EP2139801A1 - Vertical-stratification winding machine for electric transformers - Google Patents
Vertical-stratification winding machine for electric transformersInfo
- Publication number
- EP2139801A1 EP2139801A1 EP08735362A EP08735362A EP2139801A1 EP 2139801 A1 EP2139801 A1 EP 2139801A1 EP 08735362 A EP08735362 A EP 08735362A EP 08735362 A EP08735362 A EP 08735362A EP 2139801 A1 EP2139801 A1 EP 2139801A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- expander
- spirals
- winding
- windings
- stratification
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/76—Depositing materials in cans or receptacles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/082—Devices for guiding or positioning the winding material on the former
Definitions
- transformer windings of the medium/high-voltage type set in cast resin or in oil the following techniques are typically used:
- the winding machine automated to a greater or lesser degree, turns the coils about the horizontal axis (X), depositing the conductor (1) with one spiral next to the other.
- the wire distributor of the winding machine inverts the movement from Xi to X 2 , working backwards and forwards, until the number of layers required by the electrical specification has been reached, and with the layers rising through the Y axis.
- One or more sheets of insulating material (2) are normally inserted between one layer and the next.
- the galette-winding technique is similar to the technique described in paragraph A, however the difference is that the winding is divided into n disks in accordance with the electrical design (cf. Fig. 3).
- the winding machine performs stratification from Xi to X 2 for the single galettes and the layers are deposited through the Y axis.
- the conductor (1) is manually transferred to the next galette.
- the galettes are not created by producing layers from Xi to X 2 but by superimposing them through the Y axis. The last spiral of each galette is manually delivered by the operator at the start of the following galette. An insulation film is inserted between the layers.
- This technique is mainly used in medium-voltage coils for resin transformers. 2. THE TECHNIQUE FOR WHICH A PATENT APPLICATION IS BEING SUBMITTED In the technique used with the machine for which an industrial invention patent is now being sought, the winding is performed as per the process illustrated in Fig. 1.
- the coil which is being wound is placed in the vertical rather than in the horizontal position as would occur in traditional technology.
- the spirals are preformed by a variable-geometry expander (2), which transforms them into concentric spirals, and by a rotating capstan (1) as shown in the figure.
- the expander (2) is located in the upper position and lets the spirals fall and deposit by gravitational force. In this way, the layers are gradually formed and grow in volume through the Y axis.
- Each spiral is formed with a progressive variation of the diameter of the expander, moving from Xi to X 2 and vice versa in accordance with the parameters of the electrical calculation.
- the preformed spirals fall by the force of gravity, however they are not arranged in an exactly geometrical manner as represented in the drawing in Fig. 1 but in a random fashion with a packing rate very close to the geometrical maximum.
- the stacking obtained is in fact close to that of a perfectly geometrical arrangement of spirals.
- 'stacking' factor here refers to the ratio between the net section of the conductors and the occupied geometrical section.
- the first immediate advantage obtainable with the machine for which an application is being submitted is a drastic reduction in winding times with respect to those typical of technology hitherto adopted and which were described above in section 1.
- variable-geometry expander Figl (point 2) is the technical mechanism with which it is possible to produce the type of winding described above.
- the technique can be developed in two ways: the first way is represented schematically in the figure in Fig. 5.
- the conductor (7) arrives at the centre of the expander by means of relay pulleys (4) and then reaches the satellite wheel (capstan) (6). It is then inserted under an elastic belt (5) which, turning around the expander, forms the circular spiral and is then freed when it has completed a rotation of about 240 ⁇ 270°.
- the expander continuously varies in diameter, from Xi to X 2 , in accordance with the electrical specification and with a diameter variation at each rotation equal to 2 times the diameter of the conductor used at that moment. The expander does not turn about the Y axis but remains still, like the coil which is being formed.
- the conductor, Fig. 6 (point 7) reaches the expander (3) guided by a system of pulleys (8) and inserts itself under the elastic belt (5), which holds it fast and forces it to assume a circular form. After a rotation of about 240 ⁇ 270°, the spiral is released.
- the expander (3) varies in diameter from X] to X 2 in accordance with the electrical specification and with diameter variation at each rotation equal to 2 times the diameter of the conductor used at that moment. All of this occurs in a manner similar to the process illustrated in figure 5.
- the substantial difference between the two methods lies in the fact that in this latter method the expander (3) rotates about the Y axis, as does the coil which is being formed, while the satellite wheel (6) remains still.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Of Transformers For General Uses (AREA)
- Transformers For Measuring Instruments (AREA)
- Insulators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000124A ITVI20070124A1 (en) | 2007-04-27 | 2007-04-27 | RADIAL STRATIFIED WRAPPING MACHINE FOR ELECTRIC TRANSFORMERS |
PCT/EP2008/003235 WO2008131889A1 (en) | 2007-04-27 | 2008-04-23 | Vertical-stratification winding machine for electric transformers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2139801A1 true EP2139801A1 (en) | 2010-01-06 |
EP2139801B1 EP2139801B1 (en) | 2011-03-02 |
Family
ID=39709272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08735362A Not-in-force EP2139801B1 (en) | 2007-04-27 | 2008-04-23 | Vertical-stratification winding machine for electric transformers |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2139801B1 (en) |
AT (1) | ATE500182T1 (en) |
DE (1) | DE602008005287D1 (en) |
IT (1) | ITVI20070124A1 (en) |
WO (1) | WO2008131889A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1398014B1 (en) * | 2010-02-05 | 2013-02-04 | Falloppi | DEVICE FOR CONCENTRIC CIRCULAR LOOPS WITH VARIABLE DIAMETER OF MALLEABLE MATERIALS |
WO2014002122A1 (en) * | 2012-06-28 | 2014-01-03 | Gianfranco Gonella | Radial windings with rectangular conductors |
US9214273B2 (en) | 2013-06-11 | 2015-12-15 | Abb Technology Ag | Radial drop winding for open-wound medium voltage dry type transformers with improved support structure |
CN115258226B (en) * | 2022-07-05 | 2023-10-31 | 钢铁研究总院有限公司 | Welding wire layered packaging device and method and layered disc-shaped welding wire |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3270979A (en) * | 1964-12-14 | 1966-09-06 | Donald P Whitacre | Wire coiling machine having grooved block |
US5507322A (en) * | 1993-12-14 | 1996-04-16 | Abb Power T&D Company Inc. | Device and method for forming planar disk transformer windings |
JPH11157749A (en) * | 1997-11-28 | 1999-06-15 | Hitachi Cable Ltd | Method and device for taking wire on spiral wire receiving stand |
-
2007
- 2007-04-27 IT IT000124A patent/ITVI20070124A1/en unknown
-
2008
- 2008-04-23 DE DE602008005287T patent/DE602008005287D1/en active Active
- 2008-04-23 EP EP08735362A patent/EP2139801B1/en not_active Not-in-force
- 2008-04-23 AT AT08735362T patent/ATE500182T1/en not_active IP Right Cessation
- 2008-04-23 WO PCT/EP2008/003235 patent/WO2008131889A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008131889A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2139801B1 (en) | 2011-03-02 |
WO2008131889A1 (en) | 2008-11-06 |
DE602008005287D1 (en) | 2011-04-14 |
ITVI20070124A1 (en) | 2008-10-28 |
ATE500182T1 (en) | 2011-03-15 |
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