Amorphous alloy core

Abstract

To provide an amorphous alloy core with a high squareness ratio and low core loss. 【Solution】 An amorphous alloy core is formed by stacking amorphous alloy ribbons. The core loss of the amorphous alloy core is 5300kW / m 3 or less. The composition of the amorphous alloy ribbon is represented by the following formula (1). Formula (1) Co 100-a-b-c-d-e-f Mn a Fe b Mo c Si d B e Ni f (In the formula (1), the units of a, b, c, d, e, and f are atomic %. The values of a, b, c, d, e, and f are as follows: 0.0≦a≦5.0, 0.0≦b≦4.5, 0.0≦c≦4.4, 13.0≦d≦15.5, 8.0≦e≦15.0, 0.0≦f≦5.0).

Description

Technical Field

[0001] The present disclosure relates to an amorphous alloy core.

Background Art

[0002] Patent Document 1 discloses an amorphous alloy ribbon. An amorphous alloy core formed by laminating amorphous alloy ribbons is used, for example, as a core of a saturable reactor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of Invention

Problem to be Solved by the Invention

[0004] The core of a saturable reactor is required to have a high squareness ratio and low core loss. In one aspect of the present disclosure, it is preferable to provide an amorphous alloy core having a high squareness ratio and low core loss.

Means for Solving the Problem

[0005] One aspect of the present disclosure is an amorphous alloy core formed by laminating amorphous alloy ribbons, wherein the core loss is 5300kW / m 3 or less, and the composition of the amorphous alloy ribbon is represented by the following formula (1).

[0006] Formula (1) Co 100-a-b-c-d-e-f Mn a Fe b Mo c Si d B e Ni f (In the aforementioned formula (1), the units of a, b, c, d, e, f are atomic %. The values of a, b, c, d, e, f are as follows: 0.0≦a≦5.0, 0.0≦b≦4.5, 0.0≦c≦4.4, 13.0≦d≦15.5, 8.0≦e≦15.0, 0.0≦f≦5.0) [Description of Embodiments]

[0007] Exemplary embodiments of the present disclosure will be described. 1. Configuration of Amorphous Alloy Ribbon The composition of the amorphous alloy ribbon is represented by the following formula (1).

[0008] Formula (1) Co 100-a-b-c-d-e-f Mn a Fe b Mo c Si d B e Ni f In formula (1), the units of a, b, c, d, e, f are atomic %. In formula (1), the values of a, b, c, d, e, f are respectively as follows.

[0009] 0.0≦a≦5.0 0.0≦b≦4.5 0.0≦c≦4.4 13.0≦d≦15.5 8.0≦e≦15.0 0.0≦f≦5.0

[0010] The value of a is, for example, 4 or less, for example, 3.7 or less. The value of b is, for example, 4 or less, for example, 3.7 or less. The value of b is, for example, 1 or more, for example, 1.2 or more. The value of c is, for example, 4 or less, for example, 3.8 or less.

[0011] The value of c is, for example, 1 or more, for example, 1.4 or more. The value of d is, for example, 13.5 or more. The value of e is, for example, 14.5 or less, for example, 14 or less. The value of e is, for example, 9 or more. The value of f is, for example, 3 or less, for example, 2 or less.

[0012] In amorphous alloy thin strips, the magnetostriction can be adjusted by controlling the amount of Mn. In amorphous alloy thin strips, the Curie temperature T can be controlled by suppressing the amount of Mn. c The Curie temperature can be increased. c When the value is high, the following effects are produced.

[0013] Let's consider the case where an amorphous alloy strip is used to manufacture the core of a saturable reactor. The Curie temperature T of the amorphous alloy strip. c If the saturable reactor is high, it will function as a magnetic switch even at high temperatures.

[0014] In the composition of amorphous alloy thin strips, by suppressing the amount of Fe, the saturation magnetic flux density B s This can be suppressed. In the composition of amorphous alloy thin strips, increasing the amount of Mo can suppress the saturation magnetic flux density B s This can suppress [the following]. Furthermore, by suppressing the amount of Mo in the composition of the amorphous alloy strip, the aspect ratio can be increased. A aspect ratio of 0.6 or higher is preferable. A high aspect ratio provides the following effects.

[0015] Let's consider the case where a core for a saturable reactor is manufactured using an amorphous alloy strip. A higher square-to-square ratio improves the responsiveness of a magnetic switch made of a saturable reactor to changes in magnetic flux.

[0016] Furthermore, by suppressing the amount of Mo in the composition of amorphous alloy strips, the Curie temperature T c This can increase the casting efficiency. Furthermore, by suppressing the amount of Mo, the difficulty of casting amorphous alloy strips can be reduced. Note that high casting difficulty refers to the fact that when the alloy is melted and placed on the cooling roll, the alloy oxidizes easily and burns easily, or it is difficult to form a ribbon shape.

[0017] In amorphous alloy strips, soft magnetism can be adjusted by controlling the amount of Si. Soft magnetism refers to coercivity and loss. By suppressing the amount of Si, the Curie temperature T can be controlled. c This allows us to increase the aspect ratio.

[0018] In the composition of amorphous alloy strips, increasing the amount of B increases the amorphous formation ability. Increased amorphous formation ability makes it more difficult for crystals to precipitate in the amorphous alloy strips. Magnetostriction can be adjusted by controlling the amount of Ni in the composition of amorphous alloy strips. By reducing the amount of Ni, the manufacturing cost of amorphous alloy strips can be reduced.

[0019] The composition of the amorphous alloy strip may be obtained by substituting Mo with element E1 in formula (1). E1 is Nb, W, or Ta. The composition of the amorphous alloy strip may be obtained by substituting Mn with element E2 in formula (1). E2 is V or Cr. The composition of the amorphous alloy strip may be obtained by substituting Mo with element E1 and Mn with element E2 in formula (1).

[0020] The magnetic flux density of an amorphous alloy thin strip when magnetized with a magnetic field of 80 A / m is given by B. 80 Let's assume that. B 80 This corresponds to the saturation magnetic flux density. 80 It is preferable that it is 0.6T or less. 80 When the thickness is 0.6T or less, core loss can be reduced when using an amorphous alloy core. 80 It is preferable that it is 0.3T or higher. 80 If the thickness is 0.3T or greater, the amorphous alloy core can be miniaturized. 80 Factors that influence this include the amount of Co, Fe, Ni, Mn, and Mo added. The less Co, Fe, Ni, and Mn added, the lower B 80 It becomes smaller. The more Mo is added, the smaller B becomes. 80 It becomes smaller.

[0021] Curie temperature T of amorphous alloy thin strip c It is preferable that the Curie temperature is 145°C or higher. In the composition of the amorphous alloy thin strip, by suppressing the amount of one or more of Mn, Mo, and Si, the Curie temperature T c It can be increased.

[0022] The thickness of the amorphous alloy strip is preferably 18 μm or less. When the thickness of the amorphous alloy strip is 18 μm or less, the core loss (eddy current loss) when used as an amorphous alloy core can be reduced.

[0023] The angularity ratio of amorphous alloy strips is preferably 0.6 or higher. Factors that affect the angularity ratio include the amount of Mo and Si added, and magnetostriction. The less Mo and Si added, the higher the angularity ratio. The less magnetostriction, the higher the angularity ratio.

[0024] 2. Method for manufacturing amorphous alloy strips Amorphous alloy strips can be manufactured, for example, by the following method: A molten alloy whose composition is represented by formula (1) is rapidly cooled by a single-roll method. In the single-roll method, the molten alloy is sprayed onto the surface of a rotating cooling roll. The molten metal is rapidly cooled on the surface of the cooling roll, forming a long amorphous alloy strip. An example of the single-roll method is the method disclosed in Japanese Patent Publication No. 6160784.

[0025] 3. Method for manufacturing amorphous alloy cores Amorphous alloy cores are formed by laminating amorphous alloy strips. Amorphous alloy cores can be manufactured using amorphous alloy strips. One method for manufacturing amorphous alloy cores is to wind a long amorphous alloy strip. In this case, the inner diameter of the amorphous alloy core is, for example, between 2 mm and 100 mm. The outer diameter of the amorphous alloy core is, for example, between 5 mm and 300 mm. The height of the amorphous alloy core is, for example, between 5 mm and 50 mm.

[0026] The manufactured amorphous alloy core has the same magnetic properties as the amorphous alloy strip used in its manufacture. The core loss of the amorphous alloy core is 5300 kW / m 3 The following factors affect core loss: the amount of Co, Fe, Ni, Mn, and Mo added, and the thickness of the amorphous alloy strip. Reducing the amount of Co, Fe, Ni, and Mn added reduces core loss (hysteresis loss and eddy current loss). Increasing the amount of Mo added reduces core loss (hysteresis loss and eddy current loss). Also, reducing the thickness of the amorphous alloy strip reduces core loss (eddy current loss).

[0027] Amorphous alloy core B 80 It is preferable that the Curie temperature of the amorphous alloy core is 0.6T or less. c The temperature is preferably 145°C or higher. The angularity ratio of the amorphous alloy core is preferably 0.6 or higher.

[0028] For example, the manufactured amorphous alloy core can be used as the core of a saturable reactor. The saturable reactor can be used, for example, as a magnetic switch. A magnetic switch is a component of a device such as a pulse power supply.

[0029] 4. Effects of amorphous alloy cores (1A) The amorphous alloy core of this disclosure has a high square ratio and low core loss. (1B) In the amorphous alloy core of this disclosure, the saturation magnetic flux density B s It's low. (1C) In the amorphous alloy core of this disclosure, the Curie temperature T c It's expensive.

[0030] 5. Examples (1) Manufacturing of amorphous alloy strips Amorphous alloy strips S1 to S10 were produced by rapidly cooling molten alloys having the compositions listed in the "Composition" column of Table 1 using a single-roll method.

[0031] [Table 1]

[0032] The amorphous alloy strips S1-S10 were ribbon-shaped. The width and thickness of the ribbon-shaped strips are shown in Table 1. For S6 and S8-S10, strips with a thickness of 18 μm and strips with a thickness of 14 μm were manufactured, respectively.

[0033] (2) Manufacturing of amorphous alloy cores Amorphous alloy cores were manufactured for each of the amorphous alloy strips S1 to S10. The method for manufacturing the amorphous alloy cores was to wind a long amorphous alloy strip. The inner diameter of the amorphous alloy core was 10 mm. The outer diameter of the amorphous alloy core was 13 mm. The height of the amorphous alloy core was 10 mm. The amorphous alloy core was made up of laminated amorphous alloy strips.

[0034] The manufactured amorphous alloy cores were subjected to heat treatment. The heat treatment conditions are as shown in Table 2. During the heat treatment, the magnetic field described in the "Applied Magnetic Field" column of Table 2 was applied. During the heat treatment, the highest temperature in the temperature profile was the temperature described in the "Heat Treatment Temperature" column of Table 2.

[0035] (3) Evaluation of amorphous alloy cores After heat treatment, for each amorphous alloy core, B 80 , residual magnetization B r Curie temperature T c The aspect ratio and core loss were measured. 80 , and remanent magnetization B r The measurement was performed by wrapping a wire around an amorphous alloy core and passing a direct current through the wire.

[0036] Curie temperature T c The measurement was performed as follows: The amorphous alloy core was placed in an oven. The temperature inside the oven was set to a predetermined value, and the B of the amorphous alloy core was measured.80 Measure the temperature. Repeat this process while gradually increasing the temperature inside the oven. B 80 The temperature inside the oven when the temperature becomes 0T is called the Curie temperature T. c Let's assume that.

[0037] An ACBH device (Iwasaki Communication Equipment Co., Ltd. BH analyzer SY-8218) was used to measure the core loss. The frequency used for core loss measurement was 100 kHz, and the applied magnetic field strength was 200 A / m. The measurement results are shown in Table 2.

[0038] [Table 2]

[0039] In S3-S4, S6, and S8-S10, the aspect ratio was high and the core loss was low. Also, in S3-S4, S6, and S8-S10, B 80 The Curie temperature T was 0.6T or less. Also, in S3-S4, S6, and S8-S10, c It was expensive.

[0040] In S1 and S5, core loss was large. The reason for the large core loss is presumed to be that the amount of Mo added was small compared to the amounts of Co, Fe, Ni, and Mn added. In S2, B 80 The size was large, and core loss was also large. The reason for this is that the amount of Fe contained in the amorphous alloy thin strip S2 is excessive. In S7, the angularity ratio is low, and the Curie temperature T c The levels were also low. The reason for this is that the amount of Mo contained in the amorphous alloy thin strip S7 is excessive.

[0041] 6. Other Embodiments Although embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments described above and can be implemented in various modified forms.

[0042] (1) Amorphous alloy strips may be used for purposes other than the core of a saturable reactor. For example, amorphous alloy strips can be used as part of the circuitry of a device. Examples of such devices include switching power supplies and laser power supplies. Amorphous alloy strips can also be used in noise absorbers, common mode chokes for switching power supplies, magnetic heads, magnetic sensors, etc.

[0043] (2) The function of one component in each of the above embodiments may be divided among multiple components, or the function of multiple components may be performed by one component. Also, some of the configurations of each of the above embodiments may be omitted. Also, at least some of the configurations of each of the above embodiments may be added to, replaced with, etc., the configurations of other embodiments.

[0044] (3) In addition to the amorphous alloy core described above, this disclosure can also be realized in various forms, such as a system using the amorphous alloy core as a component, a pulse power supply, a method for manufacturing amorphous alloy strips, a method for manufacturing amorphous alloy cores, etc.

[0045] [Technical Concept Disclosed in This Specified Specification] [Item 1] An amorphous alloy core is formed by stacking amorphous alloy strips, Core loss is 5300 kW / m 3 The following: The amorphous alloy core is an amorphous alloy thin strip whose composition is represented by the following formula (1). Formula (1) Co 100-a-b-c-d-e-f Mn a Fe b Mo c Si d B e Ni f (In equation (1) above, the units of a, b, c, d, e, and f are atomic percent. The values ​​of a, b, c, d, e, and f are as follows: 0.0 ≤ a ≤ 5.0, 0.0 ≤ b ≤ 4.5, 0.0 ≤ c ≤ 4.4, 13.0 ≤ d ≤ 15.5, 8.0 ≤ e ≤ 15.0, 0.0 ≤ f ≤ 5.0) [Item 2] The amorphous alloy core described in item 1, Magnetic flux density B when magnetized by a magnetic field of 80 A / m 80 is 0.6T or less. Amorphous alloy core. [Item 3] An amorphous alloy core as described in item 1 or 2, The Curie temperature is 145°C or higher. Amorphous alloy core. [Item 4] An amorphous alloy core described in any one of items 1 to 3, The thickness of the amorphous alloy strip is 18 μm or less. Amorphous alloy core. [Item 5] An amorphous alloy core described in any one of items 1 to 4, The aspect ratio is 0.6 or greater. Amorphous alloy core.

Claims

1. An amorphous alloy core is formed by stacking amorphous alloy strips, Core loss is 5300 kW / m ３ The following: The amorphous alloy core is an amorphous alloy thin strip whose composition is represented by the following formula (1). Formula (1) Co １００－ａ－ｂ－ｃ－ｄ－ｅ－ｆ Mn ａ Fe ｂ Mo ｃ Si ｄ B ｅ Ni ｆ (In equation (1) above, the units of a, b, c, d, e, and f are atomic percent. The values ​​of a, b, c, d, e, and f are as follows: 0.0 ≤ a ≤ 5.0, 0.0 ≤ b ≤ 4.5, 0.0 ≤ c ≤ 4.4, 13.0 ≤ d ≤ 15.5, 8.0 ≤ e ≤ 15.0, 0.0 ≤ f ≤ 5.0)

2. The amorphous alloy core according to claim 1, Magnetic flux density B when magnetized in a magnetic field of 80 A / m ８０ is 0.6 T or less Amorphous alloy core.

3. The amorphous alloy core according to claim 1, The Curie temperature is 145°C or higher. Amorphous alloy core.

4. The amorphous alloy core according to claim 1, The thickness of the amorphous alloy strip is 18 μm or less. Amorphous alloy core.

5. The amorphous alloy core according to claim 1, The aspect ratio is 0.6 or greater. Amorphous alloy core.

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