WO2014095272A1 - Actionneur à courants de foucault - Google Patents

Actionneur à courants de foucault Download PDF

Info

Publication number
WO2014095272A1
WO2014095272A1 PCT/EP2013/074783 EP2013074783W WO2014095272A1 WO 2014095272 A1 WO2014095272 A1 WO 2014095272A1 EP 2013074783 W EP2013074783 W EP 2013074783W WO 2014095272 A1 WO2014095272 A1 WO 2014095272A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
switching element
eddy current
designed
actuator according
Prior art date
Application number
PCT/EP2013/074783
Other languages
German (de)
English (en)
Inventor
Thomas Friedrich
Stephan Loosen
Anton Paweletz
Christof BITTNER
Hermann Bamberger
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2014095272A1 publication Critical patent/WO2014095272A1/fr

Links

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
    • 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
    • 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
    • H01H3/222—Power arrangements internal to the switch for operating the driving mechanism using electrodynamic repulsion

Definitions

  • the invention relates to an eddy current actuator according to the preamble of independent claim 1.
  • Eddy current based impact actuators are used, inter alia, in the metal forming technique for plastic (thermoplastic), "explosive" machining and shaping of small metallic design elements with elaborate geometries to achieve a mechanical stress that allows the plastic deformation of metal,
  • Very high currents are impressed in the specially designed excitation coils of the actuators (the current densities reach several hundred A / mm 2 ) .
  • the rapidly changing currents in turn induce very dynamic eddy currents in the metal to be processed, which interact with the magnetic field of the excitation current together and form a very high repulsive impulse force, which is capable of deforming the small workpiece located there with a corresponding design of the tool mold.
  • the temporal courses of these excitation currents have a pulse-like character and i In comparison to their working period a very short duration.
  • the magnetic field of the excitation coil can briefly reach values above 10T.
  • DE 10 2010 002 900 A1 describes an actuator and a method for controlling an actuator for adapting a stiffness of a deformation element for adaptive crash structures in a vehicle.
  • the actuator is designed as an eddy current actuator with an eddy current drive and comprises an annular control element, which is designed as an armature of the Wrtelstromantriebs.
  • DE 10 201 1017 512 A1 describes a device with adjustable stiffness for absorbing impact energy and a method for setting a rigidity of such a device.
  • the device described comprises a Wrbelstromaktuator having a Wrbelstrom drive with a bolt-shaped actuator, which is designed as an armature of the eddy current drive. Disclosure of the invention
  • the Wrbelstromaktuator invention with the features of independent claim 1 has the advantage that an improvement in the Wrkstromstu of the Wrbelstromaktuators can be achieved.
  • the different materials can be selected purposefully depending on the function to be performed.
  • the switching element this means that the Wrbelstrom bin does not matter because this function is represented by the anchor, so that no electrically conductive material must be used.
  • the anchor this means that the rigidity or stability of the material plays only a minor role, since the switching element takes over the switching function and the corresponding mechanical stress.
  • the possible weight savings can have a positive effect on the actuation speed or the dynamics of the rbelstromaktuators.
  • the possible reduction of the actuation voltage with the same demands on the movement of the eddy current actuator can have a positive effect on the costs of the power electronics.
  • the essence of the invention consists in the division of both the functions and the components “switching element” and “armature of the Wrbelstromantriebs” on two components. This makes it possible in an advantageous manner, the moving mass of the
  • the armature can be designed, for example, as a copper component. Since the switching element does not have to be made of an electrically conductive material, lighter materials such as, for example, suitable plastics may be used for the switching element as long as the material used meets the thermal and / or mechanical requirements. Thus, the division of the function of this entire component is completed. The switching element takes over the task of the actuating element, which has the necessary dimensions and carry loads occurring
  • the armature is made of an electrically conductive material and is part of the eddy current drive but does not perform any switching function or other mechanical functions.
  • the electrically conductive anchor the eddy currents form, which allow the Aktu michs free.
  • Embodiments of the present invention provide a Wrlawstromaktua- gate with a Wrtelstromantrieb comprising an excitation coil and an armature made of an electrically conductive material, wherein a magnetic field generated in the excitation coil moves the armature based on the eddy current effect of the exciting coil.
  • the movable armature transfers a switching element from a starting position into at least one switching position, the switching element and the armature being made of different materials.
  • the switching element is meant the element which performs the function of providing various states.
  • the electrically conductive armature is part of the eddy current drive, which converts the switching element into different states. In the case play of the switch are possible in the positions “switch closed” and “switch open”.
  • Embodiments of the present invention provide an eddy current actuator with a switching element that can be used in various applications.
  • the term eddy current actuator comprises both the components switching element and armature made of an electrically conductive material, as well as other parts such as exciter coil, capacitor, electrical circuit, housing, guides, etc. as well as other parts that are required to illustrate the function.
  • the measures and refinements recited in the dependent claims advantageous improvements of the independent claim 1 sensor unit for a vehicle are possible.
  • the armature can be in loose contact with the switching element.
  • This embodiment of the invention is not limited to the functional separation of the switching element and armature, ie actuator and drive element, but also refers to the structural separation of these two components of the eddy current actuator. Because if you carry out the components so that they are not connected to each other, but in loose contact with each other, then the efficiency can be further increased. Experiments have shown that with the same dimensions and boundary conditions, an increase in the efficiency can result in a tenfold value, which positively influences the dynamics of the invention Wrbelstromaktuators.
  • the anchor can be firmly connected to the switching element.
  • a hybrid component is used, which consists of the light switching element, to which the electrically conductive anchor is adhered.
  • the armature can be designed, for example, as a ring or as a membrane or as a disk.
  • the corresponding switching element can be designed, for example, as a ring or as a bolt or as a disk.
  • a spring element can be provided, which converts the switching element into the starting position when the Wrbelstrom drive is deactivated.
  • the exciter coil can be designed, for example, as a flat coil or microcoil in order to be able to optimally utilize an existing installation space.
  • FIG. 1 is a schematic block diagram of one embodiment of the invention
  • FIG. 2 shows a schematic sectional illustration of a first exemplary embodiment of a heat-current actuator according to the invention.
  • FIG. 3 shows a schematic sectional illustration of a second exemplary embodiment of an eddy current actuator according to the invention.
  • Fig. 4 shows a schematic sectional view of a third amongsbe game of a Wirbelstromaktuators invention.
  • an actuator arrangement 1 comprises an evaluation and control unit 3, at least one sensor unit 5 and a vibration current actuator 10 according to the invention.
  • the evaluation generates depending on physical quantities which the at least one sensor unit 5 detects and control unit 3 corresponding activation signals for activating the Wrbelstromaktuators 10 according to the invention
  • the evaluation and control unit 3 for example, uses a speaking dimensioned capacitor, not shown, whose electrical energy is converted into electromagnetic energy of the eddy current actuator.
  • the eddy current actuator 10, 10a, 10b, 10c comprises an eddy current drive 20, which has an exciter coil 22, 22a, 22b, 22c and an armature 24, 24a, 24b, 24c made of an electric current includes conductive material.
  • the excitation coil 22 generates a corresponding magnetic field in response to a drive signal of the evaluation and control unit 3, which moves the armature 24, 24 a, 24 b, 24 c away from the exciter coil 22, 22 a, 22 b, 22 c based on the Wrbel current effect.
  • the movable armature 24, 24a, 24b, 24c transfers a switching element 12, 12a, 12b, 12c from a starting position into at least one switching position, the switching element 12, 12a, 12b, 12c and the armature 24, 24a, 24b, 24c consist of different materials.
  • the switching element 12, 12a, 12b, 12c are each designed as a plastic component, and the armature 24, 24a, 24b, 24c is designed as a copper component.
  • the switching element 12, 12a, 12b, 12c can also be made of a different material, as long as the thermal and mechanical requirements are met.
  • Other suitable electrically conductive materials can also be used to produce the armature 24, 24a, 24b, 24c.
  • an unrepresented spring element can be provided, which transfers the switching element 12, 12a, 12b, 12c to the starting position when the eddy current drive 20 is deactivated.
  • the excitation coil 22, 22a, 22b, 22c designed as a flat coil or microcoil.
  • the switching element 12a and the armature 24a in the illustrated first embodiment are each designed as a ring. To reduce the moving mass and from the consideration that only a small anchor thickness for the Wrbelstrom bin is required because the
  • the switching element 12a is designed as a plastic ring, which is firmly connected to the designed as a copper ring armature 24a.
  • the executed as a copper ring armature 24a for example, be glued to the ring designed as a plastic switching element 12a.
  • the designed as a plastic ring switching element 12a has the required dimensions and can carry loads occurring, but is not part of the eddy current drive 20.
  • the executed as a copper ring armature 24a is part of the Wrbelstrom drive 20 of the Wrbelstromaktuators 10a and exercises no switching function or other mechanical function. In the armature 24a designed as a copper ring, the eddy currents are pronounced, which cause the
  • the switching element 12b, 12c is in each case designed as a pin protruding from a disk, and the armature 24b, 24c is in each case designed as a diaphragm or disk.
  • the armature 24b, 24c for reducing the moving mass and out of the consideration that only a small armature thickness for the Wrbelstrom bin is required because the penetration depth of the Wrbelströme is low, each exemplified as a copper membrane or copper disc.
  • the switching element 12b, 12c is carried out by way of example as a plastic bolt.
  • the armature 24b designed as a copper diaphragm or copper disc is firmly connected in the illustrated second exemplary embodiment to the switching element 12b designed as a plastic bolt.
  • the armature 24c designed as a copper diaphragm or copper disk can be glued onto the switching element 12b designed as a plastic bolt.
  • the armature 24c designed as a copper diaphragm or copper disk and the switching element 12c designed as a plastic bolt. Due to the loose contact between the armature 24c and the switching element 12c, the degree of rotation of the Wrebelstromaktuators 10c can be further increased.
  • the switching element 12b, 12c designed as a plastic bolt has the required dimensions and can carry any loads occurring, but is not part of the current drive 20.
  • the designed as a copper membrane or copper disc anchor 24b, 24c is part the eddy current drive 20 of the eddy current actuator 10b, 10c and performs no switching function or other mechanical function.
  • the armature 24b, 24c designed as a copper diaphragm or copper disk, the eddy currents form, which make possible the actuation effect.
  • Embodiments of the present invention provide a heat flow actuator which advantageously has improved efficiency through the functional and component isolation of the switching element and armature.
  • the improved efficiency has a positive effect on the Aktuleiters foi or the dynamics and by the possible reduction of the Aktu michsmiss with the same requirements for the movement on the cost of power electronics.
  • Embodiments of the inventive heat flow actuator can be used, for example, in devices with adjustable stiffness for absorbing impact energy.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

L'invention concerne un actionneur à courants de Foucault (10), comprenant un entraînement à courants de Foucault (20) équipé d'une bobine excitatrice (22) et d'une armature (24) en matériau ferromagnétique. Un champ magnétique généré dans la bobine excitatrice (22) déplace l'armature (24) sous l'action de l'effet de Foucault de la bobine excitatrice (22). Selon l'invention, l'armature mobile (24) fait passer un élément de commutation (12) d'une position de départ à au moins une position de commutation. L'élément de commutation (12, 12a, 12b, 12c) et l'armature (24, 24a, 24b, 24c) sont constitués de matériaux différents.
PCT/EP2013/074783 2012-12-21 2013-11-26 Actionneur à courants de foucault WO2014095272A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012224277.5 2012-12-21
DE201210224277 DE102012224277A1 (de) 2012-12-21 2012-12-21 Wirbelstromaktuator

Publications (1)

Publication Number Publication Date
WO2014095272A1 true WO2014095272A1 (fr) 2014-06-26

Family

ID=49674299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/074783 WO2014095272A1 (fr) 2012-12-21 2013-11-26 Actionneur à courants de foucault

Country Status (2)

Country Link
DE (1) DE102012224277A1 (fr)
WO (1) WO2014095272A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10224742B2 (en) 2015-01-18 2019-03-05 Powerpath Technologies Incorporated High efficiency uninterruptible power supply with near loss-less ultrafast electromechanical switching

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11348751B2 (en) 2018-12-18 2022-05-31 Eaton Intelligent Power Limited Electrical switching apparatus, and Thomson coil actuator and disc member therefor

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024995A1 (fr) * 1979-09-04 1981-03-11 The Bendix Corporation Actionneur électromagnétique à solénoide
US4272661A (en) * 1978-03-09 1981-06-09 Gould Inc. High speed vacuum interrupter
DE3343060A1 (de) * 1983-11-29 1985-06-05 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Anker fuer ein magnetventil
US5546063A (en) * 1994-06-17 1996-08-13 United States Defense Research, Inc. Magnetic field solenoid
DE19722013A1 (de) * 1997-05-27 1998-12-03 Steingroever Magnet Physik Magneto-mechanisches Kraftsystem
DE20114466U1 (de) * 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE10260668A1 (de) * 2002-12-23 2004-07-01 Fev Motorentechnik Gmbh Ankerelement für einen elektromagnetischen Aktuator mit wirbelstromarmer Ankerplatte
US20050230649A1 (en) * 2004-04-19 2005-10-20 Burkert Werke Gmbh & Co. Kg Magnetic drive for a valve
WO2008139250A1 (fr) * 2007-05-16 2008-11-20 Kulygin, Viktor Ivanovych Organe de commande électrique combiné
DE102008063689A1 (de) * 2008-12-19 2010-07-01 Kendrion Magnettechnik Gmbh Elektromagnet mit Permanentmagnet
WO2011003547A1 (fr) * 2009-07-05 2011-01-13 Kendrion Magnettechnik Gmbh Actionneur électrodynamique
WO2011128516A1 (fr) * 2010-04-15 2011-10-20 Schneider Elect4Ic Industries Sas Dispositif de commutation electrique a mecanisme d'actionnement ultra-rapide et interrupteur hybride comprenant un tel dispositif
DE102010032688A1 (de) * 2010-07-29 2012-02-02 Kendrion Magnettechnik Gmbh Elektromagnet mit Permanentmagnet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010002900A1 (de) 2010-03-16 2011-09-22 Robert Bosch Gmbh Aktuator und Verfahren zur Ansteuerung eines Aktuators zur Adaption einer Steifigkeit eines Deformationselements
DE102011017512A1 (de) 2011-04-26 2012-10-31 Robert Bosch Gmbh Vorrichtung mit einstellbarer Steifigkeit zum Aufnehmen von Aufprallenergie und Verfahren zum Einstellen einer Steifigkeit einer derartigen Vorrichtung

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272661A (en) * 1978-03-09 1981-06-09 Gould Inc. High speed vacuum interrupter
EP0024995A1 (fr) * 1979-09-04 1981-03-11 The Bendix Corporation Actionneur électromagnétique à solénoide
DE3343060A1 (de) * 1983-11-29 1985-06-05 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Anker fuer ein magnetventil
US5546063A (en) * 1994-06-17 1996-08-13 United States Defense Research, Inc. Magnetic field solenoid
DE19722013A1 (de) * 1997-05-27 1998-12-03 Steingroever Magnet Physik Magneto-mechanisches Kraftsystem
DE20114466U1 (de) * 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE10260668A1 (de) * 2002-12-23 2004-07-01 Fev Motorentechnik Gmbh Ankerelement für einen elektromagnetischen Aktuator mit wirbelstromarmer Ankerplatte
US20050230649A1 (en) * 2004-04-19 2005-10-20 Burkert Werke Gmbh & Co. Kg Magnetic drive for a valve
WO2008139250A1 (fr) * 2007-05-16 2008-11-20 Kulygin, Viktor Ivanovych Organe de commande électrique combiné
DE102008063689A1 (de) * 2008-12-19 2010-07-01 Kendrion Magnettechnik Gmbh Elektromagnet mit Permanentmagnet
WO2011003547A1 (fr) * 2009-07-05 2011-01-13 Kendrion Magnettechnik Gmbh Actionneur électrodynamique
WO2011128516A1 (fr) * 2010-04-15 2011-10-20 Schneider Elect4Ic Industries Sas Dispositif de commutation electrique a mecanisme d'actionnement ultra-rapide et interrupteur hybride comprenant un tel dispositif
DE102010032688A1 (de) * 2010-07-29 2012-02-02 Kendrion Magnettechnik Gmbh Elektromagnet mit Permanentmagnet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10224742B2 (en) 2015-01-18 2019-03-05 Powerpath Technologies Incorporated High efficiency uninterruptible power supply with near loss-less ultrafast electromechanical switching

Also Published As

Publication number Publication date
DE102012224277A1 (de) 2014-06-26

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