US3899764A - Four-strand interleaved-turn transformer winding - Google Patents

Four-strand interleaved-turn transformer winding Download PDF

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Publication number
US3899764A
US3899764A US506641A US50664174A US3899764A US 3899764 A US3899764 A US 3899764A US 506641 A US506641 A US 506641A US 50664174 A US50664174 A US 50664174A US 3899764 A US3899764 A US 3899764A
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United States
Prior art keywords
coil
winding
coil disk
disk
disks
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Expired - Lifetime
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US506641A
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English (en)
Inventor
Nice Robert I Van
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ABB Inc USA
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US506641A priority Critical patent/US3899764A/en
Priority to CA233,274A priority patent/CA1034647A/en
Application granted granted Critical
Publication of US3899764A publication Critical patent/US3899764A/en
Priority to YU02203/75A priority patent/YU220375A/xx
Priority to FR7528034A priority patent/FR2284962A1/fr
Priority to JP50111013A priority patent/JPS5156924A/ja
Assigned to ABB POWER T&D COMPANY, INC., A DE CORP. reassignment ABB POWER T&D COMPANY, INC., A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/343Preventing or reducing surge voltages; oscillations

Definitions

  • Two and three strand interleaved windings are relatively common and are being used in a variety of applications.
  • Four-strand interleaved windings seem to approach the trade-off point between impulse strength and construction costs. Although a number of fourstrand interleaved winding arrangements are known, there are particular disadvantages associated with each arrangement.
  • a four-strand interleaved winding which offers improved impulse strength over conventional windings is disclosed in British Patent Specification No. 1,099,403. This winding requires the winding of eight strands simultaneously and a large number of lead bends and splices to interconnect the strands in various coil disks.
  • US. Pat. No. 3,299,385 discloses a four-strand interleaved winding which requires the winding of only four strands simultaneously. However, in some winding applications, it is desirable to have most of the leads, which interconnect the various coil disks, located on the inside of the winding near the winding tube rather than on the outside of the winding.
  • Two additional conduction paths begin at the inner turn of the adjacent coil disk, or first coil disk from the upper coil disk, and spiral outwardly through the adjacent coil disk. These conduction paths are then transferred to the outer turn of the upper coil disk where they spiral inwardly through the upper coil disk. These conduction paths are then transferred to other coil disks in the winding and spiral therethrough in a similar manner.
  • a conductor from one of the conduction paths is positioned radially between the conductors which form otherconduction paths to provide the high series capacitance.
  • one conduction path begins at the outermost conductor location in the upper coil disk. In another embodiment, one conduction path begins at the conductor location which is radially adjacent to the outermost conductor location in the upper coil disk.
  • FIG. 1 is a view of a four-strand interleaved-turn winding constructed according to one embodiment of this invention
  • FIG. 2 is a view of a four-strand interleaved-turn winding constructed according to another embodiment of this invention.
  • the winding 10 is positioned around the insulated lowvoltage winding 12 and the magnetic core leg 14.
  • the winding 10 may be represented in various other embodiments without departing from the scope of the invention.
  • the winding 10 could be a lowvoltage winding located adjacent to a magnetic core leg rather than being a high-voltage winding.
  • the winding 10 consists of the strands or conductors 16, 18, 20 and 22 which form turns within the winding 10.
  • the turn 24 is an outer turn and the turn 26 is an inner turn.
  • the conductors which form the turns 24 the four strand simultaneously on a suitable winding tube, breaking down and rebuilding every other coil disk, and making the proper interconnections and crossovers between the coil disks.
  • Each conductor is individually insulated with conductor insulation to reduce eddy currents, such as the insulation 38 around the conductor 16.
  • the coil disks 30, 32, 34 and 36 are interconnected by the finish-finish connections 40, 42 and 44, and by the start-start connections 46, 48 and 50.
  • the interleaved pattern provided thereby can be determined by following the conduction paths which progress through the coil disks.
  • the letters A, B, C and D are used to designate the four conduction paths through the winding 10.
  • the numbers associated with the letters at the conductor locations indicate the number of turns the conductor has made around the axis 28 and, therefore, the relative voltage induced therein. This identifying technique permits rapid observation about the theoretical potential difference between various conductor locations.
  • a first path A begins at location A1 and progresses inwardly to location A2.
  • the identifying nomenclature is established assuming that the coil disks are wound with only two complete four-strand turns. It is emphasized that normally more turns would be included and that the invention is not limited to just two turns.
  • the first path then proceeds across the lead 52 of the startstart connection 46 to the location A3 and then outwardly to the location A4. After the first path proceeds across the lead 54 of the finish-finish connection 42 to the location AS, the pattern of progression of the first path in the coil disks 34 and 36 is similar to that in the coil disks 30 and 32.
  • a second conduction path C begins at location C1 and progresses inwardly to location C2.
  • the second conduction path then proceeds across the lead 56 of the start-start connection 46 to the location C3 and then outwardly to the location C4.
  • the second conduction path proceeds across the lead 58 of the finish-finish connection 42 to the location C5
  • the pattern of progression of the second path in the coil disks 34 and 36 is similar to that in the coil diks 30 and 32.
  • a third conduction path B begins at location B1 and progresses outwardly to location B2.
  • the third path then proceeds across the lead 60 of the finish-finish connection 40 to the location B3 and then inwardly to the location B4.
  • the pattern of progression of the third path in the coil disks 34 and 36 is similar to that in the coil disks 30 and 32.
  • a fourth conduction path D begins at location D1 and progresses outwardly to location D2.
  • the fourth path then pg ceeds across the lead 64 of the finishfinish connection 40 to the location D3 and then inwardly to the location D4.
  • the pattern of progression of the fourth path in the coil disks 34 and 36 is similar to that in the coil disks 30 and 32.
  • the winding 70 includes the coil disks 72, 74, 76 and 78.
  • the coil disks are disposed around the coil axis 80, the magnetic core leg 82, and the low-voltage winding 84.
  • the physical construction, and the possible variations thereof, are similar to those mentioned in-describing FIG. 1.
  • a first conduction path A begins at location Al and progresses inwardly to location A2.
  • the first path then proceeds across the lead 86 of the start-start connection 88 to the location A3 and then outwardly to the location A4.
  • the pattern of progression of the first path in the coil disks 76 and 78 is similar to that in the coil disks 72 and 74.
  • a second conduction path C begins at location C1 and progresses inwardly to location C2.
  • the second path then proceeds across the lead 94 of the start-start connection 88 to the location C3 and then outwardly to the location C4.
  • the second conduction path proceeds across the lead 96 of the finish-finish connection 92 to the location C5
  • the pattern of progression of the second path in the coil disks 76 and 78 is similar to that in the coil disks 72 and 74.
  • a third conduction path D begins at the location D1 and progresses outwardly to the location D2.
  • the third conduction path then proceeds across the lead 98 of the finish-finish connection 100 to the location D3 and then inwardly to the location D4.
  • the pattern of progression of the third path in the coil disks 76 and 78 is similar to that in the coil disks 72 and 74.
  • a fourth conduction path B begins at location B1 and progresses outwardly to location B2.
  • the fourth path then proceeds across the lead 106 of the finish-finish connection 100 to the location B3 and then inwardly to the location B4.
  • the fourth conduction path proceeds across the lead 108 of the start-start connection 104 to the location B5 in the coil disk 78, the pattern of progression of the fourth path in the coil disks 76 and 78 is similar to that in the coil disks 72 and 74.
  • interleaved windings disclosed herein exhibit high series capacitance together with large current carrying capability.
  • the number of strands which must be wound simultaneously is less than that of many prior art arrangements.
  • interleaving connections between non-adjacent coil disks are made on the inside of the winding where they can be conveniently located on the winding tube underneath the winding, thereby providing a strong and compact winding structure.
  • An interleaved winding for electrical inductive apparatus comprising:
  • each coil disk disposed axially adjacent to each other, with each coil disk containing a plurality of conductors spirally disposed around a common axis to form at least inner and outer turns of the conductors;
  • start-start and finish-finish connections located between the coil disks to provide at least first, second, third and fourth conduction paths through the coil disks, said conduction paths being directed in a first radial direction when progressing towards said axis and in a second radial direction when progressing away from said axis;
  • said first and second conduction paths beginning at the outer turn of the first coil disk and progressing in the first direction through the first coil disk and which is positioned under the inner turn of the second coil disk, said third coil disk being axially located in the winding with two coil disks between the first and third coil disks.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
US506641A 1974-09-16 1974-09-16 Four-strand interleaved-turn transformer winding Expired - Lifetime US3899764A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US506641A US3899764A (en) 1974-09-16 1974-09-16 Four-strand interleaved-turn transformer winding
CA233,274A CA1034647A (en) 1974-09-16 1975-08-11 Four-strand interleaved-turn transformer winding
YU02203/75A YU220375A (en) 1974-09-16 1975-09-01 Electric inductive apparatus having a winding with interwound windings made of multiple conductors
FR7528034A FR2284962A1 (fr) 1974-09-16 1975-09-12 Enroulement de transformateur a quatre brins et tours interfiolies
JP50111013A JPS5156924A (ja) 1974-09-16 1975-09-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US506641A US3899764A (en) 1974-09-16 1974-09-16 Four-strand interleaved-turn transformer winding

Publications (1)

Publication Number Publication Date
US3899764A true US3899764A (en) 1975-08-12

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Application Number Title Priority Date Filing Date
US506641A Expired - Lifetime US3899764A (en) 1974-09-16 1974-09-16 Four-strand interleaved-turn transformer winding

Country Status (5)

Country Link
US (1) US3899764A (ja)
JP (1) JPS5156924A (ja)
CA (1) CA1034647A (ja)
FR (1) FR2284962A1 (ja)
YU (1) YU220375A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270111A (en) * 1980-02-25 1981-05-26 Westinghouse Electric Corp. Electrical inductive apparatus
US4638270A (en) * 1984-02-17 1987-01-20 Machamer George A Resonator comprising a coil formed of multiple layer alternately arranged conductive turns

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1147282A (fr) * 1956-04-06 1957-11-21 Materiel Electrique S W Le Enroulement de bobine d'induction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1147282A (fr) * 1956-04-06 1957-11-21 Materiel Electrique S W Le Enroulement de bobine d'induction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270111A (en) * 1980-02-25 1981-05-26 Westinghouse Electric Corp. Electrical inductive apparatus
US4638270A (en) * 1984-02-17 1987-01-20 Machamer George A Resonator comprising a coil formed of multiple layer alternately arranged conductive turns

Also Published As

Publication number Publication date
FR2284962A1 (fr) 1976-04-09
FR2284962B1 (ja) 1979-06-15
YU220375A (en) 1983-04-27
CA1034647A (en) 1978-07-11
JPS5156924A (ja) 1976-05-19

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AS Assignment

Owner name: ABB POWER T&D COMPANY, INC., A DE CORP., PENNSYLV

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA.;REEL/FRAME:005368/0692

Effective date: 19891229