihren einander gegenüberliegenden Frontflächen 8,9 abgeschrägt und so dimensioniert, dass zwischen ihnen noch ein Luftspalt 10 besteht, wenn die Mittelstege in 7 gegenseitig im Anschlag stehen. Die Abschrägung der Aussenschenkel ermöglicht einerseits eine Vergrösserung des Hubes für eine gegebene Anziehungskraft und bewirkt andererseits eine gewisse zentrierende Wirkung beim Anziehen aus, insbesondere solange das Gebiet zwischen den an den Enden der Abschrägungen und normal zu diesen erhobenen Ebenen 11, 12 den Spulenkörper und den Mittelsteg des Ankers in einem Bereich 13 trifft, wo diese in gegenseitigem Eingriff stehen.The outer legs of the two magnetic core pieces are chamfered on their opposing front surfaces 8, 9 and dimensioned such that there is still an air gap 10 between them when the center webs in FIG. 7 are mutually abutting. On the one hand, the beveling of the outer legs enables the stroke to be increased for a given attraction force and, on the other hand, has a certain centering effect when tightening, in particular as long as the area between the levels 11, 12 at the ends of the bevels and normal to these is the bobbin and the central web of the anchor in an area 13 where they are in mutual engagement.

Claims (4)

l. Eisenkernpaar und Spulenkörper für ein Wechselstromschütz mit einem Kern und einem Anker, wobei mindestens eines dieser Stücke E-förmig ausgebildet ist, dadurch gekennzeichnet, dass der Mittelschenkel des E-förmigen Stückes in angezogenem Zustand auf dem Gegenstück auf- liegt, und dass mindestens der Mittelschenkel oder der dem Mittelschenkel des Gegenstückes gegenüberliegende Bereich eines der Stücke einen Kurzschlussring trägt, und dass in angezogenem Zustand zwischen den beiden Aussenschenkelpaaren je ein Luftspalt bestehen bleibt, dessen Begrenzungsflächen schräg zur Bewegungsrichtung des Ankers verlaufen.l. Iron core pair and coil former for an AC contactor with a core and an armature, at least one of these pieces being E-shaped, characterized in that the middle leg of the E-shaped piece lies on the counterpart in the tightened state, and that at least the middle leg or the area of one of the pieces opposite the center leg of the counterpart carries a short-circuit ring, and that in the tightened state an air gap remains between the two pairs of outer legs, the boundary surfaces of which extend obliquely to the direction of movement of the armature. 2. Eisenkernpaar und Spulenkörper nach Anspruch l, gekennzeichnet durch einen E-förmigen Kern und einen E-förmigen Anker.2. iron core and bobbin according to claim l, characterized by an E-shaped core and an E-shaped armature. 3. Eisenkernpaar und Spulenkörper nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Anker einen im Spulenkörper geführten Mittelschenkel aufweist.3. pair of iron cores and coil former according to one of the preceding claims, characterized in that the armature has a central leg guided in the coil former. 4. Eisenkernpaar und Spulenkörper nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Kurzschlussring durch den Spulenkörper gehaltert ist.4. iron core pair and coil former according to one of the preceding claims, characterized in that the short-circuit ring is held by the coil former.
EP81110410A 1981-12-14 1981-12-14 Pair of iron cores, and coil form bobbin for alternating current protection Expired EP0081604B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP81110410A EP0081604B1 (en) 1981-12-14 1981-12-14 Pair of iron cores, and coil form bobbin for alternating current protection
DE8181110410T DE3175082D1 (en) 1981-12-14 1981-12-14 Pair of iron cores, and coil form bobbin for alternating current protection
AT81110410T ATE21296T1 (en) 1981-12-14 1981-12-14 PAIR OF IRON CORE AND COIL FOR AC CONTACTOR.
US06/382,759 US4491816A (en) 1981-12-14 1982-05-27 Transducer for alternating current limiter
JP57118325A JPS58139640A (en) 1981-12-14 1982-07-07 Converter for ac current limiter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81110410A EP0081604B1 (en) 1981-12-14 1981-12-14 Pair of iron cores, and coil form bobbin for alternating current protection

Publications (2)

Publication Number Publication Date
EP0081604A1 true EP0081604A1 (en) 1983-06-22
EP0081604B1 EP0081604B1 (en) 1986-08-06

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EP81110410A Expired EP0081604B1 (en) 1981-12-14 1981-12-14 Pair of iron cores, and coil form bobbin for alternating current protection

Country Status (5)

Country Link
US (1) US4491816A (en)
EP (1) EP0081604B1 (en)
JP (1) JPS58139640A (en)
AT (1) ATE21296T1 (en)
DE (1) DE3175082D1 (en)

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EP0160121A1 (en) * 1984-03-31 1985-11-06 Square D Company (Deutschland) Gmbh Electromagnet for electrical switching devices, particularly for contactors
FR2568402A1 (en) * 1984-07-24 1986-01-31 Telemecanique Electrique ELECTRO-MAGNET WITH CONTINUOUS CURRENT, ESPECIALLY FOR ELECTRIC SWITCHING APPARATUS
GB2221349A (en) * 1986-03-24 1990-01-31 Lectron Products A solenoid assembly and fluid control valve
WO1993009648A1 (en) * 1991-09-18 1993-05-13 Pacific Scientific Company Improved outdoor lighting controls
WO2000060624A1 (en) * 1999-04-07 2000-10-12 Tyco Electronics Logistics Ag Magnet system for a relay
EP2197012A1 (en) * 2008-12-10 2010-06-16 General Electric Company Electromagnet for an electrical contactor

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US5010310A (en) * 1988-06-16 1991-04-23 General Signal Corporation Alternating current immunized relay and method of immunizing a relay to alternating current
US4981312A (en) * 1988-06-29 1991-01-01 Harrow Products, Inc. Electromagnetic shear lock
US5016929A (en) * 1989-06-13 1991-05-21 Harrow Products, Inc. Electromagnetic shear lock
US5010312A (en) * 1990-04-10 1991-04-23 Rostra Engineered Components Solenoid actuators
US5355108A (en) * 1992-10-05 1994-10-11 Aura Systems, Inc. Electromagnetically actuated compressor valve
US5352101A (en) * 1992-10-05 1994-10-04 Aura Systems, Inc. Electromagnetically actuated compressor valve
DE19922424C2 (en) * 1999-05-14 2003-04-30 Siemens Ag Electromagnetic actuator
DE10146899A1 (en) * 2001-09-24 2003-04-10 Abb Patent Gmbh Electromagnetic actuator, in particular electromagnetic drive for a switching device
US7053742B2 (en) * 2001-12-28 2006-05-30 Abb Technology Ag Electromagnetic actuator having a high initial force and improved latching
DE102004002528A1 (en) * 2004-01-12 2005-08-04 Siemens Ag Electromagnetic linear drive
US8678140B2 (en) * 2005-10-11 2014-03-25 Otis Elevator Company Electromagnet and elevator door coupler
US9240271B2 (en) 2011-09-30 2016-01-19 Intel Corporation Inductor that switches between coupled and decoupled states
WO2015172824A1 (en) * 2014-05-14 2015-11-19 Abb Technology Ltd Thomson coil based actuator
FR3145831A1 (en) * 2023-02-14 2024-08-16 Valeo Embrayages Linear electromagnetic actuator

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160121A1 (en) * 1984-03-31 1985-11-06 Square D Company (Deutschland) Gmbh Electromagnet for electrical switching devices, particularly for contactors
FR2568402A1 (en) * 1984-07-24 1986-01-31 Telemecanique Electrique ELECTRO-MAGNET WITH CONTINUOUS CURRENT, ESPECIALLY FOR ELECTRIC SWITCHING APPARATUS
EP0170562A1 (en) * 1984-07-24 1986-02-05 Telemecanique Direct-current electromagnet, in particular for an electric commutator device
GB2221349A (en) * 1986-03-24 1990-01-31 Lectron Products A solenoid assembly and fluid control valve
GB2221349B (en) * 1986-03-24 1990-07-04 Lectron Products A solenoid assembly and fluid control valve assembly including such solenoid assembly
WO1993009648A1 (en) * 1991-09-18 1993-05-13 Pacific Scientific Company Improved outdoor lighting controls
WO2000060624A1 (en) * 1999-04-07 2000-10-12 Tyco Electronics Logistics Ag Magnet system for a relay
US6674353B1 (en) 1999-04-07 2004-01-06 Tyco Electronics Logistics Ag Magnet system for a relay
EP2197012A1 (en) * 2008-12-10 2010-06-16 General Electric Company Electromagnet for an electrical contactor
US8212638B2 (en) 2008-12-10 2012-07-03 General Electric Company Electromagnet for an electrical contactor

Also Published As

Publication number Publication date
DE3175082D1 (en) 1986-09-11
JPS58139640A (en) 1983-08-19
US4491816A (en) 1985-01-01
ATE21296T1 (en) 1986-08-15
JPH0373976B2 (en) 1991-11-25
EP0081604B1 (en) 1986-08-06

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