RU2037223C1 - Electric reactor with superposed magnetization - Google Patents

Abstract

FIELD: electrical engineering electric power engineering. SUBSTANCE: electric reactor with superposed magnetization includes coils of main winding, coils of control winding with anchoring members and magnetic system with rods and yokes. Rods of magnetic system are fabricated in the form of individual armored cores with central rods, windows and side yoke placed orthogonally to axes of coils of main winding. Central rods of armored cores carry coils of control winding and cores proper are isolated from yokes by nonmagnetic gaps. Each coil of control winding is manufactured on the basis of graphite in the form of open turn with plated ends fixed relative to each other by means of anchoring members. Front parts of turns have cross-section lying within limits specified in description of invention. EFFECT: reduced losses, improved cooling conditions, decreased usage of active materials. 3 cl, 5 dwg

Description

 The invention relates to electrical engineering and energy, in particular to electric induction devices with smooth regulation of inductance by magnetization.

A known design of an electric reactor controlled by transverse magnetization, containing the main windings and a magnetic system with rods made in separate sections, each of which consists of two contacting ferromagnetic cylinders covered by a section of the control winding in the area of their contact, and the frontal sections of the sections are located inside the ring ferromagnetic inserts [1]
The disadvantages of this design are the large relative losses in the control winding from the control current, large additional losses from the scattering fluxes and increased consumption of active materials.

Also known is the design of an electric magnetization reactor containing coils of the main winding, control winding coils with fasteners, and a magnetic system with rods and yokes, the magnetic system rods being made as separate armored cores with central rods, windows and side yokes located orthogonal to the axes coils of the main winding, control coil coils are placed on the central rods of the armored core cores, and the cores themselves are separated from the yoke by a non-magnet clearances [2]
This design in its essence and the achieved result is closest to the claimed invention
Its disadvantages are also large losses in the control winding from the control current, large additional losses in the control winding from scattering fluxes, insufficient cooling conditions of the control winding sections located in the windows of the armored cores, as well as increased consumption of active materials.

 The aim of the invention is to reduce losses, improve cooling and reduce the consumption of active materials.

(0,91÷0,75)

1-

, а линейный геометрический размер стороны бронестержневого сердечника определяется выражением
a (2,12-2,53)10

, где Q_н [B˙A] задаваемая номинальная мощность реактора при максимальном подмагничивании;
B_m,o [Тл] задаваемая электромагнитная индукция;
I_у [А/мм²] задаваемая плотность тока в обмотке управления;
ω [с^-1] угловая частота;
К_р задаваемая глубина регулирования;
К_с коэффициент заполнения сталью геометрического сечения бронестержневого сердечника;
К_у коэффициент заполнения окна бронестержневого сердечника обмоткой управления;
α угол, определяемый из выражения
sin

1-

=

.To ensure the achievement of this goal in an electric reactor with magnetization, containing the main winding coil, control winding coil with fasteners, and a magnetic system with rods and yokes, the magnetic system rods made in the form of separate armored cores with central rods, windows and side yokes, orthogonal to the axes of the coils of the main winding, on the central rods of the armored core are placed control coil coils, and the cores themselves They are separated from the yokes by non-magnetic gaps, each coil of the control winding is made on the basis of graphite in the form of a single C-shaped coil in plan view with metallized ends fixed with respect to each other by fasteners, and the frontal parts of the coil are made with a cross section within
S _ok <S _forehead <S _segment , where S _ok section of the window core armor;
S _{forehead is a} cross section of the frontal part of the coil of the control coil;
S _{segment is a} cross section of a segment formed by the inner surface of the main winding and the plane of the armored core; each coil of the control winding is equipped with cooling channels made at an angle to the plane of the coils, in the area of the coil sections located in the windows of the armored cores; the ratio of the products of the number of turns per section of the wire of the main winding to the number of turns per section of the wire of the control winding of the reactor rod is determined by the expression

(0.91 ÷ 0.75)

1-

, and the linear geometric dimension of the side of the armored core is determined by the expression
a (2.12-2.53) 10

where Q _n [B˙A] is the set rated power of the reactor at maximum magnetization;
B _{m, o} [T] specified electromagnetic induction;
I _y [A / mm ² ] set current density in the control winding;
ω [s ^-1 ] angular frequency;
To _{p the} set depth of regulation;
K _with coefficient of filling with steel of the geometric cross section of the armored core;
K _u the fill factor of the window armored core control winding;
α angle determined from the expression
sin

1-

=

.

 In FIG. 1 shows the proposed reactor, General view; figure 2 and 3 versions of the electric reactor with magnetization with a different shape of the frontal parts of the turns of the coils of the control winding; in Fig.4 node I in Fig.1; figure 5 section aa in figure 4.

(0,91-0,75)

1-

, а линейный геометрический размер стороны бронестержневого сердечника 5 определяется выражением
a (2,12-2,53)10

, где Q_н [B˙A] задаваемая номинальная мощность реактора при максимальном подмагничивании;
B_m,o [Тл] задаваемая электромагнитная индукция;
I_у [А/мм²] задаваемая плотность тока в обмотке управления;
ω [с^-1] угловая частота;
К_р задаваемая глубина регулирования;
К_с коэффициент заполнения сталью геометрического сечения бронестержневого сердечника;
К_у коэффициент заполнения окна бронестержневого сердечника обмоткой управления;
α угол, определяемый из выражения
sin

1-

=

.An electric magnetization reactor contains coils of the main winding 1, coils of the control winding 2 with fasteners 3, and a magnetic system with rods and yokes 4, and the rods of the magnetic system are made in the form of separate armored rods 5 with central rods, windows and side yokes located orthogonally to the axes of the coils of the main winding 1, on the central rods of the armored core cores are placed the coils of the control winding 2, and the cores 5 themselves are separated from the yokes 4 by non-magnetic gaps, each the carcass of the control winding is made on the basis of graphite in the form of a single C-shaped turn in terms of the shape of FIGS. 2 and 3 with metallized ends 6 fixed to each other by fasteners 3, and the frontal parts of the turn are made with a cross section within
S _ok <S _forehead <S _segment , where S _ok section of the window of the armored core 5;
S _forehead cross section of the frontal part of the coil of the coil of the winding 2;
S _{segment is a} cross section of a segment formed by the inner surface of the main winding 1 and the plane of the armored core 5, each coil of the control winding 2 is equipped with cooling channels 7 of FIGS. 4 and 5, made at an angle to the plane of the coils, in the area of the sections of the coils located in the windows of the armored 5 cores; the ratio of the products of the number of turns per section of the wire of the main winding 1 to the number of turns per section of the wire of the winding 2 of the control of the reactor core is determined by the expression

(0.91-0.75)

1-

, and the linear geometric dimension of the side of the armored core 5 is determined by the expression
a (2.12-2.53) 10

where Q _n [B˙A] is the set rated power of the reactor at maximum magnetization;
B _{m, o} [T] specified electromagnetic induction;
I _y [A / mm ² ] set current density in the control winding;
ω [s ^-1 ] angular frequency;
To _{p the} set depth of regulation;
K _with coefficient of filling with steel of the geometric cross section of the armored core;
K _u the fill factor of the window armored core control winding;
α angle determined from the expression
sin

1-

=

.

 The described device operates as follows.

The main winding 1 of the reactor is connected to an AC voltage source. The control winding 2 is connected to a direct current source, the value of which can be changed from zero to a nominal value. When the current in the control winding 2 changes, the current value in the main winding 1 changes, thereby controlling the reactive power of the reactor within Q _o ≅ Q _reg, Q _n , where Q _{o is the} minimum reactive power determined by the magnitude of non-magnetic gaps in the magnetic system of the reactor. The rated power of the reactor Q _n corresponds to the rated current in the main winding. Moreover, if the sections of the coil (frontal parts) of the coil of the control winding are performed with a larger cross section than that of the sections of the coil passing in the windows of the armored cores, then the electrical resistance of the sections with a large cross section will be less, and therefore will be smaller and DC losses in the control winding.

 In addition, the implementation of the control coil coils on the basis of graphite with plastic additives with good electrical conductivity of the metal, for example, copper, will avoid additional losses from the scattering fields and buckling in the material of the control winding inherent in structures where the control winding is made, for example, only of copper or aluminum conductor.

 Improving the cooling of the device is ensured by the presence of control windings located in the windows of the armored cores and cooling channels in the winding sections.

 These sections of the minimum cross section have a maximum current density, which entails the operation of the coil section in the intense thermal regime. When performing channels in these sections of the channels at an angle to the plane of the coils, better circulation of the cooling medium, for example, oil, is achieved, which results in more intensive cooling of the control winding and improved cooling of the reactor as a whole.

 The choice of the ratio of the products of the number of turns and the cross sections of the main winding to the control winding, respectively, and the linear geometric size of the side of the armored core will create, in combination with the execution of the control winding of non-metallic material, the most economical design in terms of the consumption of active materials (steel, copper) with specified electromagnetic loads and coefficients.

 The numerical coefficients in both expressions characterize the range of the choice of the ratio of the cross sections of the central rods to the lateral yokes (lateral sections) of the armored cores, the first number corresponding to a ratio of 1.5, and the second 2.0.

Claims (3)

1. ELECTRIC REACTOR WITH MAGNETIZATION, comprising coils of the main winding, coils of the control winding with fasteners and a magnetic system with rods and yokes, the rods of the magnetic system made in the form of separate armored cores with central rods, windows and side yokes located orthogonally to the axes of the coils of the main windings, control coil coils are located on the central rods of the armored core cores, and the cores themselves are separated from the yokes by non-magnetic gaps, different t m, each control winding coil is formed on the basis of graphite in the form of an open loop with metallized ends fixed to each other by fasteners and the frontal portion of the coil formed with a cross section, S _{l b of} individuals within
S _{to about} <S _{l o b} <S _{with e g m,}
where S _{about to - the} cross-section of the window armored core;
S _{c r m e} cross section of the segment formed by the inner coil and the plane bronesterzhnevogo core.  2. The reactor according to claim 1, characterized in that each coil of the control winding is equipped with cooling channels made at an angle to the plane of the coils in the area of the coil sections located in the windows of the armored cores. 3. The reactor according to paragraphs. 1 and 2, characterized in that the ratio of the products of the number W of turns to the cross section of the wire of the main winding to the number of turns to the cross section S _{p p of the} wire of the control winding of the reactor rod is determined by the expression

and the linear geometric dimension of the side of the armored core is determined by the expression

where Q _{n is the} set rated power of the reactor at maximum magnetization, V · A;
B _{t , about the} set electromagnetic induction, T;
I _{y the} set current density in the control winding, A / mm ² ;
ω angular velocity, s ^{- 1} . K _{p the} set depth of regulation;
K _with fill factor with steel of the geometric cross section of the armored core;
K _{y the} coefficient of filling the window armored core control winding;
a angle determined from the expression