EP0408776A1 - Electro de levage - Google Patents

Electro de levage Download PDF

Info

Publication number
EP0408776A1
EP0408776A1 EP89113075A EP89113075A EP0408776A1 EP 0408776 A1 EP0408776 A1 EP 0408776A1 EP 89113075 A EP89113075 A EP 89113075A EP 89113075 A EP89113075 A EP 89113075A EP 0408776 A1 EP0408776 A1 EP 0408776A1
Authority
EP
European Patent Office
Prior art keywords
housing
magnet
pole piece
poles
winding
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.)
Withdrawn
Application number
EP89113075A
Other languages
German (de)
English (en)
Inventor
Valentin Georgiev Dipl.-Ing. Georgiev
Plamen Dimitrov Dipl.-Ing. Stoev
Zantscho Borissov Dipl.-Ing. Zanev
Stojan Delev Dipl.-Ing. Stojanov
Assen Georgiev Dipl.-Ing. Georgiev
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.)
P S P "METALSNAB"
P S P Metalsnab
Original Assignee
P S P "METALSNAB"
P S P Metalsnab
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
Priority to US07/378,297 priority Critical patent/US5038128A/en
Application filed by P S P "METALSNAB", P S P Metalsnab filed Critical P S P "METALSNAB"
Priority to EP89113075A priority patent/EP0408776A1/fr
Publication of EP0408776A1 publication Critical patent/EP0408776A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0231—Magnetic circuits with PM for power or force generation
    • H01F7/0252—PM holding devices
    • H01F7/0257—Lifting, pick-up magnetic objects
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/04—Means for releasing the attractive force
    • 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
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • H01F7/206—Electromagnets for lifting, handling or transporting of magnetic pieces or material
    • 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
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • H01F7/206—Electromagnets for lifting, handling or transporting of magnetic pieces or material
    • H01F2007/208—Electromagnets for lifting, handling or transporting of magnetic pieces or material combined with permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Definitions

  • the invention relates to a magnetic load holding device, that is to say a load magnet, which can be used in mechanical engineering for holding and conveying ferromagnetic materials.
  • a load magnet is already known from SU-A-1 082 744, in whose U-shaped housing made of magnetically soft material at least two pairs of permanent magnets are provided with control windings arranged on them. One magnet in each pair is neutralizing. One pole of the permanent magnets is in contact with the upper part of the U-shaped housing, the other poles with a common pole piece.
  • the known load magnet has a low load-bearing capacity due to large magnetic losses in the magnetic core, an increased consumption of electrical energy, the magnetic field penetrates deeply into the sheet material, the holding force for thin sheets is low and the demagnetization of the material and the regulation of the adhesive force are complicated and require high energy consumption.
  • the invention has for its object to provide a load magnet that has an increased load capacity has a reduced consumption of electrical energy, which is easy to produce, in which the magnetic field has a reduced depth of penetration, which has an increased adhesive force for thin sheets and in which for demagnetizing the material and regulating the holding force, the energy consumption is reduced and the Control is simplified.
  • the load magnet according to the invention has an increased load-bearing capacity and a reduced consumption of electrical energy. Manufacturing is simplified, the depth of penetration of the magnetic field into the material is reduced and the adhesive force for thin sheets is increased. For demagnetizing the material and regulating the adhesive force, the consumption of electrical energy is reduced and the control is simplified.
  • a housing 1 with a U-shaped cross section and made of magnetically soft material with which two pairs of permanent magnets 2, 3, 4 and 5 are in contact.
  • One permanent magnet 2, 4 of each pair i.e. the inner magnets, is one common neutralizing winding 6 surround, on both sides of which the permanent magnets 3, 5 of each pair are arranged.
  • the magnets 2, 3, 4 and 5 and a common pole piece 8 are surrounded by a magnetizing winding 7.
  • auxiliary poles 9 with a trapezoidal cross section.
  • the shorter base line of the trapezoid faces the magnetizing winding 7.
  • the poles of the housing 1 and the common pole piece 8 are provided with pairs of slots, an auxiliary winding 10 being inserted in each pair of slots.
  • the load magnet according to the invention works as follows:
  • the auxiliary windings are first switched on, which are dimensioned for short-term operation, the top plate 11 being detected.
  • the load magnet is raised and when a sheet 11 is separated from the others, the magnetizing winding 7 is switched on, so that the permanent magnets 2, 3, 4 and 5 are magnetized in one direction.
  • the auxiliary windings 10 are turned on. The magnetic flux closes as when lifting thick sheets, the auxiliary poles 9 reducing the magnetic resistance between the poles of the housing 1 with a U-shaped cross section and the pole piece 6, so that the holding force is also increased.
  • the holding force is difficult to regulate; Because of the steep demagnetization curve, the energy consumption is high. If a current flows through the auxiliary windings 10, the magnetic flux is summed in some regions of the pole and subtracted in others, so that the holding force can be changed over a wide range with reduced energy consumption. The operating point of the permanent magnets need not be changed, which simplifies the control circuit.
  • the sheets stick to the load magnet even after the permanent magnets have been neutralized.
  • the material is demagnetized if by the auxiliary windings 10 an alternating current is sent with a decaying amplitude.
EP89113075A 1989-07-17 1989-07-17 Electro de levage Withdrawn EP0408776A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US07/378,297 US5038128A (en) 1989-07-17 1989-07-11 Magnetic gripper
EP89113075A EP0408776A1 (fr) 1989-07-17 1989-07-17 Electro de levage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89113075A EP0408776A1 (fr) 1989-07-17 1989-07-17 Electro de levage

Publications (1)

Publication Number Publication Date
EP0408776A1 true EP0408776A1 (fr) 1991-01-23

Family

ID=8201632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113075A Withdrawn EP0408776A1 (fr) 1989-07-17 1989-07-17 Electro de levage

Country Status (2)

Country Link
US (1) US5038128A (fr)
EP (1) EP0408776A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008053864A1 (de) 2008-10-30 2010-11-25 Thyssenkrupp Millservices & Systems Gmbh Verfahren und Vorrichtung zum Aufnehmen, Heben und Transportieren von ferromagnetischen Bauteilen
EP2611569A1 (fr) * 2010-09-01 2013-07-10 Uttam Sarda Système porte-pièce électromagnétique à aimants permanents présentant un ou plusieurs solénoïdes additionnels positionnés dans le ou les pôles principaux de la face de travail

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680377A (en) * 1993-11-03 1997-10-21 International Business Machines Corporation Automated data storage library employing multi-direction picker with double lip gripper
US5748062A (en) * 1996-06-06 1998-05-05 Kirkpatrick; Jay Albert Fabricated electric lifting magnet
US5955935A (en) * 1998-04-06 1999-09-21 Geneva Steel Electromagnet design
FR2901524B1 (fr) * 2006-05-24 2008-07-18 Noel Blandon Systeme de securite pour un siege d'une installation de remontee mecanique et procede de mise en oeuvre
DE102008020235A1 (de) * 2008-04-22 2009-11-12 Ulma Packaging Technological Center, S. Coop Verpackungsmaschine mit Werkzeuganordnung
FR2937938A1 (fr) * 2008-11-05 2010-05-07 Sommital Installation de remontee mecanique
FR2969100B1 (fr) * 2010-12-17 2013-01-11 Sommital Siege de remontee mecanique avec verrouillage magnetique de garde-corps
KR101553168B1 (ko) * 2014-06-24 2015-09-14 최태광 잔류 자기를 최소화한 자성체 홀딩 장치
US10124341B2 (en) * 2014-09-22 2018-11-13 Liconic Ag Low-temperature storage device with cassette handler
CN105084193B (zh) * 2015-08-14 2017-01-11 江苏磁谷科技股份有限公司 一种可分张吸放的永磁起重装置及其控制方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1439547A1 (de) * 1964-12-15 1968-11-07 Steinert Elektromagnetbau Elektromagnetisches Geraet ohne Anker
SU1082744A1 (ru) * 1980-07-21 1984-03-30 Всесоюзный научно-исследовательский проектно-конструкторский и технологический институт кранового и тягового электрооборудования Магнитный захват

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1272488A (en) * 1969-08-12 1972-04-26 Geoffrey Richard Polgreen Improvements in and relating to magnets for holding and/or lifting loads
IT1022923B (it) * 1974-10-16 1978-04-20 Cardone Magneto Tecnica Apparecchiatura magnetica di ancoraggio
JPS6038845B2 (ja) * 1982-05-27 1985-09-03 三菱製鋼磁材株式会社 永久磁石式吸引装置
DE3423482C1 (de) * 1984-06-26 1985-11-14 Thyssen Edelstahlwerke AG, 4000 Düsseldorf Permanentmagnetische Lastgreif - oder Halteeinrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1439547A1 (de) * 1964-12-15 1968-11-07 Steinert Elektromagnetbau Elektromagnetisches Geraet ohne Anker
SU1082744A1 (ru) * 1980-07-21 1984-03-30 Всесоюзный научно-исследовательский проектно-конструкторский и технологический институт кранового и тягового электрооборудования Магнитный захват

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008053864A1 (de) 2008-10-30 2010-11-25 Thyssenkrupp Millservices & Systems Gmbh Verfahren und Vorrichtung zum Aufnehmen, Heben und Transportieren von ferromagnetischen Bauteilen
EP2611569A1 (fr) * 2010-09-01 2013-07-10 Uttam Sarda Système porte-pièce électromagnétique à aimants permanents présentant un ou plusieurs solénoïdes additionnels positionnés dans le ou les pôles principaux de la face de travail
EP2611569A4 (fr) * 2010-09-01 2014-05-14 Uttam Sarda Système porte-pièce électromagnétique à aimants permanents présentant un ou plusieurs solénoïdes additionnels positionnés dans le ou les pôles principaux de la face de travail

Also Published As

Publication number Publication date
US5038128A (en) 1991-08-06

Similar Documents

Publication Publication Date Title
DE2940212C2 (de) Magnetische Aufspannvorrichtung
DE2647503A1 (de) Magnettisch
DE3122064C2 (fr)
DE3123441C2 (fr)
DE3315682A1 (de) Winkelstellglied
EP0408776A1 (fr) Electro de levage
DE3125694A1 (de) Kollektorloser gleichstrommotor
DE3423482C1 (de) Permanentmagnetische Lastgreif - oder Halteeinrichtung
DE2721356C2 (fr)
DE2447363B2 (de) Elektrische schaltanordnung fuer ein geraet zum magnetisieren und entmagnetisieren von dauermagneten
DD222745A1 (de) Permanentmagneterregter laeufer fuer elektrische maschinen
DE3627648A1 (de) Gleichstrommagnet
DE2945269A1 (de) Positionierungseinrichtung fuer einen koerper
EP0144601A1 (fr) Tête de lecture pour l'exploration magnétique de fils Wiegand
DE2646784C3 (de) Dauermagnetische Haftplatte
DE3730975A1 (de) Magnetische feder und verfahren zum justieren
DE3246064A1 (de) Gleichstromlinearmotor
DE2938771A1 (de) Elektrisch-mechanischer wandler
DE2938749A1 (de) Energiewandler
DE4233524A1 (de) Vorrichtung zum bistabilen Setzen und Halten von Taststiften
DE1481751B2 (de) Elektro-Lasthebemagnet zur Handhabung von ferromagnetische!! Gegenständen, insbesondere von Blechen
DE2365314C3 (de) Magnetfeldbetätigte Schalteinrichtung
WO2019034745A1 (fr) Aimant d'adhérence
DE1265950B (de) Dauermagnetisches Haftsystem
DE916836C (de) Gleich- bzw. Wechselrichter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR GB IT

17P Request for examination filed

Effective date: 19910603

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19920108