EP4102522A1 - Transformateur triphasé - Google Patents

Transformateur triphasé Download PDF

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Publication number
EP4102522A1
EP4102522A1 EP21884125.2A EP21884125A EP4102522A1 EP 4102522 A1 EP4102522 A1 EP 4102522A1 EP 21884125 A EP21884125 A EP 21884125A EP 4102522 A1 EP4102522 A1 EP 4102522A1
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EP
European Patent Office
Prior art keywords
magnetic
rods
spatial
magnetic conductor
plates
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.)
Pending
Application number
EP21884125.2A
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German (de)
English (en)
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EP4102522A4 (fr
Inventor
Bilyi Leonid Adamovych
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Individual
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Individual
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Publication date
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Publication of EP4102522A1 publication Critical patent/EP4102522A1/fr
Publication of EP4102522A4 publication Critical patent/EP4102522A4/fr
Pending legal-status Critical Current

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    • 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
    • H01F27/24—Magnetic cores
    • 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
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented

Definitions

  • the invention relates to the field of electrical engineering in particular to the design of transformers and can be used in all industries that need devices that can transform high-quality energy (without higher harmonics), independently eliminate voltage distortions in case of an asymmetric load, regulate voltage independently smoothly and over a wide range when changing load, and devices that have significantly higher reliability and a working resource.
  • Such properties of a transformer can only be provided by a spatial magnetic system that adequately reproduces or models the phenomenon of electromagnetism, the form and physics of which is to cover the current conductor by a magnetic conductor, while the metamorphoses disappear such as the need to replace the volumetric field with a plane-parallel one, the scattering of this field into the surrounding space and etc., but the manufacture of a spatial magnetic conductor requires a larger amount of steel.
  • Three-phase spatial radial magnetic conductors of increased compactness are known, the rods and yokes of which are formed from two groups of chevron elements that have different length, and part of the yoke sections is made of elements having the shape of a parallelogram with angles of 60° and 120° (Patent of Ukraine for the invention UA 100077C2, Patent of Ukraine for utility model UA 99327).
  • Such magnetic conductors have a number of disadvantages: the impossibility of installing separately manufactured windings on the magnetic conductor rods, since the rods have a geometry "in the form of a chevron of various length". The process of the winding on the finished magnetic conductor greatly complicates the technological process of the transformer manufacturing.
  • a spatially symmetrical magnetic conductor which has an upper and lower wound yokes interconnected by rods, while the geometry of the cross section of the rods and yokes at the junctions is made with a square cross section (RF Patent RU No. 2380780 C1 ).
  • Such magnetic conductors with spatial arrangement of rods eliminate only the magnetic asymmetry of planar E-shaped cores, and the technical result in reducing losses in steel was achieved through the use of amorphous steel, which can also be achieved in a E-shaped magnetic conductor. Due to the low mechanical strength of amorphous steel (brittle like glass), special requirements are imposed on the design of such cores and the conditions for their production, since the magnetic conductor is a supporting structure that holds the entire active part. Amorphous steel does not allow excessive weight loading, and the inventors do not take into account this fact.
  • a three-phase transformer prototype is the closest to the proposed one according to the set of features and technical results (Patent of Ukraine for the invention UA No. 84746 ).
  • Three-phase transformer which contains low and high voltage windings in each phase and a folded magnetic system, characterised in that the magnetic system consists of a yoke and six rods arranged in the form of a six-beam star with spatial angles of 60 degrees between them and outside covered by the yoke, phase windings as part of the primary and secondary windings of one phase are located on three rods through one, the other three rods are free from windings and are shunt, on each of the six sections of the yoke there is an additional magnetizing winding, two for each phase, which are located in different sides of the corresponding phase of winding, the magnetic system is made with a ratio of its width and the width of the rods greater than one.
  • Three-phase transformer according to claim 1 characterised in that the magnetic system is made in the form of a cylinder, the cross section of which is a six-beam star of the rods, covered by an annular yoke.
  • Three-phase transformer according to claim 1 characterised in that the magnetic system is made in the form of a hexagonal prism, the cross section of which is a six-beam star of the rods, covered by a hexagonal yoke.
  • Magnetic system consists of a six-beam star of rods with spatial angles of 60°, covered by a six-sided yoke.
  • the prototype has a number of disadvantages, the main of which are the following:
  • the objective of the invention is to improve the production technology and reduce the weight and size characteristics of a spatial magnetic conductor in comparison with the prototype, the combination in the transformer of the functions of a higher harmonic filter, a balancing device and a voltage stabilizer.
  • a three-phase transformer contains of the main primary and secondary windings, a spatial magnetic system composed of plates of electrical steel, the magnetic system is formed by six regular trihedral prisms, made up of analogous plates, and interconnected by a common rib, forming a hexagonal prism with a six-beam star in cross section, the adjacent edges of the star are the rods of the magnetic conductor, and the autonomous edges are the hexagonal yoke, the vertical density of the plates of the magnetic conductor is provided by central and lateral fastening, the turns of the main and additional windings divided in half are placed in phase on the rods with a spatial angle of 60 °, the magnetic system is made with the ratio of the width of the rod and the yoke equal to two and the height of the prism to the width of the beam greater than five.
  • a three-phase transformer according to claim 1 characterised in that the main and additional windings are placed jointly on the rods with a spatial angle of 120°.
  • Three-phase transformer according to claim 1 characterised in that the spatial magnetic conductor is made of amorphous electrical steel with a thickness of 10 to 30 microns.
  • a three-phase transformer ( Fig. 1 ) contains primary and secondary (main) windings 3 and additional windings 4, the transformation coefficient of which is greater than the main ones, a folded magnetic system ( Fig. 1 pos. 1, 2).
  • the spatial magnetic system is formed by six regular trihedral prisms ( Fig. 5 ), made by burdening of plates ( Fig. 2 ) into successive layers ( Fig. 3 , Fig. 4 ) and connected by a common edge.
  • the adjacent edges of the prisms serve as rods 1, and the autonomous edges serve as yokes 2.
  • the magnetic conductor is made of plates of electrical steel, Fig. 2 , with a thickness of 0.27 mm, 0.35 mm or it is made of amorphous steel strips with a thickness of 10-30 microns.
  • the vertical density of the plates of the magnetic conductor is carried out by the central 5 and side 6 bindings, the horizontal parts of which are pulled together by pins 7.
  • the design of the transformer is a unified design.
  • this ratio significantly affects the weight and size characteristics of the transformer, the weight of the yokes of which is half the weight of the rods.
  • the fourth technical result of this essential feature is the one hundred percent orientation of the cutting directions of the plates with the direction of rolling of cold-rolled steel, which significantly affects the reduction of losses and the improvement of the characteristics of the transformer.
  • the invention provides the presence in the claimed design of the transformer of a number of essential features that will lead to the emergence of new functions.
  • the more than five ratio of the height of the prism and the width of the beam of a six-beam star is the first such essential feature.
  • This ratio provides maximum coverage of the phase windings by the spatial magnetic system.
  • Let us turn to Fig. 11 and Fig. 10 which compare the pictures of the magnetic fields of the turn, covered by the spatial magnetic system ( Fig. 10 ) and the turn, which covers the rod of a flat E-shaped magnetic conductor ( Fig. 11 ).
  • the Second case ( Fig.
  • the product nE 1 means the presence of only one tenseness component of the same amplitude and frequency.
  • the feature more than five regarding the ratio of the height of the prism and the width of the beam of a six-beam star is significant, since it fundamentally affects the technical result, which consists in the absence of higher harmonics in the voltages of the transformer, regardless of the degree of saturation of the steel.
  • the technical result is to identify a new property of the transformer - to perform the functions of a filter of higher harmonics with simultaneously transmitting power.
  • Fig. 12 where the feature is a symmetrical six-beam star of rods with halves of the main and additional windings placed on them and surrounded by a hexagonal yoke.
  • the consequence of this feature is a physical phenomenon expressed by the electromagnetic interconnection of each phase with two neighbouring phases: phase A is magnetically connected to phases B and C, phase B - to phases A and C, phase C - to phases A and B.
  • the essence of voltage self-regulation is as follows: a change in the load current causes a change in the magnetomotive force (MMF) of the additional or control winding connected in series with the main winding.
  • MMF magnetomotive force
  • a change in the MMF will cause a change in the flux, which is adequate to a change in the EMF of the additional winding.
  • its EMF increases, with a decrease, it decreases.
  • the EMF of the main and additional windings are added, that is, the output voltage increases.
  • the EMF of the additional winding decreases, which will lead to a decrease in the output voltage.
  • the presence of additional windings in each phase of the transformer is an essential feature because it determines the technical result, which consists in identifying a new function that the transformer can perform - the possibility of independent self-regulation of secondary voltages when the load changes without any external intervention. Such a function is adequate to the function of a voltage stabilizer.
  • the patented transformers are produced in a dry version, that is, they do not need a forced cooling system (tank, oil, radiators, pumps, pipelines, etc.), due, firstly, to the good thermal conductivity of steel and heat removal by a hexagonal yoke and, secondly, due to the elimination by the transformer itself of the "voltage distortion", and, consequently, the overload of the windings with currents.
  • the obtained technical and economic indicators testify the creation of a transformer of a unified design with improved production technology, improved weight and size characteristics compared to the prototype, which combines the functions of a transformer with the functions of a higher harmonic filter, balancing device and voltage stabilizer.
  • the principle of operation of the transformer is known from literary sources, for example, Ivanov-Smolenskij A.V. Electric machines. Textbook for high schools in 2 volumes. M., 2004 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
EP21884125.2A 2021-04-19 2021-07-21 Transformateur triphasé Pending EP4102522A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UAA202102030 2021-04-19
PCT/UA2021/000065 WO2022225498A1 (fr) 2021-04-19 2021-07-21 Transformateur triphasé

Publications (2)

Publication Number Publication Date
EP4102522A1 true EP4102522A1 (fr) 2022-12-14
EP4102522A4 EP4102522A4 (fr) 2023-09-27

Family

ID=89119680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21884125.2A Pending EP4102522A4 (fr) 2021-04-19 2021-07-21 Transformateur triphasé

Country Status (2)

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EP (1) EP4102522A4 (fr)
WO (1) WO2022225498A1 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB994898A (en) * 1962-03-13 1965-06-10 John Anders Gulow Improvements in three phase transformer core structure
SU1714697A1 (ru) 1989-03-20 1992-02-23 Производственное Объединение "Прожектор" Пространственный магнитопровод
RU2041515C1 (ru) * 1992-12-28 1995-08-09 Геннадий Александрович Кривоносов Электромагнитное устройство кривоносова
WO2005027155A1 (fr) * 2003-09-17 2005-03-24 Vijai Electricals Limited Procede de fabrication d'un transformateur triphase a structure centrale triangulaire et transformateur ^triphase possedant une structure centrale triangulaire
DE102005008302B4 (de) 2005-02-16 2010-09-02 Siemens Ag Transformatorkern mit magnetischer Abschirmung
UA79028C2 (en) * 2005-06-13 2007-05-10 Admiral Makarov Shipbuilding N Transformer-tranduser having tranverse magnetic bias with alternating current
UA84746C2 (uk) 2006-10-27 2008-11-25 Леонід Адамович Білий Трифазний трансформатор
EP2080717A1 (fr) 2008-01-21 2009-07-22 Philip Morris Products S.A. Récipient à couvercle articulé
ATE523887T1 (de) * 2008-05-13 2011-09-15 Abb Technology Ag Modularer ringkern
RU2422935C2 (ru) 2008-10-14 2011-06-27 Иван Яковлевич Сомов Составной трансформатор с саморегулированием напряжения под нагрузкой
RU2380780C1 (ru) 2008-12-10 2010-01-27 Открытое акционерное общество "Энергетический институт им. Г.М. Кржижановского" Пространственный симметричный магнитопровод
UA100077C2 (ru) 2011-04-20 2012-11-12 Национальный Университет Кораблестроения Имени Адмирала Макарова Магнитопровод для индукционого статического устройства
CA2942011A1 (fr) * 2014-03-21 2015-09-24 General Electric Company Appareil electromagnetique et procede de fourniture de ce dernier
JP6640898B2 (ja) * 2018-02-28 2020-02-05 ファナック株式会社 電磁機器
UA119130C2 (uk) * 2018-07-06 2019-04-25 Леонід Адамович Білий Трифазний трансформатор
CN111223646A (zh) * 2018-11-23 2020-06-02 杨玉岗 一种磁轭闭合型多相对称集成磁件

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Publication number Publication date
EP4102522A4 (fr) 2023-09-27
WO2022225498A1 (fr) 2022-10-27
WO2022225498A8 (fr) 2023-12-14

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