US3928832A - Transformer winding with helically wound layers of a tape-like conductor - Google Patents

Transformer winding with helically wound layers of a tape-like conductor Download PDF

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Publication number
US3928832A
US3928832A US511304A US51130474A US3928832A US 3928832 A US3928832 A US 3928832A US 511304 A US511304 A US 511304A US 51130474 A US51130474 A US 51130474A US 3928832 A US3928832 A US 3928832A
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Prior art keywords
layer
tape
conductor
layers
winding
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Expired - Lifetime
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US511304A
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English (en)
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Svante Forsberg
Stig Larbo
Bjorn Stephensen
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ABB Norden Holding AB
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ASEA AB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—Layout of circuits
    • F02P1/083—Layout of circuits for generating sparks by opening or closing a coil circuit
    • 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
    • H01F27/323—Insulation between winding turns, between winding layers

Definitions

  • the present invention relates to a transformer winding with a tape-like conductor and with turn insulation and layer insulation applied simultaneously with the conductor. It is primarily intended to be applied in the manufacture of windings for test transformers for very high voltage such as 600 kV but relatively moderate power, such as 600 kVA.
  • such a winding is formed by simultaneously winding around a core a tape-like conductor in a series of layers each formed of a number of helical coils, the spacing of the coils being decreased from one layer to the next so that the length of the layers decreases outwardly. Insulation between the layers and'between successive turns of the helix is wound on at the same time as the tape.
  • the successive turns preferably overlap, with the amount of overlap increasing from one layer to the next.
  • the insulation between the turns may be a separate strip wound on with the conductor or may be formed by parts of the layer insulation.
  • FIG. 1 shows a cross-section through a winding according to the invention
  • FIG. 2 is a cross-section through two of the layers and illustrates the arrangement of separate turn and layer insulations
  • FIG. 3 shows a form in which the layer insulation is also included in the turn insulation
  • FIG. 4 shows in expanded view of the production of such a coil
  • FIG. 5 is a partial cross-section on the line 5-5 of FIG. 2.
  • FIG. 1 shows a cross-section of an embodiment of the winding 13 arranged around a core leg which is interleaved with upper and lower yokes 11 and 12 of a transformer core.
  • the winding is built up around a cylinder 1 of insulating material arranged around the core leg 10.
  • the winding is built up as a layer winding with a tape-like conductor 3 and insulation between each turn and each layer. These insulations will be seen more in detail in FIGS. 2 and 3.
  • the inner, low-voltage end of the winding is connected to the low-voltage terminal 2, as is seen at the left-hand bottom part of the winding.
  • the high-voltage terminal 9 is connected to a plate 14 which is connected to the end of the outermost layer of the winding.
  • the connection of terminal 9 to the plate 14 may be carried out in a way known per se, for example by welding or by screwing the terminal into a threaded socket on the plate.
  • the insulation between turns and layers thus consists of paper sheet and is wound up simultaneously with the tape-formed conductor 3. the turn insulation between successive turns of the conductor and layer insulation 5 winding.
  • Conductor strip 3 and the turn insulation 4 run between the two sections 5a and 5b of layer insulation, so that as the unit is wound on the tape will overlie a previously wound section of 5a, and will be overlaid by a succeeding section of 5b.
  • the paper foil forming the turn insulation is wound up simultaneously with the conductor foil, but the paper sheet forming the layer insulation may be wound up intermittently by applying after a certain number of turns of the conductor and turn insulating foils (such as two or three) are wound up, a turn of layer insulating paper, of full width.
  • the layer insulation nearest the metal screen consists of several layers of full width paper, that is, the insulating paper 5a forming the layer insulation of somewhat wider than the axial length of the winding.
  • the width of the insulating paper in the layer insulation 5a under the winding layer decreases and the thickness of the layer insulation is successively increased, which results in an increase of the radial dimension of the winding layer as the layer of the winding tape 3 is laid upon the layer insulation 5a.
  • the insulation between each turn of the winding consists of a separate tape 4 which is somewhat wider than the conductor tape 3 itself.
  • the conductor tape 3 is placed directly upon the insulating tape 4 and both are wound up simultaneously as one unit.
  • a second insulating paper 5b is wound up on the conductor tape layer.
  • the width of this second paper will increase by the same amount as the first insulating paper decreases, so that at each moment the sum of the width of the insulating papers above and below the conductor layer will be about the total axial length of the winding. This will be seen in FIG. 2.
  • control layers 7 are also applied at the ends of the winding for controlling the voltage along the sloping ends of the winding.
  • the control layers work as capacitive voltage control elements along the ends of the winding, and they consist of metal foils. Each such layer is in the form of an open turn of the metal foil, that is, the two ends of the turn are separated by the insulating paper, as shown diagrammatically in FIG. 5.
  • the width of the foil is preferably some times greater than the width of the conductor foil. They are manufactured by laying a foil strip at proper points on the layer insulating paper during manufacturing of the layer insulation. The length of such a strip is about equal to the circumference of the winding at the point in question.
  • an edge screen 8 consisting of a separate turn of metal tape.
  • This turn may be a turn of the winding but as an alternative it may be a separate turn, but then it may be electrically connected to the winding.
  • outer edge of the edge screens 8 and the control layers 7 lie on a straight line, which will be seen in FIG. 1.
  • the radial distance between two control layers is preferably the same as the distance between an edge screen and an adjacent control layer.
  • the control layers 7 and the edge screens 8 form a voltage grading chain along the sloping ends of the winding.
  • FIG. 3 shows a form in which the layer insulation is manufactured from full width paper a throughout. Depending on the desire regarding the thickness of the layer insulation and considering the thickness of the paper, the number of turns of the tape conductor are determined for each turn of paper in the layer insulation. FIG. 3 shows that for every fourth layer of conductor and turn insulation a paper sheet is inserted in the layer insulation and that this paper is then included in the turn insulation as well.
  • the layer insulation By using a tape-formed conductor for thewinding and by manufacturing the turn insulation as well as the layer insulation simultaneously with the conductor winding, it is possible to maintain a constant number of turns in each layer. This is achieved by decreasing the pitch of the conductor and turn insulation tape from layer to layer, so that the conductor turns will overlap each other more and more as the winding operation continues. In this way the layer will be shorter and shorter in the axial direction and the complete winding is given the double-conical configuration as seen in FIG. 1. Thus a sufficient insulating distance to ground- 4 connected parts, such as yokes, is always maintained. Also the thickness of the layer insulation can be determined freely, independent of the number of conductor turns, turn insulation and the axial length of the winding.
  • the layerinsulation is built up of varnished paper.
  • This paper which can also be used for the turn insulation, is heated before being inserted into the winding, thus binding together all the materials included in the winding as the winding is being manufactured.
  • the heating of the paper can be carried out by blowing hot air on the paper just before the paper enters the winding.
  • a transformer winding comprising a tape-like conductor wound in a succession of over-lapping helical turns forming a plurality of layers with turn insulation between the turns and layer insulation between the layers, the overlap in successive layers increasing outwardly and the axial length of the layers decreases progressively.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Insulating Of Coils (AREA)
US511304A 1973-09-28 1974-09-30 Transformer winding with helically wound layers of a tape-like conductor Expired - Lifetime US3928832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7313223A SE376508B (US06521211-20030218-C00004.png) 1973-09-28 1973-09-28

Publications (1)

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US3928832A true US3928832A (en) 1975-12-23

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US511304A Expired - Lifetime US3928832A (en) 1973-09-28 1974-09-30 Transformer winding with helically wound layers of a tape-like conductor

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US (1) US3928832A (US06521211-20030218-C00004.png)
DD (1) DD115009A5 (US06521211-20030218-C00004.png)
DE (1) DE2445019C3 (US06521211-20030218-C00004.png)
GB (1) GB1483615A (US06521211-20030218-C00004.png)
SE (1) SE376508B (US06521211-20030218-C00004.png)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4323870A (en) * 1979-08-14 1982-04-06 Asea Aktiebolag Transformer or reactor having a winding formed from sheet material
US4471336A (en) * 1983-02-10 1984-09-11 Asea Aktiebolag Inductive apparatus
US4639282A (en) * 1985-02-19 1987-01-27 Asea Aktiebolag Insulation of metallic surfaces in power transformers
US4653178A (en) * 1984-08-04 1987-03-31 Mwb Messwandler-Bau Ag Method for the manufacture of a layer winding
DE4333185A1 (de) * 1993-09-29 1995-03-30 Siemens Ag Wicklungsanordnung
US6509819B2 (en) * 1999-07-23 2003-01-21 American Superconductor Corporation Rotor assembly including superconducting magnetic coil
EP1315183A2 (de) * 2001-11-23 2003-05-28 ABB T&D Technology Ltd. Wicklung für einen Transformator oder eine Spule
EP1315182A2 (de) 2001-11-23 2003-05-28 ABB T&D Technology Ltd. Wicklung für einen Transformator oder eine Spule
US7566684B1 (en) 2006-08-24 2009-07-28 The United States Of America As Represented By The Secretary Of The Air Force Machinery windings of yttrium barium copper oxide and related coated conductor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664041A5 (de) * 1984-02-08 1988-01-29 Micafil Ag Verfahren zur lagenweisen wicklung von spulen fuer elektrische geraete.
GB2463935B (en) * 2008-10-01 2013-06-19 3Di Power Ltd Inductor for high frequency applications

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1011791A (en) * 1909-10-18 1911-12-12 Firm Robert Bosch Insulation of windings in electrical apparatus.
US1469469A (en) * 1921-08-22 1923-10-02 Igranic Electric Co Ltd Method of and means for applying the insulation of high-tension coils
US1932640A (en) * 1930-10-20 1933-10-31 Rca Corp Electrical coil
US2328443A (en) * 1941-02-18 1943-08-31 Gen Electric Multilayer electrical winding and method and apparatus for making same
US2381782A (en) * 1943-11-26 1945-08-07 Gen Electric Electrical apparatus
US3265998A (en) * 1964-04-14 1966-08-09 Charles W Park Compact high voltage transformer having more uniform equipotential line spacing
US3691498A (en) * 1971-03-24 1972-09-12 Mc Graw Edison Co Resin impregnated transformer coil assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1011791A (en) * 1909-10-18 1911-12-12 Firm Robert Bosch Insulation of windings in electrical apparatus.
US1469469A (en) * 1921-08-22 1923-10-02 Igranic Electric Co Ltd Method of and means for applying the insulation of high-tension coils
US1932640A (en) * 1930-10-20 1933-10-31 Rca Corp Electrical coil
US2328443A (en) * 1941-02-18 1943-08-31 Gen Electric Multilayer electrical winding and method and apparatus for making same
US2381782A (en) * 1943-11-26 1945-08-07 Gen Electric Electrical apparatus
US3265998A (en) * 1964-04-14 1966-08-09 Charles W Park Compact high voltage transformer having more uniform equipotential line spacing
US3691498A (en) * 1971-03-24 1972-09-12 Mc Graw Edison Co Resin impregnated transformer coil assembly

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471335A (en) * 1979-08-14 1984-09-11 Asea Ab Transformer or reactor having a winding formed from sheet material
US4323870A (en) * 1979-08-14 1982-04-06 Asea Aktiebolag Transformer or reactor having a winding formed from sheet material
US4471336A (en) * 1983-02-10 1984-09-11 Asea Aktiebolag Inductive apparatus
US4653178A (en) * 1984-08-04 1987-03-31 Mwb Messwandler-Bau Ag Method for the manufacture of a layer winding
US4733213A (en) * 1984-08-04 1988-03-22 Mwb Messwandler-Bau Aktiengesellschaft Layer winding for electrical equipment
US4639282A (en) * 1985-02-19 1987-01-27 Asea Aktiebolag Insulation of metallic surfaces in power transformers
DE4333185A1 (de) * 1993-09-29 1995-03-30 Siemens Ag Wicklungsanordnung
AU763545B2 (en) * 1999-07-23 2003-07-24 American Superconductor Corporation Superconducting magnetic coil
US6509819B2 (en) * 1999-07-23 2003-01-21 American Superconductor Corporation Rotor assembly including superconducting magnetic coil
EP1315183A2 (de) * 2001-11-23 2003-05-28 ABB T&D Technology Ltd. Wicklung für einen Transformator oder eine Spule
EP1315182A2 (de) 2001-11-23 2003-05-28 ABB T&D Technology Ltd. Wicklung für einen Transformator oder eine Spule
US20030156004A1 (en) * 2001-11-23 2003-08-21 Benjamin Weber Winding for a transformer or a coil and method for winding
EP1315183A3 (de) * 2001-11-23 2004-12-01 ABB T&D Technology Ltd. Wicklung für einen Transformator oder eine Spule
EP1315182A3 (de) * 2001-11-23 2004-12-01 ABB T&D Technology Ltd. Wicklung für einen Transformator oder eine Spule
US7064644B2 (en) 2001-11-23 2006-06-20 Abb T & D Technologies Ltd. Winding for a transformer or a coil and method for winding
KR100981380B1 (ko) * 2001-11-23 2010-09-10 에이비비 티앤드디 테크놀로지즈 리미티드 변압기 또는 코일을 위한 권선
KR100981379B1 (ko) * 2001-11-23 2010-09-10 에이비비 티앤드디 테크놀로지즈 리미티드 변압기 또는 코일을 위한 와인딩
US7566684B1 (en) 2006-08-24 2009-07-28 The United States Of America As Represented By The Secretary Of The Air Force Machinery windings of yttrium barium copper oxide and related coated conductor

Also Published As

Publication number Publication date
DD115009A5 (US06521211-20030218-C00004.png) 1975-09-05
DE2445019B2 (de) 1978-08-31
DE2445019A1 (de) 1975-04-03
SE7313223L (US06521211-20030218-C00004.png) 1975-04-01
DE2445019C3 (de) 1979-04-26
GB1483615A (en) 1977-08-24
SE376508B (US06521211-20030218-C00004.png) 1975-05-26

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