EP0557549B1 - Transformateur à noyau annulaire - Google Patents

Transformateur à noyau annulaire Download PDF

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Publication number
EP0557549B1
EP0557549B1 EP19920103238 EP92103238A EP0557549B1 EP 0557549 B1 EP0557549 B1 EP 0557549B1 EP 19920103238 EP19920103238 EP 19920103238 EP 92103238 A EP92103238 A EP 92103238A EP 0557549 B1 EP0557549 B1 EP 0557549B1
Authority
EP
European Patent Office
Prior art keywords
winding
toroidal core
process according
casting
core
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
EP19920103238
Other languages
German (de)
English (en)
Other versions
EP0557549A1 (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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE59203473T priority Critical patent/DE59203473D1/de
Priority to EP19920103238 priority patent/EP0557549B1/fr
Priority to ES92103238T priority patent/ES2076580T3/es
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 core 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 preferential 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 strip 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. With such toroidal transformers, however, the application of the windings presents difficulties 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.
  • a toroidal transformer in which transformer turns along the circumference of a toroid in are wound a predetermined distance.
  • the transformer winding consists of a primary winding, which is wound in a frame attached to the winding core, and a secondary winding, which is arranged concentrically on the outside of the primary winding.
  • the windings are connected in series.
  • the frame consists of two half frame parts. A coil area is designed as a circular arc, the outside of which is longer than the inside.
  • the primary winding is wound in such a way that the winding width on the outer circumference is larger than the winding width on the inside.
  • the secondary winding with an insulation cylinder and an insulator in between is attached such that the winding width on the outer circumference is larger than the winding width on the inside.
  • 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.
  • transformers equipped with cutting cores of this type for low power have only become known so far.
  • the object of the invention is to utilize the good properties of such toroidal transformers with ribbon cores also for transformers and chokes of relatively high power, so that they can also be used to build mains power transformers with such cores. This is achieved in a manner according to the invention with a method according to claim 1.
  • the toroidal transformer according to the invention thus differs from the known transformers with a rectangularly wound cutting band core in that this winding core is circular.
  • the winding disks should preferably not exceed a disk width of 40 degrees of arc of the inner toroidal core diameter, in particular to enable the individual winding disks to be pushed over the toroidal 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 insulating layer is therefore an important feature of the invention, since it has been shown that with such transformers of greater power, the removal of the heat generated in these compactly constructed transformers can cause difficulties and therefore leads to thermal movements of the individual components.
  • 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 insulation material, which can be constructed to be both elastic and resilient 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 without difficulty using modern automatic winding machines.
  • 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 still remain free.
  • support elements (8) are then placed on the low-voltage coil (3) when the ring core halves finished to the low-voltage coil are not cast.
  • 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).

Claims (7)

  1. Procédé de fabrication d'un transformateur de puissance de réseau à surmoulage de résine, avec un noyau toroïdal fendu qui est constitué de préférence d'un ferro-alliage laminé à froid et présentant une direction magnétique préférentielle, est enroulé en spirale dans la direction magnétique préférentielle et est consolidé par addition de résine, et avec un enroulement haute tension constitué de plusieurs galettes d'enroulement haute tension, caractérisé par les étapes suivantes :
    1. enduction du noyau toroïdal (1) d'une couche de matériau isolant (4) élastiquement flexible, électriquement isolante mais thermiquement conductrice et résistante à la chaleur ;
    2. découpage du noyau toroïdal (1) en deux moitiés de tore ;
    3.
    a) enfilage sur chaque moitié de tore d'un enroulement rectangulaire basse tension (2) constitué de fil métallique vernissé rond, rectangulaire ou profilé, les bobines sans fer rectangulaires étant enroulées rectilinéairement et pouvant s'adapter, pendant l'enfilage sur la moitié de tore, à la courbure du noyau toroïdal ;
    b) éventuellement, enfilage d'un ou plusieurs enroulements rectangulaires (3) supplémentaires sur l'enroulement respectif préalablement installé ;
    4. surmoulage des moitiés de noyau toroïdal pourvues des enroulements, ou mise en place d'éléments de soutien (10) réalisés en résine moulée ;
    5. enfilage de galettes d'enroulement haute tension préfabriquées respectives (5, 15) ;
    6. réunion des deux moitiés de noyau toroïdal ;
    7. raccordement ou sortie des extrémités des enroulements ;
    8. surmoulage de l'ensemble du transformateur, les galettes d'enroulement (5) étant enrobées de résine sous la forme d'ailettes.
  2. Procédé selon la revendication 1, caractérisé en ce que le matériau isolant est de la silicone.
  3. Procédé selon la revendication 2, caractérisé en ce que le coefficient de dilatation de la silicone est réglé à la valeur du coefficient de dilatation thermique du ferro-alliage ou du matériau des enroulements.
  4. Procédé selon la revendication 1, caractérisé en ce que la largeur des galettes d'enroulement est inférieure ou égale à 40 degrés d'arc du diamètre intérieur du noyau toroïdal.
  5. Procédé selon la revendication 1 ou 4, caractérisé en ce que les deux faces latérales de chaque galette d'enroulement (5) s'étendent sous un angle aigu l'une par rapport à l'autre.
  6. Procédé selon la revendication 1, caractérisé en ce que des canaux d'aération destinés à recevoir des diodes sont disposés sur les ailettes surmoulées (7), saillantes vers l'extérieur, de chaque galette d'enroulement (5, 15).
  7. Procédé selon la revendication 1, caractérisé en ce que trois transformateurs individuels sont superposés en flexibilité élastique.
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
DE59203473T DE59203473D1 (de) 1992-02-26 1992-02-26 Ringkerntransformator.
EP19920103238 EP0557549B1 (fr) 1992-02-26 1992-02-26 Transformateur à noyau annulaire
ES92103238T ES2076580T3 (es) 1992-02-26 1992-02-26 Transformador toroidal.

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 EP0557549A1 (fr) 1993-09-01
EP0557549B1 true 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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009138095A1 (fr) 2008-05-13 2009-11-19 Abb Technology Ag Transformateur sec
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
WO2009138101A1 (fr) 2008-05-13 2009-11-19 Abb Technology Ag Noyau toroïdal modulaire
DE102009017399A1 (de) 2008-06-07 2010-06-24 Volker Werner Hanser Transformator

Families Citing this family (7)

* 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
CA2282636A1 (fr) * 1999-09-16 2001-03-16 Philippe Viarouge Transformateurs et inducteurs d'alimentation pour applications a basses frequences utilisant des materiaux magnetiques composites isotropes a rapport puissance-poids eleve
PT1797573E (pt) * 2004-10-07 2009-05-21 Volker Werner Hanser Transformador de núcleo toroidal
DE112008003833A5 (de) * 2008-05-13 2011-02-24 Abb Technology Ag Trockentransformator
WO2009146835A2 (fr) * 2008-06-07 2009-12-10 Volker Werner Hanser Transformateur
EP2184749A1 (fr) 2008-11-08 2010-05-12 ABB Technology AG Agencement de segments d'enroulement
US7834736B1 (en) * 2009-07-31 2010-11-16 Abb Technology Ag Dry type pole-mounted transformer

Family Cites Families (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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009138095A1 (fr) 2008-05-13 2009-11-19 Abb Technology Ag Transformateur sec
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
WO2009138101A1 (fr) 2008-05-13 2009-11-19 Abb Technology Ag Noyau toroïdal modulaire
US8310330B2 (en) 2008-05-13 2012-11-13 Abb Technology Ag Dry-type transformer
DE102009017399A1 (de) 2008-06-07 2010-06-24 Volker Werner Hanser Transformator

Also Published As

Publication number Publication date
DE59203473D1 (de) 1995-10-05
ES2076580T3 (es) 1995-11-01
EP0557549A1 (fr) 1993-09-01

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