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EP1776709B1 - Induktives bauelement für hohe ströme und verfahren zu dessen herstellung - Google Patents

Induktives bauelement für hohe ströme und verfahren zu dessen herstellung Download PDF

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Publication number
EP1776709B1
EP1776709B1 EP05774087.0A EP05774087A EP1776709B1 EP 1776709 B1 EP1776709 B1 EP 1776709B1 EP 05774087 A EP05774087 A EP 05774087A EP 1776709 B1 EP1776709 B1 EP 1776709B1
Authority
EP
European Patent Office
Prior art keywords
current conductor
conductor
another
component according
magnet core
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.)
Active
Application number
EP05774087.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1776709A1 (de
Inventor
Roman Brunel
Josef Feth
Gerd Riedel
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.)
TDK Electronics AG
Original Assignee
Epcos AG
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 Epcos AG filed Critical Epcos AG
Priority to EP12153862.3A priority Critical patent/EP2458598B1/de
Publication of EP1776709A1 publication Critical patent/EP1776709A1/de
Application granted granted Critical
Publication of EP1776709B1 publication Critical patent/EP1776709B1/de
Active 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/303—Clamping coils, windings or parts thereof together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2895—Windings disposed upon ring cores
    • 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
    • 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
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to an inductive component with a closed magnetic core, which is used in applications for high currents (eg in mains filters).
  • An inductive component is known from the publications DE 2850657 C2 and CH 290733 , Further inductive components are made JP10106861 . JP 2001274030 . US 2947960 or JP 06 30 2437 known.
  • An inductive device suitable for high currents has a current conductor with a large cross-section.
  • the current conductor may be formed as a flexible strand or a hard-to-bend solid conductor (eg busbar).
  • the present invention has for its object to provide a suitable for high currents inductive component having a high inductance and a small footprint.
  • the invention provides an inductive component suitable for high currents with a closed magnetic core and a conductor which runs at least twice through the interior of the magnetic core and forms a winding of the inductive component.
  • the conductor comprises a plurality of firmly connected, pre-bent or angled parts of a Solid conductor, which has a high bending strength.
  • Two interconnected conductor parts can, for. B. be U-shaped, wherein the leg length of the U-piece may be different.
  • Two interconnected current conductor parts can also be designed in each case as an L-piece.
  • the connection of a U-piece with an L-piece is also provided.
  • the conductor parts can be bent twice or bent at least once, to form a U-piece twice, in a variant also more than twice. It is essential that a leg of the respective conductor part 'can be pushed through the inner hole of the core.
  • the invention has the advantage that in the case of an inductive component designed for high currents, high inductance values can be achieved with a small constructional volume.
  • the number of turns is quadratic.
  • a solid conductor has the advantage of low ohmic losses compared to a flexible conductor which is composed of several current wires.
  • the solid conductor has a high dimensional stability and therefore a high mechanical strength.
  • Conductor parts realized from a solid conductor have the advantage that they retain a predetermined shape when connected to further conductor parts.
  • a solid conductor in the inductive component according to the invention is to be distinguished from a flexible wire, in particular from a wire wound around a core.
  • the current carrying capacity of the solid conductor may vary depending on the application z. 200A, 500A, 1000A or 2500A.
  • the hard-to-bend Solid conductor is preferably also to be distinguished from a flexible solid conductor, which has a current carrying capacity of less than 150 A.
  • the solid conductor preferably represents a busbar or busbar with a rectangular cross section.
  • the solid conductor can, for. B. be a copper rail or an aluminum rail.
  • the solid conductor can also consist of another metal with a good electrical conductivity.
  • the solid conductor can also be a flat conductor made of stamped metal, z. B. be sheet metal. It is advantageous if at least one of the firmly interconnected conductor parts has two contact areas which are offset in height from one another.
  • the ladder parts can z. B. U-shaped or L-shaped flat parts, wherein transversely extending portions of the conductor part are either in a plane when U-shaped, or in the planes which form an acute angle to each other when U-shaped or L-shaped ,
  • the conductor may be in one variant, an electrical conductor without Isolierumhüllung.
  • the current conductor can have an insulating sheath.
  • the Isolierumhüllung can z. B. be formed by an insulating varnish or a plastic layer.
  • the conductor is preferably composed of a plurality of sub-conductors, the z. B. are mechanically firmly connected by screwing, soldering or welding. Such an embodiment of the conductor facilitates the installation of a winding with closed cores.
  • junction between different parts of the conductor is preferably outside the interior of the magnetic core, for. B. above the plane in which the upper end face of the magnetic core is located, or below the plane in which the lower end face of the magnetic core is located.
  • the magnetic core can be designed in a variant as a homogeneous closed ring core with or without, gap.
  • the gap may be filled with a material having a different magnetic permeability from the material of the core.
  • the magnetic core of several parts, for. B. composed of two U or E parts.
  • the core may also be formed of an E-shaped and a rod-shaped core part, forming two closed magnetic circuits.
  • the gaps formed in this case can be filled with a material having a different magnetic permeability from material of the core.
  • an adhesive for connecting the core parts can be arranged together.
  • the core or the core part can, for. Example of iron, metal oxides, ceramics, plastic, ferrites or other soft magnetic materials or alloys thereof.
  • the core or the core part may be composed of iron sheets.
  • the magnetic core may be multi-part, wherein the core parts each have a closed magnetic circuit and are arranged one above the other along the core axis.
  • the pre-bent or angled parts of the conductor can be inserted through the inner hole of the magnetic core and then outside of the inner hole of the core with each other get connected.
  • pre-bent conductors are assembled in a one-piece magnetic core.
  • a composite magnetic core it is possible first to bend the conductor or to connect the parts of the conductor together, wherein turns of a winding are formed.
  • the first core part is pushed through the windings of the conductor.
  • the first core part is then mechanically connected to a second core part.
  • a choke with two windings and the second core part is pushed through the turns of another conductor.
  • the two core parts with windings are then mechanically interconnected.
  • the conductor is preferably fixed in the device so that it does not touch the core.
  • the arrangement of the core and the conductor or parts of the arrangement may be in the housing of the device z. B. be fixed by means of a potting. It is also possible to attach the core and the conductor to the housing independently.
  • the current conductor preferably forms a winding which is wound around the magnetic core.
  • Each turn of the conductor is assigned its own winding level.
  • a portion of the conductor can be angled so that thereby takes place the change from one winding plane to the next winding plane.
  • the transition to the next winding level can also be achieved by angled connecting pieces between the parts of the conductor.
  • the invention can be used, for example, as a current-compensated choke in a line filter suitable for two, three or> 3 current phases.
  • each of the windings is essentially formed as the first current conductor described above.
  • the opening of the U-piece facing the first end face of the core.
  • the opening of the U-piece preferably has the second end face of the core.
  • the legs of the two U-pieces have an overlap region and are firmly connected to each other in this area.
  • the U-pieces are pre-bent.
  • they are available as stamped flat parts.
  • FIG. 1 shows an inductive component with a magnetic core 3 and two windings, which are formed by a first conductor 1 and a second conductor 2.
  • the arrangement of the magnetic core 3 and the current conductors 1, 2 is arranged in a housing 4 made of sheet metal.
  • the first conductor 1 is composed of two pre-bent parts 11 and 12.
  • the second conductor 2 is also composed of two pre-bent parts 21 and 22.
  • the parts of the respective conductor are connected together by means of fastening elements 71 and 72 firmly together, for. B. screwed.
  • the first part 11 of the first conductor 1 has two openings for receiving fastening elements 71, an opening 11b visible in FIG. 2 in the region of the first terminal 111 of the first conductor 1 and a further opening for receiving a fastening element 73.
  • the fastening element 73 is used for fastening a line piece, not shown here, which produces the electrical connection to the board 8 here.
  • the first part 11 of the first conductor 1 may have only one opening for receiving fastening elements or more than two such openings.
  • the second part 12 of the first conductor 1 has two openings for receiving fastening elements 71, an opening 12b visible in FIG. 2 in the region of the second connection 112 of the first conductor 1 and a further opening 77 for receiving a fastening element 76 (see FIG Fig. 2 ) on.
  • the fastener 76 is used for attachment of a line piece, not shown here, in Fig. 2 the electrical connection to the capacitor 6 produces.
  • the first conductor 1 extends twice through the inner hole 31 of the closed magnetic core 3.
  • the second conductor 2 also passes twice through the inner hole 31 of the magnetic core 3.
  • the second conductor 2 is similar in structure as the first conductor. 1
  • the parts 11, 12 of the conductor 1 are constructed so that they can be easily inserted through the magnetic core 3 respectively.
  • the decomposition of the conductor 1 in the sections 11, 12 may, for. B. - as in Fig. 3A shown - be made so that the distance a between the legs of the U-shaped member 11 is not smaller than the wall thickness b of the magnetic core.
  • the parts 11, 12 are mechanically connected to each other and fixed relative to the core, that their connection point above the plane in which the upper end face of the magnetic core 3 is arranged, is located.
  • the arrangement can be designed to save space, in particular in the direction transverse to the axis of the magnetic core 3. It is advantageous if the connection point between the sections 11, 12 faces away from the inner hole 31 of the magnetic core 3.
  • the conductor 1 can be broken down into more than two sections depending on the predetermined number of turns. It is advantageous to form the sections with U-shaped areas, wherein the (preferably shorter) legs of different U-parts partially overlap with each other.
  • the core can be inserted between the legs of a U-section.
  • the sections 11, 12 of the first conductor 1 and the sections 21, 22 of the second conductor 2 are preferably angled toward the outside so that the distance between the first component terminals 111 and 211 the distance between the second component terminals 112 and 212 is equal to.
  • only parts are used, each of which forms less than a whole turn around the core. They preferably form a half or three quarters turn.
  • the first conductor 1 is fixed by means of the insulating inserts 51, 53 in the housing 4 and electrically isolated from this.
  • the second conductor 2 is fixed by means of the insulating inserts 52, 54 in the housing 4 and electrically isolated from this.
  • the inserts 51 to 54 are fastened in the housing by means of the fastening elements 74, 75.
  • the magnet core 3 is a toroidal core with an inner hole 31.
  • the magnet core 3 is here in three parts, wherein the core parts each have a closed magnetic circuit and are arranged one above the other along the core axis.
  • the magnetic core 3 is fixed in the housing 4 such that it does not touch the windings of the current conductors 1, 2.
  • the winding may contact the core if the core is electrically insulated from an electrically insulating material or the winding of core.
  • the housing 4 surrounds the magnetic core 3, the first conductor 1 to its terminals 111, 112 and the second conductor 2 except for its terminals 211, 212.
  • the housing 4 has openings 41 for receiving further fasteners, with which the entire component z. B. can be mounted on a panel or in a sheet metal cabinet.
  • the openings 41 may also be rivet holes for a housing cover.
  • FIG. 2 shows the perspective view of a network filter with an inductive component according to the invention.
  • the housing 4 in addition to the inductive component (elements 1, 2, 3) are electrically connected to this connected capacitors 6 and 81 to 83.
  • the capacitors 81 to 83 are mounted on a printed circuit board 8.
  • the circuit board 8 is electrically connected to the housing 4 by means of a copper strip 84 low inductively.
  • FIGS. 3A to 3F show process steps in the assembly of the conductor to the magnetic core.
  • the closed magnetic core 3 and the sections 11, 12 of the first conductor 1 and the sections 21, 22 of the second conductor 2 are provided.
  • the sections 11, 12, 21, 22 of the first 1 and second 2 current conductors are U-shaped with an angled longer leg.
  • the first part 11 of the first conductor 1 and the first part 21 of the second conductor 2 is pushed through from below over the wall of the magnetic core 3 ( Fig. 3A, 3B . 3E ) and aligned so that the distance to the magnetic core 3 is maintained, and z. B. by means of in Fig. 2 shown inserts 51, 52, z. B. by means of bushings, not shown in the housing of the component ( Fig. 3C . 3F ).
  • the openings 11 a, 12 a of the sections 11, 12 coincide with each other and the distance to the magnetic core 3 is maintained, and z. B. by means of in Fig. 2 shown inserts 53, 54, z. B. by means of bushings, fixed in the housing of the device ( Fig. 3D . 3F ).
  • the section 11 is z. B. firmly connected by means of fastening elements with the section 12.
  • the section 21 is z. B. by means of fasteners firmly connected to the section 22.
  • the joining of the sections together can be done before fixing these sections in the housing.
  • the joining of the sections with each other can also be done after fixing these sections in the housing.
  • the magnetic core can be fixed in a variant prior to the passage of the sections 11, 12, 21, 22 in the housing.
  • the magnetic core can be fixed in the housing only after the alignment and fixing of the sections 11, 12, 21, 22.
  • the first assembly of the first conductor 1 is mounted first.
  • the second conductor 2 is mounted in the same manner.
  • first sections 11, 21 can also be inserted or mounted in a single step, wherein the second sections 12, 22 are pushed through and mounted in a further step.
  • FIG. 4 an inductive component with a winding is shown, which is composed of firmly interconnected L-shaped flat conductor parts 11 ', 12' 13 '.
  • the first flat conductor parts 11 'and 13' are bent so that they each have a sloping portion 11 b, 13 b.
  • the section 11b or 13b connects the sections 11a and 11c or 13a and 13c arranged in different winding planes. With the oblique portion of the L-piece or by mounting with a height offset (the connecting areas) so succeeds the transition between two winding levels.
  • connection regions of flat conductor parts 11 ', 12' and 13 ' are assigned to a connection region 101, 102, 103, 104.
  • the connection areas 101 and 103, 102 and 103, 102 and 104 of two flat conductor parts are arranged along one diagonal each.
  • the flat conductor parts are firmly connected to each other in the connection areas, z. B. welded, bolted or brazed.
  • the first flat conductor parts 11 'and 13' are connected to each other by means of a second flat conductor part 12 '.
  • the second flat conductor part 12 ' has no kink and is arranged in a winding plane. In principle, however, it can also be folded like the parts 11 ', 13'.
  • the winding may comprise more than just two first parts 11 ', 13' and only one second part 12 '.
  • the conductor part 11 ' is fixedly connected to the connection piece 111 and the conductor part 13' with the connection piece 112.
  • the connecting pieces preferably each have at least one opening for receiving a fastening element.
  • the L-pieces in Fig. 4 can be replaced in a non-inventive variant by U-shaped flat conductor parts, wherein z. B. the first U-part is bent in such a way that its connector runs obliquely.
  • the second U-part can lie in a winding plane or be bent.
  • the junctions of two U-pieces preferably face the faces of the core.
  • the magnetic core in FIG. 4 is a closed core composed of two interconnected U-pieces.
  • the magnetic core can also be integral.
  • the invention is not limited to the example presented or certain materials. Further developments of the invention z. As regards the configuration of the connection point between different parts of the conductor or with respect to the attachment of parts of the arrangement of the core and the conductor are provided.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
EP05774087.0A 2004-08-12 2005-08-11 Induktives bauelement für hohe ströme und verfahren zu dessen herstellung Active EP1776709B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12153862.3A EP2458598B1 (de) 2004-08-12 2005-08-11 Induktives Bauelement für hohe Ströme und Verfahren zu dessen Herstellung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004039230A DE102004039230A1 (de) 2004-08-12 2004-08-12 Induktives Bauelement für hohe Ströme und Verfahren zu dessen Herstellung
PCT/DE2005/001422 WO2006015589A1 (de) 2004-08-12 2005-08-11 Induktives bauelement für hohe ströme und verfahren zu dessen herstellung

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP12153862.3A Division-Into EP2458598B1 (de) 2004-08-12 2005-08-11 Induktives Bauelement für hohe Ströme und Verfahren zu dessen Herstellung
EP12153862.3A Division EP2458598B1 (de) 2004-08-12 2005-08-11 Induktives Bauelement für hohe Ströme und Verfahren zu dessen Herstellung

Publications (2)

Publication Number Publication Date
EP1776709A1 EP1776709A1 (de) 2007-04-25
EP1776709B1 true EP1776709B1 (de) 2014-06-25

Family

ID=35134834

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05774087.0A Active EP1776709B1 (de) 2004-08-12 2005-08-11 Induktives bauelement für hohe ströme und verfahren zu dessen herstellung
EP12153862.3A Active EP2458598B1 (de) 2004-08-12 2005-08-11 Induktives Bauelement für hohe Ströme und Verfahren zu dessen Herstellung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12153862.3A Active EP2458598B1 (de) 2004-08-12 2005-08-11 Induktives Bauelement für hohe Ströme und Verfahren zu dessen Herstellung

Country Status (6)

Country Link
US (1) US8063728B2 (zh)
EP (2) EP1776709B1 (zh)
JP (1) JP2008509568A (zh)
CN (1) CN1993782B (zh)
DE (1) DE102004039230A1 (zh)
WO (1) WO2006015589A1 (zh)

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JP2008509568A (ja) 2008-03-27
US8063728B2 (en) 2011-11-22
EP2458598A1 (de) 2012-05-30
US20080012675A1 (en) 2008-01-17
WO2006015589A1 (de) 2006-02-16
DE102004039230A1 (de) 2006-02-23
CN1993782A (zh) 2007-07-04
EP2458598B1 (de) 2017-09-27
EP1776709A1 (de) 2007-04-25
CN1993782B (zh) 2011-05-11

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