EP0253298B1 - High-capacity transformer - Google Patents
High-capacity transformer Download PDFInfo
- Publication number
- EP0253298B1 EP0253298B1 EP87109879A EP87109879A EP0253298B1 EP 0253298 B1 EP0253298 B1 EP 0253298B1 EP 87109879 A EP87109879 A EP 87109879A EP 87109879 A EP87109879 A EP 87109879A EP 0253298 B1 EP0253298 B1 EP 0253298B1
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- European Patent Office
- Prior art keywords
- another
- secondary winding
- conductors
- stranded
- capacity transformer
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- Expired - Lifetime
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- 238000004804 winding Methods 0.000 claims abstract description 47
- 239000004020 conductor Substances 0.000 claims abstract description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
- H01B7/303—Conductors comprising interwire insulation
Definitions
- the invention relates to a high-performance transformer according to the preamble of patent claim 1.
- Winding conductors for such transformers are known from European patent application EP-A 0133220 and French patent FR-PS 1198126.
- the object of the invention is therefore to improve the efficiency with regard to frequency and current behavior in a high-power transformer of the type mentioned.
- This measure also reduces the eddy current losses in the transformer to a minimum, since the differences in current densities within a single conductor are relatively small.
- each individual conductor occupies every layer in the overall cross-section of the strand just as often and for as long as any other individual conductor.
- the parallel strands of the secondary winding enable exact current balancing, which is necessary for a distribution of the current, e.g. on a number of diodes connected in parallel is a requirement.
- FIG. 1 schematically shows a high-performance transformer U, the secondary winding SW of which consists of one turn with six strands ST1 to ST6 connected in parallel. At one end of the secondary winding SW, all strands ST1 to ST6 are connected to a collection point SA. At the other end of the secondary winding SW, each phase is connected to a rectifier diode GD1 to GD6. The six freewheeling diodes FD1 to FD6 connected in parallel connect the collection point SA to the outputs of the rectifier diodes GD1 to GD6.
- the high-frequency currents in the secondary circuit between the freewheeling diodes FD1 to FD6 and the rectifier diodes GD1 to GD6 cause, due to the design of the secondary winding SW according to the invention, only extremely low losses, which result in a low temperature (for example below 80 ° C.) of the high-power transformer U and one bring high efficiency (eg over 96% at 600 amps).
- the primary winding PW and the secondary winding SW consisting of a single turn lie between the base and cover parts BD consisting of ferrite material, each with E-shaped profiles.
- the internal primary winding PW is composed of a number of turns wound around the central web M of the respective E-shaped base and cover parts BD with the strand according to the invention.
- the single turn of the secondary winding SW hugs the structure of the primary winding PW in a U-shape. This ensures the best possible coupling even with a very high gear ratio.
- the secondary winding SW consists of six strands ST1 to ST6 lying parallel to one another in one plane, which in turn are each formed from four strands L1 to L4 lying parallel to one another.
- the strands L1 to L4 in turn are designed as a woven copper tape B with a rectangular cross section and contain a large number of electrically insulated individual conductors E which are twisted or intertwined with one another.
- the cross section of the individual strands ST1 to ST6 is thus also rectangular, which results in a band-shaped secondary winding SW.
- the six strands ST1 to ST6 are arranged in steps with increasing length in order to keep the connecting lines to rectifier diodes D1 to D6 in a row as short as possible.
- a flange F for connection to the collection point SA provided that electrically and mechanically connects the six strands ST1 to ST6 and thus also all individual conductors E of all strands L to one another.
- the individual conductors E of the respective strings ST1 to ST6 are electrically and mechanically connected to one another with the aid of a cable lug KS1 to KS6.
- shrink tubes (not shown here) can be used, which are each pulled over one strand.
- the configuration of the primary winding as a strand with individual conductors E insulated from one another makes it possible to use a single conductor of the strand as the demagnetization winding of the high-power transformer. This has the advantage of a good coupling and circuit simplifications. However, it would be advisable to provide a single conductor of the strand with a surface color that makes it distinguishable from the other individual conductors.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Waveguide Aerials (AREA)
- Fats And Perfumes (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Die Erfindung betrifft einen Hochleistungsübertrager nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a high-performance transformer according to the preamble of patent claim 1.
Wicklungsleiter für derartige Übertrager sind aus der europäischen Patentanmeldung EP-A 0133220 und der französischen Patentschrift FR-PS 1198126 bekannt.Winding conductors for such transformers are known from European patent application EP-A 0133220 and French patent FR-PS 1198126.
Entwurf und Realisierungen von gängigen Transformatoren oder Übertragern bereiten einem Fachmann an sich weder in der Theorie noch in der Praxis Schwierigkeiten. In einigen Anwendungsfällen allerdings, wie beim Einsatz in getaketen Stromversorgungen mit hoher Ausgangsleistung und hoher Taktfrequenz werden an einen Übertrager eine Anzahl von extremen Forderungen gestellt, die dessen Realisierung bedeutend erschweren.The design and implementation of common transformers or transformers pose no difficulties for a person skilled in the art, either in theory or in practice. In some applications, however, such as when used in clocked power supplies with high output power and high clock frequency, a number of extreme demands are placed on a transformer, which make its implementation significantly more difficult.
Der Forderung des hohen Ausgangsstromes begegnete man zunächst mit einer Sekundärwicklung aus dicken Kupferbändern. Neben den Schwierigkeiten der Herstellung waren diese Übertrager aber zu groß und zu schwer. Als man dann, um Eisen im Übertragerkern sparen zu wollen, die Frequenz erhöhte, machte sich der Skin-Effekt bemerkbar, durch den die Ladungsträger in die Randzone eines Leiters gedrängt werden. Trotz massiver Kupferbänder mußte man nunmehr eine Erhöhung des Innenwiderstands der Wicklungen und damit einen erhöhten Übertragungsverlust hinnehmen. Zur Beseitigung dieses Nachteils ist es aus der DE-PS 32 05 650 bekannt, das dicke und massive Kupferband einer Sekundärwicklung durch eine Anzahl von dünneren und voneinander isolierten Bändern zu ersetzen, die an zur Stromverteilung parallel geschaltete Dioden angeschlossen sind.The requirement of the high output current was initially met with a secondary winding made of thick copper strips. In addition to the difficulties of manufacturing, these transformers were too big and too heavy. When the frequency was increased in order to save iron in the transformer core, the skin effect became noticeable by which the charge carriers are pushed into the edge zone of a conductor. Despite massive copper strips, one had to accept an increase in the internal resistance of the windings and thus an increased transmission loss. To eliminate this disadvantage, it is known from DE-PS 32 05 650 to replace the thick and solid copper strip of a secondary winding by a number of thinner and mutually insulated strips which are connected to diodes connected in parallel for current distribution.
Mit zunehmender Stromstärke und Frequenz wird der Wirkungsgrad eines nach diesem Prinzip aufgebauten Übertragers geringer.With increasing current strength and frequency, the efficiency of a transformer constructed according to this principle becomes lower.
Aufgabe der Erfindung ist es deshalb, den Wirkungsgrad bezüglich Frequenz- und Stromverhalten bei einem Hochleistungsübertrager der eingange genannten Art zu verbessern.The object of the invention is therefore to improve the efficiency with regard to frequency and current behavior in a high-power transformer of the type mentioned.
Gelöst wird die Aufgabe erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale.The object is achieved according to the invention by the features specified in the characterizing part of patent claim 1.
Bei einem derartigen Hochleistungsübertrager wird eine Widerstandserhöhung durch den Skin-Effekt vermieden, indem der Querschnitt der Einzelleiter nur so groß ist, daß bei gegebener Frequenz im Inneren jedes einzelnen drahtförmigen Einzelleiters möglichst kein von Ladungsträgern freier Raum entsteht.In such a high-power transformer, an increase in resistance due to the skin effect is avoided by the cross section of the individual conductors being only so large that, for a given frequency, no space free of charge carriers is created inside each individual wire-shaped individual conductor.
Für eine derartige Ausgestaltung muß man für die relevanten Frequenzen in Erwägung ziehen, daß ein Hochleistungsübertrager z.B. in getakteten Stromversorgungen meistens mit rechteckförmigen Primärsignalen angesteuert wird und zur annähernd korrekten Übertragung des Rechtecksignals auch Oberwellenströme bis mindestens zu einem Faktor 10 oberhalb der Taktfrequenz nötig sind.For such a design one has to consider for the relevant frequencies that a high power transformer e.g. in clocked power supplies is mostly controlled with rectangular primary signals and for the approximately correct transmission of the square wave signals also harmonic currents up to at least a factor 10 above the clock frequency are necessary.
Auch die Wirbelstromverluste im Übertrager werden durch diese Maßnahme auf ein Minimum reduziert, da die Unterschiede der Stromdichten innerhalb eines Einzelleiters relativ gering sind.This measure also reduces the eddy current losses in the transformer to a minimum, since the differences in current densities within a single conductor are relatively small.
Der Verluste erzeugende Effekt der Spulenstromverdrängung, durch den die Stromdichten der Einzelleiter untereinander zur Achse der Wicklung hin erhöht sind, wird durch Verdrillen oder Verflechten der Einzelleiter in der Litze ausgeglichen. Damit nimmt nach dem Prinzip des Roebelstabes jeder Einzelleiter ebenso oft und ebenso lange jede Lage im Gesamtquerschnitt der Litze ein wie jeder andere Einzelleiter.The loss-producing effect of the coil current displacement, by means of which the current densities of the individual conductors with respect to one another towards the axis of the winding, is compensated for by twisting or intertwining the individual conductors in the strand. Thus, according to the Roebel rod principle, each individual conductor occupies every layer in the overall cross-section of the strand just as often and for as long as any other individual conductor.
Die parallel geführten Stränge der Sekundärwicklung ermöglichen eine exakte Stromsymmetrierung, die für eine Verteilung des Stromes, z.B. auf eine Anzahl parallelgeschalteter Dioden Voraussetzung ist.The parallel strands of the secondary winding enable exact current balancing, which is necessary for a distribution of the current, e.g. on a number of diodes connected in parallel is a requirement.
Aus der US-A-4431860 ist en an sich bekannt, in Hochleistungsubertragern verwendete Kabel aus mehreren zueinander parallel liegenden Litzen zusammenzusetzen.From US-A-4431860 it is known per se to assemble cables used in high-performance transmitters from a plurality of strands lying parallel to one another.
Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous developments of the invention result from the subclaims.
Mit derartigen Ausführungsformen der Litzen und der Stränge wird ein hoher Füllfaktor in der Sekundär- und in der Primärwicklung und damit eine optimale Raumausnützung erreicht.With such embodiments of the strands and the strands, a high fill factor in the secondary and in the primary winding and thus an optimal use of space is achieved.
Ein Ausführungsbeispiel wird im folgenden anhand der Zeichnung näher erläutert. Dabei zeigen die
- FIG 1 einen Stromlaufplan für den Sekundärstromkreis eines erfindungsgemäßen Hochleistungsübertragers mit parallel geschalteten Gleichrichterdioden und Freilaufdioden,
- FIG 2 einen Schnitt durch einen Hochleistungsübertrager mit einer Primärwicklung und mit einer aus einer Windung bestehenden Sekundärwicklung,
- FIG 3, 3A und 3B eine Ausgestaltung der Sekundärwicklung nach FIG 2.
- 1 shows a circuit diagram for the secondary circuit of a high-power transformer according to the invention with rectifier diodes and freewheeling diodes connected in parallel,
- 2 shows a section through a high-performance transformer with a primary winding and with a secondary winding consisting of one turn,
- 3, 3A and 3B show an embodiment of the secondary winding according to FIG. 2.
In FIG 1 ist schematisch ein Hochleistungsübertrager Ü dargestellt, dessen Sekundärwicklung SW aus einer Windung mit sechs parallelgeschalteten Strängen ST1 bis ST6 besteht. An einem Ende der Sekundärwicklung SW sind alle Stränge ST1 bis ST6 an einen Sammelpunkt SA angeschlossen. Am anderen Ende der Sekundärwicklung SW ist jeder Strang mit jeweils einer Gleichrichterdiode GD1 bis GD6 verbunden. Die dargestellten, parallelgeschalteten sechs Freilaufdioden FD1 bis FD6 verbinden den Sammelpunkt SA mit den Ausgängen der Gleichrichterdioden GD1 bis GD6.FIG. 1 schematically shows a high-performance transformer U, the secondary winding SW of which consists of one turn with six strands ST1 to ST6 connected in parallel. At one end of the secondary winding SW, all strands ST1 to ST6 are connected to a collection point SA. At the other end of the secondary winding SW, each phase is connected to a rectifier diode GD1 to GD6. The six freewheeling diodes FD1 to FD6 connected in parallel connect the collection point SA to the outputs of the rectifier diodes GD1 to GD6.
Mit der gezeigten Art der stromaufteilung auf die Gleichrichterdioden GD1 bis GD6 werden nich nur mechanische Probleme der Geometrie der Anschlüsse gelöst, sondern es wird auch eine exakte Stromsymmetrierung und eine weitestgehende thermische und elektrische Unabhängigkeit der Gleichrichterdioden GD1 bis GD6 untereinander erzielt. Die elektrischen und thermischen Bedingungen sind in jedem Strang ST1 bis ST6 die gleichen.With the type of current distribution shown on the rectifier diodes GD1 to GD6, not only mechanical problems of the geometry of the connections are solved, but also an exact current balancing and a largely thermal and electrical independence of the rectifier diodes GD1 to GD6 among themselves is achieved. The electrical and thermal conditions are the same in each line ST1 to ST6.
Die in dem Sekundärstromkreis zwischen den Freilaufdioden FD1 bis FD6 und den Gleichrichterdioden GD1 bis GD6 befindlichen hochfrequenten Ströme verursachen, bedingt durch die erfingungsgemäße Ausgestaltung der Sekundärwicklung SW nur äußerst geringe Verluste, die eine nieddrige Temperatur (z.B. unter 80°C) des Hochleistungsübertragers Ü und einen hohen Wirkungsgrad (z.B. über 96% bei 600 Ampere) mit sich bringen.The high-frequency currents in the secondary circuit between the freewheeling diodes FD1 to FD6 and the rectifier diodes GD1 to GD6 cause, due to the design of the secondary winding SW according to the invention, only extremely low losses, which result in a low temperature (for example below 80 ° C.) of the high-power transformer U and one bring high efficiency (eg over 96% at 600 amps).
Aus FIG 2 ist der Aufbau eines beispielhaften Hochleistungsübertragers Ü ersichtlich. Zwischen dem aus Ferritmaterial bestehenden boden und Deckelteilen BD mit jeweils E-förmigen Profilen liegen die Primärwicklung PW und die aus einer einzigen Windung bestehende Sekundärwicklung SW. Die innenliegende Primärwicklung PW setzt sich aus einer Anzahl um den Mittelsteg M der jeweils E-förmigen Boden- und Deckelteile BD gewickelten Windungen mit der erfindungsgemäßen Litze zusammen. Die einzige Windung der Sekundärwicklung SW schmiegt sich U-förmig an den Aufbau der Primärwicklung PW an. Dadurch ist eine möglichst gute Kopplung auch bei sehr großem Übersetzungsverhältnis gegeben.2 shows the structure of an exemplary high-performance transformer Ü. The primary winding PW and the secondary winding SW consisting of a single turn lie between the base and cover parts BD consisting of ferrite material, each with E-shaped profiles. The internal primary winding PW is composed of a number of turns wound around the central web M of the respective E-shaped base and cover parts BD with the strand according to the invention. The single turn of the secondary winding SW hugs the structure of the primary winding PW in a U-shape. This ensures the best possible coupling even with a very high gear ratio.
Aus FIG 3, 3A und 3B ist die Struktur einer erfindungsgemäßen Sekundärwicklung SW ersichtlich. Die Sekundärwicklung SW besteht aus sechs parallel in einer Ebene nebeneinander liegenden Strängen ST1 bis ST6, die ihrerseits jeweils aus vier parallel nebeneinander liegenden Litzen L1 bis L4 gebildet sind. Die Litzen L1 bis L4 wiederum sind als Kupfergewebeband B mit rechteckförmigem Querschnitt ausgeführt und beinhalten eine hohe Anzahl voneinander elektrisch isolierter Einzelleiter E, die untereinander verdrillt oder verflochten sind. Der Querschnitt der einzelnen Stränge ST1 bis ST6 ist somit ebenfalls rechteckförmig, wodurch sich eine bandförmige Sekundärwicklung SW ergibt.3, 3A and 3B show the structure of a secondary winding SW according to the invention. The secondary winding SW consists of six strands ST1 to ST6 lying parallel to one another in one plane, which in turn are each formed from four strands L1 to L4 lying parallel to one another. The strands L1 to L4 in turn are designed as a woven copper tape B with a rectangular cross section and contain a large number of electrically insulated individual conductors E which are twisted or intertwined with one another. The cross section of the individual strands ST1 to ST6 is thus also rectangular, which results in a band-shaped secondary winding SW.
An einem Ende der Sekundärwicklung SW sind die sechs Stränge ST1 bis ST6 stufenförmig mit zunehmender Länge angeordnet, um die Verbindungsleitungen zu in einer Reihe liegenden Gleichrichterdioden D1 bis D6 möglichst kurz zu halten. Für das andere Ende der Sekundärwicklung ist zum Anschluß an den Sammelpunkt SA eine Flansch F vorgesehen, der die sechs Stränge ST1 bis ST6 und damit auch alle Einzelleiter E aller Litzen L untereinander elektrisch und mechanisch verbindet.At one end of the secondary winding SW, the six strands ST1 to ST6 are arranged in steps with increasing length in order to keep the connecting lines to rectifier diodes D1 to D6 in a row as short as possible. For the other end of the secondary winding is a flange F for connection to the collection point SA provided that electrically and mechanically connects the six strands ST1 to ST6 and thus also all individual conductors E of all strands L to one another.
Für den Anschluß an die Gleichrichterdioden GD1 bis GD6 sind die Einzelleiter E der jeweiligen Stränge ST1 bis ST6 mit Hilfe eines Kabelschuhes KS1 bis KS6 miteinander elektrisch und mechanisch verbunden. Zur Bündelung der Litzen L1 bis L4 eines Stranges ST können - hier nicht dargestellte-Schrumpfschläuche dienen, die jeweils über einen Strang gezogen werden.For connection to the rectifier diodes GD1 to GD6, the individual conductors E of the respective strings ST1 to ST6 are electrically and mechanically connected to one another with the aid of a cable lug KS1 to KS6. To bundle the strands L1 to L4 of a strand ST, shrink tubes (not shown here) can be used, which are each pulled over one strand.
Für eine kostengünstige Fertigung des Hochleistungsübertragers Ü empfiehlt es sich, für die Primärwicklung PW und die Sekundärwicklung SW eine Litze L mit gleichen Abmessungen zu verwenden, obwohl es auch nötig sein kann, daß durch die unterschiedlichen Längen der Stränge ST1 bis ST6 ein dadurch entstehender Widerstandsunterschied kompensiert werden muß. Dazu sind dann Litzen L mit einer unterschiedlichen Anzahl von Einzelleitern E zu verwenden.For a cost-effective production of the high-power transformer Ü, it is recommended to use a stranded wire L with the same dimensions for the primary winding PW and the secondary winding SW, although it may also be necessary to compensate for the resulting difference in resistance due to the different lengths of the strands ST1 to ST6 must become. For this purpose, strands L with a different number of individual conductors E are to be used.
Die Ausgestaltung der Primärwicklung als Litze mit voneinander isolierten Einzelleitern E macht es möglich, als Abmagnetisierungswicklung des Hochleistungsübertragers einen Einzelleiter der Litze zu verwenden. Dies hat den Vorteil einer guten Kopplung und schaltungstechnischer Vereinfachungen. Dafür wäre es allerdings ratsam, einen Einzelleiter der Litze mit einer Oberflächenfarbe zu versehen, die ihn von den anderen Einzelleitern unterscheidbar macht.The configuration of the primary winding as a strand with individual conductors E insulated from one another makes it possible to use a single conductor of the strand as the demagnetization winding of the high-power transformer. This has the advantage of a good coupling and circuit simplifications. However, it would be advisable to provide a single conductor of the strand with a surface color that makes it distinguishable from the other individual conductors.
- Ü Ü
- HochleistungsübertragerHigh performance transformer
- PWPW
- Primärwicklung Primary winding
- SW SW
- SekundärwicklungSecondary winding
- GD1-GD6 GD1-GD6
- GleichrichterdiodenRectifier diodes
- ST1-ST6 ST1-ST6
- SträngeStrands
- SA SAT
- SammelpunktAssembly point
- FD1-FD6 FD1-FD6
- FreilaufdiodenFree wheeling diodes
- BDBD
- Boden-Deckelteil Bottom cover part
- M M
- MittelstegMittelsteg
- F F
- Flanschflange
- L1-L4 L1-L4
- LitzenStrands
- E E
- EinzelleiterSingle conductor
- BB
- Band tape
- KS1-KS6KS1-KS6
- Kabelschuhe Cable lugs
Claims (6)
- High-capacity transformer (Ü) for clocked power supplies having at least one primary winding (PW) and at least one secondary winding (SW), the respective turns of which are formed as a stranded conductor (L) which itself consists of wire-shaped individual conductors (E) provided in each case with an electrically insulating surface and twisted or woven together, said individual conductors being in each case connected electrically to one another at both ends of the stranded conductor (L), characterised in that the secondary winding (SW) consists of a plurality of phase windings (ST) connected in parallel to one another which themselves are formed from a plurality of stranded conductors (L) connected in parallel to one another, in that the stranded conductors (L) of a respective phase winding (ST) are connected electrically and mechanically to one another at both ends, in that the phase windings (ST) are connected electrically and mechanically to one another at one end of the secondary winding (SW), and in that the other end of the secondary winding (SW) the phase windings (ST) are connected electrically to one another via in each case one rectifier element (GD).
- High-capacity transformer according to Claim 1, characterised in that the stranded conductors (L) and the phase windings (ST) have a rectangular cross-section in each case, and in that the secondary winding (SW) is constructed as a U-shaped wound band (B) having phase windings (ST) lying one above the other in parallel planes.
- High-capacity transformer according to one of the preceding claims, characterised in that the turns of the primary winding (PW) and of the secondary winding (SW) consist of stranded conductors (L) of preferably identical dimensions.
- High-capacity transformer according to one of the preceding claims, characterised in that when the stranded conductors (ST) have different lengths, the stranded conductors (L) contain a different number of individual conductors (E) for the compensation of the resulting differences in resistance.
- High-capacity transformer according to one of the preceding claims, characterised in that at least one individual conductor of the stranded conductor (L) serving as primary winding (PW) is provided with a surface colour which differs from that of the other individual conductors.
- High-capacity transformer according to one of the preceding claims, characterised in that the stranded conductor (L) is constructed as a copper braid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87109879T ATE62561T1 (en) | 1986-07-10 | 1987-07-08 | HIGH-PERFORMANCE TRANSFORMER. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3623290 | 1986-07-10 | ||
| DE3623290 | 1986-07-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0253298A1 EP0253298A1 (en) | 1988-01-20 |
| EP0253298B1 true EP0253298B1 (en) | 1991-04-10 |
Family
ID=6304875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87109879A Expired - Lifetime EP0253298B1 (en) | 1986-07-10 | 1987-07-08 | High-capacity transformer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4829417A (en) |
| EP (1) | EP0253298B1 (en) |
| AT (1) | ATE62561T1 (en) |
| DE (1) | DE3769223D1 (en) |
| ES (1) | ES2021306B3 (en) |
| GR (1) | GR3001865T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL139714A0 (en) * | 2000-11-15 | 2002-02-10 | Payton Planar Magnetics Ltd | A bobbin for hybrid coils in planar magnetic components |
| US7976333B2 (en) * | 2009-09-29 | 2011-07-12 | Flex-Cable | Laminar electrical connector |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US587764A (en) * | 1897-08-10 | Wire for armature-windings | ||
| US851467A (en) * | 1907-01-02 | 1907-04-23 | Frank W Wood | Means for preventing sparking. |
| US1213689A (en) * | 1914-04-24 | 1917-01-23 | George K Woodworth | Inductance-coil. |
| US2187213A (en) * | 1937-06-01 | 1940-01-16 | Milliken Humphreys | Electric power cable |
| FR1198126A (en) * | 1958-06-02 | 1959-12-04 | Acec | Winding conductor for battleship-nested transformers |
| NL296248A (en) * | 1962-08-09 | |||
| GB1156133A (en) * | 1966-04-22 | 1969-06-25 | Parsons C A & Co Ltd | Improvements in and relating to Insulated Electrical Conductors |
| DE6909855U (en) * | 1969-03-12 | 1969-07-03 | Felten & Guilleaume Kabelwerk | ELECTRIC RETURNING CONDUCTOR, IN PARTICULAR FOR ELECTRIC CURRENT OR HIGH VOLTAGE CABLES |
| US3747205A (en) * | 1971-10-08 | 1973-07-24 | Westinghouse Electric Corp | Method of constructing a continuously transposed transformer coil |
| CA1208324A (en) * | 1981-08-13 | 1986-07-22 | Daniel D.A. Perco | Multistranded component conductor continuously transposed cable |
| DE3205650C2 (en) * | 1982-02-17 | 1986-04-24 | Siemens AG, 1000 Berlin und 8000 München | Power rectifier arrangement |
| US4538024A (en) * | 1983-07-01 | 1985-08-27 | Amp Incorporated | Flat multiconductor cable extruded on a wheel |
| EP0133220A3 (en) * | 1983-07-22 | 1986-02-12 | Kabel- und Lackdrahtfabriken GmbH | Electric conductor |
| FR2565399B1 (en) * | 1984-05-29 | 1987-09-11 | Bull Sems | TRANSFORMER WITH HIGH PRIMARY-SECONDARY COUPLING |
-
1987
- 1987-07-08 DE DE8787109879T patent/DE3769223D1/en not_active Expired - Fee Related
- 1987-07-08 AT AT87109879T patent/ATE62561T1/en not_active IP Right Cessation
- 1987-07-08 EP EP87109879A patent/EP0253298B1/en not_active Expired - Lifetime
- 1987-07-08 ES ES87109879T patent/ES2021306B3/en not_active Expired - Lifetime
- 1987-07-09 US US07/071,411 patent/US4829417A/en not_active Expired - Fee Related
-
1991
- 1991-04-26 GR GR90401174T patent/GR3001865T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ATE62561T1 (en) | 1991-04-15 |
| ES2021306B3 (en) | 1991-11-01 |
| EP0253298A1 (en) | 1988-01-20 |
| DE3769223D1 (en) | 1991-05-16 |
| US4829417A (en) | 1989-05-09 |
| GR3001865T3 (en) | 1992-11-23 |
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