WO2015064694A1 - 軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体及び非接触給電システム用電力伝送デバイス - Google Patents
軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体及び非接触給電システム用電力伝送デバイス Download PDFInfo
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- WO2015064694A1 WO2015064694A1 PCT/JP2014/078905 JP2014078905W WO2015064694A1 WO 2015064694 A1 WO2015064694 A1 WO 2015064694A1 JP 2014078905 W JP2014078905 W JP 2014078905W WO 2015064694 A1 WO2015064694 A1 WO 2015064694A1
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- soft magnetic
- resin composition
- magnetic ferrite
- molded body
- ferrite resin
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Classifications
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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
- H01F1/34—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 non-metallic substances, e.g. ferrites
- H01F1/36—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 non-metallic substances, e.g. ferrites in the form of particles
- H01F1/37—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 non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- 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
- H01F27/24—Magnetic cores
- H01F27/255—Magnetic cores made from particles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a power transmission device used in a non-contact power feeding system such as a mobile phone.
- a system for charging in a contactless manner without using a cable has been proposed in order to improve user convenience during charging and to prevent electric shock due to water wetting.
- a power transmission device in which a coil is attached to or close to a magnetic material is used, and electric power is generated by electromagnetic induction action of an alternating magnetic field between a power feeding coil and a power receiving coil that are arranged opposite to each other.
- the mobile device is charged by transmitting.
- Patent Documents 1 and 2 In this system, further higher power transmission efficiency, downsizing, and higher rigidity are required, and technologies for controlling the magnetic permeability and electrical resistivity of magnetic materials (Patent Documents 1 and 2), after high-pressure pressing. A technique for performing heat treatment (Patent Document 3) is disclosed.
- Patent Document 1 discloses a small non-contact transmission device using a ferrite core having a high electric resistance, saturation magnetic flux density, and high magnetic permeability as a magnetic material. May cause damage.
- Patent Document 2 proposes a system using a mixture of ferrite or permalloy and a resin. The performance of this system depends on the properties of the mixed ferrite or permalloy, and the literature does not mention electromagnetic characteristics such as efficiency.
- Patent Document 3 proposes a magnetic shielding sheet obtained by high-pressure pressing Mn—Zn ferrite, iron-based magnetic powder, nickel-based magnetic powder, and resin, and discloses that it has high rigidity and magnetic shielding performance. However, since the metal-based magnetic powder is included, the electric resistance is low, and the efficiency is reduced due to eddy current loss.
- the present invention is a molded product of a soft magnetic ferrite resin composition containing a filler material and a binder material, wherein the filler material is a soft magnetic ferrite powder having an average particle size of 5 to 35 ⁇ m, and the binder material is a thermal material. It is at least one selected from a plastic resin or a soft polyolefin resin, the molding density of the molded product of the soft magnetic ferrite resin composition is 3.2 to 4.7 g / cm 3 , and the magnetic permeability is 5 to 15. Is a soft magnetic ferrite resin composition molded body (Invention 1).
- the present invention also relates to a soft magnetic ferrite resin composition molded body according to the present invention 1, wherein the inductance is 3.5 to 6 ⁇ H (the present invention) 2).
- the present invention also relates to a soft magnetic ferrite resin composition molded article according to any one of the present inventions 1 and 2, wherein the power transmission efficiency is 55 to 80%. It is a molded body (Invention 3).
- the present invention also relates to a molded soft magnetic ferrite resin composition according to any one of the present inventions 1 to 3, wherein the filling material is spinel ferrite. (Invention 4).
- the present invention is also the soft magnetic ferrite resin composition molded body according to any one of the present inventions 1 to 4, wherein the soft magnetic ferrite powder has a compression density of 2.5 to 5 g / cm 3 and a specific surface area of 0.
- the present invention also provides the soft magnetic ferrite resin composition molded body according to any one of the present inventions 1 to 5, wherein the binding material is 6 nylon, 12 nylon, 612 nylon, 9T nylon, polyphenylene sulfide, ethylene- At least one thermoplastic resin selected from ethyl acrylate copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, or styrene-isoprene-styrene block copolymer, styrene- A soft magnetic ferrite resin composition molded body comprising one or more thermoplastic resins selected from ethylene / butylene / styrene block copolymers and a soft polyolefin resin comprising an ethylene / butylene copolymer (this book) Invention 6).
- the binding material is 6 nylon, 12 nylon, 612 nylon, 9T
- the present invention also relates to a soft magnetic ferrite resin composition molded body according to any one of the present inventions 1 to 6, wherein the soft magnetic ferrite powder content is 88 to 97 wt%.
- This is a ferrite resin composition molded body (Invention 7).
- the present invention is a power transmission device for a non-contact power feeding system obtained by attaching a coil to the soft magnetic ferrite resin composition molded body according to any one of the present inventions 1 to 7 (present invention 8).
- the present invention also provides a soft magnetic ferrite resin composition
- a soft magnetic ferrite resin composition comprising a filler material and a binder material, wherein the filler material is a soft magnetic ferrite powder having an average particle size of 5 to 35 ⁇ m, and the binder material is a thermoplastic resin or A soft magnetic ferrite resin composition characterized in that it is at least one selected from soft polyolefin resins, and the molding density of the molded product of the soft magnetic resin composition is 3.2 to 4.7 g / cm 3 ( Invention 9).
- the present invention is a non-contact power feeding method using the power transmission device for a non-contact power feeding system according to the eighth aspect of the present invention (Invention 10).
- the power transmission device for a non-contact power feeding system in which a coil is affixed to or brought close to the soft magnetic ferrite resin composition molded body according to the present invention is excellent in impact resistance, and can be damaged even by impact such as dropping. There is no.
- by controlling the characteristics of the filling material within a specific range it is excellent in electromagnetic characteristics such as power transmission efficiency.
- a soft magnetic ferrite resin composition molded body according to the present invention is a soft magnetic ferrite resin composition comprising a filling material made of soft magnetic ferrite powder and one or more binding materials selected from thermoplastic resins or soft polyolefin resins. It is a molded body.
- the molding density of the soft magnetic ferrite resin composition molding according to the present invention is 3.2 to 4.7 g / cm 3 .
- the upper limit of the molding density obtained in the present invention is 4.7 g / cm 3 .
- a preferable molding density is 3.5 to 4.7 g / cm 3 .
- the permeability of the soft magnetic ferrite resin composition molded body according to the present invention is 5-15. When the magnetic permeability is less than 5, inductance and power transmission efficiency are reduced.
- the upper limit of the magnetic permeability obtained in the present invention is 15.
- a preferable magnetic permeability is 6 to 15, and a more preferable magnetic permeability is 6 to 14.
- the inductance of the soft magnetic ferrite resin composition molded body according to the present invention is preferably 3.5 to 6 ⁇ H. When the inductance is less than 3.5 ⁇ H, the power transmission efficiency decreases.
- the upper limit of the inductance obtained by the present invention is 6 ⁇ H.
- a preferable inductance is 4 to 6H, and a more preferable inductance is 4 to 5.5 ⁇ H.
- the power transmission efficiency of the soft magnetic ferrite resin composition molded body according to the present invention is preferably 55 to 80%. When the power transmission efficiency is less than 55%, the loss is large and the heat generation becomes intense.
- the upper limit of the power transmission efficiency obtained by the present invention is 80%.
- a preferable power transmission efficiency is 60 to 80%, and a more preferable power transmission efficiency is 60 to 75%.
- the soft magnetic ferrite powder in the present invention includes Mn—Zn ferrite, Ni—Zn ferrite, Ni—Zn—Cu ferrite, Mg—Zn ferrite, Mg—Zn—Cu ferrite, Li—Zn ferrite, Li Spinel ferrite powder having soft magnetism such as —Zn—Cu ferrite is preferable.
- the average particle size of the soft magnetic ferrite powder in the present invention is 5 to 35 ⁇ m. When the average particle size is less than 5 ⁇ m, high filling is not possible and inductance and power transmission efficiency are reduced. When it exceeds 35 ⁇ m, the surface of the molded body is not smooth. A preferred average particle size is 8 to 25 ⁇ m.
- the compression density of the soft magnetic ferrite powder in the present invention is preferably 2.5 to 5 g / cm 3 .
- the compression density is less than 2.5 g / cm 3 , high filling is not possible and inductance and power transmission efficiency are reduced.
- the production method in the present invention does not exceed 5 g / cm 3 .
- a more preferable compression density is 3 to 5 g / cm 3 , and an even more preferable compression density is 3 to 4.5 g / cm 3 .
- the specific surface area of the soft magnetic ferrite powder in the present invention is preferably 0.3 to 4 m 2 / g.
- the specific surface area exceeds 4 m 2 / g, high filling is not possible and inductance and power transmission efficiency are reduced. In the production method of the present invention, it is not less than 0.3 m 2 / g.
- a more preferable specific surface area is 0.3 to 3 m 2 / g.
- the content of the soft magnetic ferrite powder in the present invention is preferably 88 to 97 wt%.
- the content is less than 88 wt%, inductance and power transmission efficiency are lowered. If it exceeds 97 wt%, it becomes difficult to knead with the resin.
- a more preferable content is 89 to 95 wt%.
- the thermoplastic resin in the present invention is 6 nylon, 12 nylon, 612 nylon, 9T nylon, polyphenylene sulfide, ethylene-ethyl acrylate copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene butylene-styrene block. What is necessary is just to select suitably from a copolymer according to the heat resistance, intensity
- the thermoplastic resin in the present invention is one kind selected from 6 nylon, 12 nylon, 612 nylon, 9T nylon, polyphenylene sulfide, and ethylene-ethyl acrylate copolymer when producing a pellet-like soft magnetic ferrite resin composition.
- One method of obtaining the soft magnetic ferrite resin composition molded body according to the present invention is a method of injection molding the pellet-shaped soft magnetic ferrite resin composition.
- the injection pressure at the time of injection molding is 400 to 1600 kg / cm 2 . If the injection pressure exceeds 1600 kg / cm 2 , injection molding becomes difficult.
- 400 kg / cm 2 is the lower limit.
- a preferable injection pressure is 400 to 1500 kg / cm 2
- a more preferable injection pressure is 500 to 1500 kg / cm 2 .
- the soft polyolefin resin in the present invention is an ethylene-butylene copolymer. If necessary, ethylene-butylene copolymers having different molecular weights can be mixed and used.
- the binding material is selected from a styrene-isoprene-styrene block copolymer and a styrene-ethylene-butylene-styrene block copolymer. It is preferable to use a combination of two or more kinds of thermoplastic resins and a soft polyolefin resin made of an ethylene-butylene copolymer. When these resins are used in combination, a soft magnetic ferrite resin composition excellent in flexibility and mechanical strength can be obtained.
- the ratio of the thermoplastic resin to the soft polyolefin resin is preferably 1 to 5.
- the soft magnetic ferrite resin composition molded body according to the present invention is excellent in impact resistance, and is not damaged by an impact such as dropping.
- a soft magnetic ferrite resin composition molded body having a length of 6 cm, a width of 6 cm, and a thickness of 2 mm is not broken even when dropped from a height of 1 m onto concrete.
- the soft magnetic ferrite resin composition molded body according to the present invention is more excellent in heat resistance when one or more of 6 nylon, 612 nylon, 9T nylon, and polyphenylene sulfide are used as a binding material. It does not thermally deform in an environment of 170 ° C.
- the size and thickness of the soft magnetic ferrite resin composition molded body according to the present invention can be appropriately selected according to the purpose.
- soft magnetic ferrite powder is a raw material mixture obtained by mixing raw materials such as oxides, carbonates, hydroxides, and oxalates of each element constituting ferrite in a predetermined composition ratio, or in an aqueous solution.
- the precipitate obtained by precipitating each element can be obtained by firing in the atmosphere at a temperature range of 700 to 1300 ° C. for 1 to 20 hours and then pulverizing.
- soft magnetic ferrite powder obtained by pulverizing waste generated in the manufacturing process of various ferrite cores and sintered ferrite plates may be reused.
- the soft magnetic ferrite resin composition according to the present invention comprises a predetermined resin selected from the above-mentioned soft magnetic ferrite powder and 6 nylon, 12 nylon, 612 nylon, 9T nylon, polyphenylene sulfide, and ethylene-ethyl acrylate copolymer. After mixing at a ratio, it is obtained by kneading in a kneader at 180 to 350 ° C. for 1 minute to 2 hours. In particular, considering the ease of handling in the post-process, a pellet shape is preferable.
- the soft magnetic ferrite resin composition according to the present invention can be obtained by molding the obtained soft magnetic ferrite resin composition into a predetermined shape using an injection molding machine or an extrusion molding machine.
- the soft magnetic ferrite resin composition according to the present invention comprises one or more selected from the above-mentioned soft magnetic ferrite powder, a styrene-isoprene-styrene block copolymer, and a styrene-ethylene-butylene-styrene block copolymer. It is obtained by mixing a thermoplastic resin and a soft polyolefin resin comprising an ethylene-butylene copolymer at a predetermined ratio, and then kneading the mixture at 150 to 250 ° C. for 1 minute to 2 hours.
- the soft magnetic ferrite resin composition is excellent in moldability into a sheet shape, and after making the sheet shape by rolling between rolls following the above kneading, using a mold or blade mold, etc.
- the soft magnetic ferrite resin composition molded body according to the present invention can be obtained by cutting into a desired shape.
- the power transmission device for a non-contact power feeding system according to the present invention can be obtained by attaching a coil having a size and a number of turns according to the purpose to the soft magnetic ferrite resin molded body according to the present invention with an adhesive or the like.
- the coil may be processed into a desired winding method and attached in parallel so as not to protrude from the molded body.
- the power transmission device for the non-contact power supply system described above is the power supply side
- the coil disposed on the coil of the power transmission device is the power reception side
- the current is applied to the power supply side coil
- the electric potential is applied to the power reception side coil by electromagnetic induction. Causing current to flow.
- the coil on the power receiving side may be attached to the ferrite plate if necessary, and the soft magnetic ferrite resin molded body of the present invention may be used as the ferrite plate. It may be used on either the power supply side or the power reception side, or on both the power supply side and the power reception side.
- the power transmission device for a non-contact power feeding system in which a coil is attached to a soft magnetic ferrite resin composition molded body is superior in impact resistance by not using a sintered ferrite core. It is. Furthermore, the power transmission efficiency is excellent by controlling various characteristics of the soft magnetic ferrite powder as a filling material within a predetermined range.
- a typical embodiment of the present invention is as follows.
- the average particle size of the soft magnetic ferrite powder was the value of D 50 obtained by particle size distribution meter HEROS & RODOS (manufactured by Sympatec Co., Ltd.).
- the compression density of the soft magnetic ferrite powder was the density of the green compact obtained by putting 25 g of powder in a mold for molding a cylinder with a diameter of 1 inch and pressing it under a load of 1 t / cm 2 and taking it out. .
- the specific surface area of the soft magnetic ferrite powder was measured using a Macsorb HM model 1208 (manufactured by Mountec Co., Ltd.).
- the injection molding pressure of the soft magnetic ferrite resin composition was measured with a pressure gauge attached to the injection molding machine.
- the molding density of the soft magnetic ferrite resin composition molded body was calculated from the outer dimensions and weight of the obtained molded body.
- a ring core having an outer diameter of 14 mm, an inner diameter of 8 mm, and a thickness of 2 mm was produced from the molded body, and Precision Impedance Analyzer 4294A (manufactured by Agilent Technologies) was used. The value of ⁇ ′ obtained by measurement at 100 kHz was used.
- the inductance of the soft magnetic ferrite resin composition molded body was measured at 100 kHz using an LCR meter IM3523 (manufactured by Hioki Electric Co., Ltd.) with a 10-turn coil affixed to a molded body 6 cm long 6 cm wide 2 mm thick.
- the power transmission efficiency of the soft magnetic ferrite resin composition molded body is a power transmission device in which a 10-turn double-wound coil is attached to a soft magnetic ferrite resin composition molded body having a length of 6 cm, a width of 6 cm, and a thickness of 2 mm.
- An element in which the coil of the turn was affixed to a Ni—Zn—Cu ferrite plate 6 cm long and 6 cm wide and 0.1 mm thick was measured as the power receiving side.
- Impact resistance was judged by dropping a soft magnetic ferrite resin composition molded body (length 6 cm, width 6 cm, thickness 2 mm) onto concrete from a height of 1 m and determining whether or not there were cracks.
- a soft magnetic ferrite resin composition molded body is formed into a dumbbell test piece (total length 175 mm, total width 12.5 mm, thickness 3.2 mm), and a load is applied with a 50 g weight in the center by a three-point bending method. It was exposed for 1 hour in an oven at 170 ° C., and the presence or absence of thermal deformation was determined.
- the styrene-isoprene-styrene block copolymer, styrene-ethylene / butylene-styrene block copolymer and ethylene-butylene copolymer were selected from Table 1 and used.
- Example 1 Ni-Zn-Cu ferrite having an average particle size of 15.1 ⁇ m, a compression density of 3.82 g / cm 3 and a specific surface area of 1.10 m 2 / g was mixed at a ratio of 95 wt% and 12 nylon at a ratio of 5 wt%. The mixture was kneaded at 200 ° C. for 10 minutes with a kneader and then cut into pellets. The composition was injection molded by setting the nozzle temperature of the injection molding machine to 270 ° C. to obtain a plate-like soft magnetic ferrite resin composition molded body having a length of 6 cm, a width of 6 cm, and a thickness of 2 mm.
- the injection pressure was 1493 kg / cm 2 .
- the molding density of the obtained soft magnetic ferrite resin composition molded body was 4.65 g / cm 3 , the magnetic permeability was 13.6, the inductance was 5.43 ⁇ H, and the power transmission efficiency was 74.7%.
- the molded body did not crack in the drop test and was excellent in impact resistance.
- Examples 2-4 In the same manner as in Example 1, a soft magnetic ferrite resin composition and a soft magnetic ferrite resin composition molded body were obtained. Table 2 shows the production conditions and the properties of the obtained soft magnetic ferrite resin composition and soft magnetic ferrite resin composition molded body.
- Example 5 95 wt% of Ni—Zn—Cu based ferrite having an average particle diameter of 14.8 ⁇ m, a compression density of 3.79 g / cm 3 and a specific surface area of 1.18 m 2 / g, 3 wt% of resin A described in Table 1, Resin C was mixed at a ratio of 2 wt% and kneaded at 180 ° C. on a biaxial roll to obtain a sheet-like soft magnetic ferrite resin composition having a thickness of 2 mm. The composition was cut to obtain a plate-like soft magnetic ferrite resin composition molded body having a length of 6 cm and a width of 6 cm and a thickness of 2 mm. The molding density of the obtained soft magnetic ferrite resin composition molded body was 4.63 g / cm 3 , the magnetic permeability was 13.4, the inductance was 5.41 ⁇ H, and the power transmission efficiency was 74.5%.
- Examples 6-8 In the same manner as in Example 5, a soft magnetic ferrite resin composition and a soft magnetic ferrite resin composition molded body were obtained. Table 2 shows the production conditions and the properties of the obtained soft magnetic ferrite resin composition and soft magnetic ferrite resin composition molded body.
- Comparative Example 1 97.5 wt% of Ni—Zn—Cu based ferrite having an average particle diameter of 38.9 ⁇ m, a compression density of 5.33 g / cm 3 , and a specific surface area of 0.25 m 2 / g, and 12 nylon of 2.5 wt% After mixing at a ratio and kneading at 210 ° C. for 15 minutes with a kneader, the mixture was cut into pellets. An attempt was made to injection mold the composition, but the injection pressure was too high to be molded.
- Comparative Example 2 In the same manner as in Example 1, a soft magnetic ferrite resin composition and a soft magnetic ferrite resin composition molded body were obtained. Table 2 shows the production conditions and the properties of the obtained soft magnetic ferrite resin composition and soft magnetic ferrite resin composition molded body.
- Comparative Example 3 In the same manner as in Example 5, a soft magnetic ferrite resin composition and a soft magnetic ferrite resin composition molded body were obtained. Table 2 shows the production conditions and the properties of the obtained soft magnetic ferrite resin composition and soft magnetic ferrite resin composition molded body.
- Comparative Example 4 The sintered density of the Mn—Zn ferrite sintered body obtained by sintering the Mn—Zn ferrite powder at 1300 ° C. is 4.9 g / cm 3 , the magnetic permeability is 2389, the inductance is 5.84 ⁇ H, and the power transmission efficiency is It was 70.3%. The sintered body was cracked in the drop test and was inferior in impact resistance.
- Example 9 Ni—Zn—Cu ferrite having an average particle diameter of 14.6 ⁇ m, a compression density of 3.77 g / cm 3 , and a specific surface area of 1.40 m 2 / g was mixed at a ratio of 94 wt% and 612 nylon at a ratio of 6 wt%. The mixture was kneaded at 230 ° C. for 10 minutes with a kneader and then cut into pellets. The composition was injection molded by setting the nozzle temperature of the injection molding machine to 300 ° C. to obtain a plate-shaped soft magnetic ferrite resin composition molded body having a length of 6 cm, a width of 6 cm, and a thickness of 2 mm.
- the molding density of the obtained soft magnetic ferrite resin composition molding was 4.55 g / cm 3 , the magnetic permeability was 12.3, the inductance was 5.35 ⁇ H, and the power transmission efficiency was 73.0%.
- the molded body did not crack in the drop test and was excellent in impact resistance. Further, in the heat resistance test at 170 ° C., it was not thermally deformed and was excellent in heat resistance.
- Examples 10-11 In the same manner as in Example 9, a soft magnetic ferrite resin composition and a soft magnetic ferrite resin composition molded body were obtained. Table 3 shows the production conditions and various properties of the obtained soft magnetic ferrite resin composition and soft magnetic ferrite resin composition molded body.
- the soft magnetic ferrite resin composition molded body according to the present invention When used in a power transmission device for a non-contact power feeding system, it is excellent in impact resistance, and is not damaged by an impact such as dropping, Excellent electromagnetic characteristics such as power transmission efficiency.
Abstract
Description
本発明において最も重要な点は、軟磁性フェライト樹脂組成物成型体にコイルを貼付した非接触給電システム用電力電送デバイスは、焼結フェライトコアを用いないことにより、耐衝撃性に優れている点である。更に、充填材料である軟磁性フェライト粉末の諸特性を所定の範囲に制御していることにより、電力伝送効率に優れている点である。
平均粒子径が15.1μm、圧縮密度が3.82g/cm3、比表面積が1.10m2/gであるNi-Zn-Cu系フェライトを95wt%、12ナイロンを5wt%の割合で混合し、混練機にて200℃で10分間混練した後、ペレット状に切断した。該組成物を射出成型機のノズル温度を270℃に設定して射出成型し、縦6cm横6cm厚さ2mmの板状の軟磁性フェライト樹脂組成物成型体を得た。その際、射出圧力は1493kg/cm2であった。得られた軟磁性フェライト樹脂組成物成型体の成型密度は4.65g/cm3、透磁率が13.6、インダクタンスが5.43μH、電力伝送効率が74.7%であった。該成型体は落下試験で割れることはなく、耐衝撃性に優れたものであった。
実施例1と同様の方法で、軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体を得た。この時の製造条件及び得られた軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体の諸特性を表2に示す。
平均粒子径が14.8μm、圧縮密度が3.79g/cm3、比表面積が1.18m2/gであるNi-Zn-Cu系フェライトを95wt%、表1記載の樹脂Aを3wt%、樹脂Cを2wt%の割合で混合し、2軸のロール上にて180℃で混練し、厚さ2mmのシート状の軟磁性フェライト樹脂組成物を得た。該組成物を切断して縦6cm横6cm厚さ2mmの板状の軟磁性フェライト樹脂組成物成型体を得た。得られた軟磁性フェライト樹脂組成物成型体の成型密度は4.63g/cm3、透磁率が13.4、インダクタンスが5.41μH、電力伝送効率が74.5%であった。
実施例5と同様の方法で、軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体を得た。この時の製造条件及び得られた軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体の諸特性を表2に示す。
平均粒子径が38.9μm、圧縮密度が5.33g/cm3、比表面積が0.25m2/gであるNi-Zn-Cu系フェライトを97.5wt%、12ナイロンを2.5wt%の割合で混合し、混練機にて210℃で15分間混練した後、ペレット状に切断した。該組成物を射出成型することを試みたが、射出圧力が高すぎて成型ができなかった。
実施例1と同様の方法で、軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体を得た。この時の製造条件及び得られた軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体の諸特性を表2に示す。
実施例5と同様の方法で、軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体を得た。この時の製造条件及び得られた軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体の諸特性を表2に示す。
Mn-Znフェライト粉末を1300℃で焼結して得られたMnーZnフェライト焼結体の焼結密度は4.9g/cm3、透磁率は2389、インダクタンスは5.84μH、電力伝送効率は70.3%であった。該焼結体は落下試験で割れが生じ、耐衝撃性に劣るものであった。
平均粒子径が14.6μm、圧縮密度が3.77g/cm3、比表面積が1.40m2/gであるNi-Zn-Cu系フェライトを94wt%、612ナイロンを6wt%の割合で混合し、混練機にて230℃で10分間混練した後、ペレット状に切断した。該組成物を射出成型機のノズル温度を300℃に設定して射出成型し、縦6cm横6cm厚さ2mmの板状の軟磁性フェライト樹脂組成物成型体を得た。得られた軟磁性フェライト樹脂組成物成型体の成型密度は4.55g/cm3、透磁率が12.3、インダクタンスが5.35μH、電力伝送効率が73.0%であった。該成型体は落下試験で割れることはなく、耐衝撃性に優れたものであった。
また、170℃の耐熱性試験では、熱変形することはなく、耐熱性に優れたものであった。
実施例9と同様の方法で、軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体を得た。この時の製造条件及び得られた軟磁性フェライト樹脂組成物、軟磁性フェライト樹脂組成物成型体の諸特性を表3に示す。
Claims (10)
- 充填材料と結合材料とを含む軟磁性フェライト樹脂組成物の成型体であって、充填材料が平均粒子径が5~35μmである軟磁性フェライト粉末であり、結合材料が熱可塑性樹脂又は軟質ポリオレフィン樹脂から選ばれる1種以上であり、軟磁性フェライト樹脂組成物の成型体の成型密度が3.2~4.7g/cm3であり、透磁率が5~15であることを特徴とする軟磁性フェライト樹脂組成物成型体。
- インダクタンスが3.5~6μHである請求項1記載の軟磁性フェライト樹脂組成物成型体。
- 電力伝送効率が55~80%である請求項1又は2に記載の軟磁性フェライト樹脂組成物成型体。
- 充填材料がスピネル型フェライトである請求項1~3のいずれかに記載の軟磁性フェライト樹脂組成物成型体。
- 軟軟磁性フェライト粉末の圧縮密度が2.5~5g/cm3、比表面積が0.3~4m2/gである請求項1~4のいずれかに記載の軟磁性フェライト樹脂組成物成型体。
- 結合材料が6ナイロン、12ナイロン、612ナイロン、9Tナイロン、ポリフェニレンスルファイド、エチレン-エチルアクリレート共重合体、スチレンーイソプレン-スチレンブロック共重合体、スチレン-エチレン・ブチレン-スチレンブロック共重合体から選ばれる熱可塑性樹脂の少なくとも一種又は、スチレンーイソプレン-スチレンブロック共重合体、スチレン-エチレン・ブチレン-スチレンブロック共重合体から選ばれた1種又は2種以上の熱可塑性樹脂とエチレン-ブチレン共重合体からなる軟質ポリオレフィン樹脂である請求項1~5のいずれかに記載の軟磁性フェライト樹脂組成物成型体。
- 軟磁性フェライト粉末の含有量が88~97wt%である請求項1~6のいずれかに記載の軟磁性フェライト樹脂組成物成型体。
- 請求項1~7のいずれかに記載の軟磁性フェライト樹脂組成物成型体にコイルを貼付して得られた非接触給電システム用電力伝送デバイス。
- 充填材料と結合材料とを含む軟磁性フェライト樹脂組成物であって、充填材料が平均粒子径が5~35μmである軟磁性フェライト粉末であり、結合材料が熱可塑性樹脂又は軟質ポリオレフィン樹脂から選ばれる1種以上であり、軟磁性フェライト樹脂組成物の成型体の成型密度が3.2~4.7g/cm3である軟磁性フェライト樹脂組成物。
- 請求項8に記載の非接触給電システム用電力伝送デバイスを用いた非接触給電方法。
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180205135A1 (en) * | 2015-08-06 | 2018-07-19 | Thin Film Electronics Asa | Wireless Communication Device with Integrated Ferrite Shield and Antenna, and Methods of Manufacturing the Same |
KR20180109696A (ko) | 2017-03-28 | 2018-10-08 | 티디케이가부시기가이샤 | 자성 코어용 연자성 박대, 자성 코어, 코일 유닛 및 와이어리스 전력 전송 유닛 |
JP2019169553A (ja) * | 2018-03-22 | 2019-10-03 | ホシデン株式会社 | コイル、無接点給電ユニット、及びコイルの製造方法 |
JP2020524721A (ja) * | 2016-12-19 | 2020-08-20 | スリーエム イノベイティブ プロパティズ カンパニー | 軟強磁性粒子材料を含有する熱可塑性ポリマー複合体及びその製造方法 |
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Families Citing this family (6)
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JP6451656B2 (ja) * | 2016-01-28 | 2019-01-16 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
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Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08175233A (ja) | 1994-12-26 | 1996-07-09 | Toyota Autom Loom Works Ltd | 非接触給電システム |
JPH11176676A (ja) | 1997-12-09 | 1999-07-02 | Tokin Corp | 小型非接触伝送装置 |
JP2003234206A (ja) * | 2002-02-07 | 2003-08-22 | Asahi Kasei Corp | 軟磁性固形材料とその製造方法 |
JP2005104785A (ja) * | 2003-09-30 | 2005-04-21 | Tdk Corp | フェライト粉末、複合絶縁磁性組成物及び電子部品 |
JP2008207365A (ja) | 2007-02-23 | 2008-09-11 | Yonezawa Densen Kk | 防磁シートとその製造方法 |
JP2009295985A (ja) * | 2008-06-05 | 2009-12-17 | Tridelta Weichferrite Gmbh | 軟磁性材料、およびこの軟磁性材料から構成される物品の製造方法 |
JP2010114407A (ja) * | 2008-10-10 | 2010-05-20 | Dowa Electronics Materials Co Ltd | 混合フェライト粉およびその製造方法、並びに、電波吸収体 |
JP2011023673A (ja) * | 2009-07-21 | 2011-02-03 | Nec Tokin Corp | 非晶質軟磁性粉末、トロイダルコア、インダクタおよびチョークコイル |
WO2011077601A1 (ja) * | 2009-12-25 | 2011-06-30 | 株式会社タムラ製作所 | 圧粉磁心及びその製造方法 |
JP2011216745A (ja) * | 2010-03-31 | 2011-10-27 | Hitachi Powdered Metals Co Ltd | 圧粉磁心およびその製造方法 |
JP2012151179A (ja) * | 2011-01-17 | 2012-08-09 | Tdk Corp | 圧粉コア |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0986073B1 (en) * | 1998-03-27 | 2011-02-09 | The Furukawa Electric Co., Ltd. | Separation type transformer core |
JP4683174B2 (ja) * | 2001-02-14 | 2011-05-11 | 戸田工業株式会社 | 軟磁性シート |
CN101208165B (zh) * | 2005-05-11 | 2013-03-27 | 英孚拉玛特公司 | 磁性合成物及其制造和使用方法 |
KR101385869B1 (ko) * | 2007-03-30 | 2014-04-17 | 도다 고교 가부시끼가이샤 | 본드 자석용 페라이트 입자 분말, 본드 자석용 수지 조성물및 이들을 이용한 성형체 |
DE102008026887B4 (de) * | 2008-06-05 | 2012-02-23 | Tridelta Weichferrite Gmbh | Weichmagnetischer Kompositwerkstoff |
JP5372610B2 (ja) * | 2009-06-08 | 2013-12-18 | Necトーキン株式会社 | 非接触電力伝送装置 |
-
2014
- 2014-10-30 CN CN201480058536.7A patent/CN105684107A/zh active Pending
- 2014-10-30 US US15/033,355 patent/US20160276079A1/en not_active Abandoned
- 2014-10-30 EP EP14858374.3A patent/EP3065149B1/en active Active
- 2014-10-30 KR KR1020167010313A patent/KR102390020B1/ko active IP Right Grant
- 2014-10-30 JP JP2015545296A patent/JPWO2015064694A1/ja active Pending
- 2014-10-30 WO PCT/JP2014/078905 patent/WO2015064694A1/ja active Application Filing
- 2014-10-31 TW TW103137805A patent/TW201527379A/zh unknown
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08175233A (ja) | 1994-12-26 | 1996-07-09 | Toyota Autom Loom Works Ltd | 非接触給電システム |
JPH11176676A (ja) | 1997-12-09 | 1999-07-02 | Tokin Corp | 小型非接触伝送装置 |
JP2003234206A (ja) * | 2002-02-07 | 2003-08-22 | Asahi Kasei Corp | 軟磁性固形材料とその製造方法 |
JP2005104785A (ja) * | 2003-09-30 | 2005-04-21 | Tdk Corp | フェライト粉末、複合絶縁磁性組成物及び電子部品 |
JP2008207365A (ja) | 2007-02-23 | 2008-09-11 | Yonezawa Densen Kk | 防磁シートとその製造方法 |
JP2009295985A (ja) * | 2008-06-05 | 2009-12-17 | Tridelta Weichferrite Gmbh | 軟磁性材料、およびこの軟磁性材料から構成される物品の製造方法 |
JP2010114407A (ja) * | 2008-10-10 | 2010-05-20 | Dowa Electronics Materials Co Ltd | 混合フェライト粉およびその製造方法、並びに、電波吸収体 |
JP2011023673A (ja) * | 2009-07-21 | 2011-02-03 | Nec Tokin Corp | 非晶質軟磁性粉末、トロイダルコア、インダクタおよびチョークコイル |
WO2011077601A1 (ja) * | 2009-12-25 | 2011-06-30 | 株式会社タムラ製作所 | 圧粉磁心及びその製造方法 |
JP2011216745A (ja) * | 2010-03-31 | 2011-10-27 | Hitachi Powdered Metals Co Ltd | 圧粉磁心およびその製造方法 |
JP2012151179A (ja) * | 2011-01-17 | 2012-08-09 | Tdk Corp | 圧粉コア |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180205135A1 (en) * | 2015-08-06 | 2018-07-19 | Thin Film Electronics Asa | Wireless Communication Device with Integrated Ferrite Shield and Antenna, and Methods of Manufacturing the Same |
JP2020524721A (ja) * | 2016-12-19 | 2020-08-20 | スリーエム イノベイティブ プロパティズ カンパニー | 軟強磁性粒子材料を含有する熱可塑性ポリマー複合体及びその製造方法 |
JP7122308B2 (ja) | 2016-12-19 | 2022-08-19 | スリーエム イノベイティブ プロパティズ カンパニー | 軟強磁性粒子材料を含有する熱可塑性ポリマー複合体及びその製造方法 |
KR20180109696A (ko) | 2017-03-28 | 2018-10-08 | 티디케이가부시기가이샤 | 자성 코어용 연자성 박대, 자성 코어, 코일 유닛 및 와이어리스 전력 전송 유닛 |
JP2022115872A (ja) * | 2017-05-30 | 2022-08-09 | モーメンタム ダイナミックス コーポレーション | ワイヤレス電力伝送薄型コイルアセンブリ |
JP7350382B2 (ja) | 2017-05-30 | 2023-09-26 | インダクトイーブイ インク. | ワイヤレス電力伝送薄型コイルアセンブリ |
JP2019169553A (ja) * | 2018-03-22 | 2019-10-03 | ホシデン株式会社 | コイル、無接点給電ユニット、及びコイルの製造方法 |
JP7063668B2 (ja) | 2018-03-22 | 2022-05-09 | ホシデン株式会社 | コイル、無接点給電ユニット、及びコイルの製造方法 |
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JPWO2015064694A1 (ja) | 2017-03-09 |
KR20160084372A (ko) | 2016-07-13 |
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