EP3021332A1 - Inductance et son procédé de fabrication - Google Patents

Inductance et son procédé de fabrication Download PDF

Info

Publication number: EP3021332A1
Authority: EP; European Patent Office
Prior art keywords: longitudinal; coils; yokes; yoke; inductance
Prior art date: 2014-06-04
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.): Granted

Application number

EP15169708.3A

Other languages

German (de)

English (en)

Other versions

EP3021332B1 (fr

Inventor

Martin Brust

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.)

2014-06-04

Filing date

2015-05-28

Publication date

2016-05-18

2015-05-28 Application filed by Michael Riedel Transformatorenbau GmbH filed Critical Michael Riedel Transformatorenbau GmbH

2016-05-18 Publication of EP3021332A1 publication Critical patent/EP3021332A1/fr

2019-09-18 Application granted granted Critical

2019-09-18 Publication of EP3021332B1 publication Critical patent/EP3021332B1/fr

Status Active legal-status Critical Current

2035-05-28 Anticipated expiration legal-status Critical

Images

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
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
- 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
- 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
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers

Definitions

the invention relates to a method for producing "inductors with iron core”, including generally electrical transformers, electric reactors, electrical filters, electromagnets, etc., hereinafter referred to as "inductance”, as well as an inductance produced by this method.
the present application focuses on inductors for use as electrical reactors (line and commutating reactors, filter reactors, motor reactors, etc.) and electrical filters for use with frequency converters (sine-wave filters and du / dt filters, etc.).
Electrical inductances are contained in a great many electrical and electronic devices, and their main purpose is to convert or separate one or more, in particular different, voltage potentials, in current limitation, the reduction of voltage rising edges, the compensation of harmonic components or in the formation of a magnetic field.
electrical inductors contain one or more electrical coils.
windings can be wound on a bobbin, which is usually made of an electrically non-conductive material, usually plastic be present or as so-called air coils, which have no bobbin as a winding 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 this case, a magnetic flux is generated in the iron core.
this is usually made of a stack of superimposed 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 possess here an electrically insulating oxidation layer.
the laminated core can enclose the coil partially or fully encircling, wherein the sheets of different formats and sizes joined together form the iron core of the inductor.
E UI or M blanks can be merged into 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.
chokes and filters which are a passive attenuator, for example, for filtering out the harmonic harmonics
a defined air gap is needed just because it just causes the desired damping.
the desired damping behavior in each case is determined by the size and arrangement of the air gaps in the iron core, ie in or between the laminated cores.
the middle longitudinal leg is just as long or longer than the coil that is arranged around it.
securing strips made of electrically insulating material
the longitudinal limb which are longer than the central longitudinal limb and extend into the region of the yokes extend into it and thereby form a positive locking against lateral withdrawal of the central coil and the central longitudinal leg.
the positions of the air gaps and their number can be selected by the longitudinal legs do not have to be each one piece, but in their direction of extension may consist of several sections.
the coil preferably extends over the air gaps between the outer longitudinal limb and the extension of the yoke, so that there - even if additional air gaps are provided - all the air gaps are within the length of the coil, which is very advantageous for the function as throttle or filter (minimization of stray fields).
the iron core is held together by a tensioning device acting only from the outside, which does not penetrate the iron core, and which is additionally variable in the spacing of its clamping plates, that is, when e.g. different thickness spacers are used in the air gaps.
the longitudinal legs should have the same cross-section as the extensions of the yoke, and in particular the sheet planes in the longitudinal limbs run in alignment with those in the extensions in order to achieve a homogenization of the magnetic field forming.
the central longitudinal leg thus ends in front of the inner surfaces of the C-shaped yoke in its central region, usually with an air gap to the yoke.
the thus not existing positive securing the middle longitudinal leg is achieved by the additional, already mentioned securing strips.
the air gaps are usually effected by inserted spacers made of electrically insulating material, which is a very easy way to produce air gaps defined width.
the longitudinal legs are generally cuboid and then consist of stacked rectangular plates.
the coils around the individual longitudinal limbs have an axial length, that extends in the longitudinal direction of the longitudinal leg, which fills the distance between the two yokes as completely as possible in order to effect a positive securing of the longitudinal position of the coils within the iron core alone.
the yokes are not bent at the transition from their main part in the extension just 90 °, but cranked twice by 45 ° and thus have at their ends a slope, both in its outer contour and in its inner contour, and all the sheets from which the yoke is formed, have this slope.
the individual longitudinal limbs may be formed in several parts in their course, with free choice between the length of these items as well as the width of the air gaps therebetween.
the spacers should preferably have the same area as the cross-section of the longitudinal leg in which they are located in order not to cause a different dielectricity in the interior of the air gap.
the cross-sectional area of the longitudinal legs and the extensions of the yokes is dimensioned so that they fill together with the inserted on both sides of the fuse strip exactly the inner space of each coil and Thereby, a precisely fitting positive locking between the coil on the one hand and iron core on the other hand is given.
the securing strips are also used in the outer legs, although they would not be needed there for the positive locking, since the extensions of the yokes protrude into the interior of the coil in the outer coils.
the fuse strips are therefore also arranged on the outer longitudinal limbs, so that the iron core can be made of sheet metal strips of constant thickness, otherwise the width of the metal strip used for the yoke would have to change from the central region to the extensions, which is detrimental to the function and consuming for the production of these sheets is.
the tensioning device is preferably made of two clamping plates which are placed on the outer sides of the yokes and have a projection either in the main plane of the iron core or transversely thereto or both. At their supernatant, the two clamping plates are clamped by means of clamping screws in the longitudinal direction against each other, and thus press the yokes against each other, so that a pressure on the spacers, which define the air gaps, constructed and maintained.
the clamping plates are preferably formed as hat profiles.
the clamping plates also have further passage openings in addition to the holes for the clamping screws that penetrate them. in order to drain the casting agent in the subsequent wetting or potting the entire assembled inductance.
clamping plate On the clamping plate can also - if necessary between the yoke and clamping plate - a conventional NS rail for attaching transformers be arranged, which are required for operation as a throttle or filter.
the clamping plates are wider than the iron core measured transversely to its main plane and also wider than the coils in this direction, firstly to be able to attach clamping screws in the projection, but also to provide a protective projection over the coil and the iron core ,
the variation width is even greater, although the modular system contains several varieties, for example several partial longitudinal limbs, in order to be able to assemble middle and outer longitudinal limbs from these partial longitudinal limbs.
the resulting changing dimensions of the iron core in the longitudinal direction of the longitudinal struts can without problems by correspondingly long external thread on the Clamping screws of the clamping device can be compensated or for large differences in length by differently long clamping screws within the kit.
the kit can also include several varieties of different lengths coils and fuse strips of different lengths.
the outer longitudinal limbs are inserted into the outer coils, and the middle longitudinal limb is inserted into the middle coil.
the second yoke can be inserted with its extensions in the outer coils - again with the interposition of a spacer - and the clamping device are mounted, which presses in this position, the two yokes against each other.
the clamping device consists of the two clamping plates and connecting clamping screws, the - preferably hat-shaped - clamping plates are placed on the outside of the yokes and screwed the clamping screws.
the iron core 24 off FIG. 1 is in FIG. 2a shown in the plan on its main plane 16 , and in FIG. 2b in the side view, ie in the direction of view of this main plane 16th
each of the yokes 2 has at its ends in right angle to the direction of extension of the yoke 2 in the same direction projecting extensions 7 a, b.
the extensions 7 a, b of the lower yoke 2 are directed upward, the extensions 7 a, b of the upper yoke 2 are directed downward, and are aligned with the projections 7 a, b of the lower yoke . 2
the transition of the main part of the yoke 2 to the extensions 7 a, b has in each case a slope 14 , so two bends by 45 °.
the yokes 2 are composed of individual, in this form C-shaped, sheets 4 a, b, which are placed inside each other and fit into each other, built.
an outer longitudinal leg 1 a also consists of individual, in this case rectangular, parallel to each other laid sheets.
a middle longitudinal leg 1 b which extends substantially from the inner sides of a yoke 2 in its central region to the inside of the other yoke 2 and also from parallel to each other, not at all interconnected, rectangular sheets 4 x, y and runs parallel to the outer longitudinal limbs 1 a.
an air gap 13 which is obtained in the assembled state of the iron core 24 in particular that plate-shaped spacers 15 whose surface corresponds to the cross-sectional area of the longitudinal limbs 1 a, b, are inserted.
the cross-sectional area of the outer longitudinal limbs 1 a, b is the same and preferably coincides with the cross-sectional area of the central longitudinal limb 1 b, so that the same spacers 15 can be used for all longitudinal limbs, if the thickness of the air gap 13 should also be the same.
Both the central longitudinal limb 1 b and the outer longitudinal limb 1 a can also each consist in their extension direction of several partial longitudinal limbs 1 b 1 , 1 b 2 , as in an alternative embodiment in Figure 2c shown.
Both the structure of the longitudinal limbs of one or more partial longitudinal limbs and the thickness of the spacers 15 depends on the respective intended use of the inductance.
the purpose of the invention is to have as many possible variations as possible the structure and the details of the iron core to have despite an easy to implement construction of the inductance.
one of the plate-shaped spacers 15 are inserted from above into the coil interiors 29 of the bobbin 3 , so that they rest with their main surface on the end face of one of the extensions 7 a, b and thus lie transversely in the coil interior 29 , the Cross sections of the extensions 7 a, b also substantially fill.
the iron core 24 has a measured transversely to its main plane 16 depth which is less than the corresponding extension of the cross section of the coil interior space 29, namely lower by so much that both sides of the iron core 24 are each just a securing strip 12 along each of the longitudinal limb 1 a, b can be interposed, what is now performed as the next step by inserting from above into the coil interior 29th
the securing strips 12 are longer than the central longitudinal leg 1 b, and are pushed in the central bobbin 3 so far down that its lower end extends into the region of the lower yoke 2 .
this represents the form-fitting securing so that, in the assembled state, the middle bobbin 3 can not be pulled out of it transversely to the main plane 16 of the laminated core 24 .
the longitudinal legs 1 a, b are inserted from above into the individual bobbin 3 between the respective two securing strips 12. If one of the longitudinal legs 1 a, b consists of several partial longitudinal limbs 1 b 1 , 1 b 2 , these are used successively , each with the interposition of a spacer 15th
the transversely projecting rear and forward projections 23 a, b of the hat profile have mutually aligned holes 26 through which the two clamping plates 17 can be braced against each other by means of clamping screws 25 , and thereby hold the iron core 24 together.
a further clamping plate 17 are fixed so that the hat-shaped bulges are directed against each other.
This lowermost clamping plate 17 can serve, for example, the screwing against the ground or another machine part.
a support plate may be attached, which protrudes from the cross section of the hat profile of the clamping plate 17 to the side and the fastening of capacitors 30 , which are also required for certain applications of the inductance.
FIGS. 3a c show the assembled state in various views of the inductance according to FIG. 1 ,

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Engineering & Computer Science (AREA)
Power Engineering (AREA)
Chemical & Material Sciences (AREA)
Composite Materials (AREA)
Coils Or Transformers For Communication (AREA)
Filters And Equalizers (AREA)

EP15169708.3A 2014-06-04 2015-05-28 Inductance et son procédé de fabrication Active EP3021332B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102014107829.2A DE102014107829B4 (de)	2014-06-04	2014-06-04	Induktivität sowie Herstellungsverfahren hierfür und Baukasten

Publications (2)

Publication Number	Publication Date
EP3021332A1 true EP3021332A1 (fr)	2016-05-18
EP3021332B1 EP3021332B1 (fr)	2019-09-18

Family

ID=53298157

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP15169708.3A Active EP3021332B1 (fr)	2014-06-04	2015-05-28	Inductance et son procédé de fabrication

Country Status (3)

Country	Link
EP (1)	EP3021332B1 (fr)
DE (1)	DE102014107829B4 (fr)
DK (1)	DK3021332T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102017205751A1 (de) *	2017-04-04	2018-10-04	Siemens Aktiengesellschaft	Elektrisches Gerät mit einem über Jochbolzen am Kessel befestigten Aktivteil
CN110729114A (zh) *	2019-10-28	2020-01-24	江苏龙创电气有限公司	一种具有铁芯更换功能的配电变压器

Citations (10)

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EP0532360A1 (fr) *	1991-09-13	1993-03-17	Vlt Corporation	Transformateur à couplage entre bobines contrôlé et inductances de fuite contrôlées et circuit utilisant un tel transformateur
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JP2006245050A (ja) *	2005-02-28	2006-09-14	Tdk Corp	コイル部品及びリアクトル
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US20100102917A1 (en) *	2004-09-08	2010-04-29	Chun-Tiao Liu	Inductor
US20100321958A1 (en) *	2009-06-17	2010-12-23	Antony Brinlee	Power Converter Employing a Variable Switching Frequency and a Magnetic Device with a Non-Uniform Gap
EP2498266A2 (fr) *	2011-03-08	2012-09-12	Hitachi, Ltd.	Réacteur et transformateur électrique l'utilisant
JP2013172135A (ja) *	2012-02-23	2013-09-02	Fdk Corp	トランス
WO2013183420A1 (fr) *	2012-06-06	2013-12-12	株式会社エス・エッチ・ティ	Dispositif bobine

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US7242275B2 (en) *	2003-02-05	2007-07-10	Paper Quality Management Associates	Variable inductor
CN102306541A (zh) *	2011-05-27	2012-01-04	广东海鸿变压器有限公司	树脂浇注立体卷铁心非晶合金干式变压器

2014
- 2014-06-04 DE DE102014107829.2A patent/DE102014107829B4/de active Active
2015
- 2015-05-28 DK DK15169708T patent/DK3021332T3/da active
- 2015-05-28 EP EP15169708.3A patent/EP3021332B1/fr active Active

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Publication number	Priority date	Publication date	Assignee	Title
DE3414581A1 (de) *	1984-04-17	1985-10-24	Transformatoren Union Ag, 7000 Stuttgart	Drossel mit stirnseitig ueber und unter den wicklungen angeordneten jochen
EP0532360A1 (fr) *	1991-09-13	1993-03-17	Vlt Corporation	Transformateur à couplage entre bobines contrôlé et inductances de fuite contrôlées et circuit utilisant un tel transformateur
US20100102917A1 (en) *	2004-09-08	2010-04-29	Chun-Tiao Liu	Inductor
US20060103496A1 (en) *	2004-11-16	2006-05-18	Jung Fong Electronics Co., Ltd.	Electric component having a variable air gap effect
JP2006245050A (ja) *	2005-02-28	2006-09-14	Tdk Corp	コイル部品及びリアクトル
EP1808872A2 (fr) *	2006-01-17	2007-07-18	Gbe S.R.L.	Système de serrage, compactage et levage pour transformateurs électriques et réacteurs
US20100321958A1 (en) *	2009-06-17	2010-12-23	Antony Brinlee	Power Converter Employing a Variable Switching Frequency and a Magnetic Device with a Non-Uniform Gap
EP2498266A2 (fr) *	2011-03-08	2012-09-12	Hitachi, Ltd.	Réacteur et transformateur électrique l'utilisant
JP2013172135A (ja) *	2012-02-23	2013-09-02	Fdk Corp	トランス
WO2013183420A1 (fr) *	2012-06-06	2013-12-12	株式会社エス・エッチ・ティ	Dispositif bobine

Also Published As

Publication number	Publication date
EP3021332B1 (fr)	2019-09-18
DE102014107829A1 (de)	2016-01-07
DE102014107829B4 (de)	2020-07-30
DK3021332T3 (da)	2019-11-04

Publication	Publication Date	Title
DE2233571C3 (de)	1982-12-30	Spulenkörper, insbesondere für Transformatoren
DE2535653A1 (de)	1976-03-04	Konstantspannungstransformator
DE102008031296A1 (de)	2009-08-20	Drosselspuleneinrichtung für einen Filterschaltkreis sowie Verwendung einer solchen und Filterschaltkreis
DE3305708A1 (de)	1984-08-23	Drehstromdrosselspule mit fuenfschenkelkern
WO2003105328A1 (fr)	2003-12-18	Bobine a compensation de courant et circuit comprenant cette bobine a compensation de courant
DE102016201258A1 (de)	2017-08-03	Elektrischer Spannungswandler mit mehreren Speicherdrosseln
EP2612428A1 (fr)	2013-07-10	Convertisseur multiphase à phases magnétiquement couplées
EP3021332B1 (fr)	2019-09-18	Inductance et son procédé de fabrication
DE102010040205A1 (de)	2012-03-08	Multiphasenwandler
WO2013124298A2 (fr)	2013-08-29	Convertisseur polyphasé
WO2012028540A1 (fr)	2012-03-08	Convertisseur multiphase à phases magnétiquement couplées
DE3508327A1 (de)	1986-09-11	Stromwandler mit einem rechteckigen eisenkern
EP3724899A1 (fr)	2020-10-21	Bobine en mode commun et en mode différentiel pour un véhicule à moteur pouvant fonctionner électriquement
EP3738133B1 (fr)	2023-07-12	Noyau pour un transformateur
DE102012216693A1 (de)	2014-03-20	3-Phasen-Drossel mit Gleichtaktunterdrückungsverbindung
DE102004008961B4 (de)	2005-12-29	Spulenkörper für geschlossenen magnetischen Kern und daraus hergestellte Entstördrossel
EP1722997A1 (fr)	2006-11-22	Pole magnetique pour vehicule a sustentation magnetique
DE3046505C2 (de)	1985-09-19	Saugdrossel für Hochstromtransformatoren
DE4445049C1 (de)	1996-08-14	Isolier- und Abstützanordnung für Wicklungen von Transformatoren und Drosselspulen
DE602004005468T2 (de)	2008-01-03	Induktor
DE3323958A1 (de)	1985-01-10	Transformator mit einem aus blechlamellen zusammengesetzten eisenkern
DE102004056316B4 (de)	2011-12-15	Spulengestell
EP2725589A1 (fr)	2014-04-30	Inductance et son procédé de fabrication
EP4290537A1 (fr)	2023-12-13	Bobine d'inductance et procédé de fabrication d'une telle bobine d'inductance
DE102019135462A1 (de)	2021-06-24	Streufeldtransformator

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