EP1564765A2 - Powder composite magnetic core and method of manufacturing the same - Google Patents

Powder composite magnetic core and method of manufacturing the same Download PDF

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Publication number
EP1564765A2
EP1564765A2 EP20040460056 EP04460056A EP1564765A2 EP 1564765 A2 EP1564765 A2 EP 1564765A2 EP 20040460056 EP20040460056 EP 20040460056 EP 04460056 A EP04460056 A EP 04460056A EP 1564765 A2 EP1564765 A2 EP 1564765A2
Authority
EP
European Patent Office
Prior art keywords
magnetic
electrotechnical
powder
magnetic core
die
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Withdrawn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
EP20040460056
Other languages
German (de)
English (en)
French (fr)
Inventor
Bogumil Weglinski
Sebastian Juchim
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.)
Politechnika Wroclawska
Original Assignee
Politechnika Wroclawska
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 Politechnika Wroclawska filed Critical Politechnika Wroclawska
Publication of EP1564765A2 publication Critical patent/EP1564765A2/en
Withdrawn legal-status Critical Current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
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • 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
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder

Definitions

  • the invention concerns method for manufacturing powder composite magnetic core and powder composite magnetic core designed for use in electrotechnical appliances, and especially in electrical machines.
  • Inductive element and method for producing the same are already known from international patent application WO02/101763.
  • Said powder composite is produced by mixing a ferromagnetic amorphous or nanocrystalline alloy powder with a ferromagnetic dielectric powder and a thermoplastic or duroplastic polymer, with dielectric ferromagnetic powder alloy equaling more than 55% by volume.
  • Inductive element produced of dielectric ferromagnetic powder is characteristic in that in the mixture of powders, ribbons of ferromagnetic alloy are placed in the mixture of powders.
  • magnetic cores or powder composite magnetic cores which are manufactured as components from homogenous mass of compressed powder, wherein the compacted magnetic cores are annealed or sintered following their compacting.
  • method for manufacturing comprises the die being filled with magnetic powder composite, with at least one electromagnetic element being placed within the die during pouring of the powder, following which procedure magnetic powder composites are being bounded with inductive electrotechnical elements through compacting.
  • electrotechnical elements sheets wires and bars of magnetically soft metal are located in the die.
  • the electrotechnical elements are coated with thin gluing layer.
  • the essence of the method of manufacturing comprises inserting at least one electrotechnical element into the element mad of compacted magnetic composite.
  • steel or magnetically soft wire can be employed, favourably manufactured of magnetically soft material.
  • Powder composite magnetic cores manufactured using this innovative method is characterized by increased mechanical strength.
  • Electromagnetic circuits with new magnetic cores are characterized by improved magnetic properties. In these new magnetic cores higher values of magnetic induction are obtained at the same values of magnetic field intensity and magnetic permeability increases.
  • powder composite magnetic cores are manufactured as hybrid magnetic cores of reinforced structures, with powder magnetic composites being used as the basis of the hybrid arrangement and electrical sheets, bars and wires are made of soft magnetic materials.
  • Hybrid arrangement is shaped in the process of the die being filled with magnetic powder composite. Electrical sheets on top and bottom surface of the magnetic powder which fills the die; within the magnetic core or in all these places.
  • a magnetic core of reinforced top and bottom surfaces, or of reinforced inside, or of reinforced top and bottom surfaces and reinforced inside is obtained, depending on the arrangement of components prepared earlier.
  • Soft magnetic wires are inserted in the die during pouring of the powder into the die as bundles, single wire vain along whole length of the prepared magnetic core, along the predicted magnetic flux flow path.
  • reinforced magnetic core is obtained. All the elements of bundle of wires or elements of electrical sheet, before they are placed in the die, are being coated with a thin layer of thermosetting resin in order to obtain better bounding with the powder structure during compacting. Compacting of the hybrid arrangement is conducted in standard conditions typical for obtaining of composite magnetic cores.
  • FIG. 1 illustrates cross-sectional view of the magnetic core of compressed magnetic composite with four bars made of soft magnetic material
  • Fig. 2 longitudinal section of magnetic core with two steels made of soft magnetic material
  • Fig. 3 cross-sectional view of a cubicoid magnetic core with nine bars made of soft magnetic material
  • Fig. 4 cross-sectional view of a magnetic core with four bars made of soft magnetic material and coated with gluing layer
  • Fig. 5 - axial view of a cylindrical magnetic core with two sheets made of soft magnetic material and coated with gluing layer
  • Fig. 1 illustrates cross-sectional view of the magnetic core of compressed magnetic composite with four bars made of soft magnetic material
  • Fig. 2 longitudinal section of magnetic core with two steels made of soft magnetic material
  • Fig. 3 - cross-sectional view of a cubicoid magnetic core with nine bars made of soft magnetic material
  • Fig. 4 cross-sectional view of a magnetic core with four bars made of soft magnetic material and coated with gluing layer
  • Fig. 5
  • FIG. 6 - axial view of a magnetic cores with wires made of soft magnetic material arranged symmetrically to the axis on external diameter of the core
  • Fig. 7 - axial view of a cylindrical magnetic core with wires made of soft magnetic material arranged symmetrically and parallel to the axis of the magnetic core and on its external diameter
  • Fig. 8 longitudinal section of magnetic core with two steels made of soft magnetic material, coated with gluing layer
  • Fig. 9 magnetization characteristics for both the hybrid and the homogenous magnetic cores
  • Fig. 11 presents mechanical properties of both the hybrid and the homogenous magnetic cores.
  • Method for manufacturing powder composite hybrid magnetic core comprises the cylindrical die being filled with magnetic powder composite. During compacting, four electrotechnical elements 3 in the form of soft magnetic material are being inserted into it. Subsequently, powder composite material is being bounded with wires 3 through the process of compaction.
  • Method for manufacturing powder composite hybrid magnetic core proceeds as in example 1, the difference being that two electrotechnical elements 3 in the form of electrical steel sheets material are inserted into cubicoid die.
  • Method for manufacturing powder composite hybrid magnetic core proceeds as in example 1, the difference being that nine electrotechnical elements 3 made of soft magnetic material are inserted into cubicoid die.
  • Method for manufacturing powder composite hybrid magnetic core proceeds as in example 1 or 2, the difference being that electrotechnical elements 3 are coated with thin gluing layer of thermosetting resin.
  • Magnetic core manufactured as cylindrical hybrid core with two electrotechnical elements made of soft magnetic sheet within the compacted magnetic powder composite 1.
  • Magnetic core manufactured as in example 5 the difference being that the magnetic core is cylindrically shaped and has eight electrotechnical elements 3 which are made of soft magnetic material. Wires 3 are arranged symmetrically to the axis of cylindrical hybrid magnetic core on its external diameter.
  • Magnetic core manufactured as in example 5 the difference being that twelve electrotechnical elements 3 are bars made of soft magnetic material. Bars 3 are arranged symmetrically to the axis of cylindrical hybrid magnetic core on its external diameter.
  • Magnetic properties of new powder composite magnetic cores are presented in diagrams of magnetization characteristics, magnetic permeability and mechanical properties of hybrid magnetic core toroidal samples A and B and of homogenous sample C.
  • the first hybrid magnetic core - A - has centrally located bundle of wires being electrotechnical elements 2 on external diameter of the core, inside the compacted magnetic powder composite. These wires are made of soft magnetic material.
  • the second hybrid magnetic core B has electrotechnical elements 2 in the form of soft magnetic wires placed on its external diameter, with the wires being located in corners of the cross-section of compacted powder composite material 1.
  • the third magnetic core is manufactured of compacted powder composite material 1 only.
  • the above magnetic cores are made of identical powder composite material 1 and the electrotechnical elements 2 in the form of wires are manufactured of the same soft magnetic material.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Hard Magnetic Materials (AREA)
EP20040460056 2003-12-24 2004-12-23 Powder composite magnetic core and method of manufacturing the same Withdrawn EP1564765A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL364236A PL202423B1 (pl) 2003-12-24 2003-12-24 Magnetowód z kompozytów proszkowych i sposób wytwarzania magnetowodu z kompozytów proszkowych
PL36423603 2003-12-24

Publications (1)

Publication Number Publication Date
EP1564765A2 true EP1564765A2 (en) 2005-08-17

Family

ID=34699208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040460056 Withdrawn EP1564765A2 (en) 2003-12-24 2004-12-23 Powder composite magnetic core and method of manufacturing the same

Country Status (2)

Country Link
EP (1) EP1564765A2 (pl)
PL (1) PL202423B1 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106688057A (zh) * 2014-09-09 2017-05-17 普莱默公司 柔性软磁芯、具有柔性软磁芯的天线及生产柔性软磁芯的方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106688057A (zh) * 2014-09-09 2017-05-17 普莱默公司 柔性软磁芯、具有柔性软磁芯的天线及生产柔性软磁芯的方法
CN106688057B (zh) * 2014-09-09 2018-08-14 普莱默公司 柔性软磁芯、具有柔性软磁芯的天线及生产柔性软磁芯的方法
KR101923570B1 (ko) 2014-09-09 2018-11-30 프레모, 에세엘레 가요성 연성 자기 코어, 가요성 연성 자기 코어를 갖는 안테나, 및 가요성 연성 자기 코어를 생성하는 방법

Also Published As

Publication number Publication date
PL364236A1 (pl) 2005-06-27
PL202423B1 (pl) 2009-06-30

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