EP0096058A1 - Electric transformer and method for making it. - Google Patents
Electric transformer and method for making it.Info
- Publication number
- EP0096058A1 EP0096058A1 EP82903586A EP82903586A EP0096058A1 EP 0096058 A1 EP0096058 A1 EP 0096058A1 EP 82903586 A EP82903586 A EP 82903586A EP 82903586 A EP82903586 A EP 82903586A EP 0096058 A1 EP0096058 A1 EP 0096058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- carcass
- transformer
- carcasses
- magnetic
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 238000004804 winding Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000696 magnetic material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000123 paper Substances 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 210000002105 tongue Anatomy 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000005300 metallic glass Substances 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
- Y10T29/49078—Laminated
Definitions
- the present invention relates to an electrical transformer intended in particular but not limited to so-called “average” powers, that is to say ranging from 5 to 1000 kVA approximately, and for single-phase or polyphase circuits.
- the present invention also relates to a process for the manufacture of this transformer.
- Known transformers very generally include a magnetic sheet metal circuit having certain zones surrounded by a high voltage electric winding and / or a low voltage winding.
- the adjectives "high” and “low” have only a relative meaning here to designate the circuits connected to the terminals of the device between which the voltage is respectively the highest and the lowest.
- the efficiency of a transformer is all the better when the windows of the electrical circuits are completely occupied by the magnetic circuit.
- the gap that the state of the art requires to provide between magnetic circuit and electrical circuits plays a detrimental role in this regard. It is also harmful with regard to the weight and size of the device.
- this interval i oli ⁇ ue to fix the electric and magnetic circuits independently of each other which is all the more difficult as the fixings must resist the abrupt and violent efforts which can result from the appearance of a short circuit in the network served by the transformer.
- the object of the invention is to remedy these drawbacks by proposing a transformer which is easy to manufacture and which provides improved efficiency despite a reduced bulk.
- the electrical transformer comprising a magnetic circuit, as well as for each phase, a high voltage electrical circuit and a low voltage electrical circuit both wound around at least one section of the magnetic circuit, is characterized in that the electrical circuits are arranged in at least one electrically insulating annular carcass which, in service, is interposed between. these electrical circuits and the aforementioned section of the magnetic circuit.
- the shell provides perfect insulation between the electrical and magnetic circuits without the need to provide insulating paper or a gap between these circuits.
- the presence of the carcass considerably facilitates the winding of the electrical circuits, and also the production of the magnetic circuit which can form with the carcass a practically rigid interlocking whereas, according to the state of the art, any mutual support of the magnetic and electrical circuits had to be avoided at the risk of damaging the insulation of the electrical circuits.
- the shell can easily be fixed soli ⁇ dly to any piece of frame such as a tank covering the transformer.
- the efficiency of the transformer produced is excellent because the section of the magnetic circuit can almost entirely fill the window of the electrical circuit.
- the size of the device is very small because the electrical circuit can almost entirely fill the window of the magnetic circuit.
- the magnetic circuit has at least one window passed through. by two carcasses surrounding two sections of magnetic circuit which are opposite relative to this window, each carcass having a profile substantially coinciding with the half-profile of the window considered of the magnetic circuit.
- the two carcasses together form around the electrical circuits an insulating sheath which completely separates them from the magnetic circuit.
- the method for manufacturing a transformer of the kind set out above is characterized in that the electrical circuits are wound in the carcass, and in that 1 thereafter, to produce the magnetic circuit is wound at least one suitable magnetic material strip ⁇ slit around a portion of the carcass, the latter serving as a guide for the winding of the strip.
- FIG. 1 is a side elevational view 0 of a three-phase transformer according to
- FIG. 1 is a top view of the transformer of Figure 1;
- FIG. 4 is a more detailed top view of the transformer, the cover of the tank being
- FIG. 5 is a bottom view of the transformer, the bottom of the tank being assumed to be removed;
- FIG. 6 is a sectional view along ' the plane VI-VI of Figure 4, the two rings
- FIG. 7 is a schematic view of a carcass before assembly
- FIG. 8 is a sectional view of setonleplan 3o v ⁇ i-VLTI delafigure 9 of a carcass with its c ⁇ ⁇ u- ⁇ s e_ect ques • ,
- FIG. 9 is a top view of the carcass of Figure 8.
- FIG. 13 is a schematic view showing the different strips used to make a magnetic ring:
- FIG. 14 is an exploded perspective view, broken away, showing the mounting of the low voltage socket on the top of the carcasses;
- FIG. 15 is a perspective view of the switch for adjusting the transformation ratio
- FIG. 16 is a schematic view of the wiring of the voltage adjustment pads
- FIG. 17 is a top view of a single-phase transformer with axial section of the magnetic circuit
- - Figure 18 is a view similar to Figure 17 but showing a transformer in which the high voltage and low voltage electrical circuits are mounted in two separate carcasses;
- FIG. 19 is a view of a variant of the transformer of Figure 18, the electrical circuits being seen in section along the plane XIX-XIX of Figure 18;
- FIG. 20 is a view similar to Figure 18, but showing a three-phase transformer in which all the rings of the magnetic circuit are located in the same plane.
- the three-phase transformer is arranged in a triangular section tank with rounded tops, having a bottom 2 and a cover 3 whose periphery is constituted by an oblique wall 4 bearing in an angular arrangement ent distributed over the three high voltage terminals 6 of the device.
- the tank 1 is filled with electrically insulating mineral oil.
- the transformer proper comprises a magnetic circuit 7 consisting of three rings circular 8 made of magnetic sheet, each of which has a frustoconical face 7 by which it is attached to the frustoconical face 7 of the other two rings so that the planes of the rings 8 are arranged along the lateral faces of a prism.
- the structure, - magnetic rings 8 will be described in detail below.
- the transformer also includes electrical circuits 9 arranged around the magnetic circuit, each around one of the sections where two rings 8 are joined.
- the electrical circuits 9 are arranged in carcases 11 having a central i_ubular part 12, of circular section, around which the electrical circuits are wound, and reserving a window 13 therein for the passage of magnetic rings 8.
- a flange 14 directed radially outwards, intended to laterally hold the electrical windings.
- L s carcasses 11 are made of insulating material such as plastic. As shown in FIG. 7, the carcasses 11 are produced in two parts fitted into one another according to a fitting surface 16 which surrounds the central part 12 equidistant from the edges 14. The joint surface 16 forms a step whose height can be adjusted so as to reserve between the window 13 and the annular housing reserved for the electrical circuits, a leak path was long enough to ' not allow electrical ignition between the electrical coils and the magnetic rings.
- Each carcass 11 contains a high circuit voltage 17 ( Figure 8) and a low voltage circuit 18.
- the high voltage circuit 17 is formed of turns of copper or aluminum wire located at the bottom of the carcass 11, it is ie against the central part 12. As shown in FIGS. 8 and 10, the turns of circuit 17 are arranged in rows 19 separated by sheets of insulating paper 21. At each layer, the sheets 21 have a slightly greater width to the
- the low voltage circuit 18 is constituted an aluminum strip 23 wound around the high voltage circuit 17. Between each layer of the strip 23 and each edge 14 of the carcass is interposed a strip of cardboard 24.
- the strip 23, the strips 0 24 and a sheet of paper 26 for separation. layers are rolled in a single operation, the sheet 26 having, like the sheets 21, a flange 27 on each side of the strip 23.
- annular channel 28 allowing the passage of the oil as coolant.
- the channel 28 is delimited by two sheets of cardboard 29 braced by wooden sticks (not shown) parallel to the axis of the carcass.
- edges 14 of the carcass 11 have a series of orifices 31 allowing the communication of the channel 28 with the exterior of the carcass 11.
- Each carcass 11 also carries two 5 chimneys 32 directed axially towards the cover 3 of the tank 1, which each allow the exit from one of the ends of the high-voltage winding 17. Furthermore, each carcass 11 has a square notch 33 (FIGS. 8 and 9) directed towards the axis ZZ of the device ( Figure 4), by which protrude towards the cover 3 two legs 34 welded to the ends of the low voltage circuit 18.
- each edge 14 has a tongue 36 offset by 30 ° relative to the notch 33, and a correspondingly shaped housing 37 located opposite the tongue 36 relative to the notch 33 ,
- the tongues 36 and the housings 37 of the different carcasses are fitted into one another and welded by ultrasound or glued.
- the positioning of the active part of the transformer in the tank can be carried out exclusively by means of the carcasses 11 resting on the side wall of the tank 1.
- the carcasses 11 resting on the side wall of the tank 1.
- the carcasses 11 which are arranged concentrically with the rounded edges of the side wall of the tank 1 are each carried by four brackets 81 welded with
- each bracket 81 is interposed an insulating wedge 82 screwed to the square 81 by means of a screw 83 which, once mounted, has its head 5 embedded in a well 84 of the wedge 82 so as to avoid the risks of electric ignition.
- the shims 82 are shouldered so as to ensure at the same time the centering of the active part of the transformer in the tank '1.
- a sheet o of rubber may be interposed between each bracket 81 and the shim 82 to absorb the operating vibrations of the transformer.
- a single socket 38 is connected at the same time to the six blades 34 connected to the five ends of the three low voltage windings 18 contained in one of the carcasses 11. From the socket 38, which contains the internal connections to the transformer between the low voltage windings, leave three phase conductors o 39 each connected to a low voltage phase terminal 41 arranged on a flat of one of the rounded corners of the transformer tank. A fourth conductor (not shown), located under the conductors 39, connects the socket 38 5 to a neutral terminal (not shown), arranged under the terminals 41. As shown in FIG. 14, the socket 38 carries three tabs 42 intended for be welded by ultrasound or glued at locations 43 of the coils 11- Once this attachment has been made, the blades 34 are then riveted to the socket 38. 1 0
- the underside of the carcasses 11 has, approximately in line with the blades 34, a series of four studs 43 arranged in an arc centered on the axis ZZ ( Figure 5).
- the apparatus further comprises a switch with three star branches 44, mounted in rotation about the axis ZZ by means of a control rod 45 (FIG. 14) passing through the apparatus along this axis, and supported by two bearings arranged in triangular plastic frames 46 ( Figure 5), 47 ( Figure 4) fitted between the magnetic rings 8, one 46 below the other 47 above the carcasses 11.
- the socket 38 has a bore 48 to allow the passage of the rod 45 which also passes through the cover 3 of the device and is connected outside of the latter to a control wheel 49 ( Figures 1 and 2).
- Each branch 51. of the switch 44 carries at its end a ball 52 pushed by a spring 53 and bearing on the inner wall of a tubular roller Q 54 which can take a choice of three rest positions in which it is astride between two studs successive 43 between which it establishes a short circuit.
- the studs 43 are connected to the high-voltage winding 17 so that two successive studs 43a_, 43b_ are connected to the same turn, the stud 43c_ being separated from the studs 43a_, 43_b_ by a number of turns and the pad 43_d_ being separated from the pad 43ç_ by a double number of turns.
- the switch 44 makes it possible, starting from the dial 0 49, to adjust the number of active turns of the high-voltage circuit, and consequently the transformation ratio of the transformer.
- each ring 8 contains, assembled by the tongues 36, housings 37, together have a circular profile.
- the electrical circuits which thus find juxtaposed in the plane of each ring 8 are the low voltage circuits 18, the space 57 reserved between them can be very thin without risk of short circuit.
- the magnetic rings 8 in addition to their frustoconical face 7, also have a substantially semi-toric face 58 whose profile is inscribed in a semicircle whose diameter corresponds substantially to the diameter of the window 13 carcasses 11.
- Each substantially semi-toric face 58 is connected by its two annular edges 59, 61 to the frustoconical face 7 of the sleeve 8.
- the two rings 8 joined together have a circular profile which occupies almost all of window 13.
- the rings 8 are made by means of magnetic sheet metal sheets rolled around the geometric axis of the ring.
- the first 62 has the shape of a rectangular trapezoid whose bases are perpendicular to the longitudinal direction of the strip. This strip is rolled first, from its small base, and its inclined edge 63 being directed towards the outside of the device.
- the following strip 64 is rectangular, it is rolled with a slight offset towards the outside of the device at each turn so that the face 7 of the ring has the desired taper with 60 ° angle at the top.
- the next strip 66 has again the shape of a rectangular trapezoid, its inclined edge this time being on the side of the interior of the device.
- the strips 67 and 68, which are then rolled, are both trapezoidal.
- the trapezoidal strips can be produced without falling from a strip of constant width equal to the sum of the large base and the small base of the desired trapezoidal strips.
- This principle of slitting is shown diagrammatically by the strip 62 ′ shown in dotted lines in FIG. 13.
- the strips 67 and 68 which constitute non-rectangular trapezoids can be produced in the same way from rectangular trapezoids which are inclined slightly. 5
- the magnetic sheet strips necessary for the realization of the magnetic circuit are prepared by slitting; 0 -on coil on a circular mandrel having substantially the diameter of the profile of the carcasses 11, the strips of magnetic sheet in the position which they must then occupy in the assembled transformer; 5 - the magnetic rings thus preassembled are relaxed by subjecting them to an annealing heat treatment,
- the high and low voltage electric windings are wound on the carcasses 11, m, - - the carcasses are assembled together, the various connections between the hoarse 13 the ents, in particular the socket 38, and the interconnections 77 (FIG. 4) between the windings 17;
- the magnetic rings 8 are then wound around the carcasses 11.
- the strips intended to constitute the rings 8 themselves take the desired shape since they have been annealed in this position.
- the single-phase transformer comprises a circular magnetic circuit 69 whose circular profile fits exactly in the circular window 71 of a carcass 72 of semi-circular profile, which contains at its bottom a high voltage electrical circuit 73 and on its periphery a low voltage electrical circuit 74.
- the circuit 74 greatly exceeds the carcass so that the carcass assembly 72, circuits 73 and 74 has a substantially circular section which roughly corresponds to the window 76 of the magnetic circuit 69.
- contact between the circuit 74 and the ring 69 must be avoided. A relatively small interval is sufficient for this purpose since the circuit 74 is the low voltage circuit.
- the circuit 69 is surrounded / in two diametrically opposite sections, by two carcasses 72 situated substantially in the same plane.
- One of the carcasses contains the high voltage electrical circuit, the other the low voltage electrical circuit.
- the magnetic ring 69 can be circular like the rings 8 of FIGS. 1 to 16. 15
- the ring 69 can also be rectangular or square, in which case the carcasses 72 are cylindrical with flat edges.
- This advantageous solution in terms of space has the drawback that the magnetic circuit cannot be produced according to the method which has been described with reference to FIGS. 1 to 5. It must either be carried out by means of stacked sheets assembled for example with a tab, as shown in
- FIG. 20 is similar to that of FIG. 18 but applied to a three-phase transformer, the magnetic rings 69 have a semicircular profile externally limited by a cylindrical surface 76. There are four of them all arranged in the same plane with their axes in the same 0 plane.
- the carcasses 72 three in number, each contain a high voltage circuit and a low voltage circuit, are each of semi-circular section. They each surround one of the sections of the magnetic circuit where two rings 69 are tangent.
- the carcasses 72 are also located in the same plane with their geometric axes in the same plane. It is therefore seen from these briefly described examples that the carcasses according to the invention are applicable to very many structures of 0 transformers providing in each case substantial advantages.
- the invention is not limited to single-phase or three-phase transformers, and that devices with a greater number of phases can naturally be produced with the same advantages.
- the invention advantageously lends itself to the use of amorphous magnetic materials. - also called metallic glasses - to make the magnetic rings.
- the metallic glasses which are in the form of strip of l /. j0n th th approximately, offer their excellent magnetic qualities only when they are free from mechanical stresses. This condition, usually difficult to achieve, is on the contrary fulfilled by itself thanks to the invention when the carcasses are alone fixed to the tank and carry the magnetic circuits.
- the sheet of metallic glass can be rolled into a structure close to those shown in the figures, the number of winding turns being naturally much greater.
- the strip used to make the low voltage electrical circuits may be made of copper.
- the cooling channels 28 can be produced from a profiled piece of flexible plastic material, having substantially the shape of a ladder, which is deformed to surround the high-voltage electrical circuit before rolling the strip. low tension.
- the three studs 43__, belonging to the three carcasses 11 can be electrically connected, which makes it very simple to mount the high voltage circuit in a star.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Le transformateur comprend un circuit magnétique (8), ainsi que, pour chaque phase, un circuit électrique haute tension (17) et un circuit électrique basse tension (18) tous deux bobinés autour d'un tronçon au moins du circuit magnétique (8). Les circuits électriques (17, 18) sont aménagés dans au moins un carcasse annulaire électriquement isolante (11) qui, en service, se trouve interposée entre les circuits électriques (17, 18) et le tronçon précité du circuit magnétique (8). Utilisation en particulier pour améliorer l'occupation des fenêtres électriques par le circuit magnétique et des fenêtres magnétiques par le circuit électrique.The transformer comprises a magnetic circuit (8), as well as, for each phase, a high voltage electric circuit (17) and a low voltage electric circuit (18) both wound around at least one section of the magnetic circuit (8) . The electrical circuits (17, 18) are arranged in at least one electrically insulating annular carcass (11) which, in service, is interposed between the electrical circuits (17, 18) and the aforementioned section of the magnetic circuit (8). Use in particular to improve the occupation of electric windows by the magnetic circuit and magnetic windows by the electric circuit.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82903586T ATE22192T1 (en) | 1981-12-11 | 1982-12-10 | ELECTRICAL TRANSFORMER AND PROCESS FOR ITS MANUFACTURE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8123146 | 1981-12-11 | ||
FR8123146A FR2518306B1 (en) | 1981-12-11 | 1981-12-11 | ELECTRIC TRANSFORMER AND METHOD FOR THE PRODUCTION THEREOF |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0096058A1 true EP0096058A1 (en) | 1983-12-21 |
EP0096058B1 EP0096058B1 (en) | 1986-09-10 |
Family
ID=9264897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82903586A Expired EP0096058B1 (en) | 1981-12-11 | 1982-12-10 | Electric transformer and method for making it |
Country Status (8)
Country | Link |
---|---|
US (2) | US4588971A (en) |
EP (1) | EP0096058B1 (en) |
JP (1) | JPS58502174A (en) |
CA (1) | CA1184621A (en) |
DE (1) | DE3273248D1 (en) |
FR (1) | FR2518306B1 (en) |
IT (1) | IT1149149B (en) |
WO (1) | WO1983002194A1 (en) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2561033B1 (en) * | 1984-03-06 | 1988-11-10 | Beisser Jean Claude | TRANSFORMER AND MANUFACTURING METHOD THEREOF |
FI69944C (en) * | 1984-06-27 | 1986-05-26 | Kone Oy | SAETT ATT PLACERA DROSSLAR MED LUFTKAERNA |
US5329269A (en) * | 1990-08-10 | 1994-07-12 | Watson William S | Single core triaxial flux-gate magnetometer |
GB9112435D0 (en) * | 1991-06-10 | 1991-07-31 | Gec Alsthom Ltd | Distribution transformers |
GB2283864B (en) * | 1991-06-10 | 1996-01-10 | Gec Alsthom Ltd | Distribution transformers |
US5202664A (en) * | 1992-01-28 | 1993-04-13 | Poulsen Peder Ulrik | Three phase transformer with frame shaped winding assemblies |
US5168255A (en) * | 1992-03-24 | 1992-12-01 | Poulsen Peder Ulrik | Three phase transformer |
DE4237242A1 (en) * | 1992-05-15 | 1994-05-05 | Reinhausen Maschf Scheubeck | Step switch for a preferably cast-resin-insulated step transformer |
JP2771109B2 (en) * | 1994-03-16 | 1998-07-02 | 北村機電株式会社 | Wound iron core |
CA2328193A1 (en) * | 1998-04-13 | 1999-10-13 | Alfonso Hernandez Cruz | Cores and coils for electrical transformers |
DE69922094T2 (en) | 1998-07-31 | 2005-12-01 | Hitachi, Ltd. | Transformer core made of amorphous metal |
DE19843415A1 (en) * | 1998-09-22 | 2000-03-23 | Philips Corp Intellectual Pty | Inductive component with a rod core |
SE0000410D0 (en) * | 2000-02-06 | 2000-02-06 | Lennart Hoeglund | Three phase transformer core |
US6885536B1 (en) * | 2001-08-31 | 2005-04-26 | The Texas A&M University System | Method and apparatus for magnetically generating motion with high precision |
RS51714B (en) * | 2008-09-05 | 2011-10-31 | Abs Minel Trafo Ad-Joint Stock Company | Wound delta magnetic core for three-phase transformer |
AU2010321637B2 (en) | 2009-11-19 | 2016-12-22 | Hydro-Quebec | Electrical transformer assembly |
ES2530055T3 (en) * | 2011-02-16 | 2015-02-26 | Abb Technology Ag | Cooling system for dry transformers |
US20140268896A1 (en) * | 2011-05-16 | 2014-09-18 | Hitachi Ltd. | Reactor Apparatus and Power Converter Using Same |
CN106882651B (en) | 2011-05-18 | 2019-08-16 | 魁北克水电公司 | Ferromagnetic metallic ribbon conveying equipment and method |
MY177569A (en) * | 2011-05-27 | 2020-09-21 | Guangdong Haihong Co Ltd | Amorphous alloy stereo wound-core |
RS52864B (en) | 2011-07-22 | 2013-12-31 | Ivan PEJČIĆ | Delta magnetic core for three-phase transformer |
CN202258680U (en) * | 2011-08-02 | 2012-05-30 | 广东海鸿变压器有限公司 | Oil-immersed type three-dimensional rolled iron-core amorphous-alloy transformer |
ES2841987T3 (en) * | 2012-01-18 | 2021-07-12 | Abb Power Grids Switzerland Ag | Transformer core |
EP2618347B1 (en) * | 2012-01-18 | 2020-11-18 | ABB Power Grids Switzerland AG | Transformer-core |
CN104321841A (en) * | 2012-05-03 | 2015-01-28 | Abb技术有限公司 | Method, mold and system for manufacturing a transformer coil |
CN102682988A (en) * | 2012-05-28 | 2012-09-19 | 广东海鸿变压器有限公司 | Amorphous alloy transformer iron core of three-dimensional triangle structure |
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EP3039698B1 (en) * | 2013-08-27 | 2018-10-10 | Maschinenfabrik Reinhausen GmbH | On-load tap changer, a step transformer and corresponding method of tap changing |
CN206672769U (en) * | 2017-04-01 | 2017-11-24 | 海鸿电气有限公司 | A kind of new transformer three dimensional wound core low voltage lead structure |
FR3109678B1 (en) * | 2020-04-27 | 2022-04-22 | Renault Sas | Battery charger for a motor vehicle, vehicle and associated method of implementation |
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GB499010A (en) * | 1937-07-01 | 1939-01-17 | British Thomson Houston Co Ltd | Improvements in and relating to electric transformers |
DE691531C (en) * | 1937-07-02 | 1940-05-29 | Aeg | Multiphase sheathed transformer |
US2220733A (en) * | 1938-01-25 | 1940-11-05 | Gen Electric | Transformer and method of making the same |
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GB540869A (en) * | 1940-07-25 | 1941-11-03 | Edward Philip Harrison | Improvements in and relating to cores for instruments, apparatus and machines making use of magnetic induction |
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US2498747A (en) * | 1944-09-20 | 1950-02-28 | Mcgraw Electric Co | Electromagnetic device and method of making the same |
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FR1007119A (en) * | 1948-02-26 | 1952-05-02 | Electromagnetic system, especially in the form of a transformer | |
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US3201734A (en) * | 1960-08-03 | 1965-08-17 | Fed Pacific Electric Co | Transformer core and winding |
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FR2123093B1 (en) * | 1970-12-14 | 1974-03-22 | Unelec | |
IT1031939B (en) * | 1974-02-22 | 1979-05-10 | Hirst H | SPOOL IN PARTICULAR COIL ON WHICH AN ELECTRIC WINDING CAN BE MOUNTED |
US4338657A (en) * | 1974-05-21 | 1982-07-06 | Lisin Vladimir N | High-voltage transformer-rectifier device |
SU905905A1 (en) * | 1978-09-08 | 1982-02-15 | Предприятие П/Я Р-6517 | Rectifying transformer device |
FR2379890A1 (en) * | 1977-02-07 | 1978-09-01 | Andreev Gennady | Three=phase transformer core - has three rectangular rings with parallel sides adjacent, to form triangular prism shape |
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JPS5632709A (en) * | 1979-08-25 | 1981-04-02 | Towa Giken:Kk | Three-phase wound iron core transformer |
-
1981
- 1981-12-11 FR FR8123146A patent/FR2518306B1/en not_active Expired
-
1982
- 1982-12-10 US US06/527,650 patent/US4588971A/en not_active Expired - Fee Related
- 1982-12-10 JP JP58500019A patent/JPS58502174A/en active Pending
- 1982-12-10 WO PCT/FR1982/000209 patent/WO1983002194A1/en active IP Right Grant
- 1982-12-10 CA CA000417432A patent/CA1184621A/en not_active Expired
- 1982-12-10 DE DE8282903586T patent/DE3273248D1/en not_active Expired
- 1982-12-10 EP EP82903586A patent/EP0096058B1/en not_active Expired
- 1982-12-13 IT IT49662/82A patent/IT1149149B/en active
-
1985
- 1985-03-28 US US06/718,014 patent/US4651412A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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See references of WO8302194A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3273248D1 (en) | 1986-10-16 |
US4651412A (en) | 1987-03-24 |
WO1983002194A1 (en) | 1983-06-23 |
IT1149149B (en) | 1986-12-03 |
FR2518306B1 (en) | 1986-11-28 |
EP0096058B1 (en) | 1986-09-10 |
FR2518306A1 (en) | 1983-06-17 |
IT8249662A0 (en) | 1982-12-13 |
CA1184621A (en) | 1985-03-26 |
US4588971A (en) | 1986-05-13 |
JPS58502174A (en) | 1983-12-15 |
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