EP2725589A1 - Inductance et son procédé de fabrication - Google Patents

Inductance et son procédé de fabrication Download PDF

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Publication number
EP2725589A1
EP2725589A1 EP13190579.6A EP13190579A EP2725589A1 EP 2725589 A1 EP2725589 A1 EP 2725589A1 EP 13190579 A EP13190579 A EP 13190579A EP 2725589 A1 EP2725589 A1 EP 2725589A1
Authority
EP
European Patent Office
Prior art keywords
laminated core
sheets
mounting bracket
magnetic flux
electrical inductance
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Withdrawn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
EP13190579.6A
Other languages
German (de)
English (en)
Inventor
Peter Herzog
Jürgen Droste
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.)
Michael Riedel Transformatorenbau GmbH
Original Assignee
Michael Riedel Transformatorenbau 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 Michael Riedel Transformatorenbau GmbH filed Critical Michael Riedel Transformatorenbau GmbH
Publication of EP2725589A1 publication Critical patent/EP2725589A1/fr
Withdrawn legal-status Critical Current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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins

Definitions

  • the invention relates to a method for producing an "inductor with iron core” (electrical transformer, inductor, Transductor, transformer, electric magnet, etc.), hereinafter called inductance, and an inductance produced by this method.
  • inductance electrical transformer, inductor, Transductor, transformer, electric magnet, etc.
  • Electrical inductances are contained in a great many electrical and electronic devices, and their main purpose is to transform or disconnect one or more, in particular different, voltage potentials, in the current limitation or in the formation of a magnetic field.
  • electrical inductors contain one or more electrical coils.
  • bobbin which is usually made of an electrically non-conductive material, usually plastic, or be present as so-called air coils, which have no bobbin as denomination core.
  • the at least one coil is structurally connected to the iron core.
  • the at least one coil is placed over the iron core, that due to the applied coil voltage and the induction occurring in a magnetic flux is generated in the iron core.
  • this is usually made of a stack of superposed individual, rolled sheets, so-called dynamo sheets or transformer sheets, wherein the individual sheets must be electrically isolated from each other.
  • the individual sheets are coated on the rolled surfaces usually with an electrically insulating insulating or here have an electrically non-insulating oxidation layer.
  • That laminated core can enclose the coil partially or fully encircling, the sheets of different formats and sizes joined together form the iron core of the inductive.
  • so-called E, U-I or M blanks of sheets as a compact laminated core be joined together. It will be combined as a single or several different sheet metal blanks to form a laminated core.
  • two or more sheets per layer and in particular from layer to layer are rotated by 180 ° usually piled up, which is a very high and usually only manually manageable workload.
  • the visible in the plan view of the sheet metal contour of each layer in a circumferentially closed iron core is not a single sheet, but this is composed because of the mountability of at least two sheets.
  • the laminated core is assembled on one side (without changing the sheet metal direction) to form a block and then welded together on the outer sides of the abutting edges of the sheets as a block.
  • the resulting magnetic short circuit at the edge of the magnetic field is hereby accepted for economic reasons.
  • the procedure according to the invention is that the laminated core forming the iron core, that is to say the magnetic flux guide body, is no longer produced by laying layer by layer in different alternating orientations, but by aligning two identically shaped types of metal sheets, each in alignment superimposed, two separate metal sheets arise. Up to this point, the procedure still corresponds to the welding of the laminated cores according to the prior art.
  • the subdivision of the overall contour of the iron core in the two laminated cores is usually made so that a laminated core - viewed in the transverse direction to the sheet metal plane - U-shaped or E-shaped, while the other laminated core is rod-shaped, ie I-shaped ,
  • the coil - usually the bobbin, which is usually already provided with the at least one winding at this time - inserted into the inner space of the first laminated core.
  • one leg of the laminated core thereby passes through the interior of the coil, which is often the case, the interior of the coil - regardless of whether it is an air coil or a coil applied to a bobbin coil - dimensioned so that their interior closely to the recorded leg of the laminated core encloses and holds the laminated core together.
  • the second laminated core is placed with one of its side surfaces on the first laminated core and its wetted with adhesive end faces, which it spans all ,
  • the second laminated core is held together transversely to the sheet plane by in the direction of the second laminated core also protruding two mutually oppositely directed webs of the bobbin, if such is present.
  • the laminated cores are preferably placed against each other in each case with those surfaces on which the layers of sheets are visible side by side.
  • the laminated cores are then fixed against each other, once by the bond to the splice of the two laminated cores against each other, and when using a bobbin by the lateral support by the webs of the bobbin.
  • a guide pin having a widened shoulder can be pushed through the aligned with the through hole of the laminated core through hole of the mounting bracket and inserted into the laminated core and glued to it.
  • the coil in particular the wound bobbin, which is located substantially in the inner space of the iron core, so the flux guide body must be designed and dimensioned so that it is positively held in this space and above all until the bonding of the two sheet metal blocks the sheets of each laminated core roughly prefixed against each other.
  • the coil or the bobbin has a central passage opening into which exactly fits the middle free-ending leg of this E-shaped laminated core.
  • the bobbin therefore has two pairs of two oppositely directed webs which project beyond the actual bobbin and extend in the sheet plane, wherein the distance between each pair of webs corresponds to the thickness of the laminated core to be accommodated therebetween.
  • the shape of the sheet metal blocks is preferably chosen so that the one laminated core is rod-shaped or I-shaped, while the other is U-shaped or E-shaped, each viewed in the plan view of the sheet plane, ie in the transverse direction.
  • a mounting bracket is applied, preferably glued or glued by means of guide pins in the corresponding through holes of the laminated core, possibly bolted through guide bushes in the laminated core.
  • the sheets of sheet metal blocks optionally have through holes, which are present in each sheet at the identical location and thus completely penetrate the laminated core.
  • Another possibility is also to use for attaching the electrical inductance, in particular the electrical transformer to a desired component of the environment not the previously used two mounting bracket, but a laterally above the laminated core protruding mounting plate, the transverse to an end face of a laminated core glued to the sheet metal plane, and thus also fixed to this end face the sheets against each other. This also no through holes in the sheets are needed.
  • Fig. 1a shows in perspective view of a transformer according to the prior art, in which the flux-conducting body 24 consists of a stack of stacked sheets 4 a b, 14 a b, and each layer two sheets 4 a, 14 a and 4 b, 14 b, as in Fig. 1 b shown separately for two successive layers.
  • the plate 4 a, b are each E-shaped, and the plate 14 a, b respectively rectangular, and connects the three free ends of the E-shaped plate 4 a and 4 b with each other.
  • the complementary to a sheet metal layers sheets 4 a, 14 a are each adjacent to each other with a common plate plane.
  • each sheet metal plane on two individual sheets is necessary because the bobbin 3 has a through hole 22 through which extends the middle leg of the laminated core, so that the respective E-shaped plate 4 a, 4 b inserted alternately at each position from opposite sides is what would not be possible with a one-piece sheet metal layer.
  • two laminations 1,2 are created by loose superimposing identical sheets 4 a, b and 14 a, b one above the other and always in the same orientation.
  • Fig. 2a this is for a U-shaped laminated core 1 and in Fig. 2b shown for an E-shaped laminated core 1 , while the laminated core 2 is always rod-shaped, that is I-shaped. It has a length corresponding to the length of the connecting leg of the laminated core 1, and also its thickness 18 corresponds to the thickness of the laminated core 1, usually characterized in that both laminated cores 1, 2 consist of an identical number of sheets of the same thickness.
  • the spool 3 consists of a sleeve-shaped, rectangular in this case, the winding core 20 includes a through hole 22 from one end face to the other, through which the medium, freely terminating legs 7 c of the first E-shaped Laminated core 1 can be pushed through.
  • the length of this free middle leg 7 c is the same length or slightly longer than the length of the through hole 22.
  • this winding core 20 From the front ends of this winding core 20 is radially in all 4 directions in each case a circumferential end plate 21 from which represents the frontal boundary for the applied on the outer circumference of the hub 20 winding with the two windings 19 a, b.
  • the - in particular one-piece - bobbin 3 has two pairs of webs 6 a, b, 6 c, d, which project radially outward from the end plates 21 , with a course in the sheet plane and at a distance from each other, the thickness the laminated cores 1, 2 corresponds.
  • this second laminated core 2 On the opposite side of the other pair of webs 6 c, d serves to record the laminated core 2 with its thickness, ie measured transversely to the sheet plane, between the webs 6 c, d.
  • this second laminated core 2 first passes between the two webs 6 c, d and is thereby held together even before he reaches the adhesive 8 . Even after contacting the adhesive 8 and the first laminated core 1 hold the webs 6 c, d the second laminated core 2 together, ie during the curing of the adhesive . 8
  • FIG. 2 b shows, 24 through holes 13 in the individual sheets 4 a, b, 14 a, b in alignment with each other and thus through the entire magnetic flux guide 24 through holes in the sheets of the two laminated cores 1, 2 respectively in the corner regions of approximately rectangular later be.
  • These through holes 13 are also after the bonding of the two sheet stacks 1, 2 freely accessible, since they are outside of the bobbin 3 and not covered by this.
  • a guide pin 15 which preferably also consists of non-conductive material such as plastic, is inserted and glued into such a through hole 13 .
  • a solid guide pin 15 may also be a provided with a through hole guide bushing 17 , which then opens the possibility to put through the inner passage of the guide bushing 17 a clamping screw, without them the sheets 4 a, 14 a and their insulating varnish could damage.
  • Both a guide pin 15 and a hollow guide bushing 17 may have an outwardly projecting shoulder 16 at their rear end, so that this shoulder abuts either on the outside of the outermost sheet or - if mounting brackets 12 are to be attached to the magnetic flux guide 24 , as in Fig. 3 b shown on the top right - such a guide bush 17 or a guide pin 15 can extend through the corresponding through hole in the mounting bracket 12 .
  • the mere gluing of the mounting bracket 12 on the outside of the outermost metal sheet of the magnetic flux guide is sufficient, but by additional insertion and preferably gluing a guide pin 15 or a guide bushing 17 an exact positioning and even better bonding of the mounting bracket 12 is achieved.
  • FIG. 3 b shown bottom right - instead of two mounting bracket 12 a single, flat mounting plate 23 to stick to the end face of the magnetic flux guide, so that the mounting plate 23 also protrudes laterally across the sheet plane perpendicular to the magnetic flux guide and there preferably has slots for screwing with a component of the environment.
  • Fig. 3 c shows the state immediately before bonding, so with already applied, zigzag-shaped adhesive bead of adhesive . 8
  • the projection of the face plates 21 slotted over the webs 6 c, d may be formed for insertion of cable terminals and terminals, and also that the webs 6 c, d may consist of hollow chambers, on the one hand the stabilization of Webs 6 c, d, serve, on the other hand, but can also accommodate additional elements such as terminals.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
EP13190579.6A 2012-10-29 2013-10-29 Inductance et son procédé de fabrication Withdrawn EP2725589A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210110332 DE102012110332A1 (de) 2012-10-29 2012-10-29 Induktivität sowie Herstellungsverfahren hierfür

Publications (1)

Publication Number Publication Date
EP2725589A1 true EP2725589A1 (fr) 2014-04-30

Family

ID=49509974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13190579.6A Withdrawn EP2725589A1 (fr) 2012-10-29 2013-10-29 Inductance et son procédé de fabrication

Country Status (2)

Country Link
EP (1) EP2725589A1 (fr)
DE (1) DE102012110332A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370350A (en) * 1965-03-24 1968-02-27 Navy Usa Method of fastening cores of electromagnetic devices
FR2497598A2 (fr) * 1980-02-05 1982-07-09 Legrand Sa Procede et dispositif pour l'assemblage par collage d'un circuit magnetique et appareillage electrique comportant un tel circuit, en particulier transformateur
JPH08111322A (ja) * 1994-10-07 1996-04-30 Nkk Corp 低騒音トランス及びリアクトル用のコア
JPH10199741A (ja) * 1997-01-10 1998-07-31 Sanken Electric Co Ltd コイル装置の組立方法
DE20116954U1 (de) * 2001-10-16 2003-02-20 Waasner Elektrotechnische Fabr Transformator oder Drossel mit zusammenhaltenden Streifen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363606A (en) * 1930-05-21 1931-12-24 British Thomson Houston Co Ltd Improvements in and relating to magnetic cores
DE749162C (de) * 1940-08-17 1944-12-22 Verfahren zum Verkleben von an den Stossfugen mit Korrosionsschutz versehenen lamellierten Koerpern
DE1685016U (de) * 1954-04-01 1954-10-14 Licentia Patenverwaltungs G M Lamellierter magnetkern, insbesondere fuer relais, schuetz od. dgl.
DE1194998B (de) * 1961-04-29 1965-06-16 Fuba Vorrichtung zum Zusammenhalten der Teile eines zusammengesetzten Magnetkerns fuer Spulen
DE3020574C2 (de) * 1980-05-30 1982-12-09 Werner 8340 Pfarrkirchen Schaffer Verfahren zur Befestigung der Drahtenden von Transformatorwicklungen an den Anschlußstiften eines Wicklungsträgers
DE4312194A1 (de) * 1993-04-14 1994-10-20 Joh Schlenker Maier Gmbh & Co Isolationsteilesatz für Transformatoren
DE29712178U1 (de) * 1997-07-10 1997-09-18 Siemens AG, 80333 München Wechselstrommagnet mit niedriger Verlustleistung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370350A (en) * 1965-03-24 1968-02-27 Navy Usa Method of fastening cores of electromagnetic devices
FR2497598A2 (fr) * 1980-02-05 1982-07-09 Legrand Sa Procede et dispositif pour l'assemblage par collage d'un circuit magnetique et appareillage electrique comportant un tel circuit, en particulier transformateur
JPH08111322A (ja) * 1994-10-07 1996-04-30 Nkk Corp 低騒音トランス及びリアクトル用のコア
JPH10199741A (ja) * 1997-01-10 1998-07-31 Sanken Electric Co Ltd コイル装置の組立方法
DE20116954U1 (de) * 2001-10-16 2003-02-20 Waasner Elektrotechnische Fabr Transformator oder Drossel mit zusammenhaltenden Streifen

Also Published As

Publication number Publication date
DE102012110332A1 (de) 2014-04-30

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