EP0365407B1 - Leistungstransformator mit reduzierter Erhitzung - Google Patents

Leistungstransformator mit reduzierter Erhitzung Download PDF

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Publication number
EP0365407B1
EP0365407B1 EP19890402833 EP89402833A EP0365407B1 EP 0365407 B1 EP0365407 B1 EP 0365407B1 EP 19890402833 EP19890402833 EP 19890402833 EP 89402833 A EP89402833 A EP 89402833A EP 0365407 B1 EP0365407 B1 EP 0365407B1
Authority
EP
European Patent Office
Prior art keywords
parts
transformer
plane
winding
circuit
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
EP19890402833
Other languages
English (en)
French (fr)
Other versions
EP0365407A1 (de
Inventor
Jean-Yves Buatois
Jean-Michel Bouillot
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.)
Orega Electronique et Mecanique
Original Assignee
Orega Electronique et Mecanique
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 Orega Electronique et Mecanique filed Critical Orega Electronique et Mecanique
Publication of EP0365407A1 publication Critical patent/EP0365407A1/de
Application granted granted Critical
Publication of EP0365407B1 publication Critical patent/EP0365407B1/de
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
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H01F2005/022—Coils wound on non-magnetic supports, e.g. formers wound on formers with several winding chambers separated by flanges, e.g. for high voltage applications

Definitions

  • the present invention relates to a power transformer with reduced heating.
  • these transformers are provided with thermal radiators and / or they are combined with means of forced ventilation, which significantly increases their size.
  • the ventilation means are not immune to breakdowns.
  • the present invention relates to a power transformer not requiring cooling means, or at least with cooling means less important than those of a conventional transformer with the same electrical characteristics, for the same operating temperature.
  • the object of the present invention relates to a transformer comprising a winding composed of two identical parts connected in parallel each of these two parts comprising at least one winding.
  • a transformer is for example disclosed by EP-A-0 287 307.
  • the transformer according to the invention is characterized in that its magnetic circuit is composed of two identical circuit parts arranged symmetrically with respect to a plane, each of these two circuit parts carrying one of said winding parts.
  • these winding parts are being wound symmetrically with respect to said plane of symmetry.
  • the transformer described below is a low voltage transformer intended for example for a switching power supply. Its magnetic circuit consists of two "E" ferrites. It is understood that the invention is not limited to such an application and to such a type of transformer: the transformer can be both at low and at high voltage and its circuit can as well be made of ferrite as it is made of 'a stack of sheets. In addition, it suffices that the two halves of this magnetic circuit are practically identical, their shape possibly being different from an "E".
  • the transformer winding 1 is very simplified in FIG. 1.
  • This winding consists of two half-windings 2,3. These half-windings 2,3 are identical and arranged symmetrically with respect to a plane of symmetry, the trace 4 of which is shown in the drawing.
  • each half-winding 2,3 comprises five windings wound in the form of wafers.
  • These wafers are referenced A, B, C, D, E for the half-winding 2 and A ', B', C ', D', E 'for the half-winding 3.
  • the wafers A' to E ' are respectively identical to the pancakes A to E.
  • Identical pancakes are arranged symmetrically with respect to said plane of symmetry (trace 4), the pancakes A and A 'being the closest to this plane and the pancakes E and E' the most distant.
  • the magnetic circuit of the transformer comprises, as shown in FIG. 2, two identical parts 5,6 of ferrite in the shape of "E" arranged symmetrically with respect to said plane of symmetry.
  • the two outer legs of each "E” are the same length (legs 7.8 for part 5 and legs 9.10 for part 6).
  • the inner legs of the "E" (leg 11 for part 5 and leg 12 for part 6) are shorter than the outer legs, which provides a gap 13 between these inner legs. Because this air gap is located in the center of the coil, where the thickness of the carcass is greatest, the environmental disturbances caused by the flourishing of the field lines in the air gap are reduced.
  • the winding carcass 14, partially shown in FIG. 2 has the form of a tube (of circular section in the present example) supporting several discs (of circular peripheral shape in the present example).
  • the plane 4 passes through the center of the central disk 15.
  • the other four disks visible in FIG. 2 are arranged symmetrically with respect to the plane 4, namely the disks 16, 17 on one side of the disk 15 and the disks 16 'and 17 'on the other side, and respectively symmetrical of the discs 16 and 17.
  • the winding wafers A, B are wound between the discs 15,16 and 16,17 respectively while the winding wafers A', B ' are wound between the discs 15,16 'and 16', 17 'respectively.
  • the thickness of the disc 15 is greater than that of the other discs of the carcass 14 to prevent the wafers A and A 'from being at the level of air gap 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • General Induction Heating (AREA)

Claims (5)

  1. Leistungstransformator mit reduzierter Erwärmung vom Typ mit einem aus zwei gleichen, parallel geschalteten Teilen (2, 3) zusammengesetzten Wickel, wobei jeder der zwei Teile wenigstens eine Wicklung (A, A' ...) aufweist, dadurch gekennzeichnet, daß sein Magnetkreis aus zwei gleichen Kreisteilen (5, 6) zusammengesetzt ist, die bezüglich einer Ebene (4) symmetrisch angeordnet sind, wobei jeder dieser zwei Teile des Magnetkreises einen der zwei Teile (2, 3) des Wickels trägt.
  2. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß die zwei Teile des Wickels symmetrisch bezüglich der Symmetrieebene (A und A', B und B' ...) gewickelt sind.
  3. Transformator nach einem der vorhergehenden Ansprüche, dessen Magnetkreis zwei Kreisteile aufweist, die jeweils im Schnitt die Form eines "E" haben, dadurch gekennzeichnet, daß der Luftspalt am Ende des Mittelschenkels (11, 12) des "E" liegt.
  4. Transformator nach einem der vorhergehenden Ansprüche, dessen Wickelkörper (14) aus Scheiben zusammengesetzt ist, die an einem Zylinder gebildet sind, dadurch gekennzeichnet, daß der Wickelkörper eine Mittelscheibe (15) aufweist, die in der Symmetrieebene des Transformators liegt, wobei die anderen Scheiben (16, 17, 16', 17') symmetrisch beiderseits der Mittelscheibe angeordnet sind.
  5. Transformator nach Anspruch 4, dadurch gekennzeichnet, daß die Mittelscheibe eine größere Dicke als die anderen Scheiben hat.
EP19890402833 1988-10-21 1989-10-13 Leistungstransformator mit reduzierter Erhitzung Expired - Lifetime EP0365407B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8813830 1988-10-21
FR8813830A FR2638277A1 (fr) 1988-10-21 1988-10-21 Transformateur de puissance a echauffement reduit

Publications (2)

Publication Number Publication Date
EP0365407A1 EP0365407A1 (de) 1990-04-25
EP0365407B1 true EP0365407B1 (de) 1993-06-09

Family

ID=9371202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890402833 Expired - Lifetime EP0365407B1 (de) 1988-10-21 1989-10-13 Leistungstransformator mit reduzierter Erhitzung

Country Status (5)

Country Link
EP (1) EP0365407B1 (de)
DE (1) DE68907007T2 (de)
DK (1) DK175598B1 (de)
ES (1) ES2041025T3 (de)
FR (1) FR2638277A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4340020A1 (de) * 1993-11-24 1995-06-01 Sachsenwerk Ag Induktiver elektrischer Wandler

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT359161B (de) * 1976-12-29 1980-10-27 Elin Union Ag Wickelkoerper fuer die sekundaerwicklung eines hochspannungs-transformators
CS231460B1 (en) * 1982-02-02 1984-11-19 Ivan Kotora Transformer for rectifiers
US4806834A (en) * 1987-04-16 1989-02-21 Donald Goodman Electrical circuit for inductance conductors, transformers and motors

Also Published As

Publication number Publication date
ES2041025T3 (es) 1993-11-01
DK175598B1 (da) 2004-12-13
DK515089A (da) 1990-04-22
DK515089D0 (da) 1989-10-17
DE68907007T2 (de) 1993-11-04
FR2638277A1 (fr) 1990-04-27
EP0365407A1 (de) 1990-04-25
DE68907007D1 (de) 1993-07-15

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