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EP0793243B1 - Transformateur - Google Patents

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Publication number
EP0793243B1
EP0793243B1 EP97102525A EP97102525A EP0793243B1 EP 0793243 B1 EP0793243 B1 EP 0793243B1 EP 97102525 A EP97102525 A EP 97102525A EP 97102525 A EP97102525 A EP 97102525A EP 0793243 B1 EP0793243 B1 EP 0793243B1
Authority
EP
European Patent Office
Prior art keywords
chamber
cover cap
transformer according
winding
partition
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
EP97102525A
Other languages
German (de)
English (en)
Other versions
EP0793243A1 (fr
Inventor
Reinhard Lecheler
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0793243A1 publication Critical patent/EP0793243A1/fr
Application granted granted Critical
Publication of EP0793243B1 publication Critical patent/EP0793243B1/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
    • H01F27/32—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

Definitions

  • the present invention relates to a transformer according to the preamble of claim 1.
  • Transformers are used in a wide variety of areas. Under Others are transformers for the operation of halogen incandescent lamps used, with an input voltage of e.g. 230 volts or 240 ... 245 volts is transformed into an output voltage of 6 volts, 12 volts or 24 volts. Output transformers in electronic converters for halogen lamps transform from half the mains voltage (e.g. 115 volts) to e.g. 12 volts.
  • a winding body and a cover cap, each made of plastic, for one such transformers are e.g. from the company NORWE, Ing. Norbert Weiner GmbH offered (see product brochure "Protection class bobbin UNI ", 11/1991).
  • the known transformer is relatively complex built up.
  • the cover cap is in one piece with walls relatively smaller Wall thickness trained.
  • there is a Another disadvantage of the known transformer in that the assembly of Transformer winding body on the one hand and the part consisting of cover cap and walls, on the other hand, is difficult because of multiple points of the winding body against the corresponding points of the part from the cap and walls correctly positioned before plugging together need to be bent and walls mechanically slightly against each other can be.
  • the document DE-A-3 241 408 discloses a transformer with a winding body and an insulating hood.
  • the insulating hood is U-shaped and insulated the windings arranged on the winding body against each other and opposite the core sheets of the transformer.
  • the insulation hood is on bridged its open end by a bracket to prevent the insulation hood is inadvertently or easily separated from the winding body can be.
  • the object of the invention based on specifying a transformer that has lower temperature values and easy to assemble.
  • the transformer according to the invention is designed so that on the one hand Much of the heat developed is dissipated and that on the other hand adequate insulation between the primary and secondary windings is guaranteed.
  • the cover cap or, preferably, in one piece with it trained components, namely a first partition and second Partitions designed so that the assembly of winding body and cover cap is made possible in a simple manner.
  • the simple and error-free assembly of winding bodies with differently designed chambers for the primary winding or Secondary winding on the one hand and cover cap on the other hand also serve first coding element, which is arranged on the winding body, and a second coding element, which corresponds to the first coding element and on the cover cap or on a component connected to it is arranged.
  • the manufacture of the cover cap and the winding body is due their wall thicknesses in spraying technology relatively simple; to the injection molds there are no special requirements. For the cap tool no sliders are required. Overall thus achieved relatively low tool costs.
  • the good insulating properties of the transformer according to the invention serve also an insulating bar which is provided on the winding body.
  • the transformer according to the invention is further configured in such a way that the generation of safety extra-low voltages (Safety Extra Low Voltage SELV) is made possible.
  • the invention relates to a transformer, in particular in a frequency range is operated above the mains frequency.
  • the transformer has at least one primary winding and at least one secondary winding on and a winding body 1 (Fig. 1-9, 16-24), on which in a first chamber 11 the primary winding and on that in a second chamber 12 the secondary winding is arranged.
  • a core 2 (FIGS. 16, 20, 22 and 24) can be inserted into the winding body in the preferred operating range (with frequencies above the mains frequency) is in particular a ferrite core.
  • the winding body has a receiving element 13 (FIGS. 1-3, 6), in particular a groove which receives a cover cap 3 (Fig. 10-17, 19, 21 and 24).
  • the covering cap 3 (FIG. 16) covers only a partial area of the primary winding, which is wound in the first chamber 11, and a portion the secondary winding, which is wound in the second chamber 12 is. This is the section in which the primary winding and the secondary winding adjoin each other.
  • the cover cap 3 is thus designed that much of the heat developed in the two windings is dissipated becomes. In the area of the two windings, which is not through the cover cap is covered, the heat is directly to the environment of the transformer.
  • the cover cap ensures due to their dimensions, however, adequate insulation between primary and secondary winding; a ("first") air and Creepage distance between the primary and secondary windings runs along the cap and is at least 4.5 millimeters, in particular 4.8 Millimeter.
  • the first clearance and creepage distance on the one hand runs from the primary winding over the cover 3 to the secondary winding (or in the opposite direction); on the other hand, the first clearance and creepage distance runs from the primary winding via a first chamber wall 111, a first Partition wall 31 and a second chamber wall 112 to the secondary winding.
  • the first clearance and creepage distance on the one hand runs from the primary winding below a plate 32 ( Figures 10-16) to the secondary winding and on the other hand from the primary winding horizontally across the Receiving element 13.
  • the width of the cap surface is at least 4.5 millimeters; a preferred value is 4.8 millimeters.
  • a preferred value is even with unfavorable arrangement of the windings (windings, the should be arranged side by side are actually on top of each other arranged) sufficient insulation is formed.
  • the covering cap 3 is essentially perpendicular to the covering cap 3 arranged first partition 31 (Fig. 16 and 24) formed in assembled state between the first chamber 11 and the first chamber wall 111 and second chamber 12 or second chamber wall 112 is arranged.
  • the air and creepage distance over the first partition is thus meandering extended.
  • the wall thickness of the first or second chamber wall is e.g. 0.4 millimeters and the wall thickness of the first partition is 0.6 millimeters.
  • cover cap 3 and the first partition 31 are preferably in one piece educated.
  • cover cap 3 and first partition are 31 further with a plate 32 (Fig. 10-13, 16, 19-24) on which in the assembled State of the core rests, and in one piece with second partitions 33 educated.
  • the plate 32 is arranged parallel to the cover cap 3.
  • the second partitions 33 connect the cap 3 and the plate 32 in the way with each other that plate 32, second partitions 33 and cap 3 form a step-like structure.
  • the stability of complex 3 - 31-33-32 is achieved in particular by the plate 32.
  • the first chamber 11 faces the second chamber 12 Side up the first chamber wall 111, while the second chamber 12 on hers the second chamber wall 112 facing the first chamber 11 has ( Figure 1). So there is one between primary and secondary winding double-walled structure is provided, the first partition 31 is inserted between the two chamber walls.
  • Both chamber walls 111 and 112 are parallel to each other and in the manner spaced that the first partition 31 at least in the assembled state arranged in a partial area between the two chamber walls 111, 112 is.
  • the first partition 31 is U-shaped ( Figure 12), the U-legs the partition 31 in the assembled state the middle leg of the Enclose core 2 on the side.
  • the already mentioned second partitions 33 which are preferably in one piece are formed with the cover cap, serve to isolate the first or the second winding in each case opposite the core 2.
  • a second clearance and creepage distance runs between the primary winding and Core 2 on the one hand and between secondary winding and core 2 on the other; it is preferably at least 2.0 mm and in particular 3 mm.
  • the second air and creepage distance is through the second partition walls 33 lengthened, in particular about 2.5 mm - 2.8 mm above the top of the Protruding core 2.
  • the first and the second chamber of the winding body 1 are in particular of different sizes (chamber 1 is larger than chamber 2).
  • a first coding element 14 on the winding body 1 (FIGS. 1, 17; e.g. a nose) arranged, which corresponds to a second coding element 34 (FIG. 11), that on the cap 3 or one connected to the cap Part (e.g. 33) is arranged.
  • the first and the second chamber of the winding body 1 are in particular not only of different sizes, but also differently isolated: the Insulation thickness between the primary winding and core is 0.4 mm (cf. hatched area in Figure 5, lateral areas and upper area), while the insulating material thickness between the secondary winding and the core 0.8 mm (see hatched area in Figure 8).
  • This configuration brings Advantages for the placement of the transformer (only less insulation of the Components on the board that are connected to the primary winding are required towards the core).
  • the winding body 1 of the transformer has an insulating web 15 (FIGS. 1, 4, 7) which is arranged horizontally and therefore parallel to the core 2 (FIG. 22)
  • Spacer feet 35 are arranged on the plate 32, which are used to fix the transformer on a circuit board.
  • the invention also relates to the covering cap 3 (FIGS. 10-19, 21-24) or complex 3 - 31 - 33 - 32 as well as the corresponding winding body 1 ( Figures 1 - 9)
  • the structure of the winding body 1, the cover 3 and the entire Transformer with the ferrite core 2 is shown in detail in the figures.
  • the winding body 1 is shown, the first chamber 11 and has a second chamber 12.
  • a first chamber wall 111 of the first Chamber 11 and a second chamber wall 112 of the second chamber 12 immediately adjacent, parallel and spaced in such a way that a first Partition (31; Fig. 10) in the assembled state between the first and second chamber is arranged.
  • the insulating bars are arranged that an air and creepage distance of at least 3 mm between around wire winding mandrels 16 wires and one in the coil or Winding body 1 inserted (ferrite) core is forcibly realized; she are so arranged that even with production-related fluctuations the winding wire position is adequately insulated.
  • first coding element a nose 14 formed on the winding body 1
  • second coding element 34; FIG 15
  • a receiving element 13 which is designed as a groove, shown in the figure, which serves to accommodate the actual cap (3; Fig. 10).
  • FIG. 2 shows a plan view of the winding body 1 according to FIG. 1, with the Components shown and described there.
  • Fig. 3 shows a view of the winding body from below, numbers 1-8 of connections are stamped into the winding body.
  • Fig. 4 shows a side view of the winding body, the first Coding element 14 in the upper and lower region of the winding body 1 and an insulating web 15 are shown.
  • Fig. 5 shows the inside of the first chamber 11
  • Fig. 6 shows the configuration the first and second chamber walls 111, 112, which are the receiving element Form 13 for receiving the actual cap.
  • Fig. 7 again shows a side view of the winding body with a Insulating bridge 15.
  • Fig. 8 shows the inside of the second chamber 12 and Fig. 9 also shows that Interior of the second chamber 12 with the second chamber wall 112.
  • the 10 shows the cover cap 3, which has a partition 31, with side walls, and formed with a substantially horizontal plate 32 is. This makes the complex cover cap 3, partitions 31, 33 and plate 32 mechanically sufficiently stable.
  • the plate 32 is preferably 1 millimeter thick. It serves as a support surface for the (ferrite) core 2 and as a support for Spacer feet 35.
  • Fig. 11 shows this body with second partitions 33, the plate 32 and the spacer feet 35.
  • FIG. 12 shows the section C-C according to FIG. 10 and FIG. 13 the section D-D according to Fig. 10.
  • this body is again shown from below, the is formed in one piece; it includes the actual cap 3, the first Partition 31, the plate 32, second partitions 33, as in the figure can be formed, the second coding element 34 and spacer feet 35.
  • Fig. 15 shows the view of the body shown in Fig. 14 from above.
  • FIG. 16 shows the transformer according to the invention, the one described above Winding body 1, a ferrite core 2 and the cover cap 3 with the connected components (31, 32, 33, 34 and 35), the first partition 31 lies between the chamber walls 111 and 112.
  • Fig. 17 is a top view of the transformer while Fig. 18 is the Transformer from below.
  • FIG. 19 shows the transformer from one side
  • FIG. 20 shows one Section through the transformer.
  • 21 again shows a side view of the transformer
  • Fig. 22 is a section through the Represents transformer
  • 23 shows the transformer from the side
  • 24 shows a section through the transformer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulating Of Coils (AREA)

Claims (16)

  1. Transformateur comprenant au moins un enroulement primaire et au moins un enroulement secondaire, une pièce (1) d'enroulement d'un seul tenant sur laquelle sont montés dans une première chambre (11) l'enroulement primaire et dans une seconde chambre (12) l'enroulement secondaire, pièce dans laquelle peut être introduit un noyau notamment un noyau (2) de ferrite, et un chapeau (3) de recouvrement, la pièce (1) d'enroulement comportant un élément (13) de réception d'un chapeau (3) de recouvrement, le chapeau (3) de recouvrement ayant une première cloison (31) disposée sensiblement perpendiculairement au chapeau (3) de recouvrement et interposée à l'état monté entre la première chambre (11) et la seconde chambre (12), caractérisé en ce que le chapeau (3) de recouvrement ne recouvre qu'une région partielle de l'enroulement primaire et de l'enroulement secondaire, région partielle dans laquelle l'enroulement primaire et l'enroulement secondaire sont adjacents et le chapeau (3) de recouvrement est relié à un plateau (32) sur lequel, à l'état monté, est monté le noyau (2).
  2. Transformateur suivant la revendication 1, caractérisé en ce que le chapeau (3) de recouvrement et la première cloison (31) sont d'un seul tenant.
  3. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que la première chambre (11) comporte, sur son côté tourné vers la seconde chambre (12), une première paroi (111) de chambre, en ce que la seconde chambre (12) comporte, sur son côté tourné vers la première chambre (11), une deuxième paroi (112) de chambre, en ce que la première paroi (111) de chambre et la deuxième paroi (112) de chambre sont parallèles et sont à distance l'une de l'autre, de sorte que la première cloison (31) soit à l'état monté au moins dans une région partielle comprise entre les parois (111, 112) de chambre.
  4. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que la cloison (31) est en forme de U et en ce que les branches du U de la cloison (31) entourent latéralement à l'état monté une partie du noyau (2) qui est disposée dans la pièce (1) d'enroulement.
  5. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que le capuchon (3) de recouvrement est relié à deux cloisons (33) qui, à l'état monté, sont disposées entre la première chambre (11) et la seconde chambre (12),d'une part, et le noyau (2), d'autre part.
  6. Transformateur suivant la revendication 5, caractérisé en ce que le chapeau (3) de recouvrement, la première cloison (31), le plateau (32) et/ou les deuxièmes cloisons (33) sont d'un seul tenant.
  7. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que la pièce (1) d'enroulement comporte un premier élément (14) de codage qui correspond à un second élément (34) de codage qui est disposé sur le chapeau (3) de recouvrement ou sur une pièce reliée au chapeau de recouvrement.
  8. Transformateur suivant l'une des revendications précédentes, caractérisé en ce qu'un premier entrefer et zone de fuite entre l'enroulement primaire et l'enroulement secondaire est à l'état monté d'au moins 4,5 mm, notamment de 4, 8 mm.
  9. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que le premier entrefer et zone de fuite s'étend le long du chapeau (3) de recouvrement.
  10. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que le premier entrefer et zone de fuite s'étend le long de la première paroi (111) de chambre, de la première cloison (31) et de la deuxième paroi (112) de chambre.
  11. Transformateur suivant l'une des revendications précédentes, caractérisé en ce qu'un deuxième entrefer et zone de fuite entre l'enroulement primaire et le noyau (2), d'une part, et entre l'enroulement secondaire et le noyau (2), d 'autre part, est d'au moins 2,0 mm, notamment de 3 mm.
  12. Transformateur suivant la revendication 11, caractérisé en ce que le deuxième entrefer et zone de fuite s'étend au-dessus des deuxièmes cloisons reliées au chapeau (3) de recouvrement et en dessous du plateau (32).
  13. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que la pièce (1) d'enroulement comporte une âme (15) isolante parallèle au noyau (2).
  14. Transformateur suivant l'une des revendications précédentes, caractérisé par des pieds (35) d'entretoisement montés sur le plateau (32).
  15. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que l'épaisseur de la première paroi (111) de chambre et l'épaisseur de la deuxième paroi (112) de chambre sont chacune de 0,4 mm.
  16. Transformateur suivant l'une des revendications précédentes, caractérisé en ce que l'épaisseur de la première cloison (31) est de 0,6 mm.
EP97102525A 1996-02-29 1997-02-17 Transformateur Expired - Lifetime EP0793243B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607714A DE19607714A1 (de) 1996-02-29 1996-02-29 Transformator
DE19607714 1996-02-29

Publications (2)

Publication Number Publication Date
EP0793243A1 EP0793243A1 (fr) 1997-09-03
EP0793243B1 true EP0793243B1 (fr) 2001-05-02

Family

ID=7786808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97102525A Expired - Lifetime EP0793243B1 (fr) 1996-02-29 1997-02-17 Transformateur

Country Status (4)

Country Link
US (1) US5783982A (fr)
EP (1) EP0793243B1 (fr)
CA (1) CA2198656C (fr)
DE (2) DE19607714A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1693860A1 (fr) 2005-02-22 2006-08-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Transformateur à chambres multiples
CN101057305B (zh) * 2004-11-15 2011-07-06 电灯专利信托有限公司 变压器及相关装配方法
CN105097239A (zh) * 2014-05-15 2015-11-25 胜美达集团株式会社 变压器绕线管及变压器

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11297535A (ja) * 1998-04-14 1999-10-29 Tamura Seisakusho Co Ltd カバー付小型トランス
US6906609B1 (en) 2000-04-07 2005-06-14 Astec International Limited Planar transformer
US6727793B2 (en) 2001-08-21 2004-04-27 Astec International Limited Low-power transformer for printed circuit boards
DE10343489A1 (de) * 2003-09-19 2005-04-14 Comatec S.N.C. Transformator, insbesondere Sicherheitstransformator zum Einbau in Unterputzdosen
JP2005286188A (ja) * 2004-03-30 2005-10-13 Tamura Seisakusho Co Ltd トランス
ATE389232T1 (de) * 2004-10-19 2008-03-15 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Isolieranordnung für elektrische bauelementen
EP1796112B1 (fr) * 2005-12-06 2010-05-05 Osram Gesellschaft mit Beschränkter Haftung Transformateur à chambres multiples
TW200807462A (en) * 2006-07-28 2008-02-01 Delta Electronics Inc Transformer with insulating structure
US20120223795A1 (en) * 2011-03-02 2012-09-06 Power Integrations, Inc. Shroud for bobbin
US8766756B2 (en) * 2011-03-02 2014-07-01 Power Integrations, Inc. Transverse shroud and bobbin assembly
DE102014116139A1 (de) * 2014-11-05 2016-05-12 Epcos Ag Induktives Bauelement

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Publication number Priority date Publication date Assignee Title
DE2104421B2 (de) * 1971-01-30 1972-03-16 Weiner, Norbert, 5275 Bergneustadt Spulenkoerper
GB1426822A (en) * 1973-05-23 1976-03-03 Miles Platts Ltd Transformers
US4405913A (en) * 1981-08-17 1983-09-20 Mid-West Transformer Company Coil body
DE3241408A1 (de) * 1982-11-09 1984-05-10 Norbert 5275 Bergneustadt Weiner Spulenkoerper
JPS61168617A (ja) * 1985-01-21 1986-07-30 Sanyo Kokusaku Pulp Co Ltd 高純度臭素化エポキシ樹脂の製造法
US4716394A (en) * 1987-03-12 1987-12-29 Cosmo Plastics Company Bobbin device
US4980664A (en) * 1990-03-08 1990-12-25 Prem Magnetics Incorporated Transformer bobbin
DE9103712U1 (de) * 1991-03-26 1991-06-27 Rudolf Michael GmbH, 7519 Eppingen Spulenkörper
US5534839A (en) * 1995-04-05 1996-07-09 Cramer Coil & Transformer Co., Inc. Miniature transformer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101057305B (zh) * 2004-11-15 2011-07-06 电灯专利信托有限公司 变压器及相关装配方法
EP1693860A1 (fr) 2005-02-22 2006-08-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Transformateur à chambres multiples
CN105097239A (zh) * 2014-05-15 2015-11-25 胜美达集团株式会社 变压器绕线管及变压器
CN105097239B (zh) * 2014-05-15 2017-04-05 胜美达集团株式会社 变压器绕线管及变压器

Also Published As

Publication number Publication date
CA2198656C (fr) 2006-08-01
EP0793243A1 (fr) 1997-09-03
DE19607714A1 (de) 1997-09-04
US5783982A (en) 1998-07-21
CA2198656A1 (fr) 1997-08-29
DE59703458D1 (de) 2001-06-07

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