EP2056308A1 - Electroaimant de levage - Google Patents

Electroaimant de levage Download PDF

Info

Publication number
EP2056308A1
EP2056308A1 EP08018926A EP08018926A EP2056308A1 EP 2056308 A1 EP2056308 A1 EP 2056308A1 EP 08018926 A EP08018926 A EP 08018926A EP 08018926 A EP08018926 A EP 08018926A EP 2056308 A1 EP2056308 A1 EP 2056308A1
Authority
EP
European Patent Office
Prior art keywords
lifting magnet
magnet according
magnetically conductive
iron
armature
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.)
Granted
Application number
EP08018926A
Other languages
German (de)
English (en)
Other versions
EP2056308B1 (fr
Inventor
Daniel Dipl.-Ing. Brünkmans
Gregor Dipl.-Ing. Kleining
Josef Prof. Dr.-Ing. Elsbrock
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.)
Uni-Gerate E Mangelmann Elektrotechnische Fabrik GmbH
Original Assignee
Uni-Gerate E Mangelmann Elektrotechnische Fabrik 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 Uni-Gerate E Mangelmann Elektrotechnische Fabrik GmbH filed Critical Uni-Gerate E Mangelmann Elektrotechnische Fabrik GmbH
Publication of EP2056308A1 publication Critical patent/EP2056308A1/fr
Application granted granted Critical
Publication of EP2056308B1 publication Critical patent/EP2056308B1/fr
Not-in-force 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

Definitions

  • the invention relates to a lifting magnet, comprising a cup-shaped magnetic body made of solid iron, a magnet armature and at least one exciting coil.
  • Parasitic regions are formed by magnetically non-conductive media, such as air, gases, or non-conductive solids, such as plastic, cardboard, or the like, integrated into a solenoid.
  • the parasitic areas created by such media / solids result in less overall magnetic flux through the iron loop of the electromagnetic system. Frequently, such parasitic areas can not be avoided due to the production, in particular if prefabricated starting materials are used in the production of the magnets, in particular lifting magnets, which lead to gaps or cavities between the individual components.
  • the invention is based on a in the DE 10 2004 023 905 A1 described, referred to as cup magnets lifting magnet, in which the substantial magnetic flux passes through an iron circle, which consists of a cup-shaped yoke with integrated armature counterpart and an anchor.
  • the magnetic flux is weakened in conventional electromagnetic actuators in the form of solenoids substantially by the unavoidable air gaps, so that it is endeavored to reduce the size of the air gaps to a minimum in order to maximize the magnetic To get river.
  • an armature guide tube is centrally inserted into the excitation coil, which is at least partially formed of a magnetically conductive material, wherein the permeability of the armature guide tube is at least partially smaller than the permeability of the cup-shaped yoke, the immovable armature counterpart and the movable armature.
  • the starting point is a tube which has previously been homogeneously magnetically well-conducting and which must be subjected to a heat treatment followed by rapid (shock) cooling.
  • the coil yoke consists of a potting compound with magnetic properties in which the excitation coil is embedded.
  • the potting compound is preferably made of epoxy resin or other plastic, in the magnetic particles or fillers, such as iron filings, are evenly distributed. Such a potting compound results in deteriorated efficiency as compared with a pot-type solid iron yoke.
  • the invention has for its object to take measures to optimize solenoids by avoiding the losses resulting from "parasitic" areas or at least largely reduced.
  • the invention provides that these parasitic areas are filled or replaced completely or at least partially by magnetically conductive materials depending on the technical feasibility and without affecting the required electrical insulation and protection.
  • the magnetically conductive materials can be both in solid form, such as in the form of iron powder (iron is hereinafter always synonymous with magnetically conductive materials), ideally with very small particle sizes below 5 microns (which allows filling of the parasitic regions to approximately 100% ), massive iron sheets, iron filings or the like, as well as in liquid form, such as magnetorheological fluids or ferrofluids.
  • the aggregate state of the potting compound increases with the solids content in the potting compound of a low viscosity at e.g. 50 vol .-% steadily and is similar to just under 95 vol .-% of a paste.
  • the concentration of the iron particles in the potting compound therefore depends on the one hand on the initial viscosity (carrier medium without mixed iron particles), (the lower the initial viscosity of the carrier medium, the more solids can be mixed) as well as on the individual application area by estimating whether the magnetic potting compound still has to be independently flowable, or whether it is also used in the form of a paste with high viscosity [but also a high iron content] by pressing into the air gap.
  • An advantageous possibility of reducing the magnetic resistances in the parasitic regions is the use of a magnetically highly conductive paste of, for example, a mixture of oil as a carrier fluid and iron powder in a high concentration to make the resulting paste homogeneous magnetic conductive by intensive mixing.
  • this paste does not cure, but in some applications is more suitable than a potting compound that hardens after filling the parasitic areas.
  • the in FIG. 1 shown lifting magnet consists of a substantially cup-shaped magnetic body (1) made of solid iron, a Magneterregerspule 3 and a movable armature 6 in the axial direction, as part of the magnetic body 1 is an axially aligned armature 3 armature counterpart 1.1 also made of solid iron. Between the armature counterpart 1.1 and the armature 6 is a bridge 4 made of non-magnetic, ie non-magnetic material. The bridge 4 forms a generally tubular guide element for the armature 6 in the working air gap 5. For pressure equalization, the armature counterpart 1.1 is provided in each case with a connected to the working air gap 5 pressure equalization hole 1.2.
  • FIGS. 2 to 11 represented elements representing the representation of FIG. 1 correspond, have the same reference numerals.
  • the known solenoid according to FIG. 1 contains parasitic regions 2 in the form of air gaps and / or antimagnetic substances between the iron circuit 1, 11 and 6 and the exciter coil. 3
  • the in FIG. 2 Lifting magnet shown consists of a solid iron cup-shaped magnetic body 1 including the armature counterpart 1.1, the armature 6 and the excitation coil 3, which is wound on a non-magnetic coil carrier 7, which is also effective as a bridge between the armature counterpart 1.1 and the movable armature 6.
  • the according to FIG. 1 existing air gaps are thus eliminated by the bobbin 7 and the filling 9.
  • FIG. 3 Lifting magnet shown consists of a cup-shaped magnetic body 1 including armature counterpart 1.1, the armature 6, the excitation coil 3 and a bridge 4.
  • the according to FIG. 1 existing air gaps around the exciter coil 3, that is, the parasitic regions take a filling 9 of magnetically conductive material.
  • the in FIG. 4 Lifting magnet shown consists of a static magnetic body 1 including armature counterpart 1.1, an armature 6, an excitation coil 3 and a bridge 4.
  • the adjoining the working air gap 5 pressure equalization hole 1.2 opens into a
  • the working air gap 5, the pressure equalization bore 1.2 and the pressure equalization chamber 8.1 contain a filling of magnetically conductive material, such as a ferrofluid or a magnetorheological fluid with optionally mixed iron powder or a magnetically conductive paste.
  • the solid iron body 1 consisting of solid iron is designed so that parasitic areas, for example in the form of air gaps, are substantially absent, except for the working air gap 5 between the armature 6 and the armature core counterpart 1.1, which according to the embodiment of FIG. 5 is connected via the pressure equalization hole 1.2 to a sealed by a membrane 8 pressure equalization chamber 8.1.
  • the inherently parasitic regions of the working air gap 5, the bore 1.2 and the pressure equalization chamber 8.1 contain a filling of magnetically conductive material.
  • Solenoid 1 including armature counterpart 1.1, both consisting for example of a magnetically conductive Vergusskapselung, an armature 6 and a coil carrier 7.
  • armature counterpart 1.1 both consisting for example of a magnetically conductive Vergusskapselung, an armature 6 and a coil carrier 7.
  • the bore 1.2 1.2 in the armature counterpart 1.1 and Pressure Compensating Chamber 8.1 receives a flowable filling of magnetically conductive material.
  • the solenoid according to FIG. 9 is made of solid iron, static magnetic body 11 is reduced to a cover 11.2 and the dynamic armature 6 opposite armature counterpart 11.1, which has a working air gap 5 with the pressure equalization chamber 8.1 connecting bore 11.12; the rooms 5, 8.1 and 11.12 take up a magnetically conductive, flowable filling.
  • the field coil 3 is wound onto a coil carrier 7 and embedded in a parasitic areas excluding pot 12 of magnetically conductive material, for example, preferably in the form of a potting compound with admixed iron solids, wherein the rigid potting compound is formed by curing a suitable fluid.
  • FIG. 10 is the existing solid iron, static magnetic body 11 on a dynamic magnetic core or armature 6 opposite magnetic core counterpart 11.1 and a lid 11.2 reduced.
  • the excitation coil 3 is wound onto a bobbin 7 and according to the present invention of a parasitic areas excluding pot 12 according to FIG. 9 surrounded by magnetically conductive material. It lacks here a pressure equalization chamber and the filling of the working air gap 5 and the bore 11.1 with magnetically conductive material.
  • the static magnetic body 11 consisting of solid iron is reduced to a cover 11.2, an armature counterpart 11.1 and a bottom section 11.3.
  • the wound on a bobbin 7 exciter coil 3 is surrounded by a cylinder 13 of magnetically conductive material, preferably in the form of a potting compound with admixed iron solids, said rigid potting compound is formed by curing a suitable fluid.
  • the magnetic efficiency considered here is independent of the switch-on time.
  • the magnetic efficiency is defined as the quotient of the mechanically usable energy released in the stationary case to the ideally converted final energy.
  • the magnetic efficiency also depends in particular on the size of the magnet system; For example, very small magnet systems usually have lower magnetic efficiencies than larger magnet systems, but this is independent of the actual optimization.
  • a magnetic efficiency of about 60% could be measured without application of the principle according to the invention, ie without optimization in the sense of the present invention.
  • the magnetic efficiency was 70%, i.
  • improved by 10 percentage points which corresponds to an efficiency improvement in the range of 16 to 17%.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • Electromagnets (AREA)
EP20080018926 2007-11-05 2008-10-30 Electroaimant de levage Not-in-force EP2056308B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710053005 DE102007053005A1 (de) 2007-11-05 2007-11-05 Hubmagnet sowie Verfahren zur Verbesserung des Wirkungsgrades von Hubmagneten

Publications (2)

Publication Number Publication Date
EP2056308A1 true EP2056308A1 (fr) 2009-05-06
EP2056308B1 EP2056308B1 (fr) 2013-09-18

Family

ID=40229763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080018926 Not-in-force EP2056308B1 (fr) 2007-11-05 2008-10-30 Electroaimant de levage

Country Status (2)

Country Link
EP (1) EP2056308B1 (fr)
DE (1) DE102007053005A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011006071A1 (de) 2011-03-24 2012-09-27 Ina - Drives & Mechatronics Gmbh & Co. Ohg Antriebseinrichtung für ein Ventil, Ventil zur Steuerung eines Gas- und/oder Flüssigkeitsstroms

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052177A1 (fr) 1980-11-15 1982-05-26 WABCO Westinghouse Fahrzeugbremsen GmbH Electrovanne
DE10139447A1 (de) 2001-08-10 2003-02-20 Conti Temic Microelectronic Spulenaufbau
DE102004023905A1 (de) 2004-05-13 2005-12-22 Bürkert Werke GmbH & Co. KG Elektromagnetische Betätigungseinrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239345A1 (de) * 1982-10-23 1984-04-26 bso Steuerungstechnik GmbH, 6603 Sulzbach Betaetigungsmagnet
US5955394A (en) * 1996-08-16 1999-09-21 Mobile Process Technology, Co. Recovery process for oxidation catalyst in the manufacture of aromatic carboxylic acids
DE19914020C1 (de) * 1999-03-19 2000-08-31 Siemens Ag Verfahren und Einrichtung zur Reduzierung der Geräuschemission an Wickelgütern

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052177A1 (fr) 1980-11-15 1982-05-26 WABCO Westinghouse Fahrzeugbremsen GmbH Electrovanne
DE10139447A1 (de) 2001-08-10 2003-02-20 Conti Temic Microelectronic Spulenaufbau
DE102004023905A1 (de) 2004-05-13 2005-12-22 Bürkert Werke GmbH & Co. KG Elektromagnetische Betätigungseinrichtung

Also Published As

Publication number Publication date
DE102007053005A1 (de) 2009-05-07
EP2056308B1 (fr) 2013-09-18

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