DE102006035225A1 - Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement - Google Patents
Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement Download PDFInfo
- Publication number
- DE102006035225A1 DE102006035225A1 DE102006035225A DE102006035225A DE102006035225A1 DE 102006035225 A1 DE102006035225 A1 DE 102006035225A1 DE 102006035225 A DE102006035225 A DE 102006035225A DE 102006035225 A DE102006035225 A DE 102006035225A DE 102006035225 A1 DE102006035225 A1 DE 102006035225A1
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- DE
- Germany
- Prior art keywords
- signal
- voltage
- coil
- energized state
- actuator
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
- H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1844—Monitoring or fail-safe circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
- H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
Abstract
Description
Die vorliegende Erfindung betrifft eine elektromagnetische Stellvorrichtung nach dem Oberbegriff des Hauptanspruchs; eine derartige Vorrichtung ist aus der deutschen Patentanmeldung 102 40 774 der Anmelderin bekannt.The The present invention relates to an electromagnetic actuator according to the preamble of the main claim; Such a device is from the German patent application 102 40 774 of the Applicant known.
So ermöglicht es eine derartige Vorrichtung, in einfacher und wirksamer Weise eine insbesondere auch bistabil wirkende Stellvorrichtung zu schaffen, welche eine einfache Herstellbarkeit mit steuerungstechnischen und energetischen Vorteilen, insbesondere bewirkt durch die Permanentmagnetmittel, kombiniert.So allows it such a device, in a simple and effective manner to create a particular bistable acting adjusting device, which easy manufacturability with control engineering and energy Advantages, in particular caused by the permanent magnet means, combined.
Gerade im Zusammenhang mit einem Einsatz als bistabiles Stellglied stellt sich doch häufig das Problem, dass in einem unbestromten Zustand der Spuleneinrichtung (nämlich einem Zustand, bei welchem kein elektronisches Ansteuersignal an der Spuleneinrichtung anliegt) durch z. B. mechanische Einflüsse auf das Stellelement (d.h. typischerweise den Kolben) eine Verschiebung desselben innerhalb der Vorrichtung erfolgt, insoweit ein undefinierter Positionszustand erzeugt wird, wobei eine derartige Position normalerweise nur mit beachtlichem zusätzlichem Aufwand detektierbar – und dann ggf. korrigierbar ist. Insbesondere finden hierfür typischerweise mechanische Abtast- oder Sensorelemente Verwendung, welche dann ihrerseits wiederum zur Positionserfassung einer Kolbenstellung auswertbar sind. Dies ist jedoch aufwendig und lässt sich oftmals nicht mit den räumlichen bzw. geometrischen Anforderungen an einer Einbauposition verbinden.Just in the context of a use as a bistable actuator provides but often that Problem that in a de-energized state of the coil device (namely a state in which no electronic drive signal to the coil device is applied) by z. B. mechanical influences the actuator (i.e., typically the piston) is a displacement the same takes place within the device, as far as an undefined Position condition is generated, such a position normally only with considerable additional Effort detectable - and then correct if necessary. In particular, this typically find mechanical Scanning or sensor elements use, which in turn turn in turn can be evaluated for position detection of a piston position. This but is expensive and leaves often not with the spatial or geometric requirements to connect to a mounting position.
Aufgabe der vorliegenden Erfindung ist es daher, eine gattungsgemäße elektromagnetische Stellvorrichtung im Hinblick auf die einfache und zuverlässige Detektion einer Bewegung bzw. Positionsänderung des Stellelements im unbestromten Zustand der Vorrichtung weiterzubilden, wobei eine derar tige Bewegungs- bzw. Positionserfassung die Grundlage für weitergehende Steuerungsreaktionen sein kann.task The present invention is therefore a generic electromagnetic actuator in view of the simple and reliable detection of a movement or position change of the actuating element in the de-energized state of the device, a Derar term movement or position detection is the basis for more advanced Control reactions can be.
Die Aufgabe wird durch die Vorrichtung mit den Merkmalen des Hauptanspruchs gelöst; vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben.The The object is achieved by the device having the features of the main claim solved; advantageous developments of the invention are described in the subclaims.
So hat es sich im Rahmen der Erfindung als besonders günstig herausgestellt, dass die erfindungsgemäß realisierte Vorrichtung besonders einfach detektierbare Spannungssignale in der Spuleneinrichtung im unbestromten Zustand derselben induziert, sobald der Kolben, etwa durch externe mechanische Einschlüsse, aus einer aktuellen Position ausgelenkt wird. Erfindungsgemäß wird diese induzierte Spannung in dem (typischerweise fensterartigen) Zeitraum des unbestromten Zustandes erfasst, amplituden-/polaritätsmäßig und/oder im Hinblick auf einen (relativen) Zeitpunkt von Spannungsmaxima, Spannungsminima (oder Überschreiten des vorbestimmten, bevorzugt einstellbaren Schwellwerts) ausgewertet und weiterer, nachfolgender Verarbeitung zugeführt.So it has been found in the invention to be particularly favorable that realized according to the invention Device particularly easily detectable voltage signals in the coil device in the de-energized state of the same induces as soon as the piston, for example by external mechanical inclusions out a current position is deflected. According to the invention this induced stress in the (typically windowed) period the de-energized state detects amplitude / polarity and / or with regard to a (relative) time of maximum voltage, minimum voltage (or crossing the predetermined, preferably adjustable threshold value) evaluated and further, subsequently processed.
Auf diese Weise lässt sich durch vergleichsweise einfache elektronische Auswertung eines ohne zusätzliche Peripherie an der vorhandenen Vorrichtung erzeugten Spannungssignals in überraschend einfacher und zuverlässiger Weise die gestellte Aufgabe lösen, nämlich ein Bewegungs- und/oder Positionssignal des Kolbens zu erzeugen.On that way by comparatively simple electronic evaluation of a without additional Peripheral on the existing device generated voltage signal in a surprisingly simple way and more reliable Way solve the task, namely to generate a movement and / or position signal of the piston.
Im Rahmen der Erfindung hat es sich nämlich herausgestellt, dass das erfindungsgemäß detektierte Spannungssignal (bzw. dessen Signalform im Spannungs-/Zeitdiagramm) einerseits zwar durch die geometrischen Verhältnisse der Stellvorrichtung, anderseits jedoch insbesondere auch durch die Geschwindigkeit der Kolbenbewegung bedingt ist, so dass durch Auswertung eines solchen Signals, Idealerweise auch eines Signalverlaufs, genaue Aussagen über Bewegung und/oder Positionen eines in der Stellvorrichtung bewegten Kolbens möglich sind, vor allem durch Auswertung des Span nungssignals im Hinblick auf die erwähnten Extrem- bzw. Schwellwerte und deren (zeitliche) Position im Zeitfenster des unbestromten Zustandes.in the In fact, within the scope of the invention, it has been found that the inventively detected Voltage signal (or its waveform in the voltage / time diagram) on the one hand by the geometric conditions of the adjusting device, on the other hand but especially by the speed of the piston movement conditionally, so by evaluating such a signal, ideally also a signal curve, precise statements about movement and / or positions a moving in the actuator piston are possible, especially by Evaluation of the voltage signal with regard to the aforementioned extreme or threshold values and their (temporal) position in the time window of the powerless state.
Besonders geeignet ist es daher im Rahmen bevorzugter Weiterbildungen, die typischerweise ohnehin vorhandene Steuereinheit für die Ansteuerung der Spuleneinrichtung (und mithin das Erzeugen des bestromten Zustandes) um die erfindungsgemäßen Signaldetektionsmittel zu ergänzen; diese würden (ggf. etwas verzögert) nach einem Ausschaltzeitpunkt für das (Spulen-) Steuersignal aktiviert und rechtzeitig vor einem (Wieder-) Aktivieren des Steuersignals deaktiviert werden, so dass in dem sich so ergebenden Mess-Zeitfenster eine Bewegungs- und/oder Positionserfassung durch Detektion des Spannungssignals bzw. des Verlaufs desselben erfolgen kann.Especially It is therefore suitable in the context of preferred developments, the typically already existing control unit for the control of Coil device (and thus generating the energized state) to the signal detection means according to the invention to complete; these would (if necessary delayed a bit) after a switch-off time for activates the (coil) control signal and timely before a (re-) Activate the control signal to be deactivated, so that in the Resulting measurement time window motion and / or position detection by detecting the voltage signal or the course of the same can be done.
Dabei sind verschiedene Wege denkbar, in analoger Schaltungstechnik oder digital nach entsprechender AD-Wandlung, eine Extrem- oder Schwellwertbestimmung und/oder eine zeitliche Analyse des induzierten Spannungssignalsverlaufs vorzunehmen; die geeignete Umsetzung dürfte sich nach den Erfordernissen an Auflösung, Positionsgenauigkeit und möglichem Aufwand richten.there Are different ways conceivable, in analog circuit technology or digital after appropriate AD conversion, an extreme or threshold value determination and / or a temporal analysis of the induced voltage waveform pre; the appropriate implementation is expected to follow the requirements at resolution, Positional accuracy and possible Set up effort.
Die
vorliegende Erfindung setzt zudem auf der in der
Im Ergebnis lässt sich somit in pragmatischer und überraschend einfacher Weise das Problem einer Bewegung- und Positionserfassung bei aus einer definierten Position im unbestromtem Zustand bewegten Kolbeneinheit od.dgl. lösen, nämlich durch erfindungsgemäße Detektion und Auswertung des durch eine solche Bewegung in der (vorhandenen) Spuleneinrichtung induzierten Spannungssignals, wobei dessen charak teristische Werte, insbesondere Schwellen- oder Extremwerte, Aufschluss über eine aktuelle Kolbenposition geben.in the Result leaves thus becoming more pragmatic and surprising simply the problem of motion and position detection moved from a defined position in the de-energized state Piston unit or the like. to solve, namely by detection according to the invention and evaluation of the by such a movement in the (existing) coil means induced voltage signal, its characteristic values, in particular threshold or extreme values, information about a current Give piston position.
Weitere
Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus
der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand
der Zeichnungen; ergänzend
sollen die
Die
In
der in der Patentanmeldung 102 40 774 beschriebenen Weise ist die
so aufgebaute Anordnung bistabil, d.h. durch impulsförmige Signale
eines Signalgenerators
Zur
Realisierung der vorliegenden Ausführungsform weist die Steuereinheit
weitere Funktioneinheiten auf, nämlich
zunächst
einen Zeitgeber
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102006035225A DE102006035225A1 (en) | 2005-07-26 | 2006-07-26 | Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200520011901 DE202005011901U1 (en) | 2005-07-26 | 2005-07-26 | Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement |
DE202005011901.6 | 2005-07-26 | ||
DE102006035225A DE102006035225A1 (en) | 2005-07-26 | 2006-07-26 | Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement |
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DE102006035225A1 true DE102006035225A1 (en) | 2007-02-01 |
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DE102006035225A Withdrawn DE102006035225A1 (en) | 2005-07-26 | 2006-07-26 | Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009006940U1 (en) | 2009-04-16 | 2010-09-02 | Eto Magnetic Gmbh | Electromagnetic camshaft adjusting device |
DE102009032521A1 (en) * | 2009-07-10 | 2011-01-13 | Continental Automotive Gmbh | Determining the closing time of a fuel injection valve based on an evaluation of the drive voltage |
DE102010022109B3 (en) * | 2010-05-31 | 2011-09-29 | Continental Automotive Gmbh | Determining the closing timing of an injection valve based on an evaluation of the driving voltage using an adapted reference voltage signal |
DE102010012470A1 (en) | 2010-03-24 | 2011-09-29 | Schaeffler Technologies Gmbh & Co. Kg | Valve train for internal combustion engine, has camshaft with carrier shaft and cam piece that is arranged between axial positions in movable manner |
DE102010012471A1 (en) | 2010-03-24 | 2011-09-29 | Schaeffler Technologies Gmbh & Co. Kg | Positioning device e.g. double positioning device, for three speed stroke-variable valve train of combustion engine, has current signal lines passed through one of positioning pins whose outer ends are connected with plug pins |
DE202010010371U1 (en) | 2010-07-16 | 2011-10-17 | Eto Magnetic Gmbh | Electromagnetic actuator |
DE102010035186A1 (en) | 2010-08-24 | 2012-03-01 | Schaeffler Technologies Gmbh & Co. Kg | Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces |
DE102010041320A1 (en) * | 2010-09-24 | 2012-03-29 | Continental Automotive Gmbh | Determining the closing time of a control valve of an indirectly driven fuel injector |
WO2012041936A1 (en) | 2010-10-01 | 2012-04-05 | Continental Automotive Gmbh | Ascertaining the ballistic trajectory of an electromagnetically driven armature of a coil actuator |
DE102011005672A1 (en) | 2011-03-17 | 2012-09-20 | Continental Automotive Gmbh | Modified electrical control of an actuator for determining the time of an anchor stop |
EP2587034A1 (en) * | 2011-10-27 | 2013-05-01 | Continental Automotive GmbH | Method and apparatus for operating a fuel supply system |
DE102010064048B4 (en) * | 2010-12-23 | 2013-05-16 | Continental Automotive Gmbh | Method and device for operating a high-pressure pump |
JP2015018809A (en) * | 2013-07-09 | 2015-01-29 | シュネーデル、エレクトリック、インダストリーズ、エスアーエスSchneider Electric Industries Sas | Device for detecting recovery of circuit breaker, actuator of separation mechanism of circuit breaker contact, electric circuit breaker, and use of induction current for generating recovery display signal |
CN105448456A (en) * | 2015-12-10 | 2016-03-30 | 哈尔滨工程大学 | High-speed electromagnet with magnetic paths in parallel and multiple suction surfaces |
US9583249B2 (en) | 2014-10-31 | 2017-02-28 | Husco Automotive Holdings Llc | Methods and systems for push pin actuator |
WO2020154749A1 (en) * | 2019-01-28 | 2020-08-06 | Msg Mechatronic Systems Gmbh | Electromagnetic actuator |
DE102019118860A1 (en) * | 2019-07-11 | 2021-01-14 | Eto Magnetic Gmbh | Electromagnetic actuator with active return stroke |
CN113493156A (en) * | 2020-04-06 | 2021-10-12 | 奥的斯电梯公司 | Detector for brake |
-
2006
- 2006-07-26 DE DE102006035225A patent/DE102006035225A1/en not_active Withdrawn
Cited By (39)
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DE202009006940U1 (en) | 2009-04-16 | 2010-09-02 | Eto Magnetic Gmbh | Electromagnetic camshaft adjusting device |
WO2010118826A1 (en) | 2009-04-16 | 2010-10-21 | Eto Magnetic Gmbh | Electromagnetic camshaft-adjuster device |
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US8935114B2 (en) | 2009-07-10 | 2015-01-13 | Continental Automotive Gmbh | Determining the closing time of a fuel injection valve based on evaluating the actuation voltage |
DE102009032521A1 (en) * | 2009-07-10 | 2011-01-13 | Continental Automotive Gmbh | Determining the closing time of a fuel injection valve based on an evaluation of the drive voltage |
DE102009032521B4 (en) * | 2009-07-10 | 2016-03-31 | Continental Automotive Gmbh | Determining the closing time of a fuel injection valve based on an evaluation of the drive voltage |
DE102010012470A1 (en) | 2010-03-24 | 2011-09-29 | Schaeffler Technologies Gmbh & Co. Kg | Valve train for internal combustion engine, has camshaft with carrier shaft and cam piece that is arranged between axial positions in movable manner |
DE102010012471A1 (en) | 2010-03-24 | 2011-09-29 | Schaeffler Technologies Gmbh & Co. Kg | Positioning device e.g. double positioning device, for three speed stroke-variable valve train of combustion engine, has current signal lines passed through one of positioning pins whose outer ends are connected with plug pins |
WO2011151128A1 (en) | 2010-05-31 | 2011-12-08 | Continental Automotive Gmbh | Determining the closing point in time of an injection valve on the basis of an analysis of the actuating voltage using an adapted reference voltage signal |
US9494100B2 (en) | 2010-05-31 | 2016-11-15 | Continental Automotive Gmbh | Determining the closing point in time of an injection valve on the basis of an analysis of the actuation voltage using an adapted reference voltage signal |
DE102010022109B3 (en) * | 2010-05-31 | 2011-09-29 | Continental Automotive Gmbh | Determining the closing timing of an injection valve based on an evaluation of the driving voltage using an adapted reference voltage signal |
DE202010010371U1 (en) | 2010-07-16 | 2011-10-17 | Eto Magnetic Gmbh | Electromagnetic actuator |
US9318247B2 (en) | 2010-07-16 | 2016-04-19 | Eto Magnetic Gmbh | Electromagnetic actuating device |
DE102010035186A1 (en) | 2010-08-24 | 2012-03-01 | Schaeffler Technologies Gmbh & Co. Kg | Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces |
DE102010041320B4 (en) * | 2010-09-24 | 2021-06-24 | Vitesco Technologies GmbH | Determination of the closing time of a control valve of an indirectly driven fuel injector |
DE102010041320A1 (en) * | 2010-09-24 | 2012-03-29 | Continental Automotive Gmbh | Determining the closing time of a control valve of an indirectly driven fuel injector |
WO2012041936A1 (en) | 2010-10-01 | 2012-04-05 | Continental Automotive Gmbh | Ascertaining the ballistic trajectory of an electromagnetically driven armature of a coil actuator |
DE102010041880A1 (en) | 2010-10-01 | 2012-04-05 | Continental Automotive Gmbh | Determining the ballistic trajectory of an electromagnetically driven armature of a Spulenaktuators |
KR101829241B1 (en) | 2010-10-01 | 2018-03-29 | 콘티넨탈 오토모티브 게엠베하 | Ascertaining the ballistic trajectory of an electromagnetically driven armature of a coil actuator |
US9448260B2 (en) | 2010-10-01 | 2016-09-20 | Continental Automotive Gmbh | Ascertaining the ballistic trajectory of an electromagnetically driven armature of a coil actuator |
CN103119271A (en) * | 2010-10-01 | 2013-05-22 | 大陆汽车有限公司 | Ascertaining the ballistic trajectory of an electromagnetically driven armature of a coil actuator |
DE102010041880B4 (en) | 2010-10-01 | 2022-02-03 | Vitesco Technologies GmbH | Determining the ballistic trajectory of an electromagnetically driven armature of a coil actuator |
CN103119271B (en) * | 2010-10-01 | 2016-04-13 | 大陆汽车有限公司 | Coil actuator with the determination of the ballistic trajectory of the driven armature of electromagnetic mode |
DE102010064048B4 (en) * | 2010-12-23 | 2013-05-16 | Continental Automotive Gmbh | Method and device for operating a high-pressure pump |
US9412508B2 (en) | 2011-03-17 | 2016-08-09 | Continental Automotive Gmbh | Modified electrical actuation of an actuator for determining the time at which an armature strikes a stop |
DE102011005672A1 (en) | 2011-03-17 | 2012-09-20 | Continental Automotive Gmbh | Modified electrical control of an actuator for determining the time of an anchor stop |
DE102011005672B4 (en) | 2011-03-17 | 2019-07-11 | Continental Automotive Gmbh | Method, device and computer program for the electrical control of an actuator for determining the time of an anchor stop |
WO2012123445A1 (en) | 2011-03-17 | 2012-09-20 | Continental Automotive Gmbh | Modified electrical actuation of an actuator for determining the time at which an armature stops |
EP2587034A1 (en) * | 2011-10-27 | 2013-05-01 | Continental Automotive GmbH | Method and apparatus for operating a fuel supply system |
JP2015018809A (en) * | 2013-07-09 | 2015-01-29 | シュネーデル、エレクトリック、インダストリーズ、エスアーエスSchneider Electric Industries Sas | Device for detecting recovery of circuit breaker, actuator of separation mechanism of circuit breaker contact, electric circuit breaker, and use of induction current for generating recovery display signal |
US9583249B2 (en) | 2014-10-31 | 2017-02-28 | Husco Automotive Holdings Llc | Methods and systems for push pin actuator |
US9761364B2 (en) | 2014-10-31 | 2017-09-12 | Husco Automotive Holdings Llc | Methods and systems for a push pin actuator |
CN105448456A (en) * | 2015-12-10 | 2016-03-30 | 哈尔滨工程大学 | High-speed electromagnet with magnetic paths in parallel and multiple suction surfaces |
WO2020154749A1 (en) * | 2019-01-28 | 2020-08-06 | Msg Mechatronic Systems Gmbh | Electromagnetic actuator |
US11649743B2 (en) | 2019-01-28 | 2023-05-16 | Msg Mechatronic Systems Gmbh | Electromagnetic actuator |
DE102019118860A1 (en) * | 2019-07-11 | 2021-01-14 | Eto Magnetic Gmbh | Electromagnetic actuator with active return stroke |
CN113493156A (en) * | 2020-04-06 | 2021-10-12 | 奥的斯电梯公司 | Detector for brake |
EP3892580A1 (en) * | 2020-04-06 | 2021-10-13 | Otis Elevator Company | Electronic safety actuator for an elevator safety brake and method of detecting position of an electronic safety actuator |
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