WO2019147212A1 - Stator de pompe submersible électrique et procédé de fabrication correspondant - Google Patents

Stator de pompe submersible électrique et procédé de fabrication correspondant Download PDF

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Publication number
WO2019147212A1
WO2019147212A1 PCT/UA2018/000073 UA2018000073W WO2019147212A1 WO 2019147212 A1 WO2019147212 A1 WO 2019147212A1 UA 2018000073 W UA2018000073 W UA 2018000073W WO 2019147212 A1 WO2019147212 A1 WO 2019147212A1
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WO
WIPO (PCT)
Prior art keywords
stator
coils
elements
linear
star
Prior art date
Application number
PCT/UA2018/000073
Other languages
English (en)
Russian (ru)
Inventor
Дмитрий Валерьевич ХАЧАТУРОВ
Original Assignee
Дмитрий Валерьевич ХАЧАТУРОВ
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 Дмитрий Валерьевич ХАЧАТУРОВ filed Critical Дмитрий Валерьевич ХАЧАТУРОВ
Publication of WO2019147212A1 publication Critical patent/WO2019147212A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors

Definitions

  • the invention relates to the field of electrical engineering, in particular, to the design of linear electric motors used in electric submersible pumping installations in the oil industry.
  • the principle of operation of the known linear electric submersible pumping units is based on the reciprocating movement of the movable part of the linear motor connected to the plunger of the pump unit, under the influence of a traveling electromagnetic field created in the stator winding of the electric motor.
  • the stator is made in the form of a set of circular inductors installed around the guide moving part of a linear electric motor.
  • Such a constructive implementation requires reliable fixation of the coils ensuring their constant and accurate positioning, both relative to each other and relative to the elements of the moving part of the linear electric motor, thus ensuring a constant pole separation of the stator and uniform distribution of magnetic induction in the linear electric motor.
  • one of the main requirements for the operation of electric motors is to increase the efficiency, smoothness of movement and efficiency.
  • This result is achieved through the use of combined windings, at the moment the most famous winding of this type is "Slavyanka".
  • This winding scheme implies a parallel connection of two three-phase windings into a star and a triangle. Thanks to the combined windings, the parameters of the engines are significantly improved, in particular, energy efficiency is increased, and the use of expensive electrical materials is reduced.
  • the disadvantages of the described technical solution include the method of fixing the inductance coils by means of heat-shrinkable material, which does not ensure sufficient accuracy of positioning the stator coils relative to each other, and can also lead to a change in the position of the coils during operation under the influence of significant temperatures.
  • a synchronous rotating electric machine with combined windings which includes a six-phase winding consisting of two three-phase combined windings connected respectively to a star and a triangle with a ratio of the numbers of turns of a triangle and a star equal to l / 3, with each phase having an equal number of teeth, coils of different phases are laid in different grooves so that the resulting magnetic flux induction vectors of each of the adjacent phases form an angle between themselves 30 e. degrees Odd phases are connected into a star, and even - into a triangle or vice versa, and the conclusions of their phases, separated from each other by 30 el. degrees are interconnected and form the connection points of the phases.
  • the stator of the motor of a submersible pumping unit which contains many coils and spacers between them, wound from one conductor of a certain length, with alternating three specified sets of coils with different current directions.
  • the ends of the stator winding are connected to the star at the end of the last set of coils.
  • the number of coils in each set is a multiple of three.
  • each set of coils contains a plurality of coils forming adjacent pairs, one of the pair of coils being wound in the opposite direction with respect to the other of the coils of the pair.
  • the engine described in this embodiment of the invention is low-speed, since, according to the description, the number of pairs of stator poles exceeds the number of pairs of poles of the movable part (slider).
  • the disadvantages of the described technical solution include the fact that when the windings are connected to a star or a triangle, the magnetic field of the winding is not sinusoidal and has a stepped form of the curve magnetomotive force (MDS), when powered from a source of sinusoidal voltage, which leads to the modulation of the slider pull and causes unwanted acoustic noise and vibration of the engine due to electromagnetic forces.
  • MDS curve magnetomotive force
  • the disadvantages of the described technical solution include the use of fastening elements installed between the stator sections, which can affect the accuracy of the positioning of the stator elements, as well as the implementation of the stator with comb elements significantly increases the metal structure and complicates the manufacturing technology.
  • the technical problem to which the invention is directed is to improve the operational characteristics of a linear valve motor with a stable traction force with accurate positioning of the stator structural elements regardless of thermal expansion and mechanical load.
  • the technical result obtained from the implementation of the claimed invention is to increase the traction force, increase the output torque of the motor, ensuring the sinusoidal curve of the magnetomotive force (MDS), as well as improving the accuracy of positioning the stator design elements relative to the moving part of the motor regardless of the relative thermal expansion and mechanical stress. Also the implementation of the technical solution helps to reduce the number of structural elements, improving the manufacturability.
  • the structural elements of the stator are made of a material with a relative temperature expansion equal to the temperature expansion of the elements of the moving part of a linear electric motor.
  • Stator sections made in the form of a frame structure formed from C-shaped transverse ferromagnetic elements (spacers) with radial protrusions. These elements are connected by sectional and intersectional guides mounted in the axial direction and made with the possibility of providing a constant value of pole division and precise positioning of the stator elements relative to each other.
  • Sectional and intersectional guides are made in the form of perforated plate strips installed in engagement with the radial protrusions of C-shaped transverse ferromagnetic elements (spacers) with fixation by means of periodically installed locking elements.
  • C-shaped supporting elements (spacers) are made with a transverse slit, which is made with a gradual transition along the arc and during the formation of the stator sections forms a longitudinal groove for laying the connected ends of the coils.
  • the stator winding contains a set of coils placed between the C-shaped transverse elements (spacers) of the stator sections, combined into groups with an equal number of coils. Coils are placed in groups, taking into account alternating changes in the direction of the current within one group.
  • the stator winding is a part of the magnetic system, in which the number of stator teeth differs from the number of magnetic poles of the moving part of the linear actuator by a multiple of two, forming the resulting magnetic field with the number of magnetic poles of the stator equal to the number of magnetic poles of the moving part.
  • Coils in groups are arranged in pairs with alternating connections in a star and a triangle, forming in each pair an angle between the magnetic flux induction vectors 90 el. degrees, however, groups of coils related to one phase are shifted relative to the groups of coils belonging to other phases by 120 e. degrees
  • the stator winding is nine-phase with the same number of teeth per phase and consists of three three-phase windings, connected in parallel two of which are connected in a star and one in a triangle.
  • At least two coils represent one phase and form one pole, one of the indicated pair of coils is connected to a star, and the second to a triangle with similar coils of other phases, each pair of coils in the group having reverse polarity with respect to previous.
  • a method of manufacturing a stator in accordance with the claimed design consists in that the stator is made of sections, the structural elements of which are made of a material with a relative temperature expansion equal to the temperature expansion of the elements of the moving part of a linear electric motor.
  • the stator sections are made in the form of a frame structure formed from C-shaped transverse ferromagnetic elements with radial protrusions, as well as sectional and intersection guides. Between C-shaped transverse elements, a set of coils is installed, which are combined into groups arranged with regard to alternating changes in the direction of the current within one group. Coils in groups form in pairs with alternating connections in a star and a triangle, forming in each pair the angle between the magnetic flux induction vectors 90 el. degrees Groups of coils belonging to the same phase are shifted relative to the groups of coils belonging to other phases by 120 el. degrees
  • stator winding is made of three three-phase windings connected in parallel, two of which are connected in a star and one in a triangle.
  • figure 1 linear electric submersible pumping unit
  • FIG. 1 stator linear electrophoreses pumping unit, General view;
  • fig.Z stator electric submersible pumping unit in the section;
  • FIG. 6 is a diagram of a stator winding of an electro-submersible pumping installation
  • Fig.7 the curve of the magnetomotive force (MFS) in a nonmagnetic gap.
  • the claimed invention is implemented in the design of a linear electrophoreses pump installation of modular design, which contains ground 1 (figure 1) and submersible 2 parts.
  • the ground part is presented in the form of a control unit 3, made in the form of a three-phase high-frequency inverter-regulator and an output transformer connected to a linear valve motor 4 by a cable line 5.
  • the load part 2 (figure 1) contains a linear valve motor 4 including a stator 6 (figure .2) which is made of a set of sections 7. Sections 7 of the stator are formed from around the hollow guide 8 (FIG.
  • stator winding includes a spatially combined composition of three-phase interdependent parts (windings) assembled into a star and a triangle.
  • structural elements of the stator are made of a material with a relative temperature expansion equal to the temperature expansion of the elements of the moving part of a linear electric motor.
  • This embodiment allows for accurate positioning of the stator elements relative to the moving part of the linear motor (slider), so that the total temperature expansion does not affect the ratio of the geometric dimensions of the stator and slider elements, ensuring the stability of the traction force over a wide temperature range.
  • Section 7 of the stator is made in the form of a frame structure formed from C-shaped transverse ferromagnetic elements (spacers) 10 with radial protrusions 12, as well as sectional 13 and intersectional 14 guides mounted around the circumference of the stator in the axial direction.
  • Guides 13,14 are made with the possibility of providing a constant value of pole division and accurate positioning of the stator elements relative to each other.
  • the guides 13,14 are presented in the form of plate-like perforated elements installed in engagement with radial protrusions 12 C-shaped transverse ferromagnetic elements (spacers) 10, fixed by means of periodically installed locking elements 15.
  • the first guides 14 can be realized, both in the form of separately installed perforated plates (FIG. 1), and in the form of sectional guides 13, mounted between adjacent sections (not shown in the pictures).
  • C-shaped transverse ferromagnetic spacers 10 are made with a transverse slit 16, with a gradual transition along the arc and forming stator sections form a longitudinal groove for laying the connected ends of the coils 1 1.
  • Each section of the stator contains at least one group 17; 17 P (figure 2), formed from a pair of coils 11; 11 p , separated by a ferromagnetic spacer 10; 10 P. At least one of the pair of coils 11 of at least one group 17 of the first section 7, relating to one of the phases, is connected to the coils 11 n in the corresponding group 17 n of the following section 7 P , relating to the other phases, by connecting a star or a triangle, providing alternation and spatial phase shift of the supply voltage.
  • the stator winding (FIG. 6) is made of three three-phase windings, connected in parallel two of which are connected to a star (shown in the diagram by a solid line in the form of trapezoids with different line widths for each phase) and one in a triangle (the diagram is shown by a dashed line in the form of rectangles, with different thickness of lines for each phase).
  • the stator winding contains a set of coils 11 placed between C-shaped transverse elements 10 sections 7 of the stator and grouped into groups 17 with an equal number of coils placed with regard to alternating changes in the direction of current within one group.
  • the described winding and slider (in Fig. 6, shown as alternatingly arranged magnets with poles "S", "N") form a magnetic system in which the number of stator teeth differs from the number of magnetic poles of the moving part of a linear electric motor by a multiple of two, forming resulting magnetic field with the number of stator magnetic poles equal to the number of magnetic poles of the movable part.
  • Coils in groups arranged in pairs with alternating connections in a star and a triangle. In each pair of coils, the angle between the magnetic flux induction vectors is 90 el. degrees, while the groups of coils belonging to one phase are shifted relative to the groups of coils belonging to other phases by 120 el. degrees
  • At least two coils represent one phase and form one pole, with one of the specified pair of coils connected in a star, and the second in a triangle with similar coils of other phases. Also, each pair of coils in a group has reverse polarity with respect to the previous pair.
  • the displacement of the windings connected in a star relative to the windings connected in a triangle leads to the creation of a pulsating magnetic field in each tooth, while the summing vector of the maximum magnetic flux moves sequentially along the teeth of the stator.
  • the magnetic field created by the permanent magnets of the slider is carried along by the magnetic field vector, which is created by the stator winding, creating a driving moment acting on the moving part of the electric motor.
  • the voltage is applied to the stator windings so that the magnetic field vector of the stator is always equal to the magnetic field vector of the slider.
  • PWM pulse width modulation
  • the controller controls the current flowing through the stator windings of the motor, i.e. the magnetic field vector of the stator, and thus adjusts the moment acting on the slider.
  • the control is implemented in such a way as to create and maintain a running magnetic field in the gap between the stator and the slider, which carries the slider.
  • stator in the form of a frame sectional construction provides manufacturability of the assembly and contributes to improving the accuracy of positioning the stator structural elements relative to the elements of the moving part of the electric motor regardless of the relative temperature expansion and mechanical stress.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Linear Motors (AREA)

Abstract

L'invention appartient au domaine des équipements électriques et notamment de la structure de moteurs électriques linéaires utilisés dans des installations de pompes immergées et notamment en industrie pétrolière. L'invention consiste en ce que les éléments constitutifs du stator sont réalisés à partir d'un matériau ayant une dilatation thermique égale à celle d'éléments de la partie mobile d'une partie de moteur électrique linéaire. Les sections du stator sont réalisées sous la forme d'une structure formée à partir d'éléments transversaux ferromagnétiques en C (inserts) avec des saillies radiales. Ces éléments sont connectés entre eux par des guides sectionnels et intersectionnels montés dans une direction axiale et réalisés de manière à permettre d'assurer une valeur constante de la séparation des pôles et du positionnement de précision des éléments du stator les uns par rapport aux autres.
PCT/UA2018/000073 2018-01-25 2018-07-11 Stator de pompe submersible électrique et procédé de fabrication correspondant WO2019147212A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
UAU201800723 2018-01-25
UAU201800723 2018-01-25
UAA201802835 2018-03-20
UAA201802835 2018-03-20

Publications (1)

Publication Number Publication Date
WO2019147212A1 true WO2019147212A1 (fr) 2019-08-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130038144A1 (en) * 2011-08-11 2013-02-14 Alan Charles McAleese Modular stator for tubular electric linear motor and method of manufacture
RU2582332C1 (ru) * 2014-12-30 2016-04-27 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Цилиндрический линейный асинхронный двигатель
WO2017074213A1 (fr) * 2015-10-30 2017-05-04 Центр Разработки Нефтедобывающего Оборудования Stator d'un moteur électrique linéaire immergé et procédé de son assemblage
RU179910U1 (ru) * 2018-01-25 2018-05-29 Дмитрий Валерьевич Хачатуров Статор линейной электропогружной насосной установки

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130038144A1 (en) * 2011-08-11 2013-02-14 Alan Charles McAleese Modular stator for tubular electric linear motor and method of manufacture
RU2582332C1 (ru) * 2014-12-30 2016-04-27 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Цилиндрический линейный асинхронный двигатель
WO2017074213A1 (fr) * 2015-10-30 2017-05-04 Центр Разработки Нефтедобывающего Оборудования Stator d'un moteur électrique linéaire immergé et procédé de son assemblage
RU179910U1 (ru) * 2018-01-25 2018-05-29 Дмитрий Валерьевич Хачатуров Статор линейной электропогружной насосной установки

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