WO1999049481A1 - Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine - Google Patents

Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine Download PDF

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Publication number
WO1999049481A1
WO1999049481A1 PCT/US1998/006131 US9806131W WO9949481A1 WO 1999049481 A1 WO1999049481 A1 WO 1999049481A1 US 9806131 W US9806131 W US 9806131W WO 9949481 A1 WO9949481 A1 WO 9949481A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
recited
power distribution
dry
distribution transformer
Prior art date
Application number
PCT/US1998/006131
Other languages
English (en)
Inventor
David M. Nathasingh
D. Christian Pruess
Original Assignee
Alliedsignal Inc.
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 Alliedsignal Inc. filed Critical Alliedsignal Inc.
Priority to JP2000538364A priority Critical patent/JP2002508585A/ja
Priority to EP98913227A priority patent/EP1074028A1/fr
Priority to PCT/US1998/006131 priority patent/WO1999049481A1/fr
Priority to CNB988140500A priority patent/CN1241215C/zh
Priority to AU67829/98A priority patent/AU6782998A/en
Priority to BR9815771-0A priority patent/BR9815771A/pt
Priority to KR1020007010762A priority patent/KR100549558B1/ko
Priority to CA002326328A priority patent/CA2326328A1/fr
Publication of WO1999049481A1 publication Critical patent/WO1999049481A1/fr

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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
    • H01F27/24—Magnetic cores
    • H01F27/25—Magnetic cores made from strips or ribbons
    • 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
    • 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
    • H01F2027/2857—Coil formed from wound foil conductor

Definitions

  • the present invention relates to transformers; and more particularly, to a dry- type power distribution transformer having a wound ferromagnetic metal core and a generally rectangular resin encapsulated coil.
  • Conventional dry-type power distribution transformers have a round or toroidal open wound coil and a silicon steel or amorphous metal core of the wound or stacked variety.
  • the transformer core typically has a rectangular shape defining a rectangular window within which the coil is located.
  • the toroidal shape of the coil creates a mismatch between the core and coil insofar as the core window is concerned, i.e. the shape of the rectangular window does not match the shape of the section of the coil that is located therein.
  • This mismatch between the core and coil causes the size and cost of the transformer to be significantly larger than would be required if the transformer had more closely matched core and coil shapes.
  • Wound cores used in power distribution transformers are rectangular in cross-section and do not conform to the round shape of the coil.
  • Stacked silicon steel transformer cores may have a cruciform cross-section that can approximately match the coil ' s toroidal shape. Due to the high expense of casting or cutting an amorphous metal strip to a variety of widths, it is impractical to form a stacked amorphous metal core with a cruciform cross-section. For these reasons, in manufacture of dry-type power distribution transformers having ferromagnetic metal cores, whether wound or stacked, the cross-sectional shape of the core (i.e. rectangular) and the shape of the coil (i.e. round) do not match. Usage of coil material is uneconomical, and transformer sizes are too large.
  • Power distribution transformers may be installed in a variety of locations and subject to extreme environmental conditions such as. for example, particulate matter (dust. dirt. etc.). moisture, caustic substances, and the like, which adversely effect the life span and performance of the transformer. Open wound coils provide no protection against the effects of such the harsh environments.
  • the present invention provides a dry-type power distribution transformer having a wound ferromagnetic metal core and a generally rectangular, resin encapsulated coil.
  • the core has a generally rectangular cross-sectional shape that closely matches the generally rectangular shape of the resin encapsulated coil.
  • a dry-type ferromagnetic metal power distribution transformer that is less expensive to manufacture, less resistive and less lossy, in that less coil material is needed to wind the coil, and more compact than transformers having generally round or circular coils.
  • the dry-type dry- power distribution transformer includes a resin encapsulated generally rectangular coil having a substantially straight section and a ferromagnetic metal core, composed of amorphous metal or silicon steel, having a generally rectangular core window defined therein.
  • the coil and the core are sized and shaped such that the shape of the substantially straight section of the coil substantially conforms to the shape of the core window.
  • the substantially straight section of said coil is located within the core window.
  • the resin encapsulation protects the coil against harsh environmental conditions, protects the insulation system of the coil, improves the coil strength under short-circuit conditions, and improves the coil ' s cooling characteristics by providing a smooth, uniform surface about the coil ' s exterior over which air (either forced or convective) may smoothly and easily pass.
  • the dry-type power distribution transformer of the invention is durable and robust. Coil and core materials are utilized in a highly economical manner that significantly decrease manufacturing cost and transformer size. These features are especially desirable in power distribution transformers where size. cost, and performance govern market acceptance.
  • Fig. 1A is a frontal view of a shell-type single phase transformer constructed in accordance with the present invention with the coil partially cut-away:
  • Fig. I B is a cross-sectional view taken along line B-B of Fig. 1 A:
  • Fig. 2A is a frontal view of a core-type single phase transformer constructed in accordance with the present invention.
  • Fig. 2B is a cross-sectional view taken along line B-B of Fig. 2A;
  • Fig. 3A is a frontal view of a three phase transformer constructed in accordance with the present invention.
  • Fig. 3B is a cross-sectional view taken along line B-B of Fig. 3A:
  • Fig. 4 is a perspective view of a generally rectangular, low voltage coil wound about a rectangular mandrel in accordance with the present invention
  • Fig. 5 is a perspective view of a generally rectangular, high voltage coil wound about a rectangular mandrel in accordance with the present invention
  • Fig. 6 is a perspective view of an epoxy containment vessel configured for encapsulating a generally rectangular coil in accordance with the present invention
  • Fig. 7 is a top view of the epoxy containment vessel of Fig. 6 with a generally rectangular coil contained therein:
  • Fig. 8 is a block diagram of an encapsulation system for encapsulating a coil constructed in accordance with the present invention.
  • a shell-type single phase power distribution transformer (Fig. 1A); and a core-type single phase power distribution transformer (Fig. 2A).
  • Shell-type single phase transformer comprises a generally rectangular, resin encapsulated coil 40 and two ferromagnetic metal cores 20.
  • Core- type single phase transformer 10 comprises two generally rectangular, resin encapsulated coils 40 and a single ferromagnetic metal core 20.
  • a second embodiment of the invention is depicted in Fig. 3A. In that embodiment shell-type three-phase power distribution transformer 10 comprises three generally rectangular, resin encapsulated coils 40 and four ferromagnetic metal cores 20.
  • the ferromagnetic metal of which core 20 is composed is formed either from silicon steel or an amorphous metal.
  • amorphous metal means a metallic alloy that substantially lacks any long range order and is characterized by X-ray diffraction intensity maxima which are qualitatively similar to those observed for liquids or inorganic oxide glasses.
  • Amorphous metal alloys are well suited for use in forming cores 20. because they have the following combination of properties: (a) low hysteresis loss: (b) low eddy current loss; (c) low coercive force; (d) high magnetic permeability: (e) high saturation value; and (f) minimum change in permeability with temperature.
  • Such alloys are at least about 50% amorphous, as determined by x-ray diffraction.
  • Preferred amorphous metal alloys include those having the formula M 60.90 T 0 ., 5 X l 0 _ 25 , wherein M is at least one of the elements iron, cobalt and nickel, T is at least one of the transition metal elements, and X is at least one of the metalloid elements of phosphorus, boron and carbon. Up to 80 percent of the carbon, phosphorus and/or boron in X may be replaced by aluminum, antimony, beryllium, germanium, indium, silicon and tin.
  • amorphous metal alloys Used as cores of magnetic devices, such amorphous metal alloys evidence generally superior properties as compared to the conventional polycrystalline metal alloys commonly utilized.
  • strips of such amorphous alloys are at least 80% amorphous, more preferably yet. at least 95% amorphous.
  • the amorphous alloys of cores 20 are preferably formed by cooling a melt at a rate of about 10 6 °C/sec.
  • a variety of well-known techniques are available for fabricating rapidly-quenched continuous amorphous metal strip.
  • the strip material of cores 20 When used in magnetic cores for amorphous metal transformers, the strip material of cores 20 typically has the form of a ribbon. This strip material is conveniently prepared by casting molten material directly onto a chill surface or into a quenching medium of some sort. Such processing techniques considerably reduce the cost of fabrication, since no intermediate wire-drawing or ribbon-forming procedures are required.
  • the amorphous metal alloys of which core 20 is preferably composed evidence high tensile strength, typically about 200,000 to 600,000 psi, depending on the particular composition. This is to be compared with polycrystalline alloys, which are used in the annealed condition and which usually range from about 40.000 to 80.000 psi.
  • a high tensile strength is an important consideration in applications where high centrifugal forces are present, since higher strength alloys prolong the service life of the transformer.
  • the amorphous metal alloys used to form core 20 evidence a high electrical resistivity, ranging from about 160 to 180 microhm-cm at 25 °C. depending on the particular composition. Typical prior art materials have resistivities of about 45 to 160 microhm-cm.
  • the high resistivity possessed by the amorphous metal alloys defined above is useful in AC applications for minimizing eddy current losses which, in turn, are a factor in reducing core loss.
  • a further advantage of using amorphous metal alloys to form core 20 is that lower coercive forces are obtained than with prior art compositions of substantially the same metallic content, thereby permitting more iron, which is relatively inexpensive, to be utilized in the core 20, as compared with a greater proportion of nickel, which is more expensive.
  • Each of the cores 20 is formed by winding successive turns onto a mandrel
  • the strip material of cores 20 is preferably in the range of 1 to 2 mils. Due to the relatively high tensile strength of the amorphous metal alloy preferred for use herein, strip material having a thickness of 1 -2 mils can be used without fear of breakage. It will be appreciated that keeping the strip material relatively thin increases the effective resistivity since there are many boundaries per unit of radial length which eddy currents must pass through.
  • a shell-type single phase, dry- type power distribution transformer 10 includes a core/coil assembly 12 comprised of two ferromagnetic metal cores 20 and an encapsulated, generally rectangular coil 40.
  • Transformer 10 also includes a bottom frame 30 and top frame 34, having bottom and top coil supports 32, 36, respectively, and within which the core/coil assembly 12 is supportedly mounted.
  • Each core 20 is preferably wound from a plurality of ferromagnetic metal strips or layers 28 having a generally rectangular cross-sectional shape (see Fig. I B).
  • Each core 20 has two long sides 24 and two short sides 26 that collectively define a generally rectangular core window 22 within which a substantially straight mid-section 52 of the generally rectangular coil 40 of the present invention is located.
  • the aspect ratio i.e. the relationship between the long and short sides 24, 26 of the core 20. is defined herein as the ratio of the window height ( i.e. long side 24) to window width (i.e. short side 26) and is preferably between approximately 3.5 to 1 and 4.5 to 1.
  • This preferred core construction ⁇ minimizes the number of wound strips or layers 28 of ferromagnetic metal required to construct the core 20 which, in turn, yields lower temperature gradients in the coil 40.
  • Layers of epoxy (not shown) are applied along the long sides 24 to support the height of the core 20.
  • the initial epoxy layer is preferably generally compliant and penetrates between the ferromagnetic metal strips or layers 28 that comprise the core 20.
  • Core 20 is preferably constructed from ferromagnetic metal ribbon having a nominal chemistry Fe 80 B, . Si 9 , which ribbon is sold by AlliedSignal Inc. under the trade designation METGLAS 8 alloy SA- 1.
  • the desired shape of the coil 40 of the present invention is generally rectangular. However, other geometric shapes are also considered within the scope of the present invention, provided, however, that such other geometric shapes include a substantially straight mid-section 52 that is sized and shaped to fit within the generally rectangular window 22 of the core 20.
  • the coil 40 may have rounded end sections 54 that are not located within the core window 22, and a generally straight mid-section 52 that passes through and is located within the core window, e.g. an oval with generally straight mid-sections.
  • the generally rectangular coil 40 of the present invention comprises a plurality of coil windings 42 wound along with an insulating material 44 and with selectively placed cooling duct spacers 46 (see Figs. 4 and 5).
  • the generally rectangular shape of the coil 40 is obtained by winding the coil components (e.g. windings 42 and insulation material 44) about a rectangular winding mandrel 60 (see Figs. 4 and 5), alternatingly winding coil windings 42 and insulating material 44 in a plurality of concentric layers.
  • insulating material 44 comprises the inner- and outer-most layers of the wound coil 40 and further provides electrical insulation between adjacently wound coil windings 42.
  • a substantially rectangular coil channel 56 is defined longitudinally through the coil 40 upon removal of the rectangular winding mandrel 60.
  • the coil winding material is typically supplied on a spool, the material may retain a bend radius after the coil 40 is wound, causing the coil 40 to bow or assume a generally oval shape due to the memory of the winding material.
  • This disadvantageous ⁇ increases the build dimension of the coil, especially in the mid-
  • coil windings 42 (and the coil 40) retains its generally rectangular shape after it is removed from the winding mandrel 60.
  • One solution provided by the present invention involves using epoxy-dotted kraft paper as the insulating material 44 between the coil windings 42. The epoxy adheres to the coil windings 42 and, upon curing, imparts rigidity to the windings 42 that counteracts the bowing tendency of the winding material.
  • a winding form 62 may include metal corners 64 that form corners in the coil windings 42 and the coil 40 is wound on the mandrel 60.
  • a third solution involves shaping the generally rectangular form of the coil 40 as the winding material is wound on the mandrel 60 such as. for example, using a wooden block and nylon hammer. Still another solution involves leaving the coil 40 on the winding mandrel 60 and pressing the long legs of the winding 40 between clamps after the coil 40 has been completely wound and prior to encapsulation. In addition to providing the generally rectangular form to the coil 40, this latter solution serves to further compress the long legs of the coil 40 thereby minimizing build-up among the windings 42 and insulating material 44 in the sections where build-up should be minimized, i.e. the substantially straight mid-sections 52.
  • the cooling duct spacers 46 are not placed (and the cooling ducts 58are not located) in the substantially straight mid-sections 52 of the coil. This provides a distinct advantage over round or toroidal coils that require circumferentially continuous cooling ducts.
  • a circumferentially discontinuous cooling duct which is defined by the selective placement of the spacers 46, is provided only in the end sections 54 of the substantially rectangular coil 40.
  • the insulating material 44 is interspersed between adjacent layers of coil windings 42 to provide electric isolation therebetween and forms the inner- and outer-most layers of the coil 40 (not considering the epoxy encapsulation described below).
  • the insulating material 44 comprises a sheet or sheets of aramid paper such as Dupont ' s Nomex® brand. It will be obvious to those skilled in the art that various other insulating materials may be provided without departing from the spirit or intent of the present invention.
  • the inner-most and outer-most sheets of insulating material 44 are preferably sized so as to extend approximately 12 mm beyond the longitudinal ends of the coil 40.
  • the insulating material 44 located on each side of the cooling duct spacers 46 also extends approximately 12 mm past the ends of the coil 40.
  • These sheets of extended insulation material 44 are sealed with a thick epoxy such as. for example, that made by Magnolia Co., part number 3126, A/B.
  • the epoxied extended sheets of insulation material 44 then serve to contain any uncured epoxy during the encapsulation process (described in more detail below) of the coil 40.
  • Cooling for dry-type power distribution transformers may be either convective or forced-air. Cooling ducts 58 are thus necessary between the coil windings to permit the passage of air therethrough.
  • the cooling duct spacers 46 may be inserted between coil windings 42 as the coil 40 is wound and are removed after the coil 40 has been encapsulated (as described in further detail below). Since it is desirable to control the wound dimensions of the coil 40 to ensure that it will fit within the core window 22 of the core 20, the cooling duct spacers 46 are advantageously inserted only in those sections of the coil 40 that will not be located within the core window 22 (i.e. at the longitudinally distal ends of the coil 40, as clearly shown in Fig. I B) in the assembled transformer 10.
  • the dimension of the coil 40 is controlled in the section that will be located within the core window 22 thereby providing smaller (i.e. narrower) coils 40 that, in turn, produce smaller power distribution transformers.
  • the generally rectangular shape of the coil of the present invention permits the use of cooling ducts 58 that are non-continuous about the circumference of the rectangular coil. The desirability of selectively locating the cooling ducts 58 and of providing circumferentially non-continuous cooling ducts 58 is clear considering the fact that the cooling ducts 58 increase the size of the coil — which is undesirable especially in the substantially straight mid-section 52 of the coil 40.
  • the generally rectangular shape of the coil 40 of the present invention provides four clearly delineated sides (which round or toroidal coils do not) which permit selective location of the cooling ducts 58 in the end sections 54 of the coil 40.
  • the coil winding 42 comprises a sheet or sheets of aluminum or copper (see Fig. 4).
  • the coil winding 42 comprises a cross-sectionally rectangular or circular copper wire (see Fig. 5).
  • the coil 40 is wound on a rectangular mandrel 60.
  • the substantially rectangular coil 40 of the present invention may comprise only a low voltage or a high voltage coil or, alternatively, it may comprise both low and high voltage coils.
  • the wound coil 40 is completely contained in and encapsulated by an epoxy resin layer 50. as described in more detail below.
  • Figs. 4 and 5 there is shown a generally rectangular coil 40 configured in accordance with the present invention for low voltage and high voltage applications, respectively.
  • the low voltage coil 40 shown in Fig. 4 is formed by winding a coil winding 42 such as, for example, a sheet of copper or aluminum, about a generally rectangular winding mandrel 60.
  • an insulating material 44 is interspersed therebetween.
  • the insulating material 44 comprises the inner- and outer-most layers of the wound coil 40.
  • Cooling ducts 58 are provided in the wound coil 40 by inserting cooling duct spacers 46 between the coil windings 42 as the coil 40 is wound. The spacers 46 are removed after the coil 40 is encapsulated and the cooling ducts 58 are thus defined by the cavity created by the removed spacer 46.
  • the high voltage coil 40 depicted in Fig. 5 is formed in a manner similar to that of the low voltage coil 40 of Fig. 4, except that the coil winding 42 comprises a rectangular or round copper wire that is spiral or disk wound about the rectangular mandrel 60.
  • the coil 40 of the present invention is encapsulated in an epoxy resin layer 50 using a containment vessel 70 as depicted in Fig. 6.
  • the vessel 70 comprises a vessel shell 72 having first and second halves 72a. 72b. a vessel core 74, and a vessel bottom 76.
  • the vessel core 74 may also comprise first and second halves 74a. 74b. or, alternatively, the vessel core 74 may comprise the rectangular winding mandrel 60 upon which the generally rectangular coil 40 of the present invention is wound and formed.
  • Brackets 78 provided on the first and second vessel halves 72a. 72b may be used to hold the two halves together during the encapsulation process.
  • the encapsulation process will now be discussed in detail and with reference to Figs. 6. 7 and 8.
  • the wound coil 40 is placed in the containment vessel 70 which preferably extends beyond the top of the coil 40 by approximately 100 mm to allow for any shrinkage in the epoxy after curing.
  • the vessel 70 and coil 40 are then loaded into a vacuum chamber 80 that is connected to a vacuum source 82 and an epoxy source 84.
  • the chamber 80 is then evacuated by the vacuum source 82 to approximately 150 torr.
  • a low viscosity epoxy such as a bisphenol A epoxy resin of the type sold by Magnolia Co. as part number 1 1 1-047, A/B, is introduced into and completely fills the containment vessel 70.
  • the vacuum chamber 80 is further evacuated to approximately 20 torr.
  • the generally rectangular, resin encapsulated coil 40 may now be used together with a wound ferromagnetic metal core 20 having a generally rectangular cross-section and a generally rectangular core window 22.
  • the substantially straight section 52 of the coil 40 is located within the core window 22 and substantially matches the size and shape of the window 22.
  • the present invention provides a dry-type power distribution transformer having a wound ferromagnetic metal core having a generally rectangular cross- sectional shape and a generally rectangular resin encapsulated coil.
  • the encapsulation protects the coil against harsh environmental conditions, protects the insulation system of the coil, improves the coil strength under short-circuit conditions, and improves the coifs cooling characteristics by providing a smooth, uniform surface about the coil's exterior over which air (either forced or convective) may smoothly and easily pass.
  • the present invention provides a dry-type ferromagnetic metal power distribution transformer that is less expensive to manufacture, is less resistive and thus less lossy (less coil material is needed to wind the coil), and that is more compact than prior art transformers having generally round or circular coils.
  • the present invention thus provides a durable and robust dry-type power distribution transformer that uses the transformer materials in a more economical manner thereby reducing manufacturing costs and overall transformer size.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un transformateur (10) sec de distribution d'énergie présentant généralement un noyau métallique ferromagnétique (20) enroulé et une bobine (40) généralement rectangulaire encapsulée dans une résine. Le noyau présente une fenêtre (22) de noyau généralement rectangulaire dans laquelle est placée une section droite de la bobine. Lorsqu'elle est assemblée pour former un transformateur de distribution d'énergie, la forme de la section sensiblement droite de la bobine épouse la forme de la fenêtre de noyau. Le transformateur est de fabrication bon marché, est doué d'une faible résistivité et d'une faible perte dans le fer, il est léger, compact et présente un fonctionnement fiable.
PCT/US1998/006131 1998-03-27 1998-03-27 Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine WO1999049481A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2000538364A JP2002508585A (ja) 1998-03-27 1998-03-27 略矩形の樹脂包囲コイルを有する乾式変圧器
EP98913227A EP1074028A1 (fr) 1998-03-27 1998-03-27 Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine
PCT/US1998/006131 WO1999049481A1 (fr) 1998-03-27 1998-03-27 Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine
CNB988140500A CN1241215C (zh) 1998-03-27 1998-03-27 矩形的树脂封装的绕组和干式配电变压器
AU67829/98A AU6782998A (en) 1998-03-27 1998-03-27 Dry-type transformer having a generally rectangular, resin encapsulated coil
BR9815771-0A BR9815771A (pt) 1998-03-27 1998-03-27 Transformador do tipo seco apresentando uma bobina substanciamente retangular com resina embutida e processo de sua fabricação
KR1020007010762A KR100549558B1 (ko) 1998-03-27 1998-03-27 거의 직사각형이며, 레진이 피복된 코일을 갖는 건식 변압기
CA002326328A CA2326328A1 (fr) 1998-03-27 1998-03-27 Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1998/006131 WO1999049481A1 (fr) 1998-03-27 1998-03-27 Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine

Publications (1)

Publication Number Publication Date
WO1999049481A1 true WO1999049481A1 (fr) 1999-09-30

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Application Number Title Priority Date Filing Date
PCT/US1998/006131 WO1999049481A1 (fr) 1998-03-27 1998-03-27 Transformateur sec presentant une bobine generalement rectangulaire encapsulee dans une resine

Country Status (8)

Country Link
EP (1) EP1074028A1 (fr)
JP (1) JP2002508585A (fr)
KR (1) KR100549558B1 (fr)
CN (1) CN1241215C (fr)
AU (1) AU6782998A (fr)
BR (1) BR9815771A (fr)
CA (1) CA2326328A1 (fr)
WO (1) WO1999049481A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018049520A1 (fr) * 2016-09-16 2018-03-22 Energo Group Canada Inc. Réduction de pertes pour distribution d'énergie électrique
US10205318B2 (en) 2016-01-05 2019-02-12 Energo Group Canada Inc. Method and system for reducing losses during electrical power distribution

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411188B1 (en) * 1998-03-27 2002-06-25 Honeywell International Inc. Amorphous metal transformer having a generally rectangular coil
JP2014161216A (ja) * 2009-05-25 2014-09-04 Hitachi Industrial Equipment Systems Co Ltd パワーコンディショナ
CN103163185B (zh) * 2013-03-05 2014-12-31 江西省电力科学研究院 配电变压器线圈材质无损检测方法
CN109215950B (zh) * 2018-11-06 2021-03-12 江西北斗变电科技有限公司 一种提高变压器抗短路能力的支撑结构及实现方法
CN111768960B (zh) 2019-04-01 2022-02-18 台达电子企业管理（上海）有限公司 灌封盒以及变压器
CN111768959B (zh) 2019-04-01 2022-03-08 台达电子企业管理（上海）有限公司 变压器
CN111768947B (zh) 2019-04-01 2023-03-24 台达电子企业管理（上海）有限公司 变压器及其制造方法
KR102152956B1 (ko) * 2020-05-04 2020-09-07 제룡전기 주식회사 절연유를 사용하지 않는 주상변압기 제조방법 및 이를 이용하여 제조된 주상변압기

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626587A (en) * 1970-04-06 1971-12-14 Westinghouse Electric Corp Methods of constructing electrical transformers
EP0082954A1 (fr) * 1981-12-28 1983-07-06 Allied Corporation Dispositif électromagnétique à noyau annulaire
JPS59121810A (ja) * 1982-12-28 1984-07-14 Toshiba Corp 箔巻変圧器
US4504813A (en) * 1982-12-03 1985-03-12 Mcgraw-Edison Company Energy saving wound core transformer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523169A (en) * 1983-07-11 1985-06-11 General Electric Company Dry type transformer having improved ducting
JPH05326293A (ja) * 1992-05-21 1993-12-10 Toshiba Corp ガス絶縁変圧器
JPH06176940A (ja) * 1992-12-10 1994-06-24 Toshiba Corp 樹脂モールドコイル
US5359314A (en) * 1993-07-01 1994-10-25 General Electric Company Core and coil assembly for an amorphous-steel cored electric transformer
JP3458119B2 (ja) * 1993-10-01 2003-10-20 株式会社ダイヘン 巻鉄心変圧器
JP3462935B2 (ja) * 1995-05-31 2003-11-05 愛知電機株式会社 油入アモルファス鉄心変圧器
KR100452535B1 (ko) * 1996-01-11 2004-12-17 메트글라스, 인코포레이티드 분포갭전기초크
AU6934196A (en) * 1996-09-04 1998-03-26 E.I. Du Pont De Nemours And Company High voltage/low voltage transformer with thermoplastic air-core insulation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626587A (en) * 1970-04-06 1971-12-14 Westinghouse Electric Corp Methods of constructing electrical transformers
EP0082954A1 (fr) * 1981-12-28 1983-07-06 Allied Corporation Dispositif électromagnétique à noyau annulaire
US4504813A (en) * 1982-12-03 1985-03-12 Mcgraw-Edison Company Energy saving wound core transformer
JPS59121810A (ja) * 1982-12-28 1984-07-14 Toshiba Corp 箔巻変圧器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 243 (E - 277) 8 November 1984 (1984-11-08) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10205318B2 (en) 2016-01-05 2019-02-12 Energo Group Canada Inc. Method and system for reducing losses during electrical power distribution
WO2018049520A1 (fr) * 2016-09-16 2018-03-22 Energo Group Canada Inc. Réduction de pertes pour distribution d'énergie électrique
US10650954B2 (en) 2016-09-16 2020-05-12 Energo Group Canada Inc. Losses reduction for electrical power distribution

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CA2326328A1 (fr) 1999-09-30
BR9815771A (pt) 2004-04-13
CN1241215C (zh) 2006-02-08
CN1292925A (zh) 2001-04-25
KR20010042234A (ko) 2001-05-25
JP2002508585A (ja) 2002-03-19
EP1074028A1 (fr) 2001-02-07
AU6782998A (en) 1999-10-18
KR100549558B1 (ko) 2006-02-08

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