Sheet-shaped magnetic member

Abstract

To provide a sheet-shaped magnetic member which can be suppressed in eddy current loss.SOLUTION: A sheet-shaped magnetic member comprises a laminate in which a plurality of ribbons being nanocrystalline alloy ribbons or amorphous alloy ribbons, are laminated. A lamination surface of the laminate is parallel to a main surface of the sheet-shaped magnetic member. The sheet-shaped magnetic member further includes, for example, a soft magnetic member facing the lamination surface. For example, a crack is formed on the main surface of the soft magnetic member. For example, a crack is formed on the main surface of the ribbon.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a sheet-shaped magnetic member. [Background technology]

[0002] The non-contact charging system includes a primary coil and a secondary coil. The non-contact charging system also includes sheet-shaped magnetic members on both the primary coil side and the secondary coil side. The sheet-shaped magnetic members function as a yoke for forming a closed magnetic path and as a shield for preventing magnetic flux from leaking to the outside. The sheet-shaped magnetic members are disclosed in Patent Documents 1 and 2. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2019-522355 [Patent Document 2] Patent No. 7074258 Summary of the Invention [Problem to be solved by the invention]

[0004] In a contactless charging system, in order to perform rapid charging, it is necessary to pass a large current through the primary coil. When a large current is passed through the primary coil, the magnetic flux generated from the primary coil increases. When the magnetic flux generated from the primary coil increases, eddy current loss in the sheet-shaped magnetic member increases. In one aspect of the present disclosure, it is preferable to provide a sheet-shaped magnetic member capable of suppressing eddy current loss. [Means for solving the problem]

[0005] One aspect of the present disclosure is a sheet-shaped magnetic member. The sheet-shaped magnetic member includes a laminate in which a plurality of ribbons, which are nanocrystalline alloy ribbons or amorphous alloy ribbons, are laminated. A lamination surface of the laminate is parallel to a main surface of the sheet-shaped magnetic member. The sheet-shaped magnetic member according to one aspect of the present disclosure can suppress eddy current loss. [Brief description of the drawings]

[0006] [Figure 1] 1 is a perspective view illustrating a configuration of a sheet-shaped magnetic member according to a first embodiment. [Diagram 2] 1A to 1C are explanatory diagrams showing a method for manufacturing a laminate. [Diagram 3] FIG. 11 is a perspective view illustrating a configuration of a sheet-shaped magnetic member according to a second embodiment. [Figure 4] FIG. 11 is a perspective view illustrating a configuration of a sheet-shaped magnetic member according to a third embodiment. [Diagram 5] FIG. 4 is a perspective view illustrating a configuration of a sheet-shaped magnetic member of a comparative example. [Figure 6] FIG. 4 is a perspective view illustrating a configuration of a sheet-shaped magnetic member of a comparative example. [Figure 7] FIG. 2 is an explanatory diagram illustrating the configuration of a measurement device for measuring Ls, Rs, and Q values. [Figure 8] FIG. 1 is an explanatory diagram illustrating a configuration of a contactless power supply system for a vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Exemplary embodiments of the present disclosure will now be described with reference to the drawings. First Embodiment 1. Structure of sheet-shaped magnetic member 1 The structure of the sheet-shaped magnetic member 1 will be described with reference to FIG. 1. The sheet-shaped magnetic member 1 has a sheet-like form. The thickness direction of the sheet-shaped magnetic member 1 is the Z direction. When viewed from the Z direction, the shape of the sheet-shaped magnetic member 1 is, for example, rectangular. The direction of one side of the rectangle is the X direction. The X direction is perpendicular to the Z direction. The direction perpendicular to both the X direction and the Z direction is the Y direction. The Y direction is parallel to one of the sides of the rectangle.

[0008] The main surface 1A of the sheet-shaped magnetic member 1 is a plane perpendicular to the Z direction. The main surface 1A is the plane with the largest area among the multiple planes constituting the surface of the sheet-shaped magnetic member 1. The sheet-shaped magnetic member 1 has two opposing main surfaces 1A. The thickness of the sheet-shaped magnetic member 1 is, for example, 0.1 mm or more and 20 mm or less. The thickness of the sheet-shaped magnetic member 1 is the thickness in the Z direction.

[0009] The sheet-shaped magnetic member 1 includes a laminate 3. In particular, in this embodiment, the sheet-shaped magnetic member 1 is composed only of the laminate 3. The laminate 3 is formed by stacking a plurality of thin ribbons 5 in the X direction. The thickness direction of each thin ribbon 5 is the X direction. When viewed from the X direction, each of the plurality of thin ribbons 5 has a rectangular shape. The long side of the rectangle is parallel to the Y direction, and the short side of the rectangle is parallel to the Z direction. The number of thin ribbons 5 stacked in the laminate 3 is 10 or more.

[0010] Each ribbon 5 is a nanocrystalline alloy ribbon or an amorphous alloy ribbon. A main surface 5A of the ribbon 5 located at an end of the laminate 3 in the X direction is a side surface of the laminate 3. The main surface 5A of the ribbon 5 is the plane having the largest area among multiple planes constituting the surface of the ribbon 5. Each ribbon 5 has two opposing main surfaces 5A. The main surfaces 5A are perpendicular to the X direction. The main surfaces 5A are parallel to the Z direction and the Y direction.

[0011] The laminate 3 has a lamination surface 3A. The lamination surface 3A is a part of the surface of the laminate 3. The lamination surface 3A is a plane formed by a collection of end faces of a plurality of laminated thin ribbons 5, and is a plane perpendicular to the Z direction. The lamination surface 3A is parallel to the main surface 1A. In particular, in this embodiment, the lamination surface 3A coincides with the main surface 1A.

[0012] In each of the ribbons 5, cracks 6 are formed on at least one of the main surfaces 5A. For example, in each of the ribbons 5, cracks 6 are formed on both of the main surfaces 5A. The cracks 6 are formed, for example, over the entire main surface 5A. For example, a plurality of cracks 6 are formed on one main surface 5A.

[0013] In the laminate 3, adjacent thin ribbons 5 are bonded together, for example, via a double-sided tape 7 or resin. For example, the Q value of the sheet-shaped magnetic member 1 is 30 or more. 2. Manufacturing method of sheet-shaped magnetic member 1 A method for manufacturing the sheet-shaped magnetic member 1 will be described with reference to Fig. 2. As shown in Fig. 2, a plurality of thin ribbons 5 and a plurality of double-sided tapes 7 are prepared. For example, the shape and size of the double-sided tapes 7 are the same as those of the thin ribbons 5.

[0014] After one surface of the ribbon 5 is adhered to the double-sided tape 7, a roll with protrusions is pressed against the other surface of the ribbon 5 (i.e., the surface on the side to which the double-sided tape 7 is not adhered), thereby forming cracks 6 in each ribbon 5. In this manner, a ribbon 5 (hereinafter referred to as ribbon 5 with double-sided tape 7) is obtained in which the double-sided tape 7 is adhered to one surface and the surface of the ribbon 5 on which the cracks 6 are formed is exposed on the other surface. A plurality of such thin ribbons 5 with double-sided tape 7 are prepared, and the plurality of thin ribbons 5 with double-sided tape 7 are laminated such that the surface of one thin ribbon 5 with double-sided tape 7 that is not attached thereto is adhered to the double-sided tape 7 of another thin ribbon 5 with double-sided tape 7. By laminating the thin ribbons 5 with double-sided tape 7 to the required number of layers, the laminate 3 and sheet-like magnetic member 1 shown in FIG. 1 are obtained. The double-sided tape 7 includes a base material and an adhesive provided on both sides of the base material. The base material is formed using a flexible resin material. For example, polyethylene terephthalate (PET) or the like can be used as the resin material. For example, an acrylic adhesive, a silicone adhesive, or the like can be used as the adhesive. Furthermore, when stacking the required number of thin ribbons 5 with double-sided tape 7, a laminate larger than the Z direction dimension and / or Y direction dimension of the sheet-shaped magnetic member 1 may be produced, and then the sheet-shaped magnetic member 1 may be cut to a predetermined dimension. When cutting the sheet-shaped magnetic member 1 to a predetermined dimension, the sheet-shaped magnetic member 1 may be cut to a member whose X direction dimension is shorter than the predetermined dimension of the sheet-shaped magnetic member 1, and the member may be stacked in the X direction.

[0015] 3. Effects of the sheet-shaped magnetic member 1 (1A) The lamination surface 3A is parallel to the main surface 1A. The lamination surface 3A is composed of a collection of end faces of multiple thin ribbons 5. Therefore, the lamination surface 3A parallel to the main surface 1A is composed of a collection of small magnetic bodies. As a result, the sheet-shaped magnetic member 1 can suppress eddy current loss generated in the XY plane by magnetic flux flowing in the Z direction. The XY plane is a plane parallel to the X and Y directions. Moreover, the sheet-shaped magnetic member 1 can suppress eddy current loss generated in the XZ plane by magnetic flux flowing in the Y direction. The XZ plane is a plane parallel to the X and Z directions.

[0016] (1B) In each of the ribbons 5, cracks 6 are formed on at least one of the main surfaces 5A. Therefore, the sheet-shaped magnetic member 1 can suppress eddy current loss generated in the YZ plane by the magnetic flux flowing in the Y direction. The YZ plane is a plane parallel to the Y and Z directions. (1C) Adjacent ribbons 5 are bonded via double-sided tape 7. Therefore, adjacent ribbons 5 can be insulated from each other.

[0017] (1D) The thickness of the sheet-shaped magnetic member 1 is 0.1 mm or more and 20 mm or less. Since the nanocrystalline alloy ribbon and the amorphous alloy ribbon have high saturation magnetic flux density, the sheet-shaped magnetic member 1 can be made thinner than when a material such as ferrite is used. (1E) The number of laminated thin ribbons 5 in the laminate 3 is 10 or more.

[0018] (1F) The Q value of the sheet-shaped magnetic member 1 is equal to or greater than 30. Therefore, the sheet-shaped magnetic member 1 has excellent magnetic properties. <Second embodiment> 1. Differences from the first embodiment The second embodiment has a basic configuration similar to that of the first embodiment, and therefore differences will be described below. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description will be referred to.

[0019] In the above-described first embodiment, the sheet-shaped magnetic member 1 is composed only of the laminate 3. In contrast, the second embodiment differs from the first embodiment in that the sheet-shaped magnetic member 1 includes a laminate 3 and a soft magnetic member 11, as shown in FIG.

[0020] The soft magnetic member 11 is a sheet-like member. The thickness direction of the soft magnetic member 11 is parallel to the Z direction. The soft magnetic member 11 faces the stacking surface 3A. For example, the soft magnetic member 11 is in contact with the stacking surface 3A. In this embodiment, one main surface 1A of the sheet-like magnetic member 1 is the main surface of the soft magnetic member 11.

[0021] The soft magnetic member 11 is formed by stacking a plurality of ribbons 13 in the Z direction. The thickness direction of each ribbon 13 is the Z direction. The ribbons 13 are made of a soft magnetic material. Examples of the ribbons 13 include nanocrystalline alloy ribbons, amorphous alloy ribbons, and ferrite sheets. The number of ribbons 13 stacked in the soft magnetic member 11 is, for example, two or more layers. The thickness of each ribbon 13 is, for example, 50 μm or more and 5000 μm or less.

[0022] In each of the ribbons 13, cracks 15 are formed on at least one of the main surfaces 13A. For example, in each of the ribbons 13, cracks 15 are formed on both of the main surfaces 13A. The cracks 15 are formed, for example, over the entire main surface 13A. For example, a plurality of cracks 15 are formed on one of the main surfaces 13A. Note that, although it is more preferable that the cracks 15 are formed in the ribbons 13, the cracks 15 may not be formed.

[0023] 2. Manufacturing method of sheet-shaped magnetic member 1 The laminate 3 is manufactured in the same manner as in the first embodiment. The soft magnetic member 11 can be manufactured, for example, by a method of adhering a plurality of thin ribbons 13 via a double-sided tape 7 or a resin. The method of forming the cracks 15 in the thin ribbons 13 is, for example, as follows. A double-sided tape is placed between adjacent thin ribbons 13. The adjacent thin ribbons 13 are adhered via the double-sided tape. After adhering the thin ribbons 13 to the double-sided tape, a roll provided with protrusions is pressed against the thin ribbons 13, thereby forming the cracks 15 on at least one of the main surfaces 13A of each thin ribbon 13. Next, the soft magnetic member 11 is adhered to the lamination surface 3A. Examples of a method for adhering the soft magnetic member 11 include a method of adhering via double-sided tape 7 or resin.

[0024] 3. Effects of the sheet-shaped magnetic member 1 According to the second embodiment described above in detail, in addition to the effects of the first embodiment described above, the following effects are also obtained.

[0025] (2A) The soft magnetic member 11 suppresses leakage of magnetic flux. By providing the soft magnetic member 11, the magnetic properties of the sheet-shaped magnetic member 1 are further improved. (2B) Cracks 15 are formed on the main surface 13A of the soft magnetic member 11. Therefore, it is possible to reduce eddy current loss generated in the XY plane by the magnetic flux flowing in the Z direction. <Third embodiment> 1. Differences from the first embodiment The third embodiment has a basic configuration similar to that of the first embodiment, and therefore differences will be described below. Note that the same reference numerals as those in the first embodiment indicate the same configurations, and the preceding description will be referred to.

[0026] In the above-described first embodiment, the cracks 6 are formed on at least one of the main surfaces 5A of each ribbon 5. In contrast, the third embodiment differs from the first embodiment in that no cracks 6 are formed in each ribbon 5, as shown in FIG.

[0027] 2. Manufacturing method of sheet-shaped magnetic member 1 Basically, the sheet-shaped magnetic member 1 can be manufactured in the same manner as in the first embodiment, except that a thin ribbon 5 in which no cracks 6 are formed is used.

[0028] 3. Effects of the sheet-shaped magnetic member 1 According to the third embodiment described above in detail, the effects (1A) and (1C) to (1F) of the first embodiment described above are achieved. <Fourth embodiment> The fourth embodiment has a basic configuration similar to that of the second embodiment, and therefore differences will be described below. Note that the same reference numerals as those in the second embodiment indicate the same configuration, and the preceding description will be referred to.

[0029] In the second embodiment described above, the cracks 6 are formed on at least one of the main surfaces 5A of each ribbon 5. In contrast, the fourth embodiment differs from the second embodiment in that the cracks 6 are not formed in each ribbon 5. It is more preferable that the cracks 15 are formed in the ribbon 13, but the cracks 15 do not have to be formed.

[0030] 2. Manufacturing method of sheet-shaped magnetic member 1 Basically, the sheet-shaped magnetic member 1 can be manufactured in the same manner as in the second embodiment, except that a thin ribbon 5 in which no cracks 6 are formed is used.

[0031] 3. Effects of the sheet-shaped magnetic member 1 The fourth embodiment described above in detail provides the effects (1A), (1C) to (1F) of the first embodiment and the effects of the second embodiment. <Example> 1. Production of sheet-like magnetic members 1 of examples and comparative examples The following sheet-shaped magnetic member 1 was manufactured.

[0032] (1) Sheet-shaped magnetic member 1_S1 The sheet-shaped magnetic member 1_S1 was the sheet-shaped magnetic member 1 of the first embodiment. The width in the X direction, the width in the Y direction, and the thickness of the sheet-shaped magnetic member 1_S1 were 50 mm, 50 mm, and 4 mm, respectively.

[0033] The ribbons 5 were nanocrystalline alloy ribbons. The ribbons 5 were FINEMET FT-3 (registered trademark) manufactured by Proterial Co., Ltd. The number of ribbons 5 stacked in the laminate 3 was 2200. The thickness of each ribbon 5 was 16 μm.

[0034] In the laminate 3, adjacent thin strips 5 were bonded via double-sided tape 7. The double-sided tape 7 was made of PSA. The double-sided tape 7 was a film-based double-sided tape (product name) manufactured by DIC Corporation. (2) Sheet-shaped magnetic member 1_S2 The sheet-shaped magnetic member 1_S2 was the sheet-shaped magnetic member 1 of the second embodiment. The laminate 3 included in the sheet-shaped magnetic member 1_S2 was the same as that of the sheet-shaped magnetic member 1_S1.

[0035] The soft magnetic member 11 included in the sheet-shaped magnetic member 1_S2 had a width in the X direction and a width in the Y direction of 60 mm and 60 mm, respectively. The soft magnetic member 11 was configured by laminating five layers of ribbons 13 in the Z direction. The ribbons 13 had a thickness of 160 μm. The material of the ribbons 13 was a nanocrystalline alloy ribbon. The ribbons 13 were FINEMET FT-3 (registered trademark) manufactured by Proterial.

[0036] (3) Sheet-shaped magnetic member 1_S3 The sheet-shaped magnetic member 1_S3 was the sheet-shaped magnetic member 1 of the third embodiment. The configuration of the sheet-shaped magnetic member 1_S3 was basically the same as that of the sheet-shaped magnetic member 1_S1. However, in the sheet-shaped magnetic member 1_S3, no cracks 6 were formed in each of the thin ribbons 5.

[0037] (4) Sheet-shaped magnetic member 1_S4 The sheet-shaped magnetic member 1_S4 was the sheet-shaped magnetic member 1 of the fourth embodiment. The configuration of the sheet-shaped magnetic member 1_S4 was basically the same as that of the sheet-shaped magnetic member 1_S2. However, in the sheet-shaped magnetic member 1_S4, no cracks 6 were formed in each of the thin ribbons 5. (5) Sheet-shaped magnetic member 1_S5 The sheet-shaped magnetic member 1_S5 was basically the same as the sheet-shaped magnetic member 1_S2, except that the sheet-shaped magnetic member 1_S5 had no cracks 15 formed in the soft magnetic member 11. (6) Sheet-shaped magnetic member 1_S6 The sheet-shaped magnetic member 1_S6 was basically the same as the sheet-shaped magnetic member 1_S4, except that the sheet-shaped magnetic member 1_S6 had no cracks 15 formed in the soft magnetic member 11.

[0038] (7) Sheet-shaped magnetic member R1 The sheet-shaped magnetic member R1 shown in Fig. 5 was manufactured. The thickness direction of the sheet-shaped magnetic member R1 was the Z direction. The width in the X direction, the width in the Y direction, and the thickness were 60 mm, 60 mm, and 4 mm, respectively.

[0039] The sheet-shaped magnetic member R1 was formed by laminating 175 thin ribbons 5 in the Z direction. The thickness direction of each thin ribbon 5 was the Z direction. The thin ribbons 5 were the same as those used in the sheet-shaped magnetic members 1_S1 to 1_S6. No cracks 6 were formed in the thin ribbons 5.

[0040] (8) Sheet-shaped magnetic member R2 The sheet-shaped magnetic member R2 shown in Fig. 6 was manufactured. The configuration of the sheet-shaped magnetic member R2 was basically the same as that of the sheet-shaped magnetic member R1. However, in the sheet-shaped magnetic member R2, cracks 6 were formed in each of the thin ribbons 5.

[0041] 2. Evaluation of the sheet-like magnetic members 1 of the examples and comparative examples Using a measuring device 21 shown in Fig. 7, the Ls, Rs, and Q value of the sheet-shaped magnetic member 1 of each Example and Comparative Example were measured. Ls is inductance. Rs is electrical resistance. The Q value is expressed by the following formula (1). Equation (1) Q=(Ls / Rs)×2πf In formula (1), f is the frequency of the magnetic field used when measuring the Q value. In each of the examples and comparative examples, f was 85 kHz. The measuring device 21 was equipped with a coil 23 and an LCR meter 25. The Ls of the coil 23 was 3.5 μH. The Rs of the coil 23 was 28 mΩ at 85 kHz.

[0042] Measurement sample 27 was placed on coil 23. Measurements were performed both with and without aluminum plate 29 placed on measurement sample 27. The measurement results are shown in Table 1. The row "without Al plate" in Table 1 is the measurement result when aluminum plate 29 was not placed on measurement sample 27. The row "with Al plate" in Table 1 is the measurement result when aluminum plate 29 was placed on measurement sample 27.

[0043] [Table 1]

[0044] As shown in Table 1, in the sheet-shaped magnetic members 1_S1 to 1_S6, Rs was small both when the aluminum plate 29 was placed on the measurement sample 27 and when it was not. The smaller the Rs, the smaller the eddy current loss. Therefore, the sheet-shaped magnetic members 1_S1 to 1_S6 can suppress the eddy current loss. The sheet-shaped magnetic members 1_S1 to 1_S2 can suppress eddy current loss more effectively than the sheet-shaped magnetic members R1 to R2. In the sheet-shaped magnetic members 1_S3 to 1_S4, 1_S6, and R1, no cracks 6 are formed in the thin ribbons 5. The sheet-shaped magnetic members 1_S3 to 1_S4, and 1_S6 can suppress eddy current loss more effectively than the sheet-shaped magnetic member R1. <Other embodiments> Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modified forms.

[0045] (1) In the second and fourth embodiments, the cracks 15 do not have to be formed in the soft magnetic member 11. Even in this case, the effect of the first embodiment and the effect (2A) of the second embodiment can be obtained. (2) In the first to fourth embodiments, the ribbon 5 may be an amorphous alloy ribbon. In this case, the same effects as those of the first to fourth embodiments can be achieved.

[0046] (3) In the laminate 3 of the first to fourth embodiments, adjacent thin ribbons 5 may be bonded via a resin. In this case, the same effects as those of the first to fourth embodiments can be obtained. Examples of the resin include an epoxy resin.

[0047] (4) The sheet-shaped magnetic member 1 can be used, for example, in a contactless power supply system. The sheet-shaped magnetic member 1 can be used, for example, in a contactless power supply system 101 for a vehicle shown in FIG. 8. The contactless power supply system 101 for a vehicle includes a first part 103 mounted on the vehicle and a second part 105 fixed to a road. The first part 103 includes a secondary coil 107 and the sheet-shaped magnetic member 1. The second part 105 includes a primary coil 111 and the sheet-shaped magnetic member 1.

[0048] In each of the first portion 103 and the second portion 105, the sheet-shaped magnetic member 1 functions as a yoke for forming a closed magnetic circuit and as a shield for preventing magnetic flux from leaking to the outside. The second part 105 may include another magnetic member instead of the sheet-shaped magnetic member 1. Since the first part 103 is mounted on a vehicle, it is preferable that it is lightweight. Therefore, it is preferable that the sheet-shaped magnetic member 1 is also thin and lightweight. The sheet-shaped magnetic member 1 is suitable for the first part 103 because it can suppress eddy current loss even if it is thin.

[0049] (5) The function of one component in each of the above embodiments may be shared by multiple components, or the functions of multiple components may be performed by one component. Also, part of the configuration of each of the above embodiments may be omitted. Also, at least part of the configuration of each of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0050] (6) In addition to the sheet-shaped magnetic member 1 described above, the present disclosure can be realized in various forms, such as a system including the sheet-shaped magnetic member 1 as a component, a manufacturing method for the sheet-shaped magnetic member 1, and the like.

[0051] [Technical idea disclosed in this specification] [Item 1] A sheet-shaped magnetic member, The present invention includes a laminate in which a plurality of ribbons, which are nanocrystalline alloy ribbons or amorphous alloy ribbons, are laminated, a lamination surface of the laminate is parallel to a main surface of the sheet-shaped magnetic member; Sheet-shaped magnetic member. [Item 2] Item 1 is a sheet-shaped magnetic member according to the present invention, Further comprising a soft magnetic member facing the lamination surface. Sheet-shaped magnetic member. [Item 3] Item 2. A sheet-shaped magnetic member, A crack is formed on at least one main surface of the soft magnetic member. Sheet-shaped magnetic member. [Item 4] A sheet-shaped magnetic member according to any one of items 1 to 3, A crack is formed on at least one main surface of the ribbon. Sheet-shaped magnetic member. [Item 5] A sheet-shaped magnetic member according to any one of items 1 to 4, In the laminate, adjacent thin strips are bonded via double-sided tape or resin. Sheet-shaped magnetic member. [Item 6] A sheet-shaped magnetic member according to any one of items 1 to 5, The thickness is between 0.1mm and 20mm. Sheet-shaped magnetic member. [Item 7] A sheet-shaped magnetic member according to any one of items 1 to 6, The number of the thin ribbons stacked in the laminate is 10 or more. Sheet-shaped magnetic member. [Item 8] A sheet-shaped magnetic member according to any one of items 1 to 7, Q value is 30 or more, Sheet-shaped magnetic member. [Explanation of symbols]

[0052] 1...sheet-shaped magnetic member, 1A...main surface, 3...laminated body, 3A...laminated surface, 5...thin ribbon, 5A...main surface, 6...crack, 7...double-sided tape, 11...soft magnetic member, 13...thin ribbon, 13A...main surface, 15...crack, 21...measuring device, 23...coil, 25...CR meter, 29...aluminum plate, 101...non-contact power supply system, 103...first part, 105...second part, 107...secondary coil, 111...primary coil

Claims

1. A sheet-shaped magnetic member, The present invention includes a laminate in which a plurality of ribbons, which are nanocrystalline alloy ribbons or amorphous alloy ribbons, are laminated, a lamination surface of the laminate is parallel to a main surface of the sheet-shaped magnetic member; Sheet-shaped magnetic member.

2. 2. The sheet-shaped magnetic member according to claim 1, Further comprising a soft magnetic member facing the lamination surface. Sheet-shaped magnetic member.

3. 3. The sheet-shaped magnetic member according to claim 2, A crack is formed on a main surface of the soft magnetic member. Sheet-shaped magnetic member.

4. The sheet-shaped magnetic member according to any one of claims 1 to 3, A crack is formed on a main surface of the ribbon. Sheet-shaped magnetic member.

5. The sheet-shaped magnetic member according to any one of claims 1 to 3, In the laminate, adjacent thin strips are bonded via double-sided tape or resin. Sheet-shaped magnetic member.

6. The sheet-shaped magnetic member according to any one of claims 1 to 3, The thickness is 0.1 mm or more and 20 mm or less. Sheet-shaped magnetic member.

7. The sheet-shaped magnetic member according to any one of claims 1 to 3, The number of the thin ribbons stacked in the laminate is 10 or more. Sheet-shaped magnetic member.

8. The sheet-shaped magnetic member according to any one of claims 1 to 3, The Q value is 30 or more. Sheet-shaped magnetic member.

Images