EP0510149B1 - Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite - Google Patents
Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite Download PDFInfo
- Publication number
- EP0510149B1 EP0510149B1 EP91919460A EP91919460A EP0510149B1 EP 0510149 B1 EP0510149 B1 EP 0510149B1 EP 91919460 A EP91919460 A EP 91919460A EP 91919460 A EP91919460 A EP 91919460A EP 0510149 B1 EP0510149 B1 EP 0510149B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shells
- coil former
- transformer
- shaped
- ring
- 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
Links
- 239000012777 electrically insulating material Substances 0.000 claims abstract 3
- 238000004804 winding Methods 0.000 claims description 40
- 239000004033 plastic Substances 0.000 claims description 13
- 239000011888 foil Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011889 copper foil Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 5
- 238000001746 injection moulding Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01F2005/025—Coils wound on non-magnetic supports, e.g. formers wound on coaxial arrangement of two or more formers
Definitions
- the invention relates to a transformer, in particular a small or safety transformer according to the preamble of claim 1, and a method for producing a transformer according to the preamble of claim 5.
- the European standard DIN VDE 0551 part 1 / 09.89 for isolating and safety transformers prescribes for a certain transformer output that coil formers of the type described above, i. H. those that are made from plastic by injection molding must have a wall thickness of at least 1 mm for safety reasons.
- coil formers of the type described above i. H. those that are made from plastic by injection molding must have a wall thickness of at least 1 mm for safety reasons.
- the above-mentioned standard allows the wall thickness of the coil body to be made less than 1 mm, even if the power is the same, if the coil body consists of at least three layers or layers and fulfills the required insulating properties.
- the standard recommends, for example, to manufacture a bobbin by winding a film strip that is feathered or perforated on its two longitudinal edges in four layers on a winding core in such a way that the feathered or perforated edge areas bend upwards, thereby creating a U-profile in cross section with side edge flanges for the bobbin. Due to the edge incisions (feathering) or perforation in the edge area, however, there are air gaps in every layer, ie places of reduced insulation. These are the reason why - how Tests have shown - coil bodies produced in this way sometimes do not meet the required insulating properties.
- DE-A-31 07 059 describes a coil former which is made from a multi-layer insulating tape winding and also has a U-profile in cross section.
- the three or more layers of insulating tape winding can be deformed by plastic deformation of its ends and then applied to the primary winding.
- the invention has for its object to provide a transformer with a standard-compliant bobbin, which has a much smaller wall thickness than 1 mm and ensures perfect insulation values especially in the area of the U-legs.
- the outer coil body of the transformer according to the invention consists of several shells, the standard is satisfied.
- the wall thickness of the shells can be chosen so that the total thickness of the shells lying one above the other is considerably less than 1 mm.
- the dimensional stability on the one hand and the plastic deformability on the other hand ensure that the shells can be joined together to form the annular coil former.
- Each of the shells has only one break in its circumference.
- Shells of the same type are preferably used for a coil former. However, this is not absolutely necessary.
- Another expedient development can consist in that a metal foil, preferably a copper foil, is inserted between at least two shells. In this way, electrical shielding of the windings lying one above the other can be ensured.
- the shells are designed in such a way that the ends formed by the interruption overlap in the assembled state of the coil former.
- the shells or partial shells can consist of thermoplastic material, which enables production by plastic deformation.
- annular shells when using annular shells, these can be opened one after the other by plastic bending at the interruptions and pushed over one another. This can be done in such a way that the interruptions all come to lie at the same point on the coil former or alternately at opposite points.
- a film material with a wall thickness of less than 100 microns, z. B. 80 microns are used, so that there is a very thin wall for the bobbin and therefore more space is available for the winding.
- a three-layer coil former for example, a total wall thickness of less than 300 ⁇ m can be achieved.
- This bobbin has the advantage over the bobbin produced by winding from foil tape that is recommended by the standard that gaps in the insulation are excluded.
- FIG. 1 shows a transformer 1 with an iron core 2, a first winding 3 and a second winding 4.
- the first winding 3 is wound on an inner coil former 5A, which encloses an opening 10 through which a leg 6 of the transformer core extends.
- the second winding 4 is located on an outer coil body 5B, which is arranged on the first winding 3. With 7 the winding axis of the two windings 3, 4 is designated.
- Figure 2 shows the inner coil body 5A with the winding 3 in a perspective view.
- this inner coil former 5A is designed as described below in connection with the outer coil former 5B.
- the outer coil body 5B consists of two partial bodies 5Ba and 5Bb.
- the two partial bodies each consist of several partial shells, of which only two are shown in FIG. 2.
- the partial shells 5Ba1 and 5Ba2 form the partial body 5Ba.
- the partial shells 5Bb1 and 5Bb2 form the partial body 5Bb.
- Each of the partial shells consists of a thermoplastic deformable film with a U-shaped cross section, the web of the U-profile being designated 9 and the edge flanges 11.
- the partial shells 5Ba1 and 5Ba2 are pushed on top of one another to form the partial body 5Ba.
- the partial shells 5Bb1 and 5Bb2 are pushed over one another to form the partial body 5Bb.
- the two partial bodies 5Ba and 5Bb then become the formation of the outer bobbin 5B is pushed onto the inner bobbin 5A in such a way that the ends meeting one another overlap.
- FIG. 3 shows a coil former 5 which is constructed in the same way as the coil former 5A and 5B in FIGS. 1 and 2.
- the bobbin 5 here consists of two C-shaped partial bodies 5a and 5b, which are set against one another at their ends 15, in such a way that they overlap in an overlap region U.
- the partial body 5a consists of three partial shells 5a1, 5a2 and 5a3 arranged in a box shape.
- the part body 5b consists of three box-shaped part shells 5b1, 5b2 and 5b3 arranged one inside the other.
- Each of the partial shells in turn has a U-profile and consists of a thermoplastic deformable film.
- the coil former 5 has two interruptions 18 as a result of the C-shaped partial bodies 5a, 5b placed against one another.
- FIG. 4 shows a coil former 5C which has only one interruption 18. It consists of three annular shells 5c1, 5c2 and 5c3 arranged one above the other in layers or one inside the other like boxes. Each of the shells has a U-profile in cross-section and consists of a thermoplastic plastic film. The shells are inherently stable, but plastically deformable. In particular, they can be bent open by moving their ends 15 away from one another. In the shape opened in this way, they can be put over the other shells and nested. As can be seen from FIG. 4, the ends 15 of the shells are alternately plugged together and form an overlap area Ü.
- a metal foil in particular a copper foil, can also be inserted between the shells or partial shells of all embodiments, in order thereby to provide a shield for the windings from other windings or from the iron core.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
- Coils Or Transformers For Communication (AREA)
- Details Of Television Scanning (AREA)
- Coils Of Transformers For General Uses (AREA)
- Fuses (AREA)
- Regulation Of General Use Transformers (AREA)
Claims (8)
- Transformateur, notamment petit transformateur ou transformateur de sécurité, avec des corps de bobine (5A, 5B) intérieur et extérieur annulaires en matériau électriquement isolant qui, dans un plan contenant l'axe (7) de l'anneau, présentent une section transversale sensiblement en forme de U, les branches (11) des U des corps de bobine (5A, 5B) étant orientées dans la direction opposée à l'axe (7) de l'anneau et formant des joues pour un enroulement de transformateur, le corps de bobine (5A) intérieur délimitant une cavité (10) destinée à recevoir une branche (6) de noyau et le corps de bobine (5B) extérieur présentant une stabilité de forme mais pouvant être déformé plastiquement sous l'action d'une force et comportant en au moins un point de son pourtour une discontinuité (18), les extrémités (15) formées par la discontinuité (18) se chevauchant, et avec un premier enroulement (3) de transformateur enroulé sur le corps de bobine (5A) intérieur et un second enroulement (4) de transformateur enroulé sur le corps de bobine (5B) extérieur, le premier enroulement (3) de transformateur étant isolé électriquement du second enroulement (4) de transformateur par le corps de bobine (5B) extérieur, caractérisé par le fait que le corps de bobine extérieur se compose d'au moins deux coquilles (5Ba1, 5Ba2, 5Bb1, 5Bb2, 5a1, 5a2, 5a3, 5b1, 5b2, 5b3, 5c1, 5c2, 5c3) annulaires disposées en couches l'une sur l'autre, parmi lesquelles chacune est intrinsèquement indéformable et peut être déformée plastiquement sous l'action de forces, par exemple par écartement et ne présente chaque fois qu'une seule discontinuité (18) sur son pourtour.
- Transformateur selon la revendication 1, caractérisé par le fait que les coquilles (5Ba1, 5Ba2, 5Bb1, 5Bb2, 5a1, 5a2, 5a3, 5b1, 5b2, 5b3, 5c1, 5c2, 5c3) sont identiques.
- Transformateur selon la revendication 1 ou la revendication 2, caractérisé par le fait qu'une feuille métallique, de préférence une feuille de cuivre est insérée entre au moins deux coquilles.
- Transformateur selon l'une des revendications précédentes, caractérisé par le fait que les coquilles sont en matériau thermoplastique.
- Procédé de fabrication d'un transformateur, en particulier d'un petit transformateur ou d'un transformateur de sécurité, selon lequel, sur un corps de bobine (5A) intérieur en matériau électriquement isolant qui définit une cavité destinée à recevoir une branche (6) de noyau on enroule un premier enroulement (3) de transformateur, on place sur le premier enroulement (3) de transformateur un corps de bobine (5B) extérieur et on enroule sur le corps de bobine (5B) extérieur un second enroulement (4) de transformateur, le premier enroulement (3) de transformateur étant isolé électriquement du second enroulement (4) de transformateur par le corps de bobine (5B) extérieur, le corps de bobine (5B) extérieur présentant dans un plan qui contient l'axe (7) des anneaux une section transversale sensiblement en forme de U et les branches (11) du U étant orientées dans la direction opposée à l'axe (7) des anneaux et formant des joues pour l'enroulement, caractérisé par le fait qu'à partir d'un matériau plan en bande on fabrique par formage plastique des profilés en U, par le fait qu'à partir des profilés en U on réalise par formage plastique des coquilles (5c, 5c1, 5c2, 5c3) annulaires ou des parties de coquille (5Aa, 5Ab, 5Ba1, 5Ba2, 5Bb1, 5Bb2) en forme de C qui, en l'absence d'effort appliqué, présentent une forme stable et peuvent être déformées plastiquement sous l'action de forces, par le fait qu'à partir des coquilles (5c, 5c1, 5c2, 5c3) annulaires ou des parties de coquille (5Aa, 5Ab, 5Ba1, 5Ba2, 5Bb1, 5Bb2) en forme de C on assemble le corps de bobine extérieur en enfilant l'une sur l'autre au moins deux coquilles (5c1, 5c2, 5c3) annulaires ou au moins deux parties de coquille (5Aa, 5Ab, 5a1, 5b1) en forme de C de manière telle que leurs extrémités (15) se chevauchent, puis on enfile sur les premières parties de coquille (5Aa, 5Ab, 5a1, 5b1) en forme de C au moins deux parties de coquille (5Ba1, 5Ba2, 5Bb1, 5Bb2, 5a2, 5b2, 5a3, 5b3) en forme de C supplémentaires de manière telle que leurs extrémités se chevauchent et par le fait que l'on enfile les coquilles ou les parties de coquille du corps de bobine (5B) extérieur sur le premier enroulement (3) de transformateur.
- Procédé selon la revendication 5, caractérisé par le fait que l'on fabrique simultanément, par formage plastique, en une opération unique, à partir de plusieurs bandes planes disposées l'une sur l'autre, plusieurs profilés en U et à partir de ceux-ci plusieurs coquilles annulaires ou plusieurs parties de coquille en forme de C.
- Procédé selon la revendication 6, caractérisé par le fait que lorsqu'on utilise des coquille annulaires, on ouvre celles-ci successivement par formage plastique au niveau des discontinuités et on les enfile l'une sur l'autre.
- Procédé selon la revendication 7, caractérisé par le fait que l'on enfile les coquilles annulaires successivement l'une sur l'autre de manière telle que les discontinuités soient disposées en alternance en des points opposés du corps de bobine extérieur.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4036275A DE4036275A1 (de) | 1990-11-14 | 1990-11-14 | Ringfoermiger spulenkoerper fuer klein- und sicherheitstranformatoren und verfahren zu seiner herstellung |
DE4036275 | 1990-11-14 | ||
PCT/EP1991/002144 WO1992009092A1 (fr) | 1990-11-14 | 1991-11-13 | Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0510149A1 EP0510149A1 (fr) | 1992-10-28 |
EP0510149B1 true EP0510149B1 (fr) | 1996-01-31 |
Family
ID=6418259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91919460A Expired - Lifetime EP0510149B1 (fr) | 1990-11-14 | 1991-11-13 | Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0510149B1 (fr) |
JP (1) | JPH05505910A (fr) |
AT (1) | ATE133811T1 (fr) |
AU (1) | AU650301B2 (fr) |
DE (2) | DE4036275A1 (fr) |
ES (1) | ES2084835T3 (fr) |
WO (1) | WO1992009092A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005007334B4 (de) * | 2005-02-17 | 2007-02-08 | Siemens Ag | Summenstromwandler zur allstromsensitiven Erfassung eines elektrischen Differenzstromes |
US9985488B2 (en) * | 2011-07-22 | 2018-05-29 | RWXT Nuclear Operations Group, Inc. | Environmentally robust electromagnets and electric motors employing same for use in nuclear reactors |
DE202013104681U1 (de) * | 2013-10-16 | 2013-11-27 | Vallon Gmbh | Entmagnetisierungsspule |
DE102014202531A1 (de) * | 2014-02-12 | 2015-08-13 | Siemens Aktiengesellschaft | Hochspannungstransformatorvorrichtung mit einstellbarer Streuung, Wechselrichterschaltung mit einer Hochspannungstransformatorvorrichtung und Verwendung einer Hochspannungstransformatorvorrichtung |
CN106252031B (zh) | 2015-06-12 | 2020-08-04 | 松下知识产权经营株式会社 | 磁性器件及使用该磁性器件的功率变换装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB250261A (en) * | 1925-04-02 | 1926-08-12 | Gen Electric | Improvements in or relating to electric transformers |
US2167539A (en) * | 1937-12-28 | 1939-07-25 | Gen Electric | Method of making flanged cylinders |
US2723933A (en) * | 1950-01-31 | 1955-11-15 | Hans D Isenberg | Method of making preformed insulation for high voltage transformer |
GB739762A (en) * | 1953-04-03 | 1955-11-02 | Forges Ateliers Const Electr | Improvements in high-tension transformer windings |
DE2208457A1 (de) * | 1972-02-23 | 1973-08-30 | Loewe Opta Gmbh | Wickelkoerper fuer transformatoren |
GB1495783A (en) * | 1975-02-10 | 1977-12-21 | Stroemberg Oy Ab | Voltage transformer |
DE3107059A1 (de) * | 1981-02-25 | 1982-09-09 | Siemens AG, 1000 Berlin und 8000 München | Elektrischer uebertrager |
-
1990
- 1990-11-14 DE DE4036275A patent/DE4036275A1/de not_active Withdrawn
-
1991
- 1991-11-13 AT AT91919460T patent/ATE133811T1/de not_active IP Right Cessation
- 1991-11-13 EP EP91919460A patent/EP0510149B1/fr not_active Expired - Lifetime
- 1991-11-13 AU AU88622/91A patent/AU650301B2/en not_active Expired
- 1991-11-13 ES ES91919460T patent/ES2084835T3/es not_active Expired - Lifetime
- 1991-11-13 JP JP91517383A patent/JPH05505910A/ja active Pending
- 1991-11-13 DE DE59107357T patent/DE59107357D1/de not_active Expired - Fee Related
- 1991-11-13 WO PCT/EP1991/002144 patent/WO1992009092A1/fr active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
AU8862291A (en) | 1992-06-11 |
WO1992009092A1 (fr) | 1992-05-29 |
ATE133811T1 (de) | 1996-02-15 |
EP0510149A1 (fr) | 1992-10-28 |
AU650301B2 (en) | 1994-06-16 |
JPH05505910A (ja) | 1993-08-26 |
DE59107357D1 (de) | 1996-03-14 |
ES2084835T3 (es) | 1996-05-16 |
DE4036275A1 (de) | 1992-05-21 |
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