EP0843325B1 - Petit transformateur - Google Patents

Petit transformateur Download PDF

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Publication number
EP0843325B1
EP0843325B1 EP97119679A EP97119679A EP0843325B1 EP 0843325 B1 EP0843325 B1 EP 0843325B1 EP 97119679 A EP97119679 A EP 97119679A EP 97119679 A EP97119679 A EP 97119679A EP 0843325 B1 EP0843325 B1 EP 0843325B1
Authority
EP
European Patent Office
Prior art keywords
transformer according
small transformer
small
coil
winding
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
EP97119679A
Other languages
German (de)
English (en)
Other versions
EP0843325A1 (fr
Inventor
Werner Böser
Armin Weyel
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.)
A Grothe & Sohne & Co KG GmbH
Original Assignee
A Grothe & Sohne & Co KG 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 A Grothe & Sohne & Co KG GmbH filed Critical A Grothe & Sohne & Co KG GmbH
Publication of EP0843325A1 publication Critical patent/EP0843325A1/fr
Application granted granted Critical
Publication of EP0843325B1 publication Critical patent/EP0843325B1/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
    • H01F27/02—Casings
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H01F2027/406—Temperature sensor or protection

Definitions

  • the invention relates to small transformers, such as safety, bell or fail-safe transformers, with a coverable or covered with a cover through such a cover at least partially formed plastic housing, in which is arranged a two-legged sheet metal core, the package parts of which are form-fitting anchor with each other, with primary and arranged on one of the legs other provided secondary winding, preferably at least one of the Windings can be switched off and / or one of the windings is thermally switched changing, current limiting resistor is protected.
  • Such small transformers are designed as safety transformers or as Bell transformers are used, in which the secondary of the primary winding safely is separated and the windings are conditionally short-circuit proof, whereby after Possibility to switch off the request.
  • DE-U-295 12 753 discloses a generic small transformer which consists of is composed of many individual parts. Such, at least conditionally short-circuit proof In the past, transformers were provided with magnetic shunts; a simpler and cheaper solution is seen in the current over one of the windings to lead a resistor with a positive temperature dependency, so that when rising the current into impermissible areas by increasing the temperature of the resistor and thus the ohmic resistance of the winding current is limited. As problematic but the construction turns out.
  • the invention is therefore based on the task of building a to create such a small transformer, which consists of relatively few, there are easy to manufacture parts that are easy to assemble to let.
  • FIG. 1 shows an offset longitudinal section through a small transformer shown the right-hand side against the median plane only slightly up to the middle level of the second of four tension clamps 20 is offset while he is on the left in front of the left coil body 1 shown and in the central plane one of the Cover 21 holding spring hook 25 of the base plate 8 out is.
  • the core 1 and 2 are penetrated by core packages 3 and 4, the loosely layered and through the bobbin 1 and 2 are held together as packages.
  • Projections 5 engage in the compilation of the core packages Recesses of the core package opposite them (plug-in plates), so that solid and stable without any additional means Sheet metal cores can be obtained.
  • the one-piece molded bobbin 1 and 2 point beyond their flanges 6 downwards Support plates 7, which extend tangentially to the laminated cores and stand up with its lower edge on the base plate 8.
  • the support plates are equipped with vertical ribs 9, which after assembly overlapped by hooks 10 made in one piece with the base plate 8 become.
  • the coil formers 1, 2 thus hold the yokes of the core packages together, positively with each other through the projections 5 are connected, and the wound bobbins 1, 2 are by means of the hook 10 and connected to the base plate 8 under tension, being on the end faces of their support plates 7 and / or lean on the lower base of the core package 4.
  • the base areas the sheet metal tangent vertical ribs of low height Coil bobbins make it easier to insert those to be accommodated with an interference fit Core packages.
  • the base plate 8 has a rectangular on its underside Recess 11 for mounting on standard rails 12. Is on the left the flank of the recess is provided with cams 13, which on one side reach under the outer flange of the standard rail 12. On the opposite side a spring cam 14 is guided in the base plate 8, which over the opposite flange can be pressed and snapped into place but also for removing the small transformer from the standard rail can be withdrawn by tools.
  • the end walls 15 of the base plate 8 have openings in the center 16 for terminal lugs 17 of the primary or secondary coil, and they include a stem 18 to form articulated recesses 19 for tension clamps 20 with captive screws.
  • the transformer is closed by putting one on Cover 21 with the central areas 22 of their end faces the recesses 19 except for openings 23 for connecting wires and further openings 47 for access by a screwdriver to the Heads of the captive screws of the clamp clamps 20, while the end face 22 shown on the left in its Cutting plane an opening 24 or at least recesses has one in the provided on both sides of the base plate Spring hook 25 engages and thus in association with three others Spring hook holds the cover 21 on the base plate 8.
  • connection areas formed in the middle of the end faces of the cover 21 of the small transformer are also overlapping by it Cover caps 26 protected.
  • These cover caps have one Support collar 27 on, with the areas of the end faces 22 of the cover 21 are affected tangentially.
  • At the free end of the Support collar hook projections 28 are formed, which breakthroughs 29 of the cover 21 penetrating the top cap 26 on this hold.
  • An opening 30 is provided in the upper region of the top cap, through the with a tool a cup-like approach 31 des Support collar can be reached, by means of which the support collar 27 is detachable from the cover 21.
  • the coil formers 1, 2 and thus the transformer Support plates 7 are with recesses for receiving PTC resistors 32 equipped, and further recesses and / or through projecting ledges 33 formed bottlenecks or in such ledges
  • the proposed passages serve to receive and define theirs Supply lines.
  • the PTC resistors 32 can also have no recesses the support plate 7 may be arranged flanking. With that you can easily accommodate one or more PTC resistors if desired, and their connections are the contact lugs of the coil formers adjacent that they can be connected directly to them or to winding ends are.
  • a usable in connection with such a small transformer Switch 46 is shown in Figure 2.
  • a contact carrier 36 With a contact carrier 36 it overlaps an edge region of the upper flange 6 of the coil former 1. At least one of the contacts 37 can directly with one End of the winding picked up by the coil body. The close both contacts one behind the other in the drawing a gap between them that can be bridged by a steel ball 38 is.
  • This steel ball is in a guide shaft 39 held, which is provided on the underside of a safety edge 40 is.
  • the switching strip reaches through with its actuating plate 41 a slot of the cover 21 and is on with its surface the inner surface of the cover 21, as well as its flanks leading against the cover 21 or parts of the bobbin 1 support.
  • FIG. 3 A view of this switching strip 40 is shown in FIG. 3 shown, which also has a centering pin 42 for a steel ball 38 shows prestressing compression spring 43.
  • This compression spring 43 is expediently made of a non-oxidizing steel alloy, for example V2
  • FIG. 4 shows an alternative possibility: Injection molding of the switching strip 40, the guide shaft 39 is in one piece equipped with a resilient plastic strip 44, the one Steel ball 38 is able to bias.
  • the description shows that a Dispensing with such a switch is readily possible by the relevant parts are omitted and a closed cover is used in which the top surface without a corresponding slot executed. is.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Insulating Of Coils (AREA)

Claims (17)

  1. Petit transformateur comportant un boítier en matière plastique susceptible d'être refermé ou coiffé par un capot de couverture (21) ou encore formé au moins en partie par un tel capot de couverture (21), boítier dans lequel est disposé un noyau de tôles (3, 4) à deux bras dont les empilements (3, 4) viennent s'ancrer par coopération de formes les uns dans les autres, comportant des corps de bobinage (1, 2) traversés par les empilements (3, 4) et comportant un enroulement primaire disposé sur l'un des bras et un enroulement secondaire prévu sur l'autre bras, l'un au moins des enroulements pouvant être déconnecté et/ou l'un des enroulements étant protégé par une résistance (32) à variation thermique qui limite le courant, caractérisé par
    des plateaux de support (7) qui sont reliés aux corps de bobinage (1, 2), qui flanquent les tôles du noyau de tôles (3, 4) au-delà de leurs brides (6) et qui s'étendent jusqu'à une platine de base (8) du boítier en matière plastique ou jusqu'au capot de couverture (21),
    une résistance CTP (32) portée par des baguettes (33) d'un plateau de support inférieur (7) et flanquant celles-ci,
    des crochets (10) de la platine de base (8) du transformateur qui coiffent des nervures verticales (9) des plateaux de support inférieurs (7), et par
    d'autres crochets élastiques (25) de la platine de base (8) qui viennent s'ancrer dans des traversées (24) du capot de couverture (21).
  2. Petit transformateur selon la revendication 1, caractérisé en ce que l'un au moins des plateaux de support (7) présente des évidements pour recevoir une résistance CTP (32) et ses bornes.
  3. Petit transformateur selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que les baguettes en saillie (33) présentent des perçages pour recevoir les fils de connexion de la résistance CTP (32) ou sont disposées par paire à faible distance pour les recevoir.
  4. Petit transformateur selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il est prévu au-dessus de la bride supérieure (6) de l'un des corps de bobinage (1, 2) un interrupteur (46) réalisé sous forme d'interrupteur à coulisse dont la plaque d'actionnement (41) traverse une fente du capot de couverture (21).
  5. Petit transformateur selon l'une quelconque des revendications 1 à 4, caractérisé par un porte-contact (36) équipé de deux contacts (37) et posé sur une zone, détournée de l'empilement de noyau (3, 4), de la bride (6) d'un corps de bobinage (1), porte-contact sur lequel est menée en translation une baguette de commutation (40), et il est prévu au-dessous de la plaque d'actionnement (41) de ladite baguette un puits de guidage (39) dirigé contre le porte-contact (36) et dans lequel est guidée une bille métallique (37) sollicitée par un ressort.
  6. Petit transformateur selon la revendication 5, caractérisé en ce que le puits de guidage (39) comprend un ressort hélicoïdal (43) centré de préférence par un tenon (42).
  7. Petit transformateur selon la revendication 6, caractérisé en ce que le ressort hélicoïdal (43) est enroulé à partir d'un fil en alliage d'acier inoxydable.
  8. Petit transformateur selon la revendication 5, caractérisé en ce que le puits de guidage (39) de la baguette de commutation (40) comprend une bande injectée en matière plastique (44) pour presser le corps métallique (bille métallique 38) contre les contacts (37).
  9. Petit transformateur selon l'une quelconque des revendications 5 à 8, caractérisé en ce que le porte-contact (36) est disposé sur la zone tournée vers l'extérieur de la bride supérieure (6) du porte-bobine (1) qui comprend l'enroulement primaire, en ce qu'il s'étend transversalement aux tôles des empilements de noyau (3, 4), et en ce qu'il engage par l'arrière des nervures angulaires (45) du corps de bobinage (1).
  10. Petit transformateur selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la paroi frontale (15) de la platine de base (8) présente des deux côtés des évidements (19) pour recevoir des étriers de serrage (20), et en ce qu'elle est munie de traversées (16) pour recevoir des bornes de connexion (17) des corps de bobinage (1, 2), lesquelles sont menées dans les étriers de serrage (20).
  11. Petit transformateur selon la revendication 10, caractérisé en ce que des surfaces frontales (22) du capot de couverture (21) coiffent les évidements (19), des ouvertures (23) étant prévues pour des fils de connexion des étriers de serrage (20) ainsi que des ouvertures (47) pour des tournevis.
  12. Petit transformateur selon l'une quelconque des revendications 1 à 11, caractérisé par des capuchons de recouvrement (26) qui coiffent ses bornes électriques et qui viennent se poser par une collerette d'appui supérieure intérieure (27) au-dessus des étriers de serrage (20) contre la zone centrale des parois frontales (22) du capot de couverture (21), et dont les collerettes d'appui (27) comprennent des talons formant crochets (28) s'engageant dans des traversées (29) des surfaces frontales (22) du capot de couverture (21) ainsi qu'au-dessus de ceux-ci un talon respectif en forme de godet (31) avec une cavité ouverte vers le haut, qui sont coiffés par une ouverture (30) des capuchons de recouvrement (26).
  13. Petit transformateur selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la platine de base (8) est pourvue d'un évidement rectangulaire (11) pour recevoir des rails normalisés (12), dont les flancs d'un côté sont munis de cames (13) et dont les flancs opposés sont pourvus de cames élastiques (14).
  14. Petit transformateur selon l'une quelconque des revendications 1 à 13, caractérisé en ce que l'enroulement primaire du corps de bobinage (1) est constitué par deux enroulements partiels superposés, et en ce que la fin de l'enroulement partiel inférieur ainsi que le début de l'enroulement partiel supérieur sont reliés chacun à l'un des contacts (37) de l'interrupteur (36).
  15. Petit transformateur selon l'une quelconque des revendications 1 à 14, caractérisé en ce que le début ou la fin de l'enroulement primaire du corps de bobinage (1) est connecté(e) à l'un des fils de connexion de la résistance CTP (32) dont le second fil de connexion est fixé sur l'une des bornes de connexion (17) du corps de bobinage (1) de l'enroulement primaire.
  16. Petit transformateur selon l'une ou l'autre des revendications 14 et 15, caractérisé en ce qu'un film isolant est interposé entre les deux enroulements partiels de l'enroulement primaire.
  17. Petit transformateur selon l'une quelconque des revendications 1 à 16, caractérisé en ce que les faces latérales intérieures des corps de bobinage (1, 2), lesquelles flanquent les surfaces de base des tôles des empilements de noyau (3, 4) comprennent des nervures verticales de faible hauteur.
EP97119679A 1996-11-16 1997-11-11 Petit transformateur Expired - Lifetime EP0843325B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29619953U DE29619953U1 (de) 1996-11-16 1996-11-16 Kleintransformator
DE29619953U 1996-11-16

Publications (2)

Publication Number Publication Date
EP0843325A1 EP0843325A1 (fr) 1998-05-20
EP0843325B1 true EP0843325B1 (fr) 2000-05-17

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ID=8032038

Family Applications (1)

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EP97119679A Expired - Lifetime EP0843325B1 (fr) 1996-11-16 1997-11-11 Petit transformateur

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EP (1) EP0843325B1 (fr)
DE (2) DE29619953U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106601454A (zh) * 2016-11-30 2017-04-26 山东电力设备有限公司 一种自耦三相变压器开关支撑结构

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19706448C2 (de) * 1997-02-19 2002-01-17 Schupa Gmbh Klingeltransformator mit oder ohne Schalter
DE19915355A1 (de) * 1999-04-06 2000-10-26 Vossloh Schwabe Gmbh Elektrische Verbindungs- oder Anschlußklemme
US20020196120A1 (en) * 2001-06-20 2002-12-26 Hopkinson Philip J. Non-energy limiting class 2 transformer with positive temperature protection
CN109273200A (zh) * 2018-12-06 2019-01-25 贵州大学 一种具有除尘隔离功能的煤矿用变压器
CN114005638B (zh) * 2021-09-15 2023-11-03 江苏志博电气有限公司 一种具有防盗以及报警功能的油浸式变压器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3240986A1 (de) * 1982-11-05 1984-05-10 Gebrüder Frei GmbH & Co KG, 7470 Albstadt Transformator
DE29512753U1 (de) * 1995-08-08 1995-10-19 Grothe & Soehne Gmbh & Co Kg A Sicherheitstransformator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106601454A (zh) * 2016-11-30 2017-04-26 山东电力设备有限公司 一种自耦三相变压器开关支撑结构
CN106601454B (zh) * 2016-11-30 2018-11-23 山东电力设备有限公司 一种自耦三相变压器开关支撑结构

Also Published As

Publication number Publication date
DE59701703D1 (de) 2000-06-21
DE29619953U1 (de) 1997-01-23
EP0843325A1 (fr) 1998-05-20

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