EP0782755A1 - Stromzuführungsleiter aus der leiterfolie der folienwicklung eines leistungstransformators - Google Patents
Stromzuführungsleiter aus der leiterfolie der folienwicklung eines leistungstransformatorsInfo
- Publication number
- EP0782755A1 EP0782755A1 EP95930376A EP95930376A EP0782755A1 EP 0782755 A1 EP0782755 A1 EP 0782755A1 EP 95930376 A EP95930376 A EP 95930376A EP 95930376 A EP95930376 A EP 95930376A EP 0782755 A1 EP0782755 A1 EP 0782755A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- power supply
- foil
- supply conductor
- end pieces
- flag
- 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
-
- 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
-
- 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
- H01F27/2847—Sheets; Strips
- H01F27/2852—Construction of conductive connections, of leads
Definitions
- the invention relates to a laminated current supply conductor of a power transformer with an air-cooled film winding wound from a strip-shaped conductor film, the film end of which forms a plurality of tab-like end pieces due to slits running in the longitudinal direction of the film, which end pieces form one opposite the film longitudinal direction bent stack of the power supply conductor are folded.
- a power supply conductor is from "Electrical Equipment", Jul./Aug. 1974, pages 60 to 62.
- Rail no longer holds useful electricity; that is, for electricity transportation it no longer makes any significant contribution in the film.
- Only eddy currents which generate additional losses are induced in the more distant part of the power supply rail.
- Particularly high eddy currents are induced in the supply rails at the winding edges by the foil winding.
- the film winding shows greatly increased current densities due to the current displacement effect.
- This increased flow through the film winding induces eddy currents in the cross-sectional plane of the supply rails and thus additional losses. If the sum of the losses in the area of the supply lines becomes too large in the case of highly utilized transformers, an attempt is made to solve this problem by changing the conductive cross section or by changing the electrical conductivity due to the use of different material or by improving the cooling . Combined measures are also used for this.
- This object is achieved in that the flag-like, folded end pieces of the conductor stack are mutually insulated at least in the region of the winding edge of the unslit film part.
- End pieces need only be guided a few centimeters from the line of the elongated long side of the unslit film part to the outside in isolation; further outside (outside the area of the film winding) one can do without insulation of the flag-like end pieces and carry them on without insulation or let them pass into a massive supply rail.
- Figure 6 shows another special embodiment of such a power supply conductor.
- Figure 7 shows a diagram of the current drop on a corresponding power supply conductor.
- connection foil For an effective reduction of the power loss in a power supply conductor and an associated connection foil of the foil winding of a power transformer, there is one 4 Lamination of the cross section of the power supply conductor and its shortening to an electrically effective length are provided.
- a controlled introduction of current into the connection foil reduces the maximum current densities that occur in the winding foil; and thus the losses in the connection area of the film are also reduced.
- FIG. 1 shows the end of a known band-shaped conductor foil 2 with a width B.
- the flag-like end pieces 3i all have approximately the same width b. If necessary, they can also have different widths.
- the width b of the end pieces 3i is preferably chosen so that end-side edge zones 2a and 2b of the connecting foil 2 remain free.
- the flag-like end pieces 3i can advantageously be arranged symmetrically with respect to the extended center line 5 of the connecting film 2.
- the length Li of the individual end pieces 3i can be chosen so that after folding the end ends 6i of the end pieces 3i form approximately a common end face of a stack of the current supply conductor.
- the shortest end piece 3a is the first one that is to be folded, and also the first one seen in the direction of current conduction that enables the current to pass from the current supply conductor to the connecting foil 2. According to the representation of the figure, it is to be seen as the "uppermost" end piece.
- This uppermost end piece 3a is folded upward according to FIG. 2 with an angle of 90 ° and with the formation of a folding area 11a.
- this end piece now designated 3a ', is to be at least partially insulated on its upper flat side F, on which the next flag-like end piece (3b) will later lie.
- This flat side F can be covered with an insulation film 7a.
- the insulation film can have a somewhat larger width b 'than the associated flag-like end piece 3a'; the widths b 'and b of insulation film 7a and end piece 3a' can also be the same.
- the insulation foil 7a is intended to cover at least one area 12 around the elongated lateral edge 21 of the connecting foil 2 (or around its elongated lateral longitudinal edge).
- the two side edges of the region 12 are advantageously a few centimeters away from the extended edge 21.
- the insulating film 7 advantageously extends up to the folding area 11a of the end piece 3a (inclusive) and preferably beyond it, while still covering the folding area 11b of the next end piece (3b). If necessary, the underside of the end piece 3a 'can also be provided with an insulating film, at least in its folding area 11a.
- the second flag-like end piece 3b is then folded upwards accordingly, so that the two end pieces 3a 'and 3b' together with the iso present between them lation film 7a, for example, come to lie congruently one above the other. Then insulation is again carried out according to FIG. 3.
- the flag-like end pieces 3i only have to be guided in isolation from one another up to a few centimeters outside the edge region 12 of the film winding; after that, there is no need for insulation between the end pieces and this can be continued without insulation or can be passed into a massive feed rail.
- the distribution of the total conductor current among the individual flag-like end pieces is influenced by the different length and thus by the electrical resistance of the respective end pieces and by the different axial connection positions of the end pieces on the connecting foil. These connection positions lay the different
- FIG. 7 shows such a drop in current in a diagram.
- the current I is plotted in the ordinate direction in the current supply conductor at its end on the film side and in the abscissa direction its length x at this end in arbitrary units.
- the respective extent a (3i ') of the individual flag-like end pieces 3i' is marked by the corresponding reference number of the respective end piece.
- the extent a (2) of the area of the connecting foil 2 of the undervoltage winding is entered accordingly.
- the controlled, relatively uniform current drop at the end of the power supply line can be seen from the curve. This increases current density increases in the connecting foil and consequently additional losses avoided.
- a lateral shift can take place, for example, by a subsequent material removal on the left and / or right-hand longitudinal edges of the end pieces.
- the measures according to the invention essentially relate to the configuration of a power supply line of a power transformer with a foil winding.
- Corresponding power transformers are known in principle, so that their explicit representation has been omitted in the drawings.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
- Dc-Dc Converters (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Transformers For Measuring Instruments (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4433700A DE4433700A1 (de) | 1994-09-21 | 1994-09-21 | Stromzuführungsleiter aus der Leiterfolie der Folienwicklung eines Leistungstransformators |
DE4433700 | 1994-09-21 | ||
PCT/DE1995/001230 WO1996009631A1 (de) | 1994-09-21 | 1995-09-08 | Stromzuführungsleiter aus der leiterfolie der folienwicklung eines leistungstransformators |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0782755A1 true EP0782755A1 (de) | 1997-07-09 |
EP0782755B1 EP0782755B1 (de) | 1998-05-06 |
Family
ID=6528815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95930376A Expired - Lifetime EP0782755B1 (de) | 1994-09-21 | 1995-09-08 | Stromzuführungsleiter aus der leiterfolie der folienwicklung eines leistungstransformators |
Country Status (11)
Country | Link |
---|---|
US (1) | US5805045A (de) |
EP (1) | EP0782755B1 (de) |
JP (1) | JPH10505952A (de) |
KR (1) | KR970706589A (de) |
CN (1) | CN1068954C (de) |
AT (1) | ATE165933T1 (de) |
BR (1) | BR9508980A (de) |
DE (2) | DE4433700A1 (de) |
ES (1) | ES2116762T3 (de) |
TW (1) | TW271483B (de) |
WO (1) | WO1996009631A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6535100B2 (en) * | 2000-04-14 | 2003-03-18 | Powerware Corporation | Insulated transformer foil windings with breakouts and methods for forming the same |
DE10052569A1 (de) * | 2000-10-24 | 2002-04-25 | Bosch Gmbh Robert | Folienwicklung für Drehübertrager |
US6930582B2 (en) * | 2000-11-07 | 2005-08-16 | Iota Engineering Co. | Self lead foil winding configuration for transformers and inductors |
US6642830B1 (en) * | 2000-11-07 | 2003-11-04 | Iota Engineering Co. | Self lead foil winding configuration for transformers and inductors |
DE10157590A1 (de) * | 2001-11-23 | 2003-06-05 | Abb T & D Tech Ltd | Wicklung für einen Transformator oder eine Spule |
WO2007035155A1 (en) * | 2005-09-20 | 2007-03-29 | Scandinova Systems Ab | A foil winding pulse transformer |
CN102314992A (zh) * | 2010-06-29 | 2012-01-11 | 信源电子制品(昆山)有限公司 | 空芯电感线圈 |
WO2013084609A1 (ja) * | 2011-12-07 | 2013-06-13 | Necトーキン株式会社 | コイル、リアクトル及びコイルの形成方法 |
WO2017216412A1 (en) * | 2016-06-13 | 2017-12-21 | Trafotek Oy | A busbar for a core-structure electric power engineering component with foil type windings, and a core-structure electric power engineering component with foil type windings |
US11605496B2 (en) | 2018-04-09 | 2023-03-14 | Abb Schweiz Ag | Foil wound magnetic assemblies with thermally conductive tape and methods of assembling same |
NL2032236B1 (en) * | 2022-06-21 | 2024-01-08 | Univ Eindhoven Tech | Foil winding leads and method for forming the same |
CN115331954B (zh) * | 2022-10-17 | 2023-01-24 | 广州市一变电气设备有限公司 | 变压器箔式线圈绕制出线方法、绕组及节能环保变压器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1160357A (en) * | 1909-03-03 | 1915-11-16 | Agnew Electric Welding Company | Electrical transformer. |
US2378884A (en) * | 1940-06-20 | 1945-06-19 | Thomson Gibb Electric Welding | Transformer |
DE911292C (de) * | 1947-10-03 | 1954-05-13 | Asea Ab | Hochstromwicklung fuer Transformatoren u. dgl. |
US2961747A (en) * | 1955-03-21 | 1960-11-29 | Aladdin Ind Inc | Method of making inductance coils |
SE324668B (de) * | 1968-12-20 | 1970-06-08 | Ibm Svenska Ab | |
DE1908165A1 (de) * | 1969-02-19 | 1970-10-15 | Schorch Gmbh | Bandwicklung fuer Transformatoren |
NL8702531A (nl) * | 1987-10-23 | 1989-05-16 | Philips Nv | Roterende transformator. |
US4902998A (en) * | 1988-11-21 | 1990-02-20 | Westinghouse Electric Corp. | Inductor assembly with cooled winding turns |
-
1994
- 1994-09-21 DE DE4433700A patent/DE4433700A1/de not_active Withdrawn
-
1995
- 1995-08-09 TW TW084108290A patent/TW271483B/zh active
- 1995-09-08 EP EP95930376A patent/EP0782755B1/de not_active Expired - Lifetime
- 1995-09-08 JP JP8510512A patent/JPH10505952A/ja active Pending
- 1995-09-08 ES ES95930376T patent/ES2116762T3/es not_active Expired - Lifetime
- 1995-09-08 DE DE59502126T patent/DE59502126D1/de not_active Expired - Fee Related
- 1995-09-08 US US08/809,332 patent/US5805045A/en not_active Expired - Fee Related
- 1995-09-08 CN CN95194092A patent/CN1068954C/zh not_active Expired - Fee Related
- 1995-09-08 BR BR9508980A patent/BR9508980A/pt not_active IP Right Cessation
- 1995-09-08 WO PCT/DE1995/001230 patent/WO1996009631A1/de active IP Right Grant
- 1995-09-08 KR KR1019970701726A patent/KR970706589A/ko active IP Right Grant
- 1995-09-08 AT AT95930376T patent/ATE165933T1/de not_active IP Right Cessation
Non-Patent Citations (2)
Title |
---|
ELECTRICAL EQUIPMENT, Juli 1974 Seiten 60-62, 'AL ALLOYS for foil-wound coils' * |
JOURNAL DE L'EQUIPEMENT ELECTRIQUE ET ELECTRONIQUE, Nr. 295, November 1969 Seite 123:'Les bobinages de transformateurs en feuilles d'aluminium' * |
Also Published As
Publication number | Publication date |
---|---|
CN1152970A (zh) | 1997-06-25 |
KR970706589A (ko) | 1997-11-03 |
JPH10505952A (ja) | 1998-06-09 |
DE59502126D1 (de) | 1998-06-10 |
DE4433700A1 (de) | 1996-03-28 |
US5805045A (en) | 1998-09-08 |
EP0782755B1 (de) | 1998-05-06 |
CN1068954C (zh) | 2001-07-25 |
TW271483B (en) | 1996-03-01 |
BR9508980A (pt) | 1998-01-13 |
WO1996009631A1 (de) | 1996-03-28 |
ES2116762T3 (es) | 1998-07-16 |
ATE165933T1 (de) | 1998-05-15 |
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