EP3608928A1 - Actionneur électromagnétique et appareil de commutation électrique comportant cet actionneur - Google Patents

Actionneur électromagnétique et appareil de commutation électrique comportant cet actionneur Download PDF

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Publication number
EP3608928A1
EP3608928A1 EP19189283.5A EP19189283A EP3608928A1 EP 3608928 A1 EP3608928 A1 EP 3608928A1 EP 19189283 A EP19189283 A EP 19189283A EP 3608928 A1 EP3608928 A1 EP 3608928A1
Authority
EP
European Patent Office
Prior art keywords
equal
actuator
movable part
notches
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.)
Withdrawn
Application number
EP19189283.5A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rémy Orban
Olivier Theron
Sébastien Buffat
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP3608928A1 publication Critical patent/EP3608928A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/641—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/01—Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
    • 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
    • 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
    • H01F2007/086—Structural details of the armature
    • 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
    • H01F2007/1676—Means for avoiding or reducing eddy currents in the magnetic circuit, e.g. radial slots
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • 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
    • 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
    • H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature

Definitions

  • the present invention relates to an electromagnetic actuator and an electrical switching apparatus comprising this actuator.
  • Electrical switching devices such as circuit breakers, used in electrical distribution facilities, generally include an electromagnetic actuator whose function is to switch the electrical device from an electrically closed state to an electrically open state in response to a control signal.
  • an electromagnetic actuator whose function is to switch the electrical device from an electrically closed state to an electrically open state in response to a control signal.
  • a movable part of the actuator is coupled to a switching mechanism of the electrical device.
  • the actuator makes it possible in particular to interrupt the distribution of electricity in the event of detection of an electrical fault.
  • FR-2893445-B1 discloses a known electromagnetic actuator comprising a fixed body, a movable part, and a magnetic excitation circuit adapted to set in motion the movable part.
  • the magnetic circuit includes a permanent magnet and an excitation coil supplied by a control signal.
  • Such actuators must meet many requirements. They must be compact and have reduced dimensions so that they can be easily integrated inside switching devices. They must react quickly in response to the control signal, especially in the event of an electrical fault. They must be reliable and not trigger unexpectedly, as this would affect the operation of the switchgear. In particular, they must not trip when exposed to stray magnetic fields generated during short circuits downstream of the switching device. They must also be able to operate in switching devices in which the control signal is supplied from an on-board energy reserve.
  • the invention more particularly intends to remedy by proposing an electromagnetic actuator whose operation is improved.
  • the mobile part has one or more notches formed in a body of the mobile part.
  • the notches formed in the mobile part make it possible to limit the eddy currents which appear in the mobile part when the coil is excited.
  • the notches make it possible to modify the inductance of the magnetic circuit and therefore to reduce the amount of energy necessary to control the actuation of the actuator.
  • the invention relates to an electrical switching device comprising a switching mechanism and an electromagnetic actuator coupled to the switching mechanism, the electromagnetic actuator being as described above.
  • the figure 1 represents an electromagnetic actuator 2 comprising a fixed body 4 and a movable part 6 which forms a magnetic core of the actuator 2.
  • the movable part 6 is movable in translation relative to the fixed body 4 along a longitudinal axis Z2 of the actuator 2 between a deployed position and a retracted position.
  • a deployed position also called “release position”
  • the mobile part 6 In the deployed position, also called “release position”, the mobile part 6 is at least partially deployed outside the fixed body 4.
  • the retracted position also called “arming position”
  • the mobile part 6 In the retracted position, also called “arming position”, the mobile part 6 is retracted inside the fixed body 4.
  • the body 4 here forms a cylinder-shaped cylinder head centered on the longitudinal axis Z2.
  • the cylinder head guides in translation the movable part 6 during its movement between the retracted and deployed positions.
  • the actuator 2 also comprises a magnetic excitation circuit 8 comprising, in addition to the mobile part 6, a magnetic part 10 forming a core of the magnetic circuit and which creates a first magnetic force to retain the mobile part 6 in the retracted position when the actuator 2 is not energized.
  • the part 10 has the shape of a flat disc centered on the longitudinal axis Z2.
  • the main faces of the part 10 are perpendicular to the axis Z2.
  • the part 10 is made of material having a permanent magnetization, preferably of ferromagnetic material.
  • the magnetic circuit 8 also includes a coil 12 capable of generating a second magnetic force opposite to the first magnetic force when it is powered by an electric excitation current.
  • the second magnetic force is opposed to the first magnetic force and allows the mobile part 6 to be released, as explained below.
  • the coil 12 comprises for example turns of an electrically conductive wire wound concentrically around the axis Z2.
  • the magnetic circuit 8 also includes a part 14 for concentrating the magnetic flux.
  • the part 14 is in contact with an upper face of the magnetic part 10 by its lower face. In the retracted position, the mobile part 6 is in contact with an upper part of the part 14.
  • the actuator also comprises an elastic return member 16 mechanically coupled with the mobile part 6 and which exerts a return force, tending to move the mobile part 6 towards its deployed position.
  • the return member 16 is a spring, in particular a compression helical spring mounted coaxially around the axis Z2.
  • the first force exerted by the magnetic part 10 is greater than the restoring force exerted by the member 16, so that the movable part 6 remains in its retracted position.
  • the coil 12 is excited by means of an electric supply current, for example in response to a control signal sent to the actuator 2, it generates a magnetic field opposing that created by the part 10 thus decreasing the resulting magnetic force.
  • the restoring force exerted by the member 16 then moves the movable part 6 towards the deployed position.
  • the mobile part 6 comprises a main body of essentially cylindrical shape and a straight portion in the form of a narrow rod which extends longitudinally from an upper end of the main body.
  • the movable part 6 comprises a movable head 18 slidingly mounted along the rod-shaped portion and coupled with a secondary return member 20 itself mounted on the movable part 6.
  • the member 20 is a concentric helical spring with the axis Z2.
  • the return member 16 rests on the one hand on the body 4 and on the other hand, on the opposite end, on the head 18.
  • the fixed body 4 is formed by assembling at least two parts 22 and 24 arranged concentrically and for example connected together by a seal.
  • the reference 26 designates a bottom plate which closes the body 4 on its lower end.
  • the magnetic piece 10 is mounted on an upper face of the bottom plate 26.
  • the head 18 extends to the opposite end of the body 4.
  • the actuator 2 is analogous to the actuator described in the patent FR 2 893 445 B1 and works similarly.
  • the movable part 6 comprises one or more notches 30, such as slots or recesses, formed in the main body of the movable part 6.
  • the notches 30 extend from a peripheral edge 32 of the main body of the movable part 6.
  • the notches 30 are radial notches, that is to say notches arranged radially relative to the center of the movable part 6, that is to say here relative to the longitudinal axis of the mobile part 6.
  • the longitudinal axis of the mobile part 6 coincides with the axis Z2 when the mobile part 6 is mounted in the actuator 2.
  • the notches 30 extend essentially perpendicular to the peripheral edge 32 of the mobile part 6.
  • each notch 30 extends from the peripheral edge 32 of the movable part 6 towards the center of the movable part 6 by defining a portion of radial section of the movable part 6.
  • portion of radial section means here that the notch 30 does not form a complete radial section of the mobile part 6, because the notch 30 does not extend completely to the center of the mobile part 6.
  • each notch 30 is finished in the direction from the center by an inner end edge 34 which is located at a non-zero distance from the center.
  • the reference R6 designates the radius of the mobile part 6, measured at the main body of the mobile part 6 where the notches are formed 30.
  • the reference w30 designates the angle between the opposite edges of a notch 30. For example , the angle w30 is measured at the edge 32.
  • the reference l30 designates the width of a notch 30.
  • the notches 30 of the movable part 6 are identical.
  • the notches 30 are regularly spaced from one another, that is to say that they are distributed uniformly around the entire periphery of the movable part 6.
  • the movable part 6 has a symmetry of revolution around the axis Z2 when the mobile part 6 is mounted inside the actuator 2.
  • the number of radial notches 30 is greater than or equal to one and, preferably, between 1 and 10 and, more preferably, between 3 and 10. In the example illustrated, the number d 'notches 30 equals four.
  • the angle w30 of a notch is greater than or equal to 5 ° and less than or equal to 50 °, or the angle w30 is greater than or equal to 20 ° and less than or equal to 40 °.
  • the width l30 is greater than or equal to 5 ° and less than or equal to 20 °. Other angle values are possible.
  • the notches 30 extend in height along the main body of the mobile part 6 parallel to the longitudinal axis of the mobile part 6.
  • the notches 30 have a height greater than or equal to 20% of the length of the main body of the movable part 6.
  • the radius R6 of the movable part 6 is preferably greater than or equal to 3 mm and less than or equal to 10 mm.
  • the length L30 of the radial notches is greater than or equal to 30% of the radius R6 and less than or equal to 90% of the radius R6 and, preferably, is greater than or equal to 40% of the radius R6 and less than or equal to 70 % of radius R6.
  • the precise values of the number and dimensions of the slots 30 are optimized according to the applications and in particular the performance expected by the actuator 2. According to examples, it is preferable to increase the perimeter of the mobile part 6 while retaining a section w30 high enough for the first magnetic force to be sufficient to ensure correct operation of the actuator 2.
  • the ratio of the length of the perimeter of the movable part 6 to the perimeter of a disc of the same radius devoid of notches 30 is greater than or equal to 1.5 and preferably greater than or equal to 2 and, more preferably, greater than or equal to 5.
  • each notch 30 has an oblong shape whose lateral edges are parallel to each other.
  • each notch 30 has a quadrilateral shape, for example a rectangular shape.
  • the width l30 is the same whether it is measured at the edge 34 of the movable part 6 or at the edge 32 of the part.
  • the coil 12 When the coil 12 is energized to control the actuator 2, it creates a magnetic flux aligned along the axis Z2. This magnetic flux generates eddy currents inside the movable part 6, which leads to an energy loss. These eddy currents generally circulate in the plane of the movable part 6 perpendicular to the direction of the magnetic flux, along the peripheral edge 32.
  • the arrangement of the notches 30 tangentially to the magnetic flux created by the coil 12 makes it possible to increase the length of equivalent path traveled by eddy currents, which hinders their circulation and reduces energy loss.
  • the choice of the number and the size of the notches 30 makes it possible to modify the reluctance of the mobile part 6, which makes it possible to optimize the value of the inductance of the mobile part 6 and therefore to reduce the amount of energy required to trigger the actuator 2.
  • the notches 30 reduce the mass of the moving part 6.
  • the moving part 6 is thus easier to move.
  • the response time of response of the actuator 2 is therefore reduced.
  • the movable part 6 is made of an iron-silicon alloy.
  • the mass concentration of silicon in the iron-silicon alloy is greater than or equal to 2% and less than or equal to 6.5%, preferably greater than or equal to 2.5% and less than or equal to 3, 5%.
  • the mobile part 6 is produced according to a metal injection molding process (“Metal Injection Molding” in English).
  • Iron - Silicon makes it possible to obtain magnetic performances close to those of pure iron, in particular in terms of saturation induction and magnetic permeability, while having an electrical resistivity at least two to three times higher than that of pure iron, which makes it possible to limit the energy losses by eddy currents when the second magnetic force is applied to the part 10.
  • the manufacture of the movable part 6 according to a metal injection molding process makes it possible to manufacture the movable part 6 in an iron-silicon alloy more easily than with known shaping techniques, for example by machining or by turning. , which do not give satisfactory results on an Iron - Silicon alloy, in particular for the manufacture of small parts, as is the case of the movable part 6.
  • the figure 4 represents a mobile part 6 'corresponding to another embodiment of the mobile part 6.
  • the elements of the mobile part 6' which are similar to the mobile part 6 have the same references increased by the symbol "'" and are not described in detail, as far as the above description can be transposed.
  • the mobile part 6 ′ is in particular capable of being integrated inside the actuator 2 in place of the mobile part 6.
  • the notches 30 ′ are here arranged on either side of a central geometric plane of the movable part 6 ′ and are aligned perpendicular to this plane in parallel directions.
  • the central plane is perpendicular to the cutting plane illustrating the movable part 6 'on the figure 4 and therefore parallel to the axis Z2.
  • a first group of notches 30 ' is arranged on one side of the central plane and a second group of notches 30' is arranged on the other side of the central plane.
  • the number of notches 30 ′ is the same in each of the first and second groups.
  • the central plane is a plane of symmetry of the movable part 6 '.
  • the number of notches 30 'in each of the first and second groups is greater than or equal to 2 and less than or equal to 6.
  • the number and dimensions of the notches 30' depend on the manufacturing process. of the movable part 6 'and in particular of the demouldability constraints.
  • each of the first and second groups has four notches 30 '.
  • the mobile part 6 ′ is made of the same material as the mobile part 6, and according to a manufacturing process similar to that of the mobile part 6.
  • the respective inner end edges 34 of the notches 30 'situated on the same side of the central plane are aligned and located at the same distance from the central plane. Due to the circular shape of the peripheral edge 32, the notches 30 'whose inner end edges 34 are aligned along the same axis may in this case have different lengths L30'.
  • the reference “LA” designates the distance between the inner end edges 34 of the notches 30 'of the first group and the second group.
  • the distance LA here is greater than or equal to 5% of the diameter of the mobile part 6 'and less than or equal to 30% of the diameter of the mobile part 6'.
  • the dimensions of the notches 30 ' such as the maximum value of the length L30' of the notches 30 ', the spacing W30' between two consecutive notches 30 'and the width l30' of the notches 30 'are chosen in a similar fashion.
  • the figure 5 shows an electrical switching device 40, such as a circuit breaker, or a contactor, or a relay, or any other equivalent device.
  • the apparatus 40 includes connection terminals 41 for input / output of the current, separable electrical contacts 42, a switching mechanism 44 and the actuator 2.
  • the separable contacts 42 are connected between the terminals 41 and are switchable between an open state and a closed state to prevent or authorize, respectively, the flow of electric current, under the action of the switching mechanism 44.
  • the actuator 2 is coupled to the switching mechanism 44 so as to trigger the opening of the separable contacts 42, for example in response to a control signal supplied by a trigger or by a control unit external to the device 40.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnets (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
EP19189283.5A 2018-08-01 2019-07-31 Actionneur électromagnétique et appareil de commutation électrique comportant cet actionneur Withdrawn EP3608928A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1857209A FR3084772B1 (fr) 2018-08-01 2018-08-01 Actionneur electromagnetique et appareil de commutation electrique comportant cet actionneur

Publications (1)

Publication Number Publication Date
EP3608928A1 true EP3608928A1 (fr) 2020-02-12

Family

ID=63722629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19189283.5A Withdrawn EP3608928A1 (fr) 2018-08-01 2019-07-31 Actionneur électromagnétique et appareil de commutation électrique comportant cet actionneur

Country Status (7)

Country Link
US (1) US11501940B2 (ko)
EP (1) EP3608928A1 (ko)
JP (1) JP2020021938A (ko)
KR (1) KR20200014692A (ko)
CN (1) CN110797237A (ko)
BR (1) BR102019013805A2 (ko)
FR (1) FR3084772B1 (ko)

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DE19709089A1 (de) * 1997-03-06 1998-09-10 Abb Patent Gmbh Permanentmagnetischer Antrieb für einen Schalter
FR2893445A1 (fr) * 2005-11-14 2007-05-18 Schneider Electric Ind Sas Relais electromagnetique polarise a accrochage magnetique
DE102007028203B3 (de) * 2007-06-15 2008-12-04 Siemens Ag Magnetisches Antriebssystem für eine Schalteinrichtung
WO2017041925A1 (de) * 2015-09-11 2017-03-16 Continental Automotive Gmbh Kraftstoffinjektor, verfahren zum ermitteln der position eines beweglichen ankers und motorsteuerung

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EP2392016A4 (en) * 2009-01-27 2017-11-29 Borgwarner Inc. Solenoid arrangement with segmented armature member for reducing radial force
DE102009055365A1 (de) * 2009-12-29 2011-06-30 Robert Bosch GmbH, 70469 Magnetventil sowie Fahrerassistenzeinrichtung
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Publication number Priority date Publication date Assignee Title
US2539547A (en) * 1945-06-13 1951-01-30 Clare & Co C P Relay
DE19709089A1 (de) * 1997-03-06 1998-09-10 Abb Patent Gmbh Permanentmagnetischer Antrieb für einen Schalter
FR2893445A1 (fr) * 2005-11-14 2007-05-18 Schneider Electric Ind Sas Relais electromagnetique polarise a accrochage magnetique
FR2893445B1 (fr) 2005-11-14 2010-10-15 Schneider Electric Ind Sas Relais electromagnetique polarise a accrochage magnetique
DE102007028203B3 (de) * 2007-06-15 2008-12-04 Siemens Ag Magnetisches Antriebssystem für eine Schalteinrichtung
WO2017041925A1 (de) * 2015-09-11 2017-03-16 Continental Automotive Gmbh Kraftstoffinjektor, verfahren zum ermitteln der position eines beweglichen ankers und motorsteuerung

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BR102019013805A2 (pt) 2020-02-18
JP2020021938A (ja) 2020-02-06
KR20200014692A (ko) 2020-02-11
FR3084772B1 (fr) 2021-06-18
US11501940B2 (en) 2022-11-15
RU2019122634A (ru) 2021-01-18
CN110797237A (zh) 2020-02-14
FR3084772A1 (fr) 2020-02-07
US20200043688A1 (en) 2020-02-06

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