EP0520361B1 - Water cooled inductance for high-current devices - Google Patents
Water cooled inductance for high-current devices Download PDFInfo
- Publication number
- EP0520361B1 EP0520361B1 EP92110534A EP92110534A EP0520361B1 EP 0520361 B1 EP0520361 B1 EP 0520361B1 EP 92110534 A EP92110534 A EP 92110534A EP 92110534 A EP92110534 A EP 92110534A EP 0520361 B1 EP0520361 B1 EP 0520361B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- windings
- winding
- shut
- conductor
- coil
- 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.)
- Expired - Lifetime
Links
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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/16—Water cooling
-
- 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
- H01F27/2876—Cooling
Definitions
- the invention relates to a water-cooled choke for high-current systems, consisting of a coil formed by a plurality of turns of a conductor having a hollow profile with a rectangular cross section and insertable into the current path and into the cooling water circuit, the turns of which enclosing a rectangle are composed of conductor sections corresponding to the edges of the rectangle .
- Such a coil forming the secondary turns of a transformer can be found in CH-A-368 541.
- the windings of the coil are combined here by connecting pipes for the coolant supply and discharge, starting from the free ends of the windings and oriented towards the corresponding free ends of the following turn, likewise the windings are electrically connected to one another via their end regions. This is a structurally complex design of such a coil.
- the chokes here consist of coils formed from copper or aluminum tubes, the turns of which are fixed in their position relative to one another.
- the conductor from which the coil is formed must, in terms of cross section, be designed for the maximum current load.
- the conductor cross section must allow the formation of the coil turns. At higher current loads, this means that two parallel conductor strands are formed into an outer and an inner coil, whereby additional measures must be taken to ensure that both conductor strands have the same length, for example by twisting the inner conductor strand. It is a very complex production.
- the invention is based on the need for a water-cooled choke for high-current systems which can be manufactured more easily and therefore also more cost-effectively.
- the new choke the characteristic features of which is, on the one hand, the transition of the conductor section that completes one turn into the next turn that extends parallel to the previous turn and, on the other hand, the shifting of the turns in from turn to turn, starting with the turn following the initial turn the escape of one of the diagonals running through opposite corners of the turns by the width of the conductor plus a play permits one with easy access to the joints of the conductor sections forming the coil turns by using endless material extraordinarily efficient production of choke coils. There are then no limits to the choice of the conductor cross section, so that even with a choke to be designed for a higher current load, a coil having a corresponding conductor cross section is sufficient.
- US-A-1,723,840 shows a transformer coil made of flat material which forms the secondary winding and in which the conductor section which completes one turn merges into the following turn which extends parallel to the previous turn and is flush with the previous turn.
- the choke in FIGS. 1 and 2 has 13 turns, its input is designated E, its output is A.
- the turns of the coil forming the choke are each formed by 4 conductor sections, the 13 turns comprising coil of a total of 52 sections, which are numbered consecutively from 1 to 52.
- the successive turns of the coil are alternately offset in the direction of arrows C, C '.
- D are stiffeners, with F abutments on which the throttle rests. These abutments F are of course not conductive.
- the required summary of the turns of the choke coil is not shown, this results from the further exemplary embodiment.
- the inductor 11 has turns, its input is also designated E in FIG. 4, and its output is also referred to A.
- the turns of this inductor are also composed of 4 conductor sections each, which have Miter cut welded together (B in Fig. 4) again border a rectangle.
- the transition from one turn into the following turn takes place via a step G in the last of the conductor sections forming a turn, which is formed by a conductor piece I inserted between the sections H, H 'of this conductor section.
- the successive turns in the sense of arrows C, C 'in FIG. 4 are mutually offset.
- the turns of the raised (K) choke are summarized by clamping screws L, L ', which, starting from the stands K, extend through a base plate M, inserted between the individual turns spacer plates N and a cover plate O, the spacer plates N made of non-conductive material exist and are inserted between base plate M and adjacent turn and cover plate O and adjacent turn plates P made of non-conductive material, and the bolts L of the clamping screws L, L 'are stored in sleeves R made of non-conductive material (Fig. 5), the latter for safety reasons.
- 5 in FIG. 5 denotes the channels for the cooling water which extend through the conductor
- T in FIG. 3 denotes a compensating plate.
- In the intersection-free corner area instead of the plates M, N, O and P webs are provided for the combination of the coil turns, through which the clamping screws extend (FIG. 4).
- the illustrated embodiments do not exclude other solutions while maintaining the basic principle. So can the conductor of rectangular cross section, which is generally formed from a drawn profile, can also be formed from a plurality of tubes which are arranged next to one another and are welded to one another. Other solutions are also possible with regard to the combination of the coil turns.
Abstract
Description
Die Erfindung betrifft eine wassergekühlte Drossel für Hochstromanlagen, bestehend aus einer von einer Mehrzahl von Windungen eines ein Hohlprofil rechteckigen Querschnitts aufweisenden Leiters gebildeten, in den Strompfad und in den Kühlwasserkreislauf einfügbaren Spule, deren ein Rechteck einschließende Windungen aus den Kanten des Rechtecks entsprechenden Leiterabschnitten zusammengesetzt sind.The invention relates to a water-cooled choke for high-current systems, consisting of a coil formed by a plurality of turns of a conductor having a hollow profile with a rectangular cross section and insertable into the current path and into the cooling water circuit, the turns of which enclosing a rectangle are composed of conductor sections corresponding to the edges of the rectangle .
Eine solche die Sekundärwindungen eines Transformators ausbildende Spule ist der CH-A-368 541 zu entnehmen. Die Windungen der Spule sind hierbei durch von den freien Enden der Windungen ausgehende, auf die entsprechenden freien Enden der folgenden Windung orientierte Verbindungsrohre für die Kühlmittelzu- und -ableitung zusammengefaßt, gleichermaßen sind die Windungen über ihre Endbereiche elektrisch miteinander verbunden. Hierbei handelt sich um eine konstruktiv aufwendige Ausbildung einer solchen Spule.Such a coil forming the secondary turns of a transformer can be found in CH-A-368 541. The windings of the coil are combined here by connecting pipes for the coolant supply and discharge, starting from the free ends of the windings and oriented towards the corresponding free ends of the following turn, likewise the windings are electrically connected to one another via their end regions. This is a structurally complex design of such a coil.
Solche Spulen werden, die Funktion einer Drossel erfüllend, dann auch in die Strompfade von Elektroöfen eingefügt. Nach dem Stand der Technik bestehen die Drosseln hierbei aus aus Kupfer- bzw. Aluminiumrohren gebildeten Spulen, deren Windung in ihrer Lage zueinander fixiert sind. Der Leiter, aus dem die Spule gebildet wird, muß, was den Querschnitt betrifft, auf die maximale Strombelastung ausgelegt sein. Der Leiterquerschnitt muß allerdings die Bildung der Spulenwindungen zulassen. Das läuft bei höheren Strombelastungen darauf hinaus, daß zwei parallel zueinander verlaufende Leiterstränge zu einer äußeren und einer inneren Spule ausgeformt werden, wobei zusätzliche Maßnahmen getroffen werden müssen, die sicherstellen, daß beide Leiterstränge die gleiche Länge aufweisen, etwa indem der innere Leiterstrang verwunden wird. Es handelt sich hierbei um eine sehr aufwendige Fertigung.Such coils, which fulfill the function of a choke, are then also inserted into the current paths of electric furnaces. According to the prior art, the chokes here consist of coils formed from copper or aluminum tubes, the turns of which are fixed in their position relative to one another. The conductor from which the coil is formed must, in terms of cross section, be designed for the maximum current load. The conductor cross section must allow the formation of the coil turns. At higher current loads, this means that two parallel conductor strands are formed into an outer and an inner coil, whereby additional measures must be taken to ensure that both conductor strands have the same length, for example by twisting the inner conductor strand. It is a very complex production.
Ausgegehend vom Stand der Technik liegt der Erfindung das Bedürfnis nach einer wassergekühlten Drossel für Hochstromanlagen zugrunde, die sich leichter und damit dann auch kostengünstiger fertigen läßt.Starting from the prior art, the invention is based on the need for a water-cooled choke for high-current systems which can be manufactured more easily and therefore also more cost-effectively.
Dem Bedürfnis wird mit der im Patentanspruch 1 definierten Drossel für Hochstromanlagen Rechnung getragen.The need is met with the choke defined in
Die neue Drossel, deren kennzeichnende Merkmale zum einen der Übergang des eine Windung vollendenden Leiterabschnitts in die folgende sich parallel zur vorausgehenden Windung erstreckende Windung ist und zum anderen der, beginnend mit der auf die Ausgangswindung folgenden Windung, von Windung zu Windung wechselnde Versatz der Windungen in der Flucht einer der durch gegenüberliegende Ecken der Windungen verlaufenden Diagonalen um die Breite des Leiters zuzüglich eines Spieles, gestattet bei leichter Zugänglichkeit der stoßstellen der die Spulenwindungen ausbildenden Leiterabschnitte unter Rückgriff auf Endlosmaterial eine außerordentlich rationelle Fertigung der Drosselspulen. Der Wahl des Leiterquerschnitts sind dann auch keine Grenzen gesetzt, so daß man auch bei einer auf eine höhere Strombelastung auszulegenden Drossel mit einer einen entsprechenden Leiterquerschnitt aufweisenden Spule auskommt.The new choke, the characteristic features of which is, on the one hand, the transition of the conductor section that completes one turn into the next turn that extends parallel to the previous turn and, on the other hand, the shifting of the turns in from turn to turn, starting with the turn following the initial turn the escape of one of the diagonals running through opposite corners of the turns by the width of the conductor plus a play permits one with easy access to the joints of the conductor sections forming the coil turns by using endless material extraordinarily efficient production of choke coils. There are then no limits to the choice of the conductor cross section, so that even with a choke to be designed for a higher current load, a coil having a corresponding conductor cross section is sufficient.
Eine die Sekundärwicklung ausbildende Transformatorspule aus Flachmaterial, bei der der eine Windung vollendende Leiterabschnitt in die folgende, sich parallel zur vorausgehenden Windung erstreckende, mit der vorausgehenden Windung fluchtende Windung übergeht, ist der US-A-1,723,840 zu entnehmen.US-A-1,723,840 shows a transformer coil made of flat material which forms the secondary winding and in which the conductor section which completes one turn merges into the following turn which extends parallel to the previous turn and is flush with the previous turn.
Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.
Figur 1- eine erste Ausführungsform der neuen Drossel in Seitenansicht,
- Figur 2
- die Drossel in Fig. 1 in Draufsicht,
Figur 3- eine zweite Ausführungsform der neuen Drossel im Schnitt nach Linie III - III in Fig. 4,
Figur 4- die Drossel in Fig. 3 in Draufsicht,
Figur 5- einen Schnitt nach Linie V - V in Fig. 4 in größerem Maßstab.
- Figure 1
- a first embodiment of the new throttle in side view,
- Figure 2
- 1 in top view,
- Figure 3
- 4 shows a second embodiment of the new throttle in section along line III-III in FIG.
- Figure 4
- 3 in top view,
- Figure 5
- a section along line V - V in Fig. 4 on a larger scale.
Die Drossel in den Figuren 1 und 2 weist 13 Windungen auf, ihr Eingang ist mit E bezeichnet, ihr Ausgang mit A. Wie aus Fig. 2 ersichtlich ist, werden die Windungen der die Drossel bildenden Spule von jeweils 4 Leiterabschnitten gebildet, die 13 Windungen aufweisende Spule von insgesamt 52 Abschnitten, die fortlaufend von 1 bis 52 durchnummeriert sind. Die von den auf Gehrung geschnittenen, miteinander verschweißten (B) Leiterabschnitten, z.B. 1 - 4, gebildeten Windungen schließen Rechtecke ein, der jeweils letzte Leiterabschnitt einer Windung, z.B. 4, geht in den ersten Leiterabschnitt, z.B. 5, der folgenden Windung über. Aus fertigungstechnischen Gründen sind die aufeinanderfolgenden Windungen der Spule im Wechsel im Sinne der Pfeile C, C′ zueinander versetzt. Mit D sind Aussteifungen bezeichnet, mit F Widerlager, auf denen die Drossel ruht. Diese Widerlager F sind selbstverständlich nichtleitend. Nicht dargestellt ist die erforderliche Zusammenfassung der Windungen der Drosselspule, diese ergibt sich aus dem weiteren Ausfürungsbeispiel.The choke in FIGS. 1 and 2 has 13 turns, its input is designated E, its output is A. As can be seen from FIG. 2, the turns of the coil forming the choke are each formed by 4 conductor sections, the 13 turns comprising coil of a total of 52 sections, which are numbered consecutively from 1 to 52. The turns formed by the miter-cut, welded (B) conductor sections, for example 1-4, enclose rectangles, the last conductor section of one turn, for example 4, merges into the first conductor section, for example 5, of the following turn. For manufacturing reasons, the successive turns of the coil are alternately offset in the direction of arrows C, C '. With D are stiffeners, with F abutments on which the throttle rests. These abutments F are of course not conductive. The required summary of the turns of the choke coil is not shown, this results from the further exemplary embodiment.
Bei dem Ausführungsbeispiel nach den Figuren 3 bis 5 weist die Drossel 11 Windungen auf, ihr Eingang ist in Figur 4 auch wieder mit E bezeichnet, ihr Ausgang auch wieder mit A. Die Windungen dieser Drossel sind auch wieder aus jeweils 4 Leiterabschnitten zusammengesetzt, die auf Gehrung geschnitten miteinander verschweißt (B in Fig. 4) auch wieder ein Rechteck einfassen. In diesem Falle erfolgt der Übergang von einer Windung in die folgende Windung über eine Stufe G im letzten der eine Windung bildenden Leiterabschnitte, die durch ein zwischen die Teilstücke H, H′ dieses Leiterabschnittes eingefügtes Leiterstück I gebildet wird. Auch in diesem Fall sind die aufeinander folgenden Windungen im Sinne der Pfeile C, C′ in Fig. 4 im Wechsel zueinander versetzt. Die Windungen der aufgeständerten (K) Drossel sind durch Spannschrauben L, L′ zusammengefaßt, die von den Ständern K ausgehend, sich durch eine Grundplatte M, zwischen die einzelnen Windungen einfügte Distanzplatten N und eine Abdeckplatte O erstrecken, wobei die Distanzplatten N aus nichtleitendem Material bestehen und zwischen Grundplatte M und angrenzende Windung sowie Abdeckplatte O und angrenzende Windung Platten P aus nichtleitendem Material eingefügt sind, sowie die Bolzen L der Spannschrauben L, L′ in Hülsen R aus nichtleitendem Material eingelagert sind (Fig. 5), letzteres aus Sicherheitsgründen. Mit S sind in Fig. 5 die sich durch den Leiter erstreckende Kanäle für das Kühlwasser bezeichnet, mit T in Fig. 3 eine Ausgleichsplatte. Im kreuzungsfreien Eckbereich sind für die Zusammenfassung der Spulenwindungen anstelle der Platten M, N, O und P Stege vorgesehen, durch die sich die Spannschrauben erstrecken (Fig. 4).In the exemplary embodiment according to FIGS. 3 to 5, the
Die dargestellten Ausführungsformen schließen andere Lösungen unter Beibehaltung des Grundprinzips nicht aus. So kann der in der Regel aus einem Ziehprofil gebildete Leiter rechteckigen Querschnitts auch aus einer Mehrzahl von nebeneinander einander berührend angeordneten, miteinander verschweißten Rohren gebildet werden. Auch was die Zusammenfassung der Spulenwindungen betrifft, sind andere Lösungen möglich.The illustrated embodiments do not exclude other solutions while maintaining the basic principle. So can the conductor of rectangular cross section, which is generally formed from a drawn profile, can also be formed from a plurality of tubes which are arranged next to one another and are welded to one another. Other solutions are also possible with regard to the combination of the coil turns.
Claims (8)
- Water-cooled shut-off means for heavy-current systems, comprising a coil, which is formed from a plurality of windings of a conductor having a hollow profile with a rectangular cross-section, and which is insertable in the current path and in a water-cooling circuit, the windings (e.g. 1, 2, 3, 4) of said coil forming a rectangle and being composed of conductor portions which correspond to the sides of the rectangle, characterised in that the conductor portion (e.g. 4), which completes a winding, leads into the following winding (5, 6, 7, 8) extending parallel to the preceding winding (1, 2, 3, 4), and the windings, commencing with the winding (5, 6, 7, 8) following the initial winding (1, 2, 3, 4), are offset by the width of the conductor plus some clearance in alignment with one of the diagonals extending through oppositely situated corners of the windings (arrow C) and subsequently offset back again (arrow C′).
- Shut-off means according to claim 1, characterised by the conductor portion (4), which completes a winding (e.g. 1, 2, 3, 4), leading continuously into the following winding (5, 6, 7, 8).
- Shut-off means according to claim 1, characterised in that the conductor portion, which leads into the following winding, has a step (G) (Fig. 3).
- Shut-off means according to claim 3, characterised in that the step (G) is formed from a conductive element (I), which is inserted in the stepped conductor portion (H, H′).
- Shut-off means according to one of claims 1 to 4, characterised in that the conductor portions (e.g. 1, 2, 3, 4), as well as possibly the parts (H and H′) of the conductor portion (H, H′), which leads into the following winding, and the connector element (I) are cut in a bevelled manner, joined together and welded to one another (B).
- Shut-off means according to one of claims 1 to 5, characterised in that the windings (1, 2, 3, 4, and 5, 6, 7, 8 ...) are assembled in the corner regions of the windings.
- Shut-off means according to claim 6, characterised by an assembly by means of clamping bolts (L, L′), which extend from a base plate (M), which is insulated from the adjacent winding, through spacer plates (N), which are inserted between the windings in their junction region and are insulated from the windings, and a cover plate (O, P), which surrounds the coil and is insulated from the adjacent winding.
- Shut-off means according to claim 6, characterised in that the windings are assembled at least in the region of the junction-free corner by means of clamping bolts, which extend from base webs, which are insulated from the adjacent windings, through spacer webs, which are inserted at both sides of the junction-free corner between the windings and are insulated from the windings, and cover webs, which surround the coil and are insulated from the adjacent windings, a compensating member being provided in the region of the winding which extends back into the coil interior.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4121204 | 1991-06-27 | ||
| DE4121204A DE4121204A1 (en) | 1991-06-27 | 1991-06-27 | WATER-COOLED THROTTLE FOR HIGH CURRENT SYSTEMS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0520361A1 EP0520361A1 (en) | 1992-12-30 |
| EP0520361B1 true EP0520361B1 (en) | 1995-12-13 |
Family
ID=6434847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92110534A Expired - Lifetime EP0520361B1 (en) | 1991-06-27 | 1992-06-23 | Water cooled inductance for high-current devices |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0520361B1 (en) |
| AT (1) | ATE131656T1 (en) |
| DE (2) | DE4121204A1 (en) |
| ES (1) | ES2082281T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295742A (en) * | 2013-05-30 | 2013-09-11 | 浙江金华巨能电子科技有限公司 | Secondary coil of transformer of welding machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19814896A1 (en) * | 1998-04-02 | 1999-07-08 | Vacuumschmelze Gmbh | Electrical power transformer for high current of at least 1 kHz |
| US6208095B1 (en) * | 1998-12-23 | 2001-03-27 | Axcelis Technologies, Inc. | Compact helical resonator coil for ion implanter linear accelerator |
| DE102018109565A1 (en) * | 2018-04-20 | 2019-10-24 | Block Transformatoren-Elektronik Gmbh | coil assembly |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1723840A (en) * | 1928-12-14 | 1929-08-06 | Gen Electric | Transformer |
| FR794950A (en) * | 1934-07-25 | 1936-02-28 | Siemens Ag | Tubular coil made in particular with rectangular or square conductors, particularly intended for transformers |
| DE668753C (en) * | 1935-11-26 | 1938-12-12 | Aeg | High current flowing through inductance for high or audio frequency blocks |
| DE842083C (en) * | 1950-06-15 | 1952-06-23 | Chemische Werke Huels G M B H | Short-circuit current limiting reactor |
| GB857444A (en) * | 1958-03-12 | 1960-12-29 | Gen Electric Co Ltd | Improvements in or relating to laminated electro-magnetic cores |
| CH368541A (en) * | 1959-02-02 | 1963-04-15 | Schlatter Ag | transformer |
| US3146300A (en) * | 1959-09-18 | 1964-08-25 | Asea Ab | Corona protection screen for inductor coils in vacuum furnaces |
| FR1308052A (en) * | 1961-09-22 | 1962-11-03 | Comp Generale Electricite | Winding for transformer |
| CH423962A (en) * | 1965-07-28 | 1966-11-15 | Bbc Brown Boveri & Cie | Single-layer rectangular coil made of metal strip, in particular for synchronous electric machines |
| DE1301405B (en) * | 1968-01-31 | 1969-08-21 | Bbc Brown Boveri & Cie | Multi-part inductor |
| GB1470902A (en) * | 1975-02-28 | 1977-04-21 | Tioxide Group Ltd | Electrical series reactor |
| DE2854520A1 (en) * | 1978-12-16 | 1980-06-26 | Bbc Brown Boveri & Cie | ELECTRIC COIL |
| FR2454678A1 (en) * | 1979-04-20 | 1980-11-14 | Alsthom Atlantique | Inductance for high electric current with many harmonics - has low wt. and bulk, and is suitable for use with power thyristors |
| US4488135A (en) * | 1982-07-29 | 1984-12-11 | Schwartz Charles A | Transformer for welding gun |
| SU1356017A1 (en) * | 1985-09-23 | 1987-11-30 | Производственное объединение "Запорожтрансформатор" им.В.И.Ленина | Continuous winding of transformer |
-
1991
- 1991-06-27 DE DE4121204A patent/DE4121204A1/en active Granted
-
1992
- 1992-06-23 DE DE59204651T patent/DE59204651D1/en not_active Expired - Fee Related
- 1992-06-23 EP EP92110534A patent/EP0520361B1/en not_active Expired - Lifetime
- 1992-06-23 AT AT92110534T patent/ATE131656T1/en not_active IP Right Cessation
- 1992-06-23 ES ES92110534T patent/ES2082281T3/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295742A (en) * | 2013-05-30 | 2013-09-11 | 浙江金华巨能电子科技有限公司 | Secondary coil of transformer of welding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4121204C2 (en) | 1993-06-17 |
| EP0520361A1 (en) | 1992-12-30 |
| ATE131656T1 (en) | 1995-12-15 |
| DE4121204A1 (en) | 1993-01-14 |
| DE59204651D1 (en) | 1996-01-25 |
| ES2082281T3 (en) | 1996-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE19519594A1 (en) | Electrical transformer with overlapping primary and secondary windings | |
| DE69723435T2 (en) | CONTROLLABLE INDUCTOR | |
| DE102016201258A1 (en) | Electric voltage converter with several storage chokes | |
| EP1610350A2 (en) | Welding transformer | |
| DE112016001433B4 (en) | Isolation type step-down converter | |
| EP0782755B1 (en) | Power supply conductor from the conductive foil of the foil winding of a power transformer | |
| EP0520361B1 (en) | Water cooled inductance for high-current devices | |
| DE102010040205A1 (en) | Multiphase converters | |
| DE2417125C3 (en) | Power transformer | |
| DE2328024C3 (en) | Medium-frequency power transformer with a secondary winding suitable for rigid connection to an inductor through which coolant flows | |
| EP2975618B1 (en) | Core for an electrical induction device | |
| EP0583644B1 (en) | Choke | |
| CH643679A5 (en) | High-current inductor coil | |
| EP0222687B1 (en) | Current transformer for a protective switch | |
| DE970447C (en) | Choke coil | |
| DE1239773B (en) | Folded windings for transformers, choke coils and similar induction devices are printed on a band-shaped carrier made of insulating material | |
| DE2904746C3 (en) | Winding for an air-cooled dry-type transformer | |
| DE2219355C3 (en) | Transformer with a flat design | |
| EP0102941B1 (en) | Winding with transposed conductors | |
| AT91774B (en) | Arrangement for reducing the current displacement of conductors embedded in grooves in electrical machines. | |
| EP0012739A1 (en) | Choke | |
| WO2022263221A1 (en) | Matrix transformer | |
| DE1933696U (en) | TRANSFORMER. | |
| CH390373A (en) | Bar winding for AC machines with concentric coils | |
| DE1153830B (en) | Magnetic core made of stacked E-shaped and I-shaped sheet metal sections for a transformer or a coil and process for the production of this core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI NL PT SE |
|
| 17P | Request for examination filed |
Effective date: 19921126 |
|
| 17Q | First examination report despatched |
Effective date: 19940114 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI NL PT SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19951213 Ref country code: DK Effective date: 19951213 Ref country code: BE Effective date: 19951213 |
|
| REF | Corresponds to: |
Ref document number: 131656 Country of ref document: AT Date of ref document: 19951215 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 59204651 Country of ref document: DE Date of ref document: 19960125 |
|
| ITF | It: translation for a ep patent filed |
Owner name: DE DOMINICIS & MAYER S.R.L. |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: HEPP, WENGER & RYFFEL AG |
|
| ET | Fr: translation filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Effective date: 19960313 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2082281 Country of ref document: ES Kind code of ref document: T3 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19960319 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20030626 Year of fee payment: 12 Ref country code: GB Payment date: 20030626 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20030630 Year of fee payment: 12 Ref country code: FR Payment date: 20030630 Year of fee payment: 12 Ref country code: ES Payment date: 20030630 Year of fee payment: 12 Ref country code: AT Payment date: 20030630 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20030826 Year of fee payment: 12 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040623 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040623 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040624 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040624 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040630 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040630 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050101 |
|
| EUG | Se: european patent has lapsed | ||
| EUG | Se: european patent has lapsed | ||
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20040623 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050228 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20050101 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050623 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20040624 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20051228 Year of fee payment: 14 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070103 |