145results about "Cores/yokes" patented technology

This invention proposes a metal soft magnetic powder core with excellent low-frequency magnetic properties and its preparation method, belonging to the field of magnetic materials. Using at least nano-boron powder and iron-silicon soft magnetic alloy powder as raw materials, high-temperature diffusion and high-temperature nitriding treatments are employed. Part of the nano-boron powder forms a high-resistivity iron-silicon-boron permeation layer on the surface of the iron-silicon soft magnetic alloy powder, while some nano-boron powder forms a boron nitride insulating layer with both high resistivity and high thermal stability between the iron-silicon soft magnetic alloy powders, effectively controlling eddy currents. Hot pressing further increases the density of the metal soft magnetic powder core, reduces the demagnetizing field, thereby improving permeability and reducing hysteresis loss. Thus, excellent low-frequency magnetic properties of high density, high permeability, and low loss are simultaneously obtained in the metal soft magnetic powder core.

A magnetic element includes a magnetic core, at least one excitation winding and an auxiliary winding. The magnetic core includes at least one first magnetic leg, a second magnetic leg and a third magnetic leg. Each of the at least one magnetic leg is wound with an excitation winding, wherein a vector sum of magnetic flux passing through each of the at least one first magnetic leg is a first magnetic flux, a second magnetic flux is passing through the second magnetic leg, and a third magnetic flux is passing through the third magnetic leg. The auxiliary winding is partially or completely wound on the second magnetic leg, wherein the auxiliary winding is used to clamp the second magnetic flux.

Disclosed are a transformer, a power conversion device, and a medical device. The transformer includes a primary winding, a plurality of magnetic core assemblies, and a plurality of secondary windings. The primary winding is configured to pass through the plurality of magnetic core assemblies. The plurality of secondary windings are wound on the plurality of magnetic core assemblies, respectively. Each of the plurality of magnetic core assemblies has an air gap of the same size. And / or, the transformer includes a capacitor and an impedance element. The capacitor is connected in series with the impedance element. The series-connected capacitor and impedance element are connected to two ends of a corresponding secondary winding.

An integrated magnetic component (1, 1a, 1b, 1c, 1d, 1e, 1f) is disclosed and includes a plurality of PCBs (4, 4a, 4b), a transformer (T) and a plurality of inductors (3, 3a, 3b, 3c, 3d, 3e, 3f). The transformer (T) includes a plurality of primary windings (21), a plurality of secondary windings (22), and two pieces of transformer cores (23). The primary windings (21) and the secondary windings (22) are disposed on the PCBs (4, 4a, 4b) and wound around the two pieces of transformer cores (23). The inductors (3, 3a, 3b, 3c, 3d, 3e, 3f) are disposed on the PCBs (4, 4a, 4b) and connected to the transformer (T). The primary windings (21) and the secondary windings (22) of the transformer (T) are disposed correspondingly in pairs on one of the PCBs (4, 4a, 4b), and the inductors (3, 3a, 3b, 3c, 3d, 3e, 3f) are disposed adjacent to the transformer (T).

The wound core is a wound core having a wound core body in which a plurality of polygonal annular directionality electromagnetic steel sheets are stacked in a side view, the directionality electromagnetic steel sheets having planar portions and curved portions alternately and continuously in a length direction, and a crystal grain size Dpx of the directionality electromagnetic steel sheets being 2W or less in at least one curved portion.

This invention provides a soft magnetic powder that suppresses the amount of binder added during molding and enables the production of high-density and high-strength molded bodies; a pressed magnetic core and magnetic element containing such a soft magnetic powder; and an electronic device equipped with the aforementioned magnetic element. The soft magnetic powder is composed of Fe, 2.5% by mass or more and 7.5% by mass or less Si, 1.0% by mass or more and 10.0% by mass or less Cr, and 1.0% by mass or less impurities. Its average roundness is 0.80 or more and less than 0.95. In a cumulative particle size distribution curve, when the particle size at 10% cumulative value from the small diameter side is defined as D10, the particle size at 50% cumulative value is defined as D50, and the particle size at 90% cumulative value is defined as D90, the particle size D50 is 3.0 μm or more and 11.0 μm or less, and the particle size difference D90-D10 is 4.0 μm or more and 22.0 μm or less. The particle size D50 is defined as A [μm], and the specific surface area is defined as B [m²]. 2 When / g], A×B is greater than 1.20 and less than 2.40.

A soft magnetic powder coated with a silicon coating, wherein the silicon coating is of formula (I) and Si x B y O 2x+1.5y (I) (wherein x = 0.5 to 1.5, y = 1.0 to 1.5) A soft magnetic powder coated with a silicon coating is obtained after heat treatment at a temperature in the range of 350 to 700°C, with an average particle size D of 0.5 to 250 μm. 50 A soft magnetic powder coated with a silicon coating, having the following properties.

This invention provides a NiZn-based ferrite that offers excellent productivity and can suppress the increase in the rate of change of complex relative permeability with respect to temperature, as well as a noise filter using the same. [Solution] A NiZn-based ferrite containing Fe in the form of "48.06 mol% or more and 48.43 mol% or less" in Fe2O3 equivalent, Zn in the form of "29.47 mol% or more and 29.96 mol% or less" in ZnO equivalent, Cu in the form of "5.70 mol% or more and 6.30 mol% or less" in CuO equivalent, and Ni in the form of "15.70 mol% or more and 16.34 mol% or less" in NiO equivalent, wherein when the total amount of Fe2O3, ZnO, NiO and CuO is taken as 100 mol%, the total amount of Fe2O3 and ZnO is "77.51 mol% or more and 78.39 mol% or less".

A ferromagnetic powder composition comprising (i) soft magnetic iron-based core particles and (ii) a first coating layer that at least partially covers and is in direct contact with the surface of the core particles, the first coating layer comprising a) a general formula (K₂O). α (SiO2) β a) silicates, wherein α is the molar number of K2O, β is the molar number of SiO2, and the β / α molar ratio is in the range of 0.5 to 4.1, wherein the silicates are present in an amount of 0.02 wt% to 1.0 wt% based on the total weight of the ferromagnetic powder composition; b) optionally, particles comprising a compound of bismuth and oxygen having a Di in the range of 0.1 μm to 10 μm as measured according to ISO 13320-1. 50 c) as a dopant dissolved in silicate (a) by oxoanions or hydroxyanions. A second coating layer may be provided. Methods for producing the composition and manufacturing an object, and an object comprising the composition.

Embodiments disclosed herein include an inductor. In an embodiment, the inductor comprises a first core and a second core. In an embodiment, a third core is between the first core and the second core. A first gap is provided between the first core and the third core and a second gap is provided between the second core and the third core. In an embodiment, the third core comprises, a first portion with a first width, a second portion with a second width, and a third portion with a third width between the first portion and the second portion. In an embodiment, the third width is smaller than both of the first width and the second width.

A coil assembly is provided, including a main body including first and second side surfaces opposite to each other in a first direction and third and fourth side surfaces opposite to each other in a second direction, the main body including a magnetic material, a coil disposed in the main body, the coil forming at least one turn, and a lead frame connected to both ends of the coil in the main body, the lead frame being disposed on the first and second side surfaces of the main body. When a shortest distance between the coil and the third side surface of the main body is denoted by M and a length of the main body in the second direction is denoted by W, M / W satisfies greater than or equal to 0 and less than or equal to 0.1. y y ​​

The present invention discloses a layer material (1) made of a soft magnetic material, in particular an amorphous soft magnetic material, further in particular a metallic glass, preferably having a nanocrystalline structure, for producing a core (3) of a magnetic field-sensitive component, in particular with a plurality of layers, wherein the layer material is characterized in that the layer material (1) is provided on at least one side with a silica layer (2) made of water-insoluble silica.The present invention further discloses a core (3) of a magnetic field-sensitive component comprising a plurality of layers of a layer material (1) made of a soft magnetic material, in particular an amorphous soft magnetic material, and more specifically a metallic glass, preferably having a nanocrystalline structure, wherein the core (3) of the magnetic field-sensitive component is characterized in that a silica layer (2) of water-insoluble silica is formed between at least two layers of the layer material (1). The present invention further discloses methods for producing a core (3) of a magnetic field-sensitive component comprising a plurality of layers of a layer material (1) made of a soft magnetic material, in particular an amorphous soft magnetic material, and more specifically a metallic glass, preferably having a nanocrystalline structure.

A soft magnetic powder contains: Fe; Si having a content of 2.5 mass % or more and 7.5 mass % or less; Cr having a content of 1.0 mass % or more and 10.0 mass % or less; and impurities of 1.0 mass % or less. An average circularity is 0.80 or more and less than 0.95, in a cumulative particle size distribution curve, when D10 is defined as a particle diameter at which a cumulative value on the small diameter side is 10%, D50 is defined as a particle diameter at which a cumulative value is 50%, and D90 is defined as a particle diameter at which a cumulative value is 90%, the particle diameter D50 is 3.0 μm or more and 11.0 μm or less, a particle diameter difference D90−D10 is 4.0 μm or more and 22.0 μm or less, and A×B is 1.20 or more and 2.40 or less, where A [μm] is the particle diameter D50 and B [m2 / g] is a specific surface area.

A coil unit includes a coil and a core member. The coil receives AC electric power transmitted in a contactless manner from an electric power transmission apparatus. The core member is formed of a directional magnetic material in sheet form. The core member is arranged on a rearward side of the coil when seen from the electric power transmission apparatus when the electric power transmission apparatus and the coil face each other. An outer shape of each of the coil and the core member is a rectangular annular shape. An orientation direction of the core member and a direction along a winding direction of the coil are orthogonal to each other in straight line portions that face each other of the coil and the core member.

A magnetic core containing specific particles is provided. The magnetic core has a surface portion having a small distance from an outermost surface of the magnetic core and a central portion having a large distance from the outermost surface of the magnetic core. The specific particles have an oxide phase having a specific thickness, and the specific particles contained in the surface portion and the specific particles contained in the central portion have a specific relationship in thickness of the oxide phase. Alternatively, the magnetic core contains soft magnetic metal particles. The soft magnetic metal particles have an oxide phase on a surface. A relationship between a maximum thickness portion of the oxide phase and an anti-maximum thickness portion is in a specific relationship.

A lens barrel includes a printed-wiring board located on an outside of a lens as viewed in a first direction in which an optical axis of the lens extends and including a first principal surface on an object side, and a coil component including a winding portion and a core portion and mounted on the first principal surface of the printed-wiring board. The core portion includes first and second winding core portions with a gap therebetween in an axial direction in which the first and second winding core portions extend, around which the winding portion is wound. A number of turns of the winding portion around the first winding core portion is smaller than a number of turns of the winding portion around the second winding core portion. The first winding core portion is located on a side closer to an optical axis than the second winding core portion.

The invention proposes a magnetic component (1) for an electrical and / or electronic module, wherein the magnetic component (1) comprises a magnetic core (10) and an electrical conductor (6) surrounding the magnetic core (10), wherein a bridge element (20) is arranged on the magnetic core (10), wherein at least a part of the bridge element (20) is surrounded by an electrical measuring conductor (30), wherein the electrical measuring conductor (30) is designed to measure a zero current in the electrical conductor (6) surrounding the magnetic core (10).

This invention discloses a magnetically conductive plate assembly, a sound-generating device, and an electronic device, relating to the field of acoustic technology. The magnetically conductive plate assembly includes a body portion and a composite coating disposed on the surface of the body portion. The composite coating includes a first coating and a second coating. The first coating is disposed on the surface of the body portion and is composed of a polycrystalline material. The second coating is disposed on the surface of the first coating away from the body portion. The saturation magnetic induction intensity of the first coating is 1.5~3 T, and the charge transfer resistance of the second coating in a 3.5 wt.% NaCl solution is 1~200 KΩ·cm. 2 The magnetic conductive plate assembly of the present invention aims to solve the technical problem of how to improve the magnetic permeability and corrosion resistance of the magnetic conductive plate assembly.

An oriented magnetic core lamination technique and a method of producing circular lamination cores. The method includes cutting rectangular strips with teeth pointing in a single direction (may not be the traverse or rolling direction) from the steel sheet plane, as opposed to directly punching circular laminates from the steel sheet with the teeth pointing in all directions. The strips are cut in such a way that the short side is aligned to the direction that has the best magnetic properties. The strips can then be bent into a donut or toroidal shape, either inwardly (with teeth pointing to the circle center) or outwardly (with teeth pointing out of the center) depending on the design of the lamination core. The direction with the best magnetic properties may be determined by non-destructive methods such as magnetic Barkhausen noise (MBN) analysis, x-ray diffraction (XRD), or electron backscatter diffraction (EBSD).

A soft magnetic alloy ribbon is made of a Fe-based soft magnetic alloy and includes a first laser peening trace row and a second laser peening trace row each of which includes a plurality of laser peening traces in a row in a first direction and which are arranged adjacent to each other in a second direction intersecting the first direction, and a domain wall extending in a third direction, in which D0<D1 where a straight line at an equal separation distance from the first laser peening trace row and the second laser peening trace row is defined as a central line, a straight line which has a first distance where a distance from the first laser peening trace row is shorter than the separation distance is defined as a first reference line, a width of the domain wall at a position intersecting the central line is defined as D0, and a width of the domain wall at a position intersecting the first reference line is defined as D1.

To provide a composite inductor that is suppressed in magnetic saturation while suppressing a binding between coil conductors, and provide a DC-DC converter using the same.SOLUTION: In an inductor 1, a magnetic flux between a pair of coil conductors 20A and 20B is shielded by a magnetic body 30 interposed between the pair of coil conductors 20A and 20B. In the inductor 1, side surfaces 30e and 30f of the magnetic body 30 are projected outside of a parallel part 21 of each coil conductor 20, so that the magnetic flux generated in the parallel part 21 is shielded by the magnetic body 30. Further, in the inductor 1, an upper surface 30a of the magnetic body 30 is positioned below an upper surface 22a of a coupling part 22 of each coil conductor 20, so that the magnetic body 30 is less likely to be influenced by a magnetic field generated in the coupling part 22 of each coil conductor 20. Thus, a magnetic distribution in the magnetic body 30 is made uniform, and a magnetic saturation can be suppressed.SELECTED DRAWING: Figure 3

The utility model discloses a miniaturized high isolation degree coupler relates to the field of coupler, including the casing and the magnetic core, the lateral wall of casing adopts recessed structure to set up, the magnetic core sets up at the recessed position department of casing's lateral wall, the lateral wall of casing and be located the recessed position department is equipped with the protection isolation cover that will the magnetic core block, the protection isolation cover includes the upper cover body and lower cover body of magnetic adsorption setting, the inside of upper cover body and the inside of lower cover body all are equipped with the shielding layer. The utility model discloses have high isolation degree structure, avoid the interference that the outside world's electromagnetism causes to the magnetic core, avoid signal crosstalk and the phenomenon of error code simultaneously, thereby make the coupler can be accurately detected, in addition, have good heat conduction performance, improve the stability of coupler use.

To provide amorphous alloy soft magnetic powder having both high magnetic permeability and low coercive force, a powder magnetic core containing the amorphous alloy soft magnetic powder and a magnetic element, and an electronic device capable of achieving high output.SOLUTION: Amorphous alloy soft magnetic powder is constituted of particles having a composition with a compositional formula Fea(Si1-xBx)bCc represented by ratios of the number of atoms [provided that a, b, c and x satisfy 76.0≤a≤81.0, 16.0≤b≤22.0, 0<c≤3.0 and 0.5≤x≤0.9]. When XAFS measurement is performed with an analysis depth set to a surface, an obtained Si-K absorption edge XANES spectrum has a peak A having an energy in a range of 1,845±1 eV and a peak B having an energy in a range of 1,848±1 eV, and an intensity ratio A / B is 0.25 or less where A is an intensity of the peak A and B is an intensity of the peak B.SELECTED DRAWING: Figure 7

A disruptive improvement in reactors is disclosed. The operating principal of this invention is to create an abrupt change, in the stored potential energy, Wm, in magnetic flux (77), via at least one localized increase (87) and at least one localized decrease (82), of the magnetic field intensity, within the boundaries of a flux loop. Since current flow through a reactor can not change abruptly, a paradox is created. To counteract mentioned paradox, at least some magnetic flux (77a) components, may be forced to jump a non- magnetic-section (88), dependent on the power level, of the frequency, components in mentioned flux. The disclosed arrangement may cause a non-linear response, resulting in advantages over a prior art reactor, (with a linear response); including: reduce reactance, reduced apparent power and increased true power factor, at the fundamental power frequency, f(fundamental). A new circuit symbol (70), for the invention, is suggested.