EP1188222B1 - Magnetic linear drive - Google Patents
Magnetic linear drive Download PDFInfo
- Publication number
- EP1188222B1 EP1188222B1 EP00947808A EP00947808A EP1188222B1 EP 1188222 B1 EP1188222 B1 EP 1188222B1 EP 00947808 A EP00947808 A EP 00947808A EP 00947808 A EP00947808 A EP 00947808A EP 1188222 B1 EP1188222 B1 EP 1188222B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- active part
- magnetically active
- current
- linear drive
- 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.)
- Expired - Lifetime
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
- H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
- H01F7/1816—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current making use of an energy accumulator
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- 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
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
- H01H2003/268—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor using a linear motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
Definitions
- the invention relates to a magnetic Linear drive, especially for an electrical switch, with a coil to which a current can be applied, in whose Inside by the current in an axial direction magnetic flux can be generated with an armature that is only movable perpendicular to the axial direction and which has a magnetically active part, the Path of motion through an air gap inside the coil penetrating core or on one end of the Kernes passes, the magnetically active part is unmagnetized or is magnetized such that the magnetic Flow inside the magnetically active part runs parallel or anti-parallel to the axial direction (see GB-A-829 782).
- US Pat. No. 5,719,451 is also a magnetic one Linear actuator known, for example for use there in liquid pumps.
- the linear drives shown there is common that a solenoid in an armature Accelerated axial direction of the coil.
- Such a magnetic linear drive is for example also known from GB 10 68 610.
- Actuator is an actuator for a valve, at by means of the movement of an anchor, a liquid channel is locked or opened.
- the armature has a permanent magnet there, the magnetic one Flow inside it in the direction of movement of the armature and aligned perpendicular to the axial direction is.
- the armature moves against mechanical ones Stops such that one pole of the permanent magnet comes into contact with the stop and that through the magnetic Effect of the permanent magnet on the stop is held.
- the present invention is based on the object a magnetic linear drive of the aforementioned Kind of creating an instantaneous acceleration of the Anchor with little design effort and little control effort reached.
- the object is achieved in that the magnetically active part in two end positions permanently positionable and by the action of a current from a first end position can be converted into a second end position is.
- a current is applied to the coil, then in its Generates a magnetic flux inside in the axial direction, which runs inside the core and in the area of the air gap emerges from the core.
- a magnetically active part of a Anchor that, for example, ferromagnetically unmagnetized or magnetized, especially permanently magnetized in one Direction anti-parallel to the direction of the magnetic flux the coil is accelerated towards the inside of the coil.
- a magnet whose inner magnetic flux is parallel to the Flow of the coil is aligned from the inside of the Coil pushed off. This effect drives the Anchor exploited.
- the magnetic linear drive advantageous as a switch drive for an electrical Switches, for example a high voltage circuit breaker or a vacuum switch can be used.
- the anchor is in an end position of its movement path such that when the coil current is switched on a small amount of magnetic flux through the coil magnetically active part passes through, this leads to that the armature is accelerated towards the center of the coil until a maximum part of the magnetic flux of the coil through the magnetically active part passes through.
- the armature is the current flow through the coil by means of a Control device interrupted so that the anchor due its dynamic energy and the dynamic energy of driven masses continues to move beyond the coil, without the magnetic flux of the coil due to the action brake the armature onto the magnetically active part can.
- a desired acceleration profile of the armature can, for example can be achieved in that the air gap between the core and the trajectory of the magnetically active Partly different width along the trajectory becomes.
- the anchor is, for example, a drive rod electrical switch connected, which in turn a Switch contact of a breaker unit drives.
- Mechanical stops can be in the area of the shift rod or be realized in the area of the linear drive itself.
- An advantageous embodiment of the invention provides that the magnetically active part is magnetized and that in at least an end position of the magnetically active part thereof at least partially in the area of one outside the Coil arranged yoke body is arranged that the out the magnetically active part out or enters it magnetic flux at least in part directly through a the magnetically active part facing boundary surface of the Yoke body passes through.
- the boundary surface is advantageously essentially vertical aligned with the axial direction.
- the magnetically active part magnetizes, for example as an electromagnet or permanently magnetized
- the magnetic flux of the magnetically active part has the Tends to have an air gap adjacent to one another To reduce the yoke body as much as possible.
- At least one is in the end region of the movement path of the armature Yoke body arranged in which the magnetic flux of the magnetic active part over at least part of the length of the magnetically active part can occur.
- a force effect thus takes place on the anchor, which strives is as large an overlap as possible between the magnetic to generate the active part and the yoke body in such a way that as much as possible the entire magnetic flux of the magnetically active Partially in the yoke body by as vertical as possible enter the boundary surface arranged to the axial direction can.
- the force effect in the direction of the path of movement of the anchor is essentially independent of how far the magnetic active part and the yoke body overlap.
- Such an arrangement can be advantageous for both end positions realized the magnetically active part or the armature his.
- a further advantageous embodiment of the invention provides before that the coil with respect to the trajectory of the magnetic active part is opposite a second coil with a 6
- first and the second Coil offset against each other in the direction of movement of the armature are.
- the anchor against each other can have a certain acceleration profile can be reached along the trajectory.
- each of the coils for each one of the directions of movement of the armature is used.
- two yoke bodies are provided, each other with respect to the trajectory opposite of the magnetically active part and the between air gaps form, at least partially from the trajectory of the magnetically active part are penetrated.
- the first yoke body With respect to the path of movement of the magnetically active part, becomes the magnetic circuit for both the flow through the coil as well as for the flow of the magnetically active Partially closed in each of the end positions, so that each a great force effect for both acceleration and is also achieved for the holding force in the end positions.
- a further advantageous embodiment of the invention provides before, in the control device several rechargeable and occasionally jointly or alternatively connectable to the coil Charging capacitors are provided.
- the different charging capacitors can be used for different Switching cases (for example different load cases of a circuit breaker to be driven) or different can be used for switching on and off.
- the invention also relates to a method of operation of a magnetic linear actuator, in which provided is that the coil for driving the armature in different Each direction is charged with a current of the same direction becomes.
- the method according to the invention can advantageously be designed as a result be that the application of a current ends before the magnetically active part reaches its end position has reached.
- Another advantageous embodiment provides that the Current flow through the coil is interrupted as soon as due of an electrical oscillation process the supply voltage to her Sign reverses.
- the coil has an electrical inductance as well as an ohmic Represents resistance and normally by a capacitance is fed, there is an electrical resonant circuit in the control of the linear drive. This leads to Generation of an electrical oscillation, so that at the Coil applied supply voltage reverses its sign at some point.
- the current flow is diverted to a charging capacitor as soon as the supply voltage due to an electrical vibration process you Sign reverses.
- FIG. 1 shows a magnetic linear drive, with an anchor 1 made of a rod 2 made of glass fiber reinforced Plastic and a magnetically active part 3 consists of a permanent magnetic material and to the at one end a shift rod 4 is coupled, which is only schematic shown and with a drivable switch contact 5 the interrupter unit of a high-voltage circuit breaker connected is.
- the linear drive generates movements in Direction of the double arrow 6.
- the armature 1 moves in the air gap 7 between one first yoke body 8 and a second yoke body 9, each other mirror image of the movement path of the armature 1 are opposite.
- Each of the yoke bodies has an annular recess, in each of which a coil 10, 11 is introduced.
- the spools 10, 11 are each provided with electrical connections and can be supplied with a current by means of a control device.
- the current direction is such that in the upper part of the coil 10, the current in the plane of the drawing runs in and in the lower part of the coil the current from the Drawing level emerges as illustrated by point 12 becomes.
- part 16 of the magnetic flux 13 already occurs of the coils 10, 11 through an edge region of the magnetically active Part 3 of the anchor through.
- the magnetic flux tends to be magnetic to accelerate active part 3 downwards in the display, so that the magnetic flux 13 of the coils 10, 11 on the greatest possible length of the magnetically active part 3 passes through it and antiparallel to the inside of the magnetically active part 3 prevailing magnetic flux 17 runs.
- the anchor keeps moving because of the dynamic energy, until that a second, dashed end position 36 of the magnetically active part 3 is reached.
- the magnetic flux 17 within the magnetically active part 3 the endeavor to have the smallest possible air gap in one of the yoke bodies 8, 9 and exit it again.
- Part of the magnetic flux 17 inside the magnetic active part 3 can directly into the yoke body 8 enter through the boundary surface 35, the flow over the second yoke body 9 with the interposition of the inevitable Air gap is closed, so that from there magnetic flux reenter the magnetically active part 3 can.
- the magnetic force on the armature 1 is here largely regardless of how far the magnetically active Part 3 with the part of the yoke body 8 above the coil 10 already overlapped. Therefore, the holding force on the anchor is in the end position largely independent of mechanical tolerances.
- FIG. 1 also shows that both yoke bodies 8, 9 in the area of the cores 14, 15 along the movement path of the magnetically active part are profiled such that the Air gap between the armature 3 and the yoke bodies 8, 9 after becomes wider at the top. This means that the force effect on the magnetically active part 3 during its movements decreases upwards. This way when you turn off the Break unit at the start of the movement high acceleration and towards the end a weakening one Acceleration can be achieved. It is also conceivable that for example the second coil 11 opposite the first coil 10 offset down along the path of movement of the armature 1 is, so that when switching off, d. H. a movement the armature 1 from bottom to top, first the second coil 11 would bear the brunt of acceleration and later the first coil 10.
- FIG. 2 shows a control circuit with a Charging capacitor 19, which has a first IGBT (insulatedgate bipolar transistor) 20 and a second IGBT 21 with the Coil 22 connectable within the magnetic linear drive is.
- IGBT insulatedgate bipolar transistor
- FIG. 2 shows a control circuit with a Charging capacitor 19, which has a first IGBT (insulatedgate bipolar transistor) 20 and a second IGBT 21 with the Coil 22 connectable within the magnetic linear drive is.
- IGBT insulatedgate bipolar transistor
- the capacitor 19 discharges, the voltage at the drops Coil 22 and a counter voltage is induced there, the endeavors to maintain the current of the current 24.
- the counter voltage on the coil 22 is the supply voltage opposite, so that there is a voltage zero crossing results.
- the IGBTs 21, 22 are turned off, d. H. they shut off the electricity.
- FIG. 3 shows schematically the energy supply of a linear drive via three different control units 31, 32, 33, each of which has its own charging capacitor, where the charging capacitors have different capacitances can have. This makes for different switching cases each have a different amount of energy in the form of electrical field energy stored in the charging capacitors made available.
- the different controls 31, 32, 33 can also used for quick successive off-on-off switching become
Abstract
Description
Die Erfindung bezieht sich auf einen magnetischen Linearantrieb, insbesondere für einen elektrischen Schalter, mit einer mit einem Strom beaufschlagbaren Spule, in deren Innerem durch den Strom in einer Axialrichtung ein magnetischer Fluß erzeugbar ist, mit einem Anker, der ausschließlich senkrecht zu der Axialrichtung beweglich ist und der einen magnetisch aktiven Teil aufweist, dessen Bewegungsbahn durch einen Luftspalt innerhalb eines die Spule durchsetzenden Kernes hindurch oder an einer Stirnseite des Kernes vorbeiführt, wobei der magnetisch aktive Teil unmagnetisiert ist oder derart magnetisiert ist, daß der magnetische Fluß innerhalb des magnetisch aktiven Teils parallel oder antiparallel zu der Axialrichtung verläuft (siehe GB-A- 829 782).The invention relates to a magnetic Linear drive, especially for an electrical switch, with a coil to which a current can be applied, in whose Inside by the current in an axial direction magnetic flux can be generated with an armature that is only movable perpendicular to the axial direction and which has a magnetically active part, the Path of motion through an air gap inside the coil penetrating core or on one end of the Kernes passes, the magnetically active part is unmagnetized or is magnetized such that the magnetic Flow inside the magnetically active part runs parallel or anti-parallel to the axial direction (see GB-A-829 782).
Aus der US-Patentschrift 4,817,494 ist ein magnetischer Linearantrieb zum Beschleunigen eines Projektils bekannt.From U.S. Patent 4,817,494 is a magnetic Linear drive known to accelerate a projectile.
Aus der US-Patentschrift 5,719,451 ist ebenfalls ein magnetischer Linearantrieb bekannt, dort beispielsweise zur Anwendung in Flüssigkeitspumpen. Den dort dargestellten Linearantrieben ist gemeinsam, dass eine Magnetspule einen Anker in Axialrichtung der Spule beschleunigt.US Pat. No. 5,719,451 is also a magnetic one Linear actuator known, for example for use there in liquid pumps. The linear drives shown there is common that a solenoid in an armature Accelerated axial direction of the coil.
Ein derartiger magnetischer Linearantrieb ist beispielsweise
auch aus der GB 10 68 610 bekannt. Bei dem dort beschriebenen
Antrieb handelt es sich um einen Antrieb für ein Ventil, bei
dem mittels der Bewegung eines Ankers ein Flüssigkeitskanal
abgesperrt oder geöffnet wird. Such a magnetic linear drive is for example
also known from
Der Anker weist dort einen Permanentmagneten auf, dessen magnetischer Fluß in seinem Inneren in der Bewegungsrichtung des Ankers und senkrecht zu der Axialrichtung ausgerichtet ist.The armature has a permanent magnet there, the magnetic one Flow inside it in the direction of movement of the armature and aligned perpendicular to the axial direction is.
In seinen Endstellungen fährt der Anker jeweils gegen mechanische Anschläge derart, daß jeweils ein Pol des Dauermagneten mit dem Anschlag in Berührung kommt und daß durch die magnetische Wirkung des Dauermagneten dieser an dem Anschlag gehalten wird.In its end positions, the armature moves against mechanical ones Stops such that one pole of the permanent magnet comes into contact with the stop and that through the magnetic Effect of the permanent magnet on the stop is held.
Wird die Spule mit einem Strom beaufschlagt, so muß die magnetische Wirkung des Stroms zunächst die Haltekraft des Permanentmagneten am Anschlag überwinden. Dies äußert sich in einer Verzögerung der Ankerbeschleunigung. Außerdem wird der Anker bei seiner Bewegung zu einer Endstellung hin erst unmittelbar vor Erreichen des Anschlages zum Anschlag gezogen, da der zwischen dem Pol des Permanentmagneten und der Anschlagsfläche befindliche Luftspalt erst zum Ende der Bewegung hin genügend verkleinert ist.If a current is applied to the coil, the magnetic Effect of the current initially the holding force of the permanent magnet overcome at the stop. This manifests itself in a delay in armature acceleration. In addition, the The anchor only moves immediately when it moves to an end position pulled to the stop before reaching the stop, since the between the pole of the permanent magnet and the stop surface air gap only at the end of the movement is sufficiently reduced.
Demgegenüber liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen magnetischen Linearantrieb der eingangs genannten Art zu schaffen, der eine unverzögerte Beschleunigung des Ankers bei geringem konstruktivem Aufwand und geringem Steuerungsaufwand erreicht.In contrast, the present invention is based on the object a magnetic linear drive of the aforementioned Kind of creating an instantaneous acceleration of the Anchor with little design effort and little control effort reached.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der magnetisch aktive Teil in zwei Endpositionen dauerhaft positionierbar und durch Einwirkung eines Stromes von einer ersten Endposition in eine zweite Endposition überführbar ist. The object is achieved in that the magnetically active part in two end positions permanently positionable and by the action of a current from a first end position can be converted into a second end position is.
Wird die Spule mit einem Strom beaufschlagt, so wird in ihrem Inneren in der Axialrichtung ein magnetischer Fluß erzeugt, der innerhalb des Kerns verläuft und im Bereich des Luftspaltes aus dem Kern austritt. Ein magnetisch aktiver Teil eines Ankers, der beispielsweise ferromagnetisch unmagnetisiert oder magnetisiert, insbesondere dauermagnetisiert in einer Richtung antiparallel zu der Richtung des magnetischen Flusses der Spule ist, wird zum Spuleninneren hin beschleunigt. Ein Magnet, dessen innerer magnetischer Fluß parallel zum Fluß der Spule ausgerichtet ist, wird aus dem Inneren der Spule heraus abgestoßen. Dieser Effekt wird zum Antrieb des Ankers ausgenutzt.If a current is applied to the coil, then in its Generates a magnetic flux inside in the axial direction, which runs inside the core and in the area of the air gap emerges from the core. A magnetically active part of a Anchor that, for example, ferromagnetically unmagnetized or magnetized, especially permanently magnetized in one Direction anti-parallel to the direction of the magnetic flux the coil is accelerated towards the inside of the coil. A magnet whose inner magnetic flux is parallel to the Flow of the coil is aligned from the inside of the Coil pushed off. This effect drives the Anchor exploited.
Insbesondere dann, wenn der magnetisch aktive Teil ferromagnetisch oder als Dauermagnet in antiparalleler Richtung zu der Axialrichtung magnetisiert ist, kann der magnetische Linearantrieb vorteilhaft als Schalterantrieb für einen elektrischen Schalter, beispielsweise einen Hochspannungsleistungsschalter oder einen Vakuumschalter, verwendet werden.Especially when the magnetically active part is ferromagnetic or as a permanent magnet in the anti-parallel direction is magnetized in the axial direction, the magnetic linear drive advantageous as a switch drive for an electrical Switches, for example a high voltage circuit breaker or a vacuum switch can be used.
Befindet sich der Anker in einer Endposition seiner Bewegungsbahn derart, daß beim Einschalten des Spulenstromes der magnetische Fluß der Spule zu einem geringen Anteil durch den magnetisch aktiven Teil hindurchtritt, so führt dies dazu, daß der Anker zur Spulenmitte hin beschleunigt wird, bis ein maximaler Teil des magnetischen Flusses der Spule durch den magnetisch aktiven Teil hindurchtritt. Während der Bewegung des Ankers wird der Stromfluß durch die Spule mittels einer Steuereinrichtung unterbrochen, so daß der Anker aufgrund seiner dynamischen Energie und der dynamischen Energie der angetriebenen Massen sich über die Spule hinaus weiter bewegt, ohne daß der magnetische Fluß der Spule durch die Ein-wirkung auf den magnetisch aktiven Teil den Anker abbremsen kann.The anchor is in an end position of its movement path such that when the coil current is switched on a small amount of magnetic flux through the coil magnetically active part passes through, this leads to that the armature is accelerated towards the center of the coil until a maximum part of the magnetic flux of the coil through the magnetically active part passes through. During the movement the armature is the current flow through the coil by means of a Control device interrupted so that the anchor due its dynamic energy and the dynamic energy of driven masses continues to move beyond the coil, without the magnetic flux of the coil due to the action brake the armature onto the magnetically active part can.
Auf diese Weise ist eine optimale Beschleunigung des Ankers zu Beginn der Bewegung gewährleistet.This is an optimal acceleration of the anchor guaranteed at the beginning of the movement.
Ein gewünschtes Beschleunigungsprofil des Ankers kann beispielsweise dadurch erreicht werden, daß der Luftspalt zwischen dem Kern und der Bewegungsbahn des magnetisch aktiven Teils entlang der Bewegungsbahn unterschiedlich breit ausgebildet wird. Je geringer der Luftspalt in einem bestimmten Bereich entlang der Bewegungsbahn ist, desto größer ist die Kraftwirkung auf den Anker in diesem Bereich.A desired acceleration profile of the armature can, for example can be achieved in that the air gap between the core and the trajectory of the magnetically active Partly different width along the trajectory becomes. The smaller the air gap in a particular one Area along the trajectory, the larger the Force effect on the anchor in this area.
Mit dem Anker ist beispielsweise eine Antriebsstange eines elektrischen Schalters verbunden, die ihrerseits einen Schaltkontakt einer Unterbrechereinheit antreibt.With the anchor is, for example, a drive rod electrical switch connected, which in turn a Switch contact of a breaker unit drives.
Mechanische Anschläge können im Bereich der Schaltstange oder im Bereich des Linearantriebs selbst realisiert sein.Mechanical stops can be in the area of the shift rod or be realized in the area of the linear drive itself.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der magnetisch aktive Teil magnetisiert ist und daß in wenigstens einer Endposition des magnetisch aktiven Teils dieser wenigstens teilweise derart im Bereich eines außerhalb der Spule angeordneten Jochkörpers angeordnet ist, daß der aus dem magnetisch aktiven Teil aus- oder in diesen eintretende magnetische Fluß wenigstens zum Teil unmittelbar durch eine dem magnetisch aktiven Teil zugewandte Begrenzungsfläche des Jochkörpers hindurchtritt.An advantageous embodiment of the invention provides that the magnetically active part is magnetized and that in at least an end position of the magnetically active part thereof at least partially in the area of one outside the Coil arranged yoke body is arranged that the out the magnetically active part out or enters it magnetic flux at least in part directly through a the magnetically active part facing boundary surface of the Yoke body passes through.
Die Begrenzungsfläche ist vorteilhaft im wesentlichen senkrecht zu der Axialrichtung ausgerichtet. The boundary surface is advantageously essentially vertical aligned with the axial direction.
Für den Fall, daß der magnetisch aktive Teil magnetisiert, beispielsweise als Elektromagnet, oder dauermagnetisiert ist, hat der magnetische Fluß des magnetisch aktiven Teils die Tendenz, einen Luftspalt zu einem benachbart angeordneten Jochkörper möglichst zu verringern.In the event that the magnetically active part magnetizes, for example as an electromagnet or permanently magnetized, the magnetic flux of the magnetically active part has the Tends to have an air gap adjacent to one another To reduce the yoke body as much as possible.
Im Endbereich der Bewegungsbahn des Ankers ist wenigstens ein Jochkörper angeordnet, in den der magnetische Fluß des magnetisch aktiven Teils wenigstens auf einem Teil der Länge des magnetisch aktiven Teils eintreten kann.At least one is in the end region of the movement path of the armature Yoke body arranged in which the magnetic flux of the magnetic active part over at least part of the length of the magnetically active part can occur.
Auf den Anker findet somit eine Kraftwirkung statt, die bestrebt ist, eine möglichst große Überlappung zwischen dem magnetisch aktiven Teil und dem Jochkörper zu erzeugen derart, daß möglichst der gesamte magnetische Fluß des magnetisch aktiven Teils in den Jochkörper durch eine möglichst senkrecht zu der Axialrichtung angeordnete Begrenzungsfläche eintreten kann. Die Kraftwirkung in Richtung der Bewegungsbahn des Ankers ist im wesentlichen unabhängig davon, wieweit der magnetisch aktive Teil und der Jochkörper überlappen.A force effect thus takes place on the anchor, which strives is as large an overlap as possible between the magnetic to generate the active part and the yoke body in such a way that as much as possible the entire magnetic flux of the magnetically active Partially in the yoke body by as vertical as possible enter the boundary surface arranged to the axial direction can. The force effect in the direction of the path of movement of the anchor is essentially independent of how far the magnetic active part and the yoke body overlap.
Hierdurch ist eine von der Stellung des Ankers im Endbereich der Bewegung im wesentlichen unabhängige Haltekraft realisiert, die den Anker in einer seiner Endpositionen hält.This is one of the position of the armature in the end region the movement has essentially independent holding force, which holds the anchor in one of its end positions.
Eine derartige Anordnung kann vorteilhaft für beide Endpositionen des magnetisch aktiven Teils bzw. des Ankers realisiert sein.Such an arrangement can be advantageous for both end positions realized the magnetically active part or the armature his.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Spule bezüglich der Bewegungsbahn des magnetisch aktiven Teils eine zweite Spule gegenüberliegt, die mit einem 6A further advantageous embodiment of the invention provides before that the coil with respect to the trajectory of the magnetic active part is opposite a second coil with a 6
Strom in demselben Richtungssinn wie die erste Spule beaufschlagbar ist.Current can be applied in the same direction as the first coil is.
Durch zwei in der dargestellten Weise kombinierte Spulen ist ein entsprechend größerer magnetischer Fluß erzeugbar, was zu einer größeren potentiellen Beschleunigung des Ankers führt.By two coils combined in the manner shown a correspondingly larger magnetic flux can be generated, resulting in leads to a greater potential acceleration of the anchor.
Außerdem kann vorgesehen sein, daß die erste und die zweite Spule in Bewegungsrichtung des Ankers gegeneinander versetzt sind.It can also be provided that the first and the second Coil offset against each other in the direction of movement of the armature are.
Durch einen derartigen Versatz der Spulen in Bewegungsrichtung des Ankers gegeneinander kann ein bestimmtes Beschleunigungsprofil entlang der Bewegungsbahn erreicht werden.By such an offset of the coils in the direction of movement the anchor against each other can have a certain acceleration profile can be reached along the trajectory.
Es kann auch vorgesehen sein, daß jede der Spulen für jeweils eine der Bewegungsrichtungen des Ankers genutzt wird.It can also be provided that each of the coils for each one of the directions of movement of the armature is used.
Außerdem kann vorteilhaft vorgesehen sein, daß zwei Jochkörper vorgesehen sind, die einander bezüglich der Bewegungsbahn des magnetisch aktiven Teils gegenüberliegen und die zwischen sich Luftspalte bilden, die wenigstens teilweise von der Bewegungsbahn des magnetisch aktiven Teils durchsetzt sind.In addition, it can advantageously be provided that two yoke bodies are provided, each other with respect to the trajectory opposite of the magnetically active part and the between air gaps form, at least partially from the trajectory of the magnetically active part are penetrated.
Durch einen weiteren Jochkörper, der dem ersten Jochkörper bezüglich der Bewegungsbahn des magnetisch aktiven Teils gegenüberliegt, wird der magnetische Kreis sowohl für den Fluß durch die Spule als auch für den Fluß des magnetisch aktiven Teils in jeder der Endpositionen geschlossen, so daß jeweils eine große Kraftwirkung sowohl für die Beschleunigung als auch für die Haltekraft in den Endpositionen erreicht wird. 7Through another yoke body, the first yoke body with respect to the path of movement of the magnetically active part, becomes the magnetic circuit for both the flow through the coil as well as for the flow of the magnetically active Partially closed in each of the end positions, so that each a great force effect for both acceleration and is also achieved for the holding force in the end positions. 7
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, in der Steuerungseinrichtung mehrere aufladbare und fallweise gemeinsam oder alternativ mit der Spule verbindbare Ladekondensatoren vorgesehen sind.A further advantageous embodiment of the invention provides before, in the control device several rechargeable and occasionally jointly or alternatively connectable to the coil Charging capacitors are provided.
Die verschiedenen Ladekondensatoren können für unterschiedliche Schaltfälle (beispielsweise unterschiedliche Belastungsfälle eines anzutreibenden Leistungsschalters) oder unterschiedlich für eine Ein- und Ausschaltung genutzt werden.The different charging capacitors can be used for different Switching cases (for example different load cases of a circuit breaker to be driven) or different can be used for switching on and off.
Die Erfindung bezieht sich außerdem auf ein Verfahren zum Betrieb eines magnetischen Linearantriebs, bei dem vorgesehen ist, daß die Spule zum Antrieb des Ankers in verschiedene Richtungen jeweils mit einem Strom gleicher Richtung beaufschlagt wird.The invention also relates to a method of operation of a magnetic linear actuator, in which provided is that the coil for driving the armature in different Each direction is charged with a current of the same direction becomes.
Gleich in welcher Endposition sich der Anker bzw. der magnetisch aktive Teil befindet, wird er bei Erzeugung eines magnetischen Flusses im Inneren der Spule zum Spuleninneren hin beschleunigt. Wird der Strom durch die Spule rechtzeitig unterbrochen, so bewegt sich der Anker bis zu der jeweils anderen Endposition. Dies vereinfacht die Ansteuerung der Spule beträchtlich.No matter in which end position the armature or the magnet active part, it will generate a magnetic Flow inside the coil towards the inside of the coil accelerated. If the current through the coil is interrupted in time, so the anchor moves to the other End position. This simplifies the control of the coil considerably.
Das erfindungsgemäße Verfahren kann vorteilhaft dadurch ausgestaltet werden, daß die Beaufschlagung mit einem Strom beendet wird, bevor das magnetisch aktive Teil seine Endposition erreicht hat.The method according to the invention can advantageously be designed as a result be that the application of a current ends before the magnetically active part reaches its end position has reached.
Eine weitere vorteilhafte Ausgestaltung sieht vor, daß der Stromfluß durch die Spule unterbrochen wird, sobald aufgrund eines elektrischen Schwingungsvorgangs die Speisespannung ihr Vorzeichen umkehrt. Another advantageous embodiment provides that the Current flow through the coil is interrupted as soon as due of an electrical oscillation process the supply voltage to her Sign reverses.
Da die Spule eine elektrische Induktivität sowie einen ohmschen Widerstand darstellt und im Normalfall durch eine Kapazität gespeist wird, ergibt sich ein elektrischer Schwingkreis in der Ansteuerung des Linearantriebs. Dies führt zur Entstehung einer elektrischen Schwingung, so daß die an der Spule anliegende Speisespannung irgendwann ihr Vorzeichen umkehrt.Because the coil has an electrical inductance as well as an ohmic Represents resistance and normally by a capacitance is fed, there is an electrical resonant circuit in the control of the linear drive. This leads to Generation of an electrical oscillation, so that at the Coil applied supply voltage reverses its sign at some point.
Dies würde eine Umkehrung des magnetischen Flusses bedeuten, was eine Umkehrung der magnetischen Kraftwirkung auf den magnetisch aktiven Teil bedeuten würde, die ungewollt ist. Daher wird vorteilhaft die Speisespannung überwacht und der Stromfluß durch die Spule unterbrochen, sobald die Speisespannung ihr Vorzeichen umkehrt.This would mean a reversal of the magnetic flux which is a reversal of the magnetic force effect on the magnetic active part that is unwanted. Therefore the supply voltage is advantageously monitored and the Current flow through the coil is interrupted as soon as the supply voltage their sign reverses.
Es kann auch vorteilhaft vorgesehen sein, daß der Stromfluß zu einem Ladekondensator umgeleitet wird, sobald die Speisespannung aufgrund eines elektrischen Schwingungsvorgangs ihr Vorzeichen umkehrt.It can also be advantageously provided that the current flow is diverted to a charging capacitor as soon as the supply voltage due to an electrical vibration process you Sign reverses.
Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels in einer Zeichnung gezeigt und anschließend beschrieben.The invention is described below using an exemplary embodiment shown in a drawing and then described.
Dabei zeigt
In der Figur 1 ist ein magnetischer Linearantrieb dargestellt,
mit einen Anker 1, der aus einem Stab 2 aus glasfaserverstärktem
Kunststoff und einem magnetisch aktiven Teil 3
aus einem dauermagnetischem Werkstoff besteht und an den an
einem Ende eine Schaltstange 4 angekoppelt ist, die nur schematisch
dargestellt und mit einem antreibbaren Schaltkontakt
5 der Unterbrechereinheit eines Hochspannungsleistungsschalters
verbunden ist. Der Linearantrieb erzeugt Bewegungen in
Richtung des Doppelpfeiles 6.1 shows a magnetic linear drive,
with an anchor 1 made of a
Der Anker 1 bewegt sich in dem Luftspalt 7 zwischen einem
ersten Jochkörper 8 und einem zweiten Jochkörper 9, die einander
bezüglich der Bewegungsbahn des Ankers 1 spiegelbildlich
gegenüberliegen.The armature 1 moves in the
Jeder der Jochkörper weist eine ringförmige Ausnehmung auf,
in die jeweils eine Spule 10, 11 eingebracht ist. Die Spulen
10, 11 sind jeweils mit elektrischen Anschlüssen versehen und
mittels einer Steuereinrichtung mit einem Strom beaufschlagbar.Each of the yoke bodies has an annular recess,
in each of which a
Wird wenigstens eine der Spulen 10, 11 mit einem Strom beaufschlagt,
so ist beispielsweise die Stromrichtung derart, daß
im oberen Teil der Spule 10 der Strom in die Zeichenebene
hineinläuft und im unteren Teil der Spule der Strom aus der
Zeichenebene heraustritt wie durch den Punkt 12 veranschaulicht
wird.If at least one of the
Hierdurch wird ein magnetischer Fluß in der Axialrichtung 34
erzeugt, der durch die Pfeile 13 dargestellt ist und der
durch einen ersten Kern 14 des ersten Jochkörpers 8 innerhalb
der Spule 10 und durch einen zweiten Kern 15 des zweiten
Jochkörpers 9 innerhalb der Spule 11 hindurchtritt. This causes a magnetic flux in the axial direction 34
generated, which is represented by the arrows 13 and the
by a
In der dargestellten Endposition des Ankers, in der dieser in
nicht dargestellter Weise an einem mechanischen Anschlag
ruht, tritt bereits ein Teil 16 des magnetischen Flusses 13
der Spulen 10, 11 durch einen Randbereich des magnetisch aktiven
Teils 3 des Ankers hindurch.In the end position of the anchor shown, in which it is in
not shown on a mechanical stop
is at rest,
Der übrige Teil des magnetischen Flusses 13 der Spulen 10, 11
muß den breiten Luftspalt zwischen den Kernen 14, 15 überwinden,
der durch den GFK-Körper des Ankers 1 nicht überbrückt
wird.The remaining part of the magnetic flux 13 of the
Demgemäß hat der magnetische Fluß die Tendenz, den magnetisch
aktiven Teil 3 in der Darstellung nach unten zu beschleunigen,
so daß der magnetische Fluß 13 der Spulen 10, 11 auf
einer möglichst großen Länge des magnetisch aktiven Teils 3
durch diesen hindurchtritt und antiparallel zu dem im Inneren
des magnetisch aktiven Teils 3 herrschenden magnetischen Fluß
17 verläuft.Accordingly, the magnetic flux tends to be magnetic
to accelerate
Wenn der magnetisch aktive Teil 3 etwa in der Mitte der Spulen
10, 11 angekommen ist, wird der Stromfluß durch die Spulen
10, 11 unterbrochen, um ein Abbremsen des magnetischen
Teils beim Austritt aus dem Fluß 13 der Spulen 10, 11 zu verhindern.When the magnetically
Der Anker bewegt sich aufgrund der dynamischen Energie weiter,
bis daß eine zweite, gestrichelt dargestellte Endposition
36 des magnetisch aktiven Teils 3 erreicht ist.The anchor keeps moving because of the dynamic energy,
until that a second, dashed
In dem Bewegungsbereich vor Erreichen der Endposition hat der
magnetische Fluß 17 innerhalb des magnetisch aktiven Teils 3
das Bestreben, über einen möglichst geringen Luftspalt in
einen der Jochkörper 8, 9 ein und aus diesem wieder auszutreten.In the range of motion before reaching the end position, the
Die auf den Anker in seinen Endpositionen wirkenden Haltekräfte werden anhand der in der Figur 1 dargestellten oberen Endposition beschrieben.The holding forces acting on the anchor in its end positions are based on the upper shown in Figure 1 End position described.
Wenn der Stromfluß durch die Spulen 10, 11 unterbrochen ist,
entfällt der magnetische Fluß 13.If the current flow through the
Ein Teil des magnetischen Flusses 17 im Inneren des magnetisch
aktiven Teils 3 kann unmittelbar in den Jochkörper 8
durch die Begrenzungsfläche 35 eintreten, wobei der Fluß über
den zweiten Jochkörper 9 unter Zwischenschaltung der unvermeidbaren
Luftspalte geschlossen wird, so daß von dort der
magnetische Fluß wieder in den magnetisch aktiven Teil 3 eintreten
kann.Part of the
Die Teile 18 des magnetischen Flusses in dem magnetisch aktiven
Teil 3, die in Höhe einer Spulenwicklung 10, 11 liegen,
müssen einen breiten Luftspalt überwinden, um in einen Jochkörper
8 einzutreten. Daher besteht in der dargestellten Konstellation
das Bestreben, den magnetisch aktiven Teil 3 weiter
nach oben zu bewegen, um eine möglichst große Überlappung
der Länge des magnetisch aktiven Teils 3 mit dem Teil des
Jochkörpers 8 oberhalb der Spule 10 zu erreichen.The
Die magnetische Kraftwirkung auf den Anker 1 ist hierbei
weitgehend unabhängig davon, wieweit der magnetisch aktive
Teil 3 mit dem Teil des Jochkörpers 8 oberhalb der Spule 10
bereits überlappt. Daher ist die Haltekraft auf den Anker in
der Endposition weitgehend unabhängig von mechanischen Toleranzen. The magnetic force on the armature 1 is here
largely regardless of how far the magnetically
Entsprechendes gilt für die andere, gestrichelt dargestellte Endposition des Ankers.The same applies to the other, shown in dashed lines End position of the anchor.
In der Figur 1 ist außerdem dargestellt, daß beide Jochkörper
8, 9 im Bereich der Kerne 14, 15 entlang der Bewegungsbahn
des magnetisch aktiven Teils derart profiliert sind, daß der
Luftspalt zwischen dem Anker 3 und den Jochkörpern 8, 9 nach
oben hin breiter wird. Dies bedeutet, daß die Kraftwirkung
auf den magnetisch aktiven Teil 3 während dessen Bewegungen
nach oben abnimmt. Auf diese Weise kann beim Ausschalten der
Unterbrechereinheit zum Anfang der Bewegung eine hohe Beschleunigung
und zu deren Ende hin eine schwächer werdende
Beschleunigung erreicht werden. Außerdem ist denkbar, daß
beispielsweise die zweite Spule 11 gegenüber der ersten Spule
10 nach unten entlang der Bewegungsbahn des Ankers 1 versetzt
ist, so daß bei einem Ausschaltvorgang, d. h. einer Bewegung
des Ankers 1 von unten nach oben, zunächst die zweite Spule
11 die Hauptlast der Beschleunigung tragen würde und später
die erste Spule 10.FIG. 1 also shows that both
Auch hierdurch läßt sich eine bestimmt Profilierung der Beschleunigung erreichen.This also allows a definite profiling of the acceleration to reach.
In der Figur 2 ist eine Ansteuerschaltung gezeigt, mit einem
Ladekondensator 19, der über einen ersten IGBT (insulatedgate
bipolar Transistor) 20 und einen zweiten IGBT 21 mit der
Spule 22 innerhalb des magnetischen Linearantriebs verbindbar
ist. Mit 23 ist der ohmsche Widerstand der Spule 22 und ihrer
Zuleitungen symbolisch bezeichnet.FIG. 2 shows a control circuit with a
Charging
Werden die IGBT's 20, 21 durchgeschaltet, so fließt ein Strom
durch die Spule 22 in Richtung des mit 24 bezeichneten Pfeiles.
Dieser fließt durch den ersten IGBT 20 und weiter entlang
der Pfeile 25, 26, 27.If the
Entlädt sich der Kondensator 19, so sinkt die Spannung an der
Spule 22 und es wird dort eine Gegenspannung induziert, die
bestrebt ist, die Stromstärke des Stromes 24 aufrecht zu erhalten.
Die Gegenspannung an der Spule 22 ist der Speisespannung
entgegengesetzt, so daß sich ein Spannungsnulldurchgang
ergibt. Zu diesem Zeitpunkt werden die IGBT's 21, 22 ausgeschaltet,
d. h. sie sperren den Strom.If the
Der durch die Spannung innerhalb der Spule 22 induzierte
Strom fließt über die Dioden 28, 29 in Richtung des Pfeiles
30 zu dem Kondensator 19 zurück und lädt diesen teilweise
wieder auf. Dadurch wird Energie beim Betrieb des Linearantriebs
gespart, was insbesondere dann von Bedeutung ist, wenn
ein mit diesem angetriebener Hochspannungsschalter im Notbetrieb
mittels Batterien betrieben werden muß.The induced by the voltage inside the
Die Figur 3 zeigt schematisch die Energieversorgung eines Linearantriebs
über drei unterschiedliche Ansteuerungseinheiten
31, 32, 33, von denen jede einen eigenen Ladekondensator aufweist,
wobei die Ladekondensatoren unterschiedliche Kapazitäten
haben können. Hierdurch wird für unterschiedliche Schaltfälle
jeweils eine unterschiedliche Energiemenge in Form von
in den Ladekondensatoren gespeicherter elektrischer Feldenergie
zur Verfügung gestellt.FIG. 3 shows schematically the energy supply of a linear drive
via three
Die unterschiedlichen Ansteuerungen 31, 32, 33 können auch
für schnell aufeinander folgende Aus-Ein-Aus-Schaltungen genutzt
werdenThe
Claims (11)
- Magnetic linear drive, in particular for an electrical switch, having a coil (10, 11) through which a current can be passed and in whose interior the current can produce a magnetic flux (13) in an axial direction (34), having an armature (1) which can move only at right angles to the axial direction (34) and which has a magnetically active part (3) whose movement path passes through an airgap (7) within a core (14, 15) which passes through the coil (10, 11), or passes one end face of the core (14, 15), with the magnetically active part (3) being demagnetized or magnetized in such a manner that the magnetic flux (17) runs parallel to the axial direction (34), or parallel to it but in the opposite direction, within the magnetically active part (3),
characterized in that
the magnetically active part can be positioned permanently in two limit positions, and can be moved from a first limit position to a second limit position by the influence of a current. - Magnetic linear drive according to Claim 1,
characterized in that
the magnetically active part (3) is magnetized, and in that, in at least one limit position of the magnetically active part (3), this part (3) is arranged at least partially in the region of a yoke body (8) which is arranged outside the coil, such that the magnetic flux (17) emerging from the magnetically active part (3), or entering it, passes at least partially directly through a boundary surface (35) of the yoke body facing the magnetically active part. - Magnetic linear drive according to one of Claims 1 or 2,
characterized in that
a second coil (11) is located opposite the coil (10) with respect to the movement path of the magnetically active part (3) and, together with the first coil (10), a current can be passed through it in the same direction sense as the first coil (10). - Magnetic linear drive according to Claim 1, 2 or 3,
characterized in that
the first coil (10) and the second coil (11) are offset with respect to one another in the movement direction of the armature (1). - Magnetic linear drive according to one of Claims 1 to 4,
characterized in that
two yoke bodies (8, 9) are provided, which are opposite one another with respect to the movement path of the magnetically active part (3) and form airgaps (7) between them, through which at least part of the movement path of the magnetically active part (3) passes. - Magnetic linear drive according to one of Claims 1 to 5 having a control device,
characterized in that
a number of energy-storage capacitors (19), which can be charged and can be connected jointly or alternatively to a coil on a case-by-case basis, are provided in the control device (31, 32, 33). - Method for operating a magnetic linear drive according to Claim 1,
characterized in that
the coil (10, 11) in each case has a current passed through it in the same direction
in order to drive the armature (1) in different directions. - Method according to Claim 7,
characterized in that
the passing of a current is ended before the magnetically active part (3) has reached its limit position. - Method according to Claim 8,
characterized in that
the current flow through the coil (10, 11) is interrupted as soon as the supply voltage changes its mathematical sign owing to an electrical oscillation process. - Method according to Claim 8,
characterized in that
the current flow is diverted to an energy-storage capacitor (19) as soon as the supply voltage changes its mathematical sign owing to an electrical oscillation process. - Method for operating a magnetic linear drive according to Claim 1,
characterized in that
first of all, a current is produced in the coil (10, 11), whose resultant magnetic flux in the coil (10, 11) is parallel to, but in the opposite direction to, any magnetization of the magnetically active part (3), provided this is magnetized, and in that, once the magnetically active part (3) has reached the location of the greatest magnetic field strength of the coil (10, 11) on its movement path, the current direction through the coil (10, 11) is reversed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19929572 | 1999-06-22 | ||
| DE19929572A DE19929572A1 (en) | 1999-06-22 | 1999-06-22 | Magnetic linear drive |
| PCT/DE2000/001981 WO2000079672A1 (en) | 1999-06-22 | 2000-06-20 | Magnetic linear drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1188222A1 EP1188222A1 (en) | 2002-03-20 |
| EP1188222B1 true EP1188222B1 (en) | 2003-05-02 |
Family
ID=7912818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00947808A Expired - Lifetime EP1188222B1 (en) | 1999-06-22 | 2000-06-20 | Magnetic linear drive |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6888269B1 (en) |
| EP (1) | EP1188222B1 (en) |
| CN (1) | CN1242534C (en) |
| AU (1) | AU6148600A (en) |
| DE (2) | DE19929572A1 (en) |
| WO (1) | WO2000079672A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178685A (en) * | 2013-03-04 | 2013-06-26 | 中国科学院国家天文台南京天文光学技术研究所 | Electromagnetic force actuator for active support of astronomical telescope mirror face |
| DE102013201084A1 (en) | 2013-01-24 | 2014-07-24 | Siemens Aktiengesellschaft | Electrical machine e.g. power converter has armature having layers, which is moved relative to stator and is connected to fitting, where armature and fitting are electrically isolated from each other |
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| US6497676B1 (en) | 2000-02-10 | 2002-12-24 | Baxter International | Method and apparatus for monitoring and controlling peritoneal dialysis therapy |
| DE10132553A1 (en) * | 2001-07-04 | 2003-01-23 | Siemens Ag | Electrodynamic linear drive |
| US7175606B2 (en) | 2002-05-24 | 2007-02-13 | Baxter International Inc. | Disposable medical fluid unit having rigid frame |
| US7153286B2 (en) | 2002-05-24 | 2006-12-26 | Baxter International Inc. | Automated dialysis system |
| US7238164B2 (en) | 2002-07-19 | 2007-07-03 | Baxter International Inc. | Systems, methods and apparatuses for pumping cassette-based therapies |
| DE10309697B3 (en) * | 2003-02-26 | 2004-09-02 | Siemens Ag | Magnetic linear drive |
| EP2368589B1 (en) | 2003-10-28 | 2016-08-03 | Baxter International Inc. | Apparatuses for medical fluid systems |
| GB0411802D0 (en) * | 2004-05-26 | 2004-06-30 | Electro Magnetic Rams Ltd | Switchgear system |
| EP1975960A1 (en) * | 2007-03-30 | 2008-10-01 | Abb Research Ltd. | A bistable magnetic actuator for circuit breakers with electronic drive circuit and method for operating said actuator |
| DE102007030391A1 (en) * | 2007-06-29 | 2009-01-02 | Siemens Ag | Manufacturing method for a ram and such a plunger |
| FR2934923B1 (en) * | 2008-08-11 | 2013-05-31 | Schneider Electric Ind Sas | HYBRID ELECTROMAGNETIC ACTUATOR WITH FIXED COIL |
| GB2467363A (en) * | 2009-01-30 | 2010-08-04 | Imra Europ S A S Uk Res Ct | A linear actuator |
| FR2943170B1 (en) * | 2009-03-10 | 2013-03-22 | Areva T & D Sa | MAGNETIC ACTUATOR CIRCUIT |
| EP2367189B1 (en) * | 2010-03-18 | 2013-09-04 | ABB Technology AG | Switch unit, and related method |
| US20150091677A1 (en) * | 2012-04-06 | 2015-04-02 | Hitachi, Ltd. | Gas Circuit Breaker |
| EP2840672A4 (en) * | 2012-04-18 | 2015-12-02 | Hitachi Ltd | Switchgear |
| CN105374584B (en) * | 2015-12-22 | 2017-09-05 | 福州大学 | Can quick acting, effectively buffering, the stable device for keeping or having magnetic suspension effect |
| CN105513844B (en) * | 2015-12-22 | 2018-04-13 | 福州大学 | Based on fault current energy and the quick electromagnetic tensile machine of change rate and its application |
| US11179516B2 (en) | 2017-06-22 | 2021-11-23 | Baxter International Inc. | Systems and methods for incorporating patient pressure into medical fluid delivery |
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|---|---|---|---|---|
| DE7432801U (en) | 1975-03-27 | Siemens Ag | Electromagnet with linear drive of the armature | |
| GB829782A (en) | 1956-03-23 | 1960-03-09 | Chausson Usines Sa | An electro-magnetically driven oscillating movement compressor |
| US3203447A (en) * | 1963-10-09 | 1965-08-31 | Skinner Prec Ind Inc | Magnetically operated valve |
| US3379214A (en) | 1965-01-15 | 1968-04-23 | Skinner Prec Ind Inc | Permanent magnet valve assembly |
| DE3376912D1 (en) | 1983-06-01 | 1988-07-07 | Ibm Deutschland | Electromagnetic driving element |
| US4817494A (en) * | 1987-04-06 | 1989-04-04 | The United States Of America As Represented By The United States Department Of Energy | Magnetic reconnection launcher |
| DE3942542A1 (en) * | 1989-12-22 | 1991-06-27 | Lungu Cornelius | BISTABLE MAGNETIC DRIVE WITH PERMANENT MAGNETIC HUBANKER |
| JP3121948B2 (en) | 1993-03-18 | 2001-01-09 | 河西工業株式会社 | Clip mounting seat |
| GB9409988D0 (en) * | 1994-05-18 | 1994-07-06 | Huntleigh Technology Plc | Linear magnetic actuator |
| US5729067A (en) * | 1995-08-30 | 1998-03-17 | Eaton Corporation | Method and apparatus for closed loop position control in a linear motor system |
| NL1006087C2 (en) | 1997-05-20 | 1998-11-23 | Bogey Venlo B V | Electromagnetic actuator drive for e.g. records |
-
1999
- 1999-06-22 DE DE19929572A patent/DE19929572A1/en not_active Ceased
-
2000
- 2000-06-20 EP EP00947808A patent/EP1188222B1/en not_active Expired - Lifetime
- 2000-06-20 CN CNB008092826A patent/CN1242534C/en not_active Expired - Fee Related
- 2000-06-20 DE DE50001984T patent/DE50001984D1/en not_active Expired - Fee Related
- 2000-06-20 AU AU61486/00A patent/AU6148600A/en not_active Abandoned
- 2000-06-20 US US10/018,845 patent/US6888269B1/en not_active Expired - Fee Related
- 2000-06-20 WO PCT/DE2000/001981 patent/WO2000079672A1/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013201084A1 (en) | 2013-01-24 | 2014-07-24 | Siemens Aktiengesellschaft | Electrical machine e.g. power converter has armature having layers, which is moved relative to stator and is connected to fitting, where armature and fitting are electrically isolated from each other |
| CN103178685A (en) * | 2013-03-04 | 2013-06-26 | 中国科学院国家天文台南京天文光学技术研究所 | Electromagnetic force actuator for active support of astronomical telescope mirror face |
| CN103178685B (en) * | 2013-03-04 | 2015-08-05 | 中国科学院国家天文台南京天文光学技术研究所 | For the electromagnetic type force actuator that astronomical telescope minute surface initiatively supports |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1188222A1 (en) | 2002-03-20 |
| CN1357166A (en) | 2002-07-03 |
| AU6148600A (en) | 2001-01-09 |
| CN1242534C (en) | 2006-02-15 |
| DE50001984D1 (en) | 2003-06-05 |
| WO2000079672A1 (en) | 2000-12-28 |
| US6888269B1 (en) | 2005-05-03 |
| DE19929572A1 (en) | 2001-01-04 |
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