RU16884U1 - MAGNET WIRE - Google Patents

Abstract

1. A magnetic core made of a magnetically soft amorphous alloy twisted from a tape containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%: Iron - 1.65-5. Sum of iron and manganese - 4- 8 Silicon - 2-8; Sum of silicon and boron - 16-24; Cobalt - The rest, while in the magnetic circuit, the B / ratio is greater than 0.9, where B is the residual magnetic induction, B is the magnetic induction at a magnetic field of 800 A / m, and a coating is applied over the magnetic circuit from polymeric material. 2. A magnetic core made of a coiled magnetically soft amorphous alloy containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%: Iron - 1.65-5; Sum of iron and manganese - 4-8 Silicon - 2-8Sum of silicon and boron - 16-24Cobalt - The rest of this, in the magnetic circuit, the ratio B / is greater than 0.9, where B is the residual magnetic induction, B is the magnetic induction at a magnetic field of 800 A / m, a coating of polymer material is applied over the magnetic circuit , and between the turns of the tape There is glue. 3. A magnetic core made of a coiled magnetically soft amorphous alloy containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%: Iron - 1.65-5; Sum of iron and manganese - 4-8 Silicon - 2-8 The sum of silicon and boron is 16-24Cobalt - the rest, while in the magnetic circuit, the ratio μ / μ is less than 1.15, where μ is the maximum relative magnetic permeability, μ is the initial relative magnetic permeability, and a coating of polymer material is applied over the magnetic circuit. 4. Magnetic core

Description

Belozerov oladimir Yakovlevich

Starodubtsev Yuri Nikolaevich

Zelenin Victor Alexandrovich

The utility model relates to the field of electrical engineering, in particular, to magnetic cores of transformers and reactors for various purposes. The invention relates to magnetic cores that are made of soft magnetic alloys having a high sensitivity of magnetic properties to heat treatment in a magnetic field. The purpose of the invention is a magnetic core made of a soft magnetic alloy with an amorphous structure, which after heat treatment in a longitudinal magnetic field (Fig. 1) has a high straight-line coefficient of the magnetic hysteresis loop Kp 0.9, and after annealing in a transverse magnetic field, the magnetic circuit has a low coefficient of squareness of the magnetic hysteresis loop Kp 0.05 or the ratio Tstah / Mn less than 1.15. In this case, Kp Vg / Bgoo where Vg is the residual magnetic induction, Bgoo is the magnetic induction at a magnetic field of 800 A / m, iimax is the maximum relative magnetic permeability, Tsn

- initial relative magnetic permeability.

One of the conditions for using a magnetic circuit in transformers and reactors is a low saturation magnetostriction. Low magnetostriction can be obtained in a magnetic circuit made of an alloy based on cobalt containing iron, manganese, silicon and boron. As a prototype, a magnetic circuit made of an amorphous alloy ribbon is selected, the composition of which is determined by the formula (Coi.x-y.zFexNiyMnz) ioo-a-b-cMaSibBc, where M

- at least one element from the group Nb, Cr, Mo, indices have the following meanings: 0 a 6, 13 b 16, 7 s 10, 0 x 0.1, 0 y 0.2, 0 z 0.13, 18 a + b + c 32, 18 b + c 30, with the squareness coefficient of the magnetic hysteresis loop in the magnetic circuit Br / BS 0.8, and BS 0.5 - 0.8 T.

. ,, ..., .-- :. „,. j. "

MAGNET WIRE

H01F3 / 04, C22C19 / 07

The degree of rectangularity of the magnetic hysteresis loop is closely related to the magnitude of the magnetic anisotropy constant Ks induced during thermomagnetic processing in a longitudinal magnetic field. Moreover, the higher the KU value, the greater Kp Br / Bgoo. To obtain a magnetic circuit with a high degree of rectangularity of the magnetic hysteresis loop Kp 0.9, it is proposed to use an alloy with an amorphous structure in which the iron content is in the range of 1.65-5 at%. This allows you to maintain a high level of magnetic induction. The total amount of iron and manganese should be 4–8 at%, so that the magnetostriction of the saturation is close to zero. To increase the induced magnetic anisotropy constant, the silicon content should be in the range of 2-8 at%. In total, silicon and boron should be 1624 at% in order to maintain a sufficiently high magnetic induction of saturation;

A magnetic core made of an amorphous ribbon of the proposed chemical composition has magnetostriction close to zero and a high constant of the induced magnetic anisotropy Kc. These factors reduce the sensitivity of the magnetic properties of the magnetic circuit to compressive stresses, which makes it possible to coat polymer materials on top of the magnetic circuit without noticeable deterioration of its magnetic properties. The coating of a polymer material not only gives additional rigidity to the magnetic circuit, but at the same time it is an insulating coating between the transformer windings and the magnetic circuit. Depending on the climatic and mechanical operating conditions of the transformer, as well as the permissible level of insulation voltage, various polymeric materials can be used: polypropylene, polyethylene, polystyrene, epoxy powder compositions and others with a coating thickness of 0.2 to 2 mm.

) ((gO 2 2c7

used to protect the magnetic circuit from mechanical deformation. The rejection of protective containers greatly expands the choice of sizes of magnetic cores. So for the manufacture of a protective container of a certain size, an individual mold is necessary. The coating is applied on the same equipment regardless of the size of the magnetic circuit.

Thus, we propose a magnetic circuit made of twisted tape of a magnetically soft amorphous alloy containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%: iron 1.65-5, the amount of iron and manganese 48, silicon 2-8, the sum of silicon and boron 16-24, cobalt - the rest, while in the magnetic circuit the ratio Br / Bgoo is more than 0.9, where BG is the residual magnetic induction, Bgoo is the magnetic induction at a magnetic field of 800 A / m, and a polymer coating is applied over the magnetic circuit material.

To increase the rigidity of the magnetic circuit, it is proposed to use a magnetic circuit, in which the inter-turn space is filled with hardened glue. The glue gives the magnetic circuit stiffness sufficient to withstand the compressive effect of the windings applied to the magnetic circuit in the manufacture of a transformer or reactor. The adhesive may be organic or inorganic. Thus, the next option is a magnetic core made of a magnetically soft amorphous alloy coil twisted from cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%: iron 1.65-5, the amount of iron and manganese 4-8, silicon 2-8, the sum of silicon and boron is 16-24, cobalt is the rest, while in the magnetic circuit the ratio Br / Bgoo is more than 0.9, where Br is the residual magnetic induction, Bgoo is the magnetic induction at magnetic fields 800 A / m, coated over the magnetic circuit from a polymeric material, and between the turns of the tape is glue.

g (g (22) A magnetic core made of an alloy with a component content providing a high constant of the induced magnetic anisotropy Kc, after annealing in a transverse magnetic field, has a low coefficient Kp of 0.05 and a ratio of the maximum magnetic permeability Tsah to the initial magnetic permeability Tsn close to unity. Therefore, it is proposed A magnetic core made of a magnetically soft amorphous alloy coil twisted from cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the next the ratio, at%: iron 1.65-5, the sum of iron and manganese 4-8, silicon 2-8, the sum of silicon and boron 16-24, cobalt - the rest, while in the magnetic circuit the ratio Tssh / Tsn is less than 1.15, where Tstakh is the maximum relative magnetic permeability, Tsn is the initial relative magnetic permeability, and a coating of polymer material is applied over the magnetic circuit.

The next option is the Magnetic core, made of a magnetically soft amorphous alloy twisted tape containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%: iron 1.65-5, the amount of iron and manganese 48 , silicon 2-8, the sum of silicon and boron 16-24, cobalt - the rest, while in the magnetic circuit the ratio Tsmah / Mn is less than 1.15, where (imax is the maximum relative magnetic permeability, Tsn is the initial relative magnetic permeability, over magnetic circuit coated of polymeric material, and between the turns of the tape is adhesive.

FIG. 1. Tape Magnetic circuit in a longitudinal magnetic field H | | and transverse magnetic field N.

Examples. In an induction vacuum furnace, cobalt-based alloys containing iron, manganese, silicon and boron were smelted. The melt was cast on the Sirius 150 / 0.02M installation. Thickness obtained

 / g

the amorphous ribbon was 25–30 μm. The tape was wound into toroidal magnetic cores with an external diameter of 32 mm, an internal diameter of 20 mm, and a height of 10 mm, then part of the magnetic cores was penetrated with glue based on sodium silicate. After that, the magnetic cores were annealed at the optimum temperature. During annealing and cooling, the magnetic cores were in a transverse or longitudinal magnetic field (Fig. 1). After annealing, all magnetic cores were coated with a 0.4 mm thick polypropylene film. Table 1 shows the chemical composition of the prepared alloys, and tables 2 and 3 show the results after annealing in a longitudinal HI I and transverse magnetic field HI of the squareness coefficient of the magnetic hysteresis loop Kd Vg / Bgoo of the magnetic induction Bgoo at a magnetic field of 800 A / m and relations Tstah / Tsn- In the table. 3 presents data for the magnetic circuit of alloy No. 1. From tables 2 and 3 it follows that the proposed alloys have a sufficiently high magnetic induction BSOO more than 0.9 T. Magnetic cores after annealing in a longitudinal magnetic field have a high coefficient of rectangularity of the magnetic hysteresis loop Kp 0.9, and after annealing in a transverse magnetic field, a low residual magnetic induction Kp 0.05 and a high degree of linearity of the magnetization curve Tsscah / 1L 5 are obtained.

Table 1.

Table 2.

The numerator shows the data after winding the magnetic circuit and annealing, in the denominator - after winding the magnetic circuit, annealing and coating of polypropylene.

SOURCES OF INFORMATION

1, Natent ClIlAJjoM 14503, H01F1 / 04, 1992.

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Table 3.

Claims (4)

1. The magnetic circuit, made of twisted from a tape magnetically soft amorphous alloy containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%:
Iron - 1.65-5
The amount of iron and manganese - 4-8
Silicon - 2-8
The sum of silicon and boron is 16-24
Cobalt - Else
while in the magnetic circuit, the ratio B _r / B _{800 is} greater than 0.9, where B _r is the residual magnetic induction, B ₈₀₀ is the magnetic induction at a magnetic field of 800 A / m, and a coating of polymer material is applied over the magnetic circuit. 2. The magnetic circuit, made from a tape of a magnetically soft amorphous alloy containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%:
Iron - 1.65-5
The amount of iron and manganese - 4-8
Silicon - 2-8
The sum of silicon and boron is 16-24
Cobalt - Else
in the magnetic circuit, the ratio B _r / B _{800 is} greater than 0.9, where B _r is the residual magnetic induction, B ₈₀₀ is the magnetic induction at a magnetic field strength of 800 A / m, a coating of polymer material is applied over the magnetic circuit, and there is glue. 3. The magnetic circuit, made from a tape of a magnetically soft amorphous alloy containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%:
Iron - 1.65-5
The amount of iron and manganese - 4-8
Silicon - 2-8
The sum of silicon and boron is 16-24
Cobalt - Else
in this case, in the magnetic circuit, the ratio μ _max / μ _{n is} less than 1.15, where μ _max is the maximum relative magnetic permeability, μ is the initial relative magnetic permeability, and a coating of polymer material is applied over the magnetic circuit. 4. The magnetic circuit, made of twisted from a tape magnetically soft amorphous alloy containing cobalt, iron, manganese, silicon and boron, characterized in that the alloy contains components in the following ratio, at%:
Iron - 1.65-5
The amount of iron and manganese - 4-8
Silicon - 2-8
The sum of silicon and boron is 16-24
Cobalt - Else
in this case, in the magnetic circuit, the ratio μ _max / μ _{n is} less than 1.15, where μ _max is the maximum relative magnetic permeability, μ _n is the initial relative magnetic permeability, a coating of polymer material is applied over the magnetic core, and glue is located between the turns of the tape.