EP1497839B1 - Elektromagnetischer betätiger mit dauermagnet - Google Patents

Elektromagnetischer betätiger mit dauermagnet Download PDF

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Publication number
EP1497839B1
EP1497839B1 EP03740622A EP03740622A EP1497839B1 EP 1497839 B1 EP1497839 B1 EP 1497839B1 EP 03740622 A EP03740622 A EP 03740622A EP 03740622 A EP03740622 A EP 03740622A EP 1497839 B1 EP1497839 B1 EP 1497839B1
Authority
EP
European Patent Office
Prior art keywords
coil
magnetic
permanent magnet
ring
actuator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03740622A
Other languages
English (en)
French (fr)
Other versions
EP1497839A1 (de
Inventor
Bertrand Gruson
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.)
Serac Group SAS
Original Assignee
Serac Group SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Serac Group SAS filed Critical Serac Group SAS
Publication of EP1497839A1 publication Critical patent/EP1497839A1/de
Application granted granted Critical
Publication of EP1497839B1 publication Critical patent/EP1497839B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets

Definitions

  • the present invention relates to a permanent magnet electromagnetic actuator.
  • No. 4,295,111 discloses an electromagnetic actuator comprising a coil disposed around a magnetic body in which a magnetic actuating member is mounted.
  • a permanent magnet is disposed around the coil and has a magnetization field extending in an axial direction of the coil.
  • the permanent magnet is interposed between two rings of magnetic material which are in contact with the magnetic body. This helps to focus the magnetic field and develop a significant force.
  • the stroke of the actuating member is relatively small and, for long strokes, it is necessary to increase the axial dimensions of the actuator.
  • an electromagnetic actuator comprising a coil, a magnetic actuator mounted in the coil, at least one ring of magnetic material disposed around the coil, and at least one permanent magnet attached to one end of the coil. ring and arranged facing an outer surface portion of the coil, the permanent magnet having a magnetization field extending in an axial direction of the coil, the magnetic actuating member being slidably mounted in an organ non-magnetic guide means extending in the coil and the ring having an end opposite to the magnet which is separated from the non-magnetic guide member by a non-magnetic gap.
  • the electromagnetic actuator comprises, in a manner known per se, a coil 1 fixed around a tube of non-magnetic material 2 in which a magnetic actuating member 3 is slidably mounted.
  • the coil 1 is connected by a feed wire 4 to unrepresented feed means for exciting or de-energizing the coil to manipulate the magnetic actuator.
  • a ring 5 forming a permanent magnet for example a ferrite ring whose permanent magnetization field extends in an axial direction of the ring, is arranged around the coil so as to extend facing the central portion of the outer surface of the coil.
  • the field generated by the ring 5 thus extends in an axial direction of the coil 1.
  • the ring 5 is framed by two rings 6 of magnetic material, for example mild steel.
  • annular plates 7 whose peripheral edge is in contact with the inner surface of the corresponding ring 6.
  • the annular plates 7 are pierced with a central orifice of diameter greater than the diameter of the nonmagnetic tube 2.
  • the magnetic rings 6 are thus separated from the nonmagnetic tube 2 by a non-magnetic gap.
  • the assembly is surrounded by an insulating casing 8, for example a molded casing which ensures a maintenance in place rings and end plates.
  • Part of the field lines resulting from the permanent magnet 5 extends in a loop as illustrated by a thin fine line in the figure so that, even in the absence of current as illustrated in the figure, the weight of the body magnetic actuation is partially compensated by the attractive force resulting from the permanent magnet.
  • the coil 1 During an excitation of the coil 1, it generates a complementary magnetic field which moves the magnetic actuating member 3 upwards.
  • the non-magnetic gap will be decreased or increased by using an annular plate with a smaller or larger central orifice.
  • the actuator according to the invention has been described with magnetic material plates 7 arranged at the ends of the coil, the actuator according to the invention can be produced without the plates 7.
  • the magnetic plate 7 can in addition to being replaced in whole or in part by a plate of non-magnetic material.
  • the invention has been illustrated in a symmetrical arrangement of the magnetic material rings 6 with respect to the permanent magnet 5, the geometry of the assembly can be modified in order to obtain a particular behavior of the actuator depending on the application to which the actuator is intended.
  • guide member has been described in the form of a tube, it may have other shapes and be made for example in the form of slides.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (3)

  1. Elektromagnetischer Aktuator, umfassend eine Spule (1), ein magnetisches Betätigungselement (3), das in der Spule gelagert ist, mindestens einen Ring (6) aus magnetischem Material, der um die Spule herum angeordnet ist, und mindestens einen Dauermagneten (5), der an einem Ende des Ringes angefügt und gegenüber einem Außenflächenabschnitt der Spule (1) angeordnet ist, wobei der Dauermagnet ein Magnetfeld hat, das sich gemäß einer axialen Richtung der Spule (1) erstreckt, dadurch gekennzeichnet, dass das magnetische Betätigungselement verschiebbar in einem nicht magnetischen Führungselement (2) gelagert ist, das sich in der Spule erstreckt, und dass der Ring ein dem Magneten entgegengesetztes Ende hat, das von dem nicht magnetischen Führungselement durch einen nicht magnetischen Zwischenraum getrennt ist.
  2. Elektromagnetischer Aktuator nach Anspruch 1, dadurch gekennzeichnet, dass der Dauermagnet ein Ring (5) ist, der die Spule umgibt.
  3. Elektromagnetischer Aktuator nach Anspruch 1, dadurch gekennzeichnet, dass der Dauermagnet (5) zwischen zwei Ringen (6) aus magnetischem Material eingefügt ist.
EP03740622A 2002-04-22 2003-04-16 Elektromagnetischer betätiger mit dauermagnet Expired - Lifetime EP1497839B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0204988 2002-04-22
FR0204988A FR2838863B1 (fr) 2002-04-22 2002-04-22 Actionneur electromagnetique a aimant permanent
PCT/FR2003/001213 WO2003090237A1 (fr) 2002-04-22 2003-04-16 Actionneur electromagnetique a aimant permanent

Publications (2)

Publication Number Publication Date
EP1497839A1 EP1497839A1 (de) 2005-01-19
EP1497839B1 true EP1497839B1 (de) 2006-06-14

Family

ID=28686234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740622A Expired - Lifetime EP1497839B1 (de) 2002-04-22 2003-04-16 Elektromagnetischer betätiger mit dauermagnet

Country Status (12)

Country Link
US (1) US6670876B2 (de)
EP (1) EP1497839B1 (de)
JP (1) JP2005535106A (de)
CN (1) CN100351959C (de)
AT (1) ATE330321T1 (de)
BR (1) BRPI0309070B8 (de)
DE (1) DE60306140T2 (de)
DK (1) DK1497839T3 (de)
ES (1) ES2265575T3 (de)
FR (1) FR2838863B1 (de)
PT (1) PT1497839E (de)
WO (1) WO2003090237A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060056993A1 (en) * 2004-09-14 2006-03-16 Moshe Gombinsky Magnetic spring actuator device
CN106224783B (zh) * 2016-09-08 2019-01-18 湖北工业大学 一种磁力驱动管道检测装置
US11448103B2 (en) * 2018-06-28 2022-09-20 Board Of Regents, The University Of Texas System Electromagnetic soft actuators

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295111A (en) * 1979-11-29 1981-10-13 Nasa Low temperature latching solenoid
JPH0134326Y2 (de) * 1981-04-22 1989-10-19
FR2792109B1 (fr) * 1999-04-12 2001-06-01 Schneider Electric Sa Electroaimant a circuit magnetique simplifie
FR2801579B1 (fr) * 1999-11-29 2002-01-18 Serac Group Bec de remplissage a debit reglable par un dispositif d'actionnement unique et procede de mise en oeuvre

Also Published As

Publication number Publication date
WO2003090237A1 (fr) 2003-10-30
DE60306140T2 (de) 2007-04-26
DE60306140D1 (de) 2006-07-27
US6670876B2 (en) 2003-12-30
CN1647219A (zh) 2005-07-27
PT1497839E (pt) 2006-11-30
BR0309070A (pt) 2005-02-01
JP2005535106A (ja) 2005-11-17
ES2265575T3 (es) 2007-02-16
DK1497839T3 (da) 2006-10-23
BRPI0309070B8 (pt) 2017-03-21
EP1497839A1 (de) 2005-01-19
CN100351959C (zh) 2007-11-28
ATE330321T1 (de) 2006-07-15
US20030197582A1 (en) 2003-10-23
FR2838863B1 (fr) 2004-06-25
FR2838863A1 (fr) 2003-10-24
BRPI0309070B1 (pt) 2016-10-18

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