WO2012128027A1 - 無線電力伝送用磁気素子及びその製造方法 - Google Patents
無線電力伝送用磁気素子及びその製造方法 Download PDFInfo
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- WO2012128027A1 WO2012128027A1 PCT/JP2012/055680 JP2012055680W WO2012128027A1 WO 2012128027 A1 WO2012128027 A1 WO 2012128027A1 JP 2012055680 W JP2012055680 W JP 2012055680W WO 2012128027 A1 WO2012128027 A1 WO 2012128027A1
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- power transmission
- magnetic
- wireless power
- magnetic element
- resin
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
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- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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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
- H01F17/043—Fixed inductances of the signal type with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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Definitions
- the present invention relates to a magnetic element for wireless power transmission that transmits power without contact.
- Patent Document 1 devices that operate by cordless power supply using electromagnetic induction, such as electric toothbrushes, cordless phones, and portable devices, are increasing (for example, Patent Document 1). Also, for wall-mounted televisions and personal computers, devices that operate by cordless power feeding using magnetic field resonance are being developed (for example, Patent Document 2). In these wireless power transmission technology fields, magnetic elements for wireless power transmission that can be fed with high power and high power transmission efficiency have been developed and proposed.
- a planar coil conductor serving as a heat source is covered with a magnetic layer, and a heat transfer conductor layer provided on the magnetic layer is interposed. It is also possible to adopt a configuration of a coil-embedded substrate that radiates heat to the outside. According to this, the heat generated in the planar coil can surely be dissipated to the outside.
- planar coil itself is covered with a magnetic layer, the magnetic field is blocked, and is not suitable for use in a magnetic element for wireless power transmission using electromagnetic induction or magnetic resonance.
- a planar coil and a heat transfer conductor layer must be incorporated in the magnetic layer, labor is required in the manufacturing process.
- an object of the present invention is to provide a magnetic element for wireless power transmission capable of supplying power with high power transmission efficiency while improving heat dissipation, and a method for manufacturing the same.
- One of the inventions for solving the above-described problems is a magnetic element for wireless power transmission that causes an induced electromotive force, and includes a conductor part through which an alternating current flows and a magnetic body part arranged in parallel to the conductor part.
- the magnetic body part has a resin in which magnetic particles are dispersed, and at least a part of the magnetic body part is joined and integrated with the conductor part in an electrically insulated state. To do.
- the conductor portion and the magnetic body portion are integrated by bonding, so that even when the conductor portion and the magnetic body portion receive external force such as vibration or impact, the conductor portion and Since the positional relationship of the magnetic body portions can be maintained in the initial state, the initial high power transmission efficiency can be maintained over a long period of time. Also, when the conductor part generates heat, the heat of the conductor part is efficiently transferred to the magnetic body part through the part where the conductor part is integrally joined. Can do. Thereby, the electric energy which supplies with electricity can be increased rather than the case where the conductor part and the magnetic body part are separated.
- the transmission amount can be increased while preventing overheating of the conductor portion with a simple configuration in which at least a part of the conductor portion and the magnetic body portion are integrated. Further, since the handling of the conductor portion and the magnetic body portion becomes easy, the work for assembling into various devices and storage becomes easy, and the manufacturing process of the magnetic element for wireless power transmission can be simplified.
- One of the inventions for solving the above problems is a magnetic element for wireless power transmission, wherein the resin is a thermosetting resin.
- one of the inventions for solving the above-mentioned problems is a magnetic element for wireless power transmission, wherein the resin is a thermoplastic resin.
- the heating process for softening the thermoplastic resin is added to the manufacturing process of the wireless power transmission magnetic element, the softened thermoplastic resin is sealed between the conductor parts, and the conductor part and the magnetic body are cooled by cooling. Since the joining state with the part can be fixed, simplification of the manufacturing process can be easily realized.
- One of the inventions for solving the above problems is a magnetic element for wireless power transmission, wherein the magnetic particles are soft magnetic particles.
- One of the inventions for solving the above problems is a magnetic element for wireless power transmission, wherein the soft magnetic particles are metal-based magnetic particles.
- the metal-based magnetic particles exhibit high magnetic permeability, the magnetic body portion can be held with high magnetic shielding rate.
- one of the inventions for solving the above-mentioned problems is a magnetic element for wireless power transmission, wherein the metallic magnetic particles are amorphous particles.
- the magnetic body portion can be thinned and held with a sufficiently high magnetic shielding rate.
- One of the inventions for solving the above-mentioned problems is a wireless power transmission magnetic element characterized in that a plurality of grooves are formed in the magnetic body portion.
- the surface area of the magnetic body portion increases, so that the heat dissipation can be enhanced.
- One of the inventions for solving the above problems is a method of manufacturing a magnetic element for wireless power transmission, comprising: a magnetic particle dispersion step of dispersing magnetic particles in a resin; and a resin in which the magnetic particles are dispersed.
- the magnetic particles are dispersed in the resin, the magnetic particles can be easily dispersed evenly in the resin.
- the resin is heated to be in the B stage state, when the conductor portion and the B stage resin are superimposed and pressed, the conductor portion and the B stage resin can be brought into close contact with each other and bonded. . That is, they can be integrated by joining the conductor portion and the B-stage resin. Then, by curing the B-stage resin bonded to the conductor portion, the manufactured wireless power transmission magnetic element can be fixed in a state where the conductor portion and the resin containing magnetic particles are integrated. .
- One of the inventions for solving the above problems is a method of manufacturing a magnetic element for wireless power transmission, wherein a plurality of grooves are formed in the B-stage resin in the pressurizing step.
- the surface area of the resin in which the magnetic particles are dispersed can be increased by forming a plurality of grooves in the resin, the heat dissipation can be improved.
- One of the inventions for solving the above-mentioned problems is that, in the pressurizing step, the conductor part molded body in which a gap exists between adjacent conductor parts and the B-stage resin are superposed and pressed. It is the manufacturing method of the magnetic element for wireless power transmission characterized by joining.
- the B-stage resin when the conductor part molded body having a gap between adjacent conductor parts and the B-stage resin are pressed and superimposed, the B-stage resin enters the gap and faces the gap.
- the B-stage resin can be adhered and bonded to the wall surface of the conductor portion.
- the resin is a thermosetting resin
- the B-staged thermosetting resin is cured by heat treatment.
- the bonding state between the conductor portion and the resin can be fixed only by performing a heat treatment for curing the thermosetting resin.
- the resin is a thermoplastic resin
- the thermoplastic resin softened by heat treatment is sealed between the conductor portions and cooled. It is a manufacturing method of the magnetic element for wireless power transmission characterized by fixing by solidifying.
- thermoplastic resin softened by heat treatment can be sealed between the conductor parts and cooled and solidified, the bonding state between the conductor part and the magnetic body part can be fixed. Simplification of the curing process can be easily realized.
- FIG. (B) It is a graph which shows the power transmission efficiency of the magnetic element for wireless power transmission. It is explanatory drawing which shows the structure at the time of measuring the surface temperature of the magnetic element for wireless power transmission.
- A It is a figure which shows the measurement result of the surface temperature of the magnetic element for wireless power transmission which concerns on Example 3.
- FIG. (B) It is a figure which shows the measurement result of the surface temperature of the planar coil which concerns on the comparative example 2.
- FIG. (C) It is a figure which shows the measurement result of the surface temperature of the planar coil which concerns on the comparative example 3.
- FIG. (D) It is a figure which shows the measurement result of the surface temperature of the magnetic element for wireless power transmission which concerns on the comparative example 4.
- the magnetic elements 1 and 2 for wireless power transmission are configured to cause an induced electromotive force by magnetic coupling, and can be used for both power feeding and power receiving.
- the magnetic element 1 for wireless power transmission can be applied to a power supply device used for powering a mounting type device such as a personal computer or a mouse that operates by cordless power supply using electromagnetic induction. is there.
- the wireless power transmission magnetic element 1 can also be applied to wall-mounted devices such as wall-mounted thin TVs that operate by cordless power supply using magnetic field resonance, power supply devices used for power supply of electric vehicles, and the like. .
- the magnetic element 2 for wireless power transmission is mounted on a device such as a personal computer or a mouse placed on or in contact with the power supply device described above, a wall-mounted device such as a wall-mounted thin TV, or an electric device. Applicable to automobiles.
- the above-described magnetic element 1 for wireless power transmission for power feeding includes a planar coil 3 (conductor portion) through which an alternating current flows and a planar surface as shown in the AA ′ sectional view of FIG.
- the power receiving wireless power transmission magnetic element 2 has the same configuration.
- the conductor part 3 through which the alternating current flows includes, for example, a spiral type or solenoid type coil.
- the magnetic body portion 5 is arranged in parallel to the conductor portion 3 to be magnetic in a cross section that coincides with the magnetic coupling direction of the power feeding wireless power transmission magnetic element 1 and the power receiving wireless power transmission magnetic element 2.
- the state in which the body part 5 is arranged adjacent to the conductor part 3 is said.
- the magnetic coupling direction refers to the side to be magnetically coupled as in the case where the center portions of the same size wireless power transmission magnetic element 1 for power feeding and the magnetic power transmission magnetic element 2 for power reception are opposed to each other.
- the initial high power transmission efficiency can be maintained over a long period of time.
- the planar coil 3 generates heat
- the heat of the planar coil 3 is efficiently transferred to the magnetic body part 5 through the part where the planar coil 3 is integrally joined. It can dissipate heat well. Thereby, the electric energy which supplies with electricity can be increased rather than the case where the plane coil 3 and the magnetic body part 5 are spaced apart.
- the transmission amount can be increased while preventing overheating of the planar coil 3 with a simple configuration in which at least a part of the planar coil 3 and the magnetic body portion 5 are integrated. Furthermore, since the handling of the planar coil 3 and the magnetic body portion 5 becomes easy, it is easy to install and store in various devices, and the manufacturing process of the magnetic element 1 for wireless power transmission is simplified. Can do.
- the above-described magnetic element 1 for wireless power transmission for power feeding includes a planar coil 3 (conductor portion) through which an alternating current flows and a cross-sectional view taken along the line AA ′ in FIGS.
- the planar coil 3 and the magnetic body portion 5 adjacent to the planar coil 3 are arranged in parallel in a direction orthogonal to the magnetic coupling direction.
- the magnetic part 5 is made of a resin in which magnetic particles are dispersed, and at least a part of the magnetic part 5 is joined and integrated with the planar coil 3 in an electrically insulated state.
- the wireless power transmission magnetic element 2 for receiving power has the same configuration and will not be described below.
- the “orthogonal direction” is a level that is almost orthogonal.
- the flat coil 3 has a coil inner diameter of 5 mm ⁇ and a coil outer diameter of 43 mm ⁇ that is obtained by winding a round copper wire (with an insulating coating) with a wire diameter of 500 ⁇ m ⁇ in a spiral shape so that a gap B of 500 ⁇ m is formed between the copper wires. It is formed as a planar coil.
- the planar coil 3 should just be metal materials, such as Cu and Al.
- the configuration of the planar coil 3 described above is merely an example, and the shape and size of the copper wire, the size of the gap, the number of turns, and the like can be changed as appropriate.
- the planar coil 3 of the magnetic element 1 for wireless power transmission on the power feeding side has one end on the outer peripheral side and the other end on the inner peripheral side connected to a pair of terminals not shown.
- the pair of terminals are connected to the power supply device so that AC power can be supplied to the planar coil 3 at an arbitrary frequency.
- the planar coil 4 of the magnetic element 2 for wireless power transmission on the power receiving side is also connected to a pair of terminals (not shown) at one end on the outer peripheral side and the other end on the inner peripheral side.
- the pair of terminals is directly connected to the driving device or connected to the rectifier. When connected to a rectifier, the rectifier is used for smoothing AC power formed by electromagnetic induction into DC power to charge a battery or for operating a drive device.
- the magnetic body portion 5 is formed in a sheet shape of 600 ⁇ m thickness having a square shape with a side of 50 mm, and the planar coil 3 is filled so as to fill a gap B of 500 ⁇ m provided in the planar coil 3 as shown in FIG. Are closely attached to the wall surface 3a.
- the planar coil 3 and the magnetic body portion 5 are alternately arranged in parallel in a direction orthogonal to the magnetic coupling direction. ing.
- the magnetic body portion 5 is joined and integrated with the planar coil 3 in an electrically insulated state.
- the configuration of the magnetic body portion 5 described above is an exemplification, and the shape, size, gap size, and the like can be changed as appropriate.
- the wireless power transmission magnetic element 1 has a part of the planar coil 3 exposed on the surface 5 a of the sheet-like magnetic body 5, and faces the device on the power receiving side or the power feeding side. It has a front surface 5a and a back surface 5b that can be a magnetic open surface.
- the magnetic part 5 is made of a resin in which magnetic particles are dispersed.
- the epoxy resin 10 which is a thermosetting resin is used as the resin, but it is not particularly limited as long as it does not deteriorate in a high temperature storage test or a high temperature high humidity storage test after being cured. Can be preferably used.
- an epoxy resin glycidylamine type epoxy resin, bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, biphenyl type epoxy resin, naphthalene type epoxy resin, aliphatic epoxy resin , Halogenated epoxy resins and the like, and are used alone or in combination of two or more.
- thermosetting resin examples include phenol resin, melamine resin, vinyl ester resin, cyano ester resin, maleimide resin, and thermosetting acrylic resin. Alternatively, two or more types may be used in combination.
- phenol resin is added to the epoxy resin 10 as an epoxy curing agent.
- the phenol resin has an effect as a curing agent for the epoxy resin, and examples thereof include phenol novolak, naphthol novolak, and biphenyl novolak. These may be used alone or in combination of two or more.
- the mixing ratio of the epoxy resin 10 and the phenol resin is preferably such that the hydroxyl group equivalent in the phenol resin is 0.5 to 2.0 equivalents per equivalent of the epoxy group in the epoxy resin. More preferably, it is 0.8 to 1.2 equivalents.
- an elastic body, a curing accelerator, or the like may be added to the resin constituting the magnetic body portion 5.
- Examples of elastic bodies include rubber components conventionally used for epoxy resin adhesives such as acrylonitrile-butadiene rubber (NBR) and acrylic rubber, acrylic resins, phenoxy resins, polyamide resins, and the like. Used together. From the viewpoint of sheet flexibility, it is preferable to use NBR or acrylic rubber, particularly preferably 5% by weight or more, more preferably 5 to 30% by weight, and particularly preferably 5 to 20% by weight.
- NBR acrylonitrile-butadiene rubber
- acrylic rubber particularly preferably 5% by weight or more, more preferably 5 to 30% by weight, and particularly preferably 5 to 20% by weight.
- Examples of the curing accelerator used together with the epoxy resin 10 and the phenol resin include amine type and phosphorus type.
- examples of the amine type include imidazoles such as 2-imidazole, triethanolamine, and the like.
- Examples of the phosphorus type include triphenylphosphine and tetraphenylphosphonium. These may be used alone or in combination of two or more.
- the blending amount of the curing accelerator is preferably set to a ratio of 0.1 to 2% by weight of the entire epoxy resin composition. Furthermore, when considering the fluidity of the epoxy resin composition, it is particularly preferably 0.15 to 0.35% by weight.
- epoxy curing agent in addition to the above epoxy resin, epoxy curing agent, elastic body, and curing accelerator, pigments, silane coupling agents, dispersants, antifoaming agents, flame retardants, ions, and the like within a range that does not deteriorate the various characteristics of the magnetic part 5.
- Various conventionally known additives such as trapping agents may be added.
- Magnetic part 5 magnetic particles
- magnetic particles are dispersed in the resin.
- soft magnetic particles are used.
- metallic magnetic particles are preferable.
- metal-based magnetic particles amorphous particles are preferable.
- spherical finemet manufactured by Hitachi Metals is used as the magnetic particles as iron-based amorphous particles. Since the iron-based amorphous particles to which this fine met belongs do not have a crystal structure and exhibits a high magnetic permeability, the magnetic part 5 can be made thin and held with a sufficiently high magnetic shielding rate.
- the soft magnetic particles are not particularly limited, and examples include permalloy particles, silicon steel particles, and iron magnetic particles.
- an iron-type magnetic particle if it shows high magnetic permeability and high heat conductivity, it can be used conveniently, without being limited.
- Any of Fe-Al based alloys such as Alpalm, Fe-Si based alloys such as silicon steel, or Fe-Al-Si based alloys such as Sendust, and mixed powders thereof can be used.
- any one of Fe-Ni alloy, Fe-Ni-Mo alloy, Fe-Ni-Mo-Cu alloy or Fe-Ni-Mo-Mn alloy, which is a permalloy alloy, or a mixed powder thereof Can be used.
- Fe-Zr-B alloys, Fe-Zr-Nb-B alloys, Fe-Zr-Cu-B, Fe-Si-B-Nb-Cu alloys that exhibit high magnetic permeability in nanocrystalline materials Any one of Fe—Co—Si—B—Nb—Cu based alloys, or a mixed powder thereof can be used.
- Amorphous particles include amorphous alloys such as Fe-B-Si alloys, Fe-Co-Si-B alloys, Fe-B-Si-C alloys, Fe-Co-Ni-Si-B alloys. Any alloy or mixed powder thereof can be used.
- the shape of the magnetic particles is spherical particles
- spherical magnetic particles having an average particle diameter of 1 ⁇ m to 300 ⁇ m, preferably 20 ⁇ m to 50 ⁇ m are mixed so that the amount added to the resin is 50 Vol% to 90 Vol%.
- the reason why the average particle size of the spherical particles is in the above range is that if the particle size is too small, the influence of the demagnetizing field becomes significant, the magnetic permeability is deteriorated, and good absorption characteristics cannot be obtained. Conversely, when the particle size is too large, the thickness of the magnetic body portion 5 cannot be reduced, and the smoothness of the surface of the magnetic body portion 5 may be inferior.
- the amount of the flat magnetic particle having a particle size of 50 ⁇ m or less and an aspect ratio of 10 or more added to the resin is 20 to 70 vol%, preferably 30 to 60 Vol%. Mix to be. If the particle size is smaller than 50 ⁇ m or the aspect ratio is smaller than 10, the influence of the demagnetizing field becomes significant and the magnetic field characteristics are inferior. Further, if the amount added to the resin is less than 20 vol%, excellent magnetic properties cannot be obtained, and if it is more than 70 vol%, the sheet becomes brittle.
- the magnetic element 1 for wireless power transmission is compared with the case where the magnetic body portion 5 is not arranged in parallel in the gap of the planar coil 3, It is possible to reduce the magnetic field ineffective for magnetic coupling around the planar coil 3 and to suppress the spread of the entire magnetic field. As a result, the magnetic element 1 for wireless power transmission can increase the magnetic flux density toward the magnetic element 2 for wireless power transmission on the power receiving side. Thus, the wireless power transmission magnetic element 1 can supply power to the wireless power transmission magnetic element 2 with high power transmission efficiency.
- the magnetic field generated by the flow of the alternating current to the planar coil 3 crosses with the other planar coils 3 arranged in parallel to generate an induced current.
- the phenomenon that the induced current acts as a resistance can be suppressed by the magnetic body portion 5 provided in the gap B of the planar coil 3. Thereby, it is possible to supply and receive power with high power transmission efficiency by high magnetic flux density and reduction of resistance due to induced current.
- the heat of the planar coil 3 is efficiently transferred to the magnetic body portion 5 through the wall surface 3a joined integrally with the magnetic body portion 5, so The heat of the planar coil 3 is efficiently radiated in the magnetic part 5 provided between the wires.
- the magnetic element 1 for wireless power transmission configured as described above is bonded closely to the wall surface 3a of the planar coil 3 so that the magnetic body portion 5 fills the gap B provided between the copper wires of the planar coil 3.
- the positional relationship between the planar coil 3 and the magnetic body portion 5 can be maintained in the initial state even when the planar coil 3 and the magnetic body portion 5 receive external forces such as vibration and impact.
- the initial high power transmission efficiency can be maintained over a long period of time.
- the heat of the planar coil 3 efficiently moves to the magnetic body part 5 through the wall surface 3a in which the magnetic body part 5 and the planar coil 3 are integrally joined.
- the heat of the planar coil 3 can be efficiently radiated in the magnetic part 5.
- the electric energy which supplies with electricity can be increased rather than the case where the plane coil 3 and the magnetic body part 5 are spaced apart.
- the transmission amount can be increased while preventing overheating of the planar coil 3 with a simple configuration in which the planar coil 3 and the magnetic body portion 5 are simply integrated by the wall surface 3 a of the planar coil 3.
- the handling of the planar coil 3 and the magnetic body portion 5 becomes easy, the assembling work and storage in various devices are facilitated.
- the magnetic part 5 having resin is easily deformed by an external force. Therefore, since the planar coil 3 and the magnetic part 5 can be joined with a relatively small external force, the manufacturing process of the wireless power transmission magnetic element 1 can be simplified.
- thermosetting resin used for the magnetic body portion 5
- the planar coil 3 and the magnetic body portion can be obtained simply by adding a heating process for curing the thermosetting resin to the manufacturing process of the magnetic element 1 for wireless power transmission. Since the joining state with 5 can be fixed, simplification of the manufacturing process can be easily realized.
- the compounding ratio of epoxy resin, acrylic rubber, phenol resin, curing accelerator, dispersant, and silane coupling agent is 55 parts by weight, 10 parts by weight, 35 parts by weight, 1 part by weight, 1 part by weight, and 1 part by weight, respectively.
- a container 20 containing methyl ethyl ketone (MEK) the solution was dissolved (liquefied).
- MEK methyl ethyl ketone
- methyl ethyl ketone which is a ketone solvent, is used as the organic solvent from the viewpoint of solubility.
- the fine met 11 as the iron-based amorphous particles is put in the container 20 containing the liquefied epoxy resin 10 so that the blending ratio becomes 700 parts by weight, and mixed by a disper (dispersing machine) to mix the epoxy resin 10. Finemet is dispersed inside (magnetic particle dispersion step).
- the liquefied epoxy resin 10 in which the fine met 11 is dispersed is applied to one side of the flat PET 24 whose surface is silicon-treated with an applicator 25 to a thickness of about 300 ⁇ m.
- the thickness of the liquefied epoxy resin 10 to be applied is not particularly limited, but is usually set to about 30 to 500 ⁇ m, preferably 50 to 300 ⁇ m from the viewpoint of film forming property.
- PET24 other plastic substrates such as polyester, polyamide, polyphenylene sulfide, polyimide, and polyethylene naphthalate, and these porous substrates, glass substrates such as glassine paper, high-quality paper, and Japanese paper, cellulose Metal film base materials such as non-woven fabrics such as polyamide, polyester, and aramid, copper foil, aluminum foil, SUS foil, and nickel foil may be used.
- plastic substrates such as polyester, polyamide, polyphenylene sulfide, polyimide, and polyethylene naphthalate
- glass substrates such as glassine paper, high-quality paper, and Japanese paper
- cellulose Metal film base materials such as non-woven fabrics such as polyamide, polyester, and aramid, copper foil, aluminum foil, SUS foil, and nickel foil may be used.
- the epoxy resin 10 applied to the surface of the PET 24 is dried at 110 ° C. for 12 minutes using a thermal dryer to form a B stage (B stage forming process).
- a thermal dryer to form a B stage (B stage forming process).
- an epoxy resin 10 having a B-stage shape on the surface of PET 24 and having a thickness of 250 ⁇ m is obtained.
- the temperature and time for drying with heat are adjusted depending on the type of resin used and the difference in the thickness of the resin to be applied.
- a plurality of B-stage epoxy resins 10 are stacked so as to have a desired thickness.
- two B-stage epoxy resins 10 are overlapped to have a thickness of 500 ⁇ m.
- another B-stage epoxy resin 10 is superimposed on the B-stage epoxy resin 10 on the surface of the PET 24.
- the planar coil 3 is superposed on the laminated B-stage epoxy resin 10.
- a planar PET 27 whose surface is silicon-treated is superimposed on the planar coil 3.
- the planar coil 3 (conductor portion molded body) is made of a round copper wire (with an insulating coating) having a wire diameter of 500 ⁇ m ⁇ in a spiral shape so that a gap B of 500 ⁇ m is formed between the copper wires. It is a flat coil with a coil inner diameter of 5 mm ⁇ and a coil outer diameter of 43 mm ⁇ .
- the plate 28 in which the PET 24, the laminated B-stage epoxy resin 10, the planar coil 3, and the PET 27 are stacked in this order is pressed from above and below (pressurizing step).
- a pressure-type vacuum laminator (V-130, manufactured by Nichigo Morton Co., Ltd.) was used, and after evacuating for 10 seconds at 3 hPa, the conditions were a temperature of 110 ° C., a pressure of 0.1 MPa, and a pressurization time of 90 seconds.
- the plate 28 is pressurized at.
- the pressure, pressurization time, and heating temperature are adjusted according to the type of resin used and the difference in resin thickness.
- the taken-out magnetic element 1 for wireless power transmission is post-cured (after-cured) at 150 ° C. for about 1 hour to thermally cure the B-stage epoxy resin 10 (curing step).
- the temperature and time are adjusted according to the difference in the type of resin used and the thickness of the resin.
- the magnetic element 1 for wireless power transmission has a flat plate shape embedded in a sheet-like magnetic part 5 with a part of the planar coil 3 exposed, and is on the power receiving side or the power feeding side. It has a shape having a front surface 5a and a back surface 5b that can be a magnetic open surface facing the device.
- the fine met 11 that is the iron-based amorphous particles that are magnetic particles is dispersed in the melted epoxy resin 10, so that the fine met 11 can be easily evenly dispersed in the epoxy resin 10. .
- the thermal conductivity and magnetism of the magnetic part 5 can be easily realized.
- the epoxy resin 10 has a B-stage shape
- the planar coil 3 and the B-stage epoxy resin 10 are superposed and pressed, the planar coil 3 and the B-stage epoxy resin 10 are brought into close contact with each other. Can be joined. That is, when the planar coil 3 having a gap B between adjacent copper wires and the B-stage epoxy resin 10 are superposed and pressed, the B-stage epoxy resin 10 enters the gap B, and the gap B
- the B-stage epoxy resin 10 can be brought into close contact with the wall surface 3a of the planar coil 3 facing the surface to be integrated.
- the epoxy resin 10 that is a thermosetting resin is used as the resin, and the B-stage epoxy resin 10 is cured (C stage) by post-cure (heat treatment) in the curing step.
- the B-stage epoxy resin 10 is cured (C stage) by post-cure (heat treatment) in the curing step.
- the B-stage epoxy resin 10 that has entered the gap B between the copper wires of the planar coil 3 is cured, The joining state of the planar coil 3 and the epoxy resin 10 can be fixed.
- the B-stage epoxy resin 10 bonded to the planar coil 3 is cured, so that the manufactured wireless power transmission magnetic element 1 integrates the planar coil 3 and the epoxy resin 10 including the fine met 11 together. It can be fixed in the state of becoming.
- Example 1 In the first embodiment, the wireless power transmission magnetic elements 1 and 2 described above are used. As shown in FIG. 6, the magnetic element 1 for wireless power transmission on the power feeding side and the magnetic element 2 for wireless power transmission on the power receiving side are arranged to face each other. At this time, the distance between the wireless power transmission magnetic element 1 and the wireless power transmission magnetic element 2 was 3 mm. Further, the axis of the planar coil 3 and the axis of the planar coil 4 are concentric. Thereafter, the wiring connected to one end portion on the outer peripheral side of the planar coil 3 and the wiring connected to the other end portion on the inner peripheral side are connected to the terminal 41 of the network analyzer 40 (manufactured by Agilent Technologies).
- the wiring connected to one end portion on the outer peripheral side of the planar coil 4 and the wiring connected to the other end portion on the inner peripheral side are connected to the terminal 42 of the network analyzer 40 (manufactured by Agilent Technologies).
- the insertion loss (S21) of S parameter and power transmission efficiency were measured at the measurement frequency of 300 kHz, 500 kHz, and 1000 kHz.
- the power transmission efficiency refers to the ratio of the power output from the power receiving side wireless power transmission magnetic element 2 to the power supplied to the power feeding side wireless power transmission magnetic element 1. That is, energy transfer efficiency when power is transmitted from the wireless power transmission magnetic element 1 to the wireless power transmission magnetic element 2.
- the insertion loss “S21” represents a signal that passes through the terminal 42 when a signal is input from the terminal 41, and is displayed in decibels. The larger the numerical value, the higher the power transmission efficiency. That is, the higher the insertion loss “S21”, the higher the power transmission efficiency.
- Comparative Example 1 a wireless power transmission magnetic element for feeding only the planar coil 3 that does not include the magnetic body portion 5 and a wireless power transmission for power reception that includes only the planar coil 4 that does not include the magnetic body portion 6.
- the planar coil 3 on the power feeding side and the planar coil 4 on the power receiving side are arranged so as to face each other. At this time, the distance between the planar coil 3 and the planar coil 4 was 3 mm. Further, the axis of the planar coil 3 and the axis of the planar coil 4 are concentric.
- the wiring connected to one end portion on the outer peripheral side of the planar coil 3 and the wiring connected to the other end portion on the inner peripheral side are connected to the terminal 41 of the network analyzer 40 (manufactured by Agilent Technologies). Further, the wiring connected to one end portion on the outer peripheral side of the planar coil 4 and the wiring connected to the other end portion on the inner peripheral side are connected to the terminal 42 of the network analyzer 40 (manufactured by Agilent Technologies). And the insertion loss (S21) of S parameter and power transmission efficiency were measured at the measurement frequency of 300 kHz, 500 kHz, and 1000 kHz.
- FIG. 7A shows the result of measuring the S-parameter insertion loss (S21) as described above.
- the horizontal axis is the measurement frequency
- the vertical axis is the insertion loss “S21”.
- the result of having measured the power transmission efficiency is shown in FIG.7 (B).
- the horizontal axis is the measurement frequency
- the vertical axis is the power transmission efficiency (%).
- the wireless power transmission magnetic element only for the planar coil 3 that does not include the magnetic body portion 5 and the wireless power transmission for power reception that includes only the planar coil 4 that does not include the magnetic body portion 6.
- a magnetic element 1 for power feeding wireless power transmission provided with a magnetic body portion 5 and a magnetic element for power reception wireless power transmission provided with a magnetic body portion 6 It was found that Example 1 using 2 had higher S-parameter insertion loss (S21) and higher power transmission efficiency.
- the magnetic elements for wireless power transmission 1 and 2 include the magnetic parts 5 and 6 to transmit power from the magnetic element for wireless power transmission 1 to the magnetic element for wireless power transmission 2. It turns out that the efficiency at the time of doing increases.
- Example 3 the temperature of the surface 5a of the magnetic element 1 for wireless power transmission provided with the magnetic part 5 was measured in Example 3.
- the surface temperature of the magnetic element for wireless power transmission using only the planar coil 3 not provided with the magnetic body portion 5 was measured as Comparative Example 2.
- the surface temperature of the magnetic element for wireless power transmission using only the closely wound flat coil 59 not provided with the magnetic body portion was measured as Comparative Example 3.
- the surface temperature of a magnetic element 58 for wireless power transmission in which a closely wound flat coil 59 is provided with a magnetic part 57 was measured as Comparative Example 4.
- Example 3 In Example 3, the magnetic element 1 for wireless power transmission described above is used. As shown in FIG. 8, it arrange
- the infrared thermography camera 54 is connected to a personal computer 55, and the surface temperature of the wireless power transmission magnetic element 1 can be observed by a monitor. Then, power of 2.5 W from the DC power supply 52 is converted into AC 200 kHz by the power supply circuit 51 and transmitted to the magnetic element 1 for wireless power transmission, and the surface temperature of the magnetic element 1 for wireless power transmission 5 minutes after the start of power transmission. was projected on the monitor of the personal computer 55 and observed.
- the surface temperature of the magnetic element 1 for wireless power transmission 5 minutes after the start of power transmission is measured because the surface temperature of the magnetic element 1 for wireless power transmission 5 is stabilized 5 minutes after the start of power transmission. In the measurement of the surface temperature of the wireless power transmission magnetic element 1, as shown in FIG.
- Comparative Example 2 a magnetic element for wireless power transmission using only the planar coil 3 that does not include the magnetic body portion 5 is used. Similar to the third embodiment, the planar coil 3 is disposed on the four support columns 50. Then, the wiring connected to one end on the outer peripheral side of the planar coil 3 and the wiring connected to the other end on the inner peripheral side are connected to the DC power source 52 via the power supply circuit 51. Then, the infrared thermography camera 54 is disposed above so as to face the surface of the planar coil 3. The infrared thermography camera 54 is connected to a personal computer 55 and can observe the surface temperature of the planar coil 3 by a monitor.
- Comparative Example 3 a magnetic element for wireless power transmission using only a closely wound planar coil 59 that does not include a magnetic body portion is used.
- the closely wound flat coil 59 has a coil inner diameter of 5 mm ⁇ obtained by winding a round copper wire (with an insulating coating) having a wire diameter of 500 ⁇ m ⁇ in a spiral shape so that there is no gap between the copper wires.
- the coil is formed as a planar coil having a coil outer diameter of 43 mm ⁇ .
- the planar coil 59 is disposed on the four support columns 50.
- the wiring connected to one end portion on the outer peripheral side of the planar coil 59 and the wiring connected to the other end portion on the inner peripheral side are connected to the DC power source 52 via the power supply circuit 51.
- the infrared thermography camera 54 is disposed above so as to face the surface of the planar coil 3.
- the infrared thermography camera 54 is connected to a personal computer 55, and the surface temperature of the planar coil 59 can be observed by a monitor.
- 2.5 W of electric power from the DC power supply 52 is converted into AC 200 kHz by the power supply circuit 51 and transmitted to the planar coil 59, and the surface temperature of the planar coil 59 5 minutes after the start of power transmission is displayed on the monitor of the personal computer 55. Observed.
- the surface temperature was measured at three locations near the middle T3.
- the magnetic element 58 for wireless power transmission provided with the magnetic body portion 57 in the above-described closely wound flat coil 59 is used.
- the magnetic body portion 57 is formed in a sheet shape having a square shape with a side of 50 mm and a thickness of 600 ⁇ m.
- the magnetic element 58 for wireless power transmission is in close contact so that the entire planar coil 59 is embedded in the magnetic body portion 57. It is joined. That is, unlike the third embodiment, the wireless power transmission magnetic element 58 according to the comparative example 4 has no gap between the copper wires of the planar coil 59.
- the magnetic body portions 57 are not alternately arranged in parallel in a direction orthogonal to the magnetic coupling direction.
- Example 3 it arrange
- the wiring connected to one end portion on the outer peripheral side of the planar coil 59 of the magnetic element 58 for wireless power transmission and the wiring connected to the other end portion on the inner peripheral side are connected to the DC power source 52 through the power supply circuit 51.
- the infrared thermography camera 54 is disposed above so as to face the surface of the wireless power transmission magnetic element 58.
- the infrared thermography camera 54 is connected to a personal computer 55, and the surface temperature of the wireless power transmission magnetic element 58 can be observed by a monitor.
- FIG. 9A shows the surface temperature of the wireless power transmission magnetic element 1 according to the third embodiment.
- FIG. 9B shows the surface temperature of the planar coil 3 according to Comparative Example 2.
- FIG. 10C shows the surface temperature of the planar coil 59 according to Comparative Example 3.
- FIG. 10D shows the surface temperature of the wireless power transmission magnetic element 58 according to Comparative Example 3.
- the surface temperatures near the outer edge T1, near the center T2, and near the middle T3 in the magnetic element 1 for wireless power transmission according to Example 3 are 45.2 ° C. and 52.2 ° C., respectively. 54.7 ° C.
- the surface temperatures near the outer edge T1, the center T2, and the middle T3 in the planar coil 3 according to Comparative Example 2 were 41.6 ° C., 58.8 ° C., and 64.9 ° C., respectively.
- the surface temperatures of the vicinity of the outer edge T1, the vicinity of the center T2, and the vicinity T3 of the planar coil 59 according to Comparative Example 3 were 40.7 ° C., 46.3 ° C., and 65.1 ° C., respectively.
- the surface temperatures of the vicinity T1, the center T2, and the middle T3 of the magnetic element 58 for wireless power transmission according to Comparative Example 4 are 38.9 ° C., 58.5 ° C., and 60.4 ° C., respectively. there were.
- the wireless power transmission magnetic element 1 including the magnetic body portion 5 according to the third embodiment is compared with the wireless power transmission magnetic element including only the planar coil 3 that does not include the magnetic body portion 5 according to the comparative example 2.
- the surface temperature is low at two locations near the center T2 and near the middle T3.
- the measured temperature in Comparative Example 2 is lower in the vicinity of the outer edge T1, but this is because the magnetic element for wireless power transmission according to Comparative Example 2 does not include the magnetic part, and therefore the vicinity of the outer edge T1. It is thought that this is mainly due to the measurement of atmospheric temperature.
- the wireless power transmission magnetic element 1 including the magnetic body portion 5 according to the third embodiment is compared with the wireless power transmission magnetic element including only the planar coil 3 that does not include the magnetic body portion 5 according to the comparative example 2. It can be seen that the heat dissipation is high.
- the wireless power transmission magnetic element 58 including the magnetic body portion 57 according to the comparative example 4 is compared with the wireless power transmission magnetic element including only the planar coil 59 that does not include the magnetic body portion 57 according to the comparative example 3. It can be seen that the surface temperature is low at two locations, near the outer edge T1 and near the middle T3. The measured temperature in Comparative Example 4 is lower in the vicinity of the center portion T2, but this is because the magnetic element for wireless power transmission according to Comparative Example 3 does not include the magnetic body portion. It is thought that this is mainly due to the measurement of atmospheric temperature.
- the wireless power transmission magnetic element 58 including the magnetic body portion 57 according to the comparative example 4 is compared with the wireless power transmission magnetic element including only the planar coil 59 that does not include the magnetic body portion 57 according to the comparative example 3. It can be seen that the heat dissipation is high. That is, the heat dissipation can be enhanced by providing the magnetic body portion 57 even in the closely wound planar coil 59 having no gap between the copper wires.
- the surface temperature of the planar coil 3 according to the comparative example 2 and the surface temperature of the closely wound planar coil 59 according to the comparative example 3 are substantially the same.
- the wireless power transmission magnetic element 1 using the planar coil 3 having a gap between the copper wires according to the third embodiment uses the planar power 59 using the planar coil 59 having no gap between the copper wires according to the comparative example 4.
- the surface temperature is lower at two locations near the center T2 and near the middle T3 than the magnetic element 58 for use.
- the measured temperature of Comparative Example 4 is lower near the outer edge T1, but this is because the magnetic element 58 for wireless power transmission according to Comparative Example 4 uses a planar coil 59 with no gap between copper wires.
- the magnetic element 1 for wireless power transmission using the planar coil 3 having a gap between the copper wires according to the third embodiment is the wireless power transmission using the planar coil 59 having no gap between the copper wires according to the comparative example 4. It can be seen that the heat dissipation is higher than the magnetic element 58 for use. That is, in a magnetic element for wireless power transmission provided with a magnetic body, heat dissipation can be improved by providing a gap between the copper wires of the planar coil.
- the magnetic element 1 for wireless power transmission has a flat plate shape in which a part of the planar coil 3 is exposed on the front surface 5a of the sheet-like magnetic body portion 5, and the back surface 5b is flat.
- a metal heat sink 101 may be provided on the back surface 5b of the magnetic element 1 for wireless power transmission.
- the heat sink 101 has a flat contact surface with the back surface 5b of the wireless power transmission magnetic element 1, but a plurality of concave grooves 115 are formed on the side 101a opposite to the contact surface.
- FIG. 11A is a perspective view showing the surface 5 a of the magnetic element for wireless power transmission provided with the heat sink 101.
- FIG. 11B is a perspective view showing the groove 115 of the heat sink 101 of the magnetic element 1 for wireless power transmission provided with the heat sink 101.
- the heat sink 101 has a plurality of concave grooves 115, so that heat dissipation is improved by increasing the surface area.
- heat is transferred from the back surface 5b of the wireless power transmission magnetic element 1 to the heat sink 101, and the efficiency is achieved through the plurality of concave grooves 115. It can dissipate heat well.
- FIGS. 12A and 12B a plurality of concave grooves 215 may be formed on the back surface 205b of the magnetic body portion 205 of the wireless power transmission magnetic element 201.
- FIG. 12A is a perspective view showing the surface 205a of the magnetic element 201 for wireless power transmission.
- FIG. 12B is a perspective view showing the back surface 205b of the magnetic element 201 for wireless power transmission.
- a plurality of convex shapes are formed on the surface in contact with the back surface of the epoxy resin that has become a B stage shape (the portion that will later become the back surface 205 b of the magnetic body portion 205) in the pressing step.
- a mold provided with a groove forming portion is applied. And it can form by pressing from above and below the plate which piled up the metal mold, the epoxy resin which became B-stage shape, and the plane coil in order from the bottom.
- a plurality of concave grooves 215 can be formed on the back surface 205b of the magnetic body 205 of the magnetic element 201 for wireless power transmission.
- the surface area of the magnetic body portion 205 can be increased, so that heat dissipation can be improved.
- the shape of the groove is not limited to the concave groove shown in FIG. 12, but a plurality of concave vertical grooves 315 are formed on the back surface 305b of the magnetic body portion 305 of the wireless power transmission magnetic element 301 as shown in FIG.
- a plurality of protrusions 320 may be formed by providing a plurality of concave lateral grooves 317.
- the magnetic part 5 is not limited to a thermosetting resin, and a thermoplastic resin can also be used.
- the thermoplastic resin can be repeatedly softened when heat is applied and solidified when cooled. Specifically, it can be softened by heating up to the melting point and molded into a desired shape, and a thermoplastic resin can be filled between the copper wires of the planar coil 3.
- the thermoplastic resin include PP (polypropylene), ABS (acrylonitrile-butadiene-styrene copolymer), PET (polyethylene terephthalate), PE (polyethylene), and PC (polycarbonate).
- thermoplastic resin softened by the heat treatment can be fixed in a space B between the copper wires of the planar coil 3 and cooled and solidified.
- thermoplastic resin softened by the heat treatment is simply sealed in the gap B between the copper wires of the planar coil 3 and cooled and solidified, so that the planar coil 3 and the thermoplastic resin as the magnetic body portion are The joining state can be fixed.
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Abstract
Description
また、樹脂を加熱してBステージ状態にしているため、導体部とBステージ状樹脂とを重ね合わせて加圧した場合に、導体部とBステージ状樹脂とを密着させて接合することができる。即ち、導体部とBステージ状樹脂とを接合することにより一体化することができる。そして、導体部に接合されたBステージ状樹脂が硬化されることによって、製造された無線電力伝送用磁気素子は、導体部と磁性粒子を含む樹脂とを一体化した状態で固定することができる。
図1に示すように、無線電力伝送用磁気素子1・2は、磁気結合により誘導起電力を引き起こすように構成されており、給電用及び受電用の何れにも用いることができる。給電用としては、例えば、無線電力伝送用磁気素子1は、電磁誘導を利用したコードレスの給電により作動するパーソナルコンピュータやマウス等の載置型の機器の給電に用いられる電力供給装置等に適用可能である。また、無線電力伝送用磁気素子1は、磁界共鳴を利用したコードレスの給電により作動する壁掛け用薄型テレビ等の壁掛け型の機器や電気自動車の給電に用いられる電力供給装置等にも適用可能である。
上記の給電用の無線電力伝送用磁気素子1は、図1に示すように、交流電流が流通する平面コイル3(導体部)と、図1及び図2のA-A´断面図に示すように、磁気結合方向に一致する断面において、平面コイル3と、平面コイル3に隣接された磁性体部5とが、磁気結合方向に対して直交方向に並列配置されている。そして、磁性体部5は、磁性粒子が分散された樹脂で構成され、該樹脂により少なくとも一部が平面コイル3に対して電気的に絶縁状態で接合されて一体化している。なお、受電用の無線電力伝送用磁気素子2も同様の構成をしているため以後説明を省略する。なお、『直交方向』とは、ほぼ直交するという程度である。
平面コイル3は、線径500μmφの丸形タイプの銅線材(絶縁被膜付)を銅線間に500μmの隙間Bができるように渦巻き状に19周巻回したコイル内径5mmφ、コイル外径43mmφの平面コイルとして形成されている。また、平面コイル3は、Cu、Al等の金属材料であればよい。また、上記した平面コイル3の構成は例示であり、銅線材の形状やサイズ、隙間のサイズ、巻回数等は適宜変更可能である。
磁性体部5は、一辺が50mmの正方形状をした、厚さ600μmのシート状に形成され、図2に示すように、平面コイル3に設けられた500μmの隙間Bを埋めるように平面コイル3の壁面3aに密着して接合している。これにより、磁気結合方向に一致した縦断面(A-A'断面図)において、平面コイル3と磁性体部5とが、磁気結合方向に対して直交方向に交互に並列配置された構成にされている。また、平面コイル3の壁面3aにおいて、磁性体部5が平面コイル3に対して電気的に絶縁状態で接合されて一体化されることになる。尚、上記した磁性体部5の構成は例示であり、形状やサイズ、隙間のサイズ等は適宜変更可能である。
磁性体部5は、磁性粒子が分散された樹脂で構成されている。本実施例では、樹脂には熱硬化性樹脂であるエポキシ樹脂10を使用しているが、硬化した後に高温放置試験や高温高湿放置試験などで劣化しないものであれば特に限定されることなく、好適に使用する
ことができる。例えば、エポキシ樹脂としてはグリシジルアミン型エポキシ樹脂、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂、ビフェニル型エポキシ樹脂、ナフタレン型エポキシ樹脂、脂肪族エポキシ樹脂、ハロゲン化エポキシ樹脂などがあげられ、単独もしくは2種類以上併せて用いられる。
また、磁性体部5は、上記樹脂中に磁性粒子が分散されている。磁性粒子には、軟磁性粒子を使用するが、軟磁性粒子の中でも金属系磁性粒子が好ましい。更には、金属系磁性粒子の中でもアモルファス粒子が好ましい。なお、本実施形態では、磁性粒子には、鉄系アモルファス粒子として球状のファインメット(日立金属社製)を使用している。このファインメットが属する鉄系アモルファス粒子は結晶構造を持たず高い透磁率を呈することから、磁性体部5を薄くして充分に高い磁気遮蔽率で保持することができる。
上記の構成において、無線電力伝送用磁気素子1に対して電源装置が接続され、高周波の交流電流(交流電力)が供給されると、無線電力伝送用磁気素子1が交番磁場を生成する。この際、図3に示すように、無線電力伝送用磁気素子1は、磁気結合方向に一致する断面において、平面コイル3と磁性体部5とが、磁気結合方向に対して直交方向に交互に並列配置された構成をしていることによって、図4に示すように、無線電力伝送用磁気素子1は、平面コイル3の隙間に磁性体部5が並列配置されていない場合と比較して、平面コイル3周辺における磁気結合にとって無効な磁界を減少させると共に、全体的な磁界の広がりを抑制することが可能になる。この結果、無線電力伝送用磁気素子1は、受電側の無線電力伝送用磁気素子2に向かう磁束密度を高めることが可能になる。これにより、無線電力伝送用磁気素子1は、無線電力伝送用磁気素子2に対して高い送電効率で電力を給電することができる。
次に、無線電力伝送用磁気素子1の製造方法について説明する。なお、無線電力伝送用磁気素子2の製造方法も同様である。
以上、無線電力伝送用磁気素子1の構成、及び、その製造方法について説明した。次に、無線電力伝送用磁気素子1のSパラメータの挿入損失(S21)及び送電効率の比較実験、及び、放熱性の比較実験について説明する。
まず、上記磁性体部5を備えた無線電力伝送用磁気素子1・2のSパラメータの挿入損失(S21)及び送電効率を実施例1で測定すると共に、磁性体部5を備えていない平面コイル3だけの無線電力伝送用磁気素子のSパラメータの挿入損失(S21)及び送電効率を比較例1で測定した。
実施例1では、上記で説明した無線電力伝送用磁気素子1・2を使用する。図6に示すように、給電側の無線電力伝送用磁気素子1と受電側の無線電力伝送用磁気素子2とが向い合うように配置する。この際、無線電力伝送用磁気素子1と無線電力伝送用磁気素子2とが対向する間隔は、3mmの距離とした。また、平面コイル3の軸芯と平面コイル4の軸芯とが同芯となるようにしている。この後、平面コイル3の外周側の一端部に接続された配線と内周側の他端部に接続された配線とをネットワークアナライザ40(アジレント・テクノロジー株式会社製)の端子41に接続する。また、平面コイル4の外周側の一端部に接続された配線と内周側の他端部に接続された配線とをネットワークアナライザ40(アジレント・テクノロジー株式会社製)の端子42に接続する。そして、300kHz、500kHz、及び1000kHzの測定周波数でSパラメータの挿入損失(S21)及び送電効率を測定した。
次に、比較例1では、磁性体部5を備えていない平面コイル3だけの給電用の無線電力伝送用磁気素子と磁性体部6を備えていない平面コイル4だけの受電用の無線電力伝送用磁気素子を使用する。給電側の平面コイル3と受電側の平面コイル4とが向い合うように配置する。この際、平面コイル3と平面コイル4とが対向する間隔は、3mmの距離とした。また、平面コイル3の軸芯と平面コイル4の軸芯とが同芯となるようにしている。この後、平面コイル3の外周側の一端部に接続された配線と内周側の他端部に接続された配線とをネットワークアナライザ40(アジレント・テクノロジー株式会社製)の端子41に接続する。また、平面コイル4の外周側の一端部に接続された配線と内周側の他端部に接続された配線とをネットワークアナライザ40(アジレント・テクノロジー株式会社製)の端子42に接続する。そして、300kHz、500kHz、及び1000kHzの測定周波数でSパラメータの挿入損失(S21)及び送電効率を測定した。
上記のようにしてSパラメータの挿入損失(S21)を測定した結果を図7(A)に示す。図7(A)では、横軸を測定周波数とし、縦軸を挿入損失『S21』としている。また、送電効率を測定した結果を図7(B)に示す。図7(B)では、横軸を測定周波数とし、縦軸を送電効率(%)としている。
次に、上記磁性体部5を備えた無線電力伝送用磁気素子1の表面5aの温度を実施例3で測定した。また、磁性体部5を備えていない平面コイル3だけの無線電力伝送用磁気素子の表面温度を比較例2として測定した。また、磁性体部を備えていない密巻きにした平面コイル59だけの無線電力伝送用磁気素子の表面温度を比較例3として測定した。更に、密巻きにした平面コイル59に磁性体部57を備えた無線電力伝送用磁気素子58の表面温度を比較例4として測定した。
実施例3では、上記で説明した無線電力伝送用磁気素子1を使用する。図8に示すように、4つの支柱50の上に無線電力伝送用磁気素子1の裏面5bが下になるように配置する。そして、無線電力伝送用磁気素子1の平面コイル3の外周側の一端部に接続された配線と内周側の他端部に接続された配線とを電源回路51を介して直流電源52に接続する。そして、赤外線サーモグラフィーカメラ54を無線電力伝送用磁気素子1の表面5aと対向するように上方に配置する。赤外線サーモグラフィーカメラ54は、パーソナルコンピュータ55に接続されており、モニターにより無線電力伝送用磁気素子1の表面温度を観測することができる。そして、直流電源52からの2.5Wの電力を電源回路51で交流200kHzに変換して無線電力伝送用磁気素子1に送電し、送電開始5分後の無線電力伝送用磁気素子1の表面温度をパーソナルコンピュータ55のモニターに映して観測した。ここで、送電開始5分後の無線電力伝送用磁気素子1の表面温度を測定しているのは、送電開始5分後に無線電力伝送用磁気素子1の表面温度が安定したためである。なお、無線電力伝送用磁気素子1の表面温度測定では、図9(A)に示すように、無線電力伝送用磁気素子1の外縁部付近T1、無線電力伝送用磁気素子1の中心部付近T2、及び、無線電力伝送用磁気素子1の外縁部から中心部の中間付近T3の3箇所で表面温度を計測した。
比較例2では、磁性体部5を備えていない平面コイル3だけの無線電力伝送用磁気素子を使用する。実施例3同様に、4つの支柱50の上に平面コイル3を配置する。そして、平面コイル3の外周側の一端部に接続された配線と内周側の他端部に接続された配線とを電源回路51を介して直流電源52に接続する。そして、赤外線サーモグラフィーカメラ54を平面コイル3の表面と対向するように上方に配置する。赤外線サーモグラフィーカメラ54は、パーソナルコンピュータ55に接続されており、モニターにより平面コイル3の表面温度を観測することができる。そして、直流電源52からの2.5Wの電力を電源回路51で交流200kHzに変換して平面コイル3に送電し、送電開始5分後の平面コイル3の表面温度をパーソナルコンピュータ55のモニターに映して観測した。なお、平面コイル3の表面温度測定では、図9(B)に示すように、平面コイル3の外縁部付近T1、平面コイル3の中心部付近T2、及び、平面コイル3の外縁部と中心部との中間付近T3の3箇所で表面温度を計測した。
比較例3では、磁性体部を備えていない密巻きにした平面コイル59だけの無線電力伝送用磁気素子を使用する。具体的には、密巻にした平面コイル59は、線径500μmφの丸形タイプの銅線材(絶縁被膜付)を銅線間に隙間ができないように渦巻き状に36周巻回したコイル内径5mmφ、コイル外径43mmφの平面コイルとして形成されている。そして、実施例3同様に、4つの支柱50の上に平面コイル59を配置する。そして、平面コイル59の外周側の一端部に接続された配線と内周側の他端部に接続された配線とを電源回路51を介して直流電源52に接続する。そして、赤外線サーモグラフィーカメラ54を平面コイル3の表面と対向するように上方に配置する。赤外線サーモグラフィーカメラ54は、パーソナルコンピュータ55に接続されており、モニターにより平面コイル59の表面温度を観測することができる。そして、直流電源52からの2.5Wの電力を電源回路51で交流200kHzに変換して平面コイル59に送電し、送電開始5分後の平面コイル59の表面温度をパーソナルコンピュータ55のモニターに映して観測した。なお、平面コイル59の表面温度測定では、図10(C)に示すように、平面コイル59の外縁部付近T1、平面コイル59の中心部付近T2、及び、平面コイル59の外縁部と中心部との中間付近T3の3箇所で表面温度を計測した。
比較例4では、上記密巻きにした平面コイル59に磁性体部57を備えた無線電力伝送用磁気素子58を使用する。磁性体部57は、一辺が50mmの正方形状をした、厚さ600μmのシート状に形成され、無線電力伝送用磁気素子58は、平面コイル59全体が磁性体部57に埋まるように密着して接合されている。即ち、比較例4に係る無線電力伝送用磁気素子58は、実施例3とは異なり、平面コイル59の銅線間に隙間がないため、磁気結合方向に一致した縦断面において、平面コイル59と磁性体部57とが、磁気結合方向に対して直交方向に交互に並列配置されていない構成になる。
上記のようにして測定した結果を図9及び図10に示す。図9(A)は、実施例3に係る無線電力伝送用磁気素子1の表面温度を表示したものである。図9(B)は、比較例2に係る平面コイル3の表面温度を表示したものである。図10(C)は、比較例3に係る平面コイル59の表面温度を表示したものである。図10(D)は、比較例3に係る無線電力伝送用磁気素子58の表面温度を表示したものである。
上記実施例に係る無線電力伝送用磁気素子1は、シート状の磁性体部5の表面5aに平面コイル3の一部が露出した平板形状をしており、裏面5bは平面であるが、図11(A)(B)に示すように、この無線電力伝送用磁気素子1の裏面5bに金属製のヒートシンク101を設けた構成としてもよい。このヒートシンク101は、無線電力伝送用磁気素子1の裏面5bとの接触面は平面であるが、接触面とは反対側101aには複数の凹状の溝115が形成されている。なお、図11(A)は、ヒートシンク101を備えた無線電力伝送用磁気素子の表面5aを示す斜視図である。図11(B)は、ヒートシンク101を備えた無線電力伝送用磁気素子1のヒートシンク101の溝115を示す斜視図である。
3・4 平面コイル
3a・4a 壁面
5・6 磁性体部
B 隙間
Claims (12)
- 誘導起電力を引き起こす無線電力伝送用磁気素子であって、
交流電流が流通する導体部と、
前記導体部に並列配置された磁性体部とを有し、
前記磁性体部は、磁性粒子が分散された樹脂を有し、該樹脂により少なくとも一部が前記導体部に対して電気的に絶縁状態で接合されて一体化していることを特徴とする無線電力伝送用磁気素子。 - 前記樹脂は、熱硬化性樹脂であることを特徴とする請求項1に記載の無線電力伝送用磁気素子。
- 前記樹脂は、熱可塑性樹脂であることを特徴とする請求項1に記載の無線電力伝送用磁気素子。
- 前記磁性粒子は、軟磁性粒子であることを特徴とする請求項1~3のいずれか1項に記載の無線電力伝送用磁気素子。
- 前記軟磁性粒子は、金属系磁性粒子であることを特徴とする請求項4に記載の無線電力伝送用磁気素子。
- 前記金属系磁性粒子は、アモルファス粒子であることを特徴とする請求項5に記載の無線電力伝送用磁気素子。
- 前記磁性体部には、複数の溝が形成されていることを特徴とする請求項1~3のいずれか1項に記載の無線電力伝送用磁気素子。
- 請求項1に記載の無線電力伝送用磁気素子の製造方法であって、
樹脂に磁性粒子を分散させる磁性粒子分散工程と、
前記磁性粒子を分散させた樹脂を加熱してBステージ化させることによりBステージ状樹脂にするBステージ化工程と、
前記導体部と前記Bステージ状樹脂とを重ね合わせて加圧することにより接合する加圧工程と、
前記導体部に接合された前記Bステージ状樹脂を硬化させる硬化工程と、
を含むことを特徴とする無線電力伝送用磁気素子の製造方法。 - 前記加圧工程において、
前記Bステージ状樹脂に複数の溝を形成することを特徴とする請求項8に記載の無線電力伝送用磁気素子の製造方法。 - 前記加圧工程において、
隣接する導体部間に隙間が存在する導体部成形体と前記Bステージ状樹脂とを重ね合わせて加圧することにより接合することを特徴とする請求項8に記載の無線電力伝送用磁気素子の製造方法。 - 前記樹脂は熱硬化性樹脂であって、
前記硬化工程では、加熱処理によってBステージ状の前記熱硬化性樹脂を硬化させることを特徴とする請求項8~10のいずれか1項に記載の無線電力伝送用磁気素子の製造方法。 - 前記樹脂は、熱可塑性樹脂であって、
前記硬化工程では、加熱処理によって軟化させた前記熱可塑性樹脂を前記導体部間に封入し冷却固化させることで固定化することを特徴とする請求項8~10のいずれか1項に記載の無線電力伝送用磁気素子の製造方法。
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EP12761335.4A EP2690636A4 (en) | 2011-03-24 | 2012-03-06 | MAGNETIC ELEMENT FOR WIRELESS POWER TRANSMISSION AND MANUFACTURING METHOD THEREFOR |
CN201280015320.3A CN103443884B (zh) | 2011-03-24 | 2012-03-06 | 无线电力传输用磁元件及其制造方法 |
US14/005,502 US9251950B2 (en) | 2011-03-24 | 2012-03-06 | Magnetic element for wireless power transmission and method for manufacturing same |
KR1020137026824A KR20140010977A (ko) | 2011-03-24 | 2012-03-06 | 무선 전력 전송용 자기 소자 및 그의 제조 방법 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014096043A2 (de) * | 2012-12-21 | 2014-06-26 | Robert Bosch Gmbh | Induktivladespulenvorrichtung |
JP2015012273A (ja) * | 2013-07-02 | 2015-01-19 | Tdk株式会社 | 圧粉磁心および電子部品 |
US9236177B2 (en) * | 2013-10-16 | 2016-01-12 | Samsung Electro-Mechanics Co., Ltd. | Common mode filter |
EP2775484A3 (en) * | 2013-03-06 | 2017-11-22 | Kabushiki Kaisha Toshiba | Coil, power receiving apparatus and power transmitting apparatus |
WO2024053620A1 (ja) * | 2022-09-05 | 2024-03-14 | 大日本印刷株式会社 | コイル部品及びその製造方法、送電装置、受電装置、電力伝送システム、並びに移動体 |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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GB201403548D0 (en) * | 2014-02-28 | 2014-04-16 | Bombardier Transp Gmbh | Inductive power transfer pad comprising a stationary part and a moveable part |
KR101762778B1 (ko) | 2014-03-04 | 2017-07-28 | 엘지이노텍 주식회사 | 무선 충전 및 통신 기판 그리고 무선 충전 및 통신 장치 |
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KR101950369B1 (ko) | 2015-06-25 | 2019-02-20 | 엘지이노텍 주식회사 | 무선 전력 수신 장치 및 이를 포함하는 무선 전력 전송 시스템 |
KR101559939B1 (ko) | 2015-07-07 | 2015-10-14 | 주식회사 아모그린텍 | 무선충전용 방열유닛 |
TWI578872B (zh) * | 2015-07-22 | 2017-04-11 | 乾坤科技股份有限公司 | 印刷電路板之多層導線結構、磁性元件及其製造方法 |
US10289263B2 (en) * | 2016-01-08 | 2019-05-14 | The Boeing Company | Data acquisition and encoding process linking physical objects with virtual data for manufacturing, inspection, maintenance and repair |
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JP6631382B2 (ja) * | 2016-04-20 | 2020-01-15 | Tdk株式会社 | コイル部品 |
US10525690B2 (en) * | 2016-09-07 | 2020-01-07 | General Electric Company | Additive manufacturing-based low-profile inductor |
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WO2018235898A1 (ja) | 2017-06-22 | 2018-12-27 | 株式会社Ihi | コイル装置 |
CN110998764B (zh) | 2017-08-22 | 2022-05-03 | 三星电子株式会社 | 无线电力收发器和具有其的显示装置 |
JP6993161B2 (ja) * | 2017-10-10 | 2022-01-13 | 株式会社タムラ製作所 | コアの製造方法 |
CN111447993A (zh) | 2017-11-16 | 2020-07-24 | 3M创新有限公司 | 包含官能化颗粒的聚合物基质复合材料及其制备方法 |
US11732104B2 (en) | 2017-11-16 | 2023-08-22 | 3M Innovative Properties Company | Polymer matrix composites comprising dielectric particles and methods of making the same |
US10836873B2 (en) | 2017-11-16 | 2020-11-17 | 3M Innovative Properties Company | Polymer matrix composites comprising thermally insulating particles and methods of making the same |
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JP7317007B2 (ja) | 2017-11-16 | 2023-07-28 | スリーエム イノベイティブ プロパティズ カンパニー | ポリマーマトリックス複合体の製造方法 |
US10913834B2 (en) | 2017-11-16 | 2021-02-09 | 3M Innovative Properties Company | Polymer matrix composites comprising indicator particles and methods of making the same |
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US11165273B2 (en) | 2018-05-25 | 2021-11-02 | Apple Inc. | Wireless charging systems for electronic devices |
KR102617535B1 (ko) | 2018-07-25 | 2023-12-27 | 아지노모토 가부시키가이샤 | 자성 페이스트 |
KR102235490B1 (ko) * | 2018-08-20 | 2021-04-02 | 애플 인크. | 전자 디바이스를 위한 무선 충전 시스템 |
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KR20210096451A (ko) * | 2020-01-28 | 2021-08-05 | 에스케이씨 주식회사 | 무선충전 패드, 무선충전 장치, 및 이를 포함하는 전기 자동차 |
CN114496448A (zh) * | 2020-10-26 | 2022-05-13 | 北京梦之墨科技有限公司 | 一种柔性可拉伸射频线圈 |
CN113891544B (zh) * | 2021-08-26 | 2024-04-12 | 华为技术有限公司 | 磁性功率器件和应用其的电源模块 |
DE102022108790A1 (de) | 2022-04-11 | 2023-10-12 | Magnetec Gmbh | Elektromagnetische Wellen dämpfende Dispersion, Halbzeug, Herstellverfahren und Verwendung |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6034009A (ja) * | 1983-08-05 | 1985-02-21 | Tohoku Metal Ind Ltd | フェライトビードインダクター素子 |
JP2004047700A (ja) | 2002-07-11 | 2004-02-12 | Jfe Steel Kk | 非接触充電器用平面磁気素子 |
JP2005135948A (ja) * | 2003-10-28 | 2005-05-26 | Tdk Corp | チップ型電子部品及びその製造方法 |
JP2006019418A (ja) * | 2004-06-30 | 2006-01-19 | Mitsumi Electric Co Ltd | コイル装置 |
JP2008205264A (ja) | 2007-02-21 | 2008-09-04 | Kyocera Corp | コイル内蔵基板 |
JP2010239848A (ja) | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 電力伝送装置 |
JP2010245473A (ja) * | 2009-04-10 | 2010-10-28 | Toko Inc | 表面実装インダクタの製造方法とその表面実装インダクタ |
WO2011001812A1 (ja) * | 2009-06-30 | 2011-01-06 | 株式会社村田製作所 | コイル、コイルの製造方法、及びコイルモジュール |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04129206A (ja) * | 1990-09-19 | 1992-04-30 | Toshiba Corp | 薄形変圧器 |
JP2002299138A (ja) * | 2001-04-02 | 2002-10-11 | Kawasaki Steel Corp | 非接触充電器用平面磁気素子 |
JP2005109173A (ja) * | 2003-09-30 | 2005-04-21 | Jfe Steel Kk | 非接触充電器用平面磁気素子 |
JP2005116819A (ja) * | 2003-10-08 | 2005-04-28 | Daido Steel Co Ltd | 難燃性複合磁性シート |
EP1801739A4 (en) | 2004-10-13 | 2009-07-15 | Toppan Forms Co Ltd | CONTACTLESS INTEGRATED CIRCUIT LABEL AND METHOD AND APPARATUS FOR MANUFACTURING THE SAME |
JP5118394B2 (ja) | 2007-06-20 | 2013-01-16 | パナソニック株式会社 | 非接触電力伝送機器 |
JP2009094428A (ja) * | 2007-10-12 | 2009-04-30 | Toko Inc | 高透磁率磁性体モールド成形材料 |
KR101604600B1 (ko) * | 2008-04-03 | 2016-03-18 | 코닌클리케 필립스 엔.브이. | 무선 파워 송신 시스템 |
TWI364895B (en) * | 2008-06-09 | 2012-05-21 | Univ Nat Taipei Technology | Wireless power transmitting apparatus |
TW201011789A (en) | 2008-09-04 | 2010-03-16 | Delta Electronics Inc | Magnetic component and manufacturing method thereof |
JP2010186856A (ja) * | 2009-02-12 | 2010-08-26 | Sony Chemical & Information Device Corp | 熱伝導性シート |
JP2010245323A (ja) | 2009-04-07 | 2010-10-28 | Seiko Epson Corp | コイルユニット及び電子機器 |
JP5707676B2 (ja) * | 2009-05-20 | 2015-04-30 | 大同特殊鋼株式会社 | 扁平状軟磁性粉末および磁性体 |
US8692639B2 (en) * | 2009-08-25 | 2014-04-08 | Access Business Group International Llc | Flux concentrator and method of making a magnetic flux concentrator |
JP5364745B2 (ja) | 2010-03-09 | 2013-12-11 | 日東電工株式会社 | 無線電力伝送用磁気素子及び電力供給装置 |
-
2011
- 2011-03-24 JP JP2011065420A patent/JP2012204440A/ja active Pending
-
2012
- 2012-03-06 US US14/005,502 patent/US9251950B2/en not_active Expired - Fee Related
- 2012-03-06 EP EP12761335.4A patent/EP2690636A4/en not_active Withdrawn
- 2012-03-06 CN CN201280015320.3A patent/CN103443884B/zh not_active Expired - Fee Related
- 2012-03-06 KR KR1020137026824A patent/KR20140010977A/ko not_active Application Discontinuation
- 2012-03-06 WO PCT/JP2012/055680 patent/WO2012128027A1/ja active Application Filing
- 2012-03-12 TW TW101108291A patent/TW201250734A/zh unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6034009A (ja) * | 1983-08-05 | 1985-02-21 | Tohoku Metal Ind Ltd | フェライトビードインダクター素子 |
JP2004047700A (ja) | 2002-07-11 | 2004-02-12 | Jfe Steel Kk | 非接触充電器用平面磁気素子 |
JP2005135948A (ja) * | 2003-10-28 | 2005-05-26 | Tdk Corp | チップ型電子部品及びその製造方法 |
JP2006019418A (ja) * | 2004-06-30 | 2006-01-19 | Mitsumi Electric Co Ltd | コイル装置 |
JP2008205264A (ja) | 2007-02-21 | 2008-09-04 | Kyocera Corp | コイル内蔵基板 |
JP2010239848A (ja) | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 電力伝送装置 |
JP2010245473A (ja) * | 2009-04-10 | 2010-10-28 | Toko Inc | 表面実装インダクタの製造方法とその表面実装インダクタ |
WO2011001812A1 (ja) * | 2009-06-30 | 2011-01-06 | 株式会社村田製作所 | コイル、コイルの製造方法、及びコイルモジュール |
Non-Patent Citations (1)
Title |
---|
See also references of EP2690636A4 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014096043A2 (de) * | 2012-12-21 | 2014-06-26 | Robert Bosch Gmbh | Induktivladespulenvorrichtung |
WO2014096043A3 (de) * | 2012-12-21 | 2014-08-21 | Robert Bosch Gmbh | Induktivladespulenvorrichtung |
EP2775484A3 (en) * | 2013-03-06 | 2017-11-22 | Kabushiki Kaisha Toshiba | Coil, power receiving apparatus and power transmitting apparatus |
US10256038B2 (en) | 2013-03-06 | 2019-04-09 | Kabushiki Kaisha Toshiba | Coil, power receiving apparatus, and power transmitting apparatus |
JP2015012273A (ja) * | 2013-07-02 | 2015-01-19 | Tdk株式会社 | 圧粉磁心および電子部品 |
US9236177B2 (en) * | 2013-10-16 | 2016-01-12 | Samsung Electro-Mechanics Co., Ltd. | Common mode filter |
WO2024053620A1 (ja) * | 2022-09-05 | 2024-03-14 | 大日本印刷株式会社 | コイル部品及びその製造方法、送電装置、受電装置、電力伝送システム、並びに移動体 |
Also Published As
Publication number | Publication date |
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US9251950B2 (en) | 2016-02-02 |
TW201250734A (en) | 2012-12-16 |
KR20140010977A (ko) | 2014-01-27 |
US20140002228A1 (en) | 2014-01-02 |
CN103443884A (zh) | 2013-12-11 |
EP2690636A1 (en) | 2014-01-29 |
CN103443884B (zh) | 2016-03-30 |
EP2690636A4 (en) | 2014-03-05 |
JP2012204440A (ja) | 2012-10-22 |
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