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(11) | EP 0 252 396 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
Insulating board between a winding and a core sheet pack and ballast or transformer provided with said insulating board Isolierplatte zwischen Windungen und Kernpaket, sowie Vorschaltdrossel oder Transformator mit dieser Isolierplatte Plaque isolante entre des spires et un empilage de tôles de noyau ainsi que ballast ou transformateur muni de cette plaque isolante |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The invention concerns the combination of a ballast or a transformer having a winding and a core sheet pack and an insulating board assembly, the insulating board assembly comprising an insulating board between the inner surface of the end face of a winding loop of the winding and the end face of the core sheet pack extending through the winding loop opening.
[0002] One problem in manufacturing ballasts or transformers is the fastening of separate surface insulations surrounding the winding by means of binding tapes. The fastening of binding tapes is hitherto performed through manual labour which causes and requires labourious and monotonous, slow and expensive work which cannot be automated with reasonable arrangements. Another problem in manufacturing ballasts or transformers is the swelling of a winding as a result of the movement of the winding threads. This may complicate the fitting of a winding in a core sheet pack, unless the winding windows are dimensioned with sufficiently great tolerances.
[0003] It is the object of the present invention to eliminate the above mentioned problems by using a specially designed insulating board between the winding and the core sheet pack.
[0004] In order to meet this object the invention proposes that said insulating board carries, by way of hinge members, outer side flaps whose free ends are provided with catch means which can be brought into engagement either with each other or with counter-catch means at the corresponding end of the insulating board, whereby, with the outer side flaps turned into a position, in which the catch means are in engagement with each other, the take-up openings for the winding will be formed between the edges of the insulating board and the outer side flaps.
[0005] It is known to form the winding and thus the winding loop opening of a ballast or transformer in a rectangular shape when seen in the direction of the winding axis and to surround the longer side runs of the winding with separate surface insulatings. According to a further feature of the invention the insulating board assembly comprising the insulating board, the hinge member and the outer side flaps surrounds the end sections of the surface insulations. According to a further embodiment of the invention one of the outer side flaps of the insulating board assembly is provided with clamping pins or with a groove for receiving a clamping rib.
[0006] A particularly appropriate embodiment of the invention will now be described with reference made to the accompanying drawing, in which
- Fig. 1
- is a plan view of a ballast winding, whose end faces are fitted with insulating boards of the invention shown in cross-section,
- Fig. 2
- is a side view of an insulating board assembly of the invention, and
- Fig. 3
- is a cross-sectional view of a winding into which an insulating board shown in Fig. 2 can be inserted in the direction of an arrow I.
[0007] Fig. 1 shows a ballast winding 2 which is rectangular, as seen in the direction of the winding axis. A not shown ballast core sheet pack extends through a winding loop opening 5 and also on the outer faces of winding side runs 6. For insulating the winding 2 from the core sheet pack, its longer side runs 6 are surrounded with separate surface insulations 3. An insulating board 11 is fitted between the inner surface 4 of the winding end faces 7 and the core sheet pack extending through opening 5.
[0008] The insulating board 11 carries, by way of hinge members 13, outer side flaps 12 whose free ends are provided with catch means 15 that can be brought into engagement with counter-catch means 14 at the corresponding ends of the insulating board 11. Alternatively, the catch means 15 or the ends 12a can be made so long that said catch means 15 engage with each other. Then, however, the outer side flaps 12 must be bent further aside, so that the insulating board assembly, designed generally by reference numeral 1, can be fitted in position around winding 2. Preferably, this is done immediately after the winding has been wound with the surface insulations 3 fitted in position. Thus, the insulating board 11, together with its outer side flaps 12, prevents the swelling of a winding and, at the same time, fastens the surface insulations 3 upon the winding. The gap between the insulating board 11 and the outer side flaps 12 is dimensioned so as to serve against swelling when the catch means 14 and 15 are engaged with each other.
1. The combination of a ballast or a transformer having a winding (2) and a core sheet
pack and an insulating board assembly (1), the insulating board assembly (1) comprising
an insulating board (11) between the inner surface (4) of the end face of a winding
loop of the winding (2) and the end face of the core sheet pack extending through
the winding loop opening (5), whereby the insulating board (11) carries, by way of
hinge members (13), outer side flaps (12) whose free ends (12a) are provided with
catch means which can be brought into engagement either with each other or with counter-catch
means (14) at the corresponding end of the insulating board (11) whereby, with the
outer side flaps (12) turned into a position, in which the catch means (14, 15) are
in engagement with each other, the take-up openings for the winding (2) will be formed
between the edges of the insulating board (11) and the outer side flaps (12).
2. The combination according to claim 1, wherein the winding loop opening (5) is rectangular
when seen in the direction of the winding axis and wherein the longer side runs (6)
of the winding (2) are surrounded with separate surface insulations (3), the end sections
of the surface insulations (3) being surrounded by the insulating board (11), the
hinge members (13) and the outer side flaps (12).
3. The combination according to claim 2, wherein one of the outer side flaps (12) of
the insulating board assembly (1) is provided with clamping pins or with a groove
for receiving a clamping rib.
1. Combinaison d'un ballast ou transformateur ayant un enroulement (2) et un empilage
de tôles de noyau et un ensemble de plaque isolante (1), l'ensemble de plaque isolante
(1) comprenant une plaque isolante (11) entre la surface intérieure (4) de la face
d'extrémité d'une boucle d'enroulement de l'enroulement (2) et la face d'extrémité
de l'empilage de tôles de noyau qui s'étend à travers l'ouverture de la boucle d'enroulement
(5), la plaque isolante (11) portant, au moyen d'organes articulés (13), des volets
de face extérieure (12) dont les extrémités libres (12a) sont équipées de moyens d'engrènement
qui peuvent amenés en prise soit l'un avec l'autre, soit avec des moyens d'engrènement
antagonistes (14) à l'extrémité correspondante de la plaque isolante (11) ce par quoi,
lorsque les volets de face extérieure (12) sont tournés dans une position dans laquelle
les moyens d'engrènement (14, 15) sont en prise l'un avec l'autre, les ouvertures
d'enroulement pour l'enroulement (2) seront formées entre les arêtes de la plaque
isolante (11) et les volets de face extérieure (12).
2. Combinaison selon la revendication 1, dans laquelle l'ouverture de la boucle d'enroulement
(5) est rectangulaire lorsqu'elle est vue dans le sens de l'axe de l'enroulement et
dans laquelle les bords courants du long côté (6) de l'enroulement (2) sont entourés
par des isolations de surface séparées (3), les sections d'extrémité des isolations
de surface (3) étant entourées par la plaque isolante (11), les organes articulés
(13) et les volets de face extérieure (12).
3. Combinaison selon la revendication 2, dans laquelle l'un des volets de face extérieure
(12) de l'ensemble de plaque isolante (1) est équipé de chevilles de serrage ou d'une
rainure pour recevoir une nervure de serrage.
1. Die Kombination eines Ballastwiderstandes oder eines Transformators, der eine Windung
(2) und einen Kernblechstapel aufweist, mit einer Isolierplatteneinheit (1), die eine
Isolierplatte (11) zwischen der inneren Fläche (4) der Endfläche einer Windungsschlaufe
(2) und der Endfläche des Kernblechstapels umfaßt, der sich durch die Windungsschlaufenöffnung
(5) erstreckt, bei der die Isolierplatte (11) an Gelenkgliedern (13) äußere Seitenklappen
(12) trägt, deren freien Enden (12a) mit Verschlußmitteln versehen sind, die in Eingriff
entweder miteinander oder mit Gegenverschlußmitteln (14) an dem entsprechenden Ende
der Isolierplatte (11) gebracht werden können, wodurch bei in eine solche Position
gedrehten äußeren Seitenklappen (12), in der die Eingriffsmittel (14, 15) miteinander
in Eingriff stehen, die Aufnabmeöffnungen für die Windung (2) zwischen den Kanten
der Isolierplatte (11) und den äußeren Seitenklappen (12) geformt werden.
2. Die Kombination nach Anspruch 1, bei der die Windungsschlaufenöffnung (5) rechteckig
ist, gesehen in der Richtung der Windungsachse, und bei der die längeren Seitenabschnitte
(6) der Windung (2) von gesonderten Oberflächenisolationen (3) umgeben sind, wobei
die Endabschnitte der Oberflächenisolation (3) von der Isolierplatte (11), den Gelenkgliedern
(13) und den äußeren Seitenklappen (12) umgeben sind.
3. Die Kombination nach Anspruch 2, bei der eine der äußeren Seitenklappen (12) der Isolierplatteneinheit
(1) mit Klemmstiften oder mit einer Rille zur Aufnahme einer Klemmrippe versehen ist.