EP0557549A1 - Transformateur à noyau annulaire - Google Patents

Transformateur à noyau annulaire Download PDF

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Publication number
EP0557549A1
EP0557549A1 EP92103238A EP92103238A EP0557549A1 EP 0557549 A1 EP0557549 A1 EP 0557549A1 EP 92103238 A EP92103238 A EP 92103238A EP 92103238 A EP92103238 A EP 92103238A EP 0557549 A1 EP0557549 A1 EP 0557549A1
Authority
EP
European Patent Office
Prior art keywords
winding
toroidal
core
transformer according
wound
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.)
Granted
Application number
EP92103238A
Other languages
German (de)
English (en)
Other versions
EP0557549B1 (fr
Inventor
Volker Hanser
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.)
HANSER Volker
Original Assignee
J Schneider Elektrotechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by J Schneider Elektrotechnik GmbH filed Critical J Schneider Elektrotechnik GmbH
Priority to ES92103238T priority Critical patent/ES2076580T3/es
Priority to DE59203473T priority patent/DE59203473D1/de
Priority to EP19920103238 priority patent/EP0557549B1/fr
Publication of EP0557549A1 publication Critical patent/EP0557549A1/fr
Application granted granted Critical
Publication of EP0557549B1 publication Critical patent/EP0557549B1/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
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/005—Impregnating or encapsulating
    • 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
    • H01F30/16—Toroidal transformers

Definitions

  • the invention relates to a method for producing a cast power resin cast with a wound cutting tape core, preferably made of a cold-rolled ferro alloy, which has a magnetic preferential direction, and a toroidal transformer produced by this method.
  • Modern ferro alloys for the production of transformer sheets consisting essentially of iron / nickel or iron / silicon alloys, have very good magnetic properties which make it possible to construct transformers with correspondingly good electrical values, but are very difficult to process. Shall the good magnetic Properties of these transformer sheets are exploited, the magnetic preferred direction with the main flow direction in the transformer sheet must match as much as possible. This means that, for example, normal M-cuts cannot be used, but that with a three-column transformer, the preferred magnetic direction in the yokes must be perpendicular to that in the cores. In addition, the core and yoke sheets must be mitred to largely keep the flow direction in the preferred direction of the sheets.
  • Toroidal transformers have been known for a long time, in which the transformer sheet, which is in tape form, is wound in a ring and then this toroid is wound with transformer coils. With such a toroidal transformer, the difficulties described above do not arise, since the direction of flow in the transformer sheet always corresponds to its preferred magnetic direction. Difficulties arise with such toroidal transformers due to the application of the windings special special winding machines. Toroidal transformers and chokes have therefore so far only been built for small outputs. Grid power transformers with this structure have not yet been disclosed.
  • cutting band cores are also used which, like the toroidal core transformers, have a wound core, but usually wound in an approximate rectangular shape, which is cut at two points transversely to the longitudinal direction of the metal sheets. This makes it possible to place previously manufactured spools on the straight parts of these cut ribbon cores wound in a rectangular shape and then to bring the two core halves together again with the smallest possible air gap. This eliminates the difficulty of winding such cores, which also have extremely good electrical properties.
  • only low-power transformers equipped with such cutting tape cores have so far become known.
  • the toroidal transformer according to the invention thus differs from the known toroidal transformers with a ribbon core in that it does not have a rectangular wound core like this, but this winding core is circular.
  • This has the disadvantage, ostensibly, that no cylindrical coils can be pushed onto the winding core, but that, and that probably prevented the experts from using such round winding cores, the winding and sliding on of the coils could be difficult. In fact this is not the case, if so, as by the Invention is set forth, since the low-voltage coil with its relatively thick wire cross-section pre-wound as an air coil and then can be pushed over the half-arch of the cut core without difficulty.
  • the winding disks should not exceed a disk width of 40 degrees of arc of the inner ring core diameter, in particular to enable the individual winding disks to be pushed over the ring core.
  • the disc-shaped design of the high-voltage winding not only avoids the difficulties in moving the winding parts onto the toroid, but also does not result in any insulation problems, since these winding disks each have only a limited voltage range for the entire high-voltage coil have to record.
  • the arrangement of the individual winding disks can also be adapted to the respective requirements, that is to say individual winding disks can be combined to form disk segments or symmetrical distances can also be set.
  • the hardened toroidal core is coated with an elastically flexible insulating material.
  • This insulation material not only represents an electrical insulation layer to the toroid, but also enables a certain amount of heat to move both the toroid and the low-voltage coil pushed onto the toroid.
  • This insulation layer is therefore an important feature of the invention, since it has been shown that with such transformers of greater output, the removal of the heat generated in these compactly constructed transformers can cause difficulties and therefore leads to thermal movements of the individual components. Since the casting resin into which the toroidal core transformer is cast can be considered rigid, such thermal movements, due to the different coefficients of thermal expansion of the different materials, ultimately lead to microcracks within the casting resin, which can lead to a change in the electrical field or to electrical breakdown .
  • the complete encapsulation of the transformer according to the invention has the advantage of extraordinary noise insulation. This becomes one causes that all parts of the transformer - iron core, low-voltage and high-voltage coil - are firmly embedded in the casting resin, on the other hand in that the casting resin forms a sound-absorbing layer around the transformer. However, this complete pouring is only possible through the insulating material layer inserted according to the invention.
  • a silicone is proposed as the preferred insulating material, which can be constructed to be both elastic and flexible with good electrical and thermal properties.
  • winding disks of the high-voltage winding are usually wound in such a way that disks with a constant width result.
  • Such a winding can be produced with the modern automatic winding machines without difficulty.
  • the transformer according to the invention can also be equipped with diodes for rectification.
  • diodes assigned to each winding disk are arranged on or in the outwardly projecting casting ribs.
  • the diodes are expediently accommodated in a vertical air shaft provided on the ribs. This has the advantage that the diodes against mechanical damage is protected, that it is accessible and therefore easily replaceable and that you are also sufficiently cooled by the air flow resulting in this air shaft.
  • there are also advantageous electrical voltage ratios since each diode or diode arrangement is only acted upon by the partial voltage of a single winding disk.
  • the single-phase transformers constructed in this way can be connected in the usual way to three-phase transformers standing side by side.
  • a particularly expedient embodiment results from the fact that the three individual transformers are placed on top of one another to form an “energy column” and anchored in this position. This not only brings spatial advantages, but also good heat dissipation through the rib-shaped parts of the transformers arranged one above the other.
  • the anchoring is carried out in such a way that the individual transformer blocks can also be displaced in the vertical direction in order to compensate for the thermal movements.
  • the toroidal transformer shown has a circularly wound toroid (1), which is divided into two halves by two cuts (2).
  • Low-voltage coils (3) which were previously manufactured as air coils, are pushed onto these two ring halves, as shown in FIG. 9.
  • an elastic, flexible insulation layer (4) Between the low-voltage coil (3) and the toroidal core (1) there is an elastic, flexible insulation layer (4).
  • the two halves of the ring core are each cast separately, although the cut surfaces (2) of the ring cores are still free.
  • support elements (8) are then placed on the low-voltage coil (3) when the toroidal halves finished to the low-voltage coil are not cast.
  • These support elements determine the position of the high-voltage coils (5, 15) to be pushed on.
  • the high-voltage coils (5 and 15) are then pushed over the ring core halves, as can be seen from FIGS. 4 and 5.
  • the two toroid halves are on their cut surfaces pressed together and, for example by surface welding, fixed in this position and then cast with casting resin (6).
  • the protruding winding disks of the high-voltage windings (5) give rise to ribs (7) which provide good ventilation for the toroidal transformer thus constructed.
  • Fig. 10 finally shows an "energy column” formed from three superimposed single toroidal transformers, which are held in this position by a central pressure rod (9) and a resilient clamping ring (8).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP19920103238 1992-02-26 1992-02-26 Transformateur à noyau annulaire Expired - Lifetime EP0557549B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES92103238T ES2076580T3 (es) 1992-02-26 1992-02-26 Transformador toroidal.
DE59203473T DE59203473D1 (de) 1992-02-26 1992-02-26 Ringkerntransformator.
EP19920103238 EP0557549B1 (fr) 1992-02-26 1992-02-26 Transformateur à noyau annulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19920103238 EP0557549B1 (fr) 1992-02-26 1992-02-26 Transformateur à noyau annulaire

Publications (2)

Publication Number Publication Date
EP0557549A1 true EP0557549A1 (fr) 1993-09-01
EP0557549B1 EP0557549B1 (fr) 1995-08-30

Family

ID=8209365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920103238 Expired - Lifetime EP0557549B1 (fr) 1992-02-26 1992-02-26 Transformateur à noyau annulaire

Country Status (3)

Country Link
EP (1) EP0557549B1 (fr)
DE (1) DE59203473D1 (fr)
ES (1) ES2076580T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995011514A1 (fr) * 1993-10-20 1995-04-27 Ciba Geigy Ag Transformateur de puissance
WO2001020622A1 (fr) * 1999-09-16 2001-03-22 Philippe Viarouge Transformateurs de puissance et inductances de puissance pour des applications a basse frequence faisant intervenir des materiaux magnetiques composites isotropes presentant une puissance massique elevee
WO2006040074A1 (fr) * 2004-10-07 2006-04-20 Volker Werner Hanser Transformateur a noyau toroidal
WO2009138096A1 (fr) * 2008-05-13 2009-11-19 Abb Technology Ag Transformateur sec
WO2009138095A1 (fr) * 2008-05-13 2009-11-19 Abb Technology Ag Transformateur sec
EP2184749A1 (fr) 2008-11-08 2010-05-12 ABB Technology AG Agencement de segments d'enroulement
WO2009146835A3 (fr) * 2008-06-07 2010-08-05 Volker Werner Hanser Transformateur
WO2011014344A1 (fr) * 2009-07-31 2011-02-03 Abb Technology Ag Transformateur monté sur un poteau de type sec
US12278035B2 (en) 2019-01-25 2025-04-15 Hun-Ren Energiatudományi Kutatóközpont Method for insulation of coil of toroid transformers

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009138100A1 (fr) * 2008-05-13 2009-11-19 Abb Technology Ag Enroulement haute tension
WO2009138099A1 (fr) * 2008-05-13 2009-11-19 Abb Technology Ag Connexion de modules d'enroulements de transformateur
CA2723256A1 (fr) 2008-05-13 2009-11-19 Abb Technology Ag Noyau toroidal modulaire
DE102009017399A1 (de) 2008-06-07 2010-06-24 Volker Werner Hanser Transformator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1281532A (fr) * 1961-01-06 1962-01-12 Bobine d'arrêt pour appareils d'éclairage
DE3613861A1 (de) * 1986-04-24 1987-11-05 Nkl Naturenergie Und Kleinspan Geraeuschgedaempftes induktives elektrisches bauelement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1281532A (fr) * 1961-01-06 1962-01-12 Bobine d'arrêt pour appareils d'éclairage
DE3613861A1 (de) * 1986-04-24 1987-11-05 Nkl Naturenergie Und Kleinspan Geraeuschgedaempftes induktives elektrisches bauelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 15 (E-291)(1738) 22. Januar 1985 & JP-A-59 161 806 ( OOSAKA HENATSUKI ) 12. September 1984 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995011514A1 (fr) * 1993-10-20 1995-04-27 Ciba Geigy Ag Transformateur de puissance
WO2001020622A1 (fr) * 1999-09-16 2001-03-22 Philippe Viarouge Transformateurs de puissance et inductances de puissance pour des applications a basse frequence faisant intervenir des materiaux magnetiques composites isotropes presentant une puissance massique elevee
US6879237B1 (en) 1999-09-16 2005-04-12 Electrotechnologies Selem Inc. Power transformers and power inductors for low-frequency applications using isotropic material with high power-to-weight ratio
EA012993B1 (ru) * 2004-10-07 2010-02-26 Фолькер Вернер Ханзер Способ и устройство для изготовления трансформатора с тороидальными сердечниками
AP2125A (en) * 2004-10-07 2010-05-17 Volker Werner Hanser Toroidal core transformer
EA012485B1 (ru) * 2004-10-07 2009-10-30 Фолькер Вернер Ханзер Трансформатор с тороидальными сердечниками
WO2006040074A1 (fr) * 2004-10-07 2006-04-20 Volker Werner Hanser Transformateur a noyau toroidal
EA012992B1 (ru) * 2004-10-07 2010-02-26 Фолькер Вернер Ханзер Способ и устройство для изготовления тороидального сердечника для трансформатора с тороидальными сердечниками
AU2005293857B2 (en) * 2004-10-07 2009-10-01 Volker Werner Hanser Toroidal core transformer
WO2009138096A1 (fr) * 2008-05-13 2009-11-19 Abb Technology Ag Transformateur sec
WO2009138095A1 (fr) * 2008-05-13 2009-11-19 Abb Technology Ag Transformateur sec
US8310330B2 (en) 2008-05-13 2012-11-13 Abb Technology Ag Dry-type transformer
WO2009146835A3 (fr) * 2008-06-07 2010-08-05 Volker Werner Hanser Transformateur
WO2010051911A1 (fr) * 2008-11-08 2010-05-14 Abb Technology Ag Agencement de segments bobinés
EP2184749A1 (fr) 2008-11-08 2010-05-12 ABB Technology AG Agencement de segments d'enroulement
WO2011014344A1 (fr) * 2009-07-31 2011-02-03 Abb Technology Ag Transformateur monté sur un poteau de type sec
US12278035B2 (en) 2019-01-25 2025-04-15 Hun-Ren Energiatudományi Kutatóközpont Method for insulation of coil of toroid transformers

Also Published As

Publication number Publication date
DE59203473D1 (de) 1995-10-05
ES2076580T3 (es) 1995-11-01
EP0557549B1 (fr) 1995-08-30

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