EP0260387A1 - Procédé pour la fabrication d'un dispositif d'aimant et dispositif d'aimant ainsi obtenu - Google Patents

Procédé pour la fabrication d'un dispositif d'aimant et dispositif d'aimant ainsi obtenu Download PDF

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Publication number
EP0260387A1
EP0260387A1 EP87109000A EP87109000A EP0260387A1 EP 0260387 A1 EP0260387 A1 EP 0260387A1 EP 87109000 A EP87109000 A EP 87109000A EP 87109000 A EP87109000 A EP 87109000A EP 0260387 A1 EP0260387 A1 EP 0260387A1
Authority
EP
European Patent Office
Prior art keywords
magnet
pole shoes
pole
radius
cover plates
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.)
Ceased
Application number
EP87109000A
Other languages
German (de)
English (en)
Inventor
Karl Heinz Rivoir
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0260387A1 publication Critical patent/EP0260387A1/fr
Ceased 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
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0273—Imparting anisotropy
    • H01F41/028—Radial anisotropy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core

Definitions

  • the invention first relates to a method according to the preamble of claim 1.
  • DE-GM 6 75 00 56 it is known from DE-GM 6 75 00 56 to loosely lay the pole pieces of such a magnetic core and to form the cover plates as clamping pieces which are clamped to the pole pieces.
  • the disadvantage here is that either the inner surfaces of the pole shoes and the outer surfaces of the magnets have to be machined very precisely and the radii have to be matched to one another in order to achieve the full, full-surface contact of the pole shoe inner surfaces with the outer surface of the magnet, which is required for magnetic reasons .
  • Such exact machining is relatively expensive, in particular the exact machining of the outer surface of the magnet.
  • a magnet arrangement is known in which the inner magnet is in the form of a cuboid, while the pole shoes are in the form of a circular segment and in cross section are rectangular in the front view, this rectangle fitting to the corresponding flat counter surface of the cuboid magnet.
  • the magnet is pushed between them.
  • cover plates are placed, which are connected to the pole pieces (gluing or welding).
  • the subject of this prior publication initially does not meet the features of the preamble of claim 1, and is therefore foreign to the class.
  • the shape of the magnet and the pole pieces must also be adhered to very precisely in production, so that the disadvantages explained above also result here.
  • the object of the invention is first of all to provide a method according to the preamble of claim 1, in which on the one hand no tight tolerances have to be observed on the pole shoes and in particular on the magnet in production, but on the other hand it is ensured that the finished one Magnet arrangement between the pole shoe inner surfaces and the magnet outer surface no air gaps arise.
  • Magnet arrangements according to the invention are primarily used in measuring mechanisms for electrical measuring instruments.
  • the magnet is the most expensive part of Beisolchen measuring units. Since it is possible with the invention to reduce the manufacturing costs of the magnet itself by about half without a functional disadvantage and thus to reduce the manufacturing costs of the magnet arrangement accordingly, this has a correspondingly large influence on the costs of the measuring mechanism itself.
  • the invention also has the aim of creating a corresponding magnet arrangement. For this purpose, reference is made to the features of claim 4.
  • the features of claim 5 provide at least welded connections at the points at which the above-described pretensioning of the pole pieces has its greatest force, in order to reliably prevent the pole shoes from springing back unintentionally and disadvantageously into the starting position.
  • the features of claim 6 include a magnet, which (see the above statements) requires very low manufacturing costs.
  • the magnet arrangement consists of a cylindrical magnet 1, two pole pieces 2 and two cover plates 3.
  • the pole pieces 2 form ring-cylindrical sections which extend from the side (from above and from below in FIG. 3) over a substantial part of the circumference of the magnet create this.
  • the pole shoes have a radius r 1 on their inner surface 5 (relative to a point which is somewhat offset from the center 7 of the entire arrangement), which is larger than the radius r 2 of the outer surface 8 of the magnet.
  • the center point of the radius r 2 is identical to the center point 7 of the entire arrangement.
  • the correspondingly shaped pole piece 2 ⁇ is shown in phantom in Fig. 3.
  • the pole shoes with the larger radius r 1 are pressed against the outer surface 8 until the inner surfaces 5 of the pole shoes rest against the outer surface 8 of the magnet (position of the pole shoes 2 shown in solid lines).
  • the inner radius r 1 of the pole shoes (likewise based on a point which is somewhat offset from the center 7 of the entire arrangement) is smaller than the radius r 2 of the outer surface 8 of the magnet.
  • the pressing devices or tools 9 are located somewhat in the middle of the pole shoes.
  • the pole shoes are pressed onto the magnet and the sizes of the wheels r 1, r 2 are adjusted to one another.
  • the cover plates 3 are applied and welded to the pole shoes, in this exemplary embodiment these spot welds 10 are located approximately in the center of the pole shoes, since in the present example the deformation stress of the pole shoes is greatest there.
  • the number of spot welding points 10 can be different than shown.
  • the invention allows the use of an uncut or only roughly machined magnet 1. Nevertheless, with large tolerances, the pole pieces can hold the magnet concentrically in the measuring mechanism. One can halve the magnet price, which currently accounts for up to 50% and even more of the material price of a measuring mechanism.
  • the magnet 1 is a permanent magnet
  • the pole pieces 2 consist of a magnetically very conductive material, such as pure iron.
  • the cover plates 3 can consist of an essentially magnetically non-conductive material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP87109000A 1986-08-27 1987-06-23 Procédé pour la fabrication d'un dispositif d'aimant et dispositif d'aimant ainsi obtenu Ceased EP0260387A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3629085 1986-08-27
DE19863629085 DE3629085A1 (de) 1986-08-27 1986-08-27 Verfahren zur herstellung einer magnetanordnung, sowie zugehoerige magnetanordnung

Publications (1)

Publication Number Publication Date
EP0260387A1 true EP0260387A1 (fr) 1988-03-23

Family

ID=6308266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109000A Ceased EP0260387A1 (fr) 1986-08-27 1987-06-23 Procédé pour la fabrication d'un dispositif d'aimant et dispositif d'aimant ainsi obtenu

Country Status (3)

Country Link
US (1) US4746889A (fr)
EP (1) EP0260387A1 (fr)
DE (1) DE3629085A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6380833B1 (en) 1999-04-07 2002-04-30 Saint-Gobain Performance Plastics Corporation Encapsulated magnet assembly and method for making the same
RU203809U1 (ru) * 2020-10-20 2021-04-21 Акционерное общество "Научно-исследовательский институт Приборостроения имени В.В. Тихомирова" Приемопередающее устройство свч - сигналов

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL107593C (fr) * 1900-01-01
GB664902A (en) * 1948-12-18 1952-01-16 British Thomson Houston Co Ltd Improvements in and relating to dynamo-electric machines
FR1588988A (fr) * 1968-10-07 1970-03-16
US4308479A (en) * 1980-08-28 1981-12-29 General Electric Company Magnet arrangement for axial flux focussing for two-pole permanent magnet A.C. machines
DE3224904A1 (de) * 1982-07-03 1984-01-12 Dornier System Gmbh, 7990 Friedrichshafen Rotor fuer schnelldrehende motoren und generatoren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH501892A (de) * 1968-09-06 1971-01-15 Siemens Ag Vorrichtung mit einer magnetischen Teilung zur Erzeugung von elektrischen Signalen in Halbleiterbauelementen
US3810056A (en) * 1972-08-28 1974-05-07 Outboard Marine Corp Non-magnetized ceramic magnetic assembly
JPS5759464A (en) * 1980-09-29 1982-04-09 Hitachi Ltd Field pole for dc electric machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL107593C (fr) * 1900-01-01
GB664902A (en) * 1948-12-18 1952-01-16 British Thomson Houston Co Ltd Improvements in and relating to dynamo-electric machines
FR1588988A (fr) * 1968-10-07 1970-03-16
US4308479A (en) * 1980-08-28 1981-12-29 General Electric Company Magnet arrangement for axial flux focussing for two-pole permanent magnet A.C. machines
DE3224904A1 (de) * 1982-07-03 1984-01-12 Dornier System Gmbh, 7990 Friedrichshafen Rotor fuer schnelldrehende motoren und generatoren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 200 (E-196) [1345], 3rd September 1983; & JP-A-58 99 253 (FUJITSU FANUC K.K.) 13-06-1983 *

Also Published As

Publication number Publication date
US4746889A (en) 1988-05-24
DE3629085A1 (de) 1988-03-03

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