WO2022225498A1 - Transformateur triphasé - Google Patents

Transformateur triphasé Download PDF

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Publication number
WO2022225498A1
WO2022225498A1 PCT/UA2021/000065 UA2021000065W WO2022225498A1 WO 2022225498 A1 WO2022225498 A1 WO 2022225498A1 UA 2021000065 W UA2021000065 W UA 2021000065W WO 2022225498 A1 WO2022225498 A1 WO 2022225498A1
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WO
WIPO (PCT)
Prior art keywords
transformer
windings
magnetic
magnetic system
yoke
Prior art date
Application number
PCT/UA2021/000065
Other languages
English (en)
Russian (ru)
Other versions
WO2022225498A8 (fr
Inventor
Леонид Адамович БИЛЫЙ
Original Assignee
Леонид Адамович БИЛЫЙ
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 Леонид Адамович БИЛЫЙ filed Critical Леонид Адамович БИЛЫЙ
Priority to EP21884125.2A priority Critical patent/EP4102522A4/fr
Publication of WO2022225498A1 publication Critical patent/WO2022225498A1/fr
Publication of WO2022225498A8 publication Critical patent/WO2022225498A8/fr

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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
    • H01F27/24—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 the event of an unbalanced load, independently regulate smoothly and over a wide range voltage when the load changes, devices with significantly higher reliability and service life.
  • 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 with a magnetic circuit, while such metamorphoses as the need to replace the bulk field with a plane-parallel one, the scattering of this field into the surrounding space and etc., but the manufacture of a spatial magnetic circuit requires a larger amount of steel.
  • Three-phase spatial radial magnetic cores of increased compactness are known, the rods and yokes of which are formed from two groups of herringbone elements, which have different lengths, and part of the sections
  • the yoke is made of parallelogram-shaped elements with angles of 60° and 120° (Patent of Ukraine for invention UA 100077 ⁇ 2, Patent of Ukraine for utility model UA 99327).
  • Such magnetic circuits have a number of disadvantages, among which the main ones are: the impossibility of installing separately manufactured windings on the magnetic circuit rods, since the rods have a geometry “in the form of a chevron of various lengths”. Winding the winding on the finished magnetic circuit greatly complicates the technological process of manufacturing the transformer.
  • a spatially symmetrical magnetic circuit having 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 N "2380780 Cl).
  • Such magnetic circuits with spatial arrangement of rods only eliminate the magnetic asymmetry of planar W-shaped cores, and the technical result in reducing losses in steel is achieved only through the use of amorphous steel, which can also be achieved in a W-shaped magnetic circuit. Due to the low mechanical strength of amorphous steel (brittle like glass), special requirements are imposed on the designs of such cores and the conditions for their production, since the magnetic circuit is a supporting structure that holds the entire active part.
  • Amorphous steel does not allow excessive weight loading, which the inventors do not take into account. It is also known to design a magnetic core with an inner part (rods) made of a soft magnetic material, around which a screen is at least partially located, which has a laminated structure of at least one soft magnetic material, and between the inner part of the magnetic core and the screen there is a device for creating axial pressure on the inner part of the magnetic circuit, and the screen is divided into segments and its length in the axial direction is equal to or greater than the axial length of the coil frames located around the transformer magnetic circuit (Patent of Ukraine for the invention UA N ° 88942 C2).
  • a three-phase transformer which contains low and high voltage windings in each phase and a folded magnetic system, characterized 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 , on three rods through one there are phase windings as part of the primary and secondary windings of one phase, the other three rods are free from windings and are shunt, on each of the six sections of the yoke there is an additional bias winding, two for each phase, which are located in different side of the respective phase 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 characterized in that the magnetic system is made in the form of a cylinder, the cross section of which is a six-beam star of rods, covered by an annular yoke.
  • Three-phase transformer according to claim 1 characterized 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.
  • the magnetic system consists of a six-beam star rods with spatial angles of 60°, covered by a six-sided yoke.
  • the prototype has a number of disadvantages, the main of which are:
  • cold-rolled electrical steel is characterized by anisotropy, that is, different magnetic properties along and across rolling.
  • anisotropy that is, different magnetic properties along and across rolling.
  • stamping plates according to FIG. 6 - fig. 11 or FIG. 17 - fig. 22 takes place only in one or two rods, and in four or five rods the magnetic losses increase significantly.
  • the magnetic flux of the rod is closed by two yokes, that is, at the junction of the rod with the yokes, the flux is bifurcated in half due to equality of magnetic conductivities of both yokes. Therefore, the flow of the yokes is half the flow of the rod, and therefore the cross-sectional areas of the yokes and the rod must be appropriate. With serial production, the savings in steel due to a halving of the cross-sectional area of the yokes will be noticeable.
  • the objective of the invention is to improve the production technology and reduce the weight and size characteristics of a spatial magnetic circuit 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 the main primary and secondary windings, a spatial magnetic system composed of electrical steel plates, the magnetic system is formed by six regular trihedral prisms connected to each other by a common edge, thus forming a hexagonal prism with a six-beam star in cross section, the adjacent faces of the star are the cores of the magnetic circuit, and the autonomous faces are the hexagonal yoke, the vertical density of the magnetic circuit plates is provided by the central and side fastening, the main windings are divided in half and additional windings placed phase by 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.
  • Three-phase transformer according to claim 1 characterized in that the main and additional windings are placed together on rods with a spatial angle of 120°.
  • FIG. 1 shows a general view of the transformer.
  • FIG. 2 shows the geometry of a plate of a unified magnetic circuit.
  • FIG. 3 and 4 shows the stacking of magnetic circuit plates in two successive layers.
  • m In FIG. 5 shows a regular trihedral prism.
  • FIG. 6 shows the marking of a sheet of electrical steel for laser cutting of magnetic circuit plates.
  • FIG. 7 shows a cross section of a magnetic circuit composed of six trihedral prisms.
  • FIG. 8 shows the side mounting of the magnetic circuit.
  • FIG. 9 shows the central fastening of the magnetic core.
  • FIG. 10 shows a winding coil covered by a spatial magnetic circuit (the yoke is removed).
  • FIG. 11 shows a winding coil that covers the core of the magnetic core.
  • FIG. 12 shows a diagram of the relationship of the magnetic fluxes of the phases of the transformer.
  • FIG. 14 shows the electrical connection diagram of the main and additional windings of a three-phase transformer.
  • FIG. 13 shows the electrical connection diagram of the main and additional windings of one phase of the transformer.
  • a three-phase transformer (figure 1) contains primary and secondary (main) windings 3 and additional windings 4, the transformation ratio of which is greater than the main ones, a folded magnetic system (figure 1 pos. 1,2).
  • the spatial magnetic system is formed by six regular trihedral prisms (Fig. 5), made by stacking plates (Fig. 2) into successive layers (Fig. 3, fig. 4) and connected by a common edge.
  • the adjacent faces of the prisms serve as rods 1
  • the autonomous faces serve as yokes 2.
  • the magnetic circuit is made of plates of electrical steel, Fig. 2 with a thickness of 0.27 mm, 0.35 mm or from amorphous steel strips with a thickness of 10-30 microns.
  • the vertical density of the plates of the magnetic core is carried out by the central 5 and side 6 fasteners, the horizontal parts of which are pulled together by studs 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 for 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 first such essential feature is the ratio of the height of the prism and the width of the beam of a six-pointed star to more than five. This ratio provides maximum coverage of the phase windings by the spatial magnetic system.
  • Fig. 11 and FIG. 10 compares the pictures of the magnetic fields of the coil covered by the spatial magnetic system (Fig. 10) and the coil that covers the rod of a flat W-shaped magnetic circuit (Fig. 11).
  • the second case Fig.
  • the turn voltage of FIG. 10 ⁇ um n E1 t1G IM has only the first harmonic and there are no higher harmonics in it.
  • the total tension consists of the terms of the intensities of the segments of the coil, different in amplitude and frequency, that is
  • the feature regarding the ratio of the height of the prism and the width of the beam of a six-pointed star is more than five 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 steel saturation.
  • the technical result is to identify a new property of the transformer - to perform the functions of a filter of higher harmonics while simultaneously transmitting power.
  • additional windings 4 allows for smooth and in a wide range of self-regulation of secondary voltages when the load changes by connecting the main and additional windings in series according to the diagrams shown in Fig. 13 for one phase and in FIG. 14 for three phases.
  • 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 entail 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, there is an increase output voltage.
  • 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 transformers claimed by the patent 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 imbalance”, and, consequently, the overload of the windings with currents.
  • the obtained technical and economic indicators indicate the creation of a transformer 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-Smolensky A.V. Electrical machines, in 2 volumes Textbook for universities. - M Ed. MPEI. - 2004.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

L'invention se rapporte au domaine du génie électrique, notamment à la construction de transformateurs, et peut être utilisée dans tous les domaines où des processus de production sont liés à la fabrication, l'exploitation et la réparation de transformateurs. Ce transformateur triphasé comprend des enroulements primaire et secondaire principaux (3), un système magnétique tridimensionnel assemblé à partir de plaques en acier électrotechnique, et formé par six prismes trièdres droits connectés entre eux par une arête commune de manière à former un prisme hexaèdre avec une étoile à six branches dans la section. Les faces adjacentes de l'étoile consistent en des tiges (1) d'un conducteur magnétique, et celles libres forment un pont hexaèdre (2); la densité verticale des plaques est assurée par des fixations centrale (5) et latérales (6). Des enroulements principaux et des enroulements supplémentaires sont divisés en deux et sont agencés par phase sur les tiges selon un angle de 60° dans l'espace. Le système magnétique est réalisé selon un rapport entre la largeur de la tige et la largeur du pont égal à deux et un rapport entre la hauteur d'une tige et la largeur d'une branche de plus de cinq. Le résultat technique de l'invention consiste en une unification de la structure du système magnétique tridimensionnel, une diminution de ses caractéristiques de masse et de taille, une combinaison dans le transformateur des fonctions de filtre d'harmoniques élevées, de dispositif de symétrie et de stabilisateur de tension.
PCT/UA2021/000065 2021-04-19 2021-07-21 Transformateur triphasé WO2022225498A1 (fr)

Priority Applications (1)

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

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
UAA202002030 2021-04-19
UAA202102030 2021-04-19
UAA202102030 2021-04-19

Publications (2)

Publication Number Publication Date
WO2022225498A1 true WO2022225498A1 (fr) 2022-10-27
WO2022225498A8 WO2022225498A8 (fr) 2023-12-14

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EP (1) EP4102522A4 (fr)
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Citations (12)

* 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
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
UA88942C2 (xx) 2005-02-16 2009-12-10 Сименс Акциенгезэльшафт Магнітопровід трансформатора$магнитопровод трансформатора
RU2380780C1 (ru) 2008-12-10 2010-01-27 Открытое акционерное общество "Энергетический институт им. Г.М. Кржижановского" Пространственный симметричный магнитопровод
RU2422935C2 (ru) 2008-10-14 2011-06-27 Иван Яковлевич Сомов Составной трансформатор с саморегулированием напряжения под нагрузкой
UA99327C2 (ru) 2008-01-21 2012-08-10 Филип Моррис Продактс С.А. Упаковка с откидной крышкой
UA100077C2 (ru) 2011-04-20 2012-11-12 Национальный Университет Кораблестроения Имени Адмирала Макарова Магнитопровод для индукционого статического устройства
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
BRPI0822691A2 (pt) * 2008-05-13 2015-07-07 Abb Technology Ag Núcleo em forma de anel modular
MX2016012189A (es) * 2014-03-21 2017-01-05 Gen Electric Aparato electromagnetico y metodo para proporcionar el mismo.
JP6640898B2 (ja) * 2018-02-28 2020-02-05 ファナック株式会社 電磁機器

Patent Citations (12)

* 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
UA88942C2 (xx) 2005-02-16 2009-12-10 Сименс Акциенгезэльшафт Магнітопровід трансформатора$магнитопровод трансформатора
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
UA99327C2 (ru) 2008-01-21 2012-08-10 Филип Моррис Продактс С.А. Упаковка с откидной крышкой
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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4102522A4

Also Published As

Publication number Publication date
EP4102522A1 (fr) 2022-12-14
EP4102522A4 (fr) 2023-09-27
WO2022225498A8 (fr) 2023-12-14

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