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WO2016013059A1 - Composant d'inductance - Google Patents

Composant d'inductance Download PDF

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Publication number
WO2016013059A1
WO2016013059A1 PCT/JP2014/069346 JP2014069346W WO2016013059A1 WO 2016013059 A1 WO2016013059 A1 WO 2016013059A1 JP 2014069346 W JP2014069346 W JP 2014069346W WO 2016013059 A1 WO2016013059 A1 WO 2016013059A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
bias applying
magnetic bias
ferrite core
applying members
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2014/069346
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English (en)
Japanese (ja)
Inventor
元 大學
七郎 船越
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shindengen Electric Manufacturing Co Ltd
Original Assignee
Shindengen Electric Manufacturing Co Ltd
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 Shindengen Electric Manufacturing Co Ltd filed Critical Shindengen Electric Manufacturing Co Ltd
Priority to PCT/JP2014/069346 priority Critical patent/WO2016013059A1/fr
Publication of WO2016013059A1 publication Critical patent/WO2016013059A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core

Definitions

  • the present invention relates to an inductance component.
  • a choke coil used for a switching power supply for example, an alternating current is usually applied by being superimposed on a direct current.
  • the ferrite core used for these choke coils is required to have good permeability characteristics that do not cause magnetic saturation with respect to this DC superposition.
  • Ferrite cores and metal dust cores are used as magnetic cores for high frequencies.
  • the ferrite core has a high initial permeability and a low saturation magnetic flux density
  • the metal-based dust core has a feature derived from material properties such as a low initial permeability and a high saturation magnetic flux density. For this reason, metal-based dust cores are often used without a magnetic airspace due to the toroidal shape, etc.
  • a magnetic air gap is formed in the middle leg of the E-type core to provide direct current superposition. Often avoids magnetic saturation.
  • metal-based dust cores are expensive and expensive to manufacture.
  • a magnetic bias applying member such as a permanent magnet is disposed in the gap provided in the magnetic path of the ferrite core to cancel the magnetic field due to DC superposition, that is, to apply a magnetic bias to the ferrite core. It has been proposed (see Patent Document 1). According to the magnetic bias method using the magnetic bias applying member, the available ⁇ B (magnetic flux density) region can be increased by applying the magnetic bias in the reverse direction using the magnetic bias applying member. .
  • the present invention has been made in view of these points, and provides an inductance component having a ferrite core that can suppress core loss of the ferrite core while maintaining high DC superposition characteristics.
  • the inductance component according to the present invention is: A ferrite core body having three or more gaps in the magnetic path; Three or more magnetic bias applying members disposed in the gap and providing a magnetic bias; With The magnetic bias applying member is disposed in each gap.
  • the inductance component according to the present invention is: Comprising four or more magnetic bias applying members,
  • the ferrite core body is provided with four or more gaps in the magnetic path,
  • the magnetic bias applying member may be disposed in each gap.
  • the gaps are evenly arranged;
  • the distance between each member for applying a magnetic bias arranged in the gap may be the same.
  • the gap may be provided line-symmetrically or point-symmetrically, and the magnetic bias applying member arranged in the gap may be arranged line-symmetrically or point-symmetrically.
  • the number of the air gap and the magnetic bias applying member disposed in the air gap may be 10 or less.
  • the magnetic bias applying member may be a permanent magnet.
  • the inductance component of the present invention includes a ferrite core body in which three or more gaps are provided in a magnetic path, and three or more magnetic bias applying members that are disposed in the gap and provide a magnetic bias.
  • a magnetic bias applying member is disposed in each gap. For this reason, the core loss of the ferrite core can be suppressed while maintaining high DC superposition characteristics.
  • FIG. 1A is a perspective view showing a ferrite core employed in the first embodiment of the present invention
  • FIG. 1B shows an inductance component according to the first embodiment of the present invention. It is a perspective view.
  • FIG. 2 is a perspective view showing a ferrite core employed in a modification of the first embodiment of the present invention.
  • FIG. 3 is a perspective view showing a ferrite core employed in another modification of the first embodiment of the present invention.
  • FIG. 4 is a graph showing the relationship between the number of installed magnetic bias applying members and the effective magnetic permeability in the first embodiment of the present invention.
  • FIG. 5 is a graph showing the relationship between the number of installed magnetic bias applying members and the length of each magnetic bias applying member in the first embodiment of the present invention.
  • FIG. 6 is a graph showing the relationship between the number of installed magnetic bias applying members and the core loss in the first embodiment of the present invention.
  • FIG. 7 is a graph showing the DC superimposition characteristics in the first embodiment of the present invention.
  • FIG. 8 shows the relationship between the number of installed magnetic bias applying members and the DC superposition characteristics (the value of the magnetic field H when the effective permeability is reduced by 20% from the initial value) in the first embodiment of the present invention. It is the graph which showed.
  • FIG. 9A is a perspective view showing an inductance component according to the second embodiment of the present invention
  • FIG. 9B is a cross-sectional view taken along the line BB in FIG. 9A. It is a longitudinal cross-sectional view.
  • FIG. 10 is a longitudinal sectional view showing the direction of a magnetic field generated by a current flowing through a conducting wire and the direction of a magnetic field generated by a magnetic bias applying member in an inductance component according to a second embodiment of the present invention. It is.
  • FIG. 1 to FIG. 8 are diagrams for explaining the present embodiment.
  • the inductance component includes a ferrite core 10 having a toroidal shape (ring shape) and a conductive wire 20 attached to the ferrite core 10.
  • a magnetic field is generated in the ferrite core 10 so as to go around the ferrite core 10 once.
  • the ferrite core 10 is formed with one closed magnetic path.
  • the “DC superposition characteristic” means a characteristic that the ferrite core 10 is magnetically saturated when the DC superposition current becomes large, and as a result, the inductance value decreases. Therefore, “high DC superposition characteristics” means that the ferrite core 10 is hard to be magnetically saturated even when the DC superposition current increases.
  • the ferrite core 10 in the present embodiment has an inner diameter of 20 mm to 26 mm (for example, 23 mm), an outer diameter of 33 mm to 39 mm (for example, 36 mm), and a height of 12 mm to 18 mm (for example, 15 mm). ing.
  • the conductive wire 20 made of, for example, copper is attached to the ferrite core 10 by being spirally wound around the ferrite core 10.
  • the ferrite core 10 in the present embodiment is provided in the ferrite core body 11 in which three or more gaps 11a (four gaps 11a in the embodiment shown in FIG. 1) are provided in the magnetic path, and in each gap 11a. And three or more magnetic bias applying members 15 for applying a magnetic bias.
  • the air gap 11a is provided to prevent magnetic saturation.
  • the magnetic bias applying member 15 is made of a material different from that of the ferrite core body 11.
  • the ferrite core body 11 for example, a powder formed by compressing and molding a powder containing iron oxide as a main component and then firing the powder can be used. You may use what was formed by compression-molding material powder and a binder.
  • the soft magnetic material powder an appropriate one such as FeSiCr powder, FeSi powder, carbonyl iron powder, sendust powder, permalloy powder or amorphous material powder can be used.
  • the size of the ferrite core body 11 can be adjusted as appropriate.
  • the magnetic bias applying member 15 is formed, for example, by molding a composite magnetic material containing hard magnetic material powder, soft magnetic material powder and a binder into a flat plate shape. Specifically, the composite magnetic material is formed by compression molding (for example, press molding). The magnetic bias applying member 15 is a bonded magnet made of a permanent magnet, for example.
  • the composite magnetic material may contain alumina (Al 2 O 3 ) powder, aluminum nitride (AlN) powder, or the like as an additive for heat dissipation.
  • the ratio of the hard magnetic material powder to the total of the hard magnetic material powder and the soft magnetic material powder is in the range of 20 wt% to 90 wt%, preferably in the range of 50 wt% to 90 wt%. For example, 80 wt%.
  • the average particle size of the hard magnetic material powder is in the range of several tens of ⁇ m to several hundreds of ⁇ m, for example, about 150 ⁇ m.
  • the hard magnetic material powder for example, samarium cobalt (SmCo) powder can be used, but any magnetic material powder having a high coercive force may be used. For this reason, for example, hard magnetic material powder such as samarium iron nitrogen (SmFeN) powder, neodymium iron boron (NdFeB) powder, or ferrite powder can be used.
  • the ratio of the hard magnetic material powder to the total of the hard magnetic material powder and the soft magnetic material powder when the ratio of the hard magnetic material powder to the total of the hard magnetic material powder and the soft magnetic material powder is less than 20 wt%, the ratio of the hard magnetic material powder is too small, so that the magnetic bias A sufficient magnetic force cannot be obtained as the application member 15.
  • the ratio of the hard magnetic material powder to the total of the hard magnetic material powder and the soft magnetic material powder exceeds 90 wt%, the ratio of the hard magnetic material powder is increased, so that for other conventional magnetic bias application As in the case of the member 15, when trying to manufacture a relatively thin magnetic bias applying member 15, it becomes difficult to manufacture the magnetic bias applying member 15 having a small thickness variation.
  • the ratio of the soft magnetic material powder to the total of the hard magnetic material powder and the soft magnetic material powder is in the range of 10 wt% to 80 wt%, preferably in the range of 10 wt% to 50 wt%. For example, 20 wt%.
  • the soft magnetic material powder a soft magnetic material powder whose surface is covered with a silica film (insulated) can be used.
  • the average particle diameter of the soft magnetic material powder is in the range of several tens of ⁇ m to several hundreds of ⁇ m, for example, about 150 ⁇ m.
  • FeSiCr powder can be used, but any magnetic material powder having a high magnetic permeability may be used. For this reason, for example, FeSi powder, ferrite powder, carbonyl iron powder, sendust powder, permalloy powder, or amorphous material powder can be used.
  • the ratio of the soft magnetic material powder to the total of the hard magnetic material powder and the soft magnetic material powder is less than 10 wt%, the ratio of the hard magnetic material powder is increased, and thus other conventional magnetic materials are used.
  • the bias applying member 15 when trying to manufacture a relatively thin magnetic bias applying member 15, it becomes difficult to manufacture the magnetic bias applying member 15 having a small thickness variation.
  • the ratio of the soft magnetic material powder to the total of the hard magnetic material powder and the soft magnetic material powder exceeds 80 wt%, the ratio of the hard magnetic material powder is too small, so that the magnetic bias applying member 15 is sufficient. Cannot obtain a strong magnetic force.
  • the binder in the composite magnetic material is made of a polymer and has a function of joining the hard magnetic material powder and the soft magnetic material powder.
  • the binder content in the composite magnetic material also varies depending on the method of manufacturing the magnetic bias applying member 15. For example, when the magnetic bias applying member 15 is manufactured by press molding a composite magnetic material, it is preferably in the range of 1 wt% to 5 wt%, for example 3 wt%.
  • a thermosetting resin or a thermoplastic resin can be used. More specifically, for example, an epoxy resin, a polyimide resin, a polyamideimide resin, a silicone resin, a phenol resin, or the like can be used as the binder.
  • the magnetic bias applying member 15 is formed by press molding the composite magnetic material
  • the binder content in the composite magnetic material is less than 1 wt%, the ratio of the binder is too small and hard magnetic It is difficult to join between the material powder and the soft magnetic material powder.
  • the content of the binder in the composite magnetic material exceeds 5 wt%, the content of the hard magnetic material powder and the soft magnetic material powder is reduced, so that the relative permeability of the magnetic bias applying member 15 is reduced,
  • the magnetic flux density range ⁇ B that does not reach the saturation magnetic flux density may be smaller than other conventional ferrite core bodies 11.
  • the magnetic bias applying member 15 is arranged so that the direction of the magnetic field generated in the magnetic bias applying member 15 is opposite to the direction of the magnetic field generated when a current flows through the conductive wire 20 (that is, on the conductive wire 20).
  • the magnetic bias is applied in the direction opposite to the magnetic field generated by the flow of current.
  • the gaps 11a are evenly arranged.
  • the magnetic bias applying members 15 arranged in the gap 11a are evenly arranged, and the distances between the magnetic bias applying members 15 are the same.
  • the gap 11a is provided with line symmetry and point symmetry.
  • the magnetic bias applying members 15 arranged in the gap 11a are arranged in line symmetry and point symmetry.
  • a ferrite core main body 11 having four air gaps 11a provided in a magnetic path, four magnetic bias applying members 15 disposed in the air gaps 11a and providing a magnetic bias
  • the present invention is not limited to this. That is, the ferrite core 10 including the ferrite core body 11 provided with three gaps 11a in the magnetic path and the three magnetic bias applying members 15 disposed in the gaps 11a and applying a magnetic bias is provided. It may be used. Also, a ferrite core comprising a ferrite core body 11 having five or more air gaps 11a provided in the magnetic path, and five or more magnetic bias applying members 15 disposed in the air gaps 11a and applying a magnetic bias. 10 may be used.
  • the ferrite core body 11 is provided with eight gaps 11 a in the magnetic path, and eight magnetic bias applying members 15 that are disposed in the gaps 11 a and provide a magnetic bias are provided.
  • a ferrite core 10 is shown.
  • a ferrite core main body 11 having 10 gaps 11 a provided in a magnetic path, and 10 magnetic bias applying members 15 that are arranged in the gaps 11 a and provide a magnetic bias are provided.
  • a ferrite core 10 is shown.
  • the gaps 11a are evenly arranged.
  • the magnetic bias applying members 15 arranged in the gap 11a are evenly arranged, and the distances between the magnetic bias applying members 15 are the same.
  • the air gap 11a is provided with line symmetry and point symmetry.
  • the magnetic bias applying members 15 arranged in the gap 11a are arranged in line symmetry and point symmetry.
  • the gap 11a is not necessarily provided in line symmetry and point symmetry.
  • the magnetic bias applying member 15 is arranged line-symmetrically but may not be arranged point-symmetrically.
  • the magnetic bias applying member 15 is arranged point-symmetrically but line-symmetrically. It may not be arranged.
  • the magnetic bias applying member 15 is not arranged line-symmetrically and may not be arranged point-symmetrically.
  • a ferrite core body 11 having four magnetic saturation prevention gaps 11a formed in a magnetic path is prepared.
  • four gaps 11a may be formed after forming a ring-shaped ferrite core body part having no gap 11a, or four ferrite core body parts in consideration of the gap 11a in advance. And four gaps 11a may be formed by combining four ferrite core body parts.
  • the ferrite core 10 is manufactured by disposing the magnetic bias applying member 15 in the gap 11 a in the ferrite core body 11.
  • the inductance component according to the present embodiment is manufactured by attaching the conductive wire 20 to the ferrite core 10 thus manufactured (see FIG. 1B).
  • a hard magnetic material powder, a soft magnetic material powder and a binder are uniformly kneaded at a predetermined ratio and then granulated to produce a composite magnetic material.
  • the composite magnetic material is dried to volatilize the solvent component in the binder.
  • the composite magnetic material is sieved, and only the composite magnetic material having a particle size suitable for molding (within a range of several tens to several hundreds of ⁇ m) is recovered.
  • a compact is produced by molding the composite magnetic material into a flat plate shape. Specifically, a composite magnetic material is deposited in a molding space and press-molded to produce a molded body.
  • the pressing pressure in the press molding is, for example, in the range of 3 ton / cm 2 to 10 ton / cm 2 .
  • the temperature at the time of press molding shall be room temperature.
  • the molded body is heated to cure the binder.
  • the temperature and time which heat a molded object are based also on the kind of binder, it shall be 1 hour at 150 degreeC, for example.
  • the molded body in which the binder is cured is magnetized to obtain a magnetic bias applying member 15.
  • the molded body obtained by curing the binder is magnetized using a pulse magnetizing apparatus. In this way, the magnetic bias applying member 15 can be manufactured.
  • FIG. 4 is a graph showing the relationship between the number of installed magnetic bias applying members 15 and the effective magnetic permeability.
  • FIG. 4 shows an aspect in which a permanent magnet is used as the magnetic bias applying member 15 and the total length of the permanent magnet is 5 mm.
  • the case where the number of the magnetic bias applying members 15 is 1, 2, 4, (see FIG. 1), 8 (see FIG. 2), and 10 (see FIG. 3) is plotted. Yes.
  • the length of each permanent magnet when the number of magnetic bias applying members 15 is 1, 2, 4, (see FIG. 1), 8 (see FIG. 2), and 10 (see FIG. 3).
  • the lengths are 5 mm, 2.5 mm, 1.25 mm, 0.625 mm, and 0.5 mm, respectively.
  • FIG. 4 shows an aspect in which a permanent magnet is used as the magnetic bias applying member 15 and the total length of the permanent magnet is 5 mm.
  • the number of the magnetic bias applying members 15 is 1, 2, 4, (see FIG. 1), 8 (see FIG. 2), and 10 (see FIG.
  • the effective magnetic permeability is increased by setting the number of the magnetic bias applying members 15 to 3 or more as compared with the case where the number of the magnetic bias applying members 15 is one. Can be greatly reduced. Furthermore, by making the number of the magnetic bias applying members 15 four or more, the effective magnetic permeability can be reduced to half or less as compared with the case where the number of the magnetic bias applying members 15 is one. The effective magnetic permeability can be reduced more greatly. More specifically, when the number of magnetic bias applying members 15 is one, the effective magnetic permeability, which is about 70 ⁇ e, is 30 ⁇ e or less by setting the number of magnetic bias applying members 15 to four or more. can do.
  • the effective magnetic permeability cannot be reduced so efficiently, and the effect obtained when the number of the magnetic bias applying members 15 is 10 is effective. There is no significant difference between the magnetic permeability and the effective magnetic permeability when the number of magnetic bias applying members 15 is increased beyond that (for example, when the number of magnetic bias applying members 15 is 11).
  • FIG. 5 shows the relationship between the number of installed magnetic bias applying members 15 and the length of each magnetic bias applying member 15.
  • FIG. 5 shows the total length of the permanent magnet when a permanent magnet is used as the magnetic bias applying member 15 and the effective permeability is 40 ⁇ e.
  • the number of magnetic bias applying members 15 is one, two, four (see FIG. 1), eight (see FIG. 2), and ten (see FIG. 3). The case is plotted.
  • the total number of permanent magnets when the number of magnetic bias applying members 15 is 1, 2, 4, (see FIG. 1), 8 (see FIG. 2), and 10 (see FIG. 3).
  • the lengths are about 7 mm, about 5 mm, about 3.6 mm, about 3 mm, and about 3 mm, respectively.
  • the total length of the permanent magnets is greatly shortened by setting the number of the magnetic bias applying members 15 to three or more. be able to. Furthermore, the total length of the permanent magnets can be dramatically shortened by setting the number of the magnetic bias applying members 15 to four or more. Specifically, by setting the number of the magnetic bias applying members 15 to 4 or more, the total length of the permanent magnets is reduced as compared with the case where the number of the magnetic bias applying members 15 is one. It can be less than half.
  • the total length of the permanent magnets which is about 7 mm
  • the number of the magnetic bias applying members 15 is four or more. About 3.6 mm or less.
  • the total length of the permanent magnets and the total length of the permanent magnets when the number of the magnetic bias applying members 15 is 10 are both about 3 mm.
  • the ferrite core 10 in the present embodiment has an inner diameter of 20 mm to 26 mm (for example, 23 mm), an outer diameter of 33 mm to 39 mm (for example, 36 mm), and a height of 12 mm to 18 mm (for example, 15 mm). ).
  • the inner diameter is 23 mm
  • the outer diameter is 36 mm
  • the height is 15 mm
  • the number of the magnetic bias applying members 15 is one, the size of the gap 11a to be formed is large.
  • FIG. 6 shows the relationship between the number of installed magnetic bias applying members 15 and the core loss.
  • FIG. 6 shows the core loss when a permanent magnet is used as the magnetic bias applying member 15 and the effective permeability is 40 ⁇ e. 6, as in FIG. 4, the number of magnetic bias applying members 15 is one, two, four (see FIG. 1), eight (see FIG. 2), and ten (see FIG. 3). The case is plotted.
  • the core loss can be greatly reduced by setting the number of the magnetic bias applying members 15 to three or more.
  • the core loss can be dramatically reduced by setting the number of the magnetic bias applying members 15 to four or more.
  • the core loss is reduced to about a quarter compared with the case where the number of the magnetic bias applying members 15 is one. be able to. More specifically, when the number of magnetic bias applying members 15 is one, the core loss is about 2500 mW / cm 3 , and when the number of magnetic bias applying members 15 is four or more, it is about 600 mW. / Cm 3 or less. On the other hand, even if the number of magnetic bias applying members 15 is further increased from eight, the core loss cannot be reduced so efficiently, and the core loss when the number of magnetic bias applying members 15 is eight; When the number of the magnetic bias applying members 15 is 10, the core loss of the permanent magnet is about 500 mW / cm 3 .
  • FIG. 7 is a graph showing the DC superposition characteristics, and the magnetic field H and the effective when the number of magnetic bias applying members 15 is 2, 4, (see FIG. 1) and 8 (see FIG. 2). It is the graph which showed the relationship with the magnetic permeability.
  • FIG. 8 shows the relationship between the number of installed magnetic bias applying members 15 and the DC superposition characteristics (the value of the magnetic field H when the effective permeability is reduced by 20% from the initial value).
  • FIG. 8 shows the DC superposition characteristics (the value of the magnetic field H when the effective permeability is reduced by 20% from the initial value) when a permanent magnet is used as the magnetic bias applying member 15 and the effective permeability is 40 ⁇ e. ing. 8, as in FIG. 4, the number of magnetic bias applying members 15 is one, two, four (see FIG.
  • the inductance component according to the present embodiment is arranged in the ferrite core body 11 in which three or more (preferably four or more) gaps 11a are provided in the magnetic path, and is disposed in the gap 11a. And 3 or more (preferably 4 or more) magnetic bias applying members 15 to be provided. A magnetic bias applying member 15 is disposed in each gap 11a.
  • the core loss of the ferrite core 10 can be suppressed while maintaining high DC superposition characteristics.
  • the gaps 11a are evenly arranged in the ferrite core body 11, the magnetic bias applying members 15 arranged in the gaps 11a are evenly arranged, and the magnetic bias applying members 15 are arranged.
  • the ferrite core body 11 is provided with the gap 11a in line symmetry and / or point symmetry, and the magnetic bias applying member 15 arranged in the gap 11a is arranged in line symmetry and / or point symmetry.
  • the core loss is substantially reduced to a lower limit (in FIG. 6, about 500 mW / cm 3). ) Can be lowered. For this reason, when the aspect which makes the number of the members 15 for magnetic bias application 15 6 or more is employ
  • the magnitude of the core loss is approximately the same when the number of the magnetic bias applying members 15 is eight and when the number is ten.
  • the number of the gaps 11a provided in the ferrite core main body 11 and the magnetic bias applying members 15 arranged in the gap 11a may be 10 or less.
  • the ferrite core body 11 having a toroidal shape is used.
  • the shape is not limited to such a shape.
  • the ferrite core 10 ′ of the second embodiment is a ferrite core body 11 ′ formed by overlapping two E-type cores as shown in FIGS. 9 (a), (b) and FIG. 10. It has.
  • a magnetic path is formed as shown in FIG.
  • the other configurations are substantially the same as those in the first embodiment.
  • the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the “solid line” indicated by reference sign D1 indicates the direction of the magnetic field generated by the current flowing through the conductor 20 ′
  • the “broken line” indicated by reference sign D2 indicates the direction of the magnetic field by the magnetic bias applying member 15. Show.
  • the inductance component is disposed in the ferrite core body 11 ′ in which three or more (preferably four or more) gaps 11′a are provided in the magnetic path, and in the gap 11′a. And three or more (preferably four or more) magnetic bias applying members 15 for applying a magnetic bias.
  • a magnetic bias applying member 15 is disposed in each gap 11'a. For this reason, the core loss of the ferrite core 10 ′ can be suppressed while maintaining high DC superposition characteristics.
  • the gaps 11′a are evenly arranged in the ferrite core body 11 ′, the magnetic bias applying members 15 arranged in the gaps 11′a are arranged uniformly, and the magnetic
  • the ferrite core body 11 ' is provided with the gap 11'a in line symmetry and / or point symmetry, and the magnetic bias applying member 15 disposed in the gap 11'a is line symmetrical and / or Alternatively, the core loss can be suppressed in a well-balanced manner by adopting an aspect of being arranged point-symmetrically. In addition, it is possible to maintain high DC superposition characteristics more stably.

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  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

Ce composant d'inductance comprend : un corps principal à noyau de ferrite (11), au moins trois entrefers (11a) étant prévus dans un chemin magnétique ; et au moins trois éléments de polarisation magnétique (15), qui sont disposés dans les entrefers (11a), et qui appliquent la polarisation magnétique. Les éléments de polarisation magnétique (15) sont disposés respectivement dans les entrefers (11a).
PCT/JP2014/069346 2014-07-22 2014-07-22 Composant d'inductance Ceased WO2016013059A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2014/069346 WO2016013059A1 (fr) 2014-07-22 2014-07-22 Composant d'inductance

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Application Number Priority Date Filing Date Title
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WO2016013059A1 true WO2016013059A1 (fr) 2016-01-28

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000150254A (ja) * 1998-11-10 2000-05-30 Tokin Corp 圧粉磁心
JP2011108981A (ja) * 2009-11-20 2011-06-02 Denso Corp リアクトル

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000150254A (ja) * 1998-11-10 2000-05-30 Tokin Corp 圧粉磁心
JP2011108981A (ja) * 2009-11-20 2011-06-02 Denso Corp リアクトル

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