EP2133887B1 - Magnetischer Kreis mit zuschaltbarem Permanentmagnet - Google Patents

Magnetischer Kreis mit zuschaltbarem Permanentmagnet Download PDF

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Publication number
EP2133887B1
EP2133887B1 EP20090007666 EP09007666A EP2133887B1 EP 2133887 B1 EP2133887 B1 EP 2133887B1 EP 20090007666 EP20090007666 EP 20090007666 EP 09007666 A EP09007666 A EP 09007666A EP 2133887 B1 EP2133887 B1 EP 2133887B1
Authority
EP
European Patent Office
Prior art keywords
armature
coil
permanent magnet
magnetic circuit
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.)
Active
Application number
EP20090007666
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2133887A1 (de
Inventor
Andreas Rimbrecht
Sabine Krause
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.)
Kendrion (Donaueschingen/Engelswies) GmbH
Original Assignee
Kendrion (Donaueschingen/Engelswies) 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 Kendrion (Donaueschingen/Engelswies) GmbH filed Critical Kendrion (Donaueschingen/Engelswies) GmbH
Publication of EP2133887A1 publication Critical patent/EP2133887A1/de
Application granted granted Critical
Publication of EP2133887B1 publication Critical patent/EP2133887B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—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
    • 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
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

Definitions

  • the invention relates to a magnetic circuit having the features of the preamble of patent claim 1.
  • a solenoid with such a magnetic circuit is eg off DE 102 40 774 A1 that parallel US 2004/0201441 A1 and the DE 100 31 231 A1 known.
  • Magnetic circuits are known from the prior art, for example, from hinged armature magnets, rotary magnets or solenoids.
  • Known lifting magnets have a magnetic circuit with at least one energizable coil which is arranged on a pole core, at least one movable armature, a yoke for guiding the magnetic field and at least one permanent magnet.
  • the energizable coil is arranged circumferentially to the pole core and the movable armature, while the yoke closes the magnetic circuit between the poles of the energizable coil for guiding the magnetic field.
  • the known lifting magnet further comprises a return spring is provided which resets the armature in the currentless state of the coil in a starting position.
  • the permanent magnet is arranged in the magnetic circuit in the flow direction and thus amplifies the lifting force of the electromagnet formed by the magnetic circuit.
  • a disadvantage of the known arrangement is that the performance of magnetic circuits with a built-permanent magnet is only marginally better than without the permanent magnet, since a force component induced by the permanent magnet is permanently present and therefore the return spring and this amount must be more strongly dimensioned. In final defect so the force component of the permanent magnet is hardly usable.
  • the force component of the permanent magnet during a de-energized state of the coil is not involved in the magnetic circuits with and is directed only when current is applied to the coil in the magnetic circuit. It is thereby possible to use the force component of the permanent magnet almost completely.
  • the permanent magnet is in this case be arranged in the energized state of the coil in a magnetic short circuit, which is interrupted by energizing the coil.
  • a return spring which returns the armature, in the energized state of the coil to a starting position, may be dimensioned such that it only overcomes the weight of the armature as well as the resulting friction. The force component of the permanent magnet is thereby almost completely usable.
  • the armature In order to sound the permanent magnet in the magnetic circuit, the armature has a special contour.
  • the armature has for this purpose a step, which is formed is that it is arranged in the de-energized state of the coil by the return spring so that the short circuit for the permanent magnet is closed and that in the energized state of the coil, the position of the armature is changed such that the short circuit of the permanent magnet is interrupted and the field lines in the magnetic circuit of the coil are introduced.
  • the armature further comprises a control cone for adjusting the stroke force characteristic.
  • the permanent magnet may be formed, for example, as a bar magnet, which is arranged laterally and in the circumferential direction of the coil turns.
  • the orientation of the magnetic poles preferably takes place corresponding to the orientation of the magnetic field that can be generated by the coil.
  • a common yoke is provided for the magnetic circuit and the short circuit of the permanent magnet to direct the magnetic field lines.
  • the coil may for example be arranged on a coil carrier made of plastic, whereby an electrical insulation of the coil opposite in the coil core and the armature and a simple interchangeability of the coil is achieved. It is also possible to ensure by the coil support a smooth surface to adjacent components of the magnetic circuit.
  • the permanent magnet can also be enclosed in plastic on the top and bottom side or on a corresponding carrier to sit.
  • a corresponding carrier made of plastic for the permanent magnet By a corresponding carrier made of plastic for the permanent magnet, a defined orientation and a correct arrangement of the permanent magnet is ensured.
  • a magnetic circuit according to the invention is preferably used in a lifting magnet, for example in a triggering magnet.
  • FIG. 1 shows a magnetic circuit 10 in which a coil 11 is disposed about a pole core 12A and about an armature 12B movable along a longitudinal axis.
  • a yoke 13 is provided, which connects the magnetic poles of the coil.
  • a permanent magnet 14 is arranged, which is aligned such that the magnetic field of the permanent magnet 14 extends in the same direction to the magnetic field generated by the coil.
  • the armature 12 b is arranged in a remote from the pole core 12 a starting position.
  • a short circuit 20 for the magnetic field of the permanent magnet 14 is provided, which is closed by the armature 12b in the de-energized state of the coil. Since magnetic field lines always choose the path of the lowest magnetic resistance, the majority of the magnetic field generated by the permanent magnet 14 is directed via the short circuit 20, so that only a small force component in the direction of the pole core 12 a occurs.
  • FIG. 2 shows the magnetic circuit FIG. 1 with energized coil.
  • the armature 12 b is designed such that it has a stage 121 which is arranged such that it generates an air gap 22 in the short circuit when the coil 11 is energized, and thus the magnetic field lines of the permanent magnet 14 from the short circuit 20 into the magnetic circuit 10 with the coil 11 redirects. It is thus possible by a simple exemption in the contour of the armature 12 b to redirect the magnetic field lines in the magnetic circuit 10.
  • a transition between the pole core 12 a and the armature 12 b is also provided with a control cone 123 which serves to set a continuous control characteristic of the magnetic circuit 10.
  • FIG. 3 is the magnetic circuit 10 in a lifting magnet, as used for example in tripping magnets used.
  • the pole core 12a and the armature 12b are arranged in this embodiment on a plunger 18 which is fixedly connected to the armature.
  • a return spring 17 Between the pole core 12a and the armature 12b there is further arranged a return spring 17, which returns the armature 12a to the starting position with the short circuit 20 closed when the coil is not energized.
  • the Coil 11 is arranged concentrically and circumferentially to the pole core 12a and the armature 12b and is seated on a coil carrier 111 made of plastic.
  • the permanent magnet 14 is also surrounded on the upper side and lower side by plastic and is arranged below the coil 11 between the yoke 13 and a guide plate 15 for guiding the magnetic field lines.
  • the short circuit 20 in the lower part of FIG. 3 is like in the FIGS. 1 and 2 represented by the contour of the armature closable and openable whereby a strong magnetic field of the permanent magnet 14 by a relatively weakly dimensioned coil 11 is controllable.
  • FIG. 4 shows a plan view of a section along the line AA through the lifting magnet FIG. 3 ,
  • the arrangement of the permanent magnets 14 between the yoke 13 and the guide plate 15 can be seen particularly well.
  • the permanent magnets 14 are rod-shaped and are parallel to each other.
  • the centrally arranged and cylindrically shaped armature 12b with the concentrically arranged plunger 18 can be seen particularly well.
EP20090007666 2008-06-13 2009-06-10 Magnetischer Kreis mit zuschaltbarem Permanentmagnet Active EP2133887B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810028125 DE102008028125B4 (de) 2008-06-13 2008-06-13 Magnetischer Kreis mit zuschaltbarem Permanentmagnet

Publications (2)

Publication Number Publication Date
EP2133887A1 EP2133887A1 (de) 2009-12-16
EP2133887B1 true EP2133887B1 (de) 2013-05-29

Family

ID=41100538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090007666 Active EP2133887B1 (de) 2008-06-13 2009-06-10 Magnetischer Kreis mit zuschaltbarem Permanentmagnet

Country Status (2)

Country Link
EP (1) EP2133887B1 (un)
DE (1) DE102008028125B4 (un)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009043722A1 (de) * 2009-10-01 2011-04-07 Pierburg Gmbh Aktuator für eine Verbrennungskraftmaschine
CN101834052B (zh) * 2010-03-30 2011-11-23 浙江工业大学 无弹簧直动式高速开关电磁铁
DE102010025766B4 (de) * 2010-07-01 2012-07-12 Thomas Magnete Gmbh Bistabiler Hubmagnet
RU2461904C2 (ru) * 2010-07-13 2012-09-20 Российская Федерация, от имени которой выступает государственный заказчик - Государственная корпорация по атомной энергии "Росатом" Магнитная система привода
DE102010032688B4 (de) * 2010-07-29 2012-11-29 Kendrion (Donaueschingen/Engelswies) GmbH Elektromagnet mit Permanentmagnet
DE102011014192B4 (de) * 2011-03-16 2014-03-06 Eto Magnetic Gmbh Elektromagnetische Aktuatorvorrichtung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0134326Y2 (un) * 1981-04-22 1989-10-19
DE3242667T1 (de) * 1981-05-01 1983-05-05 Ledex, Inc., Vandalia, Ohio Schaltmagnet
US4845392A (en) * 1983-03-10 1989-07-04 Eaton Corporation Hybrid linear actuator
DE9116498U1 (un) * 1991-07-20 1992-11-19 Ralf Schrank Magnetfeldtechnik, 7770 Ueberlingen, De
DE4334031C2 (de) * 1993-10-06 1998-02-12 Kuhnke Gmbh Kg H Verfahren zum Betrieb eines bistabilen Hubmagneten und Hubmagnet zur Durchführung des Verfahrens
US6498416B1 (en) 1999-06-23 2002-12-24 Denso Corporation Electromagnetic actuator permanent magnet
CN1234135C (zh) * 2001-01-18 2005-12-28 株式会社日立制作所 电磁铁和使用该电磁铁的开关装置的操作机构
DE20114466U1 (de) 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
US7280019B2 (en) * 2003-08-01 2007-10-09 Woodward Governor Company Single coil solenoid having a permanent magnet with bi-directional assist

Also Published As

Publication number Publication date
EP2133887A1 (de) 2009-12-16
DE102008028125B4 (de) 2012-09-13
DE102008028125A1 (de) 2009-12-17

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