US3702451A - Electrical inductive apparatus - Google Patents

Electrical inductive apparatus Download PDF

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Publication number
US3702451A
US3702451A US224703A US3702451DA US3702451A US 3702451 A US3702451 A US 3702451A US 224703 A US224703 A US 224703A US 3702451D A US3702451D A US 3702451DA US 3702451 A US3702451 A US 3702451A
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United States
Prior art keywords
conductor
winding
turn
conductors
winding section
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Expired - Lifetime
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US224703A
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English (en)
Inventor
Frederick H Hofing
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/343—Preventing or reducing surge voltages; oscillations

Definitions

  • ABSTRACT [52 us. c1 ..336/70, 336/185 A "Hemmer Ming fl l wihdinfl Wound 511 1111. 15/14 with whdmm having a cross-sectional area- 58 F1610 61 Search ..336l69,70, 185, 186,187 Particularly with circular eonduetors-
  • the winding is divided into sections by a supporting member and 5 Regrences Cit each section is wound with two conductors simultaneously.
  • the two conductors are connected to each UNITED STATES PATENTS other and to the conductors of adjacent winding sec- 3,391,365 7/1968 Tipton 336/70 lions in a manner which ihereeeee the series 3,028,569 4/1962 Camilli et a1 ..336/1 85 x eapwranee of the high-voltage s- 2,918,639 12/1959 Beymer ..336/185 2,976,504 3/1961 Christoffel et al.
  • This invention relates, in general, to transformer apparatus and, more specifically, to circular conductor windings for power transformers.
  • transformer apparatus having a high-voltage winding constructed of circular conductors which exhibits high series capacitance characteristics.
  • the high-voltage winding is divided into winding sections by a supporting member which contains winding channels.
  • Each winding section comprises a plurality of conductor-turns formed by two conductors which are positioned substantially adjacent to each other throughout the winding section.
  • the conductor-turns have a sequence pattern which moves axially in one direction, then radially, and then axially in the other direction.
  • FIG. I is a p partial elevational view of a transformer constructed according to the teachings of this invention.
  • FIG. 2 is a partial elevational view of transformer winding constructed according to one embodiment of this invention.
  • FIG. 3 is a partial elevational view of a transformer winding constructed according to another embodiment of this invention.
  • FIG. 4 is a partial perspective view of a transformer winding constructed according to the teachings of this invention.
  • the winding structure 12 comprises the low-voltage winding 14 and the highvoltage winding 16.
  • the low-voltage winding 14 is disposed in inductive relationship around the magnetic core 10, with the insulated conductors 17 constructed of a suitable material, such as copper or aluminum.
  • the high-voltage winding 16 comprises a supporting member 20 which contains a plurality of winding channels, such as channels 22, 24 and 26, each of which contains a winding section, such as 28, 30 and 32, respectively.
  • Each winding section comprises a plurality of conductors 31 electrically connected in a predetennined pattern.
  • the conductors 31 have relatively small cross-sectional areas compared to typical conductors used in high voltage power transformers. Although a circular cross-sectional areas compared to typical conductors used in high-voltage power transformers. Although a circular cross-sectional shape is illustrated, the conductors may have other shapes.
  • the supporting member 20 may be constructed of a suitable electrical insulating material, such as that sold under the trade name Micarta, and may be in the fonn of substantially flat bars vertically oriented and radially spaced around the low-voltage winding 14.
  • FIG. 2 illustrates an electrical connecting arrangement according to one embodiment.
  • the winding section 28 comprises the conductors A and B. These conductors are wound at the same time around the lowvoltage winding 14 to form conductor-turns. Each conductor-tum comprises two conductors. As illustrated in FIG. 2, the winding section 28 comprises twelve conductor-turns, Al-B1 through A12-Bl2. In the winding process, the conductor turn A1431 is wound first, hence it is denoted as the start conductor-tum. The conductor turn A12-B12 is would last, hence it is denoted as the finish conductor-turn.
  • the other conductor turns are disposed in substantially random fashion between the start and finish conductor turns. Due to winding techniques, the conductor turns, as illustrated in FIG. 2, may progress axially to the end of the channel, then radially one conductor width, then axially in the other direction. However, such a winding pattern is illustrative only and any other winding pattern is within the scope of this invention.
  • the conductors A and B are substantially circular conductors constructed of a suitable material, such as copper or aluminum, and are individually insulated with a suitable insulating material, such a Nomex. It is within the contemplation of this invention that conductors A and B may have insulation wrapped around the two conductors to form a conductor pair.
  • the winding section 30, and the other winding sections, are similarly wound of similar materials.
  • the start conductor-turn C1-D1 comprises the conductors C and D.
  • the finish conductor-tum Cl2-D12 also comprises the conductors C and D.
  • conductors may be crossed-over" from an adjacent winding section.
  • conductors B and C shown in FIG. 2 may be physically the same wire strand.
  • a conductor designated by a letter and a number refers to that particular wire strand in that particular conductor-tum.
  • conductor B8 refers to the conductor-turn.
  • conductor B8 refers to the conductor wire strand B in conductor-tum 8.
  • directly and electrically connected means that the connection is made without any significant inductance therebetween.
  • Electrically connected is a broader term and may mean connected together by the way of another wound conductor.
  • Terminal 32 is one of the line terminals for the highvoltage winding 16.
  • Terminal 32 is directly and electrically connected, as represented by the line 34, to the conductor A1, which is the conductor A in the conductor-tum Al-Bl.
  • Conductor B1 is directly and electrically connected to the conductor A12, as represented by the line 36.
  • the series capacitance of the winding section is increased.
  • Conductor A] has relatively high capacitive co'upling to the conductor Bl, conductor A2 to the conductor B2, etc. Therefore, the second half of the current path of the winding section 28 substantially parallels the first half of the current path. In conventional windings of this type, a single conductor is used instead of conductor pairs, hence there is little capacitive coupling between the start and finish turns.
  • Adjacent winding sections such as the winding section 30, are wound and connected in a similar manner.
  • conductor D1 is directly and electrically connected to the conductor C12, as represented by the line 38.
  • Interconnection between the winding sections 28 and 30 is provided by a direct and electrical connection between the conductors B12 and Cl, as represented by the line 40.
  • Other winding sections throughout the high-voltage winding are similarly connected and interconnected.
  • the winding sections 28 and 30 are connected in an arrangement which increases the series capacitance of the winding 16 by physically placing the second half current path of the two sections substantially adjacent to the first half current path.
  • Terminal 32 is directly and electrically connected to the conductor A1, as represented by the line 42.
  • Conductor Al is electrically connected to conductor Bl; however, this connection is not made directly.
  • the turns formed by the conductor C are serially interconnected with the conductors A and B.
  • Conductor B1 is directly and electrically connected to the conductor C12, as represented by the line 44
  • B12 is directly and electrically connected to the conductor D1, as represented by the line 46
  • the conductor A12 is directly and electrically connected to the conductor C 1, as represented by the line 48.
  • connection arrangement represents the schematic arrangement illustrated in FIG. 2.
  • Conductor connections corresponding to the lines 36 and 38 are numbered on FIG. 4 as connections 36 and 38. They are fastened by suitable means, such as by crimping the ends together at position 50 with a suitable adaptor.
  • the winding section interconnection corresponding to the line 40 in FIG. 2 is numbered 40 in FIG. 4.
  • the interconnecting connections may be made by simply crossingover" the conductor from one winding section to the adjacent winding section.
  • Electrical inductive apparatus comprising a magnetic core, a winding structure disposed in inductive relationship with said magnetic core, said winding structure comprising a first winding, a second winding, supporting means for said second winding, said supporting means providing a plurality of winding channels, said second winding comprising a plurality of winding sections each disposed in a separate winding channel of said supporting means, each of said winding sections including first and second conductors having relatively small cross sections, said first and second conductors being positioned in said channels to form start and finish conductor-turns with said first and second conductors being located substantially adjacent to each other in the same conductor-tum, the first conductor of the start conductor-turn of one winding section being electrically connected in series circuit relationship with the second conductor of the finish conductor-turn of the same winding section, said first and second conductors forming at least two substantially axially adjacent conductor-turns in succession in each of said winding sections.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
US224703A 1972-02-09 1972-02-09 Electrical inductive apparatus Expired - Lifetime US3702451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22470372A 1972-02-09 1972-02-09

Publications (1)

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US3702451A true US3702451A (en) 1972-11-07

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Family Applications (1)

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US224703A Expired - Lifetime US3702451A (en) 1972-02-09 1972-02-09 Electrical inductive apparatus

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US (1) US3702451A (cs)
CA (1) CA972433A (cs)
FR (1) FR2171291B1 (cs)
YU (1) YU10273A (cs)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227143A (en) * 1977-11-29 1980-10-07 U.S. Philips Corporation High-voltage transformer
US4326181A (en) * 1977-11-18 1982-04-20 General Electric Company High voltage winding for dry type transformer
US4638270A (en) * 1984-02-17 1987-01-20 Machamer George A Resonator comprising a coil formed of multiple layer alternately arranged conductive turns
US4649833A (en) * 1983-06-30 1987-03-17 Cummins Peter S B Security system for safes
US20140333408A1 (en) * 2013-05-13 2014-11-13 General Electric Company Low stray-loss transformers and methods of assembling the same

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368506A (en) * 1942-05-05 1945-01-30 Gen Electric Electric apparatus and winding therefor
GB693037A (en) * 1950-02-17 1953-06-24 English Electric Co Ltd Improvements in or relating to inductive apparatus such as power transformers
US2918639A (en) * 1957-05-15 1959-12-22 Gen Electric Spacer for electrical windings
US2976504A (en) * 1955-11-22 1961-03-21 Bbc Brown Boveri & Cie Arrangement for preventing discharges along the high-voltage windings of a high-voltage transformer
US3028569A (en) * 1959-08-31 1962-04-03 Gen Electric Open core potential transformer
US3391365A (en) * 1966-11-14 1968-07-02 Westinghouse Electric Corp Interleaved winding having high series capacitance
US3543205A (en) * 1968-08-05 1970-11-24 Westinghouse Electric Corp Electrical windings
US3564470A (en) * 1969-04-16 1971-02-16 Westinghouse Electric Corp Electrical winding structures

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB734205A (en) * 1952-10-06 1955-07-27 English Electric Co Ltd Improvements in and relating to electric transformers
FR1183264A (fr) * 1956-10-03 1959-07-06 Oerlikon Maschf Enroulement protégé contre les chocs de tension, notamment pour transformateurs
FR1268876A (fr) * 1960-09-30 1961-08-04 Smit & Willem & Co Nv Enroulement de transformateur comportant plusieurs paires de bobines
FR1342866A (fr) * 1962-09-26 1963-11-15 Licentia Gmbh Disposition des couches d'enroulement dans les transformateurs de grande puissance permettant une réduction de l'isolation et une amélioration du refroidissement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368506A (en) * 1942-05-05 1945-01-30 Gen Electric Electric apparatus and winding therefor
GB693037A (en) * 1950-02-17 1953-06-24 English Electric Co Ltd Improvements in or relating to inductive apparatus such as power transformers
US2976504A (en) * 1955-11-22 1961-03-21 Bbc Brown Boveri & Cie Arrangement for preventing discharges along the high-voltage windings of a high-voltage transformer
US2918639A (en) * 1957-05-15 1959-12-22 Gen Electric Spacer for electrical windings
US3028569A (en) * 1959-08-31 1962-04-03 Gen Electric Open core potential transformer
US3391365A (en) * 1966-11-14 1968-07-02 Westinghouse Electric Corp Interleaved winding having high series capacitance
US3543205A (en) * 1968-08-05 1970-11-24 Westinghouse Electric Corp Electrical windings
US3564470A (en) * 1969-04-16 1971-02-16 Westinghouse Electric Corp Electrical winding structures

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326181A (en) * 1977-11-18 1982-04-20 General Electric Company High voltage winding for dry type transformer
US4227143A (en) * 1977-11-29 1980-10-07 U.S. Philips Corporation High-voltage transformer
US4649833A (en) * 1983-06-30 1987-03-17 Cummins Peter S B Security system for safes
US4638270A (en) * 1984-02-17 1987-01-20 Machamer George A Resonator comprising a coil formed of multiple layer alternately arranged conductive turns
US20140333408A1 (en) * 2013-05-13 2014-11-13 General Electric Company Low stray-loss transformers and methods of assembling the same
US9640315B2 (en) * 2013-05-13 2017-05-02 General Electric Company Low stray-loss transformers and methods of assembling the same
US10153085B2 (en) 2013-05-13 2018-12-11 Abb Schweiz Ag Low stray-loss transformers and methods of assembling the same

Also Published As

Publication number Publication date
YU10273A (en) 1982-06-30
FR2171291B1 (cs) 1976-06-11
FR2171291A1 (cs) 1973-09-21
CA972433A (en) 1975-08-05

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