EP0252396A1 - Insulating board between a winding and a core sheet pack and ballast or transformer provided with said insulating board - Google Patents
Insulating board between a winding and a core sheet pack and ballast or transformer provided with said insulating board Download PDFInfo
- Publication number
- EP0252396A1 EP0252396A1 EP19870109312 EP87109312A EP0252396A1 EP 0252396 A1 EP0252396 A1 EP 0252396A1 EP 19870109312 EP19870109312 EP 19870109312 EP 87109312 A EP87109312 A EP 87109312A EP 0252396 A1 EP0252396 A1 EP 0252396A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- insulating board
- outer side
- ballast
- side flaps
- 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.)
- Granted
Links
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
- Coils Of Transformers For General Uses (AREA)
- Transformers For Measuring Instruments (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
- The present invention relates to an insulating board between the winding and the core sheet pack of a ballast or transformer, said board being intended to be placed between the inner surface of the gable of a winding loop and the gable of a core sheet pack extending through the winding loop opening.
- The invention also relates to a ballast or transformer provided with said insulating board and the winding loop opening, the winding of the transformer being rectangular when seen in the direction of the winding axis and wherein the longer side runs of the winding are surrounded with separate surface insulations. 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, i.e. causes and requires laborious, 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 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.
- It is a major object of the present invention to eliminate the above problems by using a specially designed insulating board between winding and core sheet pack.
- The characterizing features of an insulating board of the invention are set forth in the annexed
claim 1.Claim 2 discloses the characterizing features of a ballast or transformer provided with an insulating board of the invention, whereasclaim 3 reflects a particular form of realization of an insulating board according to the invention. - 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 gables are fitted with insulating boards of the invention shown in cross-section,
- Fig. 2 is a side view of an insulating board of the invention, and
- Fig. 3 is a cross-sectional view of a winding into which an insulating board shown in Fig. 2 is inserted in the direction of an arrow I.
- 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 a core sheet pack, its longer side runs 6 are surrounded with
separate surface insulations 3. Aninsulating board 11 is fitted between theinner surface 4 of winding gable 7 and the core sheet pack extending throughopening 5. - The insulating
board 11 carries, by way ofhinge 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 end ofinsulating board 11. Alternatively, catch means 15 ormembers 12a can be made so long that said catch means 15 engage with each other. Then, however, theouter side flaps 12 must be bent further aside, so that the insulating board, designed generally byreference numeral 1, can be fitted in position around winding 2. Preferably, this is done immediately after the winding has been wound with thesurface insulations 3 fitted in position. Thus, insulatingboard 11, together with itsouter side flaps 12, prevents the swelling of a winding and, at the same time, fastenssurface insulations 3 upon the winding. The gap betweeninsulating board 11 and theouter side flaps 12 is dimensioned so as to serve this purpose when catch means 14 and 15 are engaged with each other. - One of the
outer side flaps 12 can be provided with winding thread clamping pins or with a groove receiving a clamping rib, the fastening of winding thread outlets being resolved at the same time.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI862815A FI77337C (en) | 1986-07-02 | 1986-07-02 | EN ISOLERSKIVA MELLAN LINDNING OCH KAERNPLAOTPACKE OCH DROSSEL ELLER TRANSFORMATOR FOERSEDD MED ISOLERSKIVAN. |
FI862815 | 1986-07-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0252396A1 true EP0252396A1 (en) | 1988-01-13 |
EP0252396B1 EP0252396B1 (en) | 1992-05-20 |
Family
ID=8522874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870109312 Expired EP0252396B1 (en) | 1986-07-02 | 1987-06-29 | Insulating board between a winding and a core sheet pack and ballast or transformer provided with said insulating board |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0252396B1 (en) |
DE (1) | DE3779193D1 (en) |
ES (1) | ES2031089T3 (en) |
FI (1) | FI77337C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102867627B (en) * | 2012-10-16 | 2016-03-30 | 南车株洲电力机车研究所有限公司 | A kind of insulating method of IGCT transformer and device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3691493A (en) * | 1971-09-30 | 1972-09-12 | Allen Bradley Co | Coil plate assembly |
DE2360402B2 (en) * | 1973-12-04 | 1975-09-25 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Coil arrangement with a bobbin for double coils |
-
1986
- 1986-07-02 FI FI862815A patent/FI77337C/en not_active IP Right Cessation
-
1987
- 1987-06-29 ES ES87109312T patent/ES2031089T3/en not_active Expired - Lifetime
- 1987-06-29 EP EP19870109312 patent/EP0252396B1/en not_active Expired
- 1987-06-29 DE DE8787109312T patent/DE3779193D1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3691493A (en) * | 1971-09-30 | 1972-09-12 | Allen Bradley Co | Coil plate assembly |
DE2360402B2 (en) * | 1973-12-04 | 1975-09-25 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Coil arrangement with a bobbin for double coils |
Also Published As
Publication number | Publication date |
---|---|
FI862815A (en) | 1988-01-03 |
ES2031089T3 (en) | 1992-12-01 |
EP0252396B1 (en) | 1992-05-20 |
FI77337B (en) | 1988-10-31 |
DE3779193D1 (en) | 1992-06-25 |
FI77337C (en) | 1989-02-10 |
FI862815A0 (en) | 1986-07-02 |
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