EP0540958B1 - Inductance toroidale - Google Patents

Inductance toroidale Download PDF

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Publication number
EP0540958B1
EP0540958B1 EP92118169A EP92118169A EP0540958B1 EP 0540958 B1 EP0540958 B1 EP 0540958B1 EP 92118169 A EP92118169 A EP 92118169A EP 92118169 A EP92118169 A EP 92118169A EP 0540958 B1 EP0540958 B1 EP 0540958B1
Authority
EP
European Patent Office
Prior art keywords
partial windings
partial
toroidal inductor
winding
inductor according
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
Application number
EP92118169A
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German (de)
English (en)
Other versions
EP0540958A1 (fr
Inventor
Peter Etter
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.)
ABB Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0540958A1 publication Critical patent/EP0540958A1/fr
Application granted granted Critical
Publication of EP0540958B1 publication Critical patent/EP0540958B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2895—Windings disposed upon ring cores
    • 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
    • H01F37/005—Fixed inductances not covered by group H01F17/00 without magnetic core

Definitions

  • the invention is based on a toroidal throttle according to the preamble of patent claim 1.
  • the invention relates to a prior art, as is known from DE-AS 1 115 829.
  • the high-voltage choke coil specified there with a solid material winding consisting of 2 parallel partial conductors with 8 turns around a ring-shaped iron core the partial conductors have slots lying one above the other perpendicular to the surface of the iron core and not made to the edge of the partial conductor, in order to reduce eddy current losses.
  • These partial conductors do not have any notable area-like support and there is no peripheral clamping.
  • a ring transformer is known in which the winding conductors of the primary windings and the secondary windings are designed in a sector-shaped cross-section and alternately windings of the primary and secondary windings lie side by side in the circumferential direction.
  • the secondary windings are liquid cooled.
  • Inner conductor sections of the primary and secondary winding have a greater radial height than the outer conductor sections.
  • the one into a ring interconnected transformer coils are housed in a jacket.
  • This throttle structure requires a relatively large volume. In the event of a short circuit, the stability and mutual support of the winding parts are unsatisfactory.
  • a commutation choke for converter systems made of twisted stranded wires is known, in which the non-segmented turns of the coil consist of many conductor strands which are interwoven in a tubular manner.
  • the cross section of the tubular conductor is compressed into the shape of a rectangle.
  • Several tubular or rectangular conductors can be arranged concentrically to one another.
  • a toroidal air choke coil which has a medium inductance and can be loaded with a current which is strongly affected by harmonics.
  • Such chokes are used as swinging and quenching chokes in power converters of mass transit vehicles.
  • Such a choke is not suitable for short-circuit currents of the order of 100 kA - 140 kA, as can occur in high-performance converters due to ignition.
  • Such short-circuit currents can, for. B. occur when in a bridge circuit 2 belonging to the same phase unintentionally or incorrectly ignite simultaneously and thus short-circuit the intermediate circuit capacitor of a converter with a DC intermediate circuit.
  • the invention solves the problem of further developing a toroidal choke of the type mentioned at the outset in such a way that it can be used for currents of 100 100 kA and has a minimal volume and small losses.
  • An advantage of the invention is that the segment throttle can be connected in series or in parallel from a plurality of segments of a toroid or annular bead after the windings have been assembled. Relatively dimensionally stable segments with high current carrying capacity can be used, which do not have to be able to be wound. A high mechanical strength of the toroidal choke can thus be achieved.
  • the toroidal choke is easy to assemble, while ensuring a high short-circuit strength.
  • a given installation volume can be better used, whereby the geometry of the toroidal choke can be reproduced very precisely.
  • the number of turns and thus the inductance of the toroidal choke can be easily changed or set.
  • the copper used for the segments can be stressed up to several times its yield point.
  • a high fill factor with a large passage area for the magnetic field can be achieved with minimal leakage flux.
  • a modular choke structure is possible by choosing more or fewer turns or radially offset turns.
  • the chokes can be rectangular on the outside. Natural or liquid cooling with forced circulation, e.g. Oil cooling are possible.
  • (1) denotes a partial toroidal choke, which is constructed from a plurality of U-shaped winding elements or segmented partial windings (2).
  • the partial windings (2) are arranged in a ring around a central, cylindrical recess (6) and each have a lower leg (2a) and an upper leg (2b).
  • the partial windings (2) At the inner edge (4), the partial windings (2) have a width a that is smaller than a width b on their outer edge (5).
  • the two legs (2a, 2b) have a height c near the inner edge (4) which is greater than their height d on the outer edge (5).
  • the widths a and b are dimensioned so that the available volume for the toroidal choke (1) is used well.
  • the associated heights c and d are dimensioned such that a current cross-sectional area through each partial winding (2) is the same.
  • electrical connecting elements (3) connect the individual partial windings (2) to form a single toroidal turn or connect them in series.
  • the toroidal choke (1) has 360 / ⁇ partial windings, where ⁇ denotes a segment pitch angle measured in degrees.
  • FIG. 2 shows a section around a central recess (6) of a plurality of separate segmented partial windings arranged in a circle, the partial windings (7 - 9) adjacent to one another having a different length (1) in the radial direction.
  • Such a staggering enables a high element density or number of turns of the toroidal choke (1) to be achieved. In this way, a high fill factor can be obtained with a large conductor cross section.
  • Fig. 3 shows a detail of a toroidal choke (1) with a plurality of partial windings (10), which have different lengths in the radial direction and rectangular boundaries along the perpendicular surfaces (11, 12) on the outer edge.
  • the toroidal throttle (1) can be adapted to a given volume.
  • the external boundary also z. B. 5-sided, 6-sided, etc. could be selected.
  • Fig. 4 shows a U-shaped partial winding (13) with 2 symmetrical, angled connecting elements (13a, 13b) which have an internal angle ( ⁇ ) in the range of 90 ° - 150 °, preferably in the range of 100 ° - 130 ° between them lock in.
  • Such partial windings (13) can, for. B. made of aluminum or copper, made as flat sheet metal cuts and used in multiple layers if necessary.
  • Fig. 5 shows a partial winding or a winding element (14) with several serpentine windings arranged one above the other, which are mutually insulated by means of electrically insulating spacers or insulators (15).
  • the reference number (16) denotes one Connection area and the reference number (17) an externally folded and insulated connection end.
  • Fig. 6 shows a partial winding (18) in an angular profile with chamfered inner corners (18a) and enlarged outer surfaces, which are obtained by bending from a sheet metal cut. (19) denotes connection areas for a screw connection, not shown. With similar geometry, massive partial windings (18) z. B. cast, pressed or deep drawn.
  • Fig. 7a shows a partial winding (20) made of stranded wire, which is cast with a thermal resin to form a compact, dimensionally stable element.
  • (21) a connection profile is designated.
  • Fig. 7b shows a sectional view along a line A-A in Fig. 7a.
  • a partial winding (20) can also be produced from individual sheet metal strips by gluing, the sheet metal strips crumpling, i. H. are twisted so that the outer sheet metal strips come cyclically inwards and the inner ones outwards. A small current displacement is thus achieved.
  • FIG. 8 shows a toroidal choke (1) with a plurality of winding segments or partial windings (22), each separated by insulating foils or insulating layers (23), which are arranged in a circle around the central recess (6) and whose geometry can be better seen in FIG. 10 are.
  • the segment pitch angle is again designated with ⁇ .
  • 2 separately designed power connection elements (30) and (31) are attached, which can be seen better in FIG. 9.
  • the insulating film (23) is slotted in the outer area as seen in the radial direction, so that there it has an upper and lower insulating film section (23a, 23b), which sections in FIG.
  • the power connector (30) forms z. B. the beginning of the overall winding and the power connector (31), the z. B. could also be led out horizontally, the end.
  • FIG. 9 shows the toroidal choke (1) according to FIG. 8 in a vertical cross section through its center and additionally a central clamping bolt (28) in the recess (6), upper and lower insulating plates (25), an upper disk-shaped clamping plate (26) , a lower disc-shaped clamping plate (27) and an electrically insulated pressure bandage (29) around the central part of the torus, d. H. around an outer edge (41) of the partial windings (22).
  • the high-strength tensioning structure made of steel or a glass fiber material, is designed in such a way that it can absorb the majority of the expansion forces of the winding that occur during a surge current load. (In the case of partial windings from a simple sheet metal cut, the insulating plates (25) would be provided with radial grooves.)
  • the central clamping bolt (28) is connected to steel disc-shaped clamping plates (26, 27) by thread.
  • the clamping bolt (28) has a central cavity or coolant channel (28a) in its interior. It is electrically insulated from the partial windings (22) by insulating rings (24).
  • a coolant inflow channel (34) and a coolant outflow channel (35) can be provided in a partial winding (2).
  • the arrows show the direction of flow of the coolant.
  • coolant can be drawn into the interior of the toroidal throttle (1) through slot-shaped openings or coolant inflow channels (32), and from there through coolant outflow channels (33) and the coolant channel (28a) inside the clamping bolt (28) get outside.
  • the current heat to be dissipated can alternatively or additionally also be dissipated to the surroundings by means of cooling fins (not shown). Transition points to an adjacent, partial winding (22) lying behind are identified by (39).
  • FIG. 10 shows a segment or a partial winding (22) of the toroidal choke (1) according to FIG. 8 from a solid winding in a perspective view in detail.
  • the partial winding (22) has a 1st or initial connection piece (36) and a 2nd or end connection piece (37) with a lateral, vertical pressure contact surface (37 ') and a horizontal contact surface (37'') through a recess (38) are spaced apart.
  • the upper insulating film section (23a) is pushed into this recess (38) during assembly of the toroidal choke (1).
  • the remaining part of the insulating film (23) serves for the electrical insulation of a partial winding (22) from the neighboring one, cf. 8 and 11.
  • An electrical connection is guaranteed by the contact pressure.
  • start and end connecting pieces (36, 37) fit to one another or are designed to be complementary to one another, so that area contact is ensured when adjacent partial windings (22) are applied.
  • Relatively thick partial windings (22) can be produced in the desired, spread shape by casting.
  • Flat partial windings (22) can be made from an annular disc by cutting along a cutting line leading from the inside outwards z. B. by means of a laser beam and subsequent bending or spreading.
  • Adjacent partial windings (22) are then soldered or preferably welded along these cutting lines in order to obtain an overall winding.
  • Fig. 12 shows a section of a partial winding (39) with a flat design and enlarged outer surfaces to reduce high-frequency losses.
  • An arrow (B) points in the direction of the connection point, not shown.
  • the connecting elements can be soft-soldered, hard-soldered or welded. Press and screw connections are suitable for solid partial windings.
  • the partial windings (2) are inserted one after the other radially into a winding body, not shown, and the contact points z. B. fixed by screws.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (10)

  1. Inductance toroïdale (1)
    a) en plusieurs parties de bobinages respectivement en bobinages partiels (2, 7 - 10, 13, 18, 22, 39), disposés côte à côte en tore,
    b) dont chaque bobinage partiel présente au moins une spire et
    c) avec au moins un élément de liaison (3 ; 36 ; 37) pour le branchement en série et/ou en parallèle des bobinages partiels qui sont en liaison électrique,
    d) avec lequel la largeur (a) des membres (2a, 2b) des bobinages partiels (2) sont plus petit dans un périmètre central intérieur (4) du tore, que la largeur (b) au bord extérieur (5) de la périphérie
    caractérisée en ce que,
    e) les bobinages partiels (2) présentent selon leur longueur une surface de coupe transversale au moins approximativement constante et
    f) sont entourés d'un bandage de contrainte périphérique (29).
  2. Inductance toroïdale selon la revendication 1, caractérisée en ce que la hauteur (c) des membres (2a, 2b) dans le périmètre intérieur central (4) est supérieure à la hauteur (d) au bord périphérique extérieur (5) du tore.
  3. Inductance toroïdale selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que des membres voisins de bobinages partiels (7 - 10) présentent des longueurs différentes, mesurées du périmètre intérieur central (4) vers le bord périphérique extérieur (5, 11, 12) du tore.
  4. Inductance toroïdale selon l'une quelconque des revendications 1 à 3, caractérisée en ce que
    a) la périphérie du tore est anguleuse,
    b) notamment délimitée par un rectangle (11, 12)
  5. Inductance toroïdale selon l'une quelconque des revendications 1 à 4, caractérisée en ce que
    a) le bobinage partiel (18) présente un profil de boîte avec des angles intérieurs (18a) arrondis ou chanfreinés,
    b) notamment en ce que les surfaces extérieures des bobinages partiels (18) sont agrandies par rapport à leurs surfaces intérieures,
  6. Inductance toroïdale selon l'une quelconque des revendications 1 à 4, caractérisée en ce que
    a) les bobinages partiels (13) présentent 2 éléments de liaison (13a, 13b) qui forment mutuellement un angle interne (a) dans la plage 90° - 150°
    b) notamment dans la plage 100° - 130°.
  7. Inductance toroïdale selon l'une quelconque des revendications 1 à 6, caractérisée en ce que
    a) les bobinages partiels (20) sont constitués de torons,
    b) notamment en ce que les bobinages partiels sont fabriqués à partir de découpes de tôles tordues respectivement vrillées.
  8. Inductance toroïdale selon l'une quelconque des revendications 1 à 7, caractérisée en ce que
    a) les bobinages partiels (22) présentent des éléments de refroidissement respectivement des installations de refroidissement (32 - 35) intérieurs et/ou extérieurs,
    b) au centre de l'inductance toroïdale (1) est notamment prévu un boulon de serrage (28) avec un canal de refroidissement intérieur (28a).
  9. Inductance toroïdale selon l'une quelconque des revendications 1 à 8, caractérisée en ce que les bobinages partiels (14) présentent plusieurs enroulements superposés.
  10. Inductance toroïdale selon l'une quelconque des revendications 1 à 8, caractérisée en ce que
    a) au moins un bobinage partiel (22) présente un élément de bobinage avec un enroulement,
    b) et une première pièce de liaison respectivement de début (36) avec au moins une première surface de contact ainsi qu'une seconde pièce de liaison respectivement de fin (37) avec au moins une seconde surface de contact (37', 37"), qui sont séparées l'une de l'autre
    c) ces pièces de liaison sont mutuellement réunies de manière croisée,
    d) notamment en ce que la pièce de liaison de début (36) présente un ajustage en forme d'un évidement ou d'un épaulement, qui est complémentaire à un ajustage (37') de la pièce de liaison de fin (37), et que
    e) les pièces de liaison de début et de fin (36, 37) sont raccordées aux bobinages partiels voisins (22) au moyen d'un cordon de soudure.
EP92118169A 1991-11-02 1992-10-23 Inductance toroidale Expired - Lifetime EP0540958B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4136176 1991-11-02
DE4136176A DE4136176A1 (de) 1991-11-02 1991-11-02 Toroiddrossel

Publications (2)

Publication Number Publication Date
EP0540958A1 EP0540958A1 (fr) 1993-05-12
EP0540958B1 true EP0540958B1 (fr) 1996-04-17

Family

ID=6443986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92118169A Expired - Lifetime EP0540958B1 (fr) 1991-11-02 1992-10-23 Inductance toroidale

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EP (1) EP0540958B1 (fr)
JP (1) JPH05283252A (fr)
DE (2) DE4136176A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0669629A1 (fr) * 1994-02-25 1995-08-30 Alcatel N.V. Transformateur toroidal
DE19822468A1 (de) 1998-05-19 1999-11-25 Ashland Suedchemie Kernfest Alkydharzemulsionen und deren Anwendungen
DE202005008757U1 (de) * 2005-06-02 2006-10-12 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Transformator
JP5270576B2 (ja) * 2007-01-11 2013-08-21 プラナーマグ インコーポレイテッド 平面型広帯域トランス
DE202011003256U1 (de) * 2011-02-25 2012-05-30 Sekels Gmbh Hochstromfeste, stromkompensierte Funkentstördrossel
DE102014005118A1 (de) * 2014-04-08 2015-10-08 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Entstördrossel

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071220B (de) * 1959-12-17 Siemens-Schuckertwerke Aktiengesellschaft, Berlin Und Erlangen Starkstrom-Drosselspule mit ringförmigem Eisenkern, insbesondere Schaltdrosselspule für Kontaktumformer
DE937184C (de) * 1937-12-16 1955-12-29 Siemens Ag Schaltdrossel
CH231434A (de) * 1941-11-04 1944-03-15 Licentia Gmbh Anordnung zum Betrieb von Stromrichtern, bei denen eine Stromkreisunterbrechung auf mechanischem Wege erfolgt.
DE970447C (de) * 1951-04-14 1958-09-18 Siemens Ag Drosselspule
DE1115829B (de) * 1959-01-16 1961-10-26 Siemens Ag Starkstrom-Drosselspule
DE1638610C3 (de) * 1967-09-28 1974-02-21 Siemens Ag, 1000 Berlin U. 8000 Muenchen Luftdrossel-Ringspule mit veränderlicher Induktivität
DE2658774C2 (de) * 1976-12-24 1983-07-14 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrische Spule mit einer Wicklung aus einer Anzahl gegeneinander isolierten, miteinander verdrillten Litzendrähten bestehenden schlauchförmigen Leitersträngen
SU904004A1 (ru) * 1979-08-06 1982-02-07 Ордена Ленина И Ордена Трудового Красного Знамени Институт Электросварки Им.Е.О.Патона Кольцевой трансформатор
CA1192281A (fr) * 1982-01-06 1985-08-20 John L. Fisher Transformateur electrique toroidal et methode de fabrication
SU1410118A1 (ru) * 1986-12-30 1988-07-15 Предприятие П/Я А-7866 Электромагнитное устройство

Also Published As

Publication number Publication date
JPH05283252A (ja) 1993-10-29
DE59206030D1 (de) 1996-05-23
EP0540958A1 (fr) 1993-05-12
DE4136176A1 (de) 1993-05-06

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