DK175598B1

DK175598B1 - Power transformer with reduced heat loss

Info

Publication number: DK175598B1
Application number: DK515089A
Authority: DK
Inventors: Jean-Yves Buatois; Jean-Michel Bouillot
Original assignee: Orega Electro Mecanique
Priority date: 1988-10-21
Filing date: 1989-10-17
Publication date: 2004-12-13
Also published as: DK515089D0; DE68907007T2; EP0365407A1; DE68907007D1; EP0365407B1; FR2638277A1; ES2041025T3; DK515089A

Description

DK 175598 B1 iDK 175598 B1 i

Den foreliggende opfindelse angår en effekttransformator med reduceret varmetab.The present invention relates to a reduced heat loss power transformer.

5 Kendte elektriske transformatorer transmitterer en forhøjet effekt, der på trods af udfoldede bestræbelser på at realisere deres viklinger og deres magnetiske kredsløb frigører en kraftig termisk effekt, dvs. taber "kobber" ved Joules effekt i viklingerne og taber "jern" i det 10 magnetiske kredsløb.Known electrical transformers transmit an increased power which, despite unfolding efforts to realize their windings and magnetic circuits, releases a strong thermal power, ie. loses "copper" by Joule's power in the windings and loses "iron" in the 10 magnetic circuit.

For at begrænse den forhøjede temperatur i disse transformatorer, hvilket risikerer at ødelægge dem, forsyner man dem med termiske radiatorer og/eller man forbinder 15 dem til midler for tvungen ventilation, hvilket mærkbart forøger deres pladsbehov. Endvidere er ventilationsmidlerne ikke forskånet mod uheld.In order to limit the elevated temperature of these transformers, which may destroy them, they are provided with thermal radiators and / or connected to means of forced ventilation, which noticeably increases their space requirements. Furthermore, the ventilation means are not spared accident.

Den foreliggende opfindelse har til formål at tilveje-20 bringe en effekttransformator, der ikke behøver af kølingsmidler eller i det mindste med afkølingsmidler af mindre betydning såsom kølemidler for klassiske transformatorer med samme elektriske karakteristik og funktions-temperatur .The present invention has for its object to provide a power transformer which does not need refrigerants or at least with refrigerants of minor importance such as refrigerants for classic transformers with the same electrical characteristics and operating temperature.

2525

Transformatoren ifølge opfindelsen omfatter en spolevikling, der er sammensat af to identisk parallelt forgrenede dele, der hver omfatter mindst én omvikling.The transformer according to the invention comprises a coil winding composed of two identical parallel-branched parts, each comprising at least one winding.

30 Det magnetiske kredsløb af en sådan transformator er med fordel sammensat af to identiske kredsløbsdele, der er placeret symmetrisk i forhold til et plan, idet hver af de to kredsløbsdele bærer en af de nævnte spoleviklings-dele, og idet spoleviklingsdelene er viklet symmetrisk i 35 forhold til nævnte symmetriplan. Da det magnetiske kredsløb omfatter to kredsløbsdele, der hver set i tværsnit udgør et ”E", er det en fordel, at luftspalten er place- DK 175598 B1 2 ret på det centrale ben af "E’et".The magnetic circuit of such a transformer is advantageously composed of two identical circuit parts located symmetrically with respect to a plane, each of the two circuit parts carrying one of said coil winding parts and the coil winding parts being symmetrically wound in 35 relation to said plane of symmetry. Since the magnetic circuit comprises two circuit parts, each seen in cross-section as an "E", it is advantageous that the air gap be placed on the central leg of the "E".

Den foreliggende opfindelse forstås bedre ved gennemgangen af den detaljerede beskrivelse af en udførelses-5 form, som er taget som et ikke begrænsende eksempel og som er illustreret ved den ledsagende tegning, på hvilken: fig. 1 viser et skematisk billede af placeringen af di-10 verse omviklinger af en transformator ifølge opfindelsen, og fig. 2 viser et simplificeret tværsnit, hvor transformatoren, der er vist på fig. 1, er udraderet.The present invention is better understood by reviewing the detailed description of an embodiment taken as a non-limiting example and illustrated by the accompanying drawings in which: 1 shows a schematic view of the location of various windings of a transformer according to the invention, and FIG. 2 shows a simplified cross-section where the transformer shown in FIG. 1 is erased.

1515

Transformatoren, der er beskrevet i det efterfølgende, er en transformator, som er baseret på spænding, og som f.eks. er bestemt til en forsyning med opdeling. Det magnetiske kredsløb er sammensat af to ferritkerner i et 20 "E". Det bemærkes, at opfindelsen ikke er begrænset til en sådan anvendelse og en sådan type transformator, idet transformatoren lige såvel kan være baseret på højspænding og dets kredsløb kan lige så godt være en ferrit-kerne, der er sammensat af en opstabling af pladejern.The transformer described hereinafter is a transformer which is voltage based and which e.g. is destined for a supply of division. The magnetic circuit is composed of two ferrite cores in a 20 "E". It should be noted that the invention is not limited to such application and type of transformer, the transformer being equally based on high voltage and its circuitry being equally capable of a ferrite core composed of a stack of sheet iron.

25 Det er endvidere tilstrækkeligt, at de to dele af det magnetiske kredsløb er praktisk talt identiske, idet deres form kan være forskellig fra et "E".Furthermore, it is sufficient that the two parts of the magnetic circuit are practically identical in that their shape may be different from an "E".

Spolevikling 1 af transformatoren er repræsenteret på en 30 meget forenklet måde på fig. 1. Denne spolevikling er sammensat af to halvviklinger 2 og 3. Disse halvviklinger 2 og 3 er identiske og placeret symmetrisk i forhold til et symmetriplan, der på tegningen er repræsenteret ved sporet 4. 1 35 det foreliggende tilfælde er hver halvvikling 2 og 3 sammensat af fem omviklinger, der er viklet om spolen for 3 DK 175598 B1 at udgøre en fladspole. Fladspolerne er henvist til med A, B, C, D, E for halwiklingen 2 og A', B', C’, D’ og E' for halwiklingen 3. Fladspoler AT til E* er respektivt identiske med fladspolerne A til E. De identiske fladspo-5 ler er placeret symmetrisk i forhold til den nævnte symmetriplan, sporet 4, idet fladspolen A og A* er de, der er tættest til dette plan, og fladspolerne E og E1, er de, der er længst væk.Coil winding 1 of the transformer is represented in a very simplified manner in FIG. 1. This coil winding is composed of two half-windings 2 and 3. These half-windings 2 and 3 are identical and located symmetrically with respect to a plane of symmetry represented in the drawing by the track 4. In the present case, each half-winding 2 and 3 is composed of five windings wound about the coil for 3 DK 175598 B1 to constitute a flat coil. The flat coils are referred to with A, B, C, D, E for the half winding 2 and A ', B', C ', D' and E 'for the half winding 3. Flat coils AT to E * are respectively identical to the flat coils A to E. The identical flat coils 5 are located symmetrically with respect to said symmetry plane, the groove 4, the flat coils A and A * being the closest to this plane and the flat coils E and E1 being the furthest away.

10 Det forstås, at for andre realisationer, kan man forudsige fladspoler, der er ringformede, en samling eller et parti ringe af hver halwikling, som er placeret i den samme afstand fra ovennævnte syrometriplan, i hvilket tilfælde deres diametre er forskellige.It is to be understood that for other realizations, flat coils which are annular can be predicted an assembly or portion of each half winding located at the same distance from the above symmetry plane, in which case their diameters are different.

15 I det foreliggende eksempel omfatter det magnetiske kredsløb af transformatoren, således som det er vist på fig. 2, to identiske dele 5,6 af jern i form af et "E", der er placeret symmetrisk i forhold til nævnte symmetri-20 plan. De to eksterne ben af hvert "E" er af samme længde, benene 7,8 for delen 5 og benene 9,10 for delen 6. De interne ben af "E", dvs. ben 11 i del 5 og ben 12 i del 6, er meget kortere end de eksterne ben, hvilket danner en luftspalte 13 mellem de indre ben. Det faktum, at den-25 ne luftspalte er placeret i centret af viklingen, den eller tykkelsen af skelettet er det vigtigste, idet de af feltlinierne i luftrummet fremprovokerede forstyrrelser på omgivelserne reduceres.In the present example, the magnetic circuit of the transformer, as shown in FIG. 2, two identical parts 5.6 of iron in the form of an "E" which are located symmetrically with respect to said plane of symmetry. The two external legs of each "E" are of the same length, the legs 7,8 for the part 5 and the legs 9,10 for the part 6. The internal legs of "E", ie. leg 11 in part 5 and leg 12 in part 6, are much shorter than the external legs, forming an air gap 13 between the inner legs. The fact that this air gap is located in the center of the winding, or the thickness of the skeleton is the most important, as the disturbances caused by the field lines in the air space are reduced.

30 Viklingsskelettet 14, der delvist er vist på fig. 2, har form af et rør, der i dette tilfælde har et cirkulært tværsnit, støtter flere skiver, der i det foreliggende tilfælde har en cirkulær periferi. Planet 4 går igennem centret af den centrale skive 15. De fire øvrige synlige 35 skiver på fig. 2 er placeret symmetrisk i forhold til planet 4, nemlig skiverne 16,17 ved siden af skiven 15 og skiverne 16* og 17* på den anden side, og respektive DK 175598 B1 4 symmetrier af skiverne 16 og 17. Fladspolerne af omviklingerne A, B er viklet mellem skiverne 15,16 og 16,17, medens fladspolerne af viklingerne a’,b' er viklet mellem skiverne 15,16’ og 16',17'.30 The winding skeleton 14, partially shown in FIG. 2, in the form of a tube which in this case has a circular cross section, supports several discs which in the present case have a circular periphery. The plane 4 passes through the center of the central disc 15. The four other visible 35 discs in FIG. 2 is symmetrical with respect to the plane 4, namely the discs 16,17 next to the disc 15 and the discs 16 * and 17 * on the other side, and respective symmetries of the discs 16 and 17. The flat coils of the wraps A, B is wound between washers 15,16 and 16,17, while the flat coils of windings a ', b' are wound between washers 15,16 'and 16', 17 '.

55

Tykkelsen af skiven 15 er med fordel større end tykkelsen af de øvrige skiver af skelettet 14 for at undgå, at fladspolerne A og A* ikke er på niveau med luftspalten 30.The thickness of the disc 15 is advantageously greater than the thickness of the other discs of the skeleton 14 in order to prevent the flat coils A and A * from being level with the air gap 30.

1010

Som følge af den parallelle anvendelse af forskellige viklinger, der svarer til hver halvvikling 2 og 3, og som følge af den rumlige symmetri i forhold til planet 4 af disse viklinger og det magnetiske kredsløb formindskes 15 transformatorens varmetab.Due to the parallel use of different windings corresponding to each half winding 2 and 3 and due to the spatial symmetry with respect to the plane 4 of these windings and the magnetic circuit, the heat loss of the transformer is reduced.

20 25 30 3520 25 30 35

Claims

A reduced heat loss power transformer of the type comprising a coil winding composed of two parallel identical branched portions (2,3), each comprising at least one winding (A, A '...), characterized know that their magnetic circuit is composed of two! identical circuit parts (5,6) symmetrically positioned 10 relative to a plane (4), which two magnetic circuit parts carry one of the two winding parts (2,3).

Transformer according to claim 1, characterized in that the two winding parts are symmetrically wound relative to the plane of symmetry (A and A ', B and B' ...).

Transformer according to one of the preceding claims, for which the magnetic circuit comprises two circuit parts, each of which in cross section is in the form of an "E", characterized in that the air gap is located in the outer edge of the central leg (11, 12) of the "E".

Transformer according to any one of the preceding claims, for which the winding skeleton (14) is composed of 25 discs formed on a cylinder, characterized in that the skeleton comprises a central disc (15) located in the plane of symmetry of the transformer. the other discs (16,17 and 16 ', 17') being symmetrically positioned relative to each other and away from the central disc. 30

Transformer according to claim 4, characterized in that the central disc has a thickness much larger than the other discs. 35